JPS6126389B2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a rotary electric razor.

Conventionally, in this type of rotary electric razor having a so-called twin-blade inner cutter and having a simple structure, a razor is press-fitted onto a drive shaft 4' of a motor 2', as shown in FIGS. 4 and 5. Inner blade base 5'
Inner cutters 12', 13' having substantially the same thickness are held in pairs, respectively, and the inner cutters 12', 13' are attached to the inner cutter base 5'.
It is pressed against the inner surface of the outer cutter 19' by the spring force of push-up springs 12' and 13' attached to the lower surface.

However, in this configuration, the inner cutters 12', 1
Since the 3' part is thin with the same thickness, the blade tends to chip when the hair is thick. In addition, when the outer cutter 19' is allowed to move in the axial direction to improve skin contact, the inner cutter 12', Unless the inner cutters 12' and 13' are configured to move in the axial direction, the inner cutters 12' and 13' cannot come into elastic contact with the outer cutter 19', and the push-up springs 7' and
It was difficult to adopt such a structure due to the strength of the 7".

SUMMARY OF THE INVENTION An object of the present invention is to provide a rotary electric razor that eliminates the above-mentioned drawbacks, can adequately handle thick beards, and can perform good shearing even when the outer blade is movable in the axial direction. shall be.

The present invention will be described below with reference to the drawings.

1 and 2 show an embodiment of the present invention, in which 1 is a body in which a motor 2 is installed, and a drive shaft 4 extends upward from the motor 2 through an intermediate partition plate 3. It has been extended. The drive shaft 4
A shaft portion 6 of the inner cutter base 5 is attached to the shaft portion 6 so as to be movable in the axial direction, and a push-up spring 7 whose one end is in contact with the upper end of the drive shaft 4 is installed inside the shaft portion 6. It is pushed upward in the axial direction. An inner cutter mounting protrusion 9 is protruded from the disk portion 8 of the inner cutter base 5, and the inner cutter mounting protrusion 9 has a thick inner cutter 10 and a thin inner cutter 11 extending in the axial direction. Through-holes 12 and 13 are drilled in parallel to each other into which the two can be inserted.

One of the through holes 12 is arranged so as to be located forward in the rotational direction, and the through hole 12 is further connected with a horizontal hole 14 extending at right angles to the through hole 12. The locking part 15 expanded on the blade 10 is press-fitted and locked, and the thick inner blade 1
A blade portion 16 slightly inclined in the direction of rotation of the blade 16 projects upward in the axial direction. Also, the other through hole 13
The thin inner cutter 11 inserted into the inner cutter 11 has a blade portion 17 that is slightly inclined in the direction of rotation and projects upward in the axial direction, and its lower end projects downward in the axial direction, and one end is connected to the disk portion 8. It is locked to the free end of a push-up spring 18, which is fixedly provided through a locking pin. Reference numeral 19 denotes an outer cutter on which the thick inner cutter 10 and thin inner cutter 11 are elastically contacted, and the outer circumferential part is fixed to an outer cutter frame 20, and the outer cutter frame 20 is attached to the upper end of the body 1. They are screwed together.

To further explain the operation of the present invention, now motor 2
When the is driven, the drive shaft 4 is rotated, and the inner cutters 10 and 11 are slid and rotated on the inner surface of the outer cutter 19 via the inner cutter base 5, so that when the skin is placed on the outer cutter, a shaving operation is performed. I can do it. In this case, the thick beard can be sheared by the strong and thick inner blade 10 located at the front in the direction of rotation, and the thin inner blade 11 will not be affected.
The blade portion 17 will not be damaged. Also,
The outer cutter 19 is pressed, and accordingly the thick inner cutter 10
Even if the thin inner cutter 11 is pushed down slightly in the axial direction, the thin inner cutter 11 is supported by the free end of the push-up spring 7 and is allowed to move in the axial direction, so it continues to be in close contact with the outer cutter 19, resulting in a sharp shave. It will not be drastically reduced.

FIG. 3 shows another embodiment of the present invention, in which reference numeral 21 denotes a body in which a motor 22 is installed, and a drive shaft 24 extends upward from the motor 22 through an intermediate partition plate 23. ing. The drive shaft 2
A connecting body 24a is fixedly attached to the connecting body 4, and a joint body 24c is connected to the connecting body 24a via an ear piece 24b. A push-up spring 27 whose one end is locked to the coupling body 24a is installed inside the joint body 24c, and a push-up force is constantly applied to the joint body 24c. Further, an engagement recess 24d that opens upward is formed in the upper part of the joint body 24c,
The bottom surface of the engagement recess 24d is formed with a spherical concave surface.

Reference numeral 25 denotes a disk-shaped inner cutter base, and a spherical protrusion 25a that matches the bottom surface of the spherical concave surface of the engagement recess 24d is provided on the lower surface of the center, projecting downward, and has a plurality of sets of inner cutters forming so-called twin blades. 30,3
1 is supported. One of the inner cutters 30 is thick and the other inner cutter 31 is thin, and the supporting structure is substantially the same as the embodiment shown in FIGS. 1 and 2. Blades 30, 31
is pressed against the inner surface of the outer cutter 39. The outer cutter 39 itself has a central portion fixed to a disk portion 39b of the outer cutter stator 39a, which also functions as a display portion.
The lower part of the outer cutter stator 39a shaft part 39c is bifurcated into two or branched parts, and is inserted into a receiving hole 39d drilled in the center of the inner cutter base 25, allowing the inner cutter base 25 to rotate freely. At the same time, the lower end of the shaft portion 39c is locked in the receiving hole 39d and is prevented from coming out. Further, the outer peripheral portion of the outer cutter 37 is held by an outer cutter frame 40, and the outer cutter frame 40 is provided so as to be movable in the axial direction with respect to the upper end portion of the body 1.

In this embodiment as well, when the motor 22 is driven, the drive shaft 24 is rotated and the inner cutter base 25 is interlocked via the connecting body 24a and the joint body 24c, so that the inner cutter 30, Since the blade 31 is slid and rotated, a shaving operation can be performed by applying the skin to the surface of the outer blade 39. Further, the outer cutter 39 held by the outer cutter frame 40 is movable in the axial direction because the outer cutter frame 40 is slidable relative to the body 21. In this case, even if the outer cutter 39 moves downward in the axial direction, the push-up spring 2 installed inside the joint body 24c
7 absorbs this movement and does not substantially affect the spring force of the push-up spring 38 that is locked to the inner cutter.
Even if the outer cutter 39 is configured to be movable in the axial direction, the shaving quality during operation will not be significantly reduced. Other operations are substantially the same as in FIGS. 1 and 2.

According to the rotary electric razor of the present invention configured as described above, it is possible to smoothly shave off thick beards, maintain a good shave, and achieve remarkable effects such as improved usability.

[Brief explanation of the drawing]

Fig. 1 is a simplified sectional view of the rotary electric razor of the present invention, Fig. 2 is an enlarged sectional view of the same portion, Fig. 3 is a simplified sectional view of another embodiment of the invention, and Fig. 4 is a simplified sectional view of the conventional example. 5A is a plan view of the same portion, and FIG. 5B is a bottom view of the same portion. DESCRIPTION OF SYMBOLS 1... Body, 2... Motor, 3... Intermediate partition plate, 4... Drive shaft, 5... Inner blade base, 6... Shaft part, 7... Push-up spring, 8... Disc part, 9 ……
Inner blade mounting protrusion, 10, 11... Inner blade, 12, 13
...Through hole, 14...Horizontal hole, 15...Locking part, 1
6, 17...blade portion, 18...push-up spring, 19...
Outer blade, 20... Outer blade frame.

Claims (1)

[Claims] 1. An electric razor in which an inner cutter base is linked to the drive shaft of a motor, and the inner cutters, which are supported in pairs on the inner cutter base to which a pushing force is applied, slide and rotate on the inner surface of the outer cutter, One inner cutter located at the front in the rotational direction is provided thickly, and the other inner cutter located at the rear in the rotational direction is provided thinly, and the thick inner cutter is directly fixed to the inner cutter base, A rotary electric razor characterized in that the thin inner cutter is supported by a free end of a push-up spring whose one end is fixed to the inner cutter base.