US Patent 11653721 Seat belt apparatus and buckle

A buckle has a buckle mechanism with a lock pawl and a latch pin. The latch pin is designed to travel only in a longitudinal or horizontal direction relative to the buckle mechanism. When a latch plate assembly is secured, the latch pin holds the lock pawl in a latched position and prevents accidental release of the latch plate assembly. A release button is coupled to the latch plate retention bar so that all of the effective actuation and other motions are in the longitudinal direction of the buckle mechanism. The buckle mechanism has an ejector mechanism with an ejection spring for ejecting the latch plate assembly.