Passenger detecting apparatus
First Claim
1. A passenger detecting apparatus installed on a ceiling of an automobile for detecting a state of a passenger residing within a compartment of said automobile, comprising:
- light emitting means for emitting light rays in a substantially horizontal direction;
beam forming means for transforming the light rays emitted from said light emitting means into a collimated light beam or alternatively a converged light beam in a substantially horizontal direction;
downward reflecting means for reflecting said light beam in a direction toward a region covering a lower seat disposed within said compartment, wherein said downward reflecting means does not rotate;
light receiving means for receiving said light beam scattered upon striking on the passenger to thereby detect the state of said passenger; and
a substrate disposed substantially horizontally,wherein said light emitting means includesa light emitting element mounted on said substrate and so disposed as to emit a light beam substantially vertically relative to said substrate; and
an optical system for bending the direction of a light beam emitted from said light emitting element to a substantially horizontal direction.
1 Assignment
0 Petitions
Accused Products
Abstract
A passenger detecting apparatus including a sensor unit of a small size heightwise which can be manufactured inexpensively includes a light emitting means (21a, . . . , 21h) for emitting light rays in a substantially horizontal direction, a beam forming means (22a, 22b) for transforming light rays emitted from the light emitting means into a collimated or converged light beam in a substantially horizontal direction, a downward reflecting means (23a, 23b) for reflecting the light beam in a direction toward a lower seat disposed in the compartment, and a light receiving means (24a, 24b) for receiving the light beams scattered upon striking on the passenger for thereby detecting the state of the passenger.
4 Citations
4 Claims
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1. A passenger detecting apparatus installed on a ceiling of an automobile for detecting a state of a passenger residing within a compartment of said automobile, comprising:
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light emitting means for emitting light rays in a substantially horizontal direction; beam forming means for transforming the light rays emitted from said light emitting means into a collimated light beam or alternatively a converged light beam in a substantially horizontal direction; downward reflecting means for reflecting said light beam in a direction toward a region covering a lower seat disposed within said compartment, wherein said downward reflecting means does not rotate; light receiving means for receiving said light beam scattered upon striking on the passenger to thereby detect the state of said passenger; and a substrate disposed substantially horizontally, wherein said light emitting means includes a light emitting element mounted on said substrate and so disposed as to emit a light beam substantially vertically relative to said substrate; and an optical system for bending the direction of a light beam emitted from said light emitting element to a substantially horizontal direction. - View Dependent Claims (2, 3)
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4. A passenger detecting apparatus installed on a ceiling of an automobile for detecting a state of a passenger residing within a compartment of said automobile, comprising:
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light emitting means for emitting light rays in a substantially horizontal direction; beam forming means for transforming the light rays emitted from said light emitting means into a collimated light beam or a converged light beam in a substantially horizontal direction; downward reflecting means for reflecting said light beam in a direction toward a region covering a lower seat disposed within said compartment; and light receiving means for receiving said light beam scattered upon striking on the passenger to thereby detect the state of said passenger, wherein said downward reflecting means includes a diaphragm for constricting said light beam, said diaphragm being disposed on a reflective surface.
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Specification