JP2576763Y2 - Electric razor - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric shaver which can be washed.

[0002]

2. Description of the Related Art Recently, there are rotary electric razors and reciprocating electric razors in which a portion provided with an outer blade and an inner blade can be washed with water in order to remove shavings and the like.

For example, in a rotary electric shaver, when washing with water, a portion provided with an outer blade and an inner blade is immersed in water, and the inner blade is rotated to wash away shavings while rotating the water.

[0004]

[Problems to be Solved by the Invention] In a rotary electric shaver, when the inner blade is rotated in a state where the portion provided with the outer blade and the inner blade is immersed in water for cleaning, the inner blade is moved by the side surface. It will rotate while pushing water away.

[0005] At this time, the load applied to the side surface of the inner blade is larger than the load applied to the side surface of the inner blade when the electric shaver is used for shaving, that is, when the inner blade rotates in air. In other words, there is a large difference between the load applied to the inner blade at the time of cleaning and the load applied to the inner blade at the time of shaving.

The load applied to the side surface of the inner cutter is finally transmitted to an output shaft of a motor which applies a driving force to the inner cutter and is applied to the motor. For this reason, if a load due to water is applied to the side surface of the inner blade during cleaning, a larger load is applied to the motor than when shaving is performed.

As a result, the motor needs to rotate the inner blade against a large load as compared with the time of shaving, so that the motor consumes a large amount of power as compared with the time of shaving. For this reason, when the power source of the electric shaver is a battery or a storage battery, there is a problem that the usable time of the battery, that is, the service life is shortened and the economy is low.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an electric shaver that reduces the load applied to a motor at the time of cleaning to reduce the power consumption of a motor, thereby improving economic efficiency. I do.

[0009]

Means for Solving the Problems] electric shaver of the present invention in order to achieve the object, the main body case, the main body Quai
The outer blade provided on the base and the inner surface of this outer blade
And a spring force for directing the inner blade toward the outer blade
With an inner blade base that holds the inner blade
Free and close to the outer blade along the axial direction
The inner blade drive shaft movably provided in the direction
And a driving gear rotated by this motor,
The inner cutter drive shaft is provided on the inner cutter drive shaft, and the inner cutter drive shaft contacts the outer cutter.
When it moves in the approaching direction, it
1 driven gear and an inner cutter drive provided on the inner cutter drive shaft.
When the driving shaft moves in a direction away from the outer cutter, the drive
In addition to meshing with the driving side gear,
Reduction ratio by the first driven side gear and the drive side gear
Which is larger than the reduction ratio due to the meshing of
2 by moving the driven gear and the inner blade drive shaft.
Driving the first driven gear and the second driven gear
Operating mechanism for selectively meshing with the side gear
It is characterized by.

[0010]

When the electric shaver is used for normal shaving, the speed change mechanism is switched to a speed reduction step smaller than the speed reduction ratio at the time of washing by the operating mechanism, and the rotation of the motor is input to the inner blade through the speed change mechanism. To the side.

When cleaning the electric shaver, the operation mechanism switches the transmission mechanism to a stage having a reduction ratio larger than the reduction ratio during shaving, and transmits the rotation of the motor to the input side of the inner blade via the transmission mechanism.

In this manner, the load applied to the motor when the inner blade receives the load of water when cleaning the electric razor can be reduced to a value close to the load applied to the motor when the electric razor is used for shaving. Therefore,
The power consumption of the motor at the time of cleaning the electric shaver can be reduced, and when the power source of the motor is a battery, the life of the battery can be extended. In addition, the
The inner blade is given a force by a spring and contacts the inner surface of the outer blade.
The second driven tooth when cleaning the shaver
Drive the inner blade drive shaft from the outer blade to mesh the car with the drive side gear.
Inner blade mounted on inner blade drive shaft by moving away
When the platform moves in the same direction, the inner blade protruding from the
The area increases compared to when shaving, and the inner blade and water
The contact area increases, the water flow generation effect increases, and the cleaning effect increases.
improves. Also, the inner blade drive when cleaning the electric razor
Move the shaft away from the outer blade so that the inner blade base is in the same direction
The inner cutter pressed by the spring contacts the inner surface of the outer cutter.
As the contact force is reduced, the inner blade is
Wear of each blade due to friction with the inner surface of the blade can be suppressed.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to the drawings.

This embodiment is directed to a rotary electric shaver that can be cleaned.

FIG. 1 shows the entire structure of a rotary electric shaver according to this embodiment.

In FIG. 1, reference numeral 1 denotes a main body case.
Is a head 1a having both ends closed, and the head 1
The handle portion 1b, which is a cylindrical body extending in a direction perpendicular to the direction a, is integrally formed.

A rising edge 2 is formed at the front end of the head portion 1a of the main body case 1, and an annular outer blade base 3 to which an annular outer blade 4 is attached is screwed to the rising edge 2. . A beard storage space a is formed by a space surrounded by the front end of the head portion 1a, the rising edge 2, the outer blade base 3, and the outer blade 4.

An inner cutter base 5 is arranged inside the outer cutter 4, and an inner cutter 6 faces a hole 5 a formed in the inner cutter stand 5 toward the outer cutter 4.
Movably arranged so as to protrude . The inner cutter 6 is held by a spring 7, and a force is applied to the outer cutter 4 by the spring 7 to contact the inner surface of the outer cutter 4.

The inner blade drive shaft 10 is axially movable and rotatable on thrust bearings 9A and 9B held by bearing holding portions 8a and 8b formed at both ends of the head portion 1a of the main body case 1. It is supported.

A motor 12 is arranged and held in a motor holding portion 11 formed on the grip portion 1b of the main body case 1 along a direction perpendicular to the inner blade drive shaft 10. Motor 12
Is an output shaft 13 protruding from an end facing the inner blade drive shaft 10.
The output shaft 13 is provided with a gear 14. In this gear body 14, a bevel gear 15 and a spur gear 16 are formed on the same axis.

The gear body 1 of the output shaft 13 is attached to the inner cutter drive shaft 10.
A bevel gear 17 capable of meshing with the bevel gear 15 is attached and fixed at a position farther from the outer cutter 4 with respect to the outer cutter 4, and a position closer to the outer cutter 4 with the gear body 14 of the output shaft 13 interposed therebetween. , A spur gear 18 that can mesh with the spur gear 16 is attached and fixed. That is, the inner blade drive shaft 10 is freely rotatable.
In the direction of approaching and separating from the outer cutter 4 along the axial direction.
The gears 15 and 16 of the gear body 14 are movably provided.
Is a drive side gear, and bevel gear 17 is a first driven side gear.
The spur gear 18 is a second driven gear.

Here, for example, the number of teeth of the bevel gear 15 of the gear body 14 and the number of teeth of the spur gear 16 are set to be the same, and the number of teeth of the bevel gear 17 and the number of teeth of the bevel gear 15 are set to be the same. Have been. Further, the number of teeth of the spur gear 18 is set to be larger than the number of teeth of the spur gear 16, for example, twice. Thus, the reduction ratio between the spur gear 16 and the spur gear 18 is set to be larger than the reduction ratio between the bevel gear 15 and the bevel gear 17, for example, twice.

The inner blade drive shaft 10 has a bearing 9A and a spur gear 18
Between the outer cutter 4 and the inner cutter drive shaft 10.
Force is applied in the direction away from.

Here, the combination of the inner blade drive shaft 10, the gear body 14, the bevel gear 17, the spur gear 18, and the compression coil spring 19 controls the rotational driving force of the motor 12 to any one of a plurality of stages. And a transmission mechanism for transmitting to the inner cutter base 5 which is the input side of the inner cutter 6.

Reference numeral 20 denotes an operating body, which includes a shaft 20a and a knob 2
0b, and a ridge 21 is formed around the shaft portion 20a. The rear end of the head 1a of the main body case 1 has a circular hole 2 located on the same axis as the inner blade drive shaft 10.
The hole 22 has a shaft portion 20b of the operating body 20 formed therein.
Is rotatably inserted.

The knob portion 20b is located outside the hole 22 so that the user can hold and rotate the shaft portion 20a.

As shown in FIG.
Of the shaft portion 20b inserted into the hole 22 is formed.
Are engaged. Thus, when the shaft portion 20a is rotated with the knob portion 20b, the operating body 20 moves on the same axis as the inner blade drive shaft 10 in a direction approaching the outer blade 4 or in a direction separating from the outer blade 4 according to the rotation direction.

The end of the inner blade drive shaft 10 to which a force is applied by the compression coil spring 19 in the direction away from the outer blade 4 is always in contact with the tip of the shaft portion 20a.

Therefore, when the operating body 20 moves in a direction approaching the outer blade 4 or in a direction separating from the outer blade 4, the inner blade driving shaft 1
0 can follow and move in a direction approaching the outer cutter 4 or in a direction away from it.

A circuit board 24 on which a circuit such as a motor driving circuit is formed is disposed inside the grip portion 1b of the main body case 1. The circuit board 24 is a power source for the motor 12. A storage battery 25 and a push button switch 26 are attached. The circuit formed on the circuit board 24 is connected via a lead wire 27 to a terminal 28 protruding from the end of the grip 1b.

The terminal 27 connects to a charging adapter (not shown) for charging the storage battery 25. The operation part 26a of the switch 26 is attached to the grip part 1b.

An opening / closing ring 30 is rotatably fitted to the rising edge 2 of the main body case portion 1a of the main body case 1. Opening / closing ring 3 at rising edge 2
An opening 29 communicating with the whisker storage space a is formed in a portion where 0 is fitted, and an opening 31 is formed in the opening / closing ring 30 as shown in FIG.

The opening / closing ring 30 covers the opening 29 by the rotation of the opening / closing ring 30, or the opening 31 overlaps the opening 29 to open the opening 29.

In the figure, reference numeral 32 denotes a cap for cleaning bubbles,
And the outer blade base 3 from outside. Cap 3
Reference numeral 2 denotes a ridge formed on the opening / closing ring 30 when the cap 32 is fitted to the opening / closing ring 30 provided on the rising edge 2 of the main body case 1. 30a is detachably engaged with 30a.

The cap 32 has a detergent inlet 33 at the center. An opening / closing ring 35 is rotatably provided on the outer periphery of the opening of the cap 32, an opening 34 is formed in a portion of the cap 32 where the opening / closing ring 35 is provided, and an opening 36 is formed in the opening / closing ring 30. Have been. The opening and closing ring 35 covers the opening 34 by rotation of the opening and closing ring 35, or the opening 36 overlaps the opening 34 and opens it.

The operation of the electric shaver configured as described above will be described.

When performing normal shaving, the operating body 20 is rotated as shown in FIG. 2 to move the shaft portion 20a in a direction approaching the outer blade 4. As a result, the inner blade drive shaft 10 moves in a direction approaching the outer blade 4, and the bevel gear 17 attached to the inner blade drive shaft 10 becomes a bevel gear of the gear body 14 attached to the output shaft 13 of the motor 12. The gear meshes with the gear 15.

That is, of the combination of the spur gear 16 and the spur gear 18 of the gear body 14 and the combination of the bevel gear 15 and the bevel gear 17 of the gear body 14, 17 is selected.

The opening 29 of the rising edge 2 is covered with the opening / closing ring 30.

The user holds the knob 1b by hand with the head 1a of the main body case 1 facing upward, operates the operating element 26a to close the switch 26, and drives the motor 12 to rotate.

When the output shaft 13 is rotated by driving the motor 12, the gear body 14 attached to the output shaft 13 is rotated, and then the bevel gear 1 meshing with the bevel gear 15 of the gear body 14.
7 rotates and the inner blade drive shaft 10 to which the bevel gear 17 is attached
Rotates.

As described above, the rotation of the motor 12 is transmitted by a combination of gears having a relatively small reduction ratio, and the inner cutter base 5 rotates together with the inner cutter drive shaft 10 and is held by the inner cutter base 5 to form a spring. The inner blade 6 pressed by 7 rotates while sliding on the inner surface of the outer blade 4.

Then, the outer blade 4 is brought into contact with the skin of the human face to shave the existing skin. The beard residue is stored in the beard storage space a of the head portion 1a of the main body case 1.

Next, a description will be given of a case in which cleaning, for example, foam cleaning is performed to remove beard residues accumulated in the beard storing space a.

In order to carry out foam cleaning, the opening 31 of the opening / closing ring 30 is aligned with the opening 29 of the rising edge 2 as shown in FIG. Further, the cap 32 is put on the outer blade 4 so that the main body case 1
Is fitted and fixed to the rising edge 2. At this time, cap 3
The opening 36 of the opening / closing ring 35 is aligned with the opening 34 of the cap 32.

Then, the operating body 20 is rotated to rotate the shaft portion 20.
a is moved in a direction away from the outer cutter 4. As a result, the inner cutter drive shaft 10 moves in a direction away from the outer cutter 4, and the spur gear 18 attached to the inner cutter drive shaft 10
4 with the spur gear 16.

That is, of the combination of the spur gear 16 and the spur gear 18 of the gear body 14 and the combination of the bevel gear 15 and the bevel gear 17 of the gear body 14, the reduction ratio is relatively large, for example, 1 / 2, the combination of the spur gear 16 and the spur gear 18 is selected.

As shown in FIG. 3, the user holds the knob 1b by hand with the head 1a of the main body case 1 facing downward, and immerses the lower half of the head 1a in water 40. The lower half of the space a is submerged in the water 40.

Then, the switch 26 is closed by operating the operating element 26a, the motor 12 is driven to rotate, the output shaft 13 rotates the gear body 14, and the spur gear 1 of the gear body 14 is rotated.
The inner blade drive shaft 10 is rotated by rotating the spur gear 18 meshing with the inner ring 6.

As described above, the rotation of the motor 12 is transmitted by the combination of the gears having a relatively large reduction ratio, and the inner cutter base 5 is rotated by the inner cutter drive shaft 10 to the inner cutter base 5. The attached inner blade 6 is rotated.

The rotation of the inner blade 6 agitates the water 40 inside the beard storing space a, and the beard storing space a and the cap are opened via the opening 29 of the rising edge 2 and the opening 31 of the opening / closing ring 30. 32 and a space b surrounded by the outer cutter 4 and the outer cutter base 3 alternately flows.

Then, a detergent is applied to the cap 3 for foam cleaning.
2 into the detergent inlet 33, the detergent is
Into the space b surrounded by the outer cutter 4 and the outer cutter base 3.
Then, the detergent is put in the beard storage space a and the cap 3
It is stirred by the water 40 flowing between the space 2 and the space b surrounded by the outer blade 4 and the outer blade base 3, and is dissolved in the water 40 to generate bubbles.

The bubbles flow along the flow of the water 40 and flow between the beard storage space a and the space b surrounded by the cap 32 and the outer cutter 4 and the outer cutter base 3.
The shavings and the like adhered to the inner blade 6, the inner blade base 5, and the end surface of the head portion 1a in the main body case 1 are washed away. In addition, wash away beards etc. with cap 3
2 through the opening 34 and the opening 36 in the opening / closing ring 35.

Here, when the inner cutter base 5 is rotated in the water 40 to rotate the inner cutter 6, the inner cutter 6 rotates while pushing away the water 40 on the side surface. At this time, the load applied to the side surface of the inner cutter 6 is larger than the load applied to the side surface of the inner cutter 6 when shaving is performed. In particular, the presence of bubbles in the water 40 increases the resistance of the water to the inner blade 6.

Here, if the rotation of the output shaft 13 of the motor 12 is transmitted to the drive shaft 10 through a combination of the bevel gear 15 and the bevel gear 17 of the gear body 14, cleaning is performed. The increase in the load at 6 directly leads to an increase in the load applied to the output shaft 13 of the motor 12. For this reason, the load increases, the power consumption of the motor 12 greatly increases, and the battery usable time of the storage battery 25 for supplying power to the motor 12, that is, the life is shortened.

Accordingly, in the present invention, as described above, the spur gears 16 and 18 of the gear body 14 having a relatively large reduction ratio are used.
Select a combination of, transmit with a combination of relative to the speed ratio is large gear the rotation of the motor 12, the inner cutter drive shaft 1
The inner blade base 5 is rotated by 0, and the inner blade 6 attached to the inner blade 5 is rotated.

Then, the rotation of the inner blade 6 causes the motor 1 to rotate.
2 is applied to the bevel gear 1 of the gear body 14.
The number is greatly reduced as compared with the case where the combination of No. 5 and bevel gear 17 is selected.

The load applied to the output shaft 13 of the motor 12 by the rotation of the inner cutter 6 is driven by the combination of the bevel gear 15 and the bevel gear 17 of the gear body 14 to rotate the output shaft 13 of the motor 12. When shaving by transmitting to shaft 10,
The magnitude of the load applied to the output shaft 13 of the motor 12 can be greatly approximated. That is, the increase in the load applied to the inner blade 6 during the cleaning is transmitted to the output shaft 13 without being connected to the increase in the output shaft 13 of the motor 12.

Therefore, it is possible to avoid a large increase in the power consumption of the motor 12 due to an increase in the load applied to the inner blade 6 at the time of cleaning, and it is possible to avoid a reduction in the usable time of the storage battery 25.

When the inner blade drive shaft 10 moves away from the outer blade 4 to engage the spur gear 18 with the spur gear 16 of the gear body 14 during cleaning, the inner blade drive shaft 10
At the same time, the inner cutter base 5 moves in a direction away from the outer cutter 4.

However, the outer cutter 4 is attached to the inner cutter 6 by a spring 7.
Inner blade 6 is out though force is applied in a direction approaching toward the
Since the inner blade 5 is in contact with the inner surface of the blade 4, the area where the inner blade 6 projects from the hole 5a of the inner blade 5 as the inner blade 5 moves in the direction away from the outer blade 4 is shown in FIGS. compared to when performing shed <br/> Gesori as shown in increases y from x. For this reason, the area of the inner blade 4 in contact with the water 40 increases, and the effect of generating a water flow by the rotation of the inner blade 4 increases, thereby improving the cleaning effect.
Also, the inner blade drive shaft 10 is moved in a direction away from the outer blade 4.
When the inner cutter base 5 moves in the same direction, the inner cutter 6 of the spring 7
Pushing force decreases. This causes the inner blade to be pushed by the spring
The force with which the inner blade 6 comes into contact with the inner surface of the outer blade 4 decreases, and the inner blade 6 becomes the outer blade.
The sliding resistance when rotating while contacting the four surfaces decreases,
Wear of each blade due to friction between the inner blade 6 and the inner surface of the outer blade 4 is reduced.
You. Therefore, the inner blade 6 associated with cleaning the electric razor
And the wear of the outer cutter 4 can be suppressed.

Next, using a general electric shaver motor, there will be no deceleration during shaving, no deceleration during washing, and 1/2 deceleration during foam washing, referring to the diagram shown in FIG. The effects of the above embodiment will be described.

The diagram shown in FIG. 5 is a torque curve of the motor according to the embodiment of the present invention, and shows the relationship between the torque T, the rotation speed N, the current consumption I, and the efficiency Eff. In this diagram, T 0, T 1, T 2, and Tmax are the torque and the maximum torque at the time of shaving, no deceleration during bubble cleaning, and 減速 deceleration during bubble cleaning, respectively.

The load condition of each specification will be described.

When there is no deceleration during shaving (steady load): the torque (T0) is 5 g-cm, and the rotation speed (N0) is 5
200 rpm, motor current consumption (I0) 0.3 amps, efficiency E0 60%.

In the case of no deceleration during foam washing: torque (T1)
Is 70 g-cm, the number of revolutions (N1) is 2500 rpm, the current consumption (I1) of the motor is 1.9 amps, and the efficiency is E13.
7%.

In the case of 1/2 deceleration during foam washing: torque (T2
) Is 35 g-cm and the number of revolutions (N2) is 2100 rpm
m, the motor current consumption (I2) is 0.95 amperes and the efficiency E2 is 60%.

In the case of this motor, the load T1 is
Reaches more than 50% of the maximum torque Tmax, which is more than 10 times the steady load T0 during shaving, and the efficiency is reduced to 37% (E1).

Therefore, the output of the motor at the time of the bubble battlefield is reduced by half.
When the vehicle is decelerated, the efficiency becomes 60% (E2), which is the same level as at the time of shaving, and the rotation speed also becomes 2100 rpm (N2).
The level is almost the same for a rotation speed of 2500 rpm (N1) without deceleration.

Needless to say, the current consumption is 1.9 A
(I1) is greatly reduced to 0.95A (I2).

Therefore, it can be seen that the present application has a very excellent effect on the comparative example. In addition, this diagram also shows a case where there is no deceleration during water washing without using a detergent. In the case where there is no deceleration at the time of foam washing, the efficiency is lower than the case where there is no deceleration in the case of water washing, but the efficiency can be improved by applying the present invention.

The present invention is not limited to the above-described embodiment, but can be variously modified and implemented. For example, the transmission mechanism is not limited to the above-described combination of the rotating shaft and the gears, but has another structure. can do.

The operation mechanism is not limited to the above-described embodiment, but can be constituted by another structure.

In the above-described embodiment, the bubble cleaning is described as an example for performing the cleaning. However, the cleaning is not limited to this, and the cleaning may be performed using only water without using a detergent. Does not cover the outer blade with a foam cleaning cap.
Other operations are the same as those in the case of foam cleaning.

The present invention is limited to the above-described embodiment.
Instead, various modifications can be made.

[0076]

As described above, according to the electric razor of the present invention, when the electric razor is used for shaving, the load applied to the motor by the inner blade receiving the water load when the electric razor is washed. -A value close to the load applied to the motor. Therefore, the power consumption of the motor at the time of cleaning the electric shaver can be reduced, and when the power source of the motor is a battery, the life of the battery can be extended. Furthermore, the inner blade provided on the inner blade base is
Because the force is applied and it is in contact with the inner surface of the outer blade,
When cleaning the razor, change the second driven gear to the drive gear.
Move the inner blade drive shaft away from the outer blade to engage
To move the inner cutter base attached to the inner cutter drive shaft in the same direction.
When moving, the area of the inner blade protruding from the inner blade
And the area of contact between the inner blade and water increases
As a result, the water flow generation effect increases and the cleaning effect improves. Also,
Move the inner blade drive shaft away from the outer blade to move the inner blade
When it moves in the same direction, the inner blade pushed by the spring
As the force of contact with the inner surface decreases, the
Wear of each blade due to friction between the inner blade and the inner surface of the outer blade is reduced.
Therefore, the inner and outer blades involved in cleaning the electric razor
Can be suppressed.

[Brief description of the drawings]

FIG. 1 is an exploded sectional view showing a rotary electric shaver according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view showing the electric shaver set to shift during shaving in the embodiment.

FIG. 3 is a cross-sectional view showing an electric shaver set to a shift at the time of cleaning in the embodiment.

FIG. 4 is an enlarged view showing an operation mechanism of the electric shaver according to the embodiment.

FIG. 5 is a diagram showing torque characteristics of a motor in an electric shaver.

[Explanation of symbols]

1 ... body case, 3 ... outer blade base, 4 ... outer blade,
5 ... Inner blade stand, 6 ... Inner blade,
8a, 8b ... bearing holding portion, 9a, 9b ... bearing,
10: inner blade drive shaft, 12: motor,
13 ... output shaft, 14 ... gear body, 15
... bevel gear, 16 ... spur gear, 17 ... bevel gear, 18 ... spur gear, 19 ... spring, 20 ...
Operating body 21 ... ridge 22 ... hole, 23 ... groove, 24 ... circuit board, 25 ... battery, 26 ... switch,
29 ... opening, 30 ... opening and closing ring, 3
DESCRIPTION OF SYMBOLS 1 ... Opening part 32 ... Cap, 33 ... Detergent inlet, 34
... opening / closing ring, 40 ... water.

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) B26B 19/28 B26B 19/14

Claims (1)

(57) [Scope of request for utility model registration] 1. A body case, and a body provided on the body case.
Outer blade and the inner blade that shave and shave by contacting the inner surface of this outer blade
And holding the inner blade by applying a spring force toward the outer blade.
An inner blade base that can be rotated and
Moves in the direction of approaching and separating from the outer blade along the line direction
A freely provided inner blade drive shaft, a motor, and the motor
The drive-side gear rotated by the inner blade drive shaft
The inner blade drive shaft is moved in a direction to approach the outer blade.
A first driven gear that meshes with the drive gear when moved
And the inner cutter drive shaft provided on the inner cutter drive shaft is the outer cutter drive shaft.
Meshes with the drive side gear when moved in the direction away from
And the reduction ratio due to meshing with the driving gear
The reduction due to the engagement between the first driven gear and the driving gear.
The second driven gear that is larger than the speed ratio
Moving the inner blade drive shaft to form the first driven gear
And the second driven gear is selectively used as the driving gear.
An operating mechanism for meshing with the electric shaver.