Anti-submarining seat-belt assembly

An anti-submarining seat-belt assembly for a seat having a seat cushion, comprising

• a seat belt, comprising first and second shoulder belt portions (1.1, 1.2), a lap belt portion (1.3) and an extending belt portion (1.4);
• a main buckle assembly (9.1), having a master release button (84) and attached to a stiff first transport-system member, which is a floor of the transport system adjacent to a first seat-side or a seat-cushion frame at the first seat-side or a mid-tunnel of a motor vehicle adjacent to the first seat-side;
• a lower belt deflector (17), deflecting and loosely guiding the lap belt portion (1.3) or the first shoulder belt portion (1.1) and attached to a stiff second transport-system member, which is the floor of the transport system adjacent to a second seat-side or the seat-cushion frame at the second seat-side or a post section of the motor vehicle adjacent to the second seat-side or a side rail of the motor vehicle adjacent to the second seat-side;
• at least three latch plates (2, 9, 11, 25), the first of which is a main latch plate (9), moveable along the lap- or shoulder belt portion, the second of which is an anti-submarining latch plate (11, 25), moveable along the lap belt portion, and the third of which is a shoulder latch plate (2), fastened to a first belt end (ER) of the first shoulder belt portion (1.1);
• and
• anti-submarining buckle assemblies, attached to a seat frame of the seat, which is the seat-cushion frame or a seat-backrest frame;
• whereby
• a lower part of the body (96) of the passenger is restrained by the lap belt portion (1.3), when the main latch plate (9) is plug-in connected to the main buckle assembly (9.1);
• an upper part of the body (95) is restrained by extending the first and second shoulder belt portions (1.1, 1.2) crosswise in an X-shape, when the shoulder latch plate (2) is plug-in connected to an upper buckle assembly (4, 4b, 14, 14a, 18, 18a, 18b, 18.1 to 18.3), arranged to a seat backrest at the first seat-side;
• and
• the lap belt portion (1.3) is subdivided into two anti-submarining belt portions (1.3R, 1.3L) to restrain thighs of the passenger when the anti-submarining latch plate is plug-in connected to one of the anti-submarining buckle assemblies.

An anti-submarining seat-belt assembly for a seat having a seat cushion, comprising

• a seat belt, comprising first and second shoulder belt portions (1.1, 1.2), a lap belt portion (1.3) and an extending belt portion (1.4);
• a main buckle assembly (9.1), having a master release button (84) and attached to a stiff first transport-system member, which is a floor of the transport system adjacent to a first seat-side or a seat-cushion frame at the first seat-side or a mid-tunnel of a motor vehicle adjacent to the first seat-side;
• a lower belt deflector (17), deflecting and loosely guiding the lap belt portion (1.3) or the first shoulder belt portion (1.1) and attached to a stiff second transport-system member, which is the floor of the transport system adjacent to a second seat-side or the seat-cushion frame at the second seat-side or a post section of the motor vehicle adjacent to the second seat-side or a side rail of the motor vehicle adjacent to the second seat-side;
• at least three latch plates (2, 9, 11, 25), the first of which is a main latch plate (9), moveable along the lap- or shoulder belt portion, the second of which is an anti-submarining latch plate (11, 25), moveable along the lap belt portion, and the third of which is a shoulder latch plate (2), fastened to a first belt end (ER) of the first shoulder belt portion (1.1) and a belt-feeding device (20, 20d), attached to a seat backrest;
• and
• anti-submarining buckle assemblies, attached to a seat frame of the seat, which is the seat-cushion frame or a seat-backrest frame;
• whereby
• a lower part of the body (96) of the passenger is restrained by the lap belt portion (1.3), when the main latch plate (9) is plug-in connected to the main buckle assembly (9.1);
• an upper part of the body (95) is restrained by extending the first and second shoulder belt portions (1.1, 1.2) crosswise in an X-shape, when the belt-feeding device (20, 20d) together with the first shoulder belt portion (1.1) and the shoulder latch plate (2) moves from a resting position at the second seat-side to an operative position at the first seat-side until the shoulder latch plate (2) is plug-in connected to an upper buckle assembly (4), located on a top edge of the seat backrest at the first seat-side;
• and
• the lap belt portion (1.3) is subdivided into two anti-submarining belt portions (1.3R, 1.3L) to restrain thighs of the passenger when the anti-submarining latch plate is plug-in connected to one of the anti-submarining buckle assemblies.