Device for vehicle seat
First Claim
1. A device for a vehicle seat that includes a seat cushion and a seat back that turns around a part in the vicinity of a rear end of the seat cushion so as to be changeable between a predetermined raised state and a forwardly folded state where it is inclined and folded toward the seat cushion or it is laid over the seat cushion and that is arranged adjacently to and on a vehicle front side of a luggage compartment, comprising:
- a forwardly biasing member configured to apply a force to turn the seat back in a direction in which the seat back changes to the forwardly folded state;
an engaging device including a first engaging member provided at the seat back and a second engaging member provided at the seat cushion or a vehicle and being engageable with and releasable from the first engaging member, the engaging device being in a first state in which the first engaging member engages the second engaging member to retain a raised posture of the seat back when the seat back is raised from the forwardly folded state to the predetermined raised state, the engaging device being in a second state in which the engagement of the first engaging member with the second engaging member is released so that the seat back changes to the forwardly folded state by the force of the forwardly biasing member when the seat back is to be folded forwardly;
an electric motor configured to turn the seat back around the part in the vicinity of the rear end of the seat cushion; and
a drive circuit configured to activate the electric motor,wherein the drive circuit includes;
a manipulation switch that is arranged at a predetermined part of a vehicle apart from the vehicle seat, and that activates, when manipulated to be in an ON state, the electric motor so that the seat back is raised from the forwardly folded state; and
a compulsory cutting mechanism cutting, when the seat back is raised from the forwardly folded state to the predetermined raised state by manipulation of turning the manipulation switch to the ON state, electric conduction by the drive circuit to the electric motor so that the seat back is stopped in the predetermined raised state,wherein the compulsory cutting mechanism includes an interlocking switch that works with operation of the engaging device, andwherein the interlocking switch is in an ON state, for allowing the electric conduction by the drive circuit to the electric motor, when the engaging device is in the second state, thereby causing the seat back to be the forwardly folded state, and is an OFF state, for cutting electric conduction by the drive circuit to the electric motor, when the seat back is raised from the forwardly folded state to the predetermined raised state and the engaging device is in the first state.
1 Assignment
0 Petitions
Accused Products
Abstract
When a seat back in a forwardly folded state is raised to a predetermined raised state by activating an electric motor by turning on a switch, the electric motor is immediately stopped even if the switch is still turned on, and the seat back is retained in the raised state. There are provided a locking member which operates to retain the seat back in the raised state when the seat back is in the predetermined raised state and a lever which turns in association with the operation of the locking member. The lever turns on another switch to open a drive circuit for the electric motor.
53 Citations
19 Claims
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1. A device for a vehicle seat that includes a seat cushion and a seat back that turns around a part in the vicinity of a rear end of the seat cushion so as to be changeable between a predetermined raised state and a forwardly folded state where it is inclined and folded toward the seat cushion or it is laid over the seat cushion and that is arranged adjacently to and on a vehicle front side of a luggage compartment, comprising:
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a forwardly biasing member configured to apply a force to turn the seat back in a direction in which the seat back changes to the forwardly folded state; an engaging device including a first engaging member provided at the seat back and a second engaging member provided at the seat cushion or a vehicle and being engageable with and releasable from the first engaging member, the engaging device being in a first state in which the first engaging member engages the second engaging member to retain a raised posture of the seat back when the seat back is raised from the forwardly folded state to the predetermined raised state, the engaging device being in a second state in which the engagement of the first engaging member with the second engaging member is released so that the seat back changes to the forwardly folded state by the force of the forwardly biasing member when the seat back is to be folded forwardly; an electric motor configured to turn the seat back around the part in the vicinity of the rear end of the seat cushion; and a drive circuit configured to activate the electric motor, wherein the drive circuit includes; a manipulation switch that is arranged at a predetermined part of a vehicle apart from the vehicle seat, and that activates, when manipulated to be in an ON state, the electric motor so that the seat back is raised from the forwardly folded state; and a compulsory cutting mechanism cutting, when the seat back is raised from the forwardly folded state to the predetermined raised state by manipulation of turning the manipulation switch to the ON state, electric conduction by the drive circuit to the electric motor so that the seat back is stopped in the predetermined raised state, wherein the compulsory cutting mechanism includes an interlocking switch that works with operation of the engaging device, and wherein the interlocking switch is in an ON state, for allowing the electric conduction by the drive circuit to the electric motor, when the engaging device is in the second state, thereby causing the seat back to be the forwardly folded state, and is an OFF state, for cutting electric conduction by the drive circuit to the electric motor, when the seat back is raised from the forwardly folded state to the predetermined raised state and the engaging device is in the first state. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A device for a vehicle seat that includes a seat cushion and a seat back that turns around a part in the vicinity of a rear end of the seat cushion so as to be changeable among a predetermined raised state, a forwardly folded state in which the seat back is inclined and folded toward the seat cushion or is laid over the seat cushion, and a backwardly reclined state in which the seat back is reclined or falls further backward than the predetermined raised state, and that is arranged adjacently to and on a vehicle front side of a luggage compartment, comprising:
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a biasing member configured to apply a force to turn the seat back in a direction in which the seat back changes to the forwardly folded state; a retention mechanism configured to retain the seat back in the predetermined raised state; a manipulation member that releases the seat back retained by the retention mechanism for allowing the seat back to be in the forwardly folded state by the force of the biasing member; an electric motor provided at one of members of the seat cushion or the vehicle as a member and the seat back as a member for turning and raising the seat back with the part in the vicinity of the rear end of the seat cushion as the center by transmitting torque to the other member; a drive gear provided at the one member and rotated by an output shaft of the electric motor; a driven gear provided rotatably and coaxially with a turning center of the seat back and meshing with the drive gear; a clutch provided at the other member for inhibiting relative rotation of the driven gear with respect to the other member so that the seat back is raised by rotation of the drive gear by the electric motor; a transmission releasing mechanism inhibiting transmission of counter torque from the seat back to the electric motor when the seat back is folded to be in the forwardly folded state by releasing the driven gear from the rotation inhibition of the clutch; and a drive circuit configured to activate the electric motor, wherein the drive circuit includes; a momentary type manipulation switch that is arranged at a predetermined part of a vehicle apart from the vehicle seat, which is set in an OFF state normally, and that activates, when manipulated to be in an ON state, the electric motor so that the seat back is raised from the forwardly folded state; and a compulsory cutting mechanism cutting, when the seat back is raised to the predetermined raised state by manipulation of turning the manipulation switch to the ON state, electric conduction by the drive circuit to the electric motor so that the seat back is stopped in the predetermined raised state regardless of whether the manipulation of turning the manipulation switch to the ON state is continued, and wherein the clutch includes an engaging gear that rotates integrally with the driven gear, a hooking member that engages with the engaging gear, and a biasing member applying a force in a direction in which the hooking member engages with the engaging gear, and a plurality of engaging teeth, for engaging the hooking member so as to allow the hooking member to inhibit the relative rotation of the driven gear, are formed in the engaging gear in a peripheral direction of the engaging gear at a pitch larger than a forwardly foldable angle range of the seat back from an angle at the predetermined raised state to an angle at the forwardly folded state in which it is inclined and folded toward the seat cushion. - View Dependent Claims (19)
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Specification