| 摘要 |
The invention discloses a portable transmitter, wherein a button-type battery and a circuit substrate equipped with an antenna are accommodated inside a housing in a cascading manner. The housing comprises a first housing component with a bottom surface and a side surface and a second housing component covering the opening part of the first housing component. The side surface of the first housing component is equipped with a circle so as to enable the button-type battery and the circuit substrate to project outwardly at the central portion in the cascading direction. The joint part (J) of the external surfaces of the first housing component and the second housing component is arranged to be at a diameter (L1) smaller than the maximum diameter (L0) of the side surface of the first housing component. |
