Tool holding area of hammer drill and matching tool, comprising specifically arranged corresponding wider and narrower sections

摘要

The shaft (3) of the tool accommodated inside the holding area (1) has a wider section (19) at the front followed by two longitudinal curved recesses (11, 12) opposite each other serving as path for the ball-shaped locking device (5) in combination with corresponding areas (20, 21) located at the inner surface of the holding area (1) and has a smaller diameter at its rear end (18). The locking device (5) can be released by axially moving a spring (9) supported sleeve (8) which is automatically pushed back by a second spring.