Walk-in seat locking device for vehicle

A device comprising:

• a rear link comprising a first sector gear, the rear link having a first end portion hinge-fastened to a rear portion of a seat cushion frame and a second end portion hinge-fastened to a rear portion of a seat rail;
• a locking link comprising a second sector gear engageable with the first sector gear, wherein the second sector gear is on a rear portion of the locking link and is hinge-fastened to the seat cushion frame;
• a lever having a first end portion to which a cable is connected and a second end portion hinge-fastened to the seat cushion frame;
• a first locking cam having a first end portion coaxially connected to the lever, wherein a first locking end is on a second end portion of the first locking cam to restrain the locking link, and wherein the first locking cam comprises a pin on the first locking end;
• and
• a second locking cam having a first end portion coaxially connected to the lever and the first locking cam, wherein a second locking end is on a second end portion of the second locking cam to restrain the locking link, wherein the second locking cam comprises a slot in the second locking end, the slot being configured to receive the pin, wherein the pin on the first locking end of the first locking cam and the slot in the second locking end of the second locking cam are configured to restrain pivoting of the first locking cam in an unlocking direction, and
• wherein, in a state in which the first locking cam is pivoted in the unlocking direction by an external force, the pin on the first locking end of the first locking cam is configured to move from a bottom of the slot in the second locking end of the second locking cam to be caught at a top of the slot.

A vehicle comprising:

• a vehicle body comprising a floor panel;
• a seat disposed in an interior of the vehicle, the seat comprising a seat cushion frame and a seat cushion;
• a seat rail comprising a fixed rail mounted on the floor panel and a movable rail fastened to the fixed rail, wherein the fixed rail is configured to adjust a position of the seat in a forward-backward direction;
• and
• a locking device for the seat, the locking device comprising:
• a rear link comprising a first sector gear, the rear link having a first end portion hinge-fastened to a rear portion of the seat cushion frame and a second end portion hinge-fastened to a rear portion of the seat rail;
• a locking link comprising a second sector gear engageable with the first sector gear, wherein the second sector gear is on a rear portion of the locking link and is hinge-fastened to the seat cushion frame;
• a lever having a first end portion to which a cable is connected and a second end portion hinge-fastened to the seat cushion frame;
• a first locking cam having a first end portion coaxially connected to the lever, wherein a first locking end is on a second end portion of the first locking cam to restrain the locking link;
• and
• a second locking cam having a first end portion coaxially connected to the lever and the first locking cam, wherein a second locking end is on a second end portion of the second locking cam to restrain the locking link,
• wherein, in a state in which the first locking cam is pivoted in an unlocking direction by an external force, the second locking end of the second locking cam is configured to stay in continuous contact with a locking lug on an outer surface of the locking link to prevent the locking link from being unlocked.