JPS59101182A - Electric razor blade - 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] This invention relates to an electric shaver.

@Figures 1 to 5 show conventional reciprocating electric shavers. In the figure, reference numeral 2 denotes an outer cutter block 1, which is composed of an outer cutter 2 curved into a semi-cylindrical shape and an outer cutter frame 3. Reference numeral 4 denotes an inner cutter block, which is made up of a large number of arcuate inner cutter blades 5 attached to an inner cutter frame 6 in parallel. The inner cutter frame 6 is connected to a driving hand joint via an inner cutter attachment member 7, and is driven so that the inner cutter blade 5 slides back and forth along the inner surface of the outer cutter 2, as shown by arrow Q. Ru.

The inner cutter blade 5 has a flat plate shape, and when operating such an inner cutter blade 5, at the end of the inner cutter pro-tsuku 4, there is a skin 8 ('LjS5 diagram) on the -blade 2. When there is no deformation caused by pressing or the like, the state is as shown in FIG. In the vicinity of , it becomes as shown in Fig. 5.

That is, the outer cutter 2 is supported by the inner cutter blade 5 with the width of the amplitude a since the inner cutter blade 5 reciprocates at a fairly fast speed. However, the amplitude a is ITIa
Since it is less than R and not very wide, when external force is applied to the outer blade,
In particular, at the end of the inner cutter 4, the inner cutter blade 5 cannot fully support the outer cutter 2tl, and the outer cutter 2 deforms, as shown in FIG. When the outer cutter 2 is deformed, the inner cutter blade 5 collides with the inner cutter blade 5 due to the reciprocating motion, and the outer cutter 2 is damaged.

FIG. 6S and FIG. 7 show a conventional rotary electric cooker. In the figure, reference numeral 10 denotes a convex spherical outer cutter, which is housed in an outer cutter frame 17. 12 is an inner cutter blade, and a plurality of inner cutter frames 13iC are attached radially. The inner cutter frame 13 is attached to the output shaft of the motor through the fitting hole 14.

The inner blade 12 is pressed against the inner surface of the outer cutter 10 by a support spring 15.

The width t of the cutting surface of the inner blade 12 is very thin and formed in an arc shape toward the outer edge. When such an inner cutter blade 12 is rotated, the cutting edge of the inner cutter blade 12 near the center of the outer cutter 10 aligns with the cutter hole 1 of the outer cutter 10 as shown in FIG.
1 or fall into the concave sink part on the inner surface of the outer cutter crosspiece. The cutting edge of the inner blade 15 near the outer edge falls into the outer cutter hole.

Therefore, the cutting surface of the inner blade 12 rotates while being caught, and a metallic sound is generated. If this problem is severe,
This has the disadvantage that the inner blade 12 stops rotating. Because of this subtle catch, the cutting edge surface wears out quickly, resulting in a loss of sharpness.

In addition, as another conventional example, as shown in Figure @8, the thickness of the cutting surface was increased by [Vc There is something I did. However, this inner blade l! In this case, there is a drawback that the sliding area on the inner surface of the outer cutter 10 increases significantly and the load increases.

Therefore, an object of the present invention is to provide an electric shaver that prevents damage and wear of the outer cutter and inner cutter blades and ensures smooth sliding.

An embodiment of the present invention applied to a reciprocating type is shown in FIGS. 9 to 14. That is, this electric shaver is constructed such that only several inner blades 5a at both ends of the inner cutter block 4 have wavy cutting edge surfaces. The middle inner cutter blade 5b has a flat plate shape. 16 is a reply. The pond is similar to the example in FIG.

Because of this configuration, when the inner cutter blade 5a at the end of the inner cutter block 4 is operated, the inner cutter blade 5a, which reciprocates at a high speed as shown in FIG. 13, serves as an apparent support for the outer cutter 2. The width is an amplitude a', and this a' is the sum of the amplitude a of the reciprocating motion of the conventional example and the swing width t of the wavy shape of the inner cutter blade 5a. As described above, since the amplitude a' of the inner cutter blade 5a is wide, even if the skin is pressed, the outer cutter 2 does not bend as much as in the conventional example. Therefore, the outer cutter is less likely to be damaged by a collision of the inner cutter blade 5a. In addition, the outer blade 2 may be bent due to collision with an object,
Damage to the inner cutter blade 5a is also prevented in the same way.

Furthermore, since the outer cutter 2 bends less at both ends of the inner cutter block 4, the inner cutter blades 5a and 5b are brought into close contact with each other better overall, and the sharpness is improved. Therefore, the inner cutter blades 5a, 5b are less likely to get caught at the sliding contact portion with the outer cutter 2,
Noise is reduced.

A wavy inner blade 5af is provided only at the end of the inner blade block 4.
The reason why c was provided is as follows.
), in the flat inner blade 5b, the scissor angle θ with the outer blade hole can be kept constant, and can be kept around 20' for good cutting, but in the case of the wavy blade 5a, the scissor angle θ is 0.
1. As shown in θ2 (FIG. 12(B)), the inner cutter grade 5a may be different from the adjacent inner cutter grade 5a.

Further, when even one inner cutter blade 5a is moved by the drive of the inner cutter grade 5a, the angle between the outer cutter 2 and the cutter hole 9 gradually changes. For this reason, the wavy inner blade 5
It is difficult to obtain the appropriate sharpness with a.

For this reason, the wavy inner cutter blade 5ai is arranged only at the end of the inner cutter groove 4 where there is little chance of introducing the whiskers from the outer cutter hole 9 and applying force and loosening.

FIGS. 15 to 19 show embodiments of rotary application. In this example, the cutting edge portion of the inner cutter grade 12' that touches the center and outer edges of the outer cutter 10 is formed into a wavy portion 12a.
It was formed by iC. The swing width of the wavy portion 12a is larger than the width of the cut hole 11 of the outer cutter 10, and
It is preferable to take a width larger than the width C of the inner sink llb of 1a. Further, the wave shape may be either concave or concave in the direction of rotation as shown in the figure, but a concave shape is better in terms of hair trapping. ft or @6 of the pond
This is similar to the example in the figure.

With this configuration, when the inner cutter grade 12' is rotated, the positions of the outer cutter hole 11, the outer cutter 1j211a, and the cutting surface of the inner cutter grade 12' are changed as shown in Fig. 17 and @19. It becomes a relationship. Therefore, unlike the conventional example,
Inner cutter blade [2'
The depression of the cutting edge is almost eliminated. That is, the swing width of the wavy portion 12a is the outer cutter hole d, the outer cutter sink I is
Since it is larger than N C, there is almost no drop in the value.

Therefore, the inner blade 12' rotates smoothly without the tip of the cutting edge getting caught in the outer blade hole 11 or the crosspiece sink portion 11b during rotation. For this reason, there is no generation of metallic noise, and the tip of the cutting blade is prevented from being worn out due to falling collisions, thereby preventing deterioration of cutting quality.

As described above, in the electric shaver of the present invention, the inner cutter blade that slides on the inner surface of the outer cutter is provided with a wavy portion, which prevents damage 3 and wear of the outer cutter and the inner cutter blade. The effect is that smooth sliding can be achieved.

[Brief explanation of the drawing]

@Figure 1 is a cross-sectional view of the conventional reciprocating electric razor blade Pro'Vri, and Figure 2 is an expanded view of its outer blade. Figure 3 is a perspective view of the inner cutter block, Figures 4 and 5 are explanatory diagrams of its operation, Figure 6 is a cutaway side view of a conventional rotary electric shaver blade, and Figure 7 is a cutaway side view of the blade of a conventional rotary electric shaver. An explanatory diagram showing the relationship between the outer blade and inner blade of No. 7, Fig. 8 is a plan view of a modification of the No. 7 Uchiba Pro-Tsuku, and Fig. 9 is a plan view of a modification of the No. 7 Uchiba Pro-Tsuku. A sectional view, Fig. 10 is a perspective view of the seventh inner blade pro, and Fig. 11 is a plane view of the inner blade pro.
9), Fig. 12 tAl FB+ is also an explanatory diagram of its action, Fig. 13 and @14 are explanatory diagrams of its action, Fig. 15 is a cutaway side view of the blade pro-tsuku of Ike's embodiment, Fig. 1
Figure 6 is a perspective view of the inner blade pro...tsuk, and Figure 17 is the relationship between the inner blade and outer blade. Explanatory diagram showing, 1st
Similarly, FIG. 8 is a partially enlarged cross-section of the outer cutter □□□, and FIG. 19 is a diagram illustrating its operation. 1... Outer blade blow Jri, 2... Outer blade, 3... Outer blade frame, 4°゛° Inner blade pro...tsuk, 5.5a, 5
b...Inner blade grade, 6...Inner blade frame, 9...
・Everyone, 10...Outer cutter, 12, 12'...Inner cutter blade, 12a...Wavied portion, 13...Inner cutter frame, 17...Outer cutter frame Fig. 2 Fig. 3 Figure 4 Figure 5 Figure 6 Figure 8 Figure 7

Claims (2)

[Claims] (1) An electric shaver with a corrugated portion on the inner blade that slides on the inner surface of the outer blade. (2) A special feature in which the wavy portions of the inner blade grade are provided at both ends of the inner blade! f. The electric shaver according to claim (1).