JPS6015342B2 - electric razor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electric shaver that cuts crabs introduced through a cut hole provided in an outer cutter using an inner cutter that slides into contact with the inner surface of the outer cutter.

The following points are always a problem with this electric shaver.

In other words, the larger the opening area of the blade hole provided in the outer blade, the easier it is for hair to be introduced into the blade, which improves the introduction efficiency and enables quick shaving without leaving any unshaved areas. If the blade is made larger, when the outer blade is pressed against the skin, too much skin will be introduced through the blade hole and the inner blade will damage the skin, causing irritation called stinging. The present invention has been made to solve the problem of the tradeoff area of the cutter hole, and its purpose is to improve the hair introduction efficiency by changing the effective cutter hole area of the cutter hole. To provide an electric razor which is designed to shorten the shaving time by improving the quality of hair and reduce the irritation caused by damaging the skin with the inner blade. The present invention will be explained in detail below based on illustrated embodiments.

The illustrated example shows a rotary electric shaver, and a rotary shaft 12 having an inner cutter 6 attached to the upper end thereof is driven by the shaver housed in a housing 11. A small gear 15 is fixed to the rotating shaft 12 and is meshed with a large gear 16 supported by a shaft 13 provided inside the housing 11. A cam 17 is integrally connected to the large gear 16. Normally, the rotation speed of the inner cutter 6 is about 500 pm, so the reduction ratio between the small gear 15 and the large gear 16 is preferably 1/10 to 1'3 Fahrenheit. A cam lever 18 that engages with the cam 17 is fixed to a cam lever contact 14 supported on the housing 11, and a spring 22 causes the tip of the cam lever 18 to engage with the cam 17.
It is biased in the direction of contact with the circumferential surface. 21 is an adjustment screw that is screwed into the housing 11, and a knob at one end is connected to the housing 11.
The end of this adjustment screw 21 that protrudes outside is the cam lever 18.
By touching the cam 1 of the cam lever 18, the cam 18 of the cam lever 18 is prevented from coming into contact with the entire circumferential surface of the cam 17.
7 to adjust the rotation range.

An adjustment gear 19 is fixed to the cam lever shaft 14. The adjusted gear 20 that meshes with the adjustment gear 19 is the inner outer cutter 3 of the outer cutter 1 composed of two layers: the outer outer cutter 2 and the inner outer cutter 3.
It is provided on a part of the inner circumferential surface of a fixing ring 9 that fixes the inner and outer cutter frames 8 to the inner and outer cutter frames 8. An inner outer cutter frame 8 and a fixing ring 9 are rotatably arranged on the inner periphery of a frame 7 that is screwed onto the upper end of the housing 11, and an outer outer cutter frame 10 is fixed to the outer periphery of the frame 7. The inner and outer cutters 3, which are also formed in a dome shape, are rotatable while sliding against the dome-shaped outer cutter 2 whose circumference is supported by the outer cutter frame 10'. That's why. The inner and outer cutters 3, which are also provided with a cutter hole 5 for introducing hair at a position corresponding to the cutter hole 4 for introducing hair provided on the outer outer cutter 2, are driven by an adjustment gear 19 to reciprocate within a small angle. By doing this, the lotus passage area of the double-edged holes 4 and 5 is changed. In other words, if the inner cutter 6 is rotated by the motor,
The small gear of the rotating shaft 12 is also connected to the cam 17 from 5 through the large gear 16.
rotates, causing the cam lever 18 to rotate in an intermittent manner.

With this movement, the adjusting gear 19 meshes with the adjusted gear 20 to rotate the inner and outer cutters 3 intermittently. For this purpose, the cutting area 4 of the outer outer cutter 2 and the cutter hole 5 of the inner outer cutter 3 change the lotus passage area as shown in FIGS. 2 and 3.
Here, if the blade hole is a round hole, it usually has a diameter of about 0.5 skin. This value was determined based on the balance between the introduction efficiency of the hair and preventing the skin S from entering the blade hole too much and damaging the skin with the inner blade 6, causing too much irritation. When the lotus passage area of 4 and 5 is the minimum, that is, the diameter b2 of the lotus passage part in the state shown in FIG.
2, when the cam lever 18 is driven and the lotus passage area is maximized, the lotus passage area shown in FIG. .8
Make it about the size of willow. Note that these values are reference values when the blade hole is a round hole, and of course, these values will be different if the shape of the blade hole is different. Double-edged hole 4 in Figure 4
, 5 shows the change in diameter of the lucky part over time.

The diameter of the lotus passage, that is, the effective area of the entrance area, increases in the inter-European direction. This increasing full-open time pitch p is determined by the reduction ratio of the large gear 16 and small gear 15 and the rotational speed of the motor, but 0
．． 1sec~0. An appropriate value is $ec, and a value of 0.1 sec or less when fully opened is determined by the peripheral shape of the cam 17. This value is sufficient for the pressed hair to spring up and be introduced into the blade holes 4 and 5, and not enough for the skin S to penetrate from the blade holes 4 and 5 to the inner surface of the outer blade 1. The value shall be sufficient. As a result, the outer cutter 1 has both the hair introduction efficiency of a blade hole with a 0.8 rib diameter and the stimulation characteristics of a blade hole with a 0.5 rib diameter. In use, when the adjustment screw 21 is screwed in and the cam lever 18 is returned by turning 22, the adjustment screw 21 restricts the operating range of the cam lever 18 so that the cam lever 18 does not come into contact with the circumferential surface of the cam shaft 7. Then, the diameter of b3 shown in FIG. 4 can be set to the normal level, and bl can be fully opened in an intermittent manner.

This means that although the characteristics of the skin vary greatly depending on the individual or the state of the individual, it is possible to obtain the optimum condition according to the skin characteristics. Since it changes the area, by appropriately selecting the time when the effective opening area increases, it is possible to improve the efficiency of hair introduction and reduce irritation to the skin. This allows you to shave quickly without damaging your hair.

Brief explanation of the south part of the figure. Figure 1 is a cutaway perspective view of one embodiment of the present invention, Figures 2 and 3.
The figure is an enlarged sectional view of the cutter hole of the outer cutter as above, and Fig. 4 is a time chart of the effective opening diameter of the cutter hole as above, where 1 is the outer cutter, 2 is the outer outer cutter, and 3 is the inner outer cutter. , 4? 5 is the blade hole, 6
indicates the inner blade.

Figure 2 Figure 3 Figure 1 Figure 4

Claims (1)

[Claims] 1. The outer cutter on which the inner cutter slides on the inner surface is formed of two layers, the outer outer cutter and the inner outer cutter, both of which are made of thin plates, and at least one of the outer cutter and the inner outer cutter is movable in sliding contact with the other. An electric shaver is driven intermittently as a razor, and has a variable communication area of blade holes for inserting a beard, which are provided correspondingly to an outer cutter and an inner outer cutter, respectively.