Lens moving back clearance eliminating device

A lens moving back clearance eliminating device comprises a base, a transmission mechanism and a lens. The transmission mechanism is arranged on the base and comprises a first element, a second element and an elastic piece. The second element is mechanically connected to the first element. The elastic piece is arranged between the first element and the second element or abuts against the first element. The lens is mechanically connected with the transmission mechanism. The lens can move along a first direction relative to the base. Therefore, the back clearance error between the first element and the second element can be eliminated or absorbed. 一种镜头移动背隙消除装置，包括一基座、一传动机构以及一镜头。传动机构设置于基座，包括一第一元件、一第二元件以及一弹性件。第二元件与第一元件以机械式连接。弹性件设置于第一元件与第二元件之间，或抵靠于第一元件。镜头与传动机构以机械式连接。镜头可相对于基座沿一第一方向位移。借此，可消除或吸收第一元件与第二元件之间之间的背隙误差。