An infrared sensing mechanism with optical interference suppression and anti-fogging functions

Abstract

An infrared sensing mechanism with optical interference suppression and anti-fogging functions includes a sensor body, an infrared light shield, a plastic structural layer, and a tempered glass window. The sensor body has a transmitter and a receiver. The infrared light shield has a transmitter port, a receiver port, and a partition portion. The partition portion separates the transmitter port and the receiver port. The infrared light shield covers the sensor body and embeds the transmitter and the receiver into the transmitter port and the receiver port, respectively. The plastic structural layer covers the infrared light shield and is fixed to the sensor body, and has a transmitter slot and a receiver slot facing the transmitter port and the receiver port, respectively. The tempered glass window has a transmitter glass piece and a receiver glass piece correspondingly fixed to the transmitter slot and the receiver slot, respectively.

Claims

1. An infrared sensing mechanism with optical interference suppression and anti-fogging functions, comprising: A sensor body having a transmitter and a receiver; an infrared light shield having a transmitter port, a receiver port, and a partition separating the transmitter port and the receiver port, the infrared light shield covering the sensor body and embedding the transmitter and the receiver port into the transmitter port and the receiver port respectively; a plastic structural layer covering the infrared light shield and fixed to the sensor body to fix the relative position of the infrared light shield and the sensor body, and the plastic structural layer having a transmitter slot and a receiver slot on its outer surface facing the transmitter port and the receiver port respectively; and a tempered glass window having a transmitter glass piece and a receiver glass piece correspondingly fixed to the transmitter slot and the receiver slot.

2. The infrared sensing mechanism as claimed in claim 1, wherein the plastic structural layer is made of polystyrene.

3. The infrared sensing mechanism as described in claim 1, wherein the infrared light shield, the plastic structural layer, and the reinforced glass window are fixed together in an airtight fit.

4. The infrared sensing mechanism as claimed in claim 1, wherein the sensor body has a first protruding wall and the infrared light shield has a first groove, the first protruding wall correspondingly engaging with the first groove.

5. The infrared sensing mechanism as claimed in claim 1, wherein the infrared light shield has a second groove, and the plastic structural layer has a second flange that corresponds to snaps into the second groove.

6. The infrared sensing mechanism as claimed in claim 5, wherein the plastic structural layer has a slot extending into the interior of the second flange.

7. The infrared sensing mechanism as claimed in claim 1, wherein the emitting glass and the receiving glass cover the emitting port and the receiving port respectively and extend outwards and around the periphery respectively.

8. The infrared sensing mechanism as claimed in claim 1, wherein the two sides of the plastic structural layer each have a side wing, the two side wings clamping the sensor body.

9. The infrared sensing mechanism as claimed in claim 8, wherein each of the two side wings has a locking groove, and the sensor body has two lock holes corresponding to the two locking grooves.

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