JPS59101181A - 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] This invention relates to an electric shaver.

1 to 3 show a conventional rotary electric shaver bt. In the figure, reference numeral 1 denotes a spherical outer cutter, which is attached to an outer cutter frame 2. Reference numeral 3 denotes an inner cutter grade that rotates in sliding contact with the inner surface of the outer cutter 1, and a plurality of these are attached to the inner cutter frame 4. The inner cutter blade 3 is pressed against the inner surface of the outer cutter 1 by a push-up spring 5. The inner cutter frame 4 is attached to the output shaft of the motor via the fitting hole 6.

In such an electric shaver, the inner blade 3 is always in contact with the outer cutter 1 and wears out, whereas the inner surface of the outer cutter 1 is worn only at the moment when the inner cutter blade 3 passes, so after long use, Compared to the amount of wear h' on the inner surface of the outer cutter 1, the amount of wear on the inner cutter blade 3 is extremely large. Therefore, outer blade 1
Even if the inner blade 3 is usable, the inner blade 3 is 1.5
The drawback is that it deteriorates after years of use and becomes less sharp.

Therefore, an object of the present invention is to extend the service life of the inner blade to the same level as the outer blade, which wears slowly, and to extend the life of the blade as a whole.

Embodiments of this invention are shown in FIGS. 4(2) to 7.

In other words, this electric shaver has an inner blade of grade 7.
Place the second blade 7b on the inner blade so that the tip of the second blade 7b is at a position lower than the tip of the second blade 7a by h (the amount of wear on the inner blade after 1.5 years of use). It is formed from a cut and raised piece from 7. The pond is similar to the example in FIG.

In this way, since the second blade 7b't@1 is formed at a position h lower than the blade 7a, even if the first blade 7a wears out and becomes less sharp after being used for about 1.5 years. When the amount of wear reaches h, the second blade 7b starts to come into contact with the inner surface of the outer cutter 1 and starts to exhibit cutting ability ft. The state (2) at this time is the state shown in FIGS. 5-2 and 7. Since the second blade 7b is used in this manner, the cutting life of the inner blade 7 is increased, and it can be used until the inner surface of the outer blade 1 is worn out and becomes unusable.

@8 Figures 2 and 9 show examples of ponds. In this example, the first blade 8a and the second blade sb,! :2 are joined by welding etc. to form one inner blade 8, and the tip of the second blade 8b is connected to the first
It is made lower by h than the tip of the blade 8a. 1st
The second blade 8a has a Kaitsu shaku 9 at a distance of Δh from the tip of the second blade 8b.
be installed at a lower position.

With this configuration, even if the first blade 8a wears out,
As shown in FIG. 9, the cutting life of the inner blade 8 is extended by the second blade 8b starting to cut.

Since the overlapping distance Δh' is provided, even if the first blade 8a is cut off due to wear when passing through the anus 9, a state where the first blade 8a cannot be cut will not occur, and the second blade 8b will subsequently cut the beard. You can shave. Further, since the hole 9 is provided in the through hole, the worn blade 8a of @1 does not interfere with the force exerted by the second blade 8b. The rest is the same as the first embodiment.

FIG. 10 2 and @ 11 show still other embodiments. In this example, the second blade 8b is further provided with a second penetrator 10,
In addition, a third fitting hole 11 is provided in the first blade 8a. Twelfth and second blades 8a.

The portions below the respective slots 9 and 10 of 8b are processed as cutting blades, forming a third blade 8c and a fourth blade 8d.

With this configuration, even after the second blade 8a wears out, the third blade 8C2 and the fourth blade 8d can be used, further extending the cutting life of the inner blade V-shaped blade 8. Become. Also in this case, since the overlapping distance Δh is provided, sharp cutting can be performed continuously from the first blade 8a to the fourth blade 8dK.

12 to 14 show an embodiment applied to a reciprocating type. In FIG. 2, reference numeral 12' denotes an outer cutter frame to which a semi-cylindrical outer cutter 12 is fixed, and is detachably attached to the housing 14 via an outer cutter frame fixture 13. 15
is an inner cutter frame, and a large number of arc-shaped inner cutter blades 16 are attached in parallel. The inner cutter frame 15 has a reciprocating drive mechanism 18 connected to the output shaft 17a of the motor 17 so that the inner cutter 16 is reciprocated while slidingly contacting the inner surface of the outer cutter 12.
are connected via. The reciprocating drive mechanism 18 includes an eccentric pin 19, an arm 20, a driver z1, and an inner blade mounting member 2.
2. 23 is a dustproof plate. The inner blade 16 is formed of a cut piece and has a second blade 16b. The tip of the second blade 16b is formed lower than the tip of the first blade 16a by h. In this manner, even in the reciprocating four-way type, the cutting life of the inner blade 16 can be increased by the second blade 16b.

8. In the case of reciprocating type, the inner blade 16 is
It can also be formed in the same manner as the embodiment shown in the figure or the embodiment shown in FIG.

As described above, the straight razor of the present invention is provided with a first blade and a second blade lower than the first blade on the inner blade that slides on the inner surface of the outer blade. This has the effect of increasing the service life of the inner blade to the same level as the outer blade, which wears slowly, and thus extending the life of the blade as a whole.

[Brief explanation of the drawing]

@ Figure 1 is a partially cutaway side view of the conventional example, Figure 2 is a partial sectional view of the inner blade before wear, Figure 3 is a partial sectional view after wear, and Figure 4 is an embodiment of the present invention. Figure 5 is a partially cutaway front view of the inner blade after wear, and Figure 5 is a side view of the inner blade after wear.
Figure vg6 is a partial cross-sectional view of Example 7 before wear, Figure 7 is a partial cross-sectional view of Example 7 after wear, Figure $8 is a partial cross-sectional view of Example 2 before wear, and Figure 9 is after wear. Partial cross section,
Fig. 10 is a partial sectional view of another embodiment before wear, Fig. 11 is a partial sectional view after wear of No. 7, Fig. 12 is a sectional view of an embodiment applied to a reciprocating type, and Fig. 13 is its partial sectional view. FIG. 14 is a partial side view before abrasion, and FIG. 14 is a partial side view after abrasion. 1... Outer blade, 2... Outer cutter frame, 4... Inner cutter frame, 5... Push-up spring, 7... Inner cutter grade, 7
a...first blade, 7b...second blade, 8...inner blade grade, 8a...first blade, 8b...@2 blade,
8C...Third blade, 8d...Fourth blade, 9...Saidatsu hole, 12...Outer blade, 12'...Outer blade frame, 1
4...Housing, 15...Inner blade frame, 16.
...Inner blade, 16a...First blade, 16b...
・Second blade Figure 1 Figure 2 Figure 3 WJ Figure 4 Figure 6 Rod 7 Figure 11 Figure 10

Claims (1)

[Scope of Claims] (1) An electric shaver in which a first blade and a second blade lower than the first blade are formed on an inner blade that slides on the inner surface of an outer blade. (121) The electric shaver according to claim (1), wherein the second blade is a cut-and-raised piece. (3) The cutting edge of the second blade forms this second blade. The electric shaver according to claim 2, wherein the electric shaver protrudes beyond the upper edge of the opening formed by the cut and raised portion.