JPS6040871B2 - Manufacturing method for the outer blade of a rotary electric razor - Google Patents

Description

[Detailed description of the invention] The present invention relates to a method for manufacturing an outer blade for a rotary electric razor.

Conventionally, in this type of rotary electric razor, as shown in FIGS. 3 to 5, an inner cutter stand 11 is attached to a rotating shaft 1 driven by a motor, and an outer cutter frame 1 is attached to a main body 12.
The inner cutter 15 is supported on the inner cutter base 11 so as to slide on the inner surface of the outer cutter 14 supported through the outer cutter 14. In particular, the outer cutter 14 is shown in enlarged form in FIGS. 6a and 6b. For one whisker introduction hole 1', a cutting edge surface 5' is formed so as to extend over said whisker introduction hole 1'. Therefore, when the inner cutter 15 rotates in the direction of arrow A' on the inner surface of the outer cutter 14, the inner cutter 15
The blade comes into contact with the cutting edge surface 5' around the whisker introduction hole I', which increases the load applied to the inner blade 15, requiring a large load current and shortening the battery life. was. Inevitably, the inner blade was also severely worn out. The present invention has focused on the fact that if the cutting edge face exists only in the direction perpendicular to the direction of rotation of the inner blade, it will function satisfactorily as an outer cutter, and the above-mentioned drawbacks can be eliminated and the load current can be reduced. The present invention aims to provide a method for manufacturing the outer blade of an electric razor that prevents wear of the inner blade.

The invention will be explained below with reference to the drawings.

In the present invention, the outer cutter is provided with a large number of hair introduction holes 1, as shown enlarged in FIGS.

Further, the curved edge 2 is provided so as to be located above and away from the sliding position X with the inner cutter, and the cutting edge 4 is provided only at the straight edge 3 that is substantially perpendicular to the rotational direction A of the inner cutter. It extends to the sliding position X with the inner cutter, and the cutting edge surface 5 facing the inner cutter faces downward. In manufacturing the above outer cutter, the second
As shown in Figure a, the outer cutter material is provided with a scale break line 6 so as to form a green part excluding the green part that forms a straight line substantially perpendicular to the rotational direction A of the inner cutter among the periphery that partitions the hair introduction hole. put in.

Next, as shown in FIG. 2b, the tongue piece 7 inside the trout wire 6 is bent toward the inner surface of the outer blade, and the tongue piece 7 is further bent so that it has a suitable sink height, that is, the tongue piece 7 is bent inside the inner surface of the outer blade. Cut along the Y-Y line in Figure 2b so that the blade can slide smoothly,
As shown in FIG. 2c, a downward cutting surface 5 facing the inner cutter as well as the hair introduction hole 1 is formed. However, since the outer cutter manufactured according to the present invention has a cutting edge surface 5 having a sufficient length in the direction perpendicular to the rotational direction of the inner cutter, the cutting quality is not impaired, and the inner cutter is not damaged. Only the cutting edge surface 5 substantially perpendicular to the direction of rotation A comes into contact with the inner cutter, and the contact area of the outer cutter with the inner cutter is greatly reduced.

According to the present invention configured as described above, since the contact area between the outer cutter and the inner cutter can be greatly reduced, the load current can be reduced and the battery life can be extended. It achieves remarkable effects such as being able to provide an outer cutter with reduced wear and tear.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1a is a partially enlarged sectional view of the outer blade of the rotary electric razor manufactured by the present invention, b is an enlarged bottom view of the same part, and Figs. 2a, b, and c are views of the same manufacturing method. Explanatory diagram,
Fig. 3 is a partial perspective view of a rotary electric razor, Fig. 4 is a partial sectional view, Fig. 5 is a plan view of the outer part, and Fig. 6a is a partial enlarged sectional view of the outer blade of a conventional rotary electric razor. , b are bottom views of the same.

1... Mustache introduction hole, 2... Curved green, 3... Straight edge,
4... Cutting edge portion, 5... Cutting edge surface.

Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6

Claims (1)

[Scope of Claims] 1. A shear line is inserted into the outer blade material so as to form an edge portion excluding an edge substantially perpendicular to the rotational direction of the inner blade among the peripheral edges that partition the hair introduction hole, and the shear line is A method for manufacturing an outer blade for a rotary electric razor, characterized in that the inner tongue is bent toward the inner surface of the outer blade, and the tongue is cut to form a cutting surface facing the inner blade. 2. The rotary electric razor according to claim 1, wherein the shear line forms a semi-elliptical beard introduction hole, and is inserted in a semi-ellipse so that a part of the periphery of the beard introduction hole becomes a straight edge. Manufacturing method for outer blades.