JP2973307B2 - Replaceable blade 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 replaceable blade-type safety razor, and more particularly to a so-called swing safety razor in which a replaceable blade swings around a journal axis.

[0002]

2. Description of the Related Art A conventional safety razor replacement blade has a structure in which a thin metal blade is sandwiched between a plastic blade base and a top plate. The spare blades are housed one by one in five or ten chambers provided in a relatively thin spare blade container. The stored spare blades are laid down so that the top plate is on the lower side and the blade base is on the upper side, and the spare blades are locked in the room by locking means.

When a spare blade is used, the journal bearing provided on the back surface of the blade base faces upward, so that the arm of the holder is opened and the journal shaft is connected to the journal bearing. When the holder is lifted upward, the blade is taken out of the chamber while being connected to the holder.

[0004]

The conventional swinging safety razor is used in such a manner that the spare blade is taken out and used as described above. The shape of the pair of journal shafts is common,
The shape of the pair of journal bearings is also common. Therefore, it is possible to combine not only a normal connection but also a wrong connection.

[0005] As described above, since the spare blade is stored lying down in the room of the spare blade container with the top plate facing down,
It is not possible to see in which direction the blade edge of the stored spare blade faces. Therefore, there is a possibility that the spare blade is erroneously attached to the holder in the reverse direction. Even if the spare blade is mounted in the opposite direction, it can be used by pulling the holder in the opposite direction. However, it is natural that it is very difficult to use it, but some users misunderstand that the installation of the replacement blade in the opposite direction is normal,
The safety razor can be blamed for being extremely difficult to use. SUMMARY OF THE INVENTION It is an object of the present invention to provide a safety razor in which a spare blade cannot be mounted on a holder in a reverse direction, and can be mounted swingably only when mounted in a forward direction. .

[0006]

According to the structure of the present invention, a pair of arms 2 and 2 are movably mounted on the top of the holder 1, and the ends of the arms 2 and 2 are laterally jagged. -The armatures 3, 2 are provided, and the arms 2, 2 can return to the original position after moving so that the interval between the journals 3, 3 changes. Journal bearings 6 and 6 are formed on the back surface of the blade base 7, and the journal bearings 6 and 6 are formed.
And the journal shafts 3 and 3 are coupled to each other so that the spare blade 4 can be attached to the holder 1 so as to be swingable about the journal axis. -1, the journal shafts 3 and 3 of the holder are mounted on the blades of the replacement blade when the replacement blade 4 is to be mounted so as to face in the direction opposite to the forward direction which is the normal mounting direction. -A reverse regulating portion and a holder provided on the blade base 7 of the spare blade before reaching the null bearings 6 and 6-
1 is in contact with the reverse direction regulating portion provided at the top of
The movement of the null shafts 3 and 3 is stopped, and the coupling with the journal bearings 6 and 6 is restricted. When the replacement blade 4 is mounted on the holder 1 in the forward direction, the restriction is released and the replacement blade 4 is removed. The holder has a means that can be swingably mounted on the holder, and the reverse direction restricting portions provided on the blade base and the holder are three in total, one of which is one of the blade base and the holder. One of the members is provided at the center, one of the front and rear positions is one of them, and the other two are provided on both sides of the other member, and the one of the back and forth positions is one of the reverse direction restriction. The position is different from that of the part.

According to a second aspect of the present invention, in addition to the configuration of the first aspect, a concave portion 9 is provided at the center of the front portion 8 of the upper surface of the holder. 15 and 15 are formed, and a projection 11 is formed upward at the center of the upper surface rear portion 10 of the holder. A configuration is added in which the front projection 16 is integrally provided at the center of the front surface of the back surface of the blade base 7 with an interval substantially equal to the interval between 15 and 15.

[0008]

The present invention is configured as described above, and when the replacement blade 4 is to be mounted on the holder 1 in the opposite direction, the reverse direction regulating portion provided on the blade base 7 of the replacement blade. And the reverse direction regulating portion provided on the top of the holder 1 cooperates to restrict the coupling of the journal shafts 3 and 3 so that they do not reach the positions of the journal bearings 6 and 6. When the blade 4 is attached to the holder 1 in the forward direction, the restriction is released and the spare blade 4 is swingably mounted on the holder-1. Therefore, the spare blade 4 is never attached to the holder 1 in the reverse direction, and all users can use the spare blade in a normal state. Further, when the replacement blade 4 is mounted in the forward direction, the restriction is released regardless of the presence of the reverse direction restriction portion, and the replacement blade is swingably mounted. Also,
When the replacement blade 4 is mounted so as to face in the opposite direction, before the journal shafts 3 of the holder reach the journal bearings 6 of the replacement blade, the blade of the replacement blade is used. The reverse direction restricting portion provided on the base 7 and the reverse direction restricting portion provided on the top of the holder 1 come into contact with each other to stop the movement of the journal shafts 3, 3, and to move between the journal bearings 6 and 6. Binding can be regulated.

[0009]

Embodiments of the present invention will be described with reference to the drawings. The features of the present invention reside in the shape of the top of the holder-1 and the back surface of the replacement blade 4, that is, the shape of the blade base 7. A pair of arms 2 and 2 are attached to the top of the holder 1 so as to be rotatable about its base. The arms 2 and 2 are closed, that is, the arms 2 and 2 are oriented substantially parallel to the length direction of the holder 1, and the arms 2 and 2 are moved from the closed state.
Its base is pivoted so that it can resiliently pivot outward and open slightly. As the arms 2 and 2 rotate, the interval between the journal shafts 3 and 3 increases. A push button 12 is mounted on the back side of the holder 1. This push button is used to forcibly open the arms 2 and 2 and remove the mounted blade from the arm. Used for Since these specific structures are not the gist of the present invention, they will be omitted. However, since these structures are already known and are described in detail in, for example, Japanese Patent Publication No. 57-12640, and are sold as commodities, those skilled in the art may manufacture be able to.
Conversely, with respect to the direction of the journal axis,
An outward journal shaft is provided at the tip of
By rotating the arms 2 and 2 to close, the journal may be journal-connected to the journal bearing of the spare blade from inside.

At the ends of the arms 2 and 2, there are provided inward journal shafts 3 and 3, respectively. The outer ends of the journal shafts 3, 3 are formed on inclined surfaces 17, 17, respectively. This means that the journal shafts 3, 3 are pressed against the inclined surfaces 18, 18 of the journal bearing in cooperation with the inclined surfaces 18, 18 formed on the journal bearings 5, 5 of the spare blade. This is because the arms 2, 2 open naturally when they are turned on, and the journal shafts 3, 3 are easily and automatically connected to the journal bearings 6, 6.

The upper surface front portion 8 of the holder 1 is formed so as to extend in a direction substantially perpendicular to the arm 2, and the center thereof is cut off to form a concave portion 9. By providing the concave portion 9, the portions on both sides of the concave portion 9
5, 15 are formed. The upper rear portion 10 of the top of the holder 1 is slightly inclined downward and rearward, and the convex portion 1 is provided at the center.
1 is formed upward.

The replacement blade 4 has a blade body fixedly held between the blade base 7 and the top plate 13, and two rear projections 14, 14 are integrally provided at the rear of the back surface of the blade base 7. . Both rear projections 1
The space between the overhang portions 4 and 14 is substantially equal to the space between the overhang portions 15 and 15 described above. A front projection 16 is integrally provided at the center of the front of the back surface of the blade base 7.

In the blade base 7 of the spare blade, slits 19,
19, two journal bearings 5, 5 are formed near the center thereof. The slit 19 is a passage for passing the journal shafts 3 and 3. The journal bearings 5 and 5 are formed with inclined surfaces 18 and 18 and cooperate with the inclined surfaces 17 and 17 formed outside the ends of the journal shafts 3 and 3 as described above. -Null shafts 3 and 3 are jars
When pressed against the null bearings 5, 5, the arms 2, 2
Acts to open naturally. Journal axes 3 and 3 are journals
When reaching the positions of the journal bearings 6, 6, the journal shafts 3, 3 are inserted into the journal bearings 6, 6, and the arms 2, 3 are inserted.
2 is elastically closed naturally, so that the journal shafts 3 and 3 are automatically connected to the journal bearings 6 and 6 of the spare blade stored in the container, and the spare blade can be taken out of the container. .

The replacement blade 4 coupled to the holder 1 is in a state where it can swing about the swing axis. As shown in FIG.
When the replacement blade 4 is going to swing backward and downward, the projection 11 enters between the rear projections 14 of the replacement blade, so that the replacement blade 4
Can swing without being regulated. FIG. 2
As shown in (1), when the replacement blade 4 is about to swing forward and downward, the front projection 16 of the replacement blade enters the recess 9 between the overhang portions 15, 15, so that the replacement blade 4 is restricted. Can be swung without any movement.

The journal shafts 3, 3 are journal bearings 6,
The connection to reach the position 6 is limited only when the replacement blade 4 is attached in the forward direction of the holder 1 as shown in FIG. When the replacement blade 4 is to be mounted on the holder 1 in the reverse direction, as shown in FIG. 4, the projection 11 provided at the center of the holder is provided with a front projection provided at the center of the replacement blade. 16 contacts. Further, the rear projections 14, 14 provided on the spare blade abut on the overhang portions 15, 15 provided on the holder at intervals.
For this purpose, the journal shafts 3, 3 are connected to the journal bearings 6,
Since the movement is stopped before reaching 6, the coupling between the two is restricted. As a result, even if the user attempts to mount the blade 4 in the holder in the reverse direction, the two cannot be combined, so that the user can immediately recognize that the blade is in the reverse direction and mount the blade in the forward direction. it can.

In the drawing, there are two restricting portions for restricting the replacement blade 4 from being attached to the holder 1 in a reverse direction that cannot be used originally, and two restricting portions are provided at the front and one at the rear. If there is only one place, or if a plurality of restricting parts are aligned with either the front part or the rear part of the spare blade, the spare blade swings to one side even in the opposite direction and is connected to the holder-1. This is inconvenient. Also, in the case of two places before and after, one regulating portion is on the right side and the other regulating portion is on the left side with respect to the center of the blade, but the journal shafts 3, 3 and the journal bearings 6, 6, there is a possibility that the spare blade 4 is coupled to the holder in a slightly oblique state. In the drawing, there are two regulating parts at the front part and one part at the rear part, but it is also possible to have one part at the front part and two parts at the rear part instead.

[Brief description of the drawings]

FIG. 1 is a partial side view of the upper part of the present invention.

FIG. 2 is a partial side view of the upper part of the present invention.

FIG. 3 is a partial perspective view of the upper part of the present invention when the blade is to be mounted in the forward direction.

FIG. 4 is a partial perspective view of the upper part of the present invention when the blade is to be mounted in the opposite direction.

FIG. 5 is a rear view of the blade.

FIG. 6 is a bottom view of the blade.

FIG. 7 is a front view of a spare blade.

FIG. 8 is a side view of a spare blade.

FIG. 9 is a rear view of the holder.

FIG. 10 is a partial front view of the upper part of the holder.

FIG. 11 is a partial top view showing the top of the holder with the arm removed;

FIG. 12 is a side view of the holder.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Holder 2 Arm 3 Journal shaft 4 Spare blade 5 Journal bearing part 6 Journal bearing 7 Blade base 8 Top front part of top 9 Depression 10 Top rear part of top 11 Convex part 12 Push button 13 Top Plate 14 Rear projection 15 Overhang 16 Front projection 17 Inclined surface 18 Inclined surface 19 Slit

Claims (2)

(57) [Claims] 1. A pair of arms (2, 2) are movably mounted on the top of a holder (1), and the arms (2, 2) are provided.
A journal axis (3, 3) is provided at the tip of the arm, and the arm (2, 2) moves after changing the interval of the journal axis (3, 3). The journal bearing (6, 6) is formed on the back surface of the blade base (7) of the spare blade, and the journal bearing (6, 6) is formed.
6) and the journal shafts (3, 3) are coupled, so that the spare blade (4) can be attached to the holder (1) so as to be swingable about the journal axis. In the razor, the replacement blade (4) moves in the opposite direction to the holder (1),
That is, when the replacement blade (4) is to be mounted so as to face in the direction opposite to the forward direction, which is the normal mounting direction, the journal shaft (3, 3) of the holder becomes the journal of the replacement blade.
Before reaching the null bearings (6, 6), a protruding portion which is a reverse direction restricting portion provided on the blade base (7) of the spare blade and a reverse direction restricting portion provided on the top of the holder (1). Since the positions of the protruding portions coincide with each other, the two protruding portions abut to stop the movement of the journal shafts (3, 3), restricting the connection with the journal bearings (6, 6), Spare blade (4) is holder
When mounted in the forward direction in (1), since the positions of the protruding portion of the blade base (7) and the protruding portion of the holder (1) do not match, the two protruding portions do not abut, and the restriction is released. Then, the spare blade (4) is swingably mounted on the holder,
There are three protruding portions which are reverse direction regulating portions provided between the blade base (7) and the holder (1), and one of them is provided at a central portion with respect to a lateral position. , The position in the front-rear direction is one of them, and the other two positions are provided on both sides of the central portion in the horizontal direction, and the position in the front-rear direction is different from the one reverse regulation portion. Replaceable blade-type safety razor 2. A recess (9) is provided at the center of a front portion (8) of the upper surface of the holder, and by providing the recess (9), overhangs (15, 15) are formed on both sides thereof. A protrusion (11) is formed upward at the center of the upper surface rear portion (10) of the holder, and two rear protrusions (14, 14) are provided at the rear rear portion of the blade base (7) of the replacement blade. (1
The front projection (16) is provided integrally at a center of the front surface of the back surface of the blade base (7), and is provided integrally with a space substantially equal to the space of (5, 15). Replaceable blade safety razor