JPS62387A - Electric razor - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electric shaver equipped with a shaving blade when moving in and out, and its main object is to facilitate driving operation and cleaning of the shaving blade.

Conventional electric razors have one slide-type sui-nochinob.
If you slide the switch knob to the second step, the inner blade drive mechanism will operate, and if you further slide the switch knob to the second step, the inner blade drive mechanism will continue to operate and the razor blade will protrude to the outside of the front of the main case, and in this protruding position. The outer razor blade was connected to and driven by the inner blade drive mechanism.

According to this, it is possible to switch between the normal shaving state and the shaving state with a series of stepwise slide operations of a single switch knob, and since the shaving blade is driven when it is protruded, operability is improved. Excellent in that respect. However, in this case, the razor blade is always driven when it is in the protruding position, so it is not possible to clean the razor blade in a non-driven state with a rechargeable electric shaver. Furthermore, in electric shavers that use a dry cell battery or an external power source as a power source for the drive motor of the inner blade, it is possible to operate the razor blade in a non-driving state by removing the dry cell battery or turning off the external power source.

This is troublesome.

In order to eliminate this inconvenience, a switch knob dedicated to turning on and off the inner blade drive mechanism and a knob dedicated to advancing and retracting the edge razor blade are provided separately, so that the edge razor blade can be protruded and operated without being driven. It has been proposed that However, this method has a drawback in that it is not easy to operate, since it is necessary to move the razor blade in and out in addition to turning the switch knob on and off.

Focusing on this fact, this invention takes advantage of the advantage of the method of sliding the switch knob in two steps from the switch-off position, that is, the excellent operability, and uses a dedicated knob to move the razor blade in and out. Allows for protrusion operation under non-driving conditions.

The purpose is to make it possible to clean the razor blade without any trouble.

Specific examples thereof will be explained below based on the drawings.

The drawing shows an example of a rechargeable electric shaver, which has an inner blade 2 on the top of a main body case 1.

An inner blade drive mechanism 3 that reciprocates the inner blade 2 in the left and right lateral directions with a constant small stroke, a razor blade 4 having a clipper-type fixed blade 4a and a movable blade 4b, and a porous screen-shaped outer blade. A blade 5 is detachably attached via an outer blade holder 6, and the inner blade 2 is in sliding contact with the inner surface of the outer blade 5.

In FIG. 2, the inner blade drive mechanism 3 fixes a balance weight 8 to the motor output shaft 7, engages a bottle 9 implanted in the weight 8 with a vibrator 10, and causes the vibrator 10 to vibrate left and right. Assume that the inner cutter 2 is placed from the vibrator 10 to the vertically installed bin 11.
The inner cutter 2 elastically contacts the inner surface of the outer cutter 5 and reciprocates in the left and right lateral directions. and.

A bifurcated protrusion 13 for driving a razor blade is protruded from the front surface of the vibrator 0. The function of this protrusion 130 will be described later.

In FIGS. 2 and 3, the outer razor blade 4 is attached to the outer blade holder 6.
1 facing the notch on the front of the main body case 1 and the left and right bins 1
4, the bottle 14 is pivoted so as to be able to swing up and down, as shown by the imaginary line in FIG. The approach attitude shown in FIG. Then, only when the edge razor blade 4 is in the protruding position, the tongue piece 15 protruding from the upper part of the edge razor blade 4 faces inward of the case and engages with the aforementioned bifurcated protrusion 13.
The movable blade 4b of the razor blade 4 is connected to the inner blade drive mechanism 3 and becomes capable of reciprocating movement.

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 built into the main body case 1.On the front of the main body case 1, there are three stages (top, middle, and bottom). There is a sliding switch knob 17 that is operated to switch between the two positions.

When the switch knob 17 is in the lower position, the switch is off, 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 continues to operate. When pushed up to the upper position, inner blade 2
While in the driven state, the edge razor blade 4 projects forward, and at the same time as the tongue piece 15 engages with the bifurcated protrusion 13, the edge razor blade 4 becomes driven.

Next, at this time, the mechanism for moving the razor blade 4 in and out is shown in FIGS. 3 and 4.
To explain based on the figure, a pair of left and right connecting pins 18 are provided protruding from the back surface of the switch knob 17.

Each pin 18 protrudes into the case through the left and right vertical holes 19 bored in the front wall of the main body case l, and the protruding tip of each pin 18 connects to the switch operation piece 20 installed inside the main body case. The switch knob 17 and the switch operation piece 20 are integrated into the hole 21 by being inserted into and fixed thereto.

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 an interlock 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. Arms 23 for use are connected to the left and right. The left and right positioning arms 22 come into contact with and pass over the upper and lower protrusions 24 protruding from the inner surface of the case, thereby forming the switch operation piece 20 and the switch knob 17 integrated therewith.
This is for positioning and regulating the three positions of upper, middle and lower. When the left and right interlock arms 23 are at the lowest position of the switch operation piece 20.

This is for abutting and engaging the lower edges of protrusions 25 provided on both sides of each vertically elongated hole 19 to prevent the operating piece 20 from moving upward.

The switch knob 17 is equipped with a lock release button 26 that can be freely retracted.
7 is connected to the interlock arm 23 through each vertical hole 19.
When facing the tip of the interlock arm 23 and pushing the button 26 inward into the case, the tip of the interlock arm 23 is pushed by the pin 27 and elastically deforms backwards and detaches from each protrusion 25, which causes the switch knob 17 to be pushed up. becomes operable.

Inside the main body case 1, a plate-shaped baffle blade extension/retraction operating member 30 is arranged to be movable up and down.

A hook portion 31a at the tip end of the arm 31 extending upward from the advancing/retracting operation member 30 engages with the upper edge of the side lip 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 l, there is a balance arm 34 which is pivotally supported between the left and right by a pin 33, and one end of the balance arm 34 is connected to the egress/retraction operation member 30 by a pin 35. The distal end of the abutting arm 36 connected from the switch operation piece 20 is arranged to abut against the other end of the balance arm 34. In this case, when the switch operation piece 20 is pushed up one step from the lower position to the middle position by operating the switch knob 17, the hook-shaped tip of the abutment arm 36 moves into the notch recess 37 formed at the other end of the balance arm 34. When the switch knob 17 is subsequently pushed up from the middle position to the upper position, the balance arm 34 swings clockwise, and the egress/egress operation member 30 is pulled down. The razor blade 4 protrudes at the end.

Further, when the operating piece 20 is pushed down from the upper position to the middle position, the hook-shaped tip of the contact arm 36 is pushed into the notched recess 37.
The balance arm 34 is rotated counterclockwise and the razor blade 4 is retracted. Operation piece 2
0 is further lowered from the middle position to the lower position, the abutment arm 36 is automatically removed from the balance arm 34.

An engagement recess 38 is formed in the side edge of the egress/egress operation member 30, and an operation knob 40 having a protrusion 39 that engages and disengages with the recess 38 slides on the outer surface of the side wall of the main body case 1 over two positions, upper and lower. It is attached freely. Operation knob 40
The upper end of the protrusion 39 is elastically deformable in the inner and outer directions.
is located on the inner surface side of the upper end of this operating knob 40.

and.

When the operation knob 40 is slid to the upper position and the egress/egress operation member 30 is in the raised position, the protrusion 39
are disengaged from the engagement recess 38 and are arranged to face each other.

In such a case, slide the switch knob 17 to the upper position, and when the razor blade 4 is protruding and being driven, the egress/egress operation member 30 is pulled down, so the operating knob 40 in the upper position is used for egress/egress operation. It does not engage member 30. In this state, the shaving operation is in progress. However, when the operating knob 40 is pushed inward of the case while the switch knob 17 is kept in the lower OFF position, the protrusion 39 engages with the opposing engagement recess 38. If the operation knob 40 is pressed down in this state, the razor blade 4 can be directly operated to protrude in a non-driving state. In this state, the razor blade 4 will be cleaned. 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 retracts and the protrusion 39 is engaged with the engagement recess 38.
9 is returned to its original state in which it is removed from the engagement recess 38. By the way,
When the operating knob 40 is pressed down and the razor blade 4 is left protruding, the switch knob 17 is slid to the upper position.
The razor blade 4 will then be automatically driven.

Note that the example shown in Figure 3 was configured as described above, but the operation knob 4
0 may be always engaged with or integrally connected to the egress/retreat operation member 30 so that it moves together with the switch knob 17 when the switch knob 17 is switched between the middle position and the upper position.

As explained above, according to the present invention, in the normal shaving state in which the switch knob 17 is slid from the lower OFF position to the middle inner blade drive position, the switch knob 17 is pushed upward to the upper position. The edge razor blade 4 can be made to protrude in the driven state by simply pressing the switch knob 17, and the drive of the edge razor blade 4 can be stopped and retracted by simply returning the switch knob 17 from the upper position to the middle position, resulting in improved operability and safety. Excellent. Nevertheless, since the switch knob 17 can be set to the lower OFF position and the special operation knob 40 can be used to project the razor blade 4 in a non-driving state, cleaning the razor blade 4 is not a problem at all. You can do it without any problems.

Furthermore, as a means for enabling independent operation of the operation knob 40, the contact arm 36 and the balance arm 34 are provided between the switch operation piece 20 and the egress/exit operation member 30. 40 and the switch knob 17 so that they always move together, and the operation knob 4
Compared to a configuration in which a separate electric circuit is provided to cut off the motor drive when the razor blade 4 is extended when the razor blade 4 is extended, the present invention has a simple structure and can be implemented at low cost.

Further, although this invention is particularly effective in a rechargeable electric shaver in which the inner blade drive mechanism 3 is always activated by turning on the switch knob 17 and cannot be turned off, it is not applicable to an electric shaver that uses dry batteries or an external power source. too,
Leave the batteries in.

Alternatively, it is convenient to be able to clean the razor blade 4 while it is connected to an external power source.

[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, and Fig. 3 is a front view of the main parts seen from the back side. 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 showing the operating state of the razor blade in its protruding state. 1... Main body case. 2...Inner blade. 3...Inner blade drive mechanism. 4... Edge razor blade. 5... Outer blade. 13... Bifurcated process. 15... Protrusion. 17...Switch knob. 20...Switch operation piece. 30... Exit/exit operation member. 34... Balance arm. 36...Abutment arm. 37...Notch recess formed in the balance arm. 38... Engagement recess provided in the exit/exit operation member. 39...Protrusion provided on the operation knob. 40...Operation knob.

Claims (1)

[Claims] (1) Inner blade 2 that slides into contact with the inner surface of outer blade 5 on main body case 1
A sliding switch knob 17 that can be operated to switch between upper, middle, and lower positions is installed on the outer surface of the main body case 1. The case has a switch operation piece 20 that moves together with the switch knob 17, and when the switch operation piece 20 is in the lower position, the driving of the inner blade drive mechanism 3 is stopped, and the switch operation piece 20 is in the middle position and the upper position. The razor blade 4 is provided with an electric circuit that drives the inner blade drive mechanism 3 when it is in the position, and when the razor blade 4 is placed on the outer surface of the body case 1, it protrudes to the outside of the body case and retracts into the body case side. and a means for driving the edge razor blade 4 by transmission connecting the edge razor blade 4 to the inner blade drive mechanism 3 only when the edge razor blade 4 is in the protruding posture. An egress/egress operation member 30 for moving the edge razor blade 4 in and out is arranged in the main body case so as to be vertically movable, and the egress/egress operation member 30 and the edge razor blade 4 are the egress/egress operation member. 30 is moved upwardly, the edge razor blade 4 is placed in the retracted position, and when the egress/retraction operation member 30 is moved downward, the edge razor blade 4 is switched to the protruding position; A balance arm 34 is pivotably supported,
One end of the balance arm 34 is connected to the withdrawal/exit operation member 30 so that the withdrawal/exit operation member 30 moves up and down with the swinging of the balance arm 34; The contact arm 36 extends from the switch operation piece 20, and the contact arm 36 is connected to the other end of the balance arm 34 when the switch operation piece 20 is in the lower position. The abutting arm 36 is detached from the balance arm 34 and is in contact with the balance arm 34 when the switch operation piece 20 is in the middle position and the upper position, and the contact arm 36 is in contact with the balance arm 34 when the switch operation piece 20 is in the middle position and the upper position. By switching to the balance arm 3
4, the egress/egress operation member 30 in the upper position is pulled down, and when the switch operation piece 20 is switched from the upper position to the middle position, the egress/egress operation member 30 is pushed up via the balance arm 34. , A sliding operation knob 40 dedicated to operating the razor blade in and out is mounted on the outer surface of the main body case 1, and a means for connecting the operation knob 40 and the ingress and egress operation member 30 is provided. Features an electric razor.