Abstract: A parking brake mechanism for operating a parking brake cable includes an operating lever pivotally connected with a mounting bracket for movement between brake-applied and brake-released positions, a locking device for releasably locking the lever in the brake-applied position, and a self-adjust device for automatically removing slack from the parking brake cable when the lever is in the brake-released position, characterized in that at least one of the locking and self-adjust devices includes a spring clutch having an internal clutch spring member.