CN221326937U - Developing cartridge - Google Patents

Abstract

The developing box provided by the utility model is detachably arranged on a photosensitive assembly provided with a photosensitive member, wherein the photosensitive member is arranged along the length direction of the photosensitive assembly; the photosensitive assembly also comprises a holding part; the developing box comprises a shell, a developing piece and a cavity, wherein the developing piece is arranged along the length direction of the shell, and the cavity is used for accommodating developer; the developing cartridge further includes a held portion provided separately from the housing; the held portion is engaged with a holding portion of the photosensitive assembly when the developing cartridge is mounted into the photosensitive assembly; the developing box also comprises a sealing part which is matched with the powder filling port and seals the powder filling port; the sealing part and the held part are integrally formed, so that the structure of the developing box can be simplified, the number of parts of the developing box is reduced, and the developing box is simpler to assemble.

Description

Developing cartridge

Technical Field

The present utility model relates to the field of electrophotographic image forming, and more particularly, to a developing cartridge detachably mountable to an electrophotographic image forming apparatus.

Background

The developing cartridge is a consumable product used in an image forming apparatus such as a laser printer or a copier in which a developer required for image formation is stored, and in operation, a driving force receiving member in the developing cartridge receives a driving force from the image forming apparatus, and a powder feeding member for supplying the developer to a surface of the developing member for supplying the developer to a surface of a photosensitive member on which an electrostatic latent image is formed and the developing member mounted in the developing cartridge are rotated at a predetermined speed in a predetermined direction, so that the electrostatic latent image is developed.

For example, when the developing cartridge of the related art is required to be mounted in an image forming apparatus, it is required to be mounted in advance on one photosensitive member. The photosensitive assembly comprises a photosensitive member rotatably arranged on the photosensitive assembly, the photosensitive member is arranged along the length direction of the photosensitive assembly, and the photosensitive assembly is detachably arranged in the imaging device. When the developing cartridge is mounted to the photosensitive member, the developing cartridge is engaged with the photosensitive member so as to receive a urging force from the photosensitive member assembly, so that a surface of a developing member provided in the developing cartridge is brought into contact with the surface of the photosensitive member.

The developing cartridge in the prior art further includes a housing in which a cavity for accommodating the developer is provided. In general, when the developer in the developing cartridge is exhausted, the user needs to replace the developing cartridge with a new one. The prior art also provides a developing box, wherein a powder filling opening capable of filling new developer is formed in the shell. In order to achieve these functions, a large number of parts are required to be provided on the developing cartridge, complicating the assembly of the developing cartridge.

Disclosure of utility model

The embodiment of the developing box provided by the utility model can simplify the structure of the developing box, reduce the number of parts of the developing box and enable the assembly of the developing box to be simpler.

Specifically, the developing cartridge provided by the utility model is detachably mounted on a photosensitive assembly provided with a photosensitive member, wherein the photosensitive member is arranged along the length direction of the photosensitive assembly; the photosensitive assembly also comprises a holding part; the developing box comprises a shell, a developing piece and a cavity, wherein the developing piece is arranged along the length direction of the shell, and the cavity is used for accommodating developer; the developing cartridge further includes a held portion provided separately from the housing; the held portion is engaged with a holding portion of the photosensitive assembly when the developing cartridge is mounted into the photosensitive assembly; the developing box also comprises a sealing part which is matched with the powder filling port and seals the powder filling port; the seal part and the held part are integrally formed.

Further, the powder filling port is arranged on one side of the shell along the length direction of the developing box.

Further, the developing cartridge further includes a third side plate connected to the housing, the third side plate including the sealing portion and the held portion.

Further, the third side plate further comprises a fixing portion, and the third side plate is connected with the shell through the fixing portion.

Further, the third side plate further includes a third main body portion, and the sealing portion and the held portion extend from the third main body portion and are disposed on opposite sides of the third main body portion, respectively.

Further, the developing cartridge further includes a second side plate detachably connected to the housing, the second side plate being engaged with the developing member and supporting the developing member.

Further, the second side plate is made of a conductive material and is electrically connected to the developing member.

Further, in the longitudinal direction of the developing cartridge, the projection of the third side plate does not overlap with the projection of the second side plate.

Further, the second side plate is provided with a first overlapping part, and the third side plate is provided with a second overlapping part; in the longitudinal direction of the developing cartridge, the projection of the first overlapping portion and the projection of the second overlapping portion overlap, and the first overlapping portion is closer to the casing than the second overlapping portion.

In the developing cartridge according to the present utility model, the projection of the seal portion and the projection of the held portion overlap at least partially in the longitudinal direction of the developing cartridge.

The utility model also provides a developing box, wherein in the length direction of the developing box, the projection of the powder filling opening is overlapped with the projection of the held part at least partially.

Drawings

Fig. 1 is a perspective view of a developing cartridge provided by the present utility model.

Fig. 2 is a partial view of the drive end of a developing cartridge provided by the present utility model.

Fig. 3 is a partial view of a conductive end of a developing cartridge provided by the present utility model.

Fig. 4 is a side view of a developing cartridge according to the present utility model, as viewed along the length of the developing cartridge, when the developing member is in contact with the photosensitive member.

Fig. 5 is an exploded view of a portion of the components of the conductive end of a developer cartridge provided by the present utility model.

Fig. 6 is a side view of a developing cartridge according to the present utility model, as viewed along the length of the developing cartridge, when the developing cartridge is locked in the photosensitive assembly.

Fig. 7 is a side view of a developing cartridge provided with another forced pushing portion as viewed along the length of the developing cartridge.

Detailed Description

Embodiments of the present utility model are described in detail below with reference to the accompanying drawings.

Fig. 1 is a perspective view of a developing cartridge provided by the present utility model. The developing cartridge 10 includes a housing 11, the housing 11 being provided with a cavity to accommodate developer. The developing cartridge 10 further includes a developing member 12, and the developing member 12 extends in a longitudinal direction (X direction shown) of the developing cartridge 10 and is rotatably provided on a casing 11 of the developing cartridge. The developing member 12 has an axis L1, and the axis L1 is parallel to the longitudinal direction X of the developing cartridge.

Further, the developing cartridge 10 has both sides in the longitudinal direction. A driving force receiving member for receiving a rotational driving force in cooperation with a driving member provided in the image forming apparatus is provided on one side thereof, and a conductive member which is electrically connectable with a conductive member in the image forming apparatus and transmits electric power is provided on the other side thereof. For convenience of description of the embodiment of the developing cartridge provided by the present utility model, a side where the driving force receiving member is located is referred to as a driving end conductive member is referred to as a conductive end.

Before the developing cartridge is mounted to the image forming apparatus, it is necessary to mount the developing cartridge onto the photosensitive assembly and then into the image forming apparatus through the photosensitive assembly; the developing box is arranged along the length direction of the photosensitive assembly; the photosensitive assembly is provided with a pushing part for pushing the developing box, and correspondingly, the developing box is provided with a pushed part for receiving the pushing force exerted by the pushing part. Further, the forced pushing part comprises a first forced pushing part and a second forced pushing part which are arranged at two sides of the length direction of the photosensitive assembly, and correspondingly, the two sides of the length direction of the developing box are also respectively provided with a first forced pushing part and a second forced pushing part which are respectively matched with the first forced pushing part and the second forced pushing part, so that the stress of the developing box can be balanced.

Fig. 2 is a partial view of the drive end of a developing cartridge provided by the present utility model.

Specifically, as shown in fig. 2, a driving force receiving member 14 is provided on the driving end, and the driving force receiving member 14 is rotatably provided with respect to the housing 12 and is adapted to receive a rotational driving force in combination with a driving member of an image forming apparatus. The driving force receiving member 14 has an axis L2, and the axis L2 is disposed in parallel with the axis L1 of the developing member 12. Meanwhile, the driving end is further provided with a first side plate 15, the first side plate 15 comprises a first forced pushing part 151L and a first main body part 152, and the first forced pushing part 151L extends from the first main body part 152 along the length direction of the developing cartridge 10; the first forced pushing portion 151L may receive the forced pushing force from the first forced pushing portion provided in the photosensitive assembly when the developing cartridge is mounted in the photosensitive assembly.

Fig. 3 is a partial view of a conductive end of a developing cartridge provided by the present utility model.

Specifically, as shown in fig. 3, a second side plate 16 is disposed on the conductive end of the developing cartridge 10, the second side plate 16 includes a second forced pushing portion 161R and a second main body portion 162, and the second forced pushing portion 161R extends from the second main body portion 162 along the length direction of the developing cartridge 10; the second pushing portion 161R receives the pushing force from the second pushing portion of the photosensitive assembly when the developing cartridge 10 is mounted to the photosensitive assembly.

Further, the first and second urging portions act on the first and second forced pushing portions 151L and 161R, respectively, in a direction intersecting the longitudinal direction of the developing cartridge 10; preferably, the first and second pushing portions act on the first and second pushed portions 151L and 161R, respectively, in a direction perpendicular to the length direction of the developing cartridge 10, and bring the surface of the developing member 12 closer to the surface of the photosensitive member 21 in the photosensitive assembly. In this way, the urging force can be made to act more stably on the developing member 12 by the first urging portion 151L and the second urging portion 161R.

Fig. 4 is a side view of a developing cartridge according to the present utility model, as viewed along the length of the developing cartridge, when the developing member is in contact with the photosensitive member. Specifically, as shown in fig. 4, a second forced pushing portion 161R is disposed on the conductive end of the developing cartridge 10, and when the developing cartridge 10 is mounted in the photosensitive assembly, the second forced pushing portion 22 disposed in the photosensitive assembly acts on the second forced pushing portion 161R by the force of the forced pushing force F under the action of the elastic member 23, and makes the surface of the developing member 12 approach the surface of the photosensitive member 21 in the photosensitive assembly; further, at least a portion of the second forced pushing portion 161R, at least a portion of the second forced pushing portion 22, and at least a portion of the elastic member 23 are all made of conductive materials, and the second forced pushing portion 161R is electrically connected to the conductive element in the image forming apparatus and transmits electric power through the second forced pushing portion 22 and the elastic member 23; further, in the embodiment of the developing cartridge provided by the present utility model, the second forced pushing portion 161R is shaped as a triangular cylinder, and when viewed along the length direction of the developing cartridge 10, the direction of the acting force F of the second forced pushing portion 22 of the photosensitive assembly to the second forced pushing portion 161R of the developing cartridge 10 passes through the center P1 of the cross section of the triangular cylinder and intersects with the axis L1 of the developing member 12; the cross section of the triangular cylinder is triangular, preferably an equilateral triangle or isosceles triangle, cut in a direction perpendicular to the longitudinal direction of the developing cartridge 10; the application point P2 of the pushing force F falls on the edge of the triangular column, that is, the contact position of the second pushed portion 161R and the second pushed portion is the edge of the triangular column. In this way, the second forced pushing portion 161R has a small force receiving surface, the forced pushing force F acts more intensively and stably on the second forced pushing portion 161R, and the developing member 12 is brought into contact with the photosensitive member 21 more stably.

Also, in the embodiment of the developing cartridge provided by the present utility model, the direction in which the first forced pushing portion 151L provided on the driving end of the developing cartridge 10 is forced is consistent with that of the conductive end, the first forced pushing portion 151L is preferably provided in a triangular cylinder shape, and the forced pushing force of the first forced pushing portion provided in the photosensitive assembly acts on the developing member 12 through the first forced pushing portion 151L and brings the surface of the developing member 12 close to the surface of the photosensitive member 21. The direction of the urging force passes through the center of the triangular cross section of the triangular cylinder (first urging portion 151L) and intersects the axis L1 of the developing member 12, and the triangular cylinder is cut in a direction perpendicular to the longitudinal direction of the developing cartridge 10, and the cross section thereof is triangular, preferably equilateral triangle or isosceles triangle.

When the developing cartridge 10 is mounted to the photosensitive member holder, the axis L1 of the developing member 12 is in a state of being substantially parallel to the axis L3 of the photosensitive member 21; in order to make the surfaces of the developing member 12 and the photosensitive member 21 more stably contact, it is preferable that the direction of the urging force F also intersect the axis L3 of the photosensitive member 21.

The second side plate 16 is installed along a length direction of the developing cartridge 10 and connected to the housing 11; further, the second side plate 16 is integrally formed of a conductive material, that is, the second side plate 16 may be used as a conductive member, contact with the developing member 11, and cooperate with a conductive member in the image forming apparatus to transfer electric power, and at this time, the conductive member 16 and the second forced pushing portion 161R are integrally formed, so that the structure of the developing cartridge 10 may be simplified, the number of parts may be reduced, and the assembly of the developing cartridge 10 may be simplified.

Further, the first side plate 15 is used for supporting one end of the developing member 12, and the second side plate 16 is used for supporting the other end of the developing member 12 and limiting the movement of the developing member 12 in the axial direction thereof; meanwhile, the urging forces of the first urging portion and the second urging portion act on the developing member 12 through the first urged portion 151L provided on the first side plate 15 and the second urged portion 161R provided on the second side plate 16, and bring the surface of the developing member 12 into more stable contact with the surface of the photosensitive member 21.

Fig. 5 is an exploded view of a portion of the components of the conductive end of a developer cartridge provided by the present utility model.

The developing box 10 provided by the utility model is provided with a cavity for containing developer in the shell 11, a powder filling port capable of filling the developer into the cavity is formed in the shell 11, and the developing box further comprises a sealing part for sealing the powder filling port. The powder filling port can be arranged at any position on the developing box shell, which can be communicated with the cavity. Specifically, as shown in fig. 5, the casing 11 of the developing cartridge 10 is provided with a powder filling opening 111, the developing cartridge 10 further includes a sealing portion 171, and the sealing portion 171 is detachably engaged with the powder filling opening 111. Preferably, in the embodiment provided by the present utility model, the powder filling port 111 is opened at one side of the casing 11 along the length direction of the developing cartridge 10; further, the developing cartridge 10 provided by the utility model has the powder filling port 111 formed at the conductive end of the developing cartridge 10. Since the size of the developing box along the length direction is longer than the sizes of the developing box along other directions, the powder filling port is arranged at the side end of the developing box, so that the developing box has the following beneficial effects; specifically, when the powder filling opening 111 of the developing cartridge 10 is placed upward (the upper direction is the direction opposite to the gravity direction), and developer is injected into the cavity of the developing cartridge from the upper direction to the lower direction (the gravity direction), the developer gradually fills the cavity from the lower direction to the upper direction under the action of gravity, and the developer is not easy to accumulate at the powder filling opening 111; before the filling is completed, the developer cavity does not need to be rocked, and the developer can be prevented from flying out of the cavity.

Further, the cooperation of the developing cartridge and the photosensitive member will be described with reference to fig. 6.

Fig. 6 is a side view of a developing cartridge according to the present utility model, as viewed along the length of the developing cartridge, when the developing cartridge is locked in the photosensitive assembly. Fig. 6 shows only a schematic view of the holding portion 22 provided in the photosensitive assembly.

As shown in fig. 6, the developing cartridge 10 is mounted in the photosensitive assembly, the photosensitive assembly is further provided with a holding portion 22, the developing cartridge 10 is provided with a held portion 172, and when the developing cartridge 10 is mounted in the photosensitive assembly, the holding portion 22 cooperates with the held portion 172 to lock the developing cartridge 10 in the photosensitive assembly. The vibration generated when the imaging device transmits the rotation power to the developing box during working can be avoided to influence the stability of the matching of the developing box and the photosensitive assembly.

Further, as shown in fig. 5, in a preferred embodiment of the present utility model, the sealing portion 171 and the held portion 172 are integrally formed, that is, the third side plate 17; at least a sealing portion 171 and a held portion 172 are provided on the third side plate 17; the third side plate 17 further includes a third body portion 173, and the sealing portion 171 and the held portion 172 extend from the third body portion 173; specifically, the sealing portion 171 and the held portion 172 are provided on opposite sides of the third main body portion 173, respectively; further, when the third side plate 17 is attached to the developing cartridge 10 and connected to the casing 11, the sealing portion 171 extends from the third main body portion 173 of the third side plate 17 toward the inside of the cavity in the longitudinal direction of the developing cartridge, and the held portion 172 extends from the third main body portion 173 of the third side plate 17 in a direction opposite to the extending direction of the sealing portion 171. The third side plate 17 is detachably connected to the housing 11, and the present utility model provides a preferred embodiment in which the third side plate 17 is disposed at one side of the housing 11 in the length direction. The third side plate 17 may also be configured to be connected to other positions of the housing 11, such as when the position of the powder filling port 111 is changed, and the installation position of the third side plate 17 may be adjusted accordingly. The sealing part 171 and the held part 172 are integrally formed, which has the advantage of reducing the number of parts of the developing cartridge 10 and making the assembly of the developing cartridge simpler; the seal portion 171 is provided integrally with the held portion 172, and the strength of the seal portion 171 can be enhanced and the stability of the seal portion 171 can be improved.

Further, in the developing cartridge provided by the present utility model, an embodiment is that the third side plate 17 is provided such that the projection of the third side plate 17 does not overlap with the projection of the second side plate 16 in the longitudinal direction of the developing cartridge 10; in another embodiment, in the length direction of the developing cartridge 10, the projection of the third side plate 17 at least partially overlaps the projection of the second side plate 16, specifically, the second side plate 16 is provided with a first overlapping portion, and the third side plate 17 is provided with a second overlapping portion; in the longitudinal direction of the developing cartridge, the projection of the first overlapping portion and the projection of the second overlapping portion overlap, the first overlapping portion being closer to the casing 11 than the second overlapping portion; the second side plate 16 is mounted on the developing cartridge 10, and the dismounting and mounting of the third side plate 17, that is, the dismounting of the third side plate 17 from the developing cartridge, is not required, and the operation steps of the user can be reduced.

Further, as shown in fig. 6, the projection of the seal portion 171 overlaps at least a part of the projection of the held portion 172 or the projection of the filling port 111 overlaps at least a part of the projection of the held portion 172 when viewed in the longitudinal direction of the developing cartridge 10. The arrangement has the advantage that the structure of the photosensitive assembly or the developing box can be more compact. The third side plate 17 further includes a fixed portion 174, and the fixed portion 174 is engaged with the housing 11 of the developing cartridge and causes the third side plate 17 to be fixed to the housing 11 of the developing cartridge 10.

The second side plate 16 and the third side plate 17 are disposed on the same side of the housing 11 of the developing cartridge 10, and may be separately disposed or integrally formed.

Fig. 7 is a side view of a developing cartridge provided with another forced pushing portion as viewed along the length of the developing cartridge. Specifically, the shapes of the first forced pushing portion 151L provided on the first side plate 15 and the two forced pushing portions 161R provided on the second side plate 16 may be changed into half cylinders.

As shown in fig. 7, taking the second forced pushing portion as an example, the second forced pushing portion 161R 'is disposed on the second side plate 16' and is configured in a semi-cylindrical shape; the thrust F of the thrust part in the photosensitive assembly acts on the side surface P2' of the semi-cylinder; the half cylinder is sectioned in a direction perpendicular to the longitudinal direction of the developing cartridge 10, and has a semicircular cross section, and the direction of the urging force F passes through the center P1' of the semicircular cross section and intersects with the axis L1 of the developing member 12. The first forced pushing part and the second forced pushing part can be simultaneously set to be in the shape of a triangular cylinder or in the shape of a semi-cylinder, or one of the first forced pushing part and the second forced pushing part can be set to be in the shape of the triangular cylinder, and the other one of the first forced pushing part and the second forced pushing part can be set to be in the shape of the semi-cylinder. Further, the direction of the urging force F also intersects with the axis L3 of the photosensitive member 21.

Claims (10)

1. A developing cartridge detachably mounted to a photosensitive assembly provided with a photosensitive member disposed along a length direction of the photosensitive assembly; the photosensitive assembly also comprises a holding part;

The developing box comprises a shell, a developing piece and a cavity, wherein the developing piece is arranged along the length direction of the shell, and the cavity is used for accommodating developer; the developing cartridge further includes a held portion provided separately from the housing; the held portion is engaged with a holding portion of the photosensitive assembly when the developing cartridge is mounted into the photosensitive assembly;

The developing box also comprises a sealing part which is matched with the powder filling port and seals the powder filling port;

The method is characterized in that: the seal part and the held part are integrally formed.

2. The developing cartridge according to claim 1, wherein the powder filling port is provided on one side of the casing in a longitudinal direction of the developing cartridge.

3. The developing cartridge according to claim 1, further comprising a third side plate connected to the housing, the third side plate including the sealing portion and the held portion.

4. A developing cartridge according to claim 3, wherein said third side plate further includes a fixing portion, and said third side plate is connected to said housing through said fixing portion.

5. A developing cartridge according to claim 3, wherein said third side plate further includes a third main body portion, and said sealing portion and said held portion extend from said third main body portion and are provided on opposite sides of said third main body portion, respectively.

6. A developing cartridge according to claim 3, further comprising a second side plate detachably connected to said housing, said second side plate cooperating with said developing member and supporting said developing member.

7. The developing cartridge according to claim 6, wherein the second side plate is made of a conductive material and is electrically connected to the developing member.

8. The developing cartridge according to claim 6, wherein a projection of the third side plate does not overlap with a projection of the second side plate in a longitudinal direction of the developing cartridge.

9. The developing cartridge according to claim 6, wherein the second side plate is provided with a first overlapping portion, and the third side plate is provided with a second overlapping portion; in the longitudinal direction of the developing cartridge, the projection of the first overlapping portion and the projection of the second overlapping portion overlap, and the first overlapping portion is closer to the casing than the second overlapping portion.

10. A developing cartridge according to any one of claims 1-9, wherein in a longitudinal direction of the developing cartridge, a projection of said sealing portion or said toner filling port overlaps at least a part of a projection of said held portion.