IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0732261
(2010-03-26)
|
등록번호 |
US-8385789
(2013-02-26)
|
우선권정보 |
JP-2009-141452 (2009-06-12); JP-2009-141453 (2009-06-12); JP-2009-141454 (2009-06-12) |
발명자
/ 주소 |
- Sato, Shougo
- Nishiwaki, Kenjiro
|
출원인 / 주소 |
- Brother Kogyo Kabushiki Kaisha
|
인용정보 |
피인용 횟수 :
0 인용 특허 :
6 |
초록
▼
A development device, comprising: a casing; a developer reservoir formed at a bottom part of the casing; a developer supply chamber that accommodates the developer; a developer holding body that is provided to be rotatable about a rotation axis extending in a width direction of the casing and is loc
A development device, comprising: a casing; a developer reservoir formed at a bottom part of the casing; a developer supply chamber that accommodates the developer; a developer holding body that is provided to be rotatable about a rotation axis extending in a width direction of the casing and is located on an upper side of the developer reservoir to face an image holding body; a first carry member that is provided in the developer supply chamber to extend in the width direction and to carry the developer to the width direction, a second carry member that is provided on a casing side to extend in the width direction and to carry the developer to the width direction; and a carry substrate that is provided in the casing so that the developer is carried from the developer reservoir to a position facing the developer holding body.
대표청구항
▼
1. A development device for supplying a developer to an image holding body, comprising: a casing;a developer reservoir formed at a bottom part of the casing to store the developer;a developer supply chamber different from the casing and configured to accommodate the developer;a developer holding bod
1. A development device for supplying a developer to an image holding body, comprising: a casing;a developer reservoir formed at a bottom part of the casing to store the developer;a developer supply chamber different from the casing and configured to accommodate the developer;a developer holding body that is a roller-like member rotatable about a rotation axis extending in a width direction of the casing and that is located on an upper side of the developer reservoir in the casing such that an outer circumferential surface of the developer holding body is positioned to face the image holding body;a first carry member provided in the developer supply chamber, extended in the width direction of the casing and configured to carry the developer in the width direction in which the rotation axis of the developer holding body extends, the first carry member being configured to supply the developer to the developer reservoir;a second carry member provided on a casing side, extended in the width direction of the casing and configured to carry the developer in the width direction in which the rotation axis of the developer holding body extends; anda carry substrate provided in the casing, the carry substrate including a plurality of carrying electrodes configured to generate an electric field by application of a voltage such that the developer is carried from the developer reservoir to a position facing the developer holding body. 2. The development device according to claim 1, further comprising:a supply opening formed in the casing to allow the developer to pass therethrough from the developer supply chamber to the developer reservoir; anda recovery opening formed in the casing to allow the developer to pass therethrough from the developer reservoir to the developer supply chamber,wherein:the first carry member is configured to supply the developer to the developer reservoir through the supply opening while carrying the developer from the recovery opening toward the supply opening;the second carry member is provided in the developer reservoir, and is configured to carry, from the supply opening toward the recovery opening, the developer supplied from the developer supply chamber; andthe carry substrate is provided on an opposite side of the developer supply chamber on an inner wall of the casing such that the developer being carried from the supply opening to the recovery opening is carried to the position facing the developer holding body. 3. The development device according to claim 2, wherein the first carry member and the second carry member are provided to be parallel with each other along a horizontal direction. 4. The development device according to claim 2, wherein the carry substrate comprises a vertical carry part formed to carry the developer in a vertical direction. 5. The development device according to claim 2, wherein:the inner wall of the casing on which the carry substrate is provided is formed to be straight when viewed as a side view so as to face the second carry member in a horizontal direction; andthe developer is stored in the developer reservoir in a vertical direction such that a top of the developer is situated at a position which is lower than an upper edge of the second carry member and at which the top of the developer faces the inner wall of the casing on which the carry substrate is provided. 6. The development device according to claim 2, wherein:the second carry member comprises a spiral part having a form of a spiral extending in the width direction of the casing; andthe second carry member has a circular shape when viewed as a side view. 7. The development device according to claim 2, wherein the supply opening and the recovery opening are arranged to be parallel with each other in a horizontal direction. 8. The development device according to claim 1, further comprising:a developer carry chamber that is provided in the casing to be located between the developer reservoir and the developer supply chamber; anda supply opening that is formed in the casing to allow the developer pass therethrough from the developer supply chamber to the developer carry chamber;a recovery opening that is formed in the casing to allow the developer pass therethrough from the developer carry chamber to the developer supply chamber;an opening that is formed in the casing to allow the developer pass therethrough from the developer carry chamber to the developer reservoir,wherein:the second carry member is provided in the developer carry chamber to supply the developer to the developer reservoir through the opening while carrying, from the supply opening toward the recovery opening, the developer which has been supplied from the developer supply chamber;the first carry member supplies the developer to the developer reservoir through the supply opening while carrying the developer from the recovery opening toward the supply opening; andthe carry substrate is provided on an opposite side of the developer supply chamber on an inner wall of the casing such that the developer which has been carried to the developer reservoir through the opening is carried to the position facing the developer holding body. 9. The development device according to claim 8, wherein the opening is formed to extend throughout the width direction in the developer carry chamber and to face the second carry member. 10. The development device according to claim 8, further comprising an unstiffening member located in the developer reservoir to unstiffen the developer supplied to the developer reservoir through the opening. 11. The development device according to claim 8, wherein the carry substrate comprises a vertical carry part formed to carry the developer in a vertical direction. 12. The development device according to claim 1, further comprising:a first developer carry chamber that is formed on one side in the width direction of the casing in the developer reservoir to allow the developer reservoir and the developer supply chamber to communicate with each other;a second developer carry chamber that is formed on the other side in the width direction of the casing in the developer reservoir to allow the developer reservoir and the developer supply chamber to communicate with each other;a third carry member that is provided in the first developer carry chamber to carry, toward the developer reservoir, the developer which has been carried by the first carry member; anda fourth carry member that is provided in the second developer carry chamber to carry, toward the developer supply chamber, the developer which has been carried by the second carry member,wherein:the second carry member is provided in the developer reservoir; andthe carry substrate is provided on a same side as the developer supply chamber on an inner wall of the casing such that the developer being carried from the first developer carry chamber to the second developer carry chamber is carried to the position facing the developer holding body. 13. The development device according to claim 12, wherein:the first carry member and the second carry member are provided to be parallel with each other along a horizontal direction; andthe third carry member and the fourth carry member are arranged along the horizontal direction along which the first carry member and the second carry member are arranged. 14. The development device according to claim 12, wherein the carry substrate comprises a vertical carry part formed to carry the developer in a vertical direction. 15. The development device according to claim 12, wherein:the inner wall of the casing on which the carry substrate is provided is formed to be straight when viewed as a side view so as to face the second carry member in a horizontal direction; andthe developer is stored in the developer reservoir in a vertical direction such that a top of the developer is situated at a position which is lower than an upper edge of the second carry member and at which the top of the developer faces the inner wall of the casing on which the carry substrate is provided. 16. The development device according to claim 12, whereinthe second carry member comprises a spiral part having a form of a spiral extending in the width direction of the casing; andthe second carry member has a circular shape when viewed as a side view. 17. The development device according to claim 12, further comprising:a supply opening that is formed to allow the first developer carry chamber communicate with the developer reservoir; anda recovery opening that is formed to allow the second developer carry chamber communicate with the developer reservoir;wherein the supply opening and the recovery opening are arranged to be parallel with each other in a horizontal direction. 18. An image forming device, comprising: a image formation unit configured to form an image on a recording medium; anda development device according to claim 1 provided in the image forming unit. 19. The image forming device according to claim 18, wherein the image formation unit comprises:the image holding body provided for each of predetermined colors;the development device provided for each of the image holding bodies; anda transfer target member provided to face each image holding body,wherein a developer image is primarily transferred from each image holding body to the transfer target member, and then the developer image is secondarily transferred from the transfer target member to the recording medium.
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