Vehicle seat
AssigneeTachi-S Co., Ltd.
InventorsMasakazu Takeda, Keita Myochin, Naoki Toda
Life of this patent
Estimating the term…
Abstract
Provided is a vehicle seat having a pitching function, which not only has an assist function for bringing a main frame to a seated position or a forward tilted position, but also prevents the increase in the width and the increase in the weight of the seat. The vehicle seat includes: a base frame; a main frame disposed on the base frame and having a back frame and a cushion frame; and a link mechanism that allows the main frame to swing to the seated position and the forward tilted position with respect to the base frame. A third rotating shaft of the link mechanism is provided with a torsion spring that urges the main frame to swing from the forward tilted position to the seated position.
Claims7
A vehicle seat, comprising:
- a base frame;
- a main frame disposed on the base frame and having a back frame and a cushion frame;
- a link mechanism that allows the main frame to swing to a seated position and a forward tilted position with respect to the base frame;
- and
- a spring that urges the main frame to swing from the forward tilted position to the seated position or from the seated position to the forward tilted position,
- wherein:
- the base frame has a first frame extending in a front-rear direction,
- the link mechanism has the cushion frame, the first frame, and a front link,
- a rear portion of the cushion frame and a rear portion of the first frame are connected to each other via a first rotating shaft,
- a front portion of the cushion frame and a first end portion of the front link are connected to each other via a second rotating shaft,
- a front portion of the first frame and a second end portion of the front link are connected to each other via a third rotating shaft,
- the cushion frame is provided with a long hole that corresponds to and allows either the first rotating shaft or the second rotating shaft to swing, and
- the spring is provided on at least the third rotating shaft, or the first or second rotating shaft which the long hole does not allow to swing.
A vehicle seat, comprising:
- a base frame;
- a main frame disposed on the base frame and having a back frame and a cushion frame;
- a link mechanism that allows the main frame to swing to a seated position and a forward tilted position with respect to the base frame;
- and
- a spring that urges the main frame to swing from the forward tilted position to the seated position or from the seated position to the forward tilted position,
- wherein
- the base frame has a first frame extending in a front-rear direction,
- the link mechanism has the cushion frame, the first frame, and a front link,
- a rear portion of the cushion frame and a rear portion of the first frame are connected to each other via a first rotating shaft,
- a front portion of the cushion frame and a first end portion of the front link are connected to each other via a second rotating shaft,
- a front portion of the first frame and a second end portion of the front link are connected to each other via a third rotating shaft, and
- the cushion frame is provided with a long hole that allows either the first rotating shaft or the second rotating shaft to swing.
Dependencies are inferred from the claim text.