Abstract: A reclining angle adjustment device includes a brake mechanism mounted on a control handle shaft for transmitting angular movement of a control handle to an angularly movable shaft, a stopper arm rotatably mounted on the angularly movable shaft and angularly movable by a driven member of a transmission mechanism, and stoppers for limiting angular movement of the stopper arm to determine a range of fine reclining angle adjustment.

Abstract: A reclining angle adjustment device for use with a reclining seat includes an intermediate gear plate having an outer gear, a first arm having an inner gear meshing with the outer gear, an angularly movable shaft having concentric and eccentric portions on which the intermediate gear plate and the first arm are angularly movably mounted, respectively, a second arm supporting the angularly movable shaft thereon, a release lever for unlocking the intermediate gear plate from the second arm for rough adjustment of a reclining angle, a control handle for turning the angularly movable shaft for fine adjustment of the reclining angle, a pin secured to the second arm by a pin bracket and having a groove, a spiral spring having an inner and engaging in the groove for imposing a turning force produced at an outer end thereof on the intermediate gear plate, and a hook plate angularly movably mounted on the pin for transmitting the turning force of the spiral spring to the intermediate gear plate through the hook plate,

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.