| 摘要 |
The unit comprises a display device (3) housed in a push-button casing (4, 5) movably housed in a base casing (1). The display device (3) has a luminous display area (21) on a support plate (22) asymmetric thereto. The push-button casing is asymmetric relative to a viewing window (23) thereof, through which the luminous display area (21) is visible. The base casing (1) has a side opening (15a) to accommodate the push-button casing without the latter protruding laterally. The base casing (1) has a frame (2) attached having a bevel (16) formed around an opening (14) aligned with the viewing window (23). The bevel (16) has regular width around the entire opening (14) and protrudes laterally a regular distance from all sides of the base casing (1).
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