JPH03231697A - Edge part of rotary type electric shaver - Google Patents

Abstract

PURPOSE:To obtain an excellent performance of quick shaving and deep shaving by a method wherein the title edge part is composed of both an outer cutting edge for which a plurality of meshy edge parts, each of which is almost in the shape of a circle, are formed, and a plurality of rotary edge parts, each of which is independent and is located facing to each of the meshy edge parts. CONSTITUTION:For an outer cutting edge 1, its section is formed in the shape of a dome, and two dome parts are integrally joined at a central part 2 and on each of the dome parts, a number of beard-guiding pinholes are formed and it is made a meshy a edge part 8. A rising part 4 and a peripheral part 5 are formed around the outer cutting edge 1, and are fixed at a frame 6 for the outer cutting edge part. Two inner cutting edges 9 are separately formed facing to each of the meshy edge parts 8, and each of the inner cutting edges 9 is composed of both a plurality of inner edge members 11, each of which is lifted by a spring 10, and an inner edge-supporting member 13 on which the inner edge members 11 are held and is fitted to a rotary shaft 12. Under each of the rotary shafts 12, a gear 14 is separately formed and the gears 14 are engaged with a reduction gear 16 fixed on the motor shaft of a motor 15, and transmits the rotation of the motor. At the central part 2 of the outer cutting edge 1, slit parts 21 extended on both the dome parts are formed. Curl beards or growing beards are guided into the slit parts without being depressed, and are shaved by the inner edge members 11, of which the outer ends are beyond the central part 2 with each other.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a blade of a rotary electric shaver.

[Prior Art] The blade of a conventional rotary electric shaver has a −RΩ-like structure, which is composed of a dome-shaped outer cutter 1 and a rotating inner cutter 11 as shown in FIG. The diameter of outer cutter 1 is ψ30~φ
In order to ensure both the rigidity of the outer cutter and the good texture with a diameter of about 35 mm, the radius of curvature of the dome is R30 to 50 mm, and the thickness is about 100 LL. The inner cutter body made up of several pieces is pushed up from below by a spring 10 and brought into close contact with the outer cutter l. 6 is the outer cutter frame, 12 is the rotating shaft, 13
1 is an inner blade support, and 15 is a motor.

On the other hand, the blade part of the post-return type (not shown) is 45 to 50 m.
Since the outer cutter is pushed up by a large number of inner cutters, the outer cutter may have a weak rigidity, and the outer cutter has a thickness of approximately 50 μm. One curvature is 83 to 8 mm.

(Problem to be solved by the invention 1 However, in the blade of the above-mentioned rotary electric shaver,
The outer blade is 2 thicker than the reciprocating blade part mentioned above.
It is said to be about twice as large, resulting in poor shaving performance, and because the diameter is small compared to the reciprocating blade, the width that can be shaved at one time is narrow, resulting in poor shaving performance. Furthermore, if the diameter is increased in order to eliminate this drawback, the strength of the outer blade will be weakened, and the thickness of the outer blade will need to be further increased, which will inevitably result in poor shaving performance. Also, if the diameter is increased, the load will increase in proportion to the diameter, and of course the required power will also increase proportionally.At the same time, the weight of each inner blade will increase, and the influence of centrifugal force will also increase. - As is known from boat fishing, the outer circumferential side has poor adhesion to the outer blade, resulting in poor cutting ability. There are some problems that cannot be solved.

In addition, although the reciprocating top section is superior in terms of quick and close shaving, it has a small curvature, a large number of inner blades, and a small gap between the inner blades, so cut hairs may scatter outside. The problem is that it is easy.

Therefore, the present invention is intended to solve these problems, and its purpose is to provide an electric razor that has excellent quick and precise shaving properties, is strong in power, and does not cause hair to fly off. be.

[Means for Solving the Problems] The blade portion of the rotary electric shaver of the present invention includes (1) one outer blade in which a plurality of net blade portions each having a substantially circular planar shape and having a large number of hair introduction holes are formed; It is characterized by comprising a plurality of rotating independent inner cutters arranged corresponding to each mesh blade portion of the outer cutter.

(2) The net blade portions of the outer cutter are arranged in a planar positional relationship such that they touch or overlap each other.

(3) the diameter or height of the top of each net blade portion of the outer cutter;
It is characterized by having different cross-sectional shapes.

[Embodiment] Fig. 1 is a cross-sectional view of the blade of a first embodiment of the present invention, and Fig. 2 is a plan view of the blade. First, the outer cutter 1 has a dome-shaped cross-section. , and each dome part is connected at the central part 2, so that the two dome parts are integrated. Further, in FIG. 2, each dome portion is provided with a large number of whisker introduction holes to form a net blade portion 8. Therefore, the two dome parts are connected through the central part 2, creating a cocoon shape. Further, a rising portion 4 and a peripheral edge portion 5 are naturally formed around the outer cutter 1 and are fixed to an outer cutter frame 6. As described above, in this embodiment, the outer cutter 1 is an integral outer cutter 1 having two dome-shaped mesh blade portions 8 having the same curvature in the diameter of the blade and the height of the top portion 7. 2
is recessed from the top 7.

On the other hand, inner cutters 9 are provided at two locations corresponding to each of the mesh blade portions 8, and each inner cutter 9 holds several inner cutters 11 and inner cutters 11 pushed up by push-up springs 10. It also includes an inner cutter support 13 that engages with the rotating shaft 12.

Furthermore, a gear part 14 is formed below the rotating shaft 12, and has a structure in which it engages with a reduction gear 16 fixed to the motor shaft of a motor 15 to transmit rotation. Further, the gear portion 14
is positioned and held by a bearing 17 and a fulcrum 18 between a whisker debris receiver 19 and a motor mounting plate 20.

In addition, the central part 2 of the outer cutter 1 is provided with a long hole part 21 spanning the dome parts on both sides, and this part is recessed from the top part 7, so when the outer cutter 1 is applied to the skin. , it is possible to introduce a curly beard or a long beard without crushing it, and since the outer end of the inner blade body 11 also extends beyond the central part 2, the beard can be cut reliably. Here, since the two inner cutters 9 rotate synchronously through gear coupling, the inner cutter body 11 does not interfere.

If the blade part is configured as described above, for example, if the diameter of the net blade part 8 is about 20 to 25 mm, the blade part will be about 40 to 50 mm.
Compared to conventional rotary blades, it can be configured to be wider.Of course, compared to conventional rotary blades, the outer blade diameter is smaller, so the thickness can be reduced to obtain the same rigidity. In addition, the diameter of each inner cutter 9 is smaller than that of a conventional rotary cutter, and the load when a hair is formed can be reduced.Furthermore, if a reduction gear is used as in this embodiment, the torque of the motor 15 can be reduced. It can also be relatively increased, and the combination of these two effects can create a powerful rotating blade.

In addition, in the first embodiment, the net blade portion 8 has the same curvature, diameter, and height of the top portion 7, but as in the second embodiment shown in FIGS. 3 and 4, It is also possible to adopt a form in which the net blade portions are not dome-shaped but have the top portions 7 formed in a planar manner, and each of the net blade portions 8 are connected at the central portion 2. The point is that the cross-sectional shape of the net blade portion 8 can be made arbitrarily as long as the rotation of the inner cutter 9 is not hindered. Further, as shown in FIG. 4, the net blade portions 8 may be arranged so as to be in contact with each other, or may be arranged apart from each other. Furthermore, the mesh blade portions 8 can be easily formed at three locations instead of two locations as in the third embodiment shown in FIGS. The height of the inner cutters 9 is changed by a, and the rotation transmission structure allows the central inner cutter to be directly connected to the motor 15, and the other inner cutters to be connected by gears in the rotating direction of each inner cutter 9.

It is also easy to change the rotational speed and the diameters of the central net blade portion 8 and both side net blades 8. Of course, the shapes of the beard introduction holes of each net blade part 8 are changed, for example, the central net blade 8 has small holes for a close shave, and the other blade has long holes suitable for curly beards and long beards. It can also be a blade provided.

Furthermore, FIGS. 7 and 8 show other application examples that enhance the effects of the present invention, where FIG. 7 is a cross-sectional view of the blade, and FIG. 8 is a bottom view of the inside. In the present invention, compared to the conventional rotary blade shown in FIG. 9, even if the diameter of each inner cutter is made smaller, a wider blade part is formed, but conversely, by reducing the diameter of the inner cutter, A facing structure is required. As a means of achieving this, structural examples in which there is only one inner cutter are shown in Figures 7 and 8.
To explain the structure of the figure, a motor 102 is screwed to a case 101 by a motor set screw 109. A connecting shaft 103 is fitted onto the motor 102 . A plurality of through holes 110 are formed in the inner blade support 106, and an inner blade body 105 is inserted into each of the through holes 110. An inner blade spring 107 is fixed to the inner blade support 106,
It has a structure in which the inner blade body 105 is pushed up by the inner blade spring 107. A coiled support spring 108 is inserted into the guide shaft 111 of the connecting shaft 103, and the inner blade support 10
6 guide holes 112 are inserted. Support spring 10
8 is not limited to this location, but the inner cutter support 106 can be pushed up from the connecting shaft 103.The outer cutter 104 has a structure that is screwed onto the case 101.
When stopped, the inner blade 105 is pushed in the direction of the motor 102 and positioned. Along with this, the inner blade spring 107 deflects,
This spring force also moves the inner blade support 106 in the direction of the motor 102, and the position of the inner blade support 106 is determined in a state where the spring force of the support spring 108 is balanced. In this way, since the push-up of the inner cutter body 105 is made up of two types, the inner cutter spring 107 and the support spring 106, even if the diameter of the inner cutter is small, the total spring constant can be made small, so the inner cutter The spring length of the spring 107 can be made small, and a large number of inner cutters 105 can be constructed with a small diameter.Although this drawing shows a case in which there is one inner cutter, it is possible to construct a plurality of inner cutters according to the present invention. It is an effective means to do so.

[Effects of the Invention] As described above, according to the present invention, the outer blade is thinner than the blade of a conventional rotary electric shaver (even if the outer blade is thinner, the rigidity can be maintained, so a close shave can be achieved. Even if they are small, by arranging multiple blades, the effective blade area can be made larger, allowing for faster shaving.In addition, the diameter of each inner blade can be made smaller, and the torque can be increased by reducing the speed with gears, so the power is relatively strong. Naturally, the curvature of the outer blade is sufficient as before, so there is no scattering of hair.

Furthermore, even if you compare it with a rotary blade that has a small-diameter outer and inner cutter each independent of each other, there is no distance between the outer cutters and there are no areas where unshave is left behind. This has the effect of providing a rotary blade that is much cheaper in cost than when the blades are independent.

Furthermore, if the height of the top of the outer blade is not the same, but is made to have different heights so that it can easily match the unevenness of the skin, the conventional reciprocating blade part has the same height throughout the reciprocating type, and it can be adjusted to the unevenness of the skin. It can also solve the problem of difficulty shaving large areas (such as the chin and throat).

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view of the blade showing the first embodiment of the present invention;
The figure is a plan view of the blade shown in FIG. 1, the third section is a sectional view of the blade showing the second embodiment, FIG. 4 is a plan view of the blade shown in FIG. 6 is a plan view of FIG. 5, FIG. 7 is a sectional view of the blade showing another application example, and FIG. 8 is a sectional view of the blade shown in FIG.
FIG. 9 is a bottom view of the inner cutter in the figure, and FIG. 9 is a cross-sectional view of the blade portion showing a conventional rotary cutter.・Outer blade・Central top・Mesh blade portion・Inner blade 2 Fig. 8 N4 Fig. 6 Fig. 9

Claims (3)

[Claims] (1) One outer cutter having a plurality of net blade portions each having a substantially circular planar shape with a large number of hair introduction holes, and a plurality of rotating independent blades arranged corresponding to each of the net blade portions of the outer cutter. A rotary electric razor blade comprising an inner blade. (2) The blade portion of a rotary electric shaver according to claim 1, wherein the mesh blade portions of the outer cutter are arranged in such a relationship that the planar positions of the mesh blade portions are in contact with or overlap each other. (3) The blade portion of a rotary electric shaver according to claim 1, wherein each mesh blade portion of the outer cutter is configured to have a different diameter, top height, or cross-sectional shape.