Vehicle seat with cushion plate

A vehicle seat comprising:

• a seat back frame having right and left side frames;
• a headrest forwardly movably mounted to the seat back frame;
• a rear-end collision detector mounted to the seat back frame, wherein the rear-end collision detector detects rearward movement of the seat occupant and moves rearward;
• and the rear-end collision detector is operatively connected to the headrest such that the rearward movement of the rear-end collision detector forwardly moves the headrest to support a head of a seat occupant;
• a respective support shaft mounted to each side frame;
• a link member mounted to the support shaft;
• and
• a biasing member that biases the link member;
• wherein:
• a lower portion of the link member is connected to the rear-end collision detector;
• each of the side frames is provided with a front projecting wall inwardly projecting and integrally formed at a front end of the respective side frame, and a rear projecting wall inwardly projecting and integrally formed at a rear end of the respective side frame;
• each of the side frames comprises a lateral face, the lateral face comprising a concave portion that is indented or concave in a direction towards the other side frame;
• the support shaft is mounted at a same height as the concave portion;
• and
• the concave portion is disposed between the front projecting wall and the rear projecting wall.

A vehicle seat comprising:

• a seat back frame having right and left side frames;
• a headrest forwardly movably mounted to the seat back frame;
• a rear-end collision detector mounted to the seat back frame, wherein the rear-end collision detector detects rearward movement of the seat occupant and moves rearward;
• and the rear-end collision detector is operatively connected to the headrest such that the rearward movement of the rear-end collision detector forwardly moves the headrest to support a head of a seat occupant;
• a respective support shaft mounted to each side frame;
• a link member mounted to the support shaft;
• a biasing member that biases the link member;
• a flexible plate member disposed in front of the rear-end collision detector;
• a seat back cushion provided in front of the flexible plate member;
• and
• a pressure adjusting mechanism for pushing the seat back cushion to a front direction by forwardly protruding the flexible plate member that results from the flexible plate member being bent;
• wherein:
• a lower portion of the link member is connected to the rear-end collision detector;
• each of the side frames is provided with a front projecting wall inwardly projecting and integrally formed at a front end of the respective side frame, and a rear projecting wall inwardly projecting and integrally formed at a rear end of the respective side frame;
• each of the side frames comprises a lateral face, the lateral face comprising a concave portion that is indented or concave in a direction towards the other side frame;
• the support shaft is mounted at a same height as the concave portion;
• the concave portion extends above and below the support shaft;
• and
• an upper end of the flexible plate member is disposed above a central axis point of the support shaft.

A vehicle seat comprising:

• a seat back frame having right and left side frames;
• a headrest forwardly movably mounted to the seat back frame;
• a rear-end collision detector mounted to the seat back frame, wherein the rear-end collision detector detects rearward movement of the seat occupant and moves rearward;
• and the rear-end collision detector is operatively connected to the headrest such that the rearward movement of the rear-end collision detector forwardly moves the headrest to support a head of a seat occupant;
• a respective support shaft mounted to each side frame;
• a link member mounted to the support shaft;
• a biasing member that biases the link member;
• a flexible plate member disposed in front of the rear-end collision detector;
• a seat back cushion provided in front of the flexible plate member;
• a pressure adjusting mechanism for pushing the seat back cushion to a front direction by forwardly protruding the flexible plate member that results from the flexible plate member being bent;
• and
• a wire member that supports the flexible plate member;
• wherein:
• a lower end portion of the link member is connected to the rear-end collision detector;
• each of the side frames is provided with a front projecting wall inwardly projecting and integrally formed at a front end of the respective side frame, and a rear projecting wall inwardly projecting and integrally formed at a rear end of the respective side frame;
• each of the side frames comprises a lateral face, the lateral face comprising a concave portion that is indented or concave in a direction towards the other side frame;
• the support shaft is mounted at a same height as the concave portion;
• the concave portion is disposed between the front projecting wall and the rear projecting wall and extends above an upper end portion of the link member and below the lower end portion of the link member;
• an upper end of the flexible plate member is disposed above a central axis point of the support shaft;
• the wire member is connected to a lower portion of the seat back frame;
• a connecting plate that is connected to and located between respective lower portions of the side frames, the connecting plate comprising a projecting curve portion that projects forward;
• and
• the projecting curve portion is larger than the rear-end collision detector in length in a seat right-to-left direction.