Image forming apparatus that includes a medium conveyance unit, an image recording unit, and recording unit support portions

1. An image forming apparatus comprising:

a medium conveyance unit that includes

medium conveying members which convey a medium on which an image is to be recorded, and

an outlet from which the medium is output;

an image recording unit that includes an image recording device which records the image on the medium conveyed from the medium conveyance unit at an image recording region which is located on a side of the outlet; and

recording unit support portions that have

a first support portion and a second support portion which are disposed in the image recording unit on the side of the outlet and are spaced from each other in a width direction of the medium conveyed, and

a third support portion which is disposed in the image recording unit on an opposite side to the outlet,

wherein at least the first support portion and the second support portion are supported on the side of the outlet of the medium conveyance unit, and

the image recording unit is supported by the medium conveyance unit in an undetachable manner for a user who uses the image forming apparatus.

2. The image forming apparatus according to claim 1 ,

wherein the medium conveying members include a timing adjusting member which adjusts timing of sending the medium to the image recording region.

3. The image forming apparatus according to claim 1 ,

wherein the image recording unit further comprises:

an image holding body that is rotated while holding the image on a surface thereof;

an intermediate transfer body that is an endless belt, to which the image is transferred from the surface of the image holding body, and from which the image is transferred to the medium at the image recording region; and

a primary transfer device that transfers the image from the image holding body to the intermediate transfer body.

4. The image forming apparatus according to claim 3 ,

wherein the image recording unit has side walls which support the image holding body, the intermediate transfer body, and a latent image forming device for forming a latent image on the image holding body.

5. The image forming apparatus according to claim 3 , further comprising:

a fusing unit that has a fusing device fusing the image transferred to the medium; and

fusing unit support portions that are disposed on the side of the image recording region in the image recording unit and supports the fusing unit.

6. The image forming apparatus according to claim 1 , further comprising:

a positioning member that is disposed on the side of the outlet of the medium conveyance unit and positions and supports in a rotatable manner, the image recording unit.

7. The image forming apparatus according to claim 6 , further comprising:

a first rotation transmission member that is supported by the image recording unit;

a second rotation transmission member that is supported by the medium conveyance unit; and

an intermediate transmission member that is supported by the positioning member and that is engaged with the first rotation transmission member and the second rotation transmission member,

wherein the intermediate transmission member transmits rotation from the first rotation transmission member to the second rotation transmission member.

8. The image forming apparatus according to claim 1 ,

wherein the third support portion is disposed approximately at the center, in a width direction of the medium, of the image recording unit.

9. The image forming apparatus according to claim 8 ,

wherein the third support portion has a fastening structure which is fastened from a horizontal direction of the image recording unit.

10. The image forming apparatus according to claim 1 , further comprising:

an exterior member that is supported by the medium conveyance unit,

wherein the exterior member constitutes external surfaces of the image forming apparatus.

11. The image forming apparatus according to claim 10 ,

wherein the exterior member is plural exterior members which have exterior-to-exterior fixing portions which fix the plural exterior members to each other.