JPS6332697Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] This invention relates to an electric shaver that uses flexible rectangular outer blades stretched in an arch shape, and specifically relates to improvement of the outer blade structure. It is.

[Conventional technology]

In this type of electric shaver, for example, a reciprocating electric shaver, as shown in FIG. 7, the inner cutter body 50 extends linearly from one end to the other end in the axial direction, in other words, in the reciprocating direction (direction of arrows a and b). By forming the protruding ribs 51, 51 on the outer cutter 52 and forming a large number of slits 53 in the protruding rib 51, the long hair that tends to lie down on the protruding ribs 51, 51 is raised and the slits are removed. 5
3 has been proposed to capture and shear.

[Problem that the invention attempts to solve]

However, in the above configuration, both ends 51a and 51b of each protruding rib 51 extend to both ends of the outer cutter 52, and each of the ends is open.
The above-mentioned protruding rib 5 in a stretched state on the outer blade holder 54
The open ends 51a and 51b of the blades 1 and 51 protrude from the outer periphery of the vertical walls 54a on both sides of the corresponding outer cutter holder 54 as shown in FIG. Furthermore, if the protruding open ends 51a, 51b come into contact with the skin, the skin may be injured. In order to prevent this, both side vertical walls 54a, 54 of the outer cutter holder 54 are
It is conceivable to form each outer periphery of part a with a certain height as shown by the chain lines in FIGS. Attempts to make contact are thwarted and the contact area, or effective shear area, is reduced.

Further, both ends 51a and 51b of the protruding rib 51
is an open structure, the upward force of the inner blade body 50 receiving the spring force causes the protruding rib 51 to move to the tenth position.
It is easy to expand from the state shown by the chain line in the figure to the state shown by the solid line,
When it is expanded excessively, the edge portion 55 on the inner surface hits the cutting edge portion 56 of the inner blade body 50, and the cutting edge portion 5
6 may be damaged.

[Means for solving problems]

Therefore, this invention is an electric shaver in which a flexible rectangular flat plate-shaped outer cutter is stretched in an arch shape, and an inner cutter body is slid on the inner surface of the electric shaver. A protruding rib having a large number of slits facing is formed from one end of the outer cutter to the other end of the outer cutter in the axial direction, and both ends of each rib in the axial direction are closed, and a flat part is provided at the front and rear of each rib. At the same time, this flat part is located on a line connecting the outer cutter and the fixed base of the locking part at the opposing position for attaching the outer cutter to the outer cutter holder, thereby preventing abnormal deformation of the outer cutter. Not only is there no
An electric razor that prevents hair from breaking out and feels good on the skin can be obtained.

〔Example〕

An embodiment of this invention will be described below with reference to the drawings.

In FIG. 1, 11 is a main body case made of synthetic resin or the like, 12 is an outer cutter holder fitted to the upper end of the main body case 11, and an outer cutter 13 is stretched over this outer cutter holder 12. Reference numeral 14 denotes a motor housed within the main body case 11, and an eccentric shaft 16 is fixed to a rotating shaft 15 of the motor 14. 17 is a vibrator that is driven by the eccentric shaft 16 via a lever 18, and a drive rod 17a is protruded from the top surface of this vibrator 17.
An inner blade holder 19 is connected to the tip of a. 2
Reference numeral 0 denotes an inner cutter body formed by supporting a large number of inner cutter blades 21 in a skewered manner with a pipe 22 or the like. The rotary shaft 15 of the motor 14 is pressed against the inner surface of the outer cutter 13.
The rotation causes reciprocation in the directions of arrows a and b.

As shown in FIG. 2, the outer cutter 13 is molded into a rectangular shape from a flexible metal plate by etching, press working, electroforming, or the like. The outer cutter 13 is located at both ends in a direction perpendicular to the axial direction of the inner cutter body 20, in other words, in a direction perpendicular to the reciprocating direction (direction of arrow c). For example, a pair of continuous protruding ribs 24, 24 are formed toward the end portion 13b, and each protruding rib 24 is formed with a large number of slits 25 that extend in a direction perpendicular to the axial direction. Both ends in the direction are closed, and flat portions 26, 26 remain at the front and rear of each rib 24 in the axial direction, respectively.

Reference numeral 28 denotes a reinforcing plate for the outer cutter 13. At the four corners of the outer cutter 13, engaging portions 29 for mounting to the outer cutter holder 12 are formed by extending from thick fixing bases 30, 30. The fixing bases 30, 30 of the engaging portions 29 at the front and rear of the ribs 24 in the axial direction and at the opposing positions are
Flat portions 26, 26 are formed on the lines connecting the spaces.

Note that 27 is a small hole formed in almost the entire area of the outer cutter 13 except for the protruding rib 24. Above outer blade 13
As shown in FIG. 4, the blade is curved in the above-mentioned orthogonal direction and stretched over the outer cutter holder 12 in an arch shape.

In the above structure, when the outer cutter 13 is pressed against the skin and sheared, the lying long hair is raised by the protruding ribs 24, 24, and captured in the slit 25 in this state.

Here, each rib 2 in the axial direction of the inner blade body 20
Since the flat portions 26, 26 are left at the front and rear of the rib 4, both ends of each rib 24 are closed.
Therefore, each of the ribs 24 does not expand due to the upward force of the inner cutter body 20, and the sliding movement between the outer cutter 13 and the inner cutter body 20 is maintained properly.

Furthermore, since both ends of the protruding ribs 24 are closed, it is possible to prevent hair from blowing out during shearing, and it also feels good against the skin. There is no need to hide the protruding ribs 24, so a wide effective shearing area can be secured.

Furthermore, when the outer cutter 13 is attached to the outer cutter holder 12 in an arch shape, the pushing up force from the inner cutter body 20 that the outer cutter 13 receives when attached is supported by the locking part 29. By arranging the flat portions 26, 26 on the line connecting the locking portions 29 where the ribs 24 act most strongly, the expanding deformation of the ribs 24 is suppressed, a predetermined arch shape is maintained, and the sliding with the inner cutter body 20 is prevented. Not only can the contact be made uniform, but also the cutting edge of the inner blade body 20 can be prevented from hitting.

By the way, the protruding ribs 24 are not limited to being continuous from one end 13a to the other end 13b of the outer cutter 13, but may be formed intermittently as shown in FIG. 5, or may be formed intermittently as shown in FIG. Multiple rows of protruding ribs 24
It is also possible to dispose the hairs while being shifted from each other in the axial direction, and in this case, the long hairs that are about to pass through the flat portion 26 can be reliably captured.
Further, these flat portions 26 may be provided with small holes for introducing bristles, and the number of the small holes may be set within a range that allows the outer cutter 13 to bend in an arch shape.

Note that the outer cutter 13 can also be applied to a rotary type in which a rolled inner cutter body having a spiral cutter is rotated.

〔effect〕

As described above, this invention provides an electric shaver in which a flexible rectangular flat plate-shaped outer cutter 13 is stretched in an arch shape, and an inner cutter body 20 is slid on the inner surface of the electric shaver. protruding ribs 24, 2 having a large number of slits 25 oriented in a direction crossing the direction;
4 is formed from one end 13a of the outer cutter 13 in the axial direction to the other end 13b, and both ends of each rib 24 in the axial direction are closed, and flat parts 26, 26 are formed on the front and rear thereof, respectively. , the flat portions 26, 26 form a locking portion 2 at an opposing position for attaching the outer cutter 13 to the outer cutter holder 12.
By configuring it to be located on the line connecting the fixed bases 30 and 30 with the outer cutters 13 of 9 and 29,
It can prevent hair from blowing out and scratches on the skin due to the open ends of the conventional protruding ribs, and it also feels good against the skin, especially when the outer cutter 13 is stretched in an arched shape. The pushing up force is applied to the locking part 29,
29, this locking portion 29,
Rib 24 on the line connecting fixed bases 30, 30 of 29
Since the part is removed and the flat parts 26, 26 are made,
It is possible to prevent the cutting edge of the inner cutter body 20 from getting caught due to the expanding deformation of the ribs 24.

[Brief explanation of the drawing]

Fig. 1 is a cutaway front view showing an example of the electric shaver according to this invention, Fig. 2 is a perspective view showing the outer cutter of the electric shaver, Fig. 3 is an enlarged perspective view of the main parts of the outer cutter, and Fig. 4 The figure is an explanatory diagram of the stretched state of the outer cutter, Figures 5 and 6 are plan views of the outer cutter showing modifications of the same essential parts, and Figures 7 to 10 are explanatory diagrams of the conventional example. . 12...Outer blade holder, 13...Inner blade, 13a...
...One end, 13b...Other end, 20...Inner blade body,
24... Projection rib, 25... Slit, 26...
Flat part, 29...Locking part, 30...Fixing base,
a, b...axial direction, c...cross direction.

Claims (1)

[Scope of utility model registration request] In an electric shaver in which a flexible rectangular flat plate-shaped outer cutter 13 is stretched in an arch shape, and an inner cutter body 20 is slid on the inner surface of the outer cutter 13, there are a plurality of blades oriented in a direction perpendicular to the axial direction of the inner cutter body 20. Projection ribs 24, 24 having slits 25 are formed from one end 13a of the outer cutter 13 in the axial direction to the other end 13b, and both ends of each rib 24 in the axial direction are closed, and the front and rear sides thereof are Flat portions 26, 26 are respectively formed, and the flat portions 26, 26 are fixed bases of locking portions 29, 29 at opposing positions to the outer cutter 13 for mounting the outer cutter 13 on the outer cutter holder 12. An electric razor located on the line connecting 30 and 30.