| 摘要 |
<p>The hand held chain saw includes a safety device with a swinging arm (30) located on the side of the operating handle away from the operator, i.e. nearer the saw blade, which in the event of a dangerous jerking movement, swings forwards so that a pawl (63) located near the base, above the pivot point is released by a leaf spring (60) enabling it to swing round its pivot (50) under the force of a spring (46) mounted on a spindle across the top of the housing, so that a pivot arm (42) is also swung over, tightening a band (40) around a brake drum mounted on the drive shaft so that the drive motor is stopped.</p> |
