Patent ID: 7142413

Claim:
A portable transmitter for transmitting signals to a device to be operated, the portable transmitter having a case, electronic components and a battery for supplying power to the electronic components, the electronic components and the battery being contained in the case, the case comprising: a key space for containing a mechanical key therein; a key hook for keeping the mechanical key in position in the key space; a releasing lever for releasing the key hook to take out the mechanical key from the key space; an opening for loading and unloading the battery; a battery cover closing the opening, the battery cover being fixed to the case with screws; a seal member disposed between the battery cover and the case to be compressed therebetween to thereby seal the opening; a sliding cover covering the battery cover and the screws, the sliding cover being slidably removable from the case; and a cover hook for locking the sliding cover in its closing position, wherein: the cover hook is simultaneously released when the key hook is released by operating the releasing lever.