| 摘要 |
<p>The screw driver has a grip (10) with a chamber for an adjusting device (30). A shaft (20) has a top section (21) with aperture (22) for a screw driver head, and a lower section (23) extending through the adjusting device. The device has a casing (31) with upper and lower toothed gears (32,33), spring (34), pressure element (35), adjusting wheel (36), and connection part (37). The wheel has an adjusting knob (364), to turn the wheel, press the pressure element against the spring to increase meshing force of the gears, and increase turning force of the screw driver.</p> |
