JPS62243581A - Reciprocating type 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 reciprocating electric stove υ.

(Background technology) A conventional method for improving the cutting quality of reciprocating electric razors is to increase the force with which the inner blade is pressed against the outer blade to prevent gaps from forming between the inner blade and the outer blade when cutting beards. It was proposed by.

FIG. 5 is a cross-sectional view of the attachment part of the outer cutter and inner cutter in a conventional reciprocating electric cutter. It is attached to the outer cutter frame 3 by a locking point 8. Reference numeral 4 denotes an inner cutter that slides inside the outer cutter 1 while contacting the inner circumferential surface of the outer cutter 1. This inner cutter 4 is pressed against the inner peripheral surface of the outer cutter 1 by an inner cutter push-up spring 9. The arrows shown on the outer peripheral surface of the outer cutter 1 indicate the distribution of contact pressure between the outer cutter 1 and the inner cutter 4.

As shown by the arrow in this figure, the contact pressure between the outer cutter 1 and the inner cutter 4 is maximum at the top X, and becomes zero at the point Y where the outer cutter 1 and the inner cutter 4 separate. When shaving normally, the outer blade side edge 1
When the skin is brought into contact with point 0, many whiskers are introduced in areas closer to point Y than the point where contact started.

Therefore, the quality of cutting in this area is a problem.
In the contact pressure distribution shown by the arrow in the figure, it is clear that point Y
The sharpness deteriorates as it approaches.

Further, even if the pressing force of the inner blade push-up spring 9 is increased with the mechanism as it is, the contact pressure near the side edge 10 will not increase as much as the contact pressure near the top X becomes large.

In order to improve the above-mentioned drawbacks, Fig.
A post-publication type electric shaver was proposed in Publication No. 81].

In the conventional reciprocating electric shaver shown in FIG. 6, the outer cutter 1 is fixed at the outer cutter locking point 8 by an outer cutter mounting bracket 21 that is attached to the outer cutter frame 3 so that it can be freely protruded so as to be prevented from being pulled out. has been done.

The outer blade 1 has a spring 22 installed inside the outer blade mounting bracket 21.
Then press the outer cutter 1 inward. In this way, an attempt was made to increase the contact pressure near the outer cutter side edge 10, but since the end of the outer cutter 1 (the part near the outer cutter locking point 8) is pressed, the outer cutter 1 The contact area between the inner cutter 4 and the inner cutter 4 is expanded, and in order to increase the overall contact pressure, the spring force of the inner cutter push-up spring 9 must be increased. For this reason, the sliding resistance between the outer cutter 1 and the inner cutter 4 increases, and in the case of a battery type, there is a drawback that the life of the battery is shortened. In addition, in this mechanism, since the outer cutter 1 is pressed at a point close to the outer cutter locking point 8, the outer cutter 1 rotates υ of the inner cutter 4.
Although the contact pressure near the outer cutter side edge 10 does not increase (because the contact pressure depends on the spring force of the inner cutter push-up spring 9), the locking portion of the outer cutter 1 is simply moved inward. The same effect as the next case can be obtained, only the contact area has expanded. Furthermore, in this example, the outer cutter locking portion is likely to be located inside the diameter of the inner cutter 1, and the outer cutter may break at the end of the inner cutter 4 when removing the outer cutter 1 or when driving the inner cutter 4. There is a risk of changing. As explained above, in conventional reciprocating electric shavers, it has not been possible to improve the cutting quality of the outer blade side edge.

(Purpose of the Invention) The present invention was proposed to improve the above-mentioned drawbacks, and in a reciprocating electric shaver, the contact pressure at the edge of the outer blade is increased, and the sharpness of the edge of the outer blade is particularly improved. The purpose is to improve.

(Disclosure of the Invention) In order to achieve the above object, the present invention includes an outer cutter that is curved in a U-shape and is locked to an outer cutter frame at the end;
In a nine-reciprocating electric shaver equipped with an inner cutter that is placed inside the outer cutter and slides while contacting the inner peripheral surface of the outer cutter, the outer cutter locking point locks the outer cutter to the outer cutter frame. The invention is characterized in that a means for pressing inward is provided at an intermediate position between the inner cutter and the bottom surface of the inner cutter.

Next, embodiments of the present invention will be described with reference to the accompanying drawings.

It should be noted that the embodiments are merely illustrative, and it goes without saying that various changes and improvements may be made without departing from the spirit of the present invention.

Figure 1) and (B) are diagrams showing the first embodiment of the present invention, in which Figure (A) is an overall configuration diagram of a reciprocating electric shaver; 2 is a cross-sectional view showing the outer cutter and the inner cutter. In the figure, 1 is an outer cutter that is curved in a U-shape and is locked to the outer cutter frame 3, and 2 is an outer cutter that is provided on the outer cutter 1. A blade hole, 4 is an inner blade that reciprocates, 5 is a driver for reciprocating the inner blade 4, 6 is a switch, 7 is a main body,
Reference numeral 8 indicates an outer cutter locking point where the locking hole of the outer cutter 1 is locked to a locking piece 8' provided inside the outer cutter frame 3;
an inner blade push-up spring for pressing against the inner circumferential surface of the outer blade 1;
, 11 is the inner surface where the outer cutter 1 contacts the outer cutter frame 3, 12 is a bending portion for bending the outer cutter 1, and 13 is the bottom surface of the inner cutter 4.

The main body 7 of the reciprocating electric shaver is provided with a motor (not shown) and a driver 5 for reciprocating the inner cutter 4, and the upper part of the main body 7 has an outer cutter fixed to the outer cutter frame 3. 1 is attached, and the outer cutter 1 and the inner cutter 4 are pressed together by the spring pressure of an inner cutter push-up spring 9 that presses the inner cutter 4 against the inner peripheral surface of the outer cutter 1. When the switch 6 is turned on, the rotational motion of the motor is converted into a reciprocating motion by the driver 5, and the hair introduced into the blade hole 2 is cut. The present invention has a structure that increases the contact pressure between the outer cutter 1 and the inner cutter 4 at the outer cutter side edge 10, and will be explained in detail with reference to FIG. 1(b).

As shown in the figure, a bent portion 12 is provided on the inner surface 11 of the outer cutter frame 3 at a position intermediate between the outer cutter locking point 8 and the inner cutter bottom surface 13. At this bent portion 12, the outer cutter frame 3
The inner surface 11 of the outer cutter frame 3 is bent toward the outside. That is, the edges of the bent portions 12 form straight lines in the direction perpendicular to the plane of the drawing. By providing this bent portion 12, the outer cutter 1 is bent inward. Therefore, the outer cutter 1 is pulled in the direction of arrow B in the figure as a reaction force pushed up by the inner cutter push-up spring 9, and a force is applied to the outer cutter 1 to bend it in the direction of the arrow in FIG. 9 at the bending portion 12. do. Therefore, a force acts on the outer cutter 1 in the direction of arrow C in the figure as a resultant force of both. Force acts in the same direction as the arrow C near the side edge 10 of the outer cutter 1, and the force acts on the side line 1 of the outer cutter without changing the contact pressure at the top point X of the outer cutter.
Contact pressure near 0 can be increased. It is most effective when the position of this bent portion 12 is near the midpoint between the outer cutter locking point 8 and the inner cutter bottom surface 13.

FIGS. 2(A) and 2(B) are views showing a second embodiment of the present invention, in which FIG. It is a figure for explaining the detail of an outer cutter holding part. In the figure, reference numeral 14 denotes an outer cutter holding portion for pressing the vicinity of the side edge 10 of the outer cutter 1 toward the inner cutter to increase contact pressure. This outer cutter holding part will be explained with reference to FIG. 2 (b). This outer cutter holding part 14 has a hole 1 in the outer cutter frame 3.
5, a spring 17 attached to a pressing plate 16 having the same width as the outer cutter 1 is inserted into the hole 15, and the spring 17 is pressed by a screw 18 on the opposite side. . By adjusting the screw 18, the outer cutter 1 is pressed so as to be bent at the position of the pressing plate 16. Due to this action, the contact pressure between the outer cutter 1 and the inner cutter 4 in the vicinity of the outer cutter side edge 10 can be increased.

FIGS. 3(A) and 3(B) are views showing a third embodiment of the present invention, in which FIG. It is a perspective view of an outer cutter.

In the third embodiment, an elastic body having an angular S-shaped cross section is located between the cut hole 2 of the outer cutter 1 and the locking hole 8' that locks the outer cutter 1 to the locking piece 8' of the outer cutter frame 3. 19 is fixed to the outer cutter 1, and the outer cutter 1 is inserted into the locking hole 8'' so that the side of the elastic body 19 opposite to the side to which the outer cutter 1 is fixed is in contact with the inner surface 11 of the outer cutter frame 3.
' is locked to the locking piece of the outer cutter frame 3. The locked outer cutter 1 is pressed so as to be bent at the position of the elastic body 19.

Due to this action, the outer cutter 1 near the outer cutter side edge 10
The contact pressure between the inner cutter 4 and the inner cutter 4 can be increased.

FIGS. 4(a) and 4(b) are diagrams showing a fourth embodiment of the present invention, in which FIG. In the fourth embodiment, a pressing plate 20 having a triangular cross section is fixed to the outer cutter IK between the cutter hole 2 and the locking hole 8' of the outer cutter 1. The locking hole 8' is locked to the locking piece 8' so that the top of the pressing plate 20 contacts the inner surface of the outer cutter frame 3.The locked outer cutter 1 is bent at the position of the pressing plate 20. Due to this action, the contact pressure between the outer cutter 1 and the inner cutter 4 in the vicinity of the outer cutter side edge 10 can be increased.

(Effects of the Invention) The present invention provides a reciprocating electric cutter with a pressing means that presses inward at an intermediate position between the outer cutter locking point that locks the outer cutter to the outer cutter frame and the bottom surface of the inner cutter. This increases the contact pressure between the outer cutter and the inner cutter near the edge of the outer cutter, prevents a gap from forming between the outer cutter and the inner cutter, and increases the contact pressure between the outer cutter and the inner cutter over the entire surface of the outer cutter. The cutting edge is kept even and the cutting quality near the edge of the outer blade is improved. That is, the present invention provides a reciprocating electric shaver that has a well-balanced cutting quality over the entire surface of the outer blade.

[Brief explanation of drawings]

ε Figure 1G] and (B) are diagrams showing the first embodiment of the present invention, in which (A) is an overall configuration diagram of a reciprocating electric shaver, and (B) is a diagram showing the main points of the present invention. Sectional view showing part, 8t42
Figures (A) and (B) are diagrams showing a second embodiment of the present invention, in which Figure (A) is a sectional view of the mounting portion of the outer cutter and inner cutter, and Figure (B) is a sectional view of the outer cutter and the inner cutter. Figures 3 (a) and 3 (b), which are diagrams for explaining details of the presser part, are diagrams showing the third embodiment of the present invention, and the same figure (a) shows the attachment of the outer cutter and the inner cutter. FIG. 4 (B) is a perspective view of the outer cutter, FIG. 4H] and (B) are a fourth embodiment of the present invention, and FIG.
is a sectional view of the outer cutter and the inner and outer attachment parts, FIG. 6 is a perspective view of the outer cutter, FIG. FIG. 2 is a sectional view of a conventional reciprocating electric stove υ. 1... Outer blade, 2... Blade hole, 3... Outer blade frame,
4...Inner blade, 5...Driver, 6...Switch, 7
...Main body, 8...Outer blade locking point, 8'...Locking piece,
8″...locking hole, 9...inner blade push-up spring, 10...
Outer blade side edge, 11...Inner surface, 12...Bending portion, 1
3...Inner cutter bottom surface, 14...Outer cutter holding part, 15...
Hole, 16... Pressing plate, 17... Spring, 18... Screw, 19... Elastic body, 20... Pressing plate, 21...
Outer blade mounting bracket, 22...spring. Applicant Matsushita Electric Works Co., Ltd. Guto, \, ゛ Ding\ Agent Patent attorney Toshio Takayama 6' (and one other person) Figure 2 (B) Figure 3 (B) Figure 4 (B)

Claims (5)

[Claims] (1) An outer cutter that is curved in a U-shape and is locked to the outer cutter frame at its end, and an inner cutter that is placed inside the outer cutter and slides in contact with the inner peripheral surface of the outer cutter. A reciprocating electric shaver equipped with blades, characterized in that a pressing means is provided for pressing inward at an intermediate position between an outer blade locking point that locks the outer blade to the outer blade frame and a bottom surface of the inner blade. A reciprocating electric razor. (2) The reciprocating electric shaver according to claim 1, wherein the angle of the inner surface of the outer cutter frame that locks the outer cutter is reduced as a means for pressing the outer cutter inward. (3) A patent claim in which, as means for pressing the outer cutter inward, a spring with a pressing plate attached is inserted into a hole provided in the outer cutter frame that locks the outer cutter, and the spring is pressed from the opposite side with a screw. A reciprocating electric shaver according to item 1. (4) The reciprocating electric shaver according to claim 1, wherein an elastic body is provided between the locking hole of the outer cutter and the blade hole as means for pressing the outer cutter inward. (5) The reciprocating electric shaver according to claim 1, wherein a pressing plate is provided between the locking hole of the outer cutter and the blade hole as means for pressing the outer cutter inward.