JPH0223196B2 - - Google Patents

Description

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

[Conventional technology]

As a conventional technique for this type of electric shaver with razor blades, a switch knob for driving the inner blade and an operation knob dedicated to moving the razor blade in and out are separately provided on the outer surface of the main body case. 60−161077
It is known in the publication no. There, a sliding switch knob can be switched between three operating positions, upper and lower, and when the switch knob is in the lower position, the driving of the inner blade is stopped, and when the switch knob is slid to the middle position, the inner blade is driven. When the switch knob is further slid to the upper position, the outer razor blade projects out of the case while the inner cutter remains driven, and in this protruding position, the outer razor blade is interlocked and driven by the inner cutter drive mechanism. According to this, it is possible to switch between the normal shaving state and the close shaving state by a series of stepwise sliding operations of one switch knob. However, since the edge razor blade is always driven when it is in the protruding position, there remains the inconvenience that it is not possible to clean the edge razor blade in a non-driven state. Therefore, a separately provided dedicated operation knob is used to move the edge razor blade in and out, thereby allowing the edge razor blade to be protruded in a non-driven state for cleaning.

[Problem that the invention seeks to solve]

However, in the conventional example mentioned above, the operating knob for advancing and retracting the razor blade is a push type, so it is difficult to press the operating knob with the hand holding the main body case while shaving, causing the razor blade to protrude accidentally. Easy to invite. Such erroneous operations not only cause discomfort but also damage the skin. Even at the beginning of use, the razor blade tends to protrude unnecessarily.

On the other hand, a configuration in which a slide-type switch knob dedicated to turning on and off the drive of the inner blade and a slide-type operation knob dedicated to moving the outer razor blade in and out have been separately provided has been proposed. However, in this case, both the sliding switch knob and operation knob generally slide in the vertical direction, and the sliding operation direction of the switch knob that turns on the drive power of the inner blade and the direction in which the razor blade protrudes from the retracted position are different. The direction of the sliding operation for switching to the posture was set in the same direction, generally upward. Therefore, at the beginning of use, it is easy to mix up the switch knob and the operating knob and slide them, and when you intend to drive only the inner blade, you end up accidentally protruding the razor blade, making it difficult to perform the actual shaving job. Also, when shaving, it is actually very inconvenient to have to slide the switch knob and operation knob separately in the same direction with the thumb of the hand that grips the main body case, and has to regrip the main body case each time. , the operability is also poor. That is, for example,
When sliding the switch knob upward with the thumb, the thumb becomes fully extended, making it unsuitable for subsequent sliding operation of the operating knob upward.

[Purpose of the invention]

The present invention was proposed in order to eliminate such conventional problems.

SUMMARY OF THE INVENTION An object of the present invention is to enable an electric shaver with a cutting edge razor to turn on/off the driving power source for the inner blade and to move the cutting edge in and out without causing any erroneous operations.

An object of the present invention is to provide an apparatus with excellent operability that allows the above-mentioned operation to be performed extremely smoothly with the thumb of the hand holding the main body case or with both hands.

[Means for solving problems]

As shown in FIG. 1, the present invention includes a switch knob 17 for turning on and off the drive power of the edge razor blade 4 and the inner blade 2, and a dedicated operation knob 40 for moving the edge razor blade 4 in and out. Both the switch knob 17 and the operation knob 40 are of a sliding type. Thus, the sliding operation direction P of the switch knob 17 for switching the drive power of the inner cutter 2 from off to on
The present invention is characterized in that the sliding operation direction P' of the operation knob 40 for switching the razor blade 4 from the retracted position to the extended position is set in the opposite direction.

[Effect]

In this case, to explain the illustrated example in which the switch knob 17 and the operation knob 40 slide in the vertical direction, during normal shaving, only the switch knob 17 is slid to the upper switch-on position to drive the inner cutter 2. When the operating knob 40 is in the upper position, the razor blade 4 is in the retracted position. When the operating knob 40 is slid downward from the upper position, the razor blade 4 protrudes. At that time, if the switch knob 17 is in the lower switch-off position, the razor blade 4 protrudes in a non-driven state and can be cleaned without any trouble.
If the edge shaving blade 4 is in the protruding position and the inner cutter 2 is driven, that is, if the switch knob 17 is slid upward and the operating knob 40 is slid downward, the shaving operation can be performed. becomes.

〔Effect of the invention〕

Therefore, according to the present invention as described above, even if one tries to slide the operation knob 40 in the switch-on direction by mistake for the switch knob 17 when shaving, for example, the razor blade 4 can be prevented from protruding inadvertently. do not have. There is no possibility of accidentally operating both knobs 17 and 40 at the same time. As a result, it is advantageous when both knobs 17, 40 are disposed relatively close to each other and at approximately the same height position.

Furthermore, when shaving, the switch knob 17 and the operation knob 40 must be slid in opposite directions, but at that time, the thumb of the hand that grips the main body case 1 is used to move one knob in one direction, and the thumb that is It is easy to operate by moving the other knob in the other direction. Even when operating both knobs 17 and 40 individually with both hands, if the directions of pushing and movement are opposite to each other, the operating forces are balanced and operability is good.

〔Example〕

The drawings show an embodiment of an electric shaver according to the invention.

In FIGS. 1 and 2, the upper part of the main body case 1 includes an inner cutter 2, an inner cutter drive mechanism 3 that reciprocates the inner cutter 2 in the left and right directions with a constant small stroke, and a clipper-type When the fixed blade 4a and the movable blade 4b are provided, the razor blade 4 is installed, and the outer blade 5
is detachably attached via an outer cutter holder 6, and the inner cutter 2 comes into sliding contact with the inner surface of the outer cutter 5.

In FIG. 2, the inner blade drive mechanism 3 has a balance weight 8 fixed to the motor output shaft 7, and an eccentric pin 9 implanted in the weight 8 is engaged with a vibrator 10, so that the vibrator 10 vibrates left and right. The holder 12 of the inner cutter 2 is connected to the shaft 11 that stands up from the vibrator 10, and the inner cutter 2 elastically contacts the inner surface of the outer cutter 5 and reciprocates in the left and right directions. do. A bifurcated protrusion 13 for driving a razor blade is protruded from the front surface of the vibrator 10. The function of this protrusion 13 will be described later.

In FIGS. 2 and 3, the razor blade 4 faces the notch on the front surface of the outer blade holder 6, and its upper end is pivotally supported to the main body case 1 via left and right pins 14. , as shown by the imaginary line in FIG. 2, it is switched between a posture in which it swings upward approximately 90 degrees around the pin 14 and protrudes forward, and a retracted posture as shown in the solid line in the figure. Only when the edge razor blade 4 is in the protruding position, a tongue piece 15 protruding from the upper part of the edge razor blade 4 is provided.
faces inward of the case and engages with the aforementioned bifurcated protrusion 13, and the movable blade 4b of the razor blade 4 engages with the inner blade drive mechanism 3.
It is connected to and becomes capable of reciprocating movement.

Inside the main body case 1, a rechargeable battery 16, an electric motor (not shown) driven by the rechargeable battery 16, and electric circuits for charging and driving the motor are incorporated. There is a sliding switch knob 17 that can be operated in three stages.

When the switch knob 17 is in the lower position, it is in a switch-off state, and when the knob 17 is pushed up to the middle position, the built-in electric motor is energized and the inner blade drive mechanism 3 is operated, and the knob 17 is then moved to the upper position. When pushed up to the position, the edge razor blade 4 protrudes forward while the inner cutter 2 is driven, and at the same time as the tongue piece 15 engages with the bifurcated protrusion 13, the edge razor blade 4 is pushed forward.
becomes activated.

Next, the mechanism for moving the razor blade 4 in and out using the switch knob 17 will be explained based on FIGS. The pins 18 are inserted into the case through the left and right vertical holes 19 formed in the front wall of the main body case 1, and the protruding tips of the pins 18 are inserted into the connection holes 21 formed in the switch operation piece 20 installed inside the main case. The switch knob 17 and the switch operation piece 20 are integrated by being engaged and fixed.

A positioning arm 22 that can be elastically deformed in the left-right direction is connected to the lower edge of the switch operation piece 20, and a locking arm 23 that can be elastically deformed in the front-rear direction (internal and external directions) is attached to the upper edge of the switch operation piece 20.
are installed on the left and right. The left and right positioning arms 22 each have upper and lower protrusions 24 protruding from the inner surface of the case.
Switch operation piece 2
0 and the switch knob 17 integrated therewith are positioned and regulated in three positions: upper, middle, and lower.
Each left and right lock arm 23 is a switch operation piece 20
When the operation piece 20 is at the lowest position, the operation piece 20 abuts and engages with the lower edge of the protrusion 25 provided on both sides of each vertical hole 19.
The contact restricts the movement upward.

The switch knob 17 is equipped with a lock release button 26 that can be freely retracted. Left and right pins 27 protruding from the button 26 face the tip of the lock arm 23 through each vertical hole 19, and the button 26 is pushed toward the inside of the case. When pushed in, the tip of the lock arm 23 is pushed by the pin 27 and elastically deforms backwards and detached from each protrusion 25, allowing the switch knob 17 to be pushed up.

Inside the main body case 1, a plate-shaped razor blade extension/retraction operating member 30 is arranged so as to be movable up and down.
A tip end hook portion 31a of an arm 31 extending upward from the advancing/retracting operation member 30 engages with the upper edge of the side end rib 32 of the razor blade 4, as shown in FIG.
Due to this engagement, when the extension/retraction operation member 30 is pulled downward, the edge razor blade 4 is swung up and protruded to the front of the case, and when the extension/retraction operation member 30 is pushed upward, the edge razor 4 is placed in the retracted position. Become.

Inside the main body case 1, there is a pin 33 between the left and right.
The balance arm 34 has a balance arm 34 which is pivotally supported by a lever, and one end of the balance arm 34 is connected to the egress/retraction operation member 30 by a pin 35. The tip of the contact arm 36 connected from the switch operation piece 20 is connected to the balance arm 3.
4. The arrangement relationship is such that it comes into contact with the other end of 4. In such a case, the switch operation piece 20 will be replaced by the switch knob 17.
When the switch knob 17 is pushed up one step from the lower position to the middle position by the operation, the hook-shaped tip of the contact arm 36 engages in the notch recess 37 formed at the other end of the balance arm 34, and then the switch knob 17 is pushed up one step from the lower position to the middle position. When the second push-up operation is performed from the position to the upper position, the balance arm 34 swings clockwise, and the ejection/retraction operation member 30 is pulled down and the razor blade 4 protrudes. Furthermore, when the operation piece 20 is pushed down from the upper position to the middle position, the hook-shaped tip of the contact arm 36 remains engaged with the notch recess 37, so the balance arm 3
4 returns to the counterclockwise direction, and the razor blade 4 retracts. When the operating piece 20 is further lowered from the middle position to the lower position, the contact arm 36 is automatically removed from the balance arm 34.

An engagement recess 38 is formed on the side edge of the egress/retraction operation member 30, and a protrusion 39 that engages and disengages with this recess 38.
An operation knob 40 having an operation knob 40 is attached to the outer surface of the side wall of the main body case 1 so as to be slidable between two upper and lower positions. The upper end of the operating knob 40 is elastically deformable in the outward and outward directions, and the protrusion 39 is located on the inner surface of the upper end of the operating knob 40. When the operation knob 40 is slid to the upper position and the egress/retraction operation member 30 is in the pushed-up position, the protrusion 39 is disengaged from the engagement recess 38 and is placed in an opposing arrangement.

When not in use, switch knob 17
is in the lower position, and the operating knob 40 is located in the upper position, and the retracting/extracting operating member 30 is in the raised state and the razor blade 4 is in the retracted position.

Now, when the operating knob 40 is pushed inward of the case with the switch knob 17 in the lower position, the protrusion 39 of this engages with the engagement recess 38 of the egress/egress operating member 30, and then the operating knob 40 is moved to the first position. When the razor blade 4 is slid in the downward direction indicated by arrow P' in the figure, the razor blade 4 is switched from the retracted position to the protruded position via the extension/retraction operation member 30 in a non-driven state. In this state, the razor blade 4 will be cleaned.

From the unused state, slide the switch knob 17 in the upward direction shown by arrow P in FIG.
When P' is slid in the downward direction, the edge razor blade 4 is driven in a protruding state, allowing edge shaving. In this case, for example, the user would push up the switch knob 17 with the thumb of the left hand gripping the main body case 1, move the thumb to the operating knob 40 with the thumb extended, and then pull down the operating knob 40.

However, the switch knob 17 in the illustrated example is
Since it also serves as an opening/exit operation for the shaving operation, especially when transitioning from shaving work to close shaving work, simply slide the switch knob 17 from the middle position to the upper position while keeping the operation knob 40 in the upper position. When the switch knob 17 is returned to the middle position from this state, the outer razor blade 4 is placed in the retracted position and only the inner cutter 2 is placed in the driving state again.

Further, when the operation knob 40 is pressed down, the protrusion 39 is engaged with the engagement recess 38, and when the operation knob 40 is pushed up, the razor blade 4 is retracted and the protrusion 39 is removed from the engagement recess 38. It returns to its original state. Then, by pressing down the operation knob 40 and sliding the switch knob 17 upward to the middle position and then to the upper position while keeping the edge razor blade 4 protruding, the edge razor blade 4 will be automatically driven. Become.

[Another embodiment example]

In the illustrated example, the operation knob 40 is as described above.
may be always engaged with or integrally connected to the egress/retraction operation member 30, and moved together with the switch knob 17 when the switch knob 17 is switched between the middle position and the upper position.

[Brief explanation of drawings]

The drawings show an embodiment of the electric shaver according to the present invention, in which Fig. 1 is an overall perspective view, Fig. 2 is a partially cutaway side view thereof, and Fig. 3 is a front view of the main parts seen from the back side. FIG. 4 is an exploded perspective view showing a mechanism for moving the razor blade forward and backward, which is one of the constituent members of the present invention, and FIG. 5 is a side view illustrating the operating state in which the razor blade is extended. DESCRIPTION OF SYMBOLS 1... Main body case, 2... Inner blade, 3... Inner blade drive mechanism, 4... Edge razor blade, 5... Outer blade, 17... Switch knob, 30... Exit/exit operation member, 40... Operation Knob.

Claims (1)

[Claims] 1 It is attached to the main body case 1 so as to be freely retractable in the protruding position and the retracting position, and can freely slide on the razor blade 4 and the main body case 1 when it is connected to the drive system of the inner cutter 2 and can be driven in the protruding position. A sliding switch knob 17 is attached to the main body case 1 to switch the drive power of the inner blade 2 on and off, and a slide switch knob 17 is attached to the main body case 1 to move the razor blade 4 into an extended position and a retracted position, respectively. It is equipped with a sliding operation knob 40 for switching operation, and the sliding operation direction of the switch knob 17 for switching the drive power of the inner blade 2 from OFF to ON, and the direction of the sliding operation of the switch knob 17 for switching the driving power of the inner blade 2 from OFF to ON,
An operation knob 40 for switching from the retracted position to the protruded position
An electric shaver characterized in that the sliding operation direction of the razor is set in the opposite direction.