| 摘要 |
PURPOSE:To eliminate need for a lamp cover by constituting a signal diffusion section by right/left faces diffusing the ray of a signal output section in the right/left spreading direction and a refracting face consecutive to the right/left face and refracting the ray in the front face direction. CONSTITUTION:A transducing element 9 is mounted to a board 7 horizontally, a reflection diffusion plate 10 consists of faces E-G, they have an angle respectively in three-dimension from the transducing position P and an infrared ray is reflected and diffused to the entire room. The faces E, G act like reflecting the ray of the element 9 horizontally and the face F acts like reflecting the ray in the front face direction mainly. Moreover, an installing jig 12 and the reflection diffusion plate 10 are fixed by welding. Then the infrared ray from the element 9 is diffused by the signal diffusion section 10 to the entire room and no lamp cover is required. |
