Patent ID: 11865904
Assignee: YOUNG SUNG GEUM
Field: Transport (Mechanical engineering)
Classification: CPC B | IPC B

Claim 2:
3. The automatic light blocking device of claim 2, wherein the light blocking slider comprises at least a first slider and a second slider among
the first slider configured to slidably insert into and couple to the first sliding groove;
the second slider configured to slidably insert into and couple to the second sliding groove;
a third slider configured to slidably insert into and couple to the third sliding groove; and
a fourth slider configured to slidably insert into and couple to the fourth sliding groove, and
the driving unit comprises at least a first unit and a second unit among
the first unit configured to slide the first slider in the light blocking body;
the second unit configured to slide the second slider in the light blocki body;
a third unit configured to slide the third slider in the light blocking body; and
a fourth unit configured to slide the fourth slider in the light blocking body.