IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0873108
(2004-06-23)
|
우선권정보 |
KR-10-2003-0086250(2003-12-01) |
발명자
/ 주소 |
|
출원인 / 주소 |
- Samsung Electronics Co., Ltd.
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대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
2 인용 특허 :
3 |
초록
▼
A developing cartridge for an electrophotographic image forming apparatus includes, a toner housing, a toner storage chamber, a toner feeding chamber, a feeding roller, a developing roller and a shielding device. One side of the toner housing has an opening, and the toner storage chamber and the ton
A developing cartridge for an electrophotographic image forming apparatus includes, a toner housing, a toner storage chamber, a toner feeding chamber, a feeding roller, a developing roller and a shielding device. One side of the toner housing has an opening, and the toner storage chamber and the toner-feeding chamber communicate with each other through a communication hole. The shielding device is installed within the toner storage chamber so as to move from a shielding position where it shields the communication hole to an opening position where it opens the communication hole. Accordingly, since the shielding member is capable of moving within the toner storage chamber, the user can save trouble of separating and removing the shielding member from the toner housing.
대표청구항
▼
What is claimed is: 1. A developing cartridge for an electrophotographic image forming apparatus, comprising: a toner housing having a toner storage chamber and an opening at one side thereof; a toner-feeding chamber formed between the toner storage chamber and the opening; a communication hole com
What is claimed is: 1. A developing cartridge for an electrophotographic image forming apparatus, comprising: a toner housing having a toner storage chamber and an opening at one side thereof; a toner-feeding chamber formed between the toner storage chamber and the opening; a communication hole communicating between the toner storage chamber and the toner-feeding chamber; a feeding roller included in the toner-feeding chamber; a developing roller included in the opening to contact the feeding roller; and a shielding device included in the toner storage chamber to be moveable from a shielding position, in which the shielding device shields the communication hole, to an open position in which the shielding device opens the communication hole, wherein the shielding device comprises: a rotary shaft rotatably supported at opposite ends by opposite inner lateral walls of the toner housing; a shielding member selectively connected to the rotary shaft to open and close the communication hole; and connecting means for selectively connecting the shielding member to the rotary shaft, wherein when the shielding member is connected to the rotary shaft and cooperates with the rotary shaft in the shielding position the shielding member shields the communication hole, and when the shielding member is released from the cooperation with the rotary shaft in the opening position the shielding member opens the communication hole. 2. The developing cartridge according to claim 1, wherein the shielding member comprises a shielding section shielding the communication hole, and a pair of swivel supporting sections engaged to opposite ends of the shielding section, to be elastically deformable, in which at least one of the swivel supporting sections is provided with a shape-mating hole, wherein the connecting means comprises one shape-mating part provided at one end of the rotary shaft on one of the opposite inner lateral walls of the toner housing and compression projections projected from one of the inner lateral walls of the toner housing, and wherein the swivel supporting sections are elastically deformed by the compression projections, and the shape-mating hole is mated with the shape-mating part, thereby being connected to the rotary shaft in the shielding position, and the shape-mating hole is disengaged from the shape-mating part if the swivel supporting sections swivel in cooperation with the rotary shaft and elastically return to the original form, thereby breaking away from the compression projections at the opening position. 3. The developing cartridge according to claim 2, wherein at least one of the opposite inner lateral walls of the toner housing is provided with a fixing projection in order to prevent the swivel supporting sections from being rotated from a state in which the swivel supporting sections break away from the rotary shaft. 4. The developing cartridge according to claim 2, further comprising an agitator connected to the rotary shaft. 5. The developing cartridge according to claim 1, wherein the shielding member comprises a shielding section shielding the communication hole, and a pair of swivel supporting sections engaged to opposite ends of the shielding section, to be elastically deformable, in which at least one of the swivel supporting sections is provided with a shape-mating hole, wherein the connecting means comprises a pair of shape-mating parts provided at opposite ends of the rotary shaft to be spaced from the opposite inner lateral walls of the toner housing, and compression projections projected from the inner lateral walls of the toner housing, and wherein the swivel supporting sections are elastically deformed by the compression projections, and the shape-mating holes are mated with the shape-mating parts, thereby being connected to the rotary shaft in the shielding position, and the shape-mating holes are disengaged from the shape-mating parts if the swivel supporting sections swivel in cooperation with the rotary shaft and elastically return to the original form, thereby breaking away from the compression projections at the opening position. 6. The developing cartridge according to claim 5, wherein at least one of the opposite inner lateral walls of the toner housing is provided with a fixing projection in order to prevent the swivel supporting sections from being rotated from a state where the swivel supporting sections break away from the rotary shaft. 7. The developing cartridge according to claim 5, further comprising an agitator connected to the rotary shaft. 8. The developing cartridge according to claim 1, further comprising: a restraint blade installed at the opening of the toner housing to shield a part of the opening along with the developing roller; and a shielding membrane installed at the opening of the toner housing to shield a remaining part of the opening along with the developing roller. 9. The developing cartridge according to claim 1, further comprising: a photosensitive drum housing connected to the toner housing having the opening; a photosensitive drum installed within the photosensitive drum housing to be fed with toner through the developing roller; and an electrification roller installed within the photosensitive drum housing to electrify the photosensitive drum. 10. A developing cartridge for an electrophotographic image forming apparatus, comprising: a toner housing having a toner storage chamber and an opening at one side thereof; a toner-feeding chamber formed between the toner storage chamber and the opening; a communication hole communicating between the toner storage chamber and the toner-feeding chamber; a feeding roller included in the toner-feeding chamber; a developing roller included in the opening to contact the feeding roller; and a shielding device included in the toner storage chamber to be moveable from a shielding position, in which the shielding device shields the communication hole, to an open position in which the shielding device opens the communication hole, wherein the shielding device comprises: a guide wall installed in the toner storage chamber so that a guide slot is formed between an inner front wall of the toner housing and the guide wall; and a shielding member installed to vertically move along the guide slot, wherein the shielding member comprises: a shielding section for shielding the communication hole; and a head section provided at a top of the shielding section, the head section being arranged so that it is latched onto at least one of the inner front wall and the guide wall in the opening position where the communication hole is opened as the shielding section is upwardly moved along the guide slot. 11. The developing cartridge according to claim 10, wherein one side of the toner housing is formed with a throughhole, and an operation cable is connected to the head section, the operation cable being exposed to the outside of the toner housing through the through hole. 12. The developing cartridge according to claim 11, wherein a sealing member is provided on at least one of an inner and outer portions of the toner housing to seal the throughhole. 13. The developing cartridge according to claim 10, wherein an agitator is installed within the toner storage chamber. 14. A cartridge comprising: a toner housing comprising a toner storage chamber and a toner feeding chamber, the toner storage chamber having an opening at one side thereof; a communication hole communicating the toner storage chamber with the toner feeding chamber; and a guarding device located in the toner storage chamber moveable from a guarding position closing the communication hole to an open position opening the communication hole, wherein the guarding device comprises: a rotary shaft rotatably supported at opposite ends by inner lateral walls of the toner housing; and a guarding member connected to the rotary shaft to open and close the communication hole; and a connector connecting the guarding member to the rotary shaft. 15. The cartridge according to claim 14, wherein the guarding member comprises a guarding section for guarding the communication hole, and a pair of swivel supporting sections engaged to opposite ends of the guarding section, to be elastically deformable, in which at least one of the swivel supporting sections is provided with a shape-mating hole, wherein the connector comprises one shape-mating part provided at one end of the rotary shaft and compression projections projecting from one of the inner lateral walls of the toner housing, and wherein the swivel supporting sections are elastically deformed by the compression projections, and the shape-mating hole is mated with the shape-mating part, thereby being connected to the rotary shaft in the guarding position, and the shape-mating hole is disengaged from the shape-mating part if the swivel supporting sections swivel in cooperation with the rotary shaft and elastically return to the original form, thereby breaking away from the compression projections at the opening position. 16. The cartridge according to claim 15, wherein at least one of the opposite inner lateral walls of the toner housing is provided with a fixing projection in order to prevent the swivel supporting sections from being rotated from a state where the swivel supporting sections break away from the rotary shaft. 17. The cartridge according to claim 15, further comprising an agitator connected to the rotary shaft. 18. The cartridge according to claim 14, wherein the guarding member comprises a guarding section for covering the communication hole, and a pair of swivel supporting sections engaged to opposite ends of the guarding section, to be elastically deformable, in which at least one of the swivel supporting sections is provided with a shape-mating hole, wherein the connector comprises a pair of shape-mating parts provided at opposite ends of the rotary shaft to be spaced from the inner later walls of the toner housing, and compression projections projecting from the inner lateral walls of the toner housing, and wherein the swivel supporting sections are elastically deformed by the compression projections, and the shape-mating holes are mated with the shape-mating parts, thereby being connected to the rotary shaft in the guarding position, and the shape-mating holes are disengaged from the shape-mating parts if the swivel supporting sections swivel in cooperation with the rotary shaft and elastically return to the original form, thereby breaking away from the compression projections at the opening position. 19. The cartridge according to claim 18, wherein at least one of the inner lateral walls of the toner housing is provided with a fixing projection to prevent the swivel supporting sections from being rotated from a state where the swivel supporting sections breaks away from the rotary shaft. 20. The cartridge according to claim 18, further comprising an agitator connected to the rotary shaft. 21. The cartridge according to claim 14, further comprising: a restraint blade installed at the opening of the toner housing to close a part of the opening along with a developing roller; and a guarding membrane installed at the opening of the toner housing to close a remaining part of the opening along with the developing roller. 22. The cartridge according to claim 14, further comprising: a photosensitive drum housing connected to the toner housing; a photosensitive drum installed within a photosensitive drum housing to be fed with toner through a developing roller; and an electrification roller installed within the photosensitive drum housing to electrify the photosensitive drum. 23. A cartridge comprising: a toner housing comprising a toner storage chamber and a toner feeding chamber, the toner storage chamber having an opening at one side thereof; a communication hole communicating the toner storage chamber with the toner feeding chamber; and a guarding device located in the toner storage chamber moveable from a guarding position closing the communication hole to an open position opening the communication hole, wherein the shielding device comprises: a guide wall installed in the toner storage chamber so that a guide slot is formed between an inner front wall of the toner housing and the guide wall; and a guarding member installed to vertically move along the guide slot, wherein the guarding member comprises: a guarding section closing the communication hole; and a head section provided at a top of the guarding section, the head section being arranged so that it is latched onto at least one of the inner front wall and the guide wall in the opening position where the communication hole is opened as the guarding section is upwardly moved along the guide slot. 24. The cartridge according to claim 23, wherein one side of the toner housing is formed with a through hole, and an operation cable is connected to the head section, the operation cable being exposed to the outside of the toner housing through the through hole. 25. The cartridge according to claim 24, wherein a sealing member is provided on at least one of an inner and outer portions of the toner housing to seal the through hole. 26. The cartridge according to claim 23, wherein an agitator is installed within the toner storage chamber.
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