| 摘要 |
PROBLEM TO BE SOLVED: To provide an inexpensive welding current switching device which has no control device but has a similar function to that of a conventional welding current switching device with a complicated structure having an argon resistor. SOLUTION: Two sets of batteries (1) arranged in series are prepared, one set is grounded (2) and the other is connected to a holder (3). A break of a relay (4) is connected to one of the batteries (1) arranged in series, a coil of the relay (4) is fitted to a switch (5) of the holder (3), and two kinds of the current are used in a different manner by the operation of the switch (5) of the holder (3).
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