CN217879989U

CN217879989U - Developing box and processing box

Info

Publication number: CN217879989U
Application number: CN202222264000.5U
Authority: CN
Inventors: 吕金波; 唐良春; 黎清剑
Original assignee: Zhuhai Yuancheng Digital Technology Co ltd
Current assignee: Zhuhai Yuancheng Digital Technology Co ltd
Priority date: 2022-08-27
Filing date: 2022-08-27
Publication date: 2022-11-22
Anticipated expiration: 2032-08-27

Abstract

The utility model relates to a developing box, it is including the casing that is used for holding the developer, be used for the stirring frame, power receiving gear, stirring frame gear and the intermediate gear of developer in the casing. The housing includes a first sidewall and a second sidewall longitudinally opposite the first sidewall. The power receiving gear is located at the first sidewall and is for receiving power from the image forming device. The agitator gear is mounted to an end of the agitator frame at the first side wall. The intermediate gear is located between the power receiving gear and the agitator gear and is used for transmitting power from the power receiving gear to the agitator gear. The stirring frame gear comprises a first gear part and a second gear part which are coaxially arranged, the second gear part is located between the first gear part and the first side wall, and the diameter of the second gear part is larger than that of the first gear part. When the developing cartridge is mounted to the drum cartridge, the second gear portion is located between the first side wall and the pressing member in the longitudinal direction. The utility model discloses development box stirring frame gear is difficult for rocking, and the drive train is more stable. The utility model discloses still relate to a processing box simultaneously.

Description

Developing box and processing box

Technical Field

The utility model relates to a developing box. And simultaneously, the utility model discloses still relate to a processing box who contains the development box.

Background

The process cartridge is an indispensable printing consumable in the laser image forming apparatus. The process cartridge is generally classified into an integrated process cartridge and a split process cartridge. The process cartridge of a separate type includes a developing cartridge in which a developing roller is mounted, and a drum cartridge in which a photosensitive drum is mounted, the developing cartridge being detachably mountable to the drum cartridge. The drum cartridge has a pressing member mounted therein, and the pressing member applies pressure to the developing cartridge to force the developing roller close to the photosensitive drum when the developing cartridge is mounted to the drum cartridge.

Chinese patent document CN106575093A discloses a developing cartridge, which includes a casing, a developing roller mounted on the casing, an agitating frame, and a power train mounted on one side of the casing. The transmission system comprises a plurality of gears such as a power receiving gear, an idle gear, a stirring frame gear and the like. The power receiving gear receives a driving force from the image forming apparatus to drive the idle teeth and the agitator frame gear at the end of the agitator frame. The stirring frame gear includes a large diameter gear portion and a small diameter gear portion, and the small diameter gear portion is located between the large diameter gear portion and the side wall of the housing. When the developing box works, under the condition that the developing agent in the developing box is more, a larger driving force is needed to drive the stirring frame to rotate. Because drive power need be transmitted to the stirring frame gear through the middle idle tooth, transmission path is far away, and the great gear portion of diameter is located the outside, transmits great power and arouses easily that the stirring frame gear rocks, leads to appearing the unstable problem of transmission.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a developing box, prior art can be compared to this kind of developing box, under the condition of the great drive power of transmission, the stirring frame gear is difficult for rocking, and the drive train is more stable.

In order to achieve the above object, the present invention provides a developing cartridge including a casing for accommodating a developer, a stirring rack for stirring the developer inside the casing, a power receiving gear, a stirring rack gear, and an intermediate gear. The housing includes a first sidewall and a second sidewall longitudinally opposite the first sidewall. The power receiving gear is located at the first side wall and is for receiving power from the image forming apparatus. The agitator frame gear is mounted to an end of the agitator frame on the first side wall. The intermediate gear is located between the power receiving gear and the agitator frame gear and is used to transmit power from the power receiving gear to the agitator frame gear. The stirring frame gear comprises a first gear part and a second gear part which are coaxially arranged, the second gear part is located between the first gear part and the first side wall, and the diameter of the second gear part is larger than that of the first gear part. The second gear portion is disposed between the first side wall and the pressing member in the longitudinal direction when the developing cartridge is mounted to the drum cartridge.

Compared with the prior art, the utility model discloses the second gear portion (major diameter gear) of stirring frame gear among the developing box is set up and is close to first lateral wall, and when the more great drive power of needs transmission of developer in the casing, this kind of mode of setting makes the stirring frame gear be difficult for rocking, and the drive train is more stable. And the second gear portion is disposed closer to the second side wall than in the related art in order to avoid interference with the structure on the drum cartridge.

In one embodiment, the first side wall is provided with a groove, and at least a portion of the second gear portion is located within the groove. In this way, the second gear portion is brought closer to the second side wall, thereby avoiding interference with the structure on the drum cartridge.

In one embodiment, the developing cartridge further includes a pressure receiving member provided on the first side wall, the pressure receiving member receiving a pressing force applied by the pressing member when the developing cartridge is mounted to the drum cartridge. In a preferred embodiment, the pressure receiving member includes an extension portion extending parallel to the first side wall with a gap therebetween. The extending part can prevent the second gear part from being not provided with a pressure receiving part when the second gear part is close to the first side wall, and a gap between the extending part and the first side wall can prevent the extending part and the second gear part from being interfered.

In a preferred embodiment, the pressure receiving member is detachably attached to the first side wall. Because hardly find the position that sets up the pressure piece on the first lateral wall, install the pressure piece on first lateral wall with detachable mode, can reduce the manufacturing difficulty on the one hand, on the other hand can reduce the design degree of difficulty of drive train.

The utility model also provides a processing box, it includes development box and drum box, and drum box includes the frame and is located the casting die that applys of frame, and development box is installed to drum box internal time with the detachable mode, and the casting die is applyed to the development box and is compeled thrust. The developing cartridge includes a casing for accommodating a developer, an agitating frame for agitating the developer in the casing, a power receiving gear, an agitating frame gear, and an intermediate gear. The housing includes a first sidewall and a second sidewall longitudinally opposite the first sidewall. The power receiving gear is located at the first sidewall and is for receiving power from the image forming device. The agitator gear is mounted to an end of the agitator frame at the first side wall. The intermediate gear is located between the power receiving gear and the agitator gear and is used for transmitting power from the power receiving gear to the agitator gear. Wherein, the stirring frame gear includes coaxial first gear portion and the second gear portion of setting, and the second gear portion is located between first gear portion and the first lateral wall, and the diameter of second gear portion is greater than the diameter of first gear portion. The second gear portion is disposed between the first side wall and the pressing member in the longitudinal direction when the developing cartridge is mounted to the drum cartridge.

Drawings

Fig. 1 is a schematic perspective view of the process cartridge (with the developing cartridge end cap removed) according to an embodiment of the present invention.

Fig. 2 is a perspective view of the developing cartridge of the present invention according to an embodiment.

Fig. 3 is a perspective view of the developing cartridge shown in fig. 2 with the end cap removed.

Fig. 4 is an exploded view of a power train of the developing cartridge shown in fig. 2.

Fig. 5 is a partial exploded view of another angle of the developing cartridge of the present invention shown in fig. 2.

Fig. 6 is a partial perspective view of another angle of the developing cartridge of the present invention shown in fig. 2.

Fig. 7 is a schematic perspective view of a drum cartridge of the process cartridge according to an embodiment of the present invention.

Fig. 8 is a partially enlarged view of the process cartridge shown in fig. 1.

Detailed Description

The structure and other aspects of the developing cartridge and the process cartridge of the present invention will be described in further detail hereinafter with reference to the accompanying drawings by way of specific embodiments.

As shown in fig. 1, the process cartridge of the present invention includes a developing cartridge 1 and a drum cartridge 2, and the developing cartridge 1 can be detachably mounted to the drum cartridge 2. The process cartridge can be detachably mounted to the image forming apparatus.

As shown in fig. 2 and 3, the developing cartridge 1 of the present invention includes a casing 11, an end cap 12 mounted at one end of the casing 11, a developing roller 13 mounted on the casing, a powder feeding roller, an agitating frame (not shown), and a power train 15. The casing 11 is for accommodating developer and has a first side wall 111 and a second side wall 112, the second side wall 112 being opposed to the first side wall 111 in the longitudinal direction Y of the developing cartridge (axial direction of the developing roller). The end cap 12 is mounted on the first sidewall 111. The drive train 15 is arranged between the first side wall 111 and the end cover 12.

As shown in fig. 4 to 6, the power train 15 further includes a power receiving gear 151, a powder feed roller gear 152, a developing roller gear 153, an intermediate gear 155, an agitation frame gear 156, and a counter gear 157, wherein the powder feed roller gear 152 and the developing roller gear 153 are located substantially on one side of the power receiving gear 151, and the intermediate gear 155, the agitation frame gear 156, and the counter gear 157 are located substantially on the other side of the power receiving gear 151. The power receiving gear 151 receives a driving force from the image forming apparatus and transmits the driving force to gears on both sides thereof. The powder feeding roller gear 152 is fixedly attached to an end of the powder feeding roller shaft 141 and rotates together with the powder feeding roller, and the developing roller gear 153 is attached to an end of the developing roller shaft 131 and rotates together with the developing roller. A fixed shaft 161 and a fixed shaft 171 are provided on the first side wall 111, the intermediate gear 155 is rotatably mounted on the fixed shaft 161, and the counter gear 157 is rotatably mounted on the fixed shaft 171. The agitator gear 156 is fixedly installed at an end of the agitator rotating shaft 181 to rotate together with the agitator. The intermediate gear 155 is located between the power receiving gear 151 and the agitator frame gear 156 along the power transmission path.

In one embodiment, the power receiving gear 151 includes a power receiving port 151a, a pinion gear portion 151b, and a bull gear portion 151c, and the power receiving port 151a cooperates with a driving head on the image forming apparatus to receive driving force from the image forming apparatus. The small gear portion 151b is engaged with the powder feeding roller gear 152, and the large gear portion 151c is engaged with the developing roller gear 153 to transmit the driving force to the developing roller and the powder feeding roller, respectively. The intermediate gear 155 includes a large gear portion 155a having a large diameter and a small gear portion 155b having a small diameter, which are integrally formed, the small gear portion 155b being located between the large gear portion 155b and the first side wall 111 in the longitudinal direction Y of the developing cartridge, the large gear portion 155a being engaged with the small gear portion 151b of the power receiving gear 151. The agitator frame gear 156 includes a large gear portion (second gear portion) 156a having a large diameter and a small gear portion (first gear portion) 156b having a small diameter, which are integrally formed, the large gear portion 156a is located between the small gear portion 156b and the first side wall 111 in the longitudinal direction Y of the developing cartridge, the large gear portion 156a is engaged with the small gear portion 155b of the intermediate gear 155, and the small gear portion 156b is engaged with the counter gear 157.

As shown in fig. 7, the drum cartridge 2 of the process cartridge of the present invention includes a frame 21, a photosensitive drum (not shown) mounted on the frame 21, the photosensitive drum being rotatably mounted on the frame 21, and a pressing member 22 for applying urging force to the developing cartridge 1 when the developing cartridge 1 is mounted to the drum cartridge 2 so as to bring the developing roller 13 close to the photosensitive drum. For details of the pressing member 22, chinese patent document CN106575093A may be mentioned. Accordingly, a pressure receiving member 18 that cooperates with the pressing member 22 is also provided on the first side wall 111 of the developing cartridge 1, and the pressure receiving member 18 is adapted to receive the urging force applied by the pressing member 22.

In the prior art, since the large gear portion of the gear of the stirring frame is located at the outer side, i.e. the small gear portion is located between the large gear portion and the first side wall, a certain gap is formed between the large gear portion and the first side wall. When the developing cartridge 1 is mounted to the drum cartridge 2, the pressing member 22 on the drum cartridge 2 may protrude into the gap between the large gear portion and the first side wall. The invention is created in order to improve the transmission stability of the drive train 15 of the developing cartridge 1, the large gear portion of the stirring rack gear is arranged between the small gear portion and the first side wall, so that the stirring rack gear can be effectively prevented from shaking. Since a large number of drum cartridges using the related art have been sold to consumers, which means that the position of the pressing member 22 on the drum cartridge 2 cannot be changed, designing the large gear portion 156a of the agitator frame gear 156 close to the first side wall 111 faces a problem of interference with the pressing member 22, resulting in that the developing cartridge 1 cannot be mounted into the related drum cartridge 2. The present invention is created to ensure that, when the developing cartridge 1 is mounted to the drum cartridge 2, the large gear portion 156a is located between the first side wall 111 and the pressing member 22 in the longitudinal direction Y of the developing cartridge, as shown in fig. 8.

In a preferred embodiment, in order to ensure that the large gear portion 156a of the agitator frame gear 156 does not interfere with the pressing member 22 when the developing cartridge 1 is mounted to the drum cartridge 2, the first side wall 111 is provided with a groove 111a, and at least a portion of the large gear portion 156a is located within the groove 111 a. By disposing the large gear portion 156a in the groove 111a such that the large gear portion 156a is closer to the second side wall 112, interference of the large gear portion 156a with the pressing member 22 can be avoided. The groove 111a may be shaped such that the pinion gear portion 155b of the intermediate gear 155 is also located within the groove 111 a.

In the related art, since it is to be engaged with the pressing member 22 on the drum cartridge 2, the projection (pressure receiving member) on the first side wall of the developing cartridge 1 is also located in the gap between the large gear portion of the agitator gear and the first side wall. Designing the large gear portion 156a of the agitator gear 156 close to the first side wall 111 faces a problem of interference with the projection (pressure receiving member). If there is a partial overlap between the projection of the protrusion on the first side wall and the projection of the large gear portion 156a on the first side wall, it is necessary to provide a clearance structure on the protrusion so that the portion of the large gear portion 156a interfering with the protrusion is located within the clearance structure.

The provision of the clearance structure in the projection tends to reduce the strength of the projection, and is likely to break when receiving a large urging force. In order to solve the problem, the utility model discloses the position that will receive the pressure piece in the developing box removes towards developing roller 13 direction. In one embodiment, the pressure receiving member 18 of the developing cartridge of the present invention includes an extension portion 181 extending parallel to the first side wall 111, and the end of the extension portion 181 extends to a length such that, when the developing cartridge 1 is properly mounted to the drum cartridge 2, the extension portion 181 can abut against the pressing member 22 on the drum cartridge 2 to receive the urging force from the pressing member 22. A certain gap is provided between the extending portion 181 and the first side wall 111, so that the end face of the large gear portion 156a is located in the gap, as shown in fig. 6, to ensure that the large gear portion 156a does not interfere with the extending portion 181.

Due to the limited space on the first side wall 111, it is difficult to find the placement position of the pressure receiving member. Preferably, the pressure receiving member 18 of the developing cartridge 1 of the present invention is detachably mounted on the first side wall 111, and the pressure receiving member 18 is fixed with the first side wall 111 to become a part of the first side wall. The shaft seat 182 is provided on the pressure receiving member 18, and the power receiving gear 151 is mounted on the shaft seat 182, so that it is not necessary to find a position for disposing the pressure receiving member 18 on the first side wall of the developing cartridge 1, and the difficulty in processing and manufacturing the developing cartridge can be advantageously reduced.

The above embodiments are only used for illustrating the concept and scope of the present invention, and are not used for limiting the protection scope of the present invention. Modifications, equivalents and other improvements which are obvious to those skilled in the art are made to the above-described embodiments and are also within the spirit of the invention. The scope and spirit of the invention are defined by the appended claims.

Claims

1. A developing cartridge detachably mountable to a drum cartridge, the drum cartridge being provided with a pressing member therein, the developing cartridge comprising:

a housing for containing a developer, the housing including a first sidewall and a second sidewall opposite the first sidewall;

a stirring frame for stirring the developer in the casing;

a power receiving gear located at the first sidewall and for receiving power from the image forming apparatus;

a mixing frame gear mounted at an end of the mixing frame located at the first side wall; and

the intermediate gear is positioned between the power receiving gear and the stirring frame gear and is used for transmitting power from the power receiving gear to the stirring frame gear; it is characterized in that the preparation method is characterized in that,

the stirring frame gear comprises a first gear part and a second gear part which are coaxially arranged, the second gear part is positioned between the first gear part and the first side wall, and the diameter of the second gear part is larger than that of the first gear part;

the second gear portion is provided so as to be located between the first side wall and the pressing member in a longitudinal direction of the developing cartridge when the developing cartridge is mounted to the drum cartridge.

2. A developing cartridge according to claim 1, wherein a groove is provided on the first side wall, and at least a part of the second gear portion is located in the groove.

3. A developing cartridge according to claim 1, further comprising a pressure receiving member provided on the first side wall, said pressure receiving member receiving the urging force applied by said pressing member when said developing cartridge is mounted to the drum cartridge.

4. A developing cartridge according to claim 3, wherein said pressure receiving member includes an extended portion extending parallel to said first side wall with a gap therebetween.

5. A developing cartridge according to claim 4, wherein said pressure receiving member is detachably mounted to said first side wall.

6. A process cartridge includes a developing cartridge and a drum cartridge, the drum cartridge including a frame and a pressing member located in the frame, the pressing member applying an urging force to the developing cartridge when the developing cartridge is detachably mounted into the drum cartridge;

the developing cartridge includes:

a stirring frame for stirring the developer in the housing;

a power receiving gear located at the first sidewall and for receiving power from the image forming device;

a mixing frame gear mounted at an end of the mixing frame at the first side wall; and

an intermediate gear located between the power receiving gear and the agitator gear for transferring power from the power receiving gear to the agitator gear; it is characterized in that the preparation method is characterized in that,

7. A process cartridge according to claim 6, wherein a recess is provided in said first side wall, and at least a part of said second gear portion is located in said recess.

8. A process cartridge according to claim 6, further comprising a pressure receiving member provided on the first side wall, said pressure receiving member receiving the urging force applied by said urging member when said developing cartridge is mounted to the drum cartridge.

9. A process cartridge according to claim 8, wherein said pressure receiving member includes an extended portion extending parallel to said first side wall with a gap therebetween.

10. A process cartridge according to claim 9, wherein said pressure receiving member is detachably mounted to said first side wall.