JPS5977883A - Outer 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 The present invention relates to an outer blade of an electric shaver in which a movable blade makes rotating sliding contact or reciprocating sliding contact and cuts hair introduced from a hair introduction hole.

The outer blade of a conventional electric razor consists of a part where the outer cutter, which forms a plurality of hair introduction holes, comes into sliding contact with the movable blade and a part where it does not come into sliding contact with the movable blade, as shown in Figure 10. In order to cut long beards and curly hair, the movable blade is on the side where the movable blade makes sliding contact with the center or outer periphery of the outer cutter (b), and the movable blade does not come into sliding contact with the outer cutter (b). In order to form elongated whisker introduction holes e) and to widen the whisker introduction area of the outer cutter (B), the surface side where the movable blade slides into contact with the center or outer circumference of the outer cutter (B) is used. The movable blade forms a hair introduction hole 9 with a groove that does not make sliding contact with the outer cutter (1), but the edge ring around the entire circumference of those two sink introduction holes cuts the hair. Therefore, there is a problem that if the hair that has entered the sink introduction hole ti gets caught on the edge, it will cause irritation during shaving.

The present invention has been provided in view of the above-mentioned problems, and includes:
The purpose is to provide an electric razor outer blade that is less irritating.

Hereinafter, the present invention will be explained in detail based on examples. In FIGS. 1 and 2, the outer blade l is formed in a dome shape,
An edge of the peripheral wall 2 is fixed to an outer cutter base 3. There is a stepped part 4 in the center of the outer blade l for stretching the skin and shaving short.
The first whisker introduction hole 5 in the form of a small hole in the side wall is connected to the outer cutter 6.
In order to introduce long beards and curly hair, a plurality of radially long second beard introduction holes 7 (continuous to the peripheral wall 2) are formed by the outer blade crosspiece 6. An annular groove 8 is formed on the outer surface of the outer cutter 1 near the outer periphery.A single groove 8 is formed in the outer surface of the outer cutter 1 in order to introduce long beards and curly hair. Blade 1
A movable blade 11 having a notch 10 corresponding to the groove 8 is in sliding contact with the inner surface of the movable blade 11 . An edge 12 of a notch 10 is located in the middle of the sink introduction hole 9, and the outer cutter crosspiece 6 is formed of a portion 13 that comes into sliding contact with the movable blade 11 and a portion 14 that does not come into sliding contact with the movable blade 11. In the second beard introduction hole 7 and the third beard introduction hole 9, the outer cutter crosspiece 6 that does not come into sliding contact with the movable blade 11 protrudes toward the movable blade 11 side beyond the surface 15 that comes into sliding contact with the movable blade 11. The protruding portion is formed in an arc shape. A recess 16 is formed in the center of the inner surface of the outer cutter crosspiece 6 in order to reduce sliding resistance with the movable cutter 1.

Next, a method for manufacturing the outer cutter 1 will be explained with reference to FIGS. 3 to 5. A hardened steel strip A, which is the material of the outer cutter 1, is compressed using a press machine to form a deep first recess 17 and a second recess 20 having a shallow recess 8 and a deep recess 19. 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. Thereafter, the tongue piece 23 is bent by pressing with the rubber 25 from above the opening 22.24, so that the tongue piece 23 protrudes beyond the edge of the first opening 22. The first sink introduction hole 5 becomes the sink mark introduction hole 5, and the second opening 24 becomes the second whisker introduction hole 7 and the third whisker introduction hole 9. Next, the operating state will be described with reference to FIGS. 6 and 7, which are cross-sections taken along PP in FIG. 2, and FIG. 8, which is a cross-section taken along QQ in FIG. Since the edge of the outer cutter crosspiece 6 that the movable blade 11 comes into sliding contact with is sharp, as shown in FIGS. 6 and 7,
The sink mark (b) is cut by the movable blade 11 and the edge of the outer cutter frame 6, and the stepped portion 4 can tension the skin (a), raise the beard (b) and push it out of the pores. It can be cut short. The edge of the outer cutter crosspiece 6 on which the movable blade 11 does not come into sliding contact is protruding, so that the edge <b>
is caught on the edge (and as shown in Figure 8, even if the tip of the beard (b) is inserted into another beard introduction hole, it is not caught and pulled back smoothly following the movement of the skin). The whisker (b) is cut at the edge of the outer cutting crosspiece 6 that the movable crab 1 slides against.

FIG. 9 shows another embodiment of the present invention, in which an outer cutter crosspiece 26 with which the movable blade does not come into sliding contact is an outer cutter crosspiece 26 with which the movable blade comes into sliding contact.
It protrudes beyond the surface of the outer cutter 26 and is bent into an arc shape on the inside of the outer cutter 26. Since the side surface of the outer cutter 26 is arcuate, it is difficult to get caught in the beard (b).
) even if it enters another hair introduction hole 27, it will not get caught and will be smoothly pulled back following the movement of the skin.

As described above, the outer cutter of the electric shaver according to the present invention has a movable outer cutter including a portion in which the outer cutter crosspiece forming the plurality of hair introduction holes is in sliding contact with the movable blade and a portion in which the outer cutter is not in sliding contact with the movable blade. The outer cutter crosspiece, which is on the side of the surface where the blade comes into sliding contact and where the movable blade does not come into sliding contact with the outer cutter crosspiece, is made to protrude beyond the surface where the movable blade comes into sliding contact, so that it does not fit into the whisker introduction hole. Since the beard is cut by the movable blade without being pulled by the edge of the outer cutter, there is no irritation when shaving (this has the effect of allowing a comfortable shave).

[Brief explanation of drawings]

Fig. 1 is a sectional view of the outer blade of an electric shaver incorporating a movable blade, Fig. 2 is a partially cutaway perspective view of the same as above, and Figs. 3 to 5 are sectional views showing the method of manufacturing the outer blade. FIGS. 6 to 8 are cross-sectional views showing operating states, and FIG.
FIG. 10 is a cross-sectional view corresponding to FIG. 8 in the conventional example. 6.26... Outer blade crosspiece, 11... Movable blade, 15...
The surface that the movable blade comes into sliding contact with. Patent applicant Matsushita Electric Works Co., Ltd. Patent attorney Sanmaru Takemoto (and 2 others) 3M Figure 4 4 Figure 5 Figure 6 1 Figure 7 gFiA

Claims (1)

[Claims] In the outer blade of an electric shaver, the outer cutter, which forms a plurality of hair introduction holes, is composed of a portion in sliding contact with the movable blade and a portion in non-sliding contact with the movable blade, and the movable blade is on the surface side in sliding contact with the movable blade, and the movable blade is the outer blade. An outer cutter for an electric shaver, characterized in that an outer cutter that does not come into sliding contact with the cutter is made to protrude beyond the surface that the movable blade comes into sliding contact with.