JPH11267375A - Electric shaver - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electric shaver which enables easy, quick, and smooth shaving by reducing the necessity of the circular movement of the electric shaver during use. SOLUTION: This electric shaver 10 has at least one outer blade 20, at least one inner blade 30, and a single motor 14 rotating both the outer blade 20 and the inner blade 30. Therefore, collapsed hair can be raised by the rotating outer blade 20 and introduced into slits in the outer blade 20 to allow shaving to be achieved very easily, effectively and smoothly. Since the inner blade 30 and the outer blade 20 are driven for rotation only by the single motor 14, the outer shape of the electric shaver 10 can be made more compact than would be if the blades are provided with respective motors 14.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric shaver, and more particularly to a rotary electric shaver.

[0002]

2. Description of the Related Art Generally, in an electric razor, particularly an electric rotary shaver, an inner blade rotates on a lower surface of an outer blade, and hair is cut by a shear force generated by these two blades. In some electric razors, only one shaving unit composed of an outer blade and an inner blade is provided on the shaver head portion, and two or three shaving units are provided on the shaver head portion. Some are provided in the unit, and are called two-headed electric razors and three-headed electric razors, respectively. In a two-head electric shaver, the shaving units are arranged side by side, and in a three-head electric shaver, the shaving units are usually arranged in an inverted regular triangle so as to obtain an optimum shaving effect. In these electric razors currently on the market, only the inner blade is rotated by a motor provided in the shaver housing, and a rotating inner blade and a non-rotating outer blade are configured to be able to be pushed inward during shaving. To obtain the shearing force.

[0003]

SUMMARY OF THE INVENTION As described above,
Since the outer blade, which typically has a radial slit to guide the facial hair, does not rotate, the hair does not easily enter the slit and shaving may not be effective. Therefore, in order to perform smooth and effective shaving, it is common to turn the shaving head (and thus the outer blade) in a circular shape on the face. However, muscular fatigue of the arm with the electric razor can be caused, and conventional electric razors have problems in shaving effects and their use.

Accordingly, it is a primary object of the present invention to reduce the need for circular movement of a shaver during use, thereby providing a compact shaver that allows easy, fast and smooth shaving. It is in. Another object of the present invention is to provide an electric shaver in which a rotating outer blade and a rotating inner blade significantly enhance the effect of raising and taking in hair and the effect of cutting hair. Still another object of the present invention is to act as a "comb" to smoothly erect hair so that it can be taken into a slit formed in the outer blade and further between the outer blade and the inner blade to achieve smooth and quick shaving. To provide an electric razor.

[0005]

SUMMARY OF THE INVENTION The above object of the present invention is as follows.
Unique that has at least one shaving unit composed of an outer blade and an inner blade, and rotates not only the inner blade but also the outer blade by one power source and a series of gears provided between the shaving units. This can be achieved by an electric shaver having the following structure. That is, according to the electric shaver according to the present invention, the outer cutter is provided with, for example, an annular gear on its outer peripheral surface, and the annular gear is driven by a driving gear rotated by a driving gear that rotates the corresponding inner cutter. It is designed to be rotated. Further, according to the present invention,
The outer cutter and the inner cutter can rotate not only in the same direction but also in opposite directions.

In order to achieve the above object, an electric shaver according to claim 1 of the present invention comprises at least one outer blade, at least one inner blade, and a single shaft for rotating the outer blade and the inner blade together. And a power source. This makes it possible to make the outer shape of the electric razor compact because there is only one power source, and the outer blade rotates to make the hair stand up smoothly, so that the hair is erected in the slit of the outer blade, and between the outer blade and the inner blade. For smooth and quick shaving. Further, the at least one outer blade and the at least one inner blade may rotate in the same direction, and the at least one outer blade and the at least one inner blade may rotate in the same direction.
The two inner blades may rotate in different directions.
In particular, when rotating in different directions, there is an effect that the relative speed difference between the outer blade and the inner blade increases, and the shearing force of the hair increases. Further, the at least one outer blade rotates at a lower rotation speed than the at least one inner blade. Specifically, it is preferable that the at least one outer blade is rotated at 50 rpm or less. Preferably, the at least one inner blade and the at least one outer blade rotate at a rotation ratio of about 83: 1. Since the outer blade directly hits the skin, rotating at high speed may damage the skin, and a low rotation speed enough to raise the hair is sufficient.

[0007] The at least one outer cutter is provided with gear means on an outer peripheral surface. Further, the at least one inner blade is positioned inside the at least one outer blade by a blade body mounting frame detachably provided on a shaver housing, and the at least one inner blade is the single power source. , And the at least one outer blade is rotated by second driving means driven by the single driving source.

Further, a transmission means provided between the first driving means and the second driving means and engaged with them is further provided. In addition, the second drive means is, specifically, a gear wheel meshing with the transmission means, a drive shaft coaxially connected to the gear wheel, and at least one outer blade connected to the drive shaft. And an end gear meshing with the provided gear means. Further, a spring means is further provided between the gear wheel and the drive shaft. Further, there is further provided drive shaft support means provided in the shaver housing and supporting the drive shaft so as to allow swinging movement of the drive shaft of the second drive means. Further, the at least one outer blade is rotatably provided and is rotated by a driving unit driven by the single power source.

The outer blade used in the rotary electric shaver according to the present invention is a shallow cylindrical main body having a circular top end face provided with a plurality of hair inlets which open radially. The cylindrical main body is provided with an annular gear fixed on the outer peripheral surface thereof.

The electric shaver according to claim 15 of the present invention is a shaver having a single power source therein.
A head frame provided with a housing, at least one outer blade provided with gear teeth, and at least one inner blade rotated in the at least one outer blade, and attached to one end of the shaver housing; At least one first driving means provided in the shaver housing and rotated by the single power source to rotate the at least one inner blade; and the single driving means provided in the shaver housing and provided in the shaver housing. And second driving means for rotating the at least one outer blade by rotating the power source. The at least one inner cutter may be rotated in one direction, the at least one outer cutter may be rotated in the other direction, and the at least one inner cutter may be rotated in one direction, At least one outer blade may be rotated in the one direction.

An electric shaver according to claim 18 of the present invention is a shaver having a single power source therein.
A head frame provided with a housing, at least one outer blade provided with gear teeth, and at least one inner blade rotated in the at least one outer blade, and attached to one end of the shaver housing; At least one first driving means provided in the shaver housing and rotated by the single power source to rotate the at least one inner cutter in one direction; and at least one first driving means. At least one rotating transmission means and the gear teeth provided in the shaver housing and rotated by the at least one transmission means to provide the at least one outer blade to the at least one outer blade. And second driving means for rotating in the other direction through the second driving means.

According to a razor of the present invention, a shaver having a single power source therein.
A head frame provided with a housing, at least one outer blade provided with gear teeth, and at least one inner blade rotated in the at least one outer blade, and attached to one end of the shaver housing; At least one first drive means provided in the shaver housing and rotated by the single power source to rotate the at least one inner blade in one direction, and one of the at least one first drive means Two transmission means rotated by means and engaged with each other and provided in the shaver housing and rotated by the other of the two transmission means so that the at least one outer blade is connected to the at least one outer blade. An electric shaver, comprising: a second drive unit configured to rotate in the one direction via the gear teeth provided. As described above, in the electric razor according to the fifteenth, eighteenth, and nineteenth aspects, the head frame may further include a relay gear unit that meshes with gear teeth provided on the at least one outer cutter.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail based on preferred embodiments with reference to the accompanying drawings. 1 shows the inside of an electric shaver according to a first embodiment of the present invention, FIG. 2 is an exploded perspective view of a main part thereof, and FIG. 3 is a sectional view thereof. In these figures, the shaver is indicated generally by the reference numeral 10 and the shaver housing 12
And each of the two shaving units includes one outer cutter 20 and one inner cutter 30, and the tip of each inner cutter 30 is in contact with the inner surface of the circular top end wall of the outer cutter 20. . One end of the shaver housing 12 is opened and covered by a detachable head frame 16, in which a mounting plate 12 a and a drive shaft holder 12 are mounted.
b is provided, and on the inner surface of the head frame 16 is provided a blade body mounting frame 12c detachably mounted with mounting screws 12c '. Further provided in the shaving housing 12 are a motor 14 as a single power source activated by a DC and / or AC power supply, a battery 18 for activating the motor 14, and an on / off switch 19 connecting these. ing.

The head frame 16 is a shaver.
The two outer blades 20 are detachably elastically fitted to the housing 12, and each of the two outer blades 20 is located in a circular opening 16 a opened in the head frame 16. Circular opening 16a
Has a slightly larger diameter than the outer cutter 20 and
Is typically constructed of a shallow metal cylinder having a hair inlet 20 'at its circular top end, which is a slit that is radially open, as best shown in FIG. Further, each of the outer cutters 20 is provided with an annular gear 22 which is a gear means. The annular gear 22 is formed of, for example, plastic, and is fixed to the outer peripheral surface of the outer cutter 20, as shown in FIG. As best shown in FIG. 5 (a), the proximal end of the outer cutter 20 is located at the head frame 1
6 is provided in a circular opening 16a opened to the head frame 16 at the inner surface of the outer frame 20, and the annular gear 22 of the outer cutter 20 is connected to the flange 20a of the outer cutter 20 and the head frame 1.
6 so that the outer cutter 20 does not come off the head frame 16.

The two inner blades 30 and the outer blade 20 are provided between the head frame 16 and the blade body mounting frame 12c, and each of the two inner blades 30 has a respective one as understood from FIG. It is located inside the outer cutter 20 and is rotated inside the outer cutter 20 by the motor 14 (as described later). The two inner cutters 30 include a motor shaft gear 14a, two first gear wheels 50, two first drive shafts 60, and a rotation transmission block 3 provided on the inner cutter 30.
2 to the motor 14. These components that rotate the inner cutter 30 are referred to as an inner cutter drive assembly (also referred to as first drive means).

That is, the motor 14 (drive source) fixed to the mounting plate 12a has a motor shaft gear 14a on its output shaft 14 ', and the motor shaft gear 14a is provided with two first gear wheels 50 (see FIG. 3 is only one). Each of the first gear wheels 50 is rotatably provided on each of two first spindles 12x (only one is shown) fixed to the mounting plate 12a, and a hollow hub 52 having a cavity therein is provided at the center thereof. A flange 62 of a first drive shaft 60 (only one is shown) formed and having a hollow hole therein is provided in the hollow hub 52. First drive shaft 6
A flange 62 formed at one end of the first gear wheel 50 is connected to the hollow hub 52 of the first gear wheel 50 to connect the first drive shaft 60 and the first gear wheel 50 coaxially. It is adapted to be rotated by a wheel 50. A coil spring 64 (only one is shown) is provided in the hollow hole of each first drive shaft 60 as an example of a spring means,
Compressed between the first drive shaft 60 and the first gear wheel 50 urges the first drive shaft 60 in the direction of the outer cutter 20.
Accordingly, the flange portion 20a of the outer cutter 20 is pressed toward the head frame 16 by the coil spring 64, and during use of the electric shaver, the outer cutter 20 and the inner cutter 30 are opposed to the urging force of the coil spring 64. It is configured to be able to be pushed into the inside (inward) of the shaver housing 12 together with the one drive shaft 50 (pushable).

That is, the outer cutter 20, the inner cutter 30, and the first drive shaft 60 can be pushed in the direction of the mounting plate 12a during use of the electric shaver.
The gap between the outer surface of the hollow shaft 52 and the inner surface of the hollow hub 52 and the gap between the shaft hole 12b1 of the drive shaft holder 12b and the outer surface of the first drive shaft 60 enable a rubbing motion (oscillating motion). . Therefore, the engagement between the coupling tongue piece 66 provided at the other end of each first drive shaft 60 and the engagement hole 32 a of the rotation transmission block 32 provided at each inner blade 30 is facilitated. Here, the hollow hub 52 and the shaft hole 12b1 constitute drive shaft support means for supporting the first drive shaft 60 so as to allow the first drive shaft 60 to swing.

Furthermore, a single second gear wheel 100
Is rotatably provided on a second spindle 12y fixed to the mounting plate 12a. Like the first gear wheel 50, the second gear wheel 100 is provided with a hollow bub 102 having a hollow portion inside at the center thereof, and a flange 112 of a second drive shaft 110 having a hollow hole therein. I have. The flange 112 provided at one end of the second drive shaft 110 is connected to the inside of the hollow hub 102 of the second gear wheel 100, and the second drive shaft 110 is coaxially connected to the second gear wheel 100 to It is adapted to be rotated by a gear wheel 100. In the hollow hole of the second drive shaft 110, a second coil spring 104 is provided as an example of a spring means, and is compressed between the second drive shaft 110 and the second gear wheel 100 so that the second drive shaft 110 is compressed. It is biased in the direction of the head frame 16. Second drive shaft 11
0 is a connecting tongue 1 which is engaged with the end gear 120 at the other end.
16 are formed.

The end gear 120 comprises a gear portion 120a and a rotation transmitting portion 120b, and the gear portion 120a is located between the head frame 16 and the blade mounting frame 12c. The end frame 120 includes the head frame 16
There is provided a pin 124 which engages with a concave portion 16b (see FIG. 5A) formed on the inner surface of the end gear 120 to enable the end gear 120 to rotate. The gear teeth 120c formed on the gear portion 120a of the end gear 120 mesh with the annular gear 22 provided on the outer cutter 20, and the rotation transmitting portion 120b is provided with an engagement hole 120d provided therein to rotate the second drive shaft. The end gear 120 is rotated by the second drive shaft 110 by being connected to the connection tongue 116 of the connection 110. In the above configuration, the presence of the second coil spring 104 causes the second drive shaft 1
10 is a rubbing motion (oscillating motion) due to a gap between the outer surface thereof and the inner surface 102b of the hollow hub 102 and a gap between the outer surface of the second drive shaft 110 and the inner surface of the second shaft hole 12b2 of the drive shaft holder 12b. The second drive shaft 1
The ten connecting tongues 116 are the rotation transmitting portions 1 of the end gear 120.
It can be easily engaged with the engagement hole 120d provided in 20b. Here, the hollow hub 102 and the second shaft hole 12b2 constitute drive shaft support means for supporting the second drive shaft 110 so as to allow the second drive shaft 110 to swing.

In the above embodiment, as shown in FIG. 5A, the annular gear 22 is provided on the outer peripheral surface of the outer cutter 20, and the gear teeth 120c formed on the outer periphery of the end gear 120. Is engaged. However, as shown in FIG. 5B, the outer cutter 20 has the annular gear 22 a on the lower end face, and the gear teeth 1 formed on the upper end face of the end gear 120.
20e. Further, a transmission spindle 12z is fixed on the mounting plate 12a, and a transmission gear 130 as transmission means is mounted on the transmission spindle 12z.
It is provided so as to be rotatable. The transmission gear 130 is connected to one of the two first gear wheels 50 and the second gear wheel 1.
00, the gear wheels 50 and 10
0, one of the two first gear wheels 50 rotates the transmission gear 130, and the rotation of the transmission gear 130 rotates the second gear wheel 100. The second gear wheel 100, the second drive shaft 110, and the end gear 120 provided near the inner blade drive assembly are referred to as an outer blade drive assembly (also referred to as a second drive means).

FIG. 6 is an explanatory view showing the gear arrangement in the above embodiment. In particular, the motor shaft gear 14a, the first gear wheel 50, the transmission gear 130, and the second gear wheel 10
0, the end gear 120, and the arrangement of the annular gear 22 provided on the outer cutter 20 are shown. As is clear from FIG.
Gear G1 (motor shaft gear 14a in FIGS. 2 and 3)
Correspond to two gears G2a and G2 provided in parallel.
b (first gear wheel 5 in FIGS. 2 and 3 respectively)
0), and the gear G3 (corresponding to the transmission gear 130) is connected to these two gears G2a and G2b (FIGS. 2 and 3).
Gear G2, which is one of the gear wheels 50) in FIG.
a and the gear G4 (that is, the second gear wheel 100). Gear G4 'provided coaxially with gear G4
(Corresponding to the end gear 120 in FIGS. 2 and 3)
Gears G5a and G5b (each corresponding to the annular gear 22 provided on the outer cutter 20 in FIGS. 2 and 3).

Therefore, the gear G1 (motor shaft gear 1)
When 4a) is rotated in the one direction P by the motor, the gears G2a and G2b (first gear wheel 50) meshing with the gear G1 rotate in the other (ie, opposite) N direction.
In other words, the inner blade rotated by the gears G2a and G2b is rotated in the N direction. On the other hand, when the gear G2a is thus rotated in the N direction, the gear G meshing with the gear G2a
3 (transmission gear 130) is rotated in the P direction,
Gear G4 (second gear wheel 10) meshing with gear G3
0) is rotated in the N direction, and the gear G4 ′ (end gear 120) provided coaxially on the gear G4 is rotated in the N direction, and when the gear G4 ′ is rotated in the N direction in this way. ,
Gears G5a and G5b meshing with gear G4 '(annular gear 2)
2) is rotated in the P direction. That is, the gears G5a, G5
The two outer blades provided with 5b (annular gear 22) rotate in the P direction. That is, the two inner blades rotate in one P direction, and the two outer blades rotate in the other or opposite P direction. That is, the inner cutter and the outer cutter are rotated in different or opposite directions.

FIG. 7 shows a modification of the above embodiment. In the embodiment of FIG. 7, the inner blade and the outer blade are rotated in the same direction. That is, as shown in FIG. 7, the auxiliary transmission gear G3a as another transmission means is composed of a gear G3 (corresponding to the transmission gear 130 as one transmission means) and a gear G4.
(Second gear wheel 100), and the gear G3
Is transmitted to the gear G4 via the auxiliary transmission gear G3a. Therefore, unlike the embodiment of FIGS. 2 and 3, when the gear G3 (the transmission gear 130) is rotated in the P direction, the gear G4 (the second gear wheel 100) is rotated in the N direction by the gear G3. Due to the presence of the transmission gear G3a, the gear G4a is rotated in the P direction, and the gear G4 '(end gear 120) provided coaxially with the gear G4 is also rotated in the P direction. Therefore, the gears G5a and G5b (annular gear 22) of the two outer blades 20 meshing with the gear G4 'rotating in the P direction are rotated in the N direction, and the two outer blades having the annular gear 22 (gears G5a and G5b). Is rotated in the N direction, which is the same direction as the rotation direction of the two inner blades.

As described above, the electric shaver of the present embodiment having two pairs of inner blades and outer blades has a shaver housing in which a single motor having a motor shaft gear on an output shaft is provided. A mounting plate provided in the shaver housing, and two first shafts meshed with the motor shaft gear rotatably arranged on the mounting plate and rotated in one direction by the motor shaft gear; A gear wheel, two first drive shafts coaxially coupled to the two first gear wheels and rotated in one direction by the gear wheel, and one direction coupled to the two first drive shafts. Two rotating inner blades, and a transmission gear rotatably provided on the mounting plate and meshing with one of the two first gear wheels, thereby being rotated in the other direction opposite to one direction. When The second gear wheel, which is rotatably provided on the mounting plate and meshes with the transmission gear, thereby being rotated in one direction, and coaxially coupled to the second gear wheel. A second drive shaft that is rotated, an end gear that is coupled to the second drive shaft and thereby rotates in one direction, and each of the two inner cutters is located therein, and the end gear And two outer blades provided with an annular gear that meshes and rotates in the other direction, so that the two outer blades and the two inner blades can be rotated in the same direction. By using the auxiliary transmission gear in the configuration, the two outer blades and the two inner blades can be rotated in the same direction.

FIG. 8 shows a gear arrangement employed in the second embodiment of the present invention. In this embodiment, three sets of outer blades and inner blades are arranged in a regular triangle (reverse regular triangle) shape, and three inner blades rotate in one direction and three outer blades rotate in the other direction opposite to one direction. Is done. The basic structure of the second embodiment is the same as the first embodiment described above,
Since the second embodiment is an extension of the basic structure shown in FIGS. 2 and 3 from a two-blade system to a three-blade system, the description will be made based only on the gear layout shown in FIG.

As shown in FIG. 8, a gear G1 (corresponding to the motor shaft gear 14a in FIGS. 2 and 3) has three gears G2a, G2b, G2c arranged in an inverted triangular shape.
(First gear wheel 5 in FIGS. 2 and 3 respectively.
0 (corresponding to 0), and mesh with them.
The gear G3 (corresponding to the transmission gear 130 in FIGS. 2 and 3) meshes with the gear G2a and meshes with the gear G4 (corresponds to the second gear wheel 100 in FIGS. 2 and 3). A gear G4 '(corresponding to the end gear 120 in FIGS. 2 and 3) is provided coaxially with the gear G4 and is rotated by the gear G4', and the gear G4 'is composed of the gears G2a and G2.
b, three gears G arranged in an inverted triangular shape like G2c
5a, G5b, and G5c (each corresponding to the annular gear 22 of the outer cutter 20 in FIGS. 2 and 3) mesh with two gears (G5a and G5b). In the second embodiment, a relay gear means (simply called a relay gear) G6 meshing with the gears G5b and G5c is further provided on the inner surface of the head frame 16. That is,
As shown by reference numeral 140 in FIG. 9, the relay gear G6 is rotatably provided on the lower surface of the head frame 16, and one of the two gears G5a and G5b (G5b) and the other gear (G5b). It is in mesh with the gear G5c (annular gear 22).

Therefore, the gear G1 (motor shaft gear)
Is rotated in the P direction by the motor, the gears G2a, G2b and G2c (first gear wheel 50) meshing with the gear G1 all rotate in the other (opposite) N direction. That is, 3
The two inner blades are rotated in the N direction. On the other hand, when the gear G2a rotates in the N direction, the gear G3 (the transmission gear 130) meshing with the gear G2a rotates in the P direction, and the gear G4 (the second gear wheel 100) meshing with the gear G3 changes to the N direction. Rotate in the direction. Since the gear G4 '(end gear 120) is coaxial with the gear G4, the gear G4' rotates in the N direction. When the gear G4 'rotates in the N direction, the gears G5a and G5b (annular gear 22) meshing with the gear G4' rotate in the opposite P direction. When the gear G5b rotates in the P direction in this way, the gear G6 (relay gear 140) meshing with the gear G5b rotates in the N direction, and as a result, the gear G6
The gear G5c (annular gear 22) that meshes with is rotated in the P direction. That is, the gears G5a, G5b and G5c are all rotated in the P direction. That is, the gears G5a, G5b and G5
All three outer blades having an annular gear corresponding to 5c are rotated in the P direction. According to the above configuration, in this embodiment, three inner blades are rotated in one N direction, and three outer blades are rotated in the other P direction. In other words, the inner cutter and the outer cutter are rotated in different or opposite directions.

In the embodiment shown in FIG. 10, in addition to the structure of the embodiment shown in FIG.
3 (transmission gear 130) and gear G4 (second gear wheel 1)
00), and mesh with these gears G3 and G4. Therefore, the gear G3 (the transmission gear 13)
0) is rotated in the P direction, the auxiliary transmission gear G3a becomes N
Gear G4 (second gear wheel) is rotated in the P direction, and the gears G5a and G5 provided on the outer cutter and meshing with the gear G4 'rotated by the gear G4.
b (annular gear 22) rotates in the N direction. Since the gear G5b is thus rotated in the N direction, the relay gear G6
Is rotated in the P direction, and rotates the gear 5C (annular gear 22) provided on the outer cutter in the N direction. Therefore, the three inner blades and the three outer blades are rotated in the same N direction.

That is, the electric shaver according to the above embodiment having three inner blades and three outer blades is a shaver housing having a single motor having a motor shaft gear provided on an output shaft therein, A mounting plate provided in the housing, and three first gear wheels rotatably provided on the mounting plate and meshing with the motor shaft gear and rotated in one direction by the motor;
Three first drive shafts each being coaxially coupled to each of the three first gear wheels, thereby rotating in one direction, and each being coupled to the three first drive shafts, whereby one Three inner blades rotatable in one direction and a transmission rotatably provided on the mounting plate and meshing with one of the three first gear wheels, thereby being rotated in the other direction opposite to one direction. A gear, a second gear wheel rotatably provided on the mounting plate and meshing with the transmission gear, thereby being rotated in one direction, and coaxially coupled to the second gear wheel, whereby A second drive shaft that is rotated in one direction, an end gear coupled to the second drive shaft and thereby rotated in one direction,
A relay gear provided on the frame and three outer blades each having three inner blades located therein, each of the three outer blades being provided with an annular gear; The annular gear provided on the two outer cutters is engaged with the end gear and rotated in the other direction, and the annular gear of the remaining one of the three outer cutters is the outer gear of the three outer cutters. Since the structure is such that the relay gear meshes with the annular gear provided on one of the two outer cutters and is rotated in the other direction, three outer cutters and three inner cutters are provided. Can be rotated in the same direction, and by using the auxiliary transmission gear in such a structure, three outer blades and three inner blades can be rotated in the same direction.

FIG. 11 shows a gear arrangement according to a third embodiment of the present invention, in which one inner blade and one outer blade rotate in the same direction. The basic structure of the third embodiment is the same as the first and second embodiments,
It has a simple structure compared to a two-blade system or a three-blade system. Therefore, the third embodiment is shown in FIG.
1 will be described based on only the gear layout shown in FIG. That is, when the motor starts, the gear G1, ie, the motor shaft gear 14
a rotates in the P direction. Gear G2 (corresponding to first gear wheel 50) is gear G1 (motor shaft gear 14).
The gear G2 is rotated in the other (opposite) N direction because the gear G2 is engaged with the gear a). Therefore, the inner blade connected to the first drive shaft coaxially connected to the gear G2 is rotated in the N direction by the gear G2. On the other hand, when the gear G2 (first gear wheel 50) is rotated in the N direction by the gear G1 (motor shaft gear 14a) as described above, the gear G3 meshing with the gear G2 (corresponding to the transmission gear 130) becomes P Rotated in the direction. Therefore, the gear G4 meshing with the gear G3
(The second gear wheel 100) is rotated in the N direction, and is connected to the gear G4 via the second drive shaft (110).
4 '(end gear 120) is also rotated in the N direction. As a result, the gear G5 meshing with the gear G4 ′ (end gear 120)
That is, the annular gear 22 of the outer cutter is rotated in the P direction, and the gear G5
That is, the outer blade provided with the annular gear 22 is rotated in the P direction. As described above, the inner blade is rotated in one direction N, and the outer blade is rotated in the other direction, that is, the opposite P direction. That is, the outer cutter and the inner cutter are rotated in different or opposite directions.

FIG. 12 shows a modification of the embodiment shown in FIG. 11. In this modification, the inner blade and the outer blade are rotated in the same direction. That is, as shown in FIG. 12, the auxiliary transmission gear G3 (130a) is
3 (transmission gear 130) and gear G4 (second gear wheel 1)
00), the rotation of the gear G3 is transmitted to the gear G4 via the auxiliary transmission gear G3a. Therefore, unlike the embodiment of FIG. 11, when the gear G3 (the transmission gear 130) is rotated in the P direction, the gear G4 (the second gear wheel 100) becomes the auxiliary transmission gear G3a (130).
For a), the gear G4 '(end gear 120) is rotated in the P direction, and the gear G4' (end gear 120) is also rotated in the same direction. Therefore, the gear G
The gear G5 of the outer blade meshing with 4 '(end gear 120), ie the annular gear 22, is rotated in the opposite N direction, and the inner blade is accordingly rotated in the N direction, which is the same direction as the rotation direction of the outer blade.

In any of the above embodiments, FIG.
The gear tooth shape, gear size or diameter, and number of teeth of each of the plurality of gears shown in FIG. 12 are merely examples, and the gear elements (for example, the shape of the gears and the gear teeth) of each gear used in the actual product , Gear size or diameter, gear ratio, number of gear teeth, meshing mode). Furthermore, the outer blade and the inner blade are rotated at different rotation speeds,
Preferably, the outer cutter is rotated more slowly than the inner cutter. For example, the inner blade is 2500 ± 500 (2000-3000) r
When rotated at pm, it is desirable that the outer blade be rotated at 50 rpm or less, preferably at 20 to 40 rpm. That is, a good shaving effect can be obtained by rotating the inner blade and the outer blade at a ratio of about 83: 1.

Further, in any of the above embodiments, the transmission gear 130 (gear G3) is
0 (gears G2, G2a, G2b, G2c), the second drive shaft 110, the end gear 120 (gear G
4 ′), an annular gear 22 (gears G5, G5a, G5b, G
5c) The second gear wheel 1 rotating the outer cutter 20 via
00 (gear G4). However, the transmission gear 130 (G3) may be directly rotated by the motor 14. In this case, the transmission gear 13
0 (G3) is not rotatably provided on the mounting plate 12z, but is attached to the output shaft 14 'of the motor 14 to mesh with the first gear wheel 50 and the second gear wheel 100, The drive shafts 60 and 110 are rotated. Further, a gear corresponding to the motor shaft gear 14a (G1) is rotatably provided on the mounting plate 12a so as to mesh with the first gear wheel 50. With this configuration, the same operation and effect as those of the above embodiment can be obtained. Further, in any of the above embodiments, the outer cutter 20 is configured to continuously rotate in a fixed direction. However, outer blade 2
The rotation direction of 0 may be switched at a predetermined cycle.

[0034]

As described above, according to the present invention, not only the inner blade but also the outer blade are rotated by the combination of the gears functioning with a single power source. Can be rotated in one direction or the other.
Therefore, the falling hair can be raised by the rotating outer blade and introduced into the slit (hair inlet) of the outer blade, and shaving can be performed extremely easily, effectively, and smoothly. And since the inner blade and the outer blade are rotationally driven by only a single power source, the outer shape of the electric shaver can be made compact and the components of the electric shaver can be made smaller than in the case where a power source is provided for each blade. Above all, the unit price is particularly high, and since there is only one power source as a noise generation source, noise can be reduced, power consumption can be reduced, and product cost can be reduced.

[Brief description of the drawings]

FIG. 1 is an explanatory sectional view showing the inside of an electric shaver according to a first embodiment of the present invention having two pairs of an inner blade and an outer blade.

FIG. 2 is an exploded perspective view showing a main part of FIG. 1;

FIG. 3 is an explanatory cross-sectional view of a main part from the direction of arrow 3-3 in FIG.

FIG. 4 is a perspective view of an outer blade.

5A is a cross-sectional explanatory view showing a meshing state between a gear of an outer blade and a gear rotating the outer blade, and FIG. 5B is another meshing connection between the outer blade, a gear and a gear rotating the outer blade. Sectional explanatory drawing which shows a state.

FIG. 6 is a plan view showing a gear arrangement in the first embodiment.

FIG. 7 is a plan view showing a gear arrangement different from that of the first embodiment shown in FIG. 6;

FIG. 8 is an explanatory view showing a gear arrangement of an electric shaver according to a second embodiment of the present invention having three pairs of inner blades and outer blades.

FIG. 9 shows an annular gear provided on one of three outer blades used in the second embodiment and a relay for rotating the outer blade.
Sectional drawing which shows the meshing state of a gear.

FIG. 10 is a plan view showing a gear arrangement different from that of the second embodiment shown in FIG. 8;

FIG. 11 is a plan view showing a gear arrangement of an electric shaver according to a third embodiment of the present invention having a pair of inner blades and outer blades.

FIG. 12 is a plan view showing a gear arrangement of another embodiment different from the third embodiment shown in FIG. 11;

[Explanation of symbols]

 Reference Signs List 10 electric razor 14 motor (power source) 20 outer blade 30 inner blade

Claims (20)

[Claims] 1. An electric razor comprising at least one outer blade, at least one inner blade, and a single power source for rotating the outer blade and the inner blade together. 2. The electric shaver according to claim 1, wherein the at least one outer blade and the at least one inner blade rotate in the same direction. 3. The electric shaver according to claim 1, wherein said at least one outer blade and said at least one inner blade rotate in different directions. 4. The electric shaver according to claim 1, wherein the at least one outer blade rotates at a lower rotation speed than the at least one inner blade. 5. The at least one outer blade has a rotation speed of 50 rpm.
The electric shaver according to claim 4, wherein the electric shaver rotates below. 6. The electric shaver according to claim 4, wherein said at least one inner blade and said at least one outer blade rotate at a rotation ratio of about 83: 1. 7. The electric shaver according to claim 1, wherein said at least one outer cutter is provided with gear means on an outer peripheral surface. 8. The at least one inner blade is positioned inside the at least one outer blade by a blade body mounting frame mounted on a head frame removably provided on a shaver housing; The two inner blades are rotated by first driving means driven by the single power source, and the at least one outer blade is rotated by second driving means driven by the single power source. The electric shaver according to claim 7, wherein 9. An electric shaver according to claim 8, further comprising a transmission means provided between said first driving means and said second driving means and engaging therewith. 10. The second drive means is provided on a gear wheel meshing with the transmission means, a drive shaft coaxially connected to the gear wheel, and on the at least one outer cutter connected to the drive shaft. 10. An electric shaver according to claim 9, comprising an end gear meshing with said gear means. 11. An electric shaver according to claim 10, further comprising spring means provided between said gear wheel and said drive shaft. 12. A drive shaft supporting means provided in the shaver housing and supporting the drive shaft so as to allow a swinging movement of the drive shaft of the second drive means, is further provided. The electric shaver according to claim 11, wherein 13. The electric shaver according to claim 4, wherein the at least one outer blade is rotatably provided and is rotated by driving means driven by the single power source. 14. A shallow cylindrical main body having a circular top end surface provided with a plurality of radially-opened hair introduction ports, and said cylindrical main body is provided with an annular gear fixed to an outer peripheral surface thereof. An outer blade used for a rotary electric razor. 15. A shaver housing having a single power source therein, at least one outer blade provided with gear means, and at least one inner blade rotated within said at least one outer blade. A head frame attached to one end of the shaver housing; and at least one first provided in the shaver housing and rotated by the single power source to rotate the at least one inner blade. An electric shaver comprising: driving means; and second driving means provided in the shaver housing and rotated by the single power source to rotate the at least one outer blade. 16. The electric shaver according to claim 15, wherein the at least one inner blade is rotated in one direction, and the at least one outer blade is rotated in the other direction. 17. The electric shaver according to claim 15, wherein the at least one inner blade is rotated in one direction, and the at least one outer blade is rotated in the one direction. 18. A shaver housing having a single power source therein, at least one outer blade provided with gear means, and at least one inner blade rotated within said at least one outer blade. A head frame mounted on one end of the shaver housing; and at least one head mounted in the shaver housing and rotated by the single power source to rotate the at least one inner blade in one direction. Three first driving means, at least one transmission means rotated by the at least one first driving means, and provided in the shaver housing, rotated by the at least one transmission means and rotated by the at least one transmission means. A second motor for rotating the blade in the other direction via the gear means provided on the at least one outer blade And means,
An electric razor, comprising: 19. A shaver housing having a single power source therein, at least one outer blade provided with gear means, and at least one inner blade rotated within said at least one outer blade. A head frame mounted on one end of the shaver housing; and at least one head mounted in the shaver housing and rotated by the single power source to rotate the at least one inner blade in one direction. Two first transmission means, one of which is rotated by the at least one first drive means and two of which are mutually engaged; and which are provided in the shaver housing and which are rotated by the other of the two transmission means. The at least one outer blade is rotated in the one direction via the gear means provided on the at least one outer blade. Second drive means and an electric shaver, characterized in that it consists of that. 20. A relay gear means meshing with a gear means provided on said at least one outer cutter is provided.
2. The apparatus according to claim 1, further comprising a frame.
An electric razor according to 5, 18 or 19.