| 摘要 |
The two connectors 813,14) in the base unit (3) space are positione din the first and a second halves of the space, each half having a recess (9), and at least a first part of a lock component (11). The connectors recesses and lock components are so arranged that the operating unit, without being turned, can be fitted in the base unit when it is turned in either of two directions. The operating unit has a hook fixture which engages in the recess when the unit is connected to the base unit. It also has the other part of the lock component which on connection snap-engages in the first lock part. A further contact in the operating unit is plugged on connection into the first contact (12), so that th the operating unit is connected correctly to the base unit both when the latter is horizontally fitted in one direction or in that opposite.4 |
