radar equipment

Abstract

A radar device (100) used in a moving body is provided with a sensor substrate (40) and a sensor housing (20). The sensor substrate (40) emits radio waves for detecting a target around the moving body. The sensor housing (20) partitions a housing chamber (22) that houses the sensor substrate (40). Furthermore, in the sensor housing (20), a breathing hole (27) for reducing the air pressure difference between the housing chamber (22) and the housing outside (OS) is formed. A drainage rib (70) is erected on the rear back surface (21a) of the sensor housing (20) so as to surround the periphery of the breathing hole (27) and is formed having a shape that is open to the lower side (Si) of the breathing hole (27). The drainage rib (70) guides drainage from the breathing hole (27).

Claims

1. A radar device used in a moving vehicle, An antenna unit (40) that emits radio waves for detecting targets around the moving object, The antenna housing (20) comprises a housing chamber (22) for housing the antenna section, and a breathing hole (27) formed therein to reduce the pressure difference between the housing chamber and the outside (OS), On the outer surface (21a) of the antenna housing in the horizontal (Su) and vertical directions, drainage ribs (70) are formed to guide drainage from the breathing hole, which are erected to surround the breathing hole and open below (Si) the breathing hole. The antenna housing has a housing recess (80) formed by recessing the outer surface, The outer opening (27a) of the breathing hole and the drainage rib are provided on the bottom wall (81) of the housing recess. Between the peripheral wall (85) of the recess in the housing and the outer wall surface (77) of the drainage rib, a drainage groove is formed for draining liquid downward (Si). A radar device that makes the distance between the peripheral wall of the recess and the outer wall surface narrower than the area above the breathing hole (Ue) in the horizontal direction of the breathing hole, thereby reducing the cross-sectional area of ​​the drainage channel in the horizontal direction of the breathing hole to be smaller than the area above the breathing hole.

2. The radar device according to claim 1, wherein the drainage rib protrudes from the housing recess with respect to the reference surface portion (21c) of the outer surface, excluding the portion where the housing recess is formed.

3. The radar device according to claim 1, wherein the bottom wall is provided with drainage ribs having an extended portion (71) located above the breathing hole, and lateral portions (73) extending downward from both ends of the extended portion.

4. The radar device according to claim 1, wherein at least a portion of the bottom wall forms an inclined surface (82) that slopes downward so as the housing recess becomes shallower.

5. The bottom wall is provided with a drainage rib having an extended portion (71) located above the breathing hole, and lateral portions (73) extending downward from both ends of the extended portion, The radar device according to claim 1, wherein the portion of the bottom wall located below the outer opening is formed by an inclined surface (82) that slopes downward so as the housing recess becomes shallower.

6. The antenna housing has a plurality of breathing holes formed therein. The radar device according to claim 1, wherein the drainage ribs are erected so as to surround the plurality of breathing holes and are shaped to open below the plurality of breathing holes.

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