| 摘要 |
A fixing device includes a tubular film; a heater including a first surface being in contact with the film, the heater including a substrate and a heat-generating resistor; a heat-conductive member being in contact with a second surface of the heater opposite to the first surface, the heat-conductive member having a higher thermal conductivity than the substrate; and a supporting member supporting the heater with the heat-conductive member interposed therebetween. The heat-conductive member includes first and second parts at upstream and downstream ends, respectively, in a conveyance direction, and a third part between the first and second parts. The first to third parts are each held between the supporting member and the heater. A non-contact area between the heat-conductive member and the supporting member is provided between the first part and the second part in the conveyance direction. The heat-conductive member is shorter than the heater in the conveyance direction. |
| 主权项 |
1. A fixing device that fixes a toner image on a recording material while conveying the recording material carrying the toner image at a nip, the fixing device comprising:
a tubular film; a heater including a first surface that is in contact with the film, the heater including a substrate and a heat-generating resistor provided on the substrate; a heat-conductive member that is in contact with a second surface of the heater opposite to the first surface, the heat-conductive member having a higher thermal conductivity than the substrate; and a supporting member that supports the heater with the heat-conductive member interposed between the supporting member and the heater, wherein the heat-conductive member includes
a first part disposed at an upstream end in a conveyance direction of the recording material, the first part being in contact with both the supporting member and the heater and being held between the supporting member and the heater;a second part disposed at a downstream end in the conveyance direction, the second part being in contact with both the supporting member and the heater and being held between the supporting member and the heater; anda third part disposed between the first part and the second part in the conveyance direction, the third part being in contact with both the supporting member and the heater and being held between the supporting member and the heater, wherein a non-contact area, in which the heat-conductive member is not in contact with the supporting member, is provided between the first part and the second part in the conveyance direction, and wherein a length of the heat-conductive member in the conveyance direction is shorter than a length of the heater in the conveyance direction. |
