JPS5841870B2 - electric razor outer blade - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION An object of the present invention is to enhance the cutting effect of hairs at a portion other than the contact surface between the outer blade of an electric razor and the skin, and to facilitate the cutting of long hairs in particular. It is something to do.

With electric razors, the hair is usually introduced into the hole in the outer blade at the contact surface between the outer blade and the skin and cut between the inner blade and the outer blade. In many cases, the beard enters the cutter hole of the outer cutter and is cut off at a point other than the surface where it comes in contact with the skin, and then is cut again shorter at the point where the skin and the outer cutter come into contact.

If a long beard is not cut at a point other than the contact surface between the outer cutter and the skin, the beard will lie horizontally between the outer cutter and the skin and the outer cutter's blade hole will be cut. Therefore, as mentioned above, it is important to cut once at a point other than the contact surface between the outer cutter and the skin.

Furthermore, if the cutter hole of the outer cutter is made larger in order to improve the introduction of the whiskers, the skin will protrude inward from the cutter hole of the outer cutter and become easily damaged, which is not preferable.

The present invention introduces long beards at areas other than the contact surface between the outer cutter and the skin by changing the radius of curvature of the introduction groove of the cutter hole from the center of the curved surface of the outer cutter in contact with the skin to the outside. This increases the efficiency and cuts the beard at this point to increase the efficiency of introducing the beard at the contact surface between the outer blade and the skin, increasing the beard cutting effect without making the blade hole too large. .

FIG. 1 is an external perspective view of an electric shaver of the present invention, and FIG. 2 is a cross-sectional view taken along line A--A, showing essential parts of the present invention.

In these figures, 1 is the main body of the electric shaver, 2 is a switch, 3 is a blade frame, 4 is an inner blade, and 5 is an outer blade. The outer blade 5 has many blade holes 6 and is curved in a semicircle. A plurality of inner cutters 4 inscribed in this and lined up at regular intervals in the direction of arrow B in FIG. The beard introduced through the hole 6 is cut by the inner cutter 4.

FIG. 3 shows a top view a and a cross-sectional view of a part of the outer cutter 5 of the present invention in an expanded state.

Reference numeral 6 indicates a cutter hole provided in the outer cutter 5, and 7 indicates a bevel introduction groove around the cutter hole 6.

In the present invention, the curved outer cutter 5 contacts the skin at the center (X
–
As shown in the enlarged figure, the radius of curvature of the introduction of the whiskers on the side far from the center of the outer blade is R1>R6>R7>R8>R.
In other words, the introduction slope of the whiskers is gradually gentler on the side closer to the center of the outer cutter and steeper on the far side.

In the present invention configured as described above, the introduction of the whiskers in the blade hole of the outer cutter becomes gentler on the side closer to the contact surface between the outer cutter and the skin and becomes steeper on the far side as the distance from the center of the blade increases. Therefore, as shown in FIG. 5, the long hair 9 easily enters the blade hole 6 of the outer cutter even in areas other than the contact area between the outer cutter 5 and the skin surface 8, and the long hair is temporarily cut in this area. Therefore, the contact surface between the outer blade and the skin allows for efficient introduction into the blade hole, making it possible to cut long hair into short pieces in a short time.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, Fig. 1 is an external perspective view of an electric shaver, and Fig. 2 is an A-A in Fig. 1 showing main parts of the invention.
3 is a developed view a and a sectional view b of a part of the outer cutter, FIG. 4 is an enlarged view of each part of FIG. 3, and FIG. 5 is an explanatory view of the operation of the present invention. 4...Inner blade, 5...Outer blade, 6...
...Blade hole, 7...Introduction of the beard, 8...
...Skin surface, 9...Beard.

Claims (1)

[Claims] 1. An electric cutter comprising a semicircularly curved outer cutter having a large number of cutting holes and a plurality of inner cutters inscribed in the outer cutter, and reciprocating the inner cutter parallel to the central axis of the semicircular outer cutter. In the razor,
As the cutter hole provided in the outer cutter becomes further away along the circumferential surface from the center of the outer cutter where the outer cutter contacts the skin surface, the introduction of the beard on the side of the cutter hole closer to the center of the outer cutter increases. The outer blade of an electric razor is characterized in that the radius of curvature of the outer blade is gradually made smaller, and the radius of curvature of the beard on the side farther from the center of the outer blade is gradually made smaller.