Elevator parking lock, panel assembly and elevator calling board

The invention relates to an elevator parking lock, a panel assembly and an elevator calling board. The elevator parking lock comprises an outer casing, a cam, a first sliding block and a second sliding block; first static splicing pieces and second static splicing pieces are arranged on the inner side of the outer casing; the cam is fixed on a lock cylinder located inside the outer casing; a third groove is formed in the periphery of the cam; the first sliding block is retractably arranged on the side wall of the outer casing to abut against the third groove in a clamped manner and be separated from the third groove, so that a first moving splicing piece is driven to abut against and be separated from the first static splicing pieces; and the second sliding block is retractably arranged on the side wall of the outer casing to abut against the third groove in a clamped manner and be separated from the third groove, so that a second moving splicing piece is driven to abut against and be separated from the secon