Film-type electrostatic capacitance sensor for detecting seat occupancy
First Claim
Patent Images
1. A film-type electrostatic capacitance sensor for detecting occupancy of a seat mounted in a vehicle, the sensor comprising:
- a planar mat buried in one of a seat face portion and a back rest portion of the seat, the planar mat extending along the one, the planar mat having a resin film extending along the one, and at least two electrodes provided individually on different sides of the resin film, the planar mat including an electrically insulating electrode protecting portion covering at least an exposed portion of each of the at least two electrodes; and
a detector circuit portion for detecting a change in an electrical state of the planar mat between the at least two electrodes based on whether the seat is occupied, wherein;
the two electrodes are provided individually on substantially both sides of the resin film; and
the electrode protecting portion provided on at least one of the sides of the resin film includes a resin coating layer.
1 Assignment
0 Petitions
Accused Products
Abstract
A film-type electrostatic capacitance sensor is provided for detecting seat occupancy and for reducing discomfort to a seat occupant and which is easy to produce. The mat of the film-type electrostatic capacitance sensor can be located in a seat portion of a vehicle seat and can include electrodes formed on both sides of a resin film and of a resin coating layer covering the electrodes. The coating layer can be a flexible resin to decrease discomfort for an occupant.
-
Citations
16 Claims
-
1. A film-type electrostatic capacitance sensor for detecting occupancy of a seat mounted in a vehicle, the sensor comprising:
-
a planar mat buried in one of a seat face portion and a back rest portion of the seat, the planar mat extending along the one, the planar mat having a resin film extending along the one, and at least two electrodes provided individually on different sides of the resin film, the planar mat including an electrically insulating electrode protecting portion covering at least an exposed portion of each of the at least two electrodes; and a detector circuit portion for detecting a change in an electrical state of the planar mat between the at least two electrodes based on whether the seat is occupied, wherein; the two electrodes are provided individually on substantially both sides of the resin film; and the electrode protecting portion provided on at least one of the sides of the resin film includes a resin coating layer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 13)
-
-
8. A film-type electrostatic capacitance sensor for detecting occupancy of a seat mounted in a vehicle, the sensor comprising:
-
a planar mat buried in one of a seat face portion and a back rest portion of the seat, the planar mat extending along the one, the planar mat having two resin films in stacked relation and extending along the one, the planar mat including at least two electrodes provided individually on different sides of the two resin films, and an electrically insulating electrode protecting portion covering at least an exposed portion of each of the at least two electrodes; and a detector circuit portion for detecting a change in an electrical state of the planar mat between the at least two electrodes based on whether the seat is occupied, wherein; the at least two electrodes are provided individually on respective surfaces of the two resin films provided in stacked relation, one of the two electrodes is disposed between the two resin films, and the electrode protecting portion covering the other of the two electrodes can include a resin coating layer. - View Dependent Claims (9)
-
-
10. A film-type electrostatic capacitance sensor capable of detecting seat occupancy by an occupant of a seat mounted in a vehicle, the sensor reducing a discomfort of the occupant, the sensor comprising:
-
a planar mat buried in a portion of the seat capable of being in contact with the occupant, the planar mat extending along a plane associated with the portion, the planar mat including a resin film and two electrodes provided on different sides of the resin film, and an electrically insulating electrode protecting portion covering at least an exposed portion of each of the two electrodes; and a detector circuit portion for detecting an electrical change between the two electrodes based on whether the seat is occupied, wherein the electrode protecting portion provided on at least one of the sides of the resin film includes a flexible resin coating layer having a flexibility so as to reduce the discomfort of the occupant. - View Dependent Claims (11, 12, 14, 15, 16)
-
Specification