| 摘要 |
One end of an oscillating saw blade has a notch, and spaced from the notch is a hole through the blade. The head of the tool has a slot having a shaft extending through the rear end of the slot for receiving the notch. A pin extends partially into the slot for receiving the hole. A closer in the form of a cam is cammed into and out of the slot for moving the hole on the blade onto the pin and moving the end of the blade having the hole and the notch against the bottom of the slot. The cam closer is locked in place to lock the blade in the slot. A handle is attached to the cam closer for manually rotating the cam, and the cam has an overcenter orientation where the resilient forces from the blade pushing on the cam tend to rotate the cam to a closed position. A stop is provided to intersect the handle and stop it in its locked position. A jaw of resilient material may be provided between the blade and the bottom of the slot to spread forces from the cam on the blade. The jaw is slightly curved so that camming tends to straighten the jaw, but the tendency for the jaw to resume its slightly curved orientation creates a force on the cam urging the cam to its overcenter position. The jaw also has a lip to prevent the blade from being inserted between the jaw and the cam. The jaw has an aperture through which the shaft passes, and the jaw slides along the shaft. A second aperture in the jaw mates with the pin to secure the jaw when the cam is holding the jaw against the blade. |
