Fore-and-aft suspension device for automotive seat
First Claim
1. A fore-and-aft suspension device for an automotive seat, in which said seat includes a seat lower base frame, said fore-and-aft suspension device comprising:
- support means fixed on the side of a floor of an automobile, said support means being arranged so as to extend along a longitudinal direction of said seat lower base frame, and supports said seat lower base frame, said support means comprising a pair of guide rails of a channel shape in section having opened portions extending longitudinally thereof, disposed such that the respective opened portions thereof face toward each other, one of said guide rails being disposed at one side of said seat lower base frame and the other of said guide rails being disposed at the other of said seat lower base frame;
movable means provided at said seat lower base frame, said movable means being adapted to permit forward-and-backward movement of said seat lower base frame along said support means, said movable means comprising at least two pairs of rollers, wherein one pair of said rollers is rotatably provided at one side of said seat lower base frame and the other pair of said rollers is rotatably provided at the other side of said seat lower base frame so that said at least two pairs of rollers are respectively disposed within said pair of guide rails in a rollable manner;
at least one shaft provided at said seat lower base frame, such that said shaft extends between said seat lower base frame and said support means;
at least one pair of coil springs wound around said at least one shaft; and
at least one spring abutment member provided at said support means, in an opposite relation with said at least one shaft, such that said at least one spring abutment member extends towards said at least one shaft, spacing apart the coil springs of said at least one pair of coil springs from each other, so that the coil springs are at their respective ends abutted against said at least one spring abutment member,wherein said at least one shaft with said at least one pair of coil springs wound therearound comprises two shafts provided at both sides of said seat lower base frame and two pairs of coils springs wound around a respective shaft, and wherein said at least one spring abutment member comprises one spring abutment member provided in each of said pair of guide rails, and said at least one shaft, around which said at least one pair of coil springs are wound, is disposed within respective ones of said guide rails,whereby, when a forward and backward load or jolting is applied to said seat, said seat lower base frame is moved along said support means, and each of said coil springs is compressed at said spring abutment member, giving a repercussive force against said forward and backward load or jolting, thereby absorbing same.
1 Assignment
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Accused Products
Abstract
A fore-and-aft suspension device for an automotive seat, in which the seat lower base frame of said seat is movable forwardly and backwardly along a guide rail, and a shaft extends between the seat lower base frame and guide rail, with a pair of coil springs being wound around the shaft. A spring abutment member is also provided between the seat lower base frame and guide rail, such that those coil springs are at their respective ends abutted against both sides of the spring abutment member. Thus, a forward and backward load or jolting applied to the seat is smoothly transmitted, via such seat lower base frame, to the the coil springs, which are then compressed at the spring abutment member, absorbing the forward and backward load or jolting.
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Citations
5 Claims
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1. A fore-and-aft suspension device for an automotive seat, in which said seat includes a seat lower base frame, said fore-and-aft suspension device comprising:
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support means fixed on the side of a floor of an automobile, said support means being arranged so as to extend along a longitudinal direction of said seat lower base frame, and supports said seat lower base frame, said support means comprising a pair of guide rails of a channel shape in section having opened portions extending longitudinally thereof, disposed such that the respective opened portions thereof face toward each other, one of said guide rails being disposed at one side of said seat lower base frame and the other of said guide rails being disposed at the other of said seat lower base frame; movable means provided at said seat lower base frame, said movable means being adapted to permit forward-and-backward movement of said seat lower base frame along said support means, said movable means comprising at least two pairs of rollers, wherein one pair of said rollers is rotatably provided at one side of said seat lower base frame and the other pair of said rollers is rotatably provided at the other side of said seat lower base frame so that said at least two pairs of rollers are respectively disposed within said pair of guide rails in a rollable manner; at least one shaft provided at said seat lower base frame, such that said shaft extends between said seat lower base frame and said support means; at least one pair of coil springs wound around said at least one shaft; and at least one spring abutment member provided at said support means, in an opposite relation with said at least one shaft, such that said at least one spring abutment member extends towards said at least one shaft, spacing apart the coil springs of said at least one pair of coil springs from each other, so that the coil springs are at their respective ends abutted against said at least one spring abutment member, wherein said at least one shaft with said at least one pair of coil springs wound therearound comprises two shafts provided at both sides of said seat lower base frame and two pairs of coils springs wound around a respective shaft, and wherein said at least one spring abutment member comprises one spring abutment member provided in each of said pair of guide rails, and said at least one shaft, around which said at least one pair of coil springs are wound, is disposed within respective ones of said guide rails, whereby, when a forward and backward load or jolting is applied to said seat, said seat lower base frame is moved along said support means, and each of said coil springs is compressed at said spring abutment member, giving a repercussive force against said forward and backward load or jolting, thereby absorbing same. - View Dependent Claims (2, 3, 4, 5)
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Specification