JPS6225393B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an outer blade of an electric shaver in which the inner blade makes rotating sliding contact or reciprocating sliding contact and cuts hair introduced from a hair introduction hole.

As shown in Figure 10, the outer blades of conventional electric razors can cut long beards and curly hair without cutting the skin with the inner blades, and can cut beards efficiently by expanding the area where the outer blades introduce the beard. Therefore, the central part of the outer cutter A has a long hole-like beard in which the inner cutter passes through a part of the bead introduction hole on the outer periphery, and there are areas where the inner cutter makes sliding contact and areas where the inner cutter does not make sliding contact. The introduction holes are formed by an outer blade crosspiece, and the edges around the entire circumference of these hair introduction holes are sharply formed to cut the hair, and the hair that enters the hair introduction holes is cut by the edge. There was a problem that if it got stuck, it would cause irritation when shaving.

The present invention has been made in view of the above-mentioned problems, and its purpose is to provide an outer blade for an electric shaver that is less irritating.

Hereinafter, the present invention will be explained in detail based on examples. In FIGS. 1 and 2, the outer cutter 1 is formed into a dome shape, and the edge of the peripheral wall 2 is fixed to the outer cutter base 3. As shown in FIGS. In the center of the outer cutter 1, a plurality of small first beard introduction holes 5 are formed by an outer cutter crosspiece 6 and have a step 4 on the side wall for stretching the skin and shaving the beard short. A plurality of second beard introduction holes 7 in the form of three-dimensional slits that are long in the radial direction and continuous to the peripheral wall 2 are formed on the outer circumference of the outer cutter 6 to introduce long beards or curly hair. An annular groove 8 is formed on the outer surface of the outer cutter 1 adjacent to the outer cutter 1. In order to introduce long beards and curly hair into the concave groove 8, a plurality of three-dimensional slit-shaped third hair introduction holes 9, which are long in the radial direction of the outer cutter 1 and continuous with the outer surface of the outer cutter 1, are formed by the outer cutter 6. has been done. An inner cutter 11 having a notch 10 corresponding to the groove 8 is in sliding contact with the inner surface of the outer cutter 1. The inner cutter 11 passes through a part of the whisker introduction hole 7, and the third
The edge 12 of the notch 10 is located at an intermediate position of the third whisker introduction hole 9, so that the inner cutter 11 passes through a part of the third whisker introduction hole 9. The outer cutter crosspiece 6 forming the second whisker introduction hole 7 and the third whisker introduction hole 9 is a portion 1 located in the area M where the inner cutter 11 slides.
3 and a portion 14 located in a region N where the inner cutter 11 does not come into sliding contact, and a region M where the inner cutter 11 comes into sliding contact with the second hair introduction hole 7 and the third hair introduction hole 9.
and a region N where the inner cutter 11 does not make sliding contact. Second whisker introduction hole 7 and third whisker introduction hole 9
Outer cutter crosspiece 6 in area N where inner cutter 11 does not make sliding contact
is formed to protrude in an arc shape so that the width of the inner cutter side surface is smaller than the width of the middle part of the outer cutter crosspiece 6 in the thickness direction. A recess 16 is formed in the center of the inner surface of the outer cutter crosspiece 6 to resist sliding contact with the inner cutter 11.

Next, a method for manufacturing the outer cutter 1 will be explained with reference to FIGS. 3 to 5. A deep first recess 17 is formed in the region M where the inner cutter 11 slides by compressing the hardened steel strip A, which is the material of the outer cutter 1, using a press machine.
A second recess 20 having a shallow recess 18 and a deep recess 19 is formed in the region N where the second recess 1 does not come into sliding contact. Thereafter, as shown by the dashed line, polishing is performed to the vicinity of the shallow recess 17 to form a first opening 22 having a sharp edge 21 and a second opening 24 having a tongue 23 projecting inward. do. After that, the rubber 2 is inserted from above the first opening 22 and the second opening 24.
5 to bend the tongue piece 23 to make the width of the inner cutter side surface of the outer cutter crosspiece 6 smaller than the width of the middle part of the outer cutter crosspiece 6 in the thickness direction, and also to bend the tongue piece 23 at the end of the first opening 22. The tongue piece 23 is made to protrude beyond the edge, the first opening 22 becomes the first whisker introduction hole 5, and the second opening 24 becomes the second opening 7 and the third opening 9.
It becomes.

Next, the operating state will be explained with reference to FIGS. 6 to 8. Since the edge of the outer cutter bar 6 in the area M where the inner cutter 11 slides is sharp, as shown in FIGS. The stepped portion 4 can make the skin (a) tense, raise the beard (b), push it out of the pores, and cut it short. Since the width of the inner blade side surface of the outer cutter crosspiece 6 in the area N where the inner cutter 11 does not make sliding contact is made smaller than the width of the middle part of the outer cutter crosspiece 6 in the thickness direction, the whiskers b
is less likely to get caught on the edge of the outer cutter crosspiece 6, and the eighth
As shown in the figure, even if the tip of the beard b enters another beard introduction hole 7, it will not get caught and will be smoothly pulled back following the movement of the skin a, forming an area M where the inner cutter 11 comes into sliding contact. The beard is cut at the edge of the outer cutter bar 6.

Next, another embodiment of the present invention will be described with reference to FIG. The side wall of the outer cutter crosspiece 26 is shaped into an arc so that the width of the inner cutter side surface of the outer cutter crosspiece 26 in the area N where the inner cutter does not make sliding contact is smaller than the width of the middle part of the outer cutter crosspiece 26 in the thickness direction. Since it is bent, the beard b is less likely to get caught on the edge of the outer cutter crosspiece 26, and even if the tip of the beard b enters another beard introduction hole 27, it can follow the movement of the skin without getting caught. Outer cutter 6 in area M that is pulled back smoothly and where the inner cutter makes sliding contact
The beard b is cut off at the edge.

As described above, the outer cutter of the electric shaver according to the present invention has a region where the inner cutter passes through a part of the hair introduction hole formed in the outer cutter and comes into sliding contact with the inner cutter, and a region where the inner cutter does not make sliding contact. In the outer blade of an electric shaver in which the hair introduction holes are formed by the outer cutter crosspiece, the width of the inner blade side surface of the outer cutter crosspiece in the area where the inner blade does not make sliding contact is the width of the middle part of the outer cutter crosspiece in the thickness direction. Since the beard that enters the beard introduction hole is cut by the inner blade without being pulled by the edge of the outer cutter, there is no irritation when shaving. It has the effect of allowing you to shave comfortably.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional view of the inner cutter incorporated into the outer cutter of an electric shaver, Fig. 2 is a partially cutaway perspective view of the same as above, Fig. 3 to Fig. 5 are cross-sectional views showing the manufacturing method of the outer cutter; 6 to 8 are cross-sectional views showing operating states, and FIGS. 6 and 7 are P--
P sectional view, FIG. 8 is a Q-Q sectional view in FIG. 2, FIG. 9 is a sectional view corresponding to FIG. 8 in another embodiment, and FIG. 10 is a sectional view corresponding to FIG. 8 in the conventional example. It is a diagram. 6, 26... Outer cutter crosspiece, 11... Inner cutter, M... Area where the inner cutter makes sliding contact, N... Area where the inner cutter does not make sliding contact.

Claims (1)

[Claims] 1. An electric shaver in which the inner cutter passes through a part of the cutter introduction hole formed in the outer cutter, and the inner cutter has a region in which the inner cutter makes sliding contact and a region in which the inner cutter does not make sliding contact. An outer blade of an electric shaver, characterized in that, in the outer cutter, the width of the inner blade side surface of the outer cutter crosspiece in the area where the inner cutter does not make sliding contact is smaller than the width of the middle part of the outer cutter crosspiece in the thickness direction. .