| 主权项 |
1. A frame, the frame comprising:
at least one bow; a first member having a first and second end and a opening, the first end being connected to the at least one bow; a second member having an upper end and lower end; a bushing received in the upper end of the second member and having a plurality of grooves along an inner wall, the second end of the first member being slidably received in the bushing; a housing with at least one window adjacent the opening; at least one pawl at least partially within the housing and pivotally connected to the housing by a pin; a spring around the pin and engaged with the at least one pawl such that the at least one pawl is urged out of the opening and the window and into engagement with the plurality of grooves; a carriage slidably received in the housing; a shaft extending through a slot in the at least one pawl, the shaft secured to the carriage; a lever pivotally connected to the first member; and a cable secured to the lever at one end and to the carriage at a second end such that operation of the lever causes the carriage to move upwards and the at least one pawl to rotate away from the plurality of grooves. |
