Vehicle seat weight measuring device
AssigneeTakata Corporation
InventorsHiroshi Aoki, Shuji Kusaka
Life of this patent
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Abstract
A device is provided for measuring the weight of a vehicle seat and the weight of a person sitting on the vehicle seat. The device is equipped with a load sensor for converting at least a part of the seat weight to an electric signal, and a deviation/deflection absorbing mechanism which has a pin bracket and a pin and is provided between the seat and the load sensor. The deviation amount that can be absorbed by this absorbing mechanism is a fixed value.
Claims10
A seat weight measuring device for measuring the weight of a vehicle seat including the weight of a person sitting on it, comprising:
- a load sensor adapted to convert at least a part of the seat weight to an electric signal;
- and
- an absorption mechanism for absorbing at least one of deviation and deflection between the seat and a vehicle body,
- wherein the absorption mechanism is slidable by LIR at the maximum from side to side, and
- wherein
- LIR=(a+bδ)×γ/(α+γ)+(cδ/2)×γ/(β+γ)
- where
- a:
- dimensional tolerance (mm) of the center with respect to the fore-and-aft direction of right and left seat rails when securing the seat rails to the vehicle body;
- b:
- maximum stroke (mm) that seat slides are capable of sliding;
- c:
- distance between fixed points (load sensor center positions) in front of and behind the seat rails;
- δ:
- sine value (sin θ) of the tolerance θ of the relative angle deviation of the right and left seat rails when securing the seat rails to the vehicle body;
- α:
- deflection amount (mm/kgf) per unit load when causing a lateral deformation (opening and closing) between the right and left seat slides;
- β:
- deflection amount (mm/kgf) per unit load when twisting the right and left seat slides laterally and reversely in the longitudinal direction;
- and
- γ:
- slide amount (mm/kgf) per unit load when sliding the absorption mechanism.
A seat weight measuring device for measuring the weight of a vehicle seat including the weight of a person sitting on it, comprising:
- a load sensor adapted to convert at least a part of the seat weight to an electric signal;
- and
- an absorption mechanism for absorbing at least one of deviation and deflection between the seat and a vehicle body, wherein the absorption mechanism includes a pin passing through a hole and connecting the vehicle seat to the vehicle body, and
- wherein the hole is sized to provide a first clearance about the pin to thereby allow at least one of vertical and longitudinal deviation between the vehicle seat and the vehicle body.
A method of measuring the weight of a vehicle seat including a portion of the weight of a person sitting on it, comprising the steps of:
- converting at least a portion of the vehicle seat weight to an electric signal;
- and
- absorbing at least one of deviation and deflection between the vehicle seat and a vehicle body by an absorption mechanism slidable in a direction LIR,
- wherein
- LIR=(a+bδ)×γ/(α+γ)+(cδ/2)×γ/(β+γ)
- and where
- a:
- dimensional tolerance (mm) of the center with respect to the fore-and-aft direction of right and left seat rails when securing the seat rails to the vehicle body;
- b:
- maximum stroke (mm) that seat slides are capable of sliding;
- c:
- distance between fixed points (load sensor center positions) in front of and behind the seat rails;
- δ:
- sine value (sin θ) of the tolerance θ of the relative angle deviation of the right and left seat rails when securing the seat rails to the vehicle body;
- α:
- deflection amount (mm/kgf) per unit load when causing a lateral deformation (opening and closing) between the right and left seat slides;
- β:
- deflection amount (mm/kgf) per unit load when twisting the right and left seat slides laterally and reversely in the longitudinal direction;
- and
- γ:
- slide amount (mm/kgf) per unit load when sliding the absorption mechanism.
A method of measuring the weight of a vehicle seat including a portion of the weight of a person sitting on it, comprising the steps of:
- converting at least a portion of the vehicle seat weight to an electric signal;
- and
- absorbing at least one of deviation and deflection between the vehicle seat and a vehicle body by an absorption mechanism which includes a pin passing through a hole and connecting the vehicle seat to the vehicle body;
- and wherein the hole is sized to provide a clearance about the pin to thereby allow at least one of vertical and longitudinal deviation between the vehicle seat and the vehicle body.
Dependencies are inferred from the claim text.