JP4874467B2 - Safety razor - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a so-called swing-type safety razor in which a razor head attached to a holder can swing around a swing axis extending in a lateral direction.
[0002]
[Prior art]
A conventional swing-type safety razor is provided with an inward journal arm at the tip of an arm attached to the upper end of a handle as disclosed in, for example, Japanese Patent Publication No. 7-20512. -The replaceable blade cartridge was swingably attached to the handle by journaling the journal bearing of the null arm and replaceable blade cartridge. The pusher extending from the upper end of the handle is pressed against the triangular cam surface on the bottom surface of the replaceable blade cartridge so that the swingable replaceable cartridge is automatically returned to its original position. It was.
[0003]
[Problems to be solved by the invention]
Since the configuration of the conventional swing-type safety razor is as described above, the number of parts is very large and the configuration is complicated and the cost is inevitably high as is apparent from the drawings of the publication.
[0004]
In addition, the conventional safety razor described above is not a structure in which the elastic force from the pusher is directly transmitted to the replacement blade cartridge as it is to return the oscillating replacement blade cartridge to its original position. By applying a component of vertical pressing force to the cam surface of the replaceable blade cartridge, a moment is given to the replaceable blade cartridge to return it to its original position. That is, the conventional safety razor converts the force from the pusher into a moment acting on the replaceable blade cartridge by interposing a transmission mechanism called a cam. Therefore, the force transmission from the pusher to the replaceable blade cartridge is not smooth and the force is lost due to the interposition of the cam mechanism, so that the replaceable blade cartridge is sufficiently swung during the use of the safety razor. It could not be said to be smooth.
[0005]
Accordingly, the present invention is intended to provide a structure in which the replaceable blade cartridge swings smoothly during use of a safety razor without being complicated in structure.
[0006]
[Means for Solving the Problems]
The invention of claim 1, wherein the holder - razor head attached to is swingable about a pivot axis extending in the transverse direction, the razor head so as to swing in the direction of anteversion of the razor head A means for elastically pressing the razor head is interposed between a portion of the razor head behind the swing axis and the holder, and the razor head swings forward so that the razor head swings forward. There are two means for elastically pressing the razor head so as to swing the razor head forward, and these two means act on two portions of the razor head. There are two safety razors, and there are two coupling means for attaching the razor head, spaced laterally at the upper end of the holder, and elastically presses the razor head so as to swing forward. Two Stage is a configuration provided laterally outward from the coupling means.
[0007]
According to a second aspect of the present invention, the means for elastically pressing the razor head so as to swing in the forward tilting direction is an elastic piece extending upward from the upper back of the holder and tilting forward.
[0008]
According to a third aspect of the present invention, the razor head attached to the holder is swingable about a swing axis extending in the lateral direction, and the razor head is elastically moved so as to swing in the forward tilt direction. The means for pressing the razor head is interposed between the portion of the razor head behind the swing axis and the holder, and the swing of the razor head so as to tilt forward is restricted at a certain swing angle position. And a means for elastically pressing the razor head so that the razor head swings in a forward tilting direction. The elastic razor extends upward from the upper back of the holder and tilts forward. It is the structure which is a piece.
[0009]
【Effect of the invention】
The present invention is configured as described above, and in claim 1, there are two means for elastically pressing the razor head so as to swing in the forward tilt direction, and these two means are the razor head. A safety razor acting on two parts, wherein there are two coupling means for attaching the razor head, spaced laterally at the upper end of the holder, and the razor head swings in a forward tilting direction. Thus, the two means for elastically pressing are provided on the outer side in the lateral direction than the coupling means . In other words, the force that elastically presses the razor head acts on the portion behind the swing axis of the razor head from the beginning. Therefore, the oscillating razor head can be returned to the original position by directly applying the elastic pressing force to the razor head without using a force transmission mechanism such as a cam. As a result, the way in which the force is transmitted is direct and smooth, and the loss of force is small, so that the razor head can be swung very smoothly during use. Further, two means for elastically pressing the razor head so as to swing in the forward tilt direction are provided laterally outside the means for connecting the razor head and the holder. Therefore, the pressing state of the razor head by the pressing means becomes stable, and it is possible to prevent useless shaking other than the shaking of the razor head.
[0010]
According to a second aspect of the present invention, the means for elastically pressing the razor head so as to swing in the forward tilting direction is an elastic piece extending upward from the upper back of the holder and tilting forward. Therefore, since the elastic pressing means is an elastic piece extending from the holder, the structure is very simple. Further, since there are two means for elastically pressing, the razor head can be stably pressed, so that the razor head can be more smoothly swung.
[0011]
According to a third aspect of the present invention, the means for elastically pressing the razor head so as to swing in the forward tilting direction is an elastic piece that extends upward from the upper back of the holder and tilts forward. Since the elastic piece is tilted forward, the elastic piece bends as a whole when a force is received from the razor head, and the reaction force acts directly on the razor head to give moment. Therefore, there is no loss of force, and the razor head can be swung very smoothly.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Next, embodiments of the present invention will be described with reference to the drawings. The holder-1 is made of plastic and has a pair of heads 2 and 2 on both sides of the upper end. Elastic pieces 7 and 7 integrally extend upward from the vicinity of both ends of the back surfaces of the heads 2 and 2, and the elastic pieces 7 and 7 are inclined slightly forward with respect to the back surfaces of the heads 2 and 2.
[0013]
Arms 3, 3 extending upward from the heads 2, 2 are integrally provided on the inner side surfaces of both heads 2, 2. Arms 3 and 3 are provided to hold the razor head 4, and inward journal shafts 5 and 5 are integrally provided at the upper ends of the arms 3 and 3. A journal bearing (not shown) is provided on the bottom surface of the razor head 4, and the journal shafts 5, 5 are journal-coupled so that the razor head 4 can swing in the holder 1. Combined with A line passing through the centers of the journal shafts 5 and 5 becomes the swing axis of the razor head 4. When the razor head 4 is coupled to the holder 1, the flexible arms 3 and 3 are opened slightly outward.
[0014]
When the razor head 4 is coupled to the holder 1, the elastic pieces 7, 7 are obliquely applied to the bottom surface behind the oscillating axis of the razor head 4 and are elastically pressed to cause the razor head 4 to move forward. Swing in the tilting direction. The place where the elastic pieces 7 and 7 are pressed is not limited to the bottom surface of the razor head. The bottom surface of the razor head is not all flat, and various recesses are formed. Therefore, when the concave portion is a quadrangle, the back surface of the elastic pieces 7 and 7 may be in pressure contact with the inner surfaces of the rear peripheral walls of the four peripheral walls surrounding the concave portion instead of the flat portion in the concave portion.
[0015]
Protruding stoppers 6 and 6 are integrally provided on the front surfaces of the arms 3 and 3. When the bottom surface of the razor head 4 coupled to the holder-1 hits the stoppers 6 and 6, the razor head 4 is restricted from swinging in the forward tilt direction. In a state where the swinging is restricted, the razor head 4 is applied with an elastic swinging force by the elastic piece 7 in a forward tilting direction. This state is a state before use. Accordingly, during use, the razor head 4 does not oscillate further in the forward tilting direction, but only in the backward tilting direction.
[Brief description of the drawings]
1 is a partial side view showing a use state of the present invention. FIG. 2 is a partial rear view of a holder according to the present invention. FIG. 3 is a partial side view of a holder according to the present invention.
1 Holder
2 Head 3 Arm 4 Razor head 5 Journal shaft 6 Stopper
7 Elastic pieces

Claims (5)

Means for elastically pressing the razor head so that the razor head attached to the holder is swingable about a swing axis extending in the lateral direction , and the razor head swings forward. Means provided between the portion of the razor head behind the swing axis and the holder, and means for restricting the razor head from swinging so as to tilt forward at a fixed swing angle. There are two means for elastically pressing the razor head so as to swing in the forward tilt direction, and the two means are safety razors that act on two portions of the razor head, and the razor head There are two coupling means for attaching the razor head to the upper end of the holder at a lateral interval, and the two means for elastically pressing the razor head to swing forward are more Also Safety razor, characterized in that provided in the outward. 2. The safety razor according to claim 1 , wherein the means for elastically pressing the razor head so as to swing in the forward tilt direction is an elastic piece extending upward from the upper back of the holder and tilting forward. Means for elastically pressing the razor head so that the razor head attached to the holder is swingable about a swing axis extending in the lateral direction, and the razor head swings forward. Means provided between the portion of the razor head behind the swing axis and the holder, and means for restricting the razor head from swinging so as to tilt forward at a fixed swing angle. The means for elastically pressing the razor head so as to swing the razor head in a forward tilt direction is an elastic piece extending upward from the upper back of the holder and tilting forward. A featured safety razor. The safety razor according to any one of claims 1 to 3, wherein the razor head is attached to the holder in a replaceable manner. The safety razor according to any one of claims 1 to 3, wherein the razor head is attached so as not to be detached from the holder.

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