Abstract: A reclining angle adjustment device used to obtain best inclination of a reclining seat for passengers, including a seat back arm fixed to a seat back portion, a base arm with an internal gear connected with the seat back arm through an axis, a stopper, a regulating plate, the first control lever and the second control lever. For rough adjustment, the first control lever is inclined forwardly or backwardly by a passenger on seat so as to disengage the stopper from the regulating plate. For minute adjustment, the second control lever is repeatedly moved round upwardly and downwardly so as to roll a pinion in the internal gear provided in the seat back arm.

Abstract: A reclining angle adjusting device used to obtain best angle of inclination of a reclining seat for passengers, including an external gear being activated by a compression spring, the first arm member fixed to a seat with an internal gear, the second arm member fixed to a seat back with an internal gear. Minute adjustment is performed through said external gear by way of rotation of an adjustment handle whereas rough adjustment is performed quickly by pushing said adjustment handle to disengage said external gear from said internal gear of the first arm member.