Lens driving device

A lens driving device, comprising:

• a lens assembly;
• and
• a driving module for driving the lens assembly to move;
• wherein the driving module comprises a first driving module and a second driving module;
• the lens assembly is accommodated in the first driving module;
• the second driving module is sleeved on one side of the first driving module away from the lens assembly;
• wherein the first driving module comprises a first driving assembly;
• the first driving assembly drives the lens assembly to translate along an optical axis, a first axis perpendicular to the optical axis, and a second axis perpendicular to the optical axis;
• wherein the second driving module comprises a first outer frame, a second outer frame, a bracket assembly, and a second driving assembly;
• the first outer frame is sleeved on an outer side of the first driving module and is fixedly connected with the first driving module;
• the second outer frame is sleeved on an outer side of the first outer frame;
• the second outer frame and the first outer frame are spaced apart;
• wherein the first outer frame can rotate along a third axis relative to the bracket assembly and is connected to the bracket assembly;
• so the first outer frame rotates around the third axis with respect to the second outer frame;
• the bracket assembly can rotate along a fourth axis relative to the second outer frame and is connected to the second outer frame;
• the first outer frame is suspended in the second outer frame so the bracket assembly and the first outer frame can rotate together around the fourth axis with respect to the second outer frame;
• the third axis and the fourth axis are perpendicular to the optical axis;
• the second driving assembly drives the first driving module to rotate around the third axis and the fourth axis with respect to the second outer frame;
• wherein the first driving module further comprises a base, a support frame, a housing, and an elastic sheet assembly;
• the support frame comprises an accommodating space;
• the support frame is supported on the base;
• the housing is covered on the base, so the support frame is disposed in the housing;
• the elastic sheet assembly elastically supports the lens assembly in the accommodating space;
• wherein the first driving assembly comprises a first driving coil assembly disposed on the base, a first magnet assembly, a first Hall sensor, and second driving coils;
• the first magnet assembly comprises first magnets disposed on the support frame;
• the first driving coil assembly comprises first driving coils disposed on the base;
• the first driving coils cooperate with the first magnets for driving the support frame to translate along the first axis and the second axis;
• the first Hall sensor is fixed on the base for detecting a displacement of the lens assembly;
• wherein the second driving coils are disposed on the lens assembly;
• the second driving coils cooperate with the first magnet assembly for driving the lens assembly to translate along the optical axis.