Mitsuba Electric Manufacturing Co., Ltd.

Tachi-s Co., Ltd.

Gensaku Yamakami

Akira Nemoto

Takao Sakamoto

Shigeru Nakahara

A multi-driving assembly of a vehicle power seat for adjusting forward and backward movement and height of the front and rear portions of the seat. At a left side of the motor shaft of an electric motor (central portion of a vehicle) where no wide space is secured, a first tightening member having no clutch is screwed to a first rotating screw shaft, which is provided with a first clutch to adjust forward and backward movement of the seat. At a right side (door side), second tightening members each having a second clutch provided therein are screwed to a second rotating screw shaft to adjust the height of the front and rear portions of the seat.

Multi-driving assembly of vehicle power seat

A driving apparatus which is capable of adjusting the forward and backward position and the height of a seat section by using a single motor to reduce the weight of the apparatus and simplify the structure. Nut members are mounted on operating threaded shafts which are rotated in normal or reverse by an electric motor so that the operating threaded shafts go through the nut members. A nut body constituting each nut member is structured so as to be engaged with one of first and second clutch members by a clutch operating member. In the first shift condition where the nut body is engaged with the first clutch body, power is turned on and the nut member moves back and forth relative to the operating threaded shaft. In the second shift condition where the nut is engaged with the second clutch body, power is turned off to hinder the movement of the nut member. The system of the apparatus is arranged so that the first nut members adjust the forward and backward position of the seat section and the second nut member adjusts the heights of the seat at the front and rear ends.

Power seat driving apparatus for a vehicle

A seat moving apparatus performs adjustments of a seat portion in a longitudinal direction of the vehicle as well as height or tilting adjustments using only one electric motor to decrease the number of elements of the apparatus and to reduce the weight and size of the apparatus. A linkage for driving a seat for a vehicle is disclosed which is arranged in such a manner that first and second nut members are matably attached to operational shafts connected to the single motor. The first nut members are fixed to a floor of the vehicle. The second nut members are attached to the seat through linkages. A clutch body of each nut member can be, by a clutch operation mechanism, selectively switched between a movement state and a non-movement state. In the movement state, a clutch body of the clutch mechanism is positioned at a second shifting position and the nut members are engaged with and longitudinal moved along the threaded operation shafts. In the non-movement state, the clutch body is positioned in a first shifting position and the nut members are not moved during rotation of the operational shafts. The first nut members adjust the positions of the seat in the longitudinal direction and the second nut members adjust the height or tilt of the seat.

Growing community of inventors

Niisatomura, Japan

Gensaku Yamakami