JPS5841868B2 - Denki Razorinosotoba - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a through-hole pattern for introducing the hairs of the outer blade of a reciprocating electric razor in which the inner blade reciprocates to cut the hairs between the inner blade and the outer blade.

A conventional reciprocating electric razor has a main body 1 with a built-in drive mechanism as shown in FIG. 1, and an inner blade 2 that protrudes from the top so as to reciprocate, and a round through hole 3 as shown in FIG. 2. Since a large number of outer blades 4 are attached to each other and the hairs are cut between the inner blade 2 and the outer blade 4, the opening ratio of the through hole is low and it is difficult to introduce long hairs, resulting in poor cutting efficiency. It is known that the opening ratio is increased by continuously arranging the blade's through-holes (hair introduction holes) in an oval, diamond, hexagon, oblong, rectangular, etc. pattern. The holes are directional, making them unsuitable for cutting long beards.

In view of these points, the present invention, as shown in FIGS. 3 and 4, alternates between an hourglass-shaped through hole a and a parallelogram-shaped through hole with left and right inclination angles a1 and 32 being constant angles in a thin metal plate e. The disadvantages of the conventional example are overcome by combining the inner cutter with the outer cutter E and arranging the outer cutter E in different directions in each row so that the left and right inclination angle δ is constant with respect to the reciprocating direction P of the inner cutter. It was designed to resolve this issue.

The left and right inclination angle δ with respect to the reciprocating direction of the inner cutter is approximately 700
In addition, the holes are arranged so that the width of the rib 1 between the hourglass-shaped hole a and the parallelogram-shaped hole is constant everywhere.

g is a hole provided at the longitudinal end of the outer cutter E to which the outer cutter frame is attached.

Since the outer cutter according to the present invention has the above-mentioned pattern, it has a mixture of hourglass-shaped holes and parallelogram holes, and short hairs are captured by the diamond-shaped holes and long hairs are captured by the hourglass-shaped holes. In addition to brushing the beard where some parts have poor napping properties, it is possible to shave both long and short beards quickly. Since the blade is arranged so that the left and right inclination angles are constant with respect to the direction of reciprocating movement, the rib width is constant in all parts, resulting in a high opening ratio. This also has the effect of providing an outer blade with a high rate of beard replenishment.

[Brief explanation of drawings]

Fig. 1 is a partially cutaway perspective view showing a conventional reciprocating electric razor; Fig. 2 is a plan view showing a conventional outer blade pattern;
FIG. 3 is a plan view showing an embodiment of the present invention, and FIG. 4 is an enlarged plan view of the same. Explanation of symbols for main parts: Row quadrilateral through hole, E is outer blade. A is a drum-shaped sender and b is a flat one.

Claims (1)

[Claims] 1. Alternate combination of hourglass-shaped through holes and parallelogram-shaped through holes. The outer blade of an electric razor is characterized in that the drum-shaped holes are arranged in different directions in each row so that the left and right inclination angles of the drum-shaped holes are constant with respect to the reciprocating movement of the inner blade.