JP2594524Y2 - Electrical equipment - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric device having a storage battery and a motor driven by the storage battery.

[0002]

2. Description of the Related Art Conventionally, an electric razor (electric device) including a storage battery and a motor has been known. As shown in FIG. 3, the electric razor includes a rectifier circuit 2 for rectifying an AC voltage to charge a storage battery 1 and a motor 3 driven to rotate by the storage battery 1. The blade is driven to rotate or reciprocate.

The rectifier circuit 2 is provided on a circuit board 4 provided in a main body case (not shown). However, the storage battery 1 is not directly mounted on the circuit board 4 in consideration of safety against liquid leakage at the time of overcharge or deterioration. . Further, the motor 3 is arranged near the inner blade and at a position away from the circuit board 4.

For this reason, the storage battery 1 is connected to the lead wires L1 and L2.
Is connected to the rectifier circuit 2 of the circuit board 4 by the motor 3
Is connected to the rectifier circuit 2 via the leads L3, L4 and the switches 5, 6. When the switch 5 is turned on, the motor 3 is driven.

The switch 6 is linked with a plug (not shown) and is turned on when the plug is stored in the main body case and turned off when the plug is protruded from the main case. Charging is performed by protruding the insertion plug from the main body case and inserting the plug into an outlet. That is, since the switch 6 is turned off by the protrusion of the insertion plug from the main body case, a rectified current flows only in the storage battery 1 to be charged.

[0006]

However, in such an electric razor, the lead wires L1 to L4 connecting the storage battery 1 and the motor 3 to the rectifying circuit 2 of the circuit board 4 have four wires.
This is necessary, and the connection of the lead wires L1 to L4 is performed by manual soldering. Therefore, there is a problem that the operation is troublesome and leads to an increase in cost.

[0007] The present invention has been made in view of the above problems, and an object thereof is to provide an electric device capable of reducing the number of lead wires.

[0008]

According to the present invention, in order to achieve the above object, a rectifying circuit for rectifying an AC power supply and output terminals on the positive and negative sides of the rectifying circuit are provided on a circuit board. In an electric device including a storage battery charged by a circuit, a motor driven by the storage battery, and a power switch for turning on and off the motor, both positive and negative output terminals provided on the circuit board are provided. In the meantime, the motor and the storage battery are connected in series by a lead wire, and the power switch is connected between the two output terminals.

[0009]

According to the present invention, a motor and a storage battery are connected in series between a positive output terminal and a negative output terminal provided on a circuit board by a lead wire, and a power switch is connected between the output terminals. In addition, the number of lead wires connecting the storage battery and the motor to the rectifier circuit on the circuit board can be reduced.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an electric razor as an electric device according to the present invention will be described below with reference to the drawings.

In FIG. 1, reference numeral 10 denotes a main body case of an electric razor 11, on which an outer blade 12 is mounted. A charging plug 13 is provided on one side of the main body case 10 so as to be freely inserted and removed. An operation portion 14a of a power switch 14 described later is provided on the other side surface of the main body case 10. When the operation unit 14a is moved upward, the power switch 14 is turned on, and when the operation unit 14a is moved downward, the power switch 14 is turned off.

As shown in FIG. 2, the electric razor 11 includes a circuit board 20 and an inner blade provided inside the outer blade 12.
A motor 21 for reciprocating (not shown) and a storage battery 22 for driving the motor 21 are provided. The circuit board 20, the motor 21, and the storage battery 22 are provided in the main body case 10.

The circuit board 20 is provided with a rectifier circuit 23 for rectifying an AC power supply. The rectifier circuit 23 includes a low-frequency transformer 24 for stepping down a commercial AC voltage applied to a plug 13 inserted into an outlet (not shown). , And a diode 25 for rectifying the reduced AC voltage.

The circuit board 20 is provided with a positive output terminal 26 and a negative output terminal 27 of the rectifier circuit 23. The output terminals 26 and 27 are turned on and off in conjunction with the power switch 14 and the insertion and removal of the plug 13.
The charge switch 28 to be turned off is connected in series. The charge switch 28 is turned off when the plug 13 is pulled out from the main body case 10 and turned on when the plug 13 is stored in the main body case 10.

The cathode 21 a of the motor 21 is connected to the output terminal 26 of the rectifier circuit 23 by a lead 31, and the anode 21 b of the motor 21 is connected to the anode of the storage battery 22 via a lead 32. The cathode of the storage battery 22 is the lead 3
3 is connected to the output terminal 27 of the rectifier circuit 23.

When the plug 13 is housed in the main body case 10, the charge switch 28 is on, and when the power switch 14 is turned on, a current flows in the motor 21 in the direction of the arrow A by the storage battery 22 so that the motor 21 Is driven to rotate, whereby the inner blade reciprocates to shave away.

When the plug 13 is pulled out and inserted into an outlet (not shown), the charging switch 28 is turned off by pulling out the plug 13, so that the power switch 14 is turned on and off.
The rectified current by the rectifier circuit 23 regardless of the off state is indicated by an arrow B.
The storage battery 22 flows in the direction, and is charged. At this time,
A rectified current flows through the motor 21.
Since the current is about 0 mA, the motor 21 does not rotate. Incidentally, the driving current for rotating the motor 21 is 300 to 600 mA.

As described above, since the number of the lead wires 31 to 33 for connecting the motor 21 and the storage battery 22 may be three, the number of the lead wires 31 to 33 is small, and the work of soldering for connecting the lead wires 31 to 33 is not required. As a result, the work efficiency can be increased and the cost can be reduced.

Incidentally, the winding resistance of the motor 21 is 0.4.
Ω, the loss due to the winding resistance of the motor 21 during charging is 0.4Ω × (100 mA) ² = 0.004 W
The work of charging the storage battery 22 is 1.2 × 100 mA = 0.12 W when the voltage of the storage battery 22 is 1.2 V.
It is. Therefore, the loss rate (0.004W / 0.12
W) is about 3.3% and can be almost ignored.

The rectifier circuit 23 includes a low-frequency transformer 2
When a high frequency inverter such as a ringing choke converter is used instead of 4, the high frequency noise is reduced because the winding of the motor 21 functions as a current smoothing function during charging.

Although the above embodiment has been described with respect to an electric razor, it is needless to say that the present invention can be applied to, for example, an electric toothbrush or the like. In the above embodiment, the charge switch 28 is used, but may be omitted if the power switch 14 is not turned on during charging.

[0022]

As described above, according to the present invention, the motor and the storage battery are connected in series between the positive and negative output terminals provided on the circuit board by a lead wire, and the power switch is connected to the both terminals. Since it is connected between the output terminals, the number of lead wires for connecting the motor and the storage battery can be reduced, resulting in less soldering work for connecting the lead wires, increasing work efficiency and reducing costs. Reduction can be achieved.

[Brief description of the drawings]

FIG. 1 is an external perspective view showing an electric razor as an electric device according to the present invention.

FIG. 2 is a circuit diagram showing an electric system of the electric razor.

FIG. 3 is a circuit diagram showing an electric system of a conventional electric razor.

[Explanation of symbols]

 14 Power switch 20 Circuit board 21 Motor 22 Storage battery 23 Rectifier circuit 26,27 Output terminal 31-33 Lead wire

Claims (1)

(57) [Scope of request for utility model registration] 1. A rectifier circuit for rectifying an AC power supply, a positive terminal and a negative output terminal of the rectifier circuit are provided on a circuit board, and a storage battery charged by the rectifier circuit and a motor driven by the storage battery And an electric device comprising a power switch for turning on and off the motor, wherein the motor and the storage battery are connected in series by a lead wire between both the positive and negative output terminals provided on the circuit board, An electric device wherein the power switch is connected between the two output terminals.