| 摘要 |
The connector or bushing fits into a "knock-out" hole in the wall of a junction box or the like in order to protect the cable or wires from contact with the box and to provide "strain relief", that is, to hold the cable or wire securely to prevent its conductors from being pulled loose from the electrical terminals to which they are connected. The connector has a first body member or "yoke" and a second body member or "wedge", both of which are formed in a single molding operation and are attached to one another temporarily. The yoke is fitted into the knock-out hole but only partially fills the hole. The cable is inserted through a hole in the yoke. The wedge slides in slots in the yoke and is shaped and positioned so that pressure applied to it by means of a screwdriver will cause it to break loose from the yoke, slide in the slots, and become wedged between the cable and one edge of the hole. This structure serves the dual function of holding the connector solidly in place in the wall of the box, while also providing strain relief for the cable. The connector is relatively small and inexpensive to make, and it is relatively easy to use. It can be removed and re-used, if desired. The assembly of the parts of the connector, the clamping of the cable, and the seating of the connector in the hole all are completed with a single stroke of a screwdriver, without moving the cable longitudinally.
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