Patent ID: 11940534
Assignee: RICOH COMPANY, LTD.
Field: Measurement (Instruments)
Classification: CPC G  A | IPC A  G

Claim 8:
9. A detection unit, comprising:
a detection device;
a first light source provided in the detection device and configured to emit a first light in a first direction;
a second light source provided in the detection device and configured to emit a second light in a second direction different from the first direction;
a light receiver provided in the detection device and configured to receive one of a first reflected light of the first light and a second reflected light of the second light;
a black shielding plate to surround a light source substrate including the first light source, the second light source, and the light receiver;
an outer housing provided in the detection device and configured to surround the black shielding plate;
a transparent member provided in the detection device and configured to pass the first light and the second light to outside of the outer housing;
an outer housing provided in the detection device and including a first window at a position corresponding to the transparent member;
a detection box;
a second window disposed in the detection box at a position facing the first window;
an opening provided in the detection box and configured to allow an object to enter the detection box; and
a lid provided in the detection box and configured to detect that the object enters the detection box and to close the opening.