Seat adjusting device
AssigneeTachi-S Co., Ltd.
InventorAkira Nemoto
Life of this patent
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Abstract
A seat adjusting device for adjusting the seat position in the forward and backward directions by means of an externally provided motor. The device comprises an upper rail and a lower rail, both of them being slidably fitted together, a lead male screw rotatably supported within the space between the upper and lower rails, a female screw block which is also provided within that space and threadedly engaged with the lead male screw, and a drive mechanism disposed at the end of the upper lower rails in a manner exposed externally away from such space between those two rails. The seat adjusting device is, therefore, capable of small-sized formation and of being assembled with much ease without failure.
Claims11
A seat adjusting device, comprising:
- a lower rail fixed to a floor;
- an upper rail slidably fitted to said lower rail such that said upper fail is slidingly movable along a longitudinal direction of said lower rail, said upper rail being fixed with a seat;
- a lead male screw disposed in a space defined between said lower and upper rails, extending therein in a longitudinal direction of said two rails, said lead male screw being rotatably supported at one of said lower and upper rails;
- a female screw block fixedly provided at the other of said lower and upper rails;
- said lead male screw being partially in a threaded engagement with said female screw block;
- a drive mechanism for causing rotation of said lead male screw, said drive mechanism being connected with said lead male screw with such an arrangement that it is disposed externally of said space between said lower and upper rails and fixed at said one of said lower and upper rails where said lead male screw is rotatably supported;
- and
- at least a pair of rollers within said space between said lower and upper rails, such that they are disposed symmetrically in relation to an axial direction of said lead male screw for supporting said lead male screw from both sides.
Dependencies are inferred from the claim text.