JPS60174029A - Power source for charging type electric device - 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] [Technical Field] The present invention relates to electric appliances, electric appliances, etc. powered by storage batteries.
For example, power supplies for devices whose usage is limited to a single use, such as electric sleds, electric hair clippers, and electric cleaners.

[Prior art]

Conventionally, in this type of rechargeable electrical equipment, for example, in the case of an electric sled, a motor is driven by a Ni-CD storage battery as a power source, and the connected inner blades of the motor are connected to a net-shaped outer blade. The inner cutter is brought into pressure contact with the blade, and the beard is cut by the rotation and reciprocating vibration of the inner cutter. However, N
In the case of a t: -Cd storage battery, the voltage drops rapidly when the battery runs out, so it is difficult for the user to intuitively know the remaining capacity of the storage battery. Therefore, the battery runs out in the middle of shaving, which is a very dissatisfying phenomenon for the user. Therefore, recently, in an attempt to solve this problem, a system has been developed that detects the drop in the terminal voltage of a storage battery and notifies the user by some kind of display means when the voltage reaches a certain level. Due to variations in the discharge characteristics of the battery, temperature characteristics of the detection circuit and storage battery, etc., it was not possible to accurately display the data, and the results were insufficient. ,
Moreover, since the voltage of the storage battery that is the power source for the drive force is almost constant, there is no ossification, and when the beard is thick or long, there is a feeling that the power is insufficient at the beginning of shaving.

〔the purpose〕

The present invention solves the above-mentioned two problems and provides a power supply device for rechargeable electrical equipment that satisfies users.

〔overview〕

The outline of the present invention is to use a plurality of storage batteries with different capacities, use the difference in capacity of the storage batteries as the number of spare customers, and further change the voltage applied to the load by increasing or decreasing the number of storage batteries to increase or decrease the driving force. It's about doing.

〔Example〕

Hereinafter, one embodiment of the present invention will be described based on the drawings.
FIG. 1 is a specific circuit diagram of the present invention.

α, b indicate terminals connected to commercial power supply, and specific VC
is the plug blade, T step-down transformer, Dl.

B2 is a rectifier diode, which is connected in series to D+key -cd storage battery B+ and %D2 dNi-Cd storage battery B2, and further, IcDI・B+ and B2・B2 are connected in parallel to connect the secondary side voltage of step-down transformer T. has been done. In addition, IM-CD storage batteries B1 and B2 are used with different capacities, and in the example, B] is approximately 50077+,
AA and B2B are set to approximately ・aaamAh, and the capacity of B2 is set smaller than that of B+. In addition, each terminal of the Ni-CD storage battery is connected to each contact of a three-pole switch S8/84 that operates in conjunction with each other, but the ■ pole of the Ni-CD storage battery Bl is connected to the ■e■ contact of the switch 84. Polar (Ni-Oc
The 0 pole of the Ni-Cd storage battery B2 is connected to the ■ contact of the switch S3, and the O pole of the Ni-Cd storage battery B2 is connected to the ■ contact of the switch Bs, as well as the transistor Tγ and the diode D.
It is connected to the ■ contact point of the switch S3 via the terminal 3. Note that the base of the transistor Tr is connected to the O pole of the Ni--Cd storage battery B2 through a resistor R2 and a switch S2f. The three-pole switch Sg is also connected to the load via the common open switch BS of '84. The example shows an example of application to an electric shaver, so the load is a motor M.
It is. In this case, switches S1 and 82 are configured to work together. Next, to explain the operation of the circuit configuration described above, the secondary side step-down output of the step-down transformer T by connecting the terminals a and b to the commercial power supply Ni'-crt storage battery B,
and charge B2. Since the Ni-CD storage batteries B1 and B2 have different capacities, the charging current is also different, but the adjustment is made by connecting the storage battery B2 with the smaller capacity with VCl2 in series, and using the current adjustment resistor R1 to drive the blade of the electric shaver. When driving the motor, the operation of the switch 1.2 shown in the external view of the electric shaver in FIG. 2 and the circuit diagram in FIG. 1' will be explained. First, the switch 2 shown in FIG. Switch S8. shown in FIG. When set to this position and turn on S, I, TE1 (equivalent to switches S, , S, in Fig. 1), motor Mt: is turned on by turning on storage battery B2. Driven. Next, set switch 2 (equivalent to switches S, , S, in Fig. 1) to position ■ and turn switch 1-f ON, the motor MF
It is driven by a series circuit of i storage batteries B, , and B2. But in this case - there are two problems. 1, the motor for driving a single storage battery cell is rated for snow pressure F! 1.2-1.5
7, and if h is driven at 2.41 degrees, the rotational speed will be higher than necessary, which will have a negative effect on the durability of the motor. For this reason, a diode D for step-down adjustment is connected. Another problem is that when the motor M is driven by connecting storage batteries B1r B2f in series, when the storage battery B2 with a lower capacity is used up, it will be reversely charged by the capacity of the storage battery B1, which will significantly shorten the battery life. . Therefore, both ends of the storage battery B2 are connected to the pace-emitter of the transistor Tf, and when the storage battery B2 approaches the end of life, the line is cut off as the transistor TrfO'FF'.
do. As a result of the above-described measures, the blade rotates at a higher speed and has a higher torque than when the switch 2 is in the ``■'' position, making it possible to provide a sharpness that satisfies long beards and dense beards. Next, when the storage battery is finished at the position (■), when switching to the position (2), the connection is made to both ends of the storage battery B1. This means that B+, which has a larger capacity than B2, will still have a volume t equal to the difference even when B2's capacity is exhausted, so even if the battery runs out in the middle of shaving, switch 2 can be turned on or off. By switching to position (2), the capacity for at least one shave can be obtained.

The switch S2 constituting the switch 1 prevents the storage battery B2 from discharging through the base and emitter of the transistor Tr.

〔effect〕

As described above, according to the present invention, if the battery runs out in the middle of use, it is possible to have a reserve capacity for at least one charge rather than switching the switch, so it takes a long time to charge the battery in the middle of use. You can use it continuously without waiting. In addition, since this reserve capacity uses the difference between multiple storage batteries, it is possible to effectively utilize the number of built-in storage batteries and supply the load with twice as much voltage as the number of built-in storage batteries, which eliminates the problem of overloads caused by insufficient power. It can be solved without any problem.

In addition, reverse charging of batteries with low capacitance, which occurs when storage batteries of different capacities are connected in series, is blocked by a switching element that detects the voltage of the #1 battery, thereby preventing shortening of the battery life due to reverse charging. It is something that can be done.

[Brief explanation of the drawing]

FIG. 1 is a circuit diagram of an embodiment of the present invention, and FIG. 2 is an external view of an electric shaver using the present invention. Bl, B2......Reservoirs and ponds with different capacities Applicant: Suwa Seikosha Co., Ltd.

Claims (1)

[Scope of Claims] 1) A power supply device for rechargeable electric equipment, characterized in that a plurality of storage batteries with different capacities are used, and the difference in capacity of the storage batteries is used as a reserve capacity. 2) Connecting multiple storage batteries in series and selectively supplying any voltage to the load by increasing or decreasing the number of storage batteriesf%-
A power supply device for a rechargeable electric device according to claim 1, in which: 3) A power supply device for a rechargeable electric appliance according to claim 1 or 2, further comprising a switch means for detecting when the minimum capacity storage battery is completed and cutting off the supply line f to the load.