JPH0446157B2 - - Google Patents

Description

[Detailed Description of the Invention] (Technical Field) The present invention relates to an inner blade of a rotary electric shaver.
The present invention relates to an inner cutter for a rotary electric shaver, in which the inner cutter is composed of an outer inner cutter and an inner inner cutter.

(Background Art) Various types of inner cutters for rotary electric shavers have been provided, each of which has an inner cutter including an inner inner cutter and an outer inner cutter.

As shown in FIGS. 4a, b, and c, the outer inner cutter and the inner inner cutter of the conventional inner cutter have the same skew angle α and are arranged on a straight line. Fig. 4a is a plan view of the inner cutter, Fig. 4b is a side view of the inner cutter partially shown in cross section, and Fig. 4c is a plan view showing the inner cutter push-up spring. Consisting of an inner cutter 1 and an outer inner cutter 2,
It is attached to the inner cutter frame 3, and is configured to be rotated by a shaft 5 while slidingly contacting an outer cutter (not shown) while being pushed upward by an inner cutter push-up spring 4. In such a configuration, when the inner inner cutter 2 and the outer inner cutter 1 have the same skew angle α,
The inner cutter as a whole has a large contact area with the outer cutter during rotation, which has the disadvantage of generating noise.

(Object of the invention) The present invention comprises an inner cutter consisting of an inner inner cutter and an outer inner cutter, the inner inner cutter having a skew angle, and the outer inner cutter arranged in a direction crossing the inner inner cutter. By doing so, the main purpose is to reduce the area where the inner inner cutter and the outer inner cutter contact the outer cutter, thereby reducing the noise generation area, thereby reducing noise.

Further, the present invention aims to reduce the collision noise between the outer cutter and the outer inner cutter by providing a guide on the outer inner cutter to prevent the outer cutter from falling into the hole of the outer cutter. .

(Disclosure of the Invention) Fig. 1 and Fig. 2 a, b, and c are views showing one embodiment of the present invention, in which Fig. 1 is a partially cutaway external view, Fig. 2 a is a plan view of the inner cutter, Figure b is a partially sectional side view, and figure c is a view taken in the direction of arrow A. In these figures, 6 is a housing which has a space for housing a battery, 7 is a motor, 8 is a blade mount, and a mount 8
An outer cutter frame 9 is screwed to hold the outer cutter 10. Further, the shaft 11 of the motor 7 and the inner cutter frame 12 are connected via a joint 13.
An inner cutter 16 consisting of an inner inner cutter 14 and an outer inner cutter 15 is attached to the inner cutter frame 12. Further, the inner cutter 16 is integrally formed with a push-up spring 17, and the inner cutter 16 is pressed against the outer cutter 10 by the push-up spring 17. Further, the inner inner cutter 14 has a skew angle α, and the outer inner cutter 15 has a cross angle β with respect to the inner inner cutter 14. By intersecting the inner inner cutter 14 and the outer inner cutter 15 in this way, when the inner cutter 16 is rotated, the outer inner cutter 15
The contact area between the inner cutter 16 and the outer cutter 10 is smaller than before, and the contact sound between the inner cutter 16 and the outer cutter 10, that is, the noise, is reduced.

In addition, as shown in FIGS. 2a and 2c, a guide guide 18 is installed on the inner cutter frame 12 to prevent the outer peripheral inner cutter 15 from falling into the hole of the outer cutter 10 and from swinging out during rotation.
Since it was decided to support the outer peripheral inner cutter 15,
The inner cutter 16 rotates while smoothly contacting the outer cutter 10 during rotation. Therefore, the collision noise between the inner cutter 16 and the outer cutter 10 is reduced.

Further, the inner cutter 16 consisting of the inner inner cutter 14 and the outer inner cutter 15 is integrally formed with the push-up spring 17, and its fulcrum supports the end of the inner inner cutter 14, stably connecting the outer cutter 10 and the inner cutter. 16 to further suppress noise.

Next, Fig. 3 a, b, and c are views showing other embodiments of the present invention, in which Fig. 3 a is a plan view, Fig. 3 b is a partially sectional side view, and Fig. 3 c is a push-up It is a top view showing a spring part. In this embodiment, the inner inner cutter 14' and the outer inner cutter 15' are provided independently, and the inner inner cutter 14' and the outer inner cutter 15' have skew angles α and α', respectively. , inner inner cutter 14' and outer inner cutter 1
5' has an intersection angle β. In this way, noise caused by the outer cutter 10 during rotation is suppressed. Also,
The end of the inner cutter 14' is pressed against the outer cutter 10 by push-up springs 19, 19', and the inner cutter 15' is pushed against the outer cutter 10 by a push-up spring 20.

(Effects of the Invention) As explained above, according to the present invention, in the inner cutter of a rotary electric shaver, the inner cutter is constituted by an outer inner cutter and an inner inner cutter, and the outer inner cutter is an inner cutter on the inner circumference. By placing the guide in the direction that intersects the blade and providing a guide on the inner blade on the outer periphery, contact noise and collision noise between the inner blade and the outer blade are suppressed, reducing noise and making it comfortable to use. I can do it.

[Brief explanation of the drawing]

Figures 1 and 2a and 2b are diagrams showing one embodiment of the present invention, in which Figure 1 is an external view with a partially cutaway cross section, Figure 2a is a plan view of the inner cutter, and Figure 2a is a plan view of the inner cutter. Figure b is a side view partially shown in cross section, Figure 2c is a view taken in the direction of arrow A in Figure 2a, and Figures 3a, b, and c are views showing other embodiments of the present invention. Figure 4a is a plan view, Figure b is a side view partially shown in cross section, Figure c is a plan view showing the push-up spring section, and Figures 4a, b, and c explain the conventional inner cutter. It is a diagram. 10...Outer blade, 12...Inner blade frame, 14,
14'...Inner circumference inner cutter, 15,15'...Outer circumference inner cutter,
16...Inner blade, 17, 19, 19', 20... Push-up spring.

Claims (1)

[Scope of Claims] 1. In the inner cutter of a rotary electric shaver, the inner cutter is composed of an outer inner cutter and an inner inner cutter, and the outer inner cutter is arranged in a direction crossing the inner inner cutter. An inner cutter for a rotary electric shaver, characterized in that the outer inner cutter is provided with a guide for supporting the outer inner cutter. 2. The inner cutter of a rotary electric shaver according to claim 1, wherein the outer inner cutter and the inner inner cutter are integrally formed, and only the upper end portion is formed separately. 3. Claim No. 3, characterized in that the outer inner cutter, the inner inner cutter, and the push-up spring are integrally formed, and the push-up spring supports the portion located at the end of the inner inner cutter. The inner blade of the rotary electric shaver according to item 1.