The utility model relates to a dimmer, which can include a coil, a first metal magnetic core, a hand rotating screw and an elastic part. The first metal core can be arranged on one side of the coil and can be movably penetrated in the center of the coil. The hand rotating screw can be connected with the first metal core and can be rotated to move the first metal core. The elastic member can be arranged between the hand rotating screw and the first metal core, and can provide the pushing force to the first metal core.一種調光器，其可包含線圈、第一金屬磁芯、手轉螺絲及彈性件。第一金屬磁芯可設置於線圈之一側並可移動地穿設於線圈之中心。手轉螺絲可與第一金屬磁芯連接，並可轉動以移動第一金屬磁芯。彈性件可設置於手轉螺絲與第一金屬磁芯之間，並可提供推抵力至第一金屬磁芯。
