Patent ID: 11904744
Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
Field: Transport (Mechanical engineering)
Classification: CPC B | IPC B

Claim 7:
8. A vehicle-mounted seat device, comprising:
a seat back main frame standing in a vehicle cabin;
a back rest which is configured to support the back of a seated person;
a seat back sub frame mounted to the back rest and capable of swinging together with the back rest with respect to the seat back main frame;
a seat back middle frame fixed to the seat back main frame, a guide slit formed in a seat back middle frame and elongated in an up-down direction, wherein the back rest is suspended and held by the upper wire from the seat back middle frame so as to be able to swing with respect to the seat back middle frame, and wherein the back rest and the seat back sub frame are mounted to the seat back main frame through the seat back middle frame;
a rear restraint bracket fixed to the seat back sub frame;
a front restraint bracket disposed in front of, and opposite to, the rear restraint bracket;
a connection bush fixed to the front restraint bracket and having a penetration hole formed at a center thereof, a connection pin inserted through the penetration hole of the connection bush and the guide slit, and having an end connected to the seat back sub frame, wherein the connection pin is elevated or lowered together with the seat back sub frame to cause the front restraint bracket to be elevated or lowered;
a restraint component placed between the rear restraint bracket and the front restraint bracket, and provided as a linear member for defining a position of the seat back sub frame in a front-back direction with respect to the seat back middle frame, wherein the front restraint bracket is mounted to the seat back middle frame so as to be elevated or lowered together with the seat back sub frame;
a relay disc fixed at a center of the back rest in a width direction;
a first engagement member fixed with respect to the seat back main frame at a position higher than the relay disc;
an upper wire provided between the relay disc and the first engagement member for suspending and holding the back rest so as to be able to swing with respect to the seat back main frame with the relay disc being the center; and
a height adjustment mechanism constructed to be capable of pulling in part of the upper wire for changing a disposed height of the back rest with respect to the seat back main frame by changing an amount by which the upper wire is pulled in.