JPH0242040Y2 - - Google Patents

Description

[Detailed explanation of the idea] [Industrial application field] The present invention relates to a rechargeable electric shaver.

[Conventional technology]

When manufacturing a rechargeable electric shaver, tests are conducted to ensure that the charging current for the rechargeable battery matches the current value specified by JIS and other standards.

In order to carry out this inspection, a conventional rechargeable electric shaver has a positive terminal of a rechargeable battery 3, which has a motor 2 for driving the inner blade connected between the two terminals via a power switch 1, as shown in FIG. Discontinuous test terminals 7 are provided in a circuit pattern connecting a step-down transformer 4 and a charging power source 6 consisting of a rectifier 5.

The circuit pattern is provided on a printed circuit board provided with a charging circuit, and the test terminal 7 is formed by making a portion of this pattern discontinuous in advance. Note that 8 in FIG. 4 is a variable resistor for current adjustment.

In this conventional structure, after testing the charging current by connecting an ammeter to the testing terminal 7, after making adjustments as necessary, a short circuit is caused to the discontinuous testing terminal 7. It is beginning to be processed.

[Problem that the invention attempts to solve]

However, in such a conventional structure, once the printed circuit board is assembled into the razor body case after the above-mentioned inspection, the charging circuit cannot be seen, so there is no way to know whether the above-mentioned inspection terminals are short-circuited. Therefore, if it is overlooked that the short-circuiting process is not performed when the printed circuit board is assembled into the main body case, the electric shaver will be shipped with a defective charging circuit.

[Means for solving problems]

The present invention provides discontinuous inspection terminals in the circuit pattern of the printed circuit board that connects the positive or negative electrode of the rechargeable battery and the charging power source, and connects the rechargeable battery with the terminal and the power switch in series. The above-mentioned conventional problems are solved by a configuration in which a motor for driving the inner blade is connected between the two poles.

[Effect]

In the present invention having the above configuration, charging radio waves can be tested by connecting an ammeter to testing terminals that are formed in advance in the circuit pattern of the charging circuit and are short-circuited after testing. After assembling the electric shaver, checking whether the testing terminals of the charging circuit are short-circuited can be done simply by closing the power switch. In other words, since the test terminal is connected in series with the motor, the motor will not be driven if it is not short-circuited, and whether the test terminal is short-circuited depending on whether or not the motor is driven. You can check whether Moreover, since the above confirmation is carried out using the power switch and motor, which are essential for an electric shaver, there is no need to provide any special parts, and the structure can be easily realized without becoming complicated.

〔Example〕

Hereinafter, one embodiment will be described with reference to FIGS. 1 to 3.

Reference numeral 11 in the figure is a printed circuit board, which is provided with a charging circuit for a rechargeable battery 12, and in this embodiment, the battery 12 is also connected to the printed circuit board 11.
It is attached to 1. The charging circuit includes, for example, a step-down transformer 13, a rectifier 14, a variable resistor 15, and a circuit pattern 16. That is, in this circuit, as shown in FIG. 1, a rectifier 14 such as a diode is connected to one end of the secondary winding of the step-down transformer 13, and a variable resistor 15 is connected to the other end of the secondary winding. In addition, a rectifier 14 and a variable resistor 15 are connected to both poles of the rechargeable battery 12, respectively. In addition, 17 in FIG. 1 is a power supply plug for charging connected to the primary winding of the step-down transformer 13. The variable resistor 15 is formed by a variable resistor pattern (not shown in FIGS. 2 and 3) provided on the printed circuit board 11, and the resistance value can be adjusted by removing a portion of this pattern with a knife or the like. I'm starting to be able to do it.

The step-down transformer 13 and the rectifier 14 constitute a charging power source 18, and this power source 17
and one of the positive electrode or negative electrode of the battery 12,
In other words, in this embodiment, the circuit pattern 16 connecting between the positive electrode and
Inspection terminals 19 are formed spaced apart from each other by about mm. The test terminals 19 are provided in advance so that the circuit pattern 16 is discontinuous. and,
This test terminal 19 is used to test the charging current of the battery 12 by connecting an ammeter (not shown) to it.
After adjusting the variable resistor 15 as necessary to meet the standards, short-circuiting is performed using conductive paint, solder, etc. (not shown).

Further, a motor 21 for driving the inner blade is connected between both electrodes of the battery 12 through the inspection terminal 19 and the power switch 20 in series. Note that 22 in FIG. 3 is a lead wire connecting the motor connection terminal of the printed circuit board 11 and the terminal of the motor 21. Further, the power switch 20 is attached to the printed circuit board 11, and 23 in FIG. 3 indicates a circuit pattern for the switch. The printed circuit board 11 and the motor 21 are built into the main body case of the electric shaver (not shown).
Further, the operating section of the switch 20 is located on the outer surface of the main body case.

When manufacturing this electric shaver, in order to test the charging current, prepare the charging circuit pattern 1 in advance.
Inspection can be performed by connecting the test terminals 19 formed at 6 with an ammeter and charging the battery. As a result, if the charging current needs to be adjusted, the variable resistor 15 may be adjusted to match the charging current to the standard.

After assembling the printed circuit board 11, motor 21, etc. into the main body case, in order to check whether the test terminal 19 of the circuit pattern 16 for the charging circuit has been short-circuited, turn on the power switch 20.
Just close it. Then, if the above-mentioned short-circuiting process is performed, the electric power of the rechargeable battery 12 is applied to the motor 21 to drive the motor 21, and if the above-mentioned short-circuiting process is not performed, the power of the rechargeable battery 12 is applied to the motor 21. On the other hand, power from the rechargeable battery 12 is not applied, and the motor 21 is not operated.

That is, depending on whether or not the motor 21 is driven, it is possible to easily and reliably confirm whether or not the test terminal 19 is short-circuited. Such confirmation can prevent the electric shaver from being shipped with a defective charging circuit.

In implementing the present invention, unless it is contrary to the gist of the invention, specific details such as the charging circuit, its charging power source, circuit pattern, printed circuit board, rechargeable battery, inspection terminal, power switch, motor, etc. Of course, the structure, shape, position, etc. can be configured and implemented in various ways without being limited to the one embodiment described above.

[Effect of idea]

According to the present invention, which has the gist of the configuration described in the above-mentioned utility model registration claims, it is possible to easily check whether the charging current inspection terminal has been short-circuited after assembly without complicating the structure. The practical effect is great.

[Brief explanation of the drawing]

1 to 3 show an embodiment of the present invention,
FIG. 1 is an electric circuit diagram, FIG. 2 is a schematic front view of a printed circuit board on which circuit components are mounted, and FIG. 3 is a schematic rear view showing the printed circuit board on which circuit components are mounted together with a motor. FIG. 4 is an electrical circuit diagram of a conventional electric shaver. 11...Printed circuit board, 12...Rechargeable battery,
18...Power supply for charging, 19...Terminal for inspection, 20
...Power switch, 21...Motor.

Claims (1)

[Claim for Utility Model Registration] Forming in advance a charging current testing terminal that makes this pattern discontinuous on a part of the circuit pattern for the charging circuit of a printed circuit board provided with a charging circuit for a rechargeable battery. In an electric shaver that short-circuits the discontinuous test terminal after testing the charging current, the discontinuous test terminal is provided in the circuit pattern connecting the positive or negative electrode of the rechargeable battery and the charging power source, and An electric shaver characterized in that a motor for driving the inner blade is connected between both poles of the rechargeable battery via the terminal and the power switch in series.