JPS63181787A - Blade of 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 shaver blade.

(Background Art) FIG. 5 is a partially cutaway sectional view of a blade portion of a conventional reciprocating electric shaver (hereinafter simply referred to as an electric shaver). In the figure, reference numeral 1 denotes a motor, and a drive element 2 is pivotally supported on the motor 1 via an eccentric cam. At the tip of the drive element 2, an inner cutter body 3 having a plurality of inner cutter blades connected to each other is connected to a slider 4, It is rotatably attached by a pin 5 and a joint 6, and is pressed against the outer cutter 8 by a push-up spring 7. Further, the outer cutter 8 is slidably fitted to a mounting claw 10 protruding from the outer cutter frame 9 through a mounting hole 12 to a mounting plate 11 provided on the periphery of the outer cutter 80.

Figures 6 and 7 are diagrams showing how the electric shaver is used. When the outer blade 8 is pressed against the skin S, the blades (the collective term for the inner blade 3 and the outer blade 8) can be freely moved as shown in Figure 6. The structure is such that the inner cutter body 3 and the outer cutter 8 always maintain sliding contact. Also, the 8th
Figures (8) I (b) and (9) (a) and (b) are enlarged views showing how the outer cutter 8 fits into the mounting hole 12.

The state of use of the electric shaver will be explained with reference to FIGS. 6 to 9. If the outer blade 8 is strongly pressed against the skin S,
The float limit of the outer blade 8 is the upper surface of the mounting claw 10 - 13
This is the interval until it comes into contact with the mounting hole 12. On the other hand, the circular blade body 3 has a structure that allows it to swing by a greater amount than the float amount A. Such sliding contact between the inner cutter body 3 and the outer cutter 8 causes the outer cutter 8 to deform, creating a gap shown by B in FIG. 7. If the outer cutter 8 is used for a long period of time while being deformed in this way, it will become permanently deformed.
In addition to deteriorating the cutting quality, abnormal wear due to sliding contact of the inner blade body 3 may occur, and the outer blade may break.

(Objective of the Invention) The present invention has been proposed in view of the above points, and its purpose is to provide an outer blade with a good cutting ability even for people who often press one side when shaving. The purpose is to prevent tearing and provide safe electric razor blades.

(Disclosure of invention) Hereinafter, the present invention will be explained along with the drawings.

1 and 2 are partially cutaway sectional views showing one embodiment of the present invention. In the figure, members given the same reference numerals as in FIG. 6 have the same functions as in the conventional example, and therefore their explanations will be omitted. In the figure, reference numeral 14 denotes a protruding portion protruding from the center of the joint 6 connected to the drive element 2. This abutting portion 14 is connected to the drive element 2
The tips 14a, 1 are shaped so as to face both sides of the
4b is arranged so as to come into contact with the side surface of the drive element 2 as the inner blade body 3 swings. FIG. 2 is a diagram showing the state in which the electric shaver is used, and shows a state in which the inner blade body 3 is swung by a single pressing force against the skin.

As shown in the figure, when the inner blade 3 swings, the tip 14m of the protrusion 14 provided on the joint 6 comes into contact with the side surface of the driver 2.

In this case, with respect to the float iA shown in FIG. 9, the amount of swing C of the inner blade body 3 shown in FIG. This prevents the outer cutter 8 from deforming. That is, as the inner cutter body 3 swings, the tips 14a s 14b of the protruding portion 14 come into contact with the side surface of the joint 6, so that the attachment claw 10 does not come into contact with the edge of the attachment hole 12, and the inner cutter As the grade of body 3 swings, it comes into sliding contact.

Next, FIG. 3 shows another embodiment, in which an abutment pin 16 is attached to the hair receiving plate 15.
The abutment pin 1 is provided such that the tips 16a and 16b of the abutment pin 16 come into contact with the joint 6 in accordance with the swinging of the inner cutter body 3.
6 is arranged to regulate the amount of swing of the inner blade body 3.

Furthermore, FIGS. 4(a) to 4(c) are views showing another embodiment, which is an embodiment in which the occurrence of a gap between the outer cutter and the inner cutter due to the deflection of the inner cutter base is prevented. The same figure (a) shows the state without whisker cutting resistance, the same figure (b) shows the state with whisker cutting resistance, and the same figure (
c) is a cross-sectional view taken along line B-B in the same figure (,). At both ends of the inner cutter body 3, a substantially center of gravity of the inner cutter body 3 is supported by lips 6a provided at the ends of the joint 6, and a driving force is applied to the inner cutter body 3. Furthermore, outer support protrusions 6b and inner support protrusions 6C of the inner cutter base 3& are arranged at four locations around the center of the joint 6. This outer support protrusion 6b is made higher in height than the inner support protrusion 6C, and when there is no resistance to hair cutting, only the outer support protrusion 6b comes into contact with the inner blade base 3a, and resistance to hair cutting is applied, and the inner blade When the base 3a is bent, the inner support protrusion 6C
Since the inner cutter base 3a has four support points in contact with the inner cutter base 3a, it acts as if the inner cutter base 3a has increased rigidity. As a result, there is no gap between the sliding contact portion between the inner blade of the inner cutter body 3 and the outer cutter (not shown), so that sufficient sharpness can be ensured.

Further, as shown in FIG. 6(e), the hook 6a of the joint 6 is firmly fixed to the side lip 3b of the inner cutter body 3 by heating, and is connected without any gap.

As described above, the inner cutter base 3a is supported by the joint lip 6a, and the contact portion between the inner cutter blade and the outer cutter (not shown) of the inner cutter body 3 and the point of application of cutting force (point of application of sliding force) distance t from
This reduces the moment generated during driving, eliminates the oscillating motion caused by inertia when reversing the oscillating motion, and improves cutting quality. There is no rocking when driving, there is no vibration between the joint and the inner cutter base, and it is supported at four support points on the joint during cutting, so the inner cutter base does not escape and has a good cutting quality. , an inner cutter with low noise can be obtained.

(Effects of the Invention) For people who apply a large pressing force on one side when shaving, the outer blade is prevented from deforming and its cutting life is extended, and the outer blade is prevented from breaking due to abnormal wear, increasing safety.

[Brief explanation of the drawing]

1 and 2 are partially cutaway sectional views showing one embodiment of the present invention, FIG. 3 is a partially cutaway sectional view showing another embodiment of the present invention, and FIGS. 4(a) to (c) ) is a diagram showing still another embodiment of the present invention, FIGS. 5 to 9 are diagrams showing a conventional reciprocating electric shaver, FIGS. 5 to 7 are partially cutaway sectional views, and FIG.
9 are enlarged views showing the fitting of the outer cutter and the outer cutter frame. 2... Drive element, 3... Inner blade body, 3a... Inner cutter base, 3b... Side lip, 6... Joint, 6b... Lip, 6b... Outer support protrusion, 6C...Inner support protrusion, 8...Outer blade, 9...Outer blade frame, 10...Mounting claw, 11...Mounting plate, 12...Mounting hole, 13...
・Top surface of mounting claw, 14...Abutment part, 14a, 14
b...Tip of abutting portion, 15...Hair receiving plate, 16...
Abutment pins, 16a, 16b...tips of abutment pins.

Claims (1)

[Claims] In a reciprocating electric shaver blade in which the inner cutter is swingably attached to the tip of the driver and the outer cutter is attached to the outer cutter frame so that it can float, the amount of swing of the inner cutter is smaller than the float amount of the outer cutter. A reciprocating electric razor blade characterized by: