JPH049075B2 - - Google Patents

Description

[Detailed description of the invention] (Technical field) The present invention relates to an electric shaver.

(Background Art) Conventionally, electric razors are generally configured to sandwich the beard that has been introduced into the outer blade between a net-shaped outer blade having a large number of hairlet introduction holes and a vibrating or rotating inner blade. However, the drawback was that it generally did not have the effect of pulling out the beard, making it impossible to shave it short.

(Object of the Invention) The present invention has been proposed in view of the above-mentioned drawbacks, and its purpose is to configure the inner blade to vibrate in a complex manner so that the beard is not pulled out and the skin is not damaged. The aim is to propose an electric razor that allows for a shorter shave.

(Disclosure of invention) The present invention will be explained below with reference to the drawings.

1 to 3 show one embodiment of the present invention. In FIG. 1, 1 is a motor, and an eccentric shaft 2 is attached to its output shaft. A drive body 3 having a substantially convex side surface is engaged with the eccentric shaft 2, and this drive body 3 is supported by a support leg 3a and a damper 5, which are engaged with the inner wall 4 of the main body.
It is configured to be able to freely reciprocate in the horizontal direction by following the movement.

On the other hand, an outer cutter frame 6 is attached to the upper part of the main body, and at the top of this outer cutter frame 6, an outer cutter 7 having a substantially semicircular arc cross section and having a large number of hair introduction holes is disposed. Inwardly of the outer cutter 7, an inner cutter block 8 consisting of an inner cutter base 8a, an electrostrictive base 8b, and a large number of inner cutter blades 8c is disposed.

That is, in this inner cutter block 8, the electrostrictive base 8b has the property of vibrating finely at high speed when a voltage is applied like a ceramic drive element, and the inner cutter blade 8c has such electrostrictive properties. It is directly buried in the base 8b. Further, the inner cutter base 8a is pushed up toward the outer cutter 7 by a spring 9, and the tip edge of the inner cutter blade 8c is in sliding contact with the inner surface of the outer cutter 7. 10 is a switch, which has predetermined wiring between the motor 1 and the power connector 11;
and an electrostrictive base 8 in series with the connector 11
a is connected via a flexible lead wire 12.

Next, this operation will be explained.As is well known, when the switch 10 is turned on, the motor 1 rotates, and the inner cutter block 8 reciprocates via the eccentric shaft 2 and the drive body 3. At this time, in the present invention, since a voltage is also applied to the electrostrictive base 8b, this electrostrictive base 8b vibrates slightly. Therefore, as shown in FIG. 2, if the displacement curve due to the reciprocating motion of only the inner cutter blade 8c is denoted as A in the figure, in the present invention, the slight vibration of the electrostrictive base 8b is added to this, resulting in a total displacement curve of B. Due to these characteristics, the inner blade 8c reciprocates while slightly vibrating.

For this reason, the conventional beard H cutting operation has been changed to a third
As shown in Figure A, in the present invention, as shown in Figure B, the slightly vibrating inner blade 8c hooks and guides the whiskers H and then cuts them with the inner blade 8c, so it is clear from the figure. As shown, the beard H is cut much shorter than before. Note that the electrostrictive base 8b may be driven by a pulsed voltage. Also, in Figure 3 A, 7'
8c' indicates the outer blade, and 8c' indicates the inner blade.

Next, FIGS. 4 to 6 show reference examples of the present invention, and the purpose of this example is to improve the cutting quality by configuring the outer cutter to be freely floating.

That is, a boss 13b is provided protruding from the center of the inner surface of the side wall 13a of the outer cutter frame 13, and hooks 13c are provided on both sides of the boss 13b.
A notch 14b capable of receiving the boss 13b is provided in the center of each of the base pieces 14a facing each other.
After forming long holes 14c on both sides of b, the outer cutter 14 is attached to the outer cutter frame 13 by fitting the notch 14b in the boss 13b and the long hole 14c in the hook 13c.

On the other hand, the inner cutter block 15 equipped with the inner cutter blade 15a has a spring 17 at the upper end of the drive body 16,
It is rotatably attached via a joint 18 and a pin 19.

FIG. 5 is a sectional view of the inner cutter block 15 assembled inside the outer cutter 14, and FIG. 6 shows the operating state. In other words, when the center of the outer cutter 14 is pushed from directly above during shaving in the normal state shown in FIG. It sinks by d. Furthermore, when a load is applied to the vicinity of the end of the outer cutter 14 as shown in FIG. In this case as well, there is no change in the adhesion between the outer cutter 14 and the inner cutter blade 15a. The inner cutter block 15 is regulated by the drive body 16 so as not to rotate more than necessary, and the rotation and vertical float of the outer cutter 14 are also regulated by the inner cutter block 15 and the drive body 16. ing.

As described above, this example has the advantage that the adhesion between the outer cutter 14 and the inner cutter blade 15a is not impaired even if a load is applied to the outer cutter 14 in any direction, and a suitable cutting quality can always be provided. be. Also in this example, it is of course possible to adopt a structure in which the inner blade 15a is supported by the electrostrictive base as in the previous embodiment.

(Effects of the Invention) As described above, according to the present invention, since the inner cutter blade that reciprocates while slidingly contacting the inner surface of the outer cutter is configured to slightly vibrate at the same time as the reciprocating movement, the inner cutter blade This vibration effectively pulls out the beard without damaging the skin, allowing for a shorter shave and improved cutting quality.

[Brief explanation of drawings]

Figures 1 to 3 show one embodiment of the present invention. Figure 1 is an explanatory view of the main part, Figure 2 is a graph showing the displacement of the inner cutter blade, and Figure 3 A and B are graphs showing the displacement of the inner cutter blade. 4 to 6 show reference examples of the present invention. FIG. 4 is a perspective view of the main part, FIG. 5A is a sectional view of the main part, and FIG. c sectional view, 6th
Figures A, B, and C are operation explanatory diagrams, respectively. DESCRIPTION OF SYMBOLS 1...Motor, 7...Outer cutter, 8...Inner cutter block, 8a...Inner cutter base, 8b...Electrostrictive base, 8
c...Inner blade.

Claims (1)

[Scope of Claims] 1. An electric shaver characterized in that an inner cutter blade that reciprocates while slidingly contacting the inner surface of an outer cutter is configured to slightly vibrate at the same time as the reciprocating motion. 2. The driving source for reciprocating the inner blade is a motor, and the driving source for slightly vibrating the inner blade is an electrostrictive element that vibrates upon application of a voltage. An electric shaver according to claim 1, which holds an inner cutter blade. 3. The electric shaver according to claim 2, wherein a pulsed voltage is applied to an electrostrictive element.