Electric power tool powered by battery pack and adapter therefor

摘要

An adapter for an electric power tool couples battery packs with the electric power tool. The adapter is provided with a voltage regulator circuit interposed between the battery packs and the electric power tool. The voltage regulator circuit regulates a supply voltage from the battery packs to the electric power tool to a level corresponding to a rated voltage of the electric power tool. The voltage regulator is capable of raising the supply voltage higher than nominal voltages of the battery packs.

主权项

1. An adapter for coupling at least one battery pack with an electric power tool, the adapter comprising:
a battery-side unit configured to attach the at least one battery pack and be electrically connected to the at least one battery pack that is attached; at least two tool-side units configured to attach the electric power tool and be electrically connected to the attached electric power tool; and a voltage regulator circuit configured to be interposed between the at least one battery pack attached to the battery-side unit and the electric power tool attached to the tool-side unit, and regulate a supply voltage from the at least one battery pack to the electric power tool to a level corresponding to a rated voltage of the electric power tool, wherein: the at least two tool-side units include a first tool-side unit and a second tool-side unit; the first tool-side unit and the second tool-side unit are configured to be alternatively attachable to the battery-side unit; the first tool-side unit is configured to be attachable to an electric power tool having a first rated voltage and not to be attachable to an electric power tool having a second rated voltage; the second tool-side unit is configured to be attachable to the electric power tool having the second rated voltage and not to be attachable to the electric power tool having the first rated voltage; and the voltage regulator circuit is configured to regulate the supply power to a level being substantially equal to the first rated voltage when the battery-side unit is attached to the first tool-side unit, and regulate the supply power to a level being substantially equal to the second rated voltage when the battery-side unit is attached to the second tool-side unit; each tool-side unit is provided with storing means configured to store data by which an identification can be made from the other tool-side unit; and the voltage regulator circuit is configured to read the data from the storing means of the tool-side unit to identify the tool-side unit attached to the battery-side unit.