Image forming apparatus having overlapping rotator and recording medium receiving member

Patent metadata

Field	Value
Publication number	US-9588477-B2
Application number	US-201514825674-A
Country	US
Kind code	B2
Filing date	Aug 13, 2015
Priority date	Aug 22, 2014
Publication date	Mar 7, 2017
Grant date	Mar 7, 2017

Abstract

There is provided an image forming apparatus including a main body and a cartridge having an image carrier and a first coupling configured to rotate the image carrier. The main body includes a second coupling, a rotator and a receiving member. The second coupling is configured to rotate together with the first coupling about a rotation axis coaxially with the first coupling. The rotator includes gear teeth. The rotator is configured to rotate the second coupling in response to receiving the drive force from the drive source, and to rotate together with the second coupling about the rotation axis coaxially with the second coupling. The rotator, which is configured to rotate about the rotation axis coaxially with the first coupling configured to rotate the image carrier, overlaps with the receiving member when viewed from an axial direction parallel to the rotation axis.

First claim

What is claimed is:

1. An image forming apparatus comprising:
a main body including a drive source; and
a cartridge including an image carrier configured to carry a developer image thereon and a first coupling configured to rotate the image carrier, and configured to be mounted to and removed from the main body,
wherein the main body includes:
a second coupling configured to engage with and disengage from the first coupling, the second coupling configured to rotate together with the first coupling about a rotation axis coaxially with the first coupling when the second coupling engages with the first coupling;
a rotator including gear teeth disposed on a peripheral surface thereof, and configured to rotate the second coupling in response to receiving the drive force from the drive source and to rotate together with the second coupling about the rotation axis coaxially with the second coupling; and
a receiving member configured to receive a recording medium discharged outside the main body,

wherein the rotator, which is configured to rotate about the rotation axis coaxially with the first coupling configured to rotate the image carrier, overlaps with the receiving member when viewed from an axial direction parallel to the rotation axis,
wherein the receiving member has a pivot shaft and is configured to pivotally move about the pivot shaft, and
wherein the pivot shaft of the receiving member overlaps with the rotator when viewed, from the axial direction.

2. The image forming apparatus according to claim 1 , wherein the rotator is disposed further outward in the axial direction with respect to the receiving member.

3. The image forming apparatus according to claim 1 , wherein the main body includes:
an opening portion;
an opening-closing member configured to move between an open position in which the opening portion is open and a closed position in which the opening portion is closed;
an interlocking mechanism configured to disengage the second coupling from the first coupling in response to movement of the opening-closing member from the closed position to the open position, and configured to engage the second coupling with the first coupling in response to movement of the opening-closing member from the open position to the closed position, the interlocking mechanism including:
a coupling portion connected to the opening-closing member; and
a displacing portion configured to displace the second coupling, the displacing portion disposed further outward in the axial direction with respect to the rotator.

4. The image forming apparatus according to claim 3 , wherein the opening-closing member serves as the receiving member.

5. The image forming apparatus according to claim 4 ,
wherein the receiving member includes:
a pair of side walls disposed with a space therebetween in the axial direction; and
a receiving wall disposed between the pair of side walls and configured to receive the recording medium discharged outside the main body, and

wherein the opening-closing member serves as the receiving wall.

6. The image forming apparatus according to claim 4 , wherein the coupling portion is disposed further inward in the axial direction with respect to an outer end of the receiving member in the axial direction.

7. The image forming apparatus according to claim 6 ,
wherein the interlocking mechanism includes:
a first coupling portion extending in a direction orthogonal to the axial direction and connected to the coupling portion;
a second coupling portion extending in a direction orthogonal to the axial direction and connected to the displacing portion; and
a rotation shaft extending in the axial direction and connecting the first coupling portion and the second coupling portion, and

wherein the interlocking mechanism is configured to pivot about the rotation shaft.

8. The image forming apparatus according to claim 7 , wherein the rotation shaft connects the first coupling portion and the second coupling portion such that drive force is transmitted from the first coupling portion to the second coupling portion via the rotation shaft.

9. The image forming apparatus according to claim 8 , wherein the rotation shaft is disposed outside a projection plane of the rotator when projected in the axial direction.

10. An image forming apparatus, comprising:
a main body including a drive source; and
a cartridge including an image carrier configured to carry a developer image thereon and a first coupling configured to rotate the image carrier, and configured to be mounted to and removed from the main body,
wherein the main body includes:
a second coupling configured to engage with and disengage from the first coupling, the second coupling configured to rotate together with the first coupling about a rotation axis coaxially with the first coupling when the second coupling engages with the first coupling;
a rotator including gear teeth disposed on a peripheral surface thereof, and configured to rotate the second coupling in response to receiving the drive force from the drive source and to rotate together with the second coupling about the rotation axis coaxially with the seed coupling; and
a receiving member configured to receive a recording medium discharged outside the main body,

wherein the rotator, which is configured to rotate about the rotation axis coaxially with the first coupling configured to rotate the image carrier, overlaps with the receiving member when viewed from an axial direction parallel to the rotation axis,
wherein the main body includes a refeeding portion configured to feed the recording medium having the developer image from the image carrier fixed thereon, to the image carrier again, and the refeeding portion includes a vertical refeeding path extending vertically and a horizontal refeeding path extending horizontally, and
wherein the rotator overlaps with the horizontal refeeding path of the refeeding portion and does not overlap with the vertical refeeding path of the refeeding portion when viewed from the axial direction.

11. An image forming apparatus, comprising:
a main body including a drive source; and
a cartridge including an image carrier configured to carry a developer image thereon and a first coupling configured to rotate the image carrier, and configured to be mounted to and removed from the main body,
wherein the main body includes:
a second coupling configured to engage with and disengage from the first coupling, the second coupling configured to rotate together with the first coupling about a rotation axis coaxially with the first coupling when the second coupling engages with the first coupling;
a rotator including gear teeth disposed on a peripheral surface thereof, and configured to rotate the second coupling in response to receiving the drive force from the drive source and to rotate together with the second coupling about the rotation axis coaxially with the second coupling; and
a receiving member configured to receive a recording medium discharged outside the main body,

wherein the rotator, which is configured to rotate about the rotation axis coaxially with the first coupling configured to rotate the image carrier, overlaps with the receiving member when viewed from an axial direction parallel to the rotation axis,
wherein the image forming apparatus further comprises an accommodating member configured to accommodate the recording medium to be supplied to the image carrier,
wherein the rotator overlaps with the accommodating member when viewed from the axial direction.

12. The image forming apparatus according to claim 1 , further comprising an exposure member configured to expose the image c

Assignees

• Brother Ind Ltd

Inventors

• Sato Shougo

Classifications

• G03G21/1857 Primary

  for transmitting mechanical drive power to the process cartridge, drive mechanisms, gears, couplings, braking mechanisms · CPC title

• G03G15/757 Primary

  Drive mechanisms for photosensitive medium, e.g. gears · CPC title