JPS61240989A - Blade of electric razor - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Technical Field) The present invention relates to an electric shaver blade for shaving beards and the like.

(Background Art) In the blades of the conventional electric shaver 9, various improvements have been made to the outer blades to make it easier to catch long hair. For example, as in Japanese Patent Application Laid-Open No. 56-27280, a concave bent strip is set close to the outer peripheral edge of the curved surface of the outer cutter, and a slit-shaped continuous part is formed on both walls and the peripheral wall of the concave bent strip. A plurality of inner blades in which long hair introduction holes are arranged in a ring shape and have notches t at positions corresponding to the grooves are disposed on the inner surface side of the outer blade, and the inner blades of the grooves and the notches are connected to each other. There is a slight gap between them.

When using the above-mentioned blade, as shown in Figures 6 to 8, the long 3-dimensional slit-shaped beard introduction hole that continues from the side wall opening to the upper surface of the outer blade A will not allow the hair H to pass through. It is introduced diagonally and driven to the part where the cutting edge of the inner blade 2 is located and is cut. At this time, since the beard introduction hole C has a long slit shape, there is a drawback that the hair H is cut diagonally and the hair H is not cut short.

In addition, the length of the hair H captured by the small round hole introduction hole H is 3 when the hair H is not cut diagonally and is much longer than the length t of Marugame. Becomes shorter.

However, in order to cut long hair Ht-introduction, a blade hole shaped like a slit-like long hair introduction hole H is required.
This Japanese cypress razor blade had the drawback of having a mixture of holes that were too short to finish.

In addition, the cutting edge is separated into an outer cutting edge and an inner cutting edge by the notch provided near the outside of the inner blade. It also has the disadvantage that its strength is extremely lower than that of the peripheral cutting edge C, and if force such as the cutting resistance of hair H is applied frequently, the peripheral cutting edge C will deform and even break. .

(Object of the Invention) The present invention was proposed in view of the above-mentioned drawbacks, and its purpose is to provide an electric shaver blade that can efficiently introduce long hair and cut it into short lengths. It is.

(Disclosure of the Invention) The present invention will be described below with reference to the drawings. 1 and 2 show a first embodiment of the present invention, in which a motor 2 is installed inside a main body 1 of an electric shaver, and an inner cutter frame 3'f is attached to the motor shaft 2a. : The joint 4 for rotation is press-fitted and fixed. Inner cutter blades 6 are attached to the inner cutter frame 3 via push-up springs 5t, and are attached by an outer cutter frame 7 and an outer cutter frame 8, and a plurality of said inner cutter blades 6 are in sliding contact with a companion outer cutter 9. These outer blades 9. The inner blade 6 constitutes the blade portion of the electric shaver.

1+, the outer cutter 9 is provided with a concave bent strip 9a close to the outer periphery, and a long first barb in the form of a slit continuous to the upper surface is introduced into both walls and the peripheral wall of the bent strip 9a. The holes 9b are arranged in an annular row, and the nib of the hair introduction hole 9b also has a second hair introduction hole 9C, which is shorter in length, provided in its inner part.
In addition, a concentric notch 6a is provided in the inner blade 6 at a position corresponding to the concave bent strip 9a,
In addition, the outer peripheral end of the cutting edge 6b is folded back into a U-shape, and the cutting edge 6c is folded into the cutting edge so that it is doubled and substantially parallel to the rotational direction of the inner cutter. 6b, and includes a first inner blade formed in front of the double cutting edge part 6.
b, 6c are in sliding contact with the lower surface of the outer periphery of the outer cutter 9 at the same time.
It forms a single blade. Thus, the inner blade 6, which is in sliding contact with the inner surface of the outer cutter 9, has a two-blade first cutting edge 6b, 6c on the outer periphery, and a first cutting edge 6a, which is connected to the inner periphery through a notch 6at. 3(A), Oo) and FIG. 4 show a second embodiment of the present invention. In this example, an improved tube is added to the outer cutting edge of the inner blade 6 of the first embodiment, and the outer cutting edge is folded back inward to form a double outer cutting edge as in the first embodiment. 6b, 6e are formed and 2
A reinforcing rib 6df is formed on the outer circumferential cutting edge 6b, which is located at the rear with respect to the inner cutter moving direction XVc, at a position abutting against the back surface of the front outer circumferential cutting edge 6C. At this time, when cutting the hair Ht- at the outer peripheral cutting edge, the cutting resistance Ft- of the hair H is received at the cutting edge 6C, but at this time, the reinforcing rib 6dK! It also becomes possible to accept cutting resistance.

As described above, the inner blade corresponding to the long slit-shaped whisker introduction hole 9b is folded back and doubled, and the cutting edge portion is formed into two blades in parallel with each other, and the two blades are closely superposed. 4
As shown in the figure, the long hairs H are drawn in by the front cutting blade 6c, and the rear cutting blade 6b can cut the nine hairs from their roots, making it possible to finish the shave with a short length.

In addition, by bending the cutting blade and making it double, the strength is increased and there is no fear of deformation or damage even if the cutting resistance of the hair H is applied.As shown in FIG. By providing a reinforcing rib 6dt which comes into contact with the back surface of the front cutting edge portion 6C, the strength of the cutting edge is further increased, and the cutting edge will not be deformed or damaged for a long time, resulting in an electric razor blade with good sharpness. can be provided.

Note that, as shown in FIG. 5, not only the long slit-like hair introduction hole 9 which is three-dimensionally long from the side wall of the outer cutter to the top surface, but also the long slit-like hair introduction hole 9 on the curved surface of the outer cutter 9, as shown in FIG.
In the inner blade 6 corresponding to d, the end portion of the inner blade 6 is folded back as in the above embodiment to form a cutting edge portion 6k)+6.
Exactly the same effect can be obtained by configuring two substantially parallel cutting blades consisting of double e.

In each of the above embodiments, the blade of a rotary electric shaver has been described, but the present invention can also be applied to a blade of a reciprocating electric shaver in which an inner blade reciprocates in sliding contact with the inner surface of an outer blade. Of course.

(Effects of the Invention) According to the present invention configured as described above, the outer blade has a long groove-shaped first whisker introduction hole, a second whisker introduction hole shorter in length than the whisker introduction hole; an inner cutter blade that slides into contact with the inner surface of the outer cutter, the cutting edge portion of the inner cutter blade facing the first whisker introduction hole is made up of a plurality of closely superposed first inner cutter blades; It has the advantage that long hair can be cut from the root to make it shorter, and the strength of the cutting blade is improved, preventing deformation and breakage even when the hair is subjected to cutting resistance.

Furthermore, the strength can be further improved by providing reinforcing ribs on the cutting edge.

[Brief explanation of drawings]

Fig. 1 is a sectional view of the blade head of a rotary electric shaver according to the first embodiment of the present invention, Fig. 2 is a perspective view of the inner cutter blade of the same as above, and Fig. 3 (0) is a sectional view of the blade head of the rotary electric shaver according to the second embodiment of the present invention. A perspective view of the inner blade, ←) is a sectional view taken along the line A-A, FIG. 4 is a hair cutting state of an electric shaver according to an embodiment of the present invention, and FIG. 5 is a second embodiment of the present invention. Figure 6 is a partial view of the outer and inner blades of the above, Figure 6 is the inner blade of a conventional electric shaver, Figure 7 is a sectional view of the blade head of the same, and Figure 8 is a diagram of the hair cutting state of the same. .

Claims (3)

[Claims] (1) An outer blade having a first hair introduction hole in the form of a long groove and a second hair introduction hole shorter than the hair introduction hole, and an inner blade that slides into contact with the inner surface of the outer blade, The cutting edge portion of the inner blade facing the first hair introduction hole is an electric shaver blade made of a plurality of first inner blades that are closely superposed. (2) The electric shaver blade according to claim 1, wherein the first inner blade is integrally formed with the second inner blade facing the second hair introduction hole of the outer cutter. (3) The electric shaver blade according to claim 1, wherein the inner blade is in rotational and sliding contact with the inner surface of the outer blade, and a reinforcing rib is provided protruding from the cutting edge portion located rearward in the direction of rotation.