| 摘要 |
A surveillance device includes a front cover, at least two guide rods, a lens module, a mounting plate, a first balance spring, a circuit board, and a number of second balance springs. The guide rods are mounted in the front cover. The lens module is received the first through hole. The mounting plate is slidably mounted to the guide rods. The mounting plate defines a through hole. The first balance spring is positioned between the front cover and the mounting plate. The circuit board is mounted to the mounting plate and opposite to the first balance spring. The image sensor is mounted on the circuit board and faces the through and the lens module. The second balance springs are positioned between the mounting plate and the circuit board. The first balance spring and the second balance springs keep the image sensor being aligned with the lens module. |
