Weight sensor device
First Claim
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1. A weight sensor device for detecting a weight of a occupant seated on a seat, the seat including a seat frame and a cushion, the cushion being deformed due to the weight of the occupant when the occupant is seated on said seat, said weight sensor device comprising:
- a displacement member arranged in the seat frame, said displacement member being displaced downward in the seat frame as the deformation of the cushion is caused;
a converter for converting a displacement of said displacement member into an electric signal, the converter being connected to a side portion of the displacement member, wherein said converter comprises a moving member for moving in one direction in association with a displacement of said displacement member and a variable resistor mechanically connected to said moving member, said variable resistor having a resistance value changing in accordance with the movement of said moving member; and
at least one spring member configured to produce resistance force with respect to the movement of the displacement member, the spring member being connected, independently of the connection between the converter and the displacement member, to the displacement member.
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Abstract
The present invention provides a weight sensor device for detecting a weight of an occupant seated on a seat having a seat frame and a cushion. The device has a sensing wire displaced downward in the seat frame as the cushion is deformed due to the weight of the occupant when the occupant is seated on the seat and a variable resistor for converting a displacement of the sensing wire into an electric signal indicative of the weight of the occupant.
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Citations
15 Claims
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1. A weight sensor device for detecting a weight of a occupant seated on a seat, the seat including a seat frame and a cushion, the cushion being deformed due to the weight of the occupant when the occupant is seated on said seat, said weight sensor device comprising:
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a displacement member arranged in the seat frame, said displacement member being displaced downward in the seat frame as the deformation of the cushion is caused;
a converter for converting a displacement of said displacement member into an electric signal, the converter being connected to a side portion of the displacement member, wherein said converter comprises a moving member for moving in one direction in association with a displacement of said displacement member and a variable resistor mechanically connected to said moving member, said variable resistor having a resistance value changing in accordance with the movement of said moving member; and
at least one spring member configured to produce resistance force with respect to the movement of the displacement member, the spring member being connected, independently of the connection between the converter and the displacement member, to the displacement member. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A weight sensor device for detecting a weight of a occupant seated on a seat, the seat including a seat frame and a cushion, the cushion being deformed due to the weight of the occupant when the occupant is seated on said seat, said weight sensor device comprising:
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a displacement member arranged in the seat frame, said displacement member being displaced downward in the seat frame as the deformation of the cushion is caused; and
a converter for converting a displacement of said displacement member into an electric signal, wherein said converter includes;
a moving member for moving in one direction in association with a displacement of said displacement member; and
a variable resistor mechanically connected to said moving member, said variable resistor having a resistance value changed in accordance with the movement of aid moving member, wherein said displacement member includes a sensing wire located below the cushion, said sensing wire having one end fixed to the seat frame and the other end connected to said moving member, whereby said sensing wire is deformed in accordance with deformation of the cushion, and wherein said displacement member includes first and second sensing wires intersecting with each other and a buffer member provided at an intersection of said first and second sensing wires.
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10. A weight sensor device for detecting a weight of a occupant seated on a seat, the seat including a seat frame and a cushion, the cushion being deformed due to the weight of the occupant when the occupant is seated on said seat, said weight sensor device comprising:
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a displacement member arranged in the seat frame, said displacement member being displaced downward in the seat frame as the deformation of the cushion is caused; and
a converter for converting a displacement of said displacement member into an electric signal, wherein said converter includes;
a moving member for moving in one direction in association with a displacement of said displacement member; and
a variable resistor mechanically connected to said moving member, said variable resistor having a resistance value changed in accordance with the movement of aid moving member, wherein said displacement member includes a net member located below the cushion and supported elastically with respect to the seat frame, said net member being displaced downward in accordance with deformation of the cushion. - View Dependent Claims (11, 12, 13, 14, 15)
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Specification