Fixing device, and image forming apparatus

Abstract

The invention provides a fixing device and an image forming apparatus capable of maintaining the shape of the cross section of a holder and meanwhile improving the assembly. The fixing device comprises a fixing belt, a pressure roller which is in compression joint with the outer periphery of the fixing belt and is fixedly arranged inside the fixing belt, a holder with the outer periphery thereof being slidingly contacted with the inner periphery of the fixing belt, a heater for heating the holder, a tubular portion (28a) for maintaining the shape of the portion adjacent to the end of the holder through the internal part that is inserted in the axial end of the holder, and a flange (28b) fixedly arranged in a frame of fixing device, so as to mount and dismount a flange component (28) in the frame of the fixing device in such a manner to maintain the holder. In a portion of the flange component (28) on the periphery of the tubular portion (28a), inclined surfaces (28d1, 28d2) which are extended in the axial direction of the tubular portion (28a) and are inclined towards the tubular center along with the axial distal end at the outer peripheral side of the tubular portion (28a) are arranged, and a guide portion (28d) which is slidingly contacted with the inner peripheral portion of the holder and then is guided onto the outer periphery of the tubular portion (28a) when inserted into the internal part of the axial end of the holder is arranged.

Description

technical field [0001] The present invention relates to a fixing device for fixing toner to a recording medium by heat and pressure, and a FAX (facsimile machine), printer, copying machine, and multifunction machine using an electrophotographic method, an electrostatic recording method, or the like using the fixing device and other image forming devices. Background technique [0002] Conventionally, as image forming apparatuses such as copiers and printers, various image forming apparatuses using electrophotography are generally considered. The image forming process is to form an electrostatic latent image on the surface of the photoreceptor drum of the image carrier, and to visualize the electrostatic latent image on the photoreceptor drum by developing the toner of the developer, etc. Then, the developed image is transferred to recording paper by a transfer device, and the image is placed on it, and the toner image on the recording paper is fixed by a fixing device using ...

AI Technical Summary

Problems solved by technology

[0015] However, in the process of assembling several parts on the side of the fixing member such as the supporting member as an assembly, there is a problem of assemblability.

That is, since the support member is a thin metal tube, and its cross-section at least accommodates the clamping forming part, it is determined that it is not a simple circle, so the inner diameter of the axial end portion of the support member It is difficult to smoothly insert the cylindrical part of the flange part with a small clearance

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