Adapter for a Power Tool Battery Pack

An adapter-battery pack assembly comprising an adapter and a battery pack,

• wherein the adapter comprises:
• an insertion part protruding in a first direction and insertable into a body of a power tool, the insertion part having a plurality of terminals for electrically connecting with the power tool;
• a pair of rails that guides a battery pack to move in a second direction substantially orthogonal to the first direction for mounting the battery pack;
• an operating part for attaching the adapter to and detaching the adapter from the body of the power tool;
• and
• a receiving part for attaching the adapter to and detaching the adapter from the battery pack,
• wherein the battery pack comprises:
• a battery case accommodating a battery;
• a pair of rail grooves formed in the battery case for inserting the pair of rails;
• and
• a battery-side operating part engageable with the receiving part,
• wherein the operating part of the adapter and the receiving part are disposed in different positions when viewing the adapter in the first direction of the insertion part.

A power tool comprising:

• a motor;
• a battery pack serving as a power source for the motor;
• an accommodating section that opens outward;
• an electric connector disposed adjacent the accommodating section;
• and
• an adapter that supplies power from the battery pack to the motor, the adapter comprising:
• an insertion part that is inserted into the accommodating section and has a plurality of terminals for electrically connecting with the power tool;
• a pair of rails that guides insertion of the battery pack in a direction substantially orthogonal to the insertion direction of the insertion part;
• an operating part that attaches the insertion part in and detaching the insertion part from the accommodating section;
• and a receiving part for attaching to and detaching from the battery pack,
• wherein the operating part and the receiving side are disposed in different positions when viewing the adapter in the insertion direction of the insertion part.