IMAGE-FORMING DEVICE HAVING WASTE DEVELOPER MATERIAL ACCOMMODATING PART AND DEVELOPER MATERIAL UNIT HAVING THE SAME

• US 20120213566A1
• Filed: 01/31/2012
• Published: 08/23/2012
• Est. Priority Date: 02/21/2011
• Status: Active Grant

• Current Assignee: Brother Kogyo Kabushiki Kaisha (Brother Industries Limited)
• Original Assignee: Brother Kogyo Kabushiki Kaisha (Brother Industries Limited)
• Inventors: SATO, Shougo
• Granted Patent: US 8,934,828 B2
• Time in Patent Office: Days
• US Class Current: 399/358
• CPC Class Codes: G03G 21/105 Arrangements for conveying toner waste
• CPC Class Codes: G03G 21/12 Toner waste containers
• CPC Class Codes: G03G 2215/0132 vertical medium transport path at the secondary transfer

Abstract

In an image-forming device, a recovering unit removes waste developer material to be discarded from a target and collects the waste developer material. A waste developer material accommodating part is provided integrally with the developer material accommodating part and accommodates waste developer material collected by the recovering unit. A waste developer material conveying mechanism is connected to both of the recovering unit and the waste developer material accommodating part and conveys the waste developer material from the recovering unit to the waste developer material accommodating part. An urging member is interposed between the waste developer material accommodating part and the waste developer material conveying mechanism and urges a developing roller toward a photosensitive drum via a developer material accommodating part.

Claims

1. An image-forming device, comprising:

a photosensitive drum;

a developer material accommodating part that is configured to accommodate developer material;

a developing roller that is configured to supply the photosensitive drum with the developer material accommodated in the developer material accommodating part;

a recovering unit that is configured to remove, from a target for waste developer material recovery, waste developer material to be discarded from the target and collect the waste developer material;

a waste developer material accommodating part that is provided integrally with the developer material accommodating part and that is configured to accommodate waste developer material collected by the recovering unit;

a waste developer material conveying mechanism that is configured to be connected to both of the recovering unit and the waste developer material accommodating part and to convey the waste developer material from the recovering unit to the waste developer material accommodating part; and

an urging member that is interposed between the waste developer material accommodating part and the waste developer material conveying mechanism and that is configured to urge the developing roller toward the photosensitive drum via the developer material accommodating part.

2. The image-forming device as claimed in claim 1, wherein the waste developer material conveying mechanism includes:

a first conveying member that is configured to receive, from the recovering unit, waste developer material collected by the recovering unit and to convey the waste developer material to one side that is defined along an axial direction of the photosensitive drum;

a second conveying member that is connected to the first conveying member and is configured to receive waste developer material from the first conveying member and to convey the waste developer material in a direction intersecting with the axial direction; and

a third conveying member that extends along the axial direction and that is configured to be connected with the second conveying member, to receive the waste developer material from the second conveying member, and to convey the waste developer material to the waste developer material accommodating part.

3. The image-forming device as claimed in claim 2, wherein the third conveying member is disposed outside the waste developer material accommodating part and is configured to move relative to the waste developer material accommodating part.

4. The image-forming device as claimed in claim 2, wherein the third conveying member has a pair of protruding end portions along the axial direction, both of which protrude farther outward along the axial direction than a pair of opposite side surfaces of the waste developer material accommodating part defined along the axial direction, the second conveying member being configured so as to be connected to one protruding end portion, among the pair of protruding end portions, of the third conveying member.

5. The image-forming device as claimed in claim 4, wherein the one protruding end portion of the third conveying member is formed with an external communication through-hole that is provided in fluid communication with the second conveying member, the third conveying member being provided with a shutter that is configured to open and close the external communication through-hole.

6. The image-forming device as claimed in claim 4, further comprising:

a drum holding member that is configured to hold the photosensitive drum,

wherein the developer material accommodating part, the waste developer material accommodating part, and the third conveying member are configured as a single developer material unit that can be mounted in and removed from the drum holding member,

wherein the image-forming device further comprises;

an end-holding part that is fixed relative to the drum holding member and that is configured to hold the pair of protruding end portions of the third conveying member when the developer material accommodating part, the waste developer material accommodating part, and the third conveying member are held by the drum holding member as the developer material unit.

7. The image-forming device as claimed in claim 6, wherein the end-holding part has an urging-force receiving portion that is configured to contact the pair of protruding end portions of the third conveying member when the developer material unit is held by the drum holding member, thereby receiving the urging force of the urging member through the pair of protruding end portions of the third conveying member.

8. The image-forming device as claimed in claim 7, wherein the waste developer material accommodating part has another urging-force receiving part that is configured to contact the third conveying member when the developer material unit is removed from the drum holding member, thereby receiving the urging force of the urging member through the third conveying member.

9. The image-forming device as claimed in claim 2, wherein the urging member is interposed between the third conveying member and a pair of end portions of the waste developer material accommodating part along the axial direction.

10. The image-forming device as claimed in claim 2, wherein the third conveying member includes:

a main body part that is cylindrically shaped with its central axis oriented in the axial direction; and

a connecting part that extends from the main body part in a direction orthogonal to the axial direction and connects to the waste developer material accommodating part.

11. The image-forming device as claimed in claim 10, wherein the connecting part is connected to a center region of the waste developer material accommodating part along the axial direction.

12. The image-forming device as claimed in claim 10, wherein the connecting part is connected to the waste developer material accommodating part so as to be capable of moving relative to the waste developer material accommodating part.

13. The image-forming device as claimed in claim 12, wherein the waste developer material accommodating part is formed with a piston guide part that has a cylindrical shape with its central axis extending orthogonal to the axial direction,

the connecting part has a cylindrical shape with its central axis extending orthogonal to the axial direction, and is inserted into the piston guide part, and

a sealing member of a cylindrical shape is interposed between the connecting part and the piston guide part.

14. The image-forming device as claimed in claim 10, wherein the main body part is formed with an internal communication through-hole that is in fluid communication with the connecting part, and

the third conveying member includes:

a shutter that is provided so as to be capable of moving along an inner peripheral surface of the main body part between an open position opening the internal communication through-hole and a closed position closing the internal communication through-hole; and

an operating lever that is configured so as to be operated to move the shutter between the open position and closed position.

15. The image-forming device as claimed in claim 1, further comprising an endless belt confronting the photosensitive drum, the target for waste developer material recovery being the endless belt.

16. The image-forming device as claimed in claim 1, wherein the target for waste developer material recovery is the photosensitive drum.

17. A developer material unit for being mounted in an image-forming device, the developer material unit comprising:

a developer material accommodating part that is configured to accommodate developer material for being used for image formation executed in the image-forming device;

a waste developer material accommodating part that is provided integrally with the developer material accommodating part and that is configured to accommodate waste developer material to be discarded from the image-forming device;

a waste developer material conveying member that is disposed outside the waste developer material accommodating part and that is configured to convey the waste developer material to the waste developer material accommodating part; and

an urging member that is interposed between the waste developer material accommodating part and the waste developer material conveying member and that is configured to urge the developer material accommodating part in a direction to separate the developer material accommodating part away from the waste developer material conveying member.

18. The developer material unit as claimed in claim 17, wherein the waste developer material conveying member includes:

a main body part that is cylindrically shaped with its central axis extending along a central axis direction; and

a connecting part that extends from the main body part in a direction orthogonal to the central axis direction and connects to the waste developer material accommodating part.

19. The developer material unit as claimed in claim 18, wherein the connecting part is connected to a center region of the waste developer material accommodating part along the central axis direction.

20. The image-forming device as claimed in claim 18, wherein the connecting part is connected to the waste developer material accommodating part so as to be capable of moving relative to the waste developer material accommodating part.

21. The developer material unit as claimed in claim 20, wherein the waste developer material accommodating part is formed with a piston guide part that has a cylindrical shape with its central axis extending orthogonal to the central axis direction,

the connecting part has a cylindrical shape with its central axis extending orthogonal to the central axis direction, and is inserted into the piston guide part, and

a sealing member of a cylindrical shape is interposed between the connecting part and the piston guide part.

22. The developer material unit as claimed in claim 18, wherein the main body part is formed with a through-hole that is in fluid communication with the connecting part, and

the waste developer material conveying member includes:

a shutter that is provided so as to be capable of moving along an inner peripheral surface of the main body part between an open position opening the through-hole and a closed position closing the through-hole; and

an operating lever that is configured so as to be operated to move the shutter between the open position and closed position.