JPS60106487A - 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 An object of the present invention is to provide an electric shaver that is convenient to carry, especially when traveling, and is easy to use.

When it comes to electric razors, it is easier to shave if the outer blade part is of a moderate size and protrudes from the grip part of the main body case. Therefore, the outer cutter portion is generally provided upwardly or in an inclined manner at the upper end of the main body case provided with the inner cutter drive means. However, even if an attempt is made to make the main body case more compact by downsizing the inner blade drive means such as motors and batteries, if the relatively large diameter outer blade remains as it is and remains in the protruding state, it is practically impossible to do so. The bulkiness of the bag doesn't change much, and it has a rather oversized shape, which makes it difficult to fit into bags, etc.

From this point of view, the present invention has a blade unit having inner and outer blades installed in a cavity formed in the main body case so that it can be moved in and out, and when not in use, the blade unit is retracted into the main body case, making the entire razor compact and not bulky. The first purpose is to make it portable and to make the blade unit protrude during use to improve usability.

And in such an electric shaver.

Focusing on the operating direction of the egress/egress operating tool that moves the blade unit in and out, even when the main body case is made thinner, the amount of protrusion of the blade unit can be increased, and the egress/egress operating tool can be easily operated. The second purpose is to do so. In other words, the first
Figure 0 shows a comparative example (2) which was given to understand the advantages of the arranged blades of the egress/egress operation tool according to the present invention, in which the egress/egress operation tool 6 of the blade unit 5 is If it is the same as the direction A, the stroke P' of the operating tool 6 is small and can only be taken within the thickness of the main body case l. Therefore.

The amount of protrusion of the blade unit 5 becomes small, making it difficult to use. The smaller the stroke, the greater the instantaneous operating force required. Furthermore, it is difficult to operate the egress and egress operation tool 6 with the thumb of the hand that grips the main body case 1. There are disadvantages and inconveniences. The present invention attempts to improve this point as well.

Hereinafter, the details will be explained based on the drawings. FIGS. 1 to 3 show an example of an electric shaver according to the present invention, in which a main body case 1 has an upper half 1a that is open at the front and is connected to the upper half 1a. The lower half part 1b has a cylindrical shape that is easy to grip.

Inside the lower half 1b is a rechargeable main battery 2. Spare batteries 3.
A charging plug 4 and means for ejecting and retracting it are built in, and a rotary blade unit 5 is built into the front of the case upper half 1a so as to be movable in the front and rear directions. and 3
On the side surface of the main body case 1, an egress/egress operation tool 6 which also serves as a switch (3) knob for the blade unit 5 and a knob 7 for egress/egress operation of the charging plug 4 are provided so as to be slidable in the vertical direction.

In FIG. 4, the blade unit 5 includes a housing 9 in which a motor 8 is laterally fitted and supported, a porous screen-shaped outer blade 11 attached to the outer end opening of the housing 9 via a holder 10, and a motor rotating It consists of an inner cutter 14 that is attached to the shaft 12 via a holder 13 and makes sliding contact with the outer cutter 11. The upper half 1a of the main body case 1 has a cavity S that is open at the front.
The entire blade unit 5 is located in the cavity S.
It is supported so as to be slidable in the front-rear direction within the slider 15 which is internally supported so as to be rotatable around the front-rear horizontal axis.

In FIG. 6, left and right pairs of cam grooves 16 and 17 are formed on the outer circumferential surface of the housing 9 of the blade unit 5 at positions shifted by 180°, and these cam grooves are formed on the inner circumferential surface of the sliderrick 15. It has pins 18 and 19 that fit into the pins 16 and 17. One of the pins 18 also serves as a connecting pin for the egress and egress operation tool 6 that is inserted into the slider 15 from the outside and connected to the slider 15 by a link (4).

The housing 9 is prevented from rotating by engaging with a stopper 20 erected from the inner wall surface of the upper half portion 1a of the case, and slides only in the front-back direction.

The cam grooves 16 and 17 have front half portions 16a and 17a that are inclined with respect to the axis of the slider 15.

It has rear half parts 16b and 17b along the circumferential direction, and when the sliderrick 15 is rotated by operating the egress/retraction operation tool 6 up and down along the guide groove 21, the inclined front half part 1 of the cam grooves 16 and 17 is rotated.
The blade unit 5 moves forward and backward with a constant stroke due to the cam action of the pins 6a and 17a and the pins 18 and 19.

What should be noted here is that the advancing/retracting operation tool 6 is slid in a direction perpendicular to the extending/retracting direction (back and forth direction) of the blade unit 5. According to this, compared to the comparative example shown in FIG. 10 along the extending and retracting direction of the blade unit 5 as shown in FIG. The stroke P of 6 can be made large even when the thickness of the main body case 1 is thin. Therefore, the amount of protrusion of the blade (5) unit 5 can be increased. Furthermore, since the main body case 1 can be operated in the vertical direction with, for example, the thumb of the hand holding the main body case 1, the blade unit 5 can be easily moved in and out.

As shown in FIG. 8, a printed wiring board 22 having a circular upper part and a rectangular lower part is fixedly installed deep inside the main body case 1, and the circular upper part forms a slit-shaped opening 23 ( (see FIG. 6). A pair of sliding contact terminals 24 are fixed to the inner surface of the bottom wall portion 15a of the slider 15, and as the ring 15 rotates, a group of sliding contacts 25 arranged in an arc shape on the back surface of the board 22 Conduct or cut off in an appropriate combination.

A pair of terminals 26, 26 protruding from the back surface of the motor 8 and a pair of contacts 27, 27 on the printed circuit board 22 are electrically connected by a pair of terminal plates 28, 28 made of phosphor bronze. That is, on this terminal board 28.

A mounting hole 30 with a bite protrusion that is inserted into and fixed to a mounting boss 29 protruding from the back of the motor 8, and a motor terminal 26.
The terminal connection hole 3 (6) 1 is inserted into and connected to the terminal connection hole 3 (6) 1 and the arm 32 is elastically bendable.
2 is inserted into the mounting hole 33 of the printed wiring board 22 and connected to the contact 27. Therefore, even if the blade unit 5 moves significantly forward.

As shown in FIG. 9, the arm 32 of the terminal board 28 is expanded and deformed, and the electric circuit between the motor 8 and the power source remains connected.

By rotating the sliderrick 15, the blade unit 5 moves in and out and the motor 8 starts and stops at the same time. That is, the egress/egress operation tool 6 is moved to four positions fa shown in FIGS. 1 and 2.
) to +d), the following results.

(a) The position pins 18 and 19 are at the base ends of the cam grooves 16 and 17, and the blade unit 5 is retracted. At this time, power to the motor 8 is in an off state.

fb) The position bins 18 and 19 are located in the inclined front half 16a of the cam grooves 16 and 17.
- Corresponds to the terminal end of 17a, and the blade unit 5 is protruded. At this time, the power to the motor 8 remains off (7).

(C) The position pins 18 and 19 are the rear parts 16b and 1 of the cam grooves 16 and 17.
7b, and the blade unit 5 remains in the protruding state. At this time, the motor 8 is connected to the main battery 2 and is in an on state, which is the normal operating position.

The fd1 position bins 18 and 19 are the rear parts 16b and 1 of the cam grooves 16 and 17.
7b, and the protruding state of the blade unit 5 is maintained. In this case, the motor 8 is connected to the spare battery 3 and is in an on state. This position is used when the main battery 2 cannot be charged in time.

Each operating state of the sliderik 15 is controlled by a slit 46 with a locking step formed in the bottom wall 15a of the ring 15 and an elastically deformable locking pin 34 vertically installed on the inner inner wall of the main body case I. Resiliently maintained by stepped engagement.

Further, each operation state can be confirmed by looking at the display 48 attached to the outer peripheral surface of the extension portion 15b of the slider 15 (8) through the display window 35 formed on the side of the knob guide groove 21.

In FIG. 5, the charging plug 4 of the main battery 2 mentioned above is
A pair of sliding contact terminals 38, 38, which are implanted in a plastic plug holder 36 and supported so as to be freely retractable from the bottom surface of the main body case 1, and which are attached to a pedestal 37 inside the case, are attached to one side edge of each plug 4. They are in sliding contact, and thereby the transformer 39 of the charging circuit and the plug 4 are electrically connected. The front surface of the plug holder 36 is provided with a guide groove 40 having a tapered portion 40a that is wedged in the innermost part, into which a pair of legs 7a, 7a connected from the knob 7 made of plastic are engaged. . Further, from the knob 7, a pair of inner and outer locking recesses 42a and 42b formed on the inner edge of the guide groove 41 of the main body case 1 are provided.
Locking pieces 7b, 7b that can be engaged with are provided in a protruding manner, and the plug 4 can be selectively locked in a retracted state and a protruded state. Then, during the egress/retraction operation, the knob 7 is pushed inward while the leg 7a is deformed along the tapered portion 40a, and the locking piece 7b is kept removed from the locking recess 42a or 42b (9). When the knob 7 is slid in the forward/backward direction and the push-in of the knob 7 is released at the end of the stroke, the knob 7 is returned to the outside by the elastic restoring force of the leg 7a and the cam action of the tapered portion 40a, and becomes locked again. Further, whether or not the main battery 2 needs to be charged is determined by an indication from a pilot lamp 43 provided at the lower end of the front surface of the main body case 1.

The electric shaver of the present invention is equipped with a cover 44 made of transparent plastic that is fitted and attached from the front side when the blade unit 5 is retracted.

When the cover is attached, a part of the cover 44 interferes with the egress/retraction operating tool 6 to hold the operating tool 6 in the off position (al). A cleaning brush 45 is detachably attached inside the cover 44. Further, as shown in FIGS. 2 and 7, an example of the joint between the upper half 1a and the lower half 1b of the main body case 1 is provided with a recessed surface 47 on which the index finger can be hung in a non-slip manner. It has an easy-to-grip shape.

Although the illustrated example is as described above, the present invention is not limited thereto. For example, it is assumed that the egress/retraction operation (10) tool 6 is only operated from the above-mentioned (81 position) to the (b1 position), and the drive of the inner cutter 14 is intermittent with another switch knob at this fb position. Good. Again.

As a power source, a dry battery or an AC power source may be used.

Furthermore, the wiring between the motor 8 on the side of the blade unit 5 that moves back and forth 2 times and the electric circuit of the main body case 1 may be made using sliding terminals and contacts, or may be connected with lead wires as long as there is no fear of disconnection. It would be nice.

As explained above, according to the present invention, the blade unit 5 having the outer cutter 11 and the inner cutter 14 is attached to the cavity S formed in the main body case 1 so as to be retractable.

The blade unit 5 is operated to move in and out from the main body case 1 using an egress and egress operation tool 6. Therefore, when the blade unit 5 is not in use and the blade unit 5 is inserted, the entire razor can be reduced to the size of the main body case 1.

It fits easily in a bag and is convenient to carry.

Moreover, since the blade unit 5 protrudes from the main body case 1 during use, the 2 outer blade parts can be easily brought into contact with the skin, making it easy to use.

Furthermore, since the egress/egress operation tool 6 for moving the blade unit 5 in and out is arranged to be operated in a direction perpendicular to the egress/retraction direction of the blade unit 5, the egress/egress operation tool 6 can be operated while holding the main body case l. It is convenient to do. In addition, even when the thickness of the main body gauge 1 is made thinner to eliminate the bulkiness, the operation direction of the ejecting/retracting tool 6 may be set along the elongating/retracting direction of the blade 5 ->)
Compared to the configuration in which the blade unit 5 is pushed out, the stroke P of the retraction operation tool 6 for protruding the blade unit 5 can be increased, making it possible to make the blade unit 5 protrude greatly for ease of use, and also allows for light operation. It also has the advantage of being able to

[Brief explanation of drawings]

FIG. 1 is an overall external view showing a specific example of an electric shaver according to the present invention, and FIG. 2 is a partially cutaway front view. Fig. 3 is a side view, Fig. 4 is a sectional view taken along the line IV-IV in Fig. 3, Fig. 5 is a perspective view of the charging plug, Fig. 6 is a longitudinal sectional side view, and Fig. 7 is a -■ Line cross-sectional view, No. 8
The figure is an exploded perspective view of the electric circuit structure for the motor, and FIG. 9 is a side view showing the motor drive section when the blade unit is extended. FIG. 10 is a schematic perspective view of a comparative example given to aid understanding of the present invention. l...Body case. 2...Battery. 5... Blade unit 6... Exit/exit operation tool. 8...Motor. 9...Blade unit housing. 11... Outer blade. 14...Inner blade. 15...Switch ring. S...Cavity part. P... Stroke of the exit/exit operation tool. (13) - Figure 10 Figure 1 Figure 2 JP-A Sho GO-106487 (6) Figure 3 JP-A Sho GO-10G487 (8)

Claims (1)

[Claims] fl) A cavity S is formed in the main body case 1, and a blade unit 5 having an outer cutter 11 and an inner cutter 14 that comes into sliding contact with the inner surface of the cavity S is attached in a removable manner, and the blade unit 5 is not allowed to come out. An electric shaver characterized in that an advancing/retracting operating tool 6 for retracting is arranged so as to be operated in a direction perpendicular to the extending/retracting direction of the blade unit 5.