VEHICLE SEAT
First Claim
1. A seat to be mounted in a vehicle, comprising:
- a seat cushion frame including a first frame member and a second frame member;
a drive pinion rotatably supported in said first frame member of said seat cushion frame, said drive pinion being operatively connected with a drive source provided with the seat;
a first link element having;
an upper portion pivotally connected with said first frame member of said seat cushion frame; and
a lower portion pivotally connected with a floor of said vehicle, wherein said upper portion has, defined therein, a sector gear portion which is in meshed engagement with said drive pinion;
said first link element including a hole and a gear portion;
a second link element having;
an upper portion pivotally connected with said second frame member of said seat cushion frame; and
a lower portion pivotally connected with said floor of said vehicle;
said second link element including a hole and a gear portion;
a connecting axis element rotatably extended between said first and second frame members of said seat cushion frame;
said first and second link elements being coupled together by said connecting axis element for synchronized movement;
a reinforcing transmission shaft having one end portion and another end portion, said reinforcing transmission shaft extending in a parallel relation with said connecting axis element, such that said end portion thereof extends through said hole of said first link element and is rotatably connected with said first frame member of said seat cushion frame, whereas said another end portion thereof extends through said hole of said second link element and is rotatably connected with said second frame member of said seat cushion frame;
a first pinion fixed to said one end portion of said reinforcing transmission shaft, said first pinion being in meshed engagement with said gear portion of said first link element; and
a second pinion fixed to said another end portion of said reinforcing transmission shaft, said second pinion being in meshed engagement with said gear portion of said second link element.
1 Assignment
0 Petitions
Accused Products
Abstract
A vehicle seat, including two links movable for adjustment in height of the seat, is provided with a reinforcing transmission shaft. The reinforcing transmission shaft is rotatably connected between two frame members of seat cushion frame in the seat, while extending through the two links. Further, two pinions are fixed on the respective two end portions of the reinforcing transmission shaft and respectively meshed with two gear portions defined in the respective two links. With such arrangement, in the case of rear-end collision, most of great load applied to the links is transmitted, via the reinforcing transmission shaft, pinions and gear portions, to each of the two frame members, thereby preventing deformation of one of the two links to avoid lowering of the seat or inclination of one side of the seat as found in a rear-end collision case.
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Citations
5 Claims
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1. A seat to be mounted in a vehicle, comprising:
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a seat cushion frame including a first frame member and a second frame member; a drive pinion rotatably supported in said first frame member of said seat cushion frame, said drive pinion being operatively connected with a drive source provided with the seat; a first link element having;
an upper portion pivotally connected with said first frame member of said seat cushion frame; and
a lower portion pivotally connected with a floor of said vehicle, wherein said upper portion has, defined therein, a sector gear portion which is in meshed engagement with said drive pinion;said first link element including a hole and a gear portion; a second link element having;
an upper portion pivotally connected with said second frame member of said seat cushion frame; and
a lower portion pivotally connected with said floor of said vehicle;said second link element including a hole and a gear portion; a connecting axis element rotatably extended between said first and second frame members of said seat cushion frame; said first and second link elements being coupled together by said connecting axis element for synchronized movement; a reinforcing transmission shaft having one end portion and another end portion, said reinforcing transmission shaft extending in a parallel relation with said connecting axis element, such that said end portion thereof extends through said hole of said first link element and is rotatably connected with said first frame member of said seat cushion frame, whereas said another end portion thereof extends through said hole of said second link element and is rotatably connected with said second frame member of said seat cushion frame; a first pinion fixed to said one end portion of said reinforcing transmission shaft, said first pinion being in meshed engagement with said gear portion of said first link element; and a second pinion fixed to said another end portion of said reinforcing transmission shaft, said second pinion being in meshed engagement with said gear portion of said second link element. - View Dependent Claims (2, 3, 4, 5)
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Specification