-610 in clockwise or counterclockwise directions relative to the optical axis 10-O (i.e. first moving dimension).

The magnetic element 10-610 is disposed and fixed in the recess 10-560 of the guiding element 10-500 (FIG. 4G), so the magnetic element 10-610 may drive the guiding element 10-500 to rotate together in clockwise or counterclockwise direction (i.e. the first moving dimension). Furthermore, the sensor 10-800 is disposed in the concave portion 10-250 of the bottom 10-200, and the driving substrate 10-620 is disposed on the sensor 10-800, so the minimum distance between the driving substrate 10-620 and the guiding element 10-500 may be less than the minimum distance between the sensor 10-800 and the guiding element 10-500, and the driving substrate 10-620 may protect the sensor 10-800 disposed under the driving substrate 10-620 by prevent the sensor 10-800 colliding with other elements. Furthermore, the driving assembly 10-600 is disposed in the recess 10-230 of the bottom 10-200, and the protective structure 10-220 is extended along the Z direction from the recess 10-230, so at least a portion of the protective structure 10-220 of the bottom 10-200 may overlap the driving assembly 10-600 when viewed in a direction that is perpendicular to the optical axis 10-O.

FIG. 5A is a schematic view of some elements of the aperture unit 10-1 under one condition. It should be noted that the protrusions 10-240 of the bottom 10-200 are disposed in the first trenches 10-412 of the first blades 10-410, and the protrusions 10-242 of the bottom 10-200 are disposed in the third trenches 10-422 and the fourth trenches 10-424 of the second blades 10-420. The first columns 10-520 of the guiding element 10-500 are disposed in the second trenches 10-414 of the first blades 10-410, and the second columns 10-530 of the guiding element 10-500 are disposed in the holes 10-426 of the second blades 10-420. In other words, the first blades 10-410 and the second blades 10-420 contact and are slidably connected to the bottom 10-200 (the fixed portion) and the guiding element 10-500 by different portions. Furthermore, the first blades 10-410 and the second blades 10-420 are positioned on different planes. For example, the distance between the first blades 10-410 and the circuit board 10-630 is greater than the distance between the second blades 10-420 and the circuit board 10-630.

It should be noted than in FIG. 5A, the first trench 10-412 of the first blade 10-410 extends in the X direction, and the second trench 10-414 of the first blade 10-410, the third trench 10-422 and the fourth trench 10-424 of the second blade 10-420 extend in the Y direction. At the same time, the first window edge 10-418 of the first blade 10-410 and the second window edge 10-428 of the second blade 10-420 form a window 10-430, and the size of the window 10-430 in the X direction is distance 10-D1 (the distance between the two first window edges 10-418), and the size of the window 10-430 in the Y direction is distance 10-D2. Furthermore, at least a portion of the first blade 10-410 overlaps the second blade 10-420 when viewed along the optical axis 10-O. For example, the first blade 10-410 may overlap the second blade 10-420 by the outer edge 10-416 in FIG. 4D. Accordingly, it can be ensured that the first blade 10-410 and the second blade 10-420 form the window 10-430.

FIG. 5B is a schematic view of the bottom 10-200, the guiding element 10-500 and the driving assembly 10-600 (includes the magnetic element 10-610, the driving substrate 10-620 and the circuit board 10-630) under the condition illustrated in FIG. 5A. The first columns 10-520, the second columns 10-530 and the positioning portion 10-540 are positioned in the guiding grooves 10-232 or the positioning recess 10-234 of the bottom 10-200. It should be noted that the sliding elements 10-700 (FIG. 2) are positioned between the bottom 10-200 and the first columns 10-520, the second columns 10-530 and the positioning position 10-540 to allow the guiding element 10-500 sliding relative to the bottom 10-200. The sliding element 10-700 is disposed in the concave portion 10-550 of the guiding element 10-500, so the relative positions between the guiding element 10-500 and the sliding element 10-700 may be fixed when the guiding element 10-500 is rotated, and the sliding element 10-700 slidably contacts the bottom 10-200 (fixed portion). Furthermore, the first column 10-520, the second column 10-530 and the positioning portion 10-540 are positioned at one side of the guiding groove 10-232 or the positioning recess 10-234, so the rotation direction of the guiding element 10-500 may be limited. For example, under the condition illustrated in FIG. 5B, the guiding element 10-500 cannot be rotated in the clockwise direction.

FIGS. 6A and 6B are schematic views of some elements of the aperture unit 10-1 under another condition, wherein an electromagnetic driving force created between the coil in the driving substrate 10-620 and the magnetic element 10-610 drives the guiding element 10-500 to be rotated, as shown by the rotation direction 10-R in FIG. 6B.

As a result, referring to FIG. 6A, the first blade 10-410 and the second blade 10-420 may be moved together due to the rotation of the guiding element 10-500. For example, in FIG. 6A, when the first column 10-520 of the guiding element 10-500 is rotated, the second trench 10-414 of the first blade 10-410 may be pushed, and the protrusions 10-240 on the bottom 10-200 and the first trench 10-212 of the first blade 10-410 may limit the moving direction of the first blade 10-410. The two protrusions 10-240