Implement quick coupler latch mechanism

A quick coupler has a frame with a hook, and an operator movable control bar. The hook has a recess for receiving a hitch pin. A latch mechanism includes a latch, a one-piece trigger, a spring, and a stop fixed to the coupler frame. The latch is pivotally coupled to the frame and moves to open and closed positions permitting and preventing the hitch pin to move into and out of the hook recess. The trigger is pivotally coupled only to the latch and to the control bar. The trigger engages the hitch pin and moves the latch to the open position. When the hitch pin is in the hook recess, the stop engages the trigger and prevents the latch from moving to its open position. A central portion of the trigger is pivotally coupled to a central portion of the latch. A shoulder surface is formed in a lower end of the latch, and a tab projects from an end of the trigger. The tab engages the shoulder surface to limit pivoting of the latch to its open position when the trigger engages the stop. A latch spring is mounted on the latch and engages the frame and urges the latch to its closed position.