JPS58103486A - Outer blade body for rotary 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 The present invention relates to an outer blade body of a rotary electric shaver.

When attaching a net-like outer cutter to a frame, it is generally attached by caulking or simultaneously molding the frame to the mounting boxwood around the outer cutter, but if this is done alone, there is a risk that the outer cutter may roll due to the rotational force or cutting force of the inner cutter. Because of this, the conventional mounting method was
You can create unevenness on the mounting boxwood of the outer blade and swage the frame onto it, or make the mounting peg a polyhedron to create a catch between it and the frame. By inserting and fixing the outer cutter into the protrusion, the outer cutter is designed to prevent rotation and lock without changing the spherical shape of the outer cutter.

However, because the width of the outer cutter mounting boxwood is narrow due to design constraints, implementing the above method requires uniformity, especially in the case of a frame made of plastic material, due to temperature fluctuations.
Under cyclical environments such as humidity, the attachment retention force changes significantly. In addition, from the perspective of manufacturing the outer blade, providing unevenness (rigs) or openings on the mounting brackets causes stress (elongation, compression) concentration during spherical molding, which interferes with normal spherical molding. There were drawbacks.

Therefore, an object of the present invention is to provide a rotary electric shaver that ensures the rotation of the outer cutter without making it difficult to install the outer cutter, reduces the noise accompanying the rotation of the outer cutter, and improves the cutting quality. The purpose of the present invention is to provide an outer blade body.

A first embodiment of the invention is shown in FIGS. 1 and 2.

That is, the outer cutter body of this rotary electric shaver has a large number of annular holes 4 formed outside the outermost cutter hole 31 of the cutter holes 3 on the inside of the collar 2 of the net-like outer cutter l. , a frame 5 made of metal or plastic is provided with a presser portion 6 for pressing the upper surface of the collar 2 and a lip 7 for engaging with the hole 4. To install the outer cutter l, if the frame 5 is made of metal, place the collar 2 of the outer cutter l on the mounting surface 5a of the frame 5 and attach the lip 7.
is fitted into the hole 4, and the presser portion 6 is crimped onto the upper surface of the collar 2 by caulking. In addition, if the frame 5 is made of glass, the number of lips 7 that fit into the hole 4 due to simultaneous molding is 2.
A presser portion 6 is formed. 8 is an inner cutter frame, 9tj is a push-up spring, and 10 is an inner cutter.

With this structure, the outer cutter 1 can be reliably attached to the frame 5 with the holding part 6, and the rotation of the outer cutter can be reliably stopped by fitting the hole 4 and the lip 7.
Since there is no need to ensure rotational holding force with the brim, and there is no need to modify the brim shape of the outer cutter, it is easier to attach the outer cutter 10, and the entire circumference of the brim 2 is Improves the accuracy of 91 spherical surface finishing, which enables uniform stress drawing. Furthermore, it is possible to secure a high rotational holding force that could not be obtained by fixing with the conventional narrow brim K.

A second embodiment of the invention is shown in FIGS. 3-5.

In other words, the outer blade of this rotary electric shaver is
In this embodiment, the lip 7 is made to protrude beyond the hole 4 by a predetermined amount to form a raised portion 11. That is, when shaving by pressing the surface of the outer cutter 10 against the skin, when the outer cutter 1 is run along the skin P as shown in FIG. 5, the raised portion 11 moves while pressing against the local part of the skin P. At this time, the action of squeezing out the skin P and the action of raising the nape are continuously generated, and the raised hair is sent from the outer periphery to the inner periphery and cut. The introduction into the blade hole 3 is made efficient.

A third embodiment of the invention is shown in FIGS. 6 and 7.

That is, in the outer blade body of Jin's rotary electric shaver, in place of the hole 4 of the first embodiment, a concave part 12 is formed inside the outer blade 1 and a convex part 13 on the outside thereof by press working. . The rig 7 engages with the concave portion 12, and the convex portion 13 serves as the raised portion of the second embodiment.

A fourth embodiment of the invention is shown in FIGS. 8 and 9.

That is, in the outer cutter body of this rotary electric shaver, the raised portion 11 of the second embodiment further projects outward in the radial direction of the outer cutter 1 to form a comb portion 14. That is, the comb portion 14 has the same effect as a comb provided around the outer cutter 10, and has the function of arranging the hair and sending it to the cutter hole 3.

As described above, the outer cutter body of the rotary electric shaver of the present invention has a retaining opening formed inside the brim of the outer cutter, and a protrusion formed on the frame to make them fit together. It is possible to stop the rotation of the outer cutter without making it difficult to set the outer cutter, which has the effect of improving cutting quality and reducing noise and residue.

[Brief explanation of the drawing]

FIG. 1 is a half-sectional view of a first embodiment of the invention. FIG. 2 is a perspective view of the main part thereof, FIG. 3 is a partial cross-sectional view of the second embodiment, and FIG. 4 is a perspective view of the main part thereof. FIG. 5 is a cross-sectional view of the third embodiment, FIG. 6 is a half-sectional view of the third embodiment, and FIG. 7 is a perspective view of the main part thereof. Figure 8 is a half-sectional view of the fourth embodiment, and Figure 9 is a perspective view of the main parts thereof. 1... Outer blade, 2... Mounting collar, 4... Hole (engaging recess). 5...frame, 6...1! -Ebe, 7...Rep (protrusion). 11... Raised portion, 12... Engagement recess, ]3... Convex portion, 14... Comb portion Fig. 4 Fig. 7 Fig. 9

Claims (1)

[Scope of Claims] (1) A net-like outer cutter having a mounting collar on its peripheral edge and an engagement recess formed inside the outer cutter, a retaining portion for attaching the outer cutter of the mounting collar, and the retaining opening. An outer blade of a rotary electric shaver, comprising a frame having a protrusion that fits into the outer blade of the rotary electric shaver. a) The outer cutter body of the rotary electric shaver 9 according to claim 1, wherein the retaining opening portion is a hole, and the eastern portion protrudes from the hole by a predetermined amount to perform a slight hair movement. 0) The outer cutter body of a rotary electric razor according to claim 1), wherein the protrusion further protrudes outward in the radial direction of the outer cutter to perform a hair trimming operation. (4) The engagement recess is formed on the inside of the outer blade by pressing, and its outer surface Kl! An outer cutter body of a rotary electric shaver according to claim (1), wherein the outer cutter body of a rotary electric shaver is operated by a raised convex portion.