JPS63203179A - Outer blade of 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 (Technical Field) The present invention relates to a rotary electric shaver in which an inner cutter is in rotating sliding contact with the inner surface of an outer cutter, or a reciprocating electric shaver in which an inner cutter is in reciprocating sliding contact with the inner surface of an outer cutter. This relates to the outer cutter.

(Background technology) In order to reliably cut long beards that have been grown for several days or fallen beards, electric razors are equipped with elongated three-dimensional beard introduction holes in the outer blade, and also have hair in the beard introduction holes. Some types have a comb provided on the back side of the beard introduction hole in order to reduce irritation to the skin by preventing pulling and preventing the skin from falling into the beard introduction hole.

As an electric shaver as mentioned above, Japanese Patent Application Laid-Open No. 61-92688
There is something disclosed in the publication No. 10 and 11 are partially sectional perspective views of the rotary electric shaver blade. In FIG. 10, 1 is an outer cutter mounted on the outer cutter 7 frame 2, and 3 is an inner cutter that rotates in sliding contact with the outer cutter 1. The tip of the outer cutter pillar 4 of the outer cutter 1 forms a beard introduction region 5, and the middle portion forms a beard introduction cutting hole 6, and the outer cutter 1 and the inner hole 3 are connected to each other in the beard introduction cutting hole 6.
The beard is cut by sliding contact. In addition, a comb 7 formed of a molded product or the like is provided on the back surface of the outer cutter pillar 4 in the whisker introduction region 5.
is the provision. In the figure, the opening width A of the whisker introduction region 5 is larger than the opening width B of the sliding region of the whisker introduction cutting hole 6 (referring to the region of the whisker introduction cutting hole 6 that comes into sliding contact with the inner blade 3) 8. Although it is wide, the comb 7 provided in the beard introduction area 5 is a molded product, so there is a large variation in dimensional accuracy, and the outer blade 1
When assembling the comb 7 and the comb 7, misalignment often occurs, and the opening width is reduced to A' as shown in the figure, resulting in poor hair introduction efficiency.

Furthermore, in the part marked ■ in the figure, the beard gets stuck, and in the part O, the opening width is small, so hair pulling such as the beard getting caught by the cutting edge of the outer blade 1 occurs, which causes serious skin irritation. There was a drawback.

Furthermore, as shown in FIG. 11, the outer cutter 1 and the comb 7 are also misaligned in the vertical direction, and a gap δ is generated between the outer cutter 1 and the comb 7, and hairs enter this gap δ. Hair pulling occurs, and the comb 7 is shifted downward, and the height H8 to the bottom of the comb 7 is smaller than the height Hl of the end of the beard introduction area 5. Since the height H3 is also larger than the height Hl of the end, the end 9 of the outer blade 1 in the beard introduction region 5 is exposed, and the end 9 is likely to get caught in the beard or become hairy. There were drawbacks.

In addition, in order to eliminate these drawbacks, the opening width is adjusted without providing the comb 7 to reduce irritation to the skin, as shown in FIG. C is A
Similarly, because the width of the outer cutter post 4 is small and because the comb 7 is not provided, the strength of the outer cutter post 4 decreases, and the outer cutter post 4 may break.

(Object of the Invention) The present invention was proposed to solve the above-mentioned drawbacks, and its purpose is to improve the introduction of whiskers and to eliminate the misalignment between the outer cutter and the comb by removing the comb. By optimizing the opening width and height of the beard introduction area, it reduces irritation to the skin. (Electric shaver that improves the strength of the outer blade pillar by increasing the size and prevents the outer blade pillar from breaking)
The objective is to provide the outer blade of

(Disclosure of invention) Embodiments of the present invention will be described below along with the drawings.

1 to 5 are diagrams showing one embodiment of the present invention. FIG. 1 is a partially cutaway sectional view of the blade of a rotary electric shaver, in which the outer cutter 10 is attached to the outer cutter frame 11, the inner cutter 12 is attached to the inner cutter frame 13, and the outer cutter 10 is attached to the outer cutter 10 by a push-up spring 14. It is an inner blade that presses and slides.

FIG. 2 is an enlarged perspective view of the X part in FIG. 1, and shows the whisker introduction cutting hole 15, that is, the whisker introduction region 16 at the outermost circumference of the outer cutter 1, and the outer cutter 10 and inner cutter 12 in sliding contact to cut the whiskers. FIG. 3 is a diagram showing a sliding contact area 17.

Moreover, FIG. 3 is a front view of the outer peripheral part of the outer cutter IO.

In these figures, the outer cutter post 18 of the outer cutter 10 is arranged on the outer cutter frame 11 so as to form a hair introduction cutting hole 15t. An outer cutter post 18 is arranged on the outer cutter frame 11 without providing a comb in the hair introduction region 16. The opening width A of this whisker introduction cutting hole 15 is the sliding contact area (whisker cutting area).
Since the opening width B is larger than the opening width B of No. 17, there is no hair pulling due to the beard getting caught, and the beard introduction is improved. In addition, the opening width c6 at the end of the whisker introduction region 16 is made smaller, and the outer cutter pillar 18
By making the width D2 of the end portion of the outer cutter post 18 larger than the width, the strength of the outer cutter post 18 can be improved and breakage of the outer cutter post 18 can be prevented.

In addition, FIG. 4 is a diagram showing another example of the shape of the outer cutter post, and the outer cutter post 18 in the hair introduction region has a stepped shape.

FIG. 8 shows the relationship between the opening width A of the beard introduction region 16, the beard introduction ability, the hair pulling force, and the skin contact feeling (stimulation). The hair pulling force was good, and the hair pulling force maintained the bottom value at A of 111 or above, and the skin feel started to deteriorate at A + 0.3 I11 or below, and A +
It deteriorates rapidly at 0.35111 or higher.

Based on the above relationship, the opening width A is approximately 063~0.
The optimum value is 35 wings, which satisfies the following three properties: good beard introduction, low hair-pulling force, and good skin feel (less irritation).

Further, FIG. 5 is a diagram illustrating the height of the whisker introduction region. The height Hl of the whisker introduction region is larger than the height Hl from the outer cutter rear 18 to the outer cutter frame 11, and by forming the outer cutter frame Li above the end of the whisker introduction region 16, the whisker introduction cutting can be performed. By fitting the end 15' of the hole 15 into the outer cutter frame 11, hair pulling at the end can be prevented.

FIG. 9 illustrates the relationship between the height H8 of the beard introduction region 16, the introduceability of the beard, the feeling of pulling the hair, that is, the feeling of pulling the hair, and the feeling of contact with the skin (stimulation). H! +1.0
A value of 11 or above is good, and the hair pulling feeling is 1.1 in H3. It is weaker than O, and the feel on the skin is 1. When Qmmi is exceeded, the condition deteriorates rapidly. Therefore, the height H of the beard introduction region 16
Optimally, l is about 1.0 based on the three curves of beard introduction, hair pulling feeling, and skin feel.

Next, FIGS. 6(a), 6(b), and 7 are diagrams showing other embodiments of the present invention. In FIGS. 6(a) and 6(b), 19 is an outer cutter attached to the outer cutter frame 20, and 2
Reference numeral 1 denotes an inner cutter that reciprocates and slides into contact with an outer cutter 19, and is a diagram showing the blade of a reciprocating electric shaver. Figure 7 is Figure 6 (b)
It is an enlarged view of the Y part shown in FIG. In this embodiment, as well as the previous embodiment, the sliding contact area (whisker cutting area) of the whisker introduction cutting hole 1
The opening width Ai of the whisker introduction microscope area 16 is made larger than the opening width B of No. 7, and the end portion C thereof is made smaller, and the end portion is made t-larger than the width D1 after the outer blade, excluding the comb. , it can improve the introduction of whiskers, prevent hair pulling, and improve the strength after outer cutting.

(Effects of the Invention) As described above, according to the present invention, a sliding contact region where the inner cutter makes sliding contact and a whisker introducing region where the inner cutter does not make sliding contact are formed on the outer cutter,
A whisker introduction cutting hole was bored in the outer blade that spanned the sliding contact area and the whisker introduction region, and the opening width of the whisker introduction cutting hole in the whisker introduction region was made wider than the opening width of the whisker introduction cutting hole in the sliding contact area. In the outer blade of the electric shaver, the width of the end opposite to the sliding contact area of the beard introduction area of the beard introduction cutting hole is narrowed, and the width of the end after the outer blade is increased, thereby achieving the following. It is effective.

(1) Eliminate the comb, make the opening width of the hair introduction area of the hair introduction cutting hole 0.3 to 0.35mm, make the end part below the outer blade frame, and make the height approximately Q, l 111+. It can improve the introduction of hair, reduce the hair pulling force, and improve the feel on the skin (less irritation).

(2) It is especially helpful to reduce the opening width at the end of the hair introduction area of the hair introduction cutting hole and increase the width of the outer cutter. Prevents breakage after the blade.

[Brief explanation of the drawing]

1 to 5 are views showing one embodiment of the present invention, in which FIG. 1 is a partially cutaway sectional view of a rotary electric shaver, FIG. 2 is an enlarged perspective view of the X portion in FIG. 1, and FIG. Figure 3 is a front view of the outer periphery of the outer cutter, Figure 4 is a diagram showing another example of the shape after the outer cutter, Figure 5 is a diagram explaining the height of the hair introduction area, and Figure 6 (
stomach). (B) and FIG. 7 are diagrams showing other embodiments of the present invention,
Figure 6 (a) is a side view of the two-part cross section, and Figure 7 is the Y of Figure 6.
Enlarged views of parts, Figures 8 and 9 are diagrams explaining the present invention in detail, Figure 8 is a diagram showing the relationship between the opening width and performance, and Figure 9 is a diagram showing the relationship between the height of the whisker introduction region and performance. Figure 10 showing
1 and 11 are explanatory diagrams of a conventional rotary electric shaver, with FIG. 10 being a partially cutaway perspective view, and FIG. 11 being a partially sectional view of the outer cutter. 10... Outer blade, 11... Outer blade frame, 12...
Inner blade, 15... Beard introduction cutting hole, 16... Beard introduction area, 17... Sliding contact area (beard cutting area), 18... Outer blade rear. (1 other person) Figure 1 Figure 5 Figure 6 (A) (B) Figure 7 Figure 8 Opening width A (mm) Figure 9 Beard introduction 4;

Claims (4)

[Claims] (1) Forming a sliding contact area where the inner blade makes sliding contact and a hair introduction area where the inner blade does not make sliding contact on the outer blade, and drilling a hair introduction cutting hole in the outer blade that spans the sliding contact area and the hair introduction area, In the outer blade of an electric razor, the opening width in the beard introduction region of the beard introduction cutting hole is formed wider than the opening width in the sliding contact region of the beard introduction cutting hole, wherein the sliding contact of the beard introduction region of the beard introduction cutting hole is provided. An electric razor outer blade in which the width of the edge opposite to the area is narrowed and the outer edge of the edge is widened. (2) The outer blade of an electric shaver according to claim 1, wherein the opening width of the beard introduction region is set to 0.3 to 0.35 mm. (3) The outer cutter for an electric shaver according to claim 1, wherein the upper end of the outer cutter frame is located above the end of the beard introduction area of the beard introduction cutting hole. (4) The outer blade of an electric shaver according to claim 1, wherein the height of the beard introduction region is approximately 1.0 mm.