JPH0445199B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electric shaver equipped with a detachable power supply case.

For example, electric razors commonly used at home are relatively large and have a large battery capacity, but this does not pose much of a problem. However, when carrying it with you when traveling, it is desirable that the battery capacity be small and that it be lightweight and compact. However, it is wasteful to prepare two types of electric razors.

Also, if the electricity goes out during or at the beginning of using the electric shaver, having a backup power source will be convenient as a makeshift emergency.

This invention was proposed in response to such a demand, and its basic configuration is an electric shaver equipped with a first power source for driving the inner blades.A separate power supply case equipped with a second power source for driving the inner blades is detachable. It is assumed that the electric shaver can be attached freely, and it goes without saying that the electric shaver can be used alone, but it can also be used with the power supply case attached to the electric shaver. The power supply is switched between the power source and the second power source as required.

Hereinafter, the details will be explained based on the drawings. FIGS. 1 to 4 show a first embodiment of the present invention, in which 1 is an electric shaver that functions independently;
is a power supply case that is detachably inserted into the lower outer periphery of the electric shaver 1, and is expected to be used with the power supply case 2 attached to the electric shaver 1 under normal conditions.

The electric shaver 1 has a head case 4 connected to the upper part of a main body case 3 having a rectangular cylindrical outer circumference, an outer cutter 5 that is detachable from the head case 4, and a reciprocating inner cutter inscribed in the outer cutter 5. 6, and a motor 7 and a first power source 8 for driving the inner cutter 6 are built into the main body case 3. This first power source 8 has a battery capacity of
We are expecting a small rechargeable battery of around 100mAh.

The main switch 9 has an operation knob 10 on the front surface of the main body case 3 for controlling the main switch 9 to turn on and off the power supply to the motor 7, and can be used alone as a normal electric shaver.

The power supply case 2 is formed into a rectangular tube shape with an open top and a bottom, and is connected to the main body case 3 of the electric shaver 1.
It is inserted into the outer circumferential part from below and is held. When the power supply case 2 is attached to the electric shaver 1, the head case 4 of the electric shaver 1
protrudes above the power supply case 2, and the operation knob 10 faces the outside through a window 11 formed in the front face of the power supply case 2, so that the electric shaver 1 can be used by grasping the power supply case 2. Reference numeral 2a denotes anti-slip pads formed at appropriate locations on the outer periphery of the power supply case 2, on the left and right sides in the figure.

A second power supply 12 for driving the inner blades 6 of the electric shaver 1 is built into the power supply case 2.

This second power source 12 includes a rechargeable battery 13 and a rechargeable battery 13.
and a charging means 14 for charging the battery. Rechargeable battery 13
For example, a battery having a capacity of about 500 mAh is used, which has a larger capacity than the rechargeable battery that is the first power source 8 on the electric shaver 1 side.

The charging means 14 is composed of a plug blade 15 that extends and retracts from the side surface of the lower end of the case, and a charging circuit 16 that converts the AC power input from the plug blade 15 into a predetermined charging voltage, as shown in FIG. The output ends of the charging circuit 16 are connected to both ends of the rechargeable battery 13, and charging voltage can also be supplied from the second power source 12 to the first power source 8 on the electric shaver 1 side via the power source connection means 17. .

As the power supply connection means 17, a connection plug 18 is provided protruding from the inner bottom surface of the power supply case 2, and a jack 1 is provided in which the connection plug 18 is inserted into the lower end surface of the electric shaver 1.
9, the charging voltage input to the electric shaver 1 side via the power supply connection means 17 is applied to both ends of the rechargeable battery 8 via the reverse flow prevention diode 20 connected in the forward direction. be done.

When the electric shaver 1 is used alone, the inner cutter 6 is driven by the first power source 8 via the motor 7. On the other hand, when the power supply case 2 is attached to the electric shaver 1, the inner cutter 6 is switched to be driven by the rechargeable battery 13 on the second power supply 12 side built into the case 2 via the motor 7. The switching means 21 includes a normally closed first switch 22 interposed between the first power source 8 and the main switch 9, and a second power source 12.
and a normally open second switch 23 interposed between the main switch 9, and the open/close states of both switches 22, 23 are reversed in conjunction with the attachment of the power supply case 2 to the electric shaver 1. For example, by using the jack 19 with a switch and using the switch as the first and second switches 22, 23, the electric shaver 1 can be connected to the power supply case 2, as shown in FIGS. 2 and 4a. When the main switch 9 is turned on and off, the first switch 22 opens and separates the rechargeable battery 8 inside the main body case 3 from the motor drive circuit, and at the same time the second switch 23 is closed. energization to the motor 7 is restricted. In this case, the rechargeable battery 8 on the electric shaver 1 side works as a backup, and the second
Even after the rechargeable battery 13 of the power source 12 runs out of capacity,
By simply pulling out the power supply case 2 from the electric shaver 1, continuous use is possible with only the first power supply 8 as shown in FIG. 4b.

If both the rechargeable batteries of the first and second power supplies 8 and 12 run out of capacity, the plug blade 15 can be inserted into a household outlet while the power supply case 2 is attached to the electric shaver 1. As shown in FIG. 4c, rechargeable batteries 8 and 13 are charged at the same time.

FIG. 5 shows another embodiment of the present invention, in which the inner blade 6 of the electric shaver 1 is of a rotary type instead of a reciprocating type, and the main body case 3 of the electric shaver 1 is fitted onto the upper part of the power supply case 2. It is designed to be fitted and connected to the matching groove 25 from the lateral side. Furthermore, main body case 3
The shape of the fitting groove 25 is made approximately circular, the power supply connection means 17 is made into a plate spring-like electrode, and the electric shaver 1 is connected to the power supply case 2 as shown by the dashed line.
The inclination angle of the electric shaver 1 with respect to the power supply case 2 can be changed back and forth when the electric shaver 1 is attached to the power source case 2. Further, by using the power cord 26 instead of the plug blade 15, the commercial AC power source can be used not only for charging but also for driving the motor 7.

FIG. 6 shows another embodiment of the present invention, in which the upper surface of the power supply case 2 can be detachably connected to the lower end of the electric shaver 1.
Switching means 21 and micro switch 27
using the actuator 20 of the switch 27.
By pressing in conjunction with the sliding operation of the operation knob 30 provided on the power supply case 2 side, the power source for driving the motor 7 in the state where the electric shaver 1 and the power supply case 2 are combined is changed to the first power source 8 or the second power source 8. The power source 12 can be selected and used as desired.

Note that changes such as making the first power source 8 and the second power source 12 have the same capacity, or conversely increasing the capacity of the first power source 8 are also possible.

As explained above, the present invention includes an electric shaver 1 and a power supply case 2 that is detachably attached to the electric shaver 1.
First and second power supplies 8 and 1 for driving the inner blade, respectively.
2, and when the power supply case 2 is attached to the electric shaver 1, the power supply for driving the inner blade is set to the first power supply 8 on the electric shaver side, or the second power supply on the power supply case side.
The power supply can be set to 12 or can be used selectively depending on the purpose. Therefore, the necessary power capacity can be secured depending on the usage situation. The electric shaver 1 itself can also be made as small and lightweight as possible.

More specifically, when the first and second power supplies 8 and 12 are composed of rechargeable batteries, the battery capacity of the second power supply 12 is made larger than that of the first power supply 8, as shown in the above embodiment. Under normal conditions, if the power supply case 2 is attached to the electric razor 1 and the inner blade 6 is driven by the second power supply 12, it can be used no different from the current electric shaver. I will have to remove electric razor 1 and take it with me. In that case, electric razor 1
Since this device itself is naturally small and lightweight, it functions as a dedicated travel device and is very convenient. In addition, if the second power source 12 is made up of a rechargeable battery 13 and a charging means 14, the rechargeable battery 13 of the second power source 12 and the first power source 8 rechargeable batteries can be charged at the same time, which is convenient. Of course, it also has the advantage that when the second power source 12 runs out of battery, the first power source 8 can be used as a makeshift. On the other hand, in normal conditions, the electric razor 1 is used alone, but in the event that the first power source 8 runs out of battery, the power source case 2 can be attached to allow continued use with the second power source 12. .

[Brief explanation of the drawing]

1 to 4 show a first embodiment of the present invention, FIG. 1 is a perspective view of the electric shaver and the power supply case separated, and FIG. 2 is a perspective view of the electric shaver and the power supply case. FIG. 3 is a perspective view of the combined state, FIG. 3 is an electric circuit diagram, and FIGS. 4 a to 4 c are explanatory diagrams showing operating conditions of the electric circuit. FIG. 5 is a perspective view showing another embodiment of the present invention. FIG. 6 is a front view showing still another embodiment of the present invention. 1...Electric razor, 2...Power case, 3...
...Electric razor body case, 4...Electric shaver head case, 5...Outer blade, 6...Inner blade, 7...
...Motor, 8...First power source (rechargeable battery), 9...Main switch, 10...Operation knob, 11...Counter, 12...Second power source, 13...Rechargeable battery, 14...
... Charging means, 17... Power supply connecting means, 21... Switching means, 22... First switch, 23...
...Second switch, 30...knob.

Claims (1)

[Claims] 1. An electric shaver 1 that functions independently and includes an outer cutter 5, an inner cutter 6 inscribed in the outer cutter 5, and a first power source 8 that drives the inner cutter 6; a power supply case 2 equipped with a second power supply 12 that is removably connected to the electric shaver 1 and capable of driving the inner cutter 6; power supply 1st power supply 8
Alternatively, a switching means 21 for selectively switching to the second power source 12 is provided, and the first power source 8 described above is a rechargeable battery, and the second power source 12 is composed of a rechargeable battery and a charging means for the rechargeable battery. An electric razor with a power supply case. 2. The electric shaver according to claim 1, wherein the battery capacity of the rechargeable battery serving as the first power source 8 is smaller than the battery capacity of the rechargeable battery provided in the second power source 12.