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US 5,857,750 AGranted
Seat device
AssigneesNHK Spring Co., Ltd., Nissan Motor Co., Ltd.
InventorsTakayoshi Kashiwamura, Akira Homma, Nozomu Munemura, Toshimichi Hanai, Kazuhito Kato, Kozo Yamaura
Life of this patent
Estimating the term…
Abstract
A seat device comprises a cushion frame mounted on a floor; a support member for supporting a seat pad; and torsion bars for elastically supporting the support member on the cushion frame, including a torque bar section and an arm section, wherein the torsion bars are provided at the front and rear positions of the seat or at the left and right positions thereof by at least one pair, and each arm section of the at least one pair of torsion bars be provided so as to form a parallel link mechanism.
Claims10
The seat device comprising:
- a cushion frame;
- a support member for supporting a seat pad;
- and
- a first pair of torsion bars for elastically supporting said support member on said cushion frame and each including a torque bar section and an arm section, one end of the arm section being operatively connected with the support member, and one end of the torque bar section being rigidly and immovably connected to said cushion frame so that rotational movement of the arm section in response to relative movement of said support member toward said cushion frame torques said torque bar section about its longitudinal axis in a manner which produces a resistance to the relative movement of said support member toward said cushion member,
- wherein respective arm sections of said first pair of torsion bars are oriented in essentially the same direction so as to be essentially parallel with each other and to form a parallel link mechanism, and
- further comprising another pair of torsion bars, wherein the pairs of torsion bars are arranged at opposite sides of said cushion frame and wherein the torque bar section of each pair of torsion bars is arranged with a slight offset with respect to other.
3 more elements
The seat device comprising:
- a cushion frame;
- a support member for supporting a seat pad;
- and
- a first pair of torsion bars for elastically supporting said support member on said cushion frame and each including a torque bar section and an arm section, one end of the arm section being operatively connected with the support member, and one end of the torque bar section being rigidly and immovably connected to said cushion frame so that rotational movement of the arm section in response to relative movement of said support member toward said cushion frame torques said torque bar section about its longitudinal axis in a manner which produces a resistance to the relative movement of said support member toward said cushion member,
- wherein respective arm sections of said first pair of torsion bars are oriented in essentially the same direction so as to be essentially parallel with each other and to form a parallel link mechanism, and further comprising:
- a second pair of torsion bars;
- and
- a connecting member for connecting the arm sections of the first pair of torsion bars, said connecting member being disposed on one of the opposite sides of the cushion frame to induce a substantially synchronous movement therebetween.
5 more elements
A seat device comprising:
- a cushion frame;
- a support member for supporting a seat pad;
- and
- a pair of torsion bars for elastically supporting said support member on said cushion frame,
- said torsion bars each having a torque bar section and an arm section, the torque bar section having an end which is rigidly secured to one of said cushion frame and said support member, the torque bar section being twisted about its longitudinal axis when the arm section, which is connected to the other of the cushion frame and said support member, is displaced by relative movement of said support member toward said cushion frame;
- arm supporting brackets pivotally receiving free ends of the arm sections of said torsion bars;
- and
- rigidity reducing means for reducing a rigidity of a connection between said arm support brackets and the one of said cushion frame and said support member in a direction which extends essentially along a line which passes through both ends of said arm section of a corresponding torsion bar.
5 more elements
Dependencies are inferred from the claim text.