| 摘要 |
PURPOSE:To prevent the generation of vibration noises by making many convex poritions on at least either one of the mask frame and the internal magnetic shield to provide gaps between their faces opposite to each other and by setting the fixing points on these concave portions or in their neighborhood. CONSTITUTION:On a square-shaped mask frame 9, each concave portion 12 is provided on the center of each of the four sides of a face 11 opposite to an internal magnetic shield 10, and each concave portion 12 has a small hole 13 on its top area. On a face 14 (opposite to the face 11) of the internal magnetic shield 10 placed on the top areas of the concave portions 12, small holes are formed. By fitting a clip pin 8 into the holes 15, 13 as the fixing points, the internal magnetic shield 10 is put together with the frame 9 as one body. In this way, even when the internal magnetic shield 10 should vibrate, it will not directly contact the mask frame 9, causing no vibration noises. |
