Electricity: motive power systems – Positional servo systems – Limit or end-stop control
Patent
1987-10-06
1989-12-12
Shoop, Jr., William M.
Electricity: motive power systems
Positional servo systems
Limit or end-stop control
318103, 318466, G05G 500
Patent
active
048870170
ABSTRACT:
A seat angle regulating apparatus comprises: an upper arm mounted to a seat back of a seat; a lower arm mounted to a seat cushion of the seat; an internal gear and an external gear; an angle regulating unit having an eccentric shaft; a motor for rotating the eccentric shaft; and a locking unit for engaging and disengaging the angle regulating unit to and from either of said upper arm or said lower arm. The best feature of the present invention is that the angle regulating unit has a motor rotation control unit for controlling the forward and backward rotation range of the motor and enabling the rotation of the motor within a predetermined rotation range. The motor rotation control unit comprises: two components relatively moved by the motor; a first switch for detecting the relative position located at one end of rotation range of the two components; a second switch for detecting the other relative position located at the other end of rotation range of the same; and a motor controller for turning the motor on and off in accordance with the input from the first and second switch. Thus the seat angle regulating apparatus can recline the seat back within the predetermined range appropriately, and avoid damaged or worn out terminals and terminal plate used in the conventional seat regulating apparatus, malfunction due to contact failure or short circuit between the terminals and the terminal plate, and failure of seat back locking for the full-forward-reclining position.
REFERENCES:
patent: 4355270 (1982-10-01), Cook et al.
patent: 4451887 (1984-05-01), Harada et al.
patent: 4698571 (1987-10-01), Mizuta et al.
patent: 4728873 (1988-03-01), Inoue et al.
Aisin Seiki Kabushiki Kaisha
Martin David
Shoop Jr. William M.
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