An arc path formation unit, comprising: a magnet frame having an inner space, and comprising a plurality of surfaces (511, 512, 513, 514) surrounding the inner space; and magnets coupled to the plurality of surfaces (511, 512, 513, 514) to form magnetic fields in the inner space, wherein the plurality of surfaces (511, 512, 513, 514) comprise: a first surface extending in one direction; and a second surface disposed to face the first surface and extending in the one direction, wherein the magnets comprise: a first magnet disposed on one of the first surface and the second surface; a second magnet disposed on another one of the first surface and the second surface; and a third magnet disposed on the another surface with being spaced apart from the second magnet by a predetermined distance, wherein the second magnet and the third magnet are disposed to form a predetermined angle with the another surface, and wherein a first facing surface of the first magnet facing the another surface has a polarity different from a polarity of a second facing surface of the second magnet and a third facing surface of the third magnet both facing the one surface, characterized in that the second magnet is disposed such that a distance between one end portion thereof in the extending direction that faces the third magnet and the one surface is longer than a distance between another end portion in the extending direction and the one surface. a magnet frame having an inner space, and comprising a plurality of surfaces (511, 512, 513, 514) surrounding the inner space; and magnets coupled to the plurality of surfaces (511, 512, 513, 514) to form magnetic fields in the inner space, wherein the plurality of surfaces (511, 512, 513, 514) comprise: a first surface extending in one direction; and a second surface disposed to face the first surface and extending in the one direction, wherein the magnets comprise: a first magnet disposed on one of the first surface and the second surface; a second magnet disposed on another one of the first surface and the second surface; and a third magnet disposed on the another surface with being spaced apart from the second magnet by a predetermined distance, wherein the second magnet and the third magnet are disposed to form a predetermined angle with the another surface, and wherein a first facing surface of the first magnet facing the another surface has a polarity different from a polarity of a second facing surface of the second magnet and a third facing surface of the third magnet both facing the one surface, characterized in that the second magnet is disposed such that a distance between one end portion thereof in the extending direction that faces the third magnet and the one surface is longer than a distance between another end portion in the extending direction and the one surface. a first surface extending in one direction; and a second surface disposed to face the first surface and extending in the one direction, wherein the magnets comprise: a first magnet disposed on one of the first surface and the second surface; a second magnet disposed on another one of the first surface and the second surface; and a third magnet disposed on the another surface with being spaced apart from the second magnet by a predetermined distance, wherein the second magnet and the third magnet are disposed to form a predetermined angle with the another surface, and wherein a first facing surface of the first magnet facing the another surface has a polarity different from a polarity of a second facing surface of the second magnet and a third facing surface of the third magnet both facing the one surface, characterized in that the second magnet is disposed such that a distance between one end portion thereof in the extending direction that faces the third magnet and the one surface is longer than a distance between another end portion in the extending direction and the one surface. a first magnet disposed on one of the first surface and the second surface; a second magnet disposed on another one of the first surface and the second surface; and a third magnet disposed on the another surface with being spaced apart from the second magnet by a predetermined distance, wherein the second magnet and the third magnet are disposed to form a predetermined angle with the another surface, and wherein a first facing surface of the first magnet facing the another surface has a polarity different from a polarity of a second facing surface of the second magnet and a third facing surface of the third magnet both facing the one surface, characterized in that the second magnet is disposed such that a distance between one end portion thereof in the extending direction that faces the third magnet and the one surface is longer than a distance between another end portion in the extending direction and the one surface.