Hand-held electrical combination hammer drill

A hand-held electrical combination hammer drill capable of being used both as a drilling hammer and as a chisel hammer, comprising a housing having a handle (2);

• an actuation member (17) for actuating an electrical on-off switch of the hammer drill and located on the handle (2);
• switching means (3, 4) for switching between drilling and chiseling operations;
• stop means (5-22) actuated by the switching means (3, 4) for retaining the actuation member (17) in a on-position of the on-off switch upon selection of the chiseling operation;
• and a stop switch (15) having, upon selection of the chiseling operation, a first position in which the stop switch provides for securing the actuation member (17) in the on-position thereof with the stop means (5-22), and a second position in which the stop means occupies a non-operative position in which the actuation member, upon being released, automatically moves into the off-position thereof under an action of a biasing force,
• wherein the stop means comprises a slide (9), and a switch rod (5) displaceable in a longitudinal direction of the hammer drill by the switching means (3, 4) for displacing the slide (9) in the longitudinal direction of the hammer drill by the switching means (3, 4), and wherein the slide (9) is provided, at a side thereof opposite the switch rod (5), with a stop member (21) which upon displacement of the stop switch (15) into the “chiseling operation” position thereof, extends into a displacement path of a stop lug (22) provided on the actuation member (17), preventing return of the actuation member (17) in the off-position thereof.