Disposable watch has no setting mechanism to reduce production costs, instead having an external device for setting the time in the factory or at point of sale, and which is also able to switch the battery power supply on or off

摘要

Disposable watch has a housing (1) sealed in the factory, a battery (6), a timer (5) and a display either analogue (4a) or digital. Setting of the watch is undertaken using an external device (8a), either in the factory or at the point of sale. The external device can, for example, use electromagnetic waves and can also be used to open or close a switch (7a) connecting the battery to the battery.