Image forming apparatus

Patent metadata

Field	Value
Publication number	US-9261853-B2
Application number	US-201414305083-A
Country	US
Kind code	B2
Filing date	Jun 16, 2014
Priority date	Jun 20, 2013
Publication date	Feb 16, 2016
Grant date	Feb 16, 2016

Abstract

An image forming apparatus, including an image forming unit having a photosensitive drum and a developer device; a first frame, made of a resin, formed in an approximate shape of a rectangle plate having shorter sides and longer sides, and arranged on one end, along an axial direction of a rotation axis of the photosensitive drum, of the image forming unit; a first beam formed in an elongated shape, arranged along and fixed to a planar face of the first frame, is provided. The first beam is arranged to partly overlap the image forming unit, when viewed along a facing direction to face the planar face of the first frame orthogonally, and is fixed to end parts on the longer sides of the first frame at longitudinal ends thereof at least along the facing direction.

First claim

What is claimed is:

1. An image forming apparatus, comprising:
an image forming unit comprising a photosensitive drum configured to be rotatable about a rotation axis and a developer device configured to supply developer agent to the photosensitive drum;
a first frame made of a resin and formed in an approximate shape of a rectangle plate having shorter sides and longer sides, the first frame being arranged on one end, along an axial direction of the rotation axis of the photosensitive drum, of the image forming unit;
a first beam formed in an elongated shape, the first beam being arranged along and fixed to a planar face of the first frame; and
a spring electrode configured to supply electricity to the image forming unit is arranged on the first frame and is arranged in a position between the first frame and the image forming unit in a compressed condition,
wherein the first beam is arranged to partly overlap the image forming unit, when viewed along a facing direction to face the planar face of the first frame orthogonally, and is fixed to end parts on the longer sides of the first frame at longitudinal ends thereof at least along the facing direction.

2. The image forming apparatus according to claim 1 , wherein the first beam is arranged to longitudinally extend orthogonally to a direction of the longer sides of the first frame.

3. The image forming apparatus according to claim 1 , further comprising:
a second beam formed in an elongated shape, the second beam being arranged along and fixed to the planar face of the first frame, wherein the second beam is arranged to intersect with the first beam.

4. The image forming apparatus according to claim 1 , wherein the first beam is made of a metal.

5. The image forming apparatus according to claim 4 , wherein the first beam is formed of a metal bar having a first section, which spreads orthogonally to the axial direction, and a second section, which spreads from the first section along the axial direction.

6. The image forming apparatus according to claim 1 , further comprising:
a second frame arranged on another end of the image forming unit to face the first frame across the image forming unit; and
a connecting frame configured to be connected to the first frame and the second frame,
wherein one of the longitudinal ends of the first beam is arranged to overlap the connecting frame when projected along the axial direction.

7. The image forming apparatus according to claim 6 , further comprising:
a second beam formed in an elongated shape, the second beam being arranged along the planar face of the first frame to intersect with the first beam and fixed to the first frame,
wherein the other one of the longitudinal ends of the first beam is engaged with the first frame; and
wherein the second beam is arranged in a position between the first beam and the first frame.

8. The image forming apparatus according to claim 7 ,
wherein the image forming unit comprises a plurality of image forming units, the plurality of image forming units being arranged to align along an aligning direction, which is orthogonal to the rotation axis;
wherein the first beam is arranged to longitudinally extend orthogonally to the aligning direction and to the axial direction; and
wherein the second beam is arranged to longitudinally extend along the aligning direction.

9. The image forming apparatus according to claim 8 , further comprising:
a drawer configured to support the plurality of image forming units, the drawer being movably supported by the first frame to move along the aligning direction,
wherein the second beam is arranged to overlap the drawer when projected along the axial direction.

10. The image forming apparatus according to claim 1 ,
wherein the first frame comprises a plurality of substrate supports, which are configured to support a substrate, the substrate being configured to supply electricity to the image forming unit via the spring electrode.

11. The image forming apparatus according to claim 10 ,
wherein the plurality of substrate supports are arranged on an opposite side from the image forming unit across the first frame; and
wherein the first frame comprises a through hole, in which the spring electrode is arranged to penetrate there-through.

12. An image forming apparatus, comprising:
an image forming unit comprising a photosensitive drum configured to be rotatable about a rotation axis and a developer device configured to supply a developer agent to the photosensitive drum;
a first frame made of a resin and formed in an approximate shape of a rectangle plate having shorter sides and longer sides, the first frame being arranged on one end, along an axial direction of the rotation axis of the photosensitive drum, of the image forming unit; and
a first beam formed in an elongated shape and made of metal, the first beam being arranged along and fixed to a planar face of the first frame,
wherein the first beam is arranged to partly overlap the image forming unit, when viewed along a facing direction to face the planar face of the first frame orthogonally, and is fixed to end parts on the longer sides of the first frame at longitudinal ends thereof at least along the facing direction, and
wherein the first beam is formed of a metal bar having a first section, which spreads orthogonally to the axial direction, and a second section, which spreads from the first section along the axial direction.

13. The image forming apparatus according to claim 12 , wherein the first beam is arranged to longitudinally extend orthogonally to a direction of the longer sides of the first frame.

14. The image forming apparatus according to claim 12 , further comprising:
a second beam formed in an elongated shape, the second beam being arranged along and fixed to the planar face of the first frame, wherein the second beam is arranged to intersect with the first beam.

15. The image forming apparatus according to claim 12 , further comprising:
a second frame arranged on another end of the image forming unit to face the first frame across the image forming unit; and
a connecting frame configured to be connected to the first frame and the second frame,
wherein one of the longitudinal ends of the first beam is arranged to overlap the connecting frame when projected along the axial direction.

16. The image forming apparatus according to claim 15 , further comprising:
a second beam formed in an elongated shape, the second beam being arranged along the planar face of the first frame to intersect with the first beam and fixed to the first frame,
wherein the other one of the longitudinal ends of the first beam is engaged with the first frame; and
wherein the second beam is arranged in a position between the first beam and the first frame.

17. The image forming apparatus according to claim 16 ,
wherein the image forming unit comprises a plurality of image forming units, the plurality of image forming units being arranged to align along an aligning direction, which is orthogonal to the rotation axis;
wherein the first beam is arranged to longitudinally extend orthogonally to the aligning direction and to the axial direction; and
wherein the second beam is arranged to longitudinally extend along the aligning direction.

18. The image forming apparatus according to claim 17 , further comprising:
a drawer configured to support the plurality of image forming units, the drawer being movably supported by the first frame to move along the aligning direction,
wherein the second beam is arranged to overl

Assignees

• Brother Ind Ltd

Inventors

• Souda Makoto
• Nishimura Yohei

Classifications

• G03G21/1842

  for guiding and mounting the process cartridge, positioning, alignment, locks (G03G21/1864 and G03G21/1871 take precedence) · CPC title

• G03G21/1867

  for electrically connecting the process cartridge to the apparatus, electrical connectors, power supply · CPC title

• G03G15/80

  Details relating to power supplies, circuits boards, electrical connections · CPC title

• G03G2221/1684

  using extractable subframes, e.g. on rails or hinges · CPC title

• G03G21/1619 Primary

  Frame structures · CPC title