Fusing device to prevent overheating of a heating member and image forming apparatus having the same
AssigneeSamsung Electronics Co., Ltd.
InventorSok Won Paik
Life of this patent
Estimating the term…
Abstract
A fusing device to prevent overheating of a heating member includes a heating member having a heat emitting part disposed to transfer heat to recording media, an induction coil to create a magnetic field acting upon the heat emitting part, at least one magnetic body disposed around the induction coil, and an inductor cover disposed between the heating member and the magnetic body. The heating member includes a first region corresponding to a size of the recording media passing through the heating member and a second region outside the first region. The inductor cover includes at least one opening formed to correspond to the second region of the heating member such that heat generated from the heating member is directly radiated to the magnetic body.
Claims24
A fusing device comprising:
- a heating member, having a heat emitting part, disposed to transfer heat to recording media;
- an induction coil disposed to create a magnetic field acting upon the heat emitting part;
- at least one magnetic body disposed around the induction coil to concentrate the magnetic field created by the induction coil on the heat emitting part;
- and
- an inductor cover disposed between the heating member and the at least one magnetic body, wherein
- the heating member comprises a first region corresponding to a size of the recording media passing through the heating member and a second region outside the first region, and
- the inductor cover comprises at least one opening formed parallel to a heating member rotational direction at a portion corresponding to the second region of the heating member such that heat generated from the heating member is directly radiated to the at least one magnetic body.
An image forming apparatus comprising:
- a printing device to form an image on recording media;
- and
- a fusing device to fix the image to the recording media, the fusing device comprising:
- a heating member rotatably disposed to transfer heat to the recording media, the heating member having a first region located at a middle thereof in an axial direction thereof and second regions located at opposite sides of the first region;
- an inductor cover disposed to cover an outer surface of the heating member along the axial direction of the heating member;
- an induction coil disposed at a side opposite to the heating member with respect to the inductor cover to create a magnetic field;
- at least one first magnetic body disposed around the induction coil to concentrate the magnetic field created by the induction coil on the first region of the heating member;
- and
- at least one second magnetic body disposed around the induction coil to concentrate the magnetic field created by the induction coil on each of the second regions of the heating member,
- wherein the inductor cover comprises at least one opening formed parallel to a heating member rotational direction and located only at a position corresponding to at least one of the second regions to allow heat radiated from the heating member to pass through the inductor cover and reach the at least one second magnetic body.
A fusing apparatus, comprising:
- a heating unit to heat a recording medium;
- an induction coil to create a magnetic field to cause the heating unit to emit heat;
- a first magnetic body located over a first region of the heating unit to concentrate the magnetic field created by the induction coil on the first region heat emitting part;
- a second magnetic body located over a second region of the heating unit to concentrate the magnetic field created by the induction coil on the second region of the heat emitting part, the second magnetic body separated from the first magnetic body in a longitudinal direction of the heating unit;
- and
- an inductor cover positioned between the first and second magnetic bodies and the heating unit, the inductor cover comprising at least one opening formed parallel to a heating member rotational direction and located at a location corresponding to a position of the second magnetic body to transmit heat directly to the second magnetic body from the heating unit,
- wherein the second magnetic body is positioned over the second region of the heating unit to receive a greater magnitude of heat from the heating unit than the first magnetic body receives from the heating unit.
Dependencies are inferred from the claim text.