Oval foramen suturing device and limiting component thereof

The invention belongs to the technical field of medical instruments, and particularly relates to an oval foramen suturing device and a limiting component of the oval foramen suturing device. Wherein the limiting component comprises a sheath tube assembly, a sleeve shell, a first opening and closing arm assembly and a second opening and closing arm assembly, the sleeve shell is connected with the second end of the sheath tube assembly, the first opening and closing arm assembly has a first opening state and a first closing state, and the second opening and closing arm assembly has a second opening state and a second closing state; the first opening and closing arm assembly comprises a first opening and closing arm and a first connecting block, the second opening and closing arm assembly comprises a second opening and closing arm and a second connecting block, at least one of the first connecting block and the second connecting block is arranged in the sleeve shell in a sliding mode, and the first end of the sh