Power tool having interchangeable tool heads with an independent accessory switch

A power tool, comprising:

• a tool body having a housing and an electric motor mounted within the housing, the electric motor having a rotatable output shaft;
• a tool head releasably attachable via a mechanical connection and an electrical connection to the tool body;
• wherein the electrical connection is formed by a tool head electrical connector integrated with the tool head and mated with a tool body electrical connector integrated with the tool body;
• wherein the mechanical connection comprises engagement of a male cog with a female cog;
• and
• wherein the tool head comprises at least one of a drill tool head, a saw tool head and a sander tool head.

A power tool, comprising:

• a tool body having a housing and an electric motor mounted within the housing, the electric motor having a rotatable output shaft;
• a tool head releasably attachable via a mechanical connection and an electrical connection to the tool body;
• a controller disposed in the housing of the tool body;
• and
• a motor drive circuit configured to drive the electric motor, the motor drive circuit housed in the tool body;
• wherein the electrical connection is formed by a tool head electrical connector integrated with the tool head and mated with a tool body electrical connector integrated with the tool body;
• wherein the mechanical connection comprises engagement of a male cog with a female cog, the male cog including a plurality of splines;
• and
• wherein the tool head comprises at least one of a drill tool head, a saw tool head and a sander tool head.