CN218974788U

CN218974788U - Processing box

Info

Publication number: CN218974788U
Application number: CN202223534923.4U
Authority: CN
Inventors: 胡亮亮
Original assignee: Jiangxi Yibo Electronic Technology Co Ltd
Current assignee: Jiangxi Yibo Electronic Technology Co Ltd
Priority date: 2022-01-19
Filing date: 2022-12-29
Publication date: 2023-05-05
Anticipated expiration: 2032-12-29

Abstract

A process cartridge detachably mountable to an electrophotographic image forming apparatus, the process cartridge includes: a photosensitive drum; a developing roller contactable with and separable from the photosensitive drum; a separation force receiving member for receiving an urging force from the electrophotographic image forming apparatus to separate the developing roller from the photosensitive drum; a power receiving member for receiving the rotational force from the electrophotographic image forming apparatus and rotatable about a first axis extending in an axial direction; a power transmitting member engageable with the power receiving member and rotatable about the first axis, and capable of transmitting a rotational force to the developing roller; a separation cam movable by the pushing force received by the separation force receiving member; the power transmission member is slidably disengaged from the power receiving member at least in a radial direction perpendicular to the axial direction in response to movement of the separation cam.

Description

Processing box

Technical Field

The present utility model relates to the field of electrophotographic imaging, and more particularly to a process cartridge.

Background

In the prior art, a process cartridge is disclosed, which is detachably mounted in an electrophotographic image forming apparatus, the process cartridge comprising a housing which can accommodate a developer, a developing roller which can carry the developer, a photosensitive drum which can generate an electrostatic latent image, and a toner discharging blade which is abutted against the developing roller and can control a thickness of the developer layer fed onto the developing roller, the developing roller and the photosensitive drum being rotatably supported on the housing; when the processing box works (namely, during image forming), the developing roller is contacted with the photosensitive drum, so that the developer on the outer surface of the developing roller can be conveyed to the photosensitive drum to develop the electrostatic latent image on the photosensitive drum, a visualized image is formed on the photosensitive drum after development, and then the image is transferred to paper, namely, the printing process is completed; when the process cartridge is not in operation (i.e., during non-image formation), the developing roller is separated from the photosensitive drum, so that the developing roller is prevented from being deformed due to contact and extrusion of the photosensitive drum for a long time, and substances on the surface of the developing roller are prevented from being precipitated and attached to the photosensitive drum to pollute the photosensitive drum.

Although the developing roller and the photosensitive drum can be separated from each other during the non-operation of the process cartridge to prevent the developing roller from being deformed and contaminating the photosensitive drum, the developing roller gear connected to one end of the developing roller in the longitudinal direction and other rotating parts still continuously rotate at this time, so that the continuously rotating developing roller always rubs with the powder discharging knife during the non-operation of the process cartridge, which accelerates the wearing speed of the developing roller and shortens the service life of the developing roller.

Disclosure of Invention

In order to solve the problems, the utility model provides a novel processing box, which is mainly realized by the following technical scheme:

a process cartridge detachably mountable to an electrophotographic image forming apparatus, said process cartridge comprising:

a photosensitive drum;

a developing roller contactable with and separable from the photosensitive drum;

a separation force receiving member for receiving an urging force from the electrophotographic image forming apparatus to separate the developing roller from the photosensitive drum;

a power receiving member for receiving the rotational force from the electrophotographic image forming apparatus and rotatable about a first axis extending in an axial direction;

a power transmitting member engageable with the power receiving member and rotatable about the first axis, and capable of transmitting a rotational force to the developing roller;

a separation cam movable by the pushing force received by the separation force receiving member;

the power transmission member is slidably disengaged from the power receiving member at least in a radial direction perpendicular to the axial direction in response to movement of the separation cam.

Further, the power transmission member includes a first power transmission portion and a second power transmission portion disposed crosswise, the first power transmission portion being engageable with the power receiving member, the second power transmission portion being receivable of the urging force of the separation cam to disengage the first power transmission portion from the power receiving member.

Further, the first power transmission portion and the second power transmission portion are each configured as a lever.

Further, the extending direction of the second power transmission portion is inclined from the axial direction.

Further, the first power transmission portion and the second power transmission portion are integrally formed.

Further, the first power transmission portion and the second power transmission portion are provided separately.

Further, at least one of the first power transmission portion and the second power transmission portion is provided with a forced pushing inclined surface, and the second power transmission portion can force the first power transmission portion to slide in the radial direction.

Further, the power transmission member is provided in plural, and the plural power transmission members are arranged at intervals in the rotation direction of the power transmission member.

Further, the process cartridge may further include a spring coupled to the power transmission member, and the elastic force generated by the spring may maintain the power transmission member in a position engaged with the power receiving member when the process cartridge is not subjected to an external force.

The utility model further develops the prior art, provides a novel clutch mechanism with a non-gear structure, and can realize the state conversion between disconnecting the power connection with the power receiving part and receiving the power of the power receiving part through the state conversion of the contact and separation of the developing roller and the photosensitive drum when the printing work is not executed, so that the rotating parts such as the developing roller and the like can stop rotating, the technical effect of clutch is achieved, the wearing speed of the parts such as the developing roller and the like when the printing work is not executed by the processing box is reduced, the service life of the parts such as the developing roller and the like is prolonged, the separation structure is simpler, and the meshing and the disengaging processes of the power transmitting part and the power receiving part are more stable.

Drawings

FIG. 1 is a schematic view of an electrophotographic image forming apparatus of the prior art;

FIG. 2 is a schematic diagram of a power take-off of an electrophotographic image forming apparatus of the prior art;

FIG. 3 is a schematic view of a process cartridge in embodiment 1 of the present utility model;

FIG. 4 is an exploded view of the process cartridge in embodiment 1 of the present utility model;

FIG. 5 is an enlarged partial schematic view of the part C in FIG. 3 in example 1 of the present utility model;

fig. 6 is a schematic view of a developing cartridge in embodiment 1 of the present utility model;

fig. 7 is an exploded view of a separation assembly of the developing cartridge in embodiment 1 of the present utility model;

FIG. 8 is a schematic cross-sectional view of a separation assembly in accordance with example 1 of the present utility model;

FIG. 9 is a schematic view of a gear cover in embodiment 1 of the present utility model;

FIG. 10 is a schematic view of a power receiving element according to embodiment 1 of the present utility model;

FIG. 11 is a schematic view of a first split cam in embodiment 1 of the present utility model;

FIG. 12 is a schematic view of a second split cam in embodiment 1 of the present utility model;

FIG. 13 is a schematic view of a connector according to embodiment 1 of the present utility model;

FIG. 14 is a schematic view of a gear member according to embodiment 1 of the present utility model;

FIG. 15 is a schematic view showing the contact of the developing roller with the photosensitive drum in embodiment 1 of the present utility model;

fig. 16 is a schematic view of a separation assembly when the process cartridge is in the driving force connection position in embodiment 1 of the present utility model;

fig. 17 is a schematic view showing the mating relationship of the power receiving member and the power transmitting member when the process cartridge is in the driving force connecting position in embodiment 1 of the present utility model;

FIG. 18 is a schematic sectional view showing a separation assembly of the process cartridge of embodiment 1 of the present utility model in a driving force connecting position;

fig. 19 is a schematic diagram showing separation of a developing roller from a photosensitive drum in embodiment 1 of the present utility model;

fig. 20 is a schematic view of a separation assembly when the process cartridge is in the driving force off position in embodiment 1 of the present utility model;

fig. 21 is a schematic view showing the mating relationship of the power receiving member and the power transmitting member when the process cartridge is in the driving force disconnected position in embodiment 1 of the present utility model;

fig. 22 is a schematic sectional view of the separation assembly when the process cartridge is in the driving force disconnected position in embodiment 1 of the present utility model;

FIG. 23 is a schematic sectional view showing a separation assembly of the process cartridge of embodiment 2 of the present utility model in a driving force connecting position;

FIG. 24 is a schematic sectional view showing a separation assembly in which the process cartridge is located at the driving force connecting position in embodiment 3 of the present utility model;

fig. 25 is a schematic sectional view of a separation assembly in which the process cartridge is located at the driving force connecting position in embodiment 4 of the present utility model.

Detailed Description

In order to make the technical solution and the technical effects of the embodiments of the present utility model more clear, the technical solution of the process cartridge of the present utility model will be clearly and completely described below with reference to the accompanying drawings. It is apparent that the described embodiment is only one preferred embodiment of the present utility model, but not all embodiments, and that other embodiments, which are obtained by those skilled in the art without inventive effort, are within the scope of the present utility model based on the embodiments of the present utility model.

[ example 1 ]

In the following description, the cartridge holder 90 supports the process cartridge B mounted to the electrophotographic image forming apparatus a in a backward-forward direction, the longitudinal direction of the process cartridge B is a left-right direction, which is also referred to as an axial direction in the following partial description, a direction perpendicular to the axial direction is a radial direction, and the power receiving member 111 is located at the right end of the process cartridge B in the left-right direction.

Integral structure of electrophotographic image forming apparatus

As shown in fig. 1-2, an electrophotographic image forming apparatus a is disclosed in the prior art, comprising: a mounting port 92; a door cover 80 having an open position not covering the mounting opening 92 and a closed position covering the mounting opening 92; a cartridge 90 including 4 housing portions 91,4 housing portions 91 which can house the process cartridges B, arranged in the front-rear direction, the cartridge 90 being pushed forward into the electrophotographic image forming apparatus a or pulled out rearward from the electrophotographic image forming apparatus a in the open position of the door 80; a separation member (not shown) reciprocally movable in the front-rear direction under the control of the electrophotographic image forming apparatus a; the power output member 50 is configured to receive and transmit a rotational driving force from a motor (not shown) of the electrophotographic image forming apparatus a, and the power output member 50 has thereon a power output member recess 51 configured as a recess.

Integral structure of process cartridge

As shown in fig. 3 to 4 and 19, a process cartridge B according to the present utility model is detachably mounted in the above-described electrophotographic image forming apparatus a, the process cartridge B comprising: the developing cartridge and the drum cartridge operatively connected together, the developing cartridge including a first casing 130, the drum cartridge including a second casing 140, the first casing 130 and the second casing 140 being combined with each other, the first casing 130 storing developer, the second casing 140 being for collecting waste developer remaining after development, the second casing 140 including a driving end protecting cover 140a provided at a right end of the second casing 140, a conductive end protecting cover 140b provided at a left end thereof, and a second casing body 140c provided between the driving end protecting cover 140a and the conductive end protecting cover 140b, wherein the driving end protecting cover 140a, the conductive end protecting cover 140b, the second casing body 140c are integrally formed, alternatively, the driving end protecting cover 140a, the conductive end protecting cover 140b, the second casing body 140c may be separately provided; a photosensitive drum 102 forming an electrostatic latent image and rotatable about a photosensitive drum axis extending in an axial direction, the photosensitive drum 102 being rotatably supported on the second casing 140; a developing roller 101 that develops the electrostatic latent image on the photosensitive drum 102 and is rotatably supported on the first casing 130; when the process cartridge B is mounted in the electrophotographic image forming apparatus a and the process cartridge B is operated, the developing roller 101 is held in close contact with the photosensitive drum 102 by the elastic force of a spring (not shown) on the process cartridge B to convey the developer on the developing roller 101 to the photosensitive drum 102, it is worth mentioning that a portion of the developing roller 101 in contact with the photosensitive drum 102 is made of an elastic material, in order to prevent the developing roller 101 from being deformed by the surface of the developing roller 101 or the substance precipitated from the surface of the developing roller 101 from contaminating the photosensitive drum 102 due to the long-time contact of the developing roller 101 with the photosensitive drum 102, the process cartridge B is further provided with a separating force receiving member (not shown), and when the process cartridge B is not operated for printing, the separating member in the electrophotographic image forming apparatus can push the separating force receiving member to move, and the moving separating force receiving member can push the first casing 130 around the second casing 140 to a separating position where the developing roller 101 is separated from the photosensitive drum 102 at a contact position where the developing roller 101 is in contact with the photosensitive drum 102, so that the problem can be prevented from occurring on the photosensitive drum 102 when the process cartridge B is not operated for printing.

Structure of separation assembly

As shown in fig. 1 to 14, the process cartridge B further includes a separation member 120 provided at the right end of the first casing 130, and a specific structure of the separation member 120 will be described with reference to fig. 1 to 14, and first, an overall arrangement thereof will be described. Referring to fig. 7, the separation assembly 120 is disposed between the driving end cover 140a and the right end sidewall of the first housing 130, and the separation assembly 120 is sequentially disposed from the right end to the left end: the gear cover 110, the power receiving part 111, the first separating cam 112, the second separating cam 113, the connecting part 114, the power transmitting part 115, the resetting part 116 and the gear part 117 are coaxially arranged, so that the space on the right side of the processing box is saved, the size of the processing box is reduced, and the processing box is more compact; the specific structure of the above-described components and the connection and fitting relationship between the components will be described in detail with reference to the accompanying drawings.

Fig. 9 shows a schematic view of the gear cover 110, which is fixed to the right end of the first housing 130, and which may be used to cover at least a portion of the separation assembly 120 for supporting the separation assembly 120 and preventing the separation assembly 120 from being disturbed by external components, the gear cover 110 has an inner surface 110a facing the first housing 130 and an outer surface 110b disposed opposite to the inner surface 110a, and an opening 110c exposing at least a portion of the power receiving member 111 to allow the power receiving member protrusion 111a (described in detail later) to engage with the power output member recess 51 is further provided on the gear cover 110, and at least one gear cover protrusion 110d as a guide portion is formed to extend from the inner surface 110a of the gear cover 110 toward a side close to the first housing 130.

Fig. 10 shows a schematic view of the power receiving member 111, one end of the power receiving member 111 in the longitudinal direction having a power receiving member protrusion 111a configured as a protrusion, the power receiving member protrusion 111a matably engaged with the power outputting member recess 51 of the power outputting member 50 to be able to receive the driving force from the electrophotographic image forming apparatus a, and rotated about a first axis extending in the axial direction; the other end of the power receiving member 111 in the length direction is further provided with a power receiving member shaft portion 111b and a plurality of power receiving member engaging portions 111c provided between the power receiving member protruding portion 111a and the power receiving member shaft portion 111b, the plurality of power receiving member engaging portions 111c being provided at intervals in the circumferential direction of the power receiving member 111, the power receiving member engaging portions 111c being a concave structure formed on the power receiving member 111, in particular, a groove, alternatively, a hole, the structure of the groove or the hole being relatively simple and easy to process; specifically, the power receiving element engagement portion 111c has a first opening 111c1 and a second opening 111c2 adjacent to the first opening 111c1, the first opening 111c1 being exposed outward in the radial direction of the power receiving element 111, the second opening 111c2 being exposed toward the side facing the first housing 130 in the axial direction of the power receiving element 111.

Fig. 11 shows a schematic view of a first separation cam 112, the first separation cam 112 being provided with a first separation cam annular portion 112c as a main body portion and being hollow, the first separation cam annular portion 112c having a substantially annular configuration; the first separation cam 112 is further provided with a first separation cam protrusion 112a and a plurality of first separation cam protrusions 112d extending outwardly from the first separation cam annular portion 112c in the radial direction of the first separation cam annular portion 112c, the first separation cam protrusion 112a being extendable into a regulating portion 140a1 (refer specifically to fig. 5) of the drive end cover 140a configured as a recess so as to be engaged with the regulating portion 140a1, and when the process cartridge B is shifted from the operating state to the non-operating state, the first casing 130 is swung about the second casing 140 in the swinging direction M as viewed from the right end toward the left end of the process cartridge B so that the developing roller 101 and the photosensitive drum 102 are moved from the contact position in contact shown in fig. 15 to the separated separation position shown in fig. 19, and the respective members supported on the first casing 130 except the first separation cam 112 are also swung rotationally about the second casing 140 in the swinging direction M by a certain angle so as to be rotatable relative to the drive end cover 140a which is kept still, but the first separation cam 112 is not engaged with the regulating portion 140a1 so as to be prevented from being engaged with the drive end cover 140a 1; the first separation cam 112 further includes a first separation cam inclined portion 112b formed on the first separation cam protrusion 112d, the first separation cam inclined portion 112b being formed to have an inclined surface facing the second separation cam 113.

Fig. 12 shows a schematic view of a second separating cam 113, the second separating cam 113 being provided with a hollow second separating cam annular portion 113c as a main body portion, the second separating cam annular portion 113c likewise having a substantially annular configuration; a plurality of second separation cam protrusions 113a are formed extending from the second separation cam annular portion 113c toward a side close to the first separation cam 112 with a space portion therebetween, into which the first separation cam protrusion 112d is inserted after the completion of the assembly of the separation assembly 120, such that a second separation cam guide groove 113d configured as a groove portion is formed between the second separation cam protrusion 113a and the first separation cam protrusion 112d, wherein both the extending directions of the second separation cam guide groove 113d and the gear cover protrusion 112d are parallel to the axial direction, and in the process cartridge B, the gear cover protrusion 112d as a guide portion on the gear cover 110 is insertable into and engaged with the second separation cam guide groove 113d as a guided portion, is restricted by the gear cover 110 by the engagement of the gear cover protrusion 112d with the second separation cam guide groove 113d, so that the second separation cam 113 does not rotate relative to the gear cover 110 in the circumferential direction, while ensuring that the second separation cam 113 can move only in the axial direction relative to the gear cover 110, a second separation cam inclined portion 113B is also formed at the surface of the second separation cam protrusion 113a, the second separation cam inclined portion 113B being formed to have an inclined surface facing the first separation cam 112, in the process cartridge B, the second separation cam inclined portion 113B can abut against the first separation cam inclined portion 112B, the second separation cam 113 can slide axially relative to the first separation cam inclined portion 112B under the urging of the axial reaction force of the first separation cam 112, and cannot rotate because the first separation cam 112 is restricted by the driving end protecting cover 140a, so that when the first housing 130 rotates around the second housing 140, the second separation cam 113 may be forced to be pushed by the first separation cam 112 to move toward a side close to the first housing 130 by the abutment sliding of the second separation cam inclined portion 113b and the first separation cam inclined portion 112 b.

Fig. 13 shows a schematic view of a connector 114, where the connector 114 is generally hollow and circular in shape, and a plurality of connector power receiving holes 114a and connector power transmitting holes 114b are formed in the connector 114 at intervals along the circumferential direction of the connector 114, and the connector power receiving holes 114a and the connector power transmitting holes 114b are through holes penetrating through the thickness direction of the connector 114.

Referring to fig. 8, 17 and 21, the power transmission member 115 is movably disposed in the separating assembly 120, the power transmission member 115 includes a first power transmission portion 115a and a second power transmission portion 115b connected to the first power transmission portion 115a, further, the first power transmission portion 115a and the second power transmission portion 115b are integrally formed, only one set of molds is required in production, production cost is significantly reduced and production efficiency is improved, wherein an extending direction of the first power transmission portion 115a intersects an extending direction of the second power transmission portion 115b, the first power transmission portion 115a and the second power transmission portion 115b are each configured as a protrusion, in particular, configured as a lever, wherein the first power transmission portion 115a configured as a lever is insertable into the power receiving member engaging portion 111c configured as a groove or hole and is capable of receiving a driving force of the power receiving member 111, the second power transmission portion 115b also configured as a lever is insertable into the connecting member power receiving hole 114a so that the connecting member 114 is capable of being separated from the second power transmission portion 114b along with the rotating member 115, and the second power transmission portion is disposed in contact with the second cam portion 114b at a certain distance from the outer surface 114 when the second power transmission portion 101 is separated from the second cam portion 114 b; further, the first power transmission portion 115a is substantially perpendicular to the second power transmission portion 115b, wherein the extending direction of the second power transmission portion 115b is substantially parallel to the axial direction so that the power transmission member 115 can move in the axial direction after being pushed by the second separation cam 113 that moves in the axial direction, thereby forcing the first power transmission portion 115a out of engagement with the power receiving member 111; further, the plurality of power transmission members 115 are arranged at intervals in the rotation direction of the power transmission members 115, and by adopting the arrangement of the plurality of power transmission members 115, the acting force required to be borne on a single power transmission member 115 can be reduced, the service life of the power transmission member is prolonged, the power transmission member is more stable in power transmission, and the number of the power transmission members 115 is preferably 3; the restoring member 116 in the separating assembly 120 is abutted between the power transmission member 115 and the gear member 117, the restoring member 116 can provide restoring force for the power transmission member 115, and elastic force generated by the restoring member 116 can push the power transmission member 115 to keep the power transmission member 115 connected with the power receiving member 111, so that the power transmission member 115 can continuously receive driving force, and preferably, the restoring member 116 is a spring, and the structure is simple and the cost is low.

Fig. 14 shows a schematic view of the gear member 117, the gear member 117 having gear member gear teeth 117c provided on an outer circumferential surface of the gear member 117, the gear member gear teeth 117c being rotatable in mesh with a developing roller gear (not shown) and other gears mounted on the developing roller 101, which are also provided at the right end of the first housing 130, to thereby rotate other rotating members such as the developing roller 101; the gear member 117 further includes a receiving chamber formed with a space in which a gear member positioning hole 117a is provided, the power receiving member shaft portion 111b is mountable in the gear member positioning hole 117a and rotatable with respect to the gear member positioning hole 117a, a plurality of gear member power receiving shafts 117b are provided at intervals in a circumferential direction of the gear member 117, the plurality of gear member power receiving shafts 117b are matably inserted into the coupling member power transmitting holes 114b of the coupling member 114 such that the coupling member 114 can drive the gear member 117 to rotate together when the coupling member 114 is rotated by force, that is, the coupling member 114 has a basic configuration of a flange, and the coupling member 114 can connect the upstream power transmitting member 115 and the downstream gear member 117 such that the power transmitting member 115 can transmit driving force into the gear member 117 through the coupling member 114.

Drive force off operation

Next, a description will be given of a disconnection operation in which the power transmitting member 115 is moved from the driving force connection position to the driving force disconnection position, in the course of moving the developing roller 101 and the photosensitive drum 102 from the contact position of the contact to the separation position of the separation.

Driving force connection position

As shown in fig. 17, when the process cartridge B performs a printing job, the separation member of the electrophotographic image forming apparatus a and the separation force receiving member of the process cartridge B are spaced apart from each other, at which time the developing roller 101 is brought into contact with the photosensitive drum 102, which is referred to as a "driving force connection position" of the process cartridge B, fig. 15 to 18 show a schematic view of the separation assembly 120 in which the process cartridge B is in the driving force connection position, in which position the power receiving member 111 is engaged with the power output member 50 of the electrophotographic image forming apparatus a to be able to receive the driving force transmitted from the power output member 50, at which time the first power transmitting portion 115a of the power transmitting member 115 is urged by the elastic force of the restoring member 116 to be held in axial engagement with the power receiving member engaging portion 111c of the power receiving member 111, at which time the power transmitting member 115 is in the first position, so the rotating power receiving member 111 can drive the power transmitting member 115 to rotate, and at the same time the power transmitting member 115 drives the connecting member 114 to rotate, and finally the gear member 117 will drive the developing roller gear (not shown) mounted on the developing roller 101 to rotate, and other associated gears to rotate, etc. to drive the developing roller 101 to rotate. Accordingly, the driving force input from the electrophotographic image forming apparatus a to the upper moving force receiving member 111 can be transmitted to other gears such as a developing roller gear through the power transmitting member 115, the connecting member 114, and the gear member 117, thereby enabling to drive the rotation members such as the developing roller 101 to rotate.

Drive force off position

As shown in fig. 21, when the process cartridge B is not performing a print job, the electrophotographic image forming apparatus a will control the separating member to move, the moving separating member pushing the separating force receiving member of the process cartridge B to move the first housing 130 around the second housing 140 from a contact position where the developing roller 101 shown in fig. 15 contacts the photosensitive drum 102 to a separating position where the developing roller 101 shown in fig. 19 separates from the photosensitive drum 102, which is referred to as a "driving force off position" of the process cartridge B, fig. 19 to 22 show a schematic view of the separating assembly 120, in which, during the movement of the first housing 130 described above, the respective members mounted on the first housing 130 will swing with the first housing 130 in the swinging direction M by a certain angle with respect to the stationary driving end protecting cover 140a, but since the first separation cam protrusion 112a of the first separation cam 112 is engaged with the regulating portion 140a1 of the drive end cover 140a such that the first separation cam 112 cannot swing in the swing direction M of the first housing 130 while remaining relatively stationary with the drive end cover 140a, and the second separation cam 113 is also movable in the axial direction with respect to the gear cover 110 and rotatable with respect to the drive end cover 140a due to being restrained by the gear cover protrusion 110d on the gear cover 110, but cannot rotate with respect to the gear cover 110, during rotation of the first housing 130, the second separation cam 113 swings in the swing direction M with respect to the first separation cam 112 that remains stationary, since the first separation cam inclined portion 112B of the first separation cam 112 abuts against the second separation cam inclined portion 113B of the second separation cam 113, the second separating cam 113 is forced to move toward the side close to the first housing 130 by a reaction force generated during the swinging of the second separating cam 113 in the swinging direction M, which is directed toward the first housing 130 in the axial direction, and the second power transmitting portion 115b protruding from the outer surface of the connecting member 114 is forced by the movable second separating cam 113 as a linkage to move the power transmitting member 115 toward the side close to the first housing 130 against the elastic force of the restoring member 116, and during this movement, the first power transmitting portion 115a gradually disengages from the power receiving member engaging portion 111c of the power receiving member 111 in the axial direction, and the power transmitting member 115 stops rotating due to the failure to receive the driving force transmitted from the power receiving member 111, and at this time, the power transmitting member 115 is in the second position, and the downstream connecting member 114, the gear member 117, the developing roller gear stop rotating, and finally, the rotating members such as the developing roller 101 connected to the developing roller gear stop rotating due to receiving the driving force not transmitted to the upstream driving force, thereby achieving the operation from the connection to the disconnection.

In general, the process cartridge B can realize the disconnection of the driving force between the power receiving member 111 and the power transmitting member 115 by the separation of the developing roller 101 from the photosensitive drum 102, thereby forcing the developing roller 101 to stop rotating, reducing the abrasion of the developing roller 101 and the toner discharging blade, and improving the service life of the developing roller 101.

Driving force connection operation

When the process cartridge B is to be switched from a state in which the printing job is not performed to a state in which the job is performed, the electrophotographic image forming apparatus a will control the separating member to move such that the separating member of the electrophotographic image forming apparatus a no longer exerts a force on the separating force receiving member of the process cartridge B, the first casing 130 swings about the second casing 140 in a swinging direction opposite to the swinging direction M under the elastic restoring force of the restoring member 116 such that the developing roller 101 and the photosensitive drum 102 are moved again from the separated position of fig. 19 to the contact position of the contact of fig. 15, and the subsequent power connection operation is opposite to the above-described power disconnection operation, which will not be repeated here.

[ example 2 ]

Next, embodiment 2 of the present utility model will be described in detail with reference to fig. 23, and for the same portion of the process cartridge B as in embodiment 1, the difference is that the moving direction of the power transmission member is changed, specifically, the power transmission member 215 in this embodiment is substantially 7-shaped, the extending direction of the second power transmission portion 215B has a certain inclination angle with respect to the axial direction, and when the developing roller 101 is separated from the photosensitive drum 102 (see fig. 19 in detail), the second separating cam 213 presses the second power transmission portion 215B protruding from the outer surface of the connecting member 214 to force the power transmission member 215 to move in the axial direction and move in the radial direction against the elastic force of the restoring member 216, which also enables the first power transmission portion 215a to disengage from the power receiving member engaging portion 211c3 and disconnect the power connection with the power receiving member 211, thereby achieving the technical effect of clutch.

[ example 3 ]

The present embodiment is different from the above-described embodiment 1 or 2 in that the power transmission member may be moved in a manner such that it is moved in the radial direction to disengage from the power receiving member 311 and disconnect the driving force, as shown in fig. 24, in addition to the unidirectional movement in the axial direction and the compound movement in the radial direction while being moved in the axial direction.

Specifically, the power transmission member 315 of the present embodiment is different from the integrally molded configuration of the above-described embodiment 1 or 2 in that the first power transmission portion 315a and the second power transmission portion 315b of the power transmission member 315 of the present embodiment are separate, specifically, the second power transmission portion 315b has a push-on inclined surface, the first power transmission portion 315a also has a push-on inclined surface that abuts against the push-on inclined surface of the second power transmission portion 315b, and the first power transmission portion 315a and the second power transmission portion 315b are connected together to be rotatable together by means of the hole shaft or the slot hole as described above, one end of the first power transmission portion 315a in the axial direction near the gear member 317 abuts against the gear member 317 to prevent the first power transmission portion 315a from moving in the axial direction, while the restoring member 316 in this embodiment abuts between the first power transmission portion 315a and the connecting member 314 in the radial direction, the elastic force generated by the restoring member 316 can urge the first power transmission portion 315a to move radially inward to maintain engagement of the first power transmission portion 315a with the power receiving member engaging portion 311c, and when the developing roller 101 is separated from the photosensitive drum 102 (see fig. 19 in particular), the second separating cam 313 presses the second power transmission portion 315b protruding from the outer surface of the connecting member 314, and the moved second power transmission portion 315b presses the forced inclined surface of the first power transmission portion 315a by the forced inclined surface thereof to generate a radially outward component force, thereby forcing the first power transmission portion 315a to move radially outward against the elastic force of the restoring member 316, achieving the technical effect of clutching.

Of course, the power transmission member 315 in the present embodiment may be integrally formed, that is, the pushing inclined surface may be disposed on the connecting member 314, and the pushing inclined surface may be still disposed on the power transmission member 315, so as to achieve the above-mentioned clutch effect.

[ example 4 ]

The present embodiment is different from the above-described embodiment in that the power transmission member 415 and the connecting member 414 may not be provided as separate members, i.e., the power transmission member 415 may be of an integrally formed configuration with the connecting member 414, and when the developing roller 101 is separated from the photosensitive drum 102 (refer specifically to fig. 19), the second separation cam 413 presses the power transmission member 415 so that the power transmission member 415 moves together with the connecting member 414 in the axial direction, engagement and disengagement with the power receiving member 411 is achieved, and a technical effect of clutching is achieved.

In general, in the above-described embodiments 1 and 4, the power transmitting member is disengaged from the power receiving member in a sliding manner in the axial direction during the separation of the developing roller from the photosensitive drum. In the above-described embodiments 2 and 3, the power transmitting member is disengaged from the power receiving member in such a manner as to slide at least in the radial direction during the separation of the developing roller from the photosensitive drum. However, it should be understood that no matter whether the power transmission member is axially or radially disengaged from the power receiving member, only a portion of the embodiments are exemplified herein and that the utility model is not limited to the above-exemplified embodiments, but rather the preferred embodiments are utilized herein.

Advantageous effects

The above embodiments are only for illustrating the technical solution of the present utility model, and are not limiting; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present utility model.

Claims

1. A process cartridge detachably mountable to an electrophotographic image forming apparatus, said process cartridge comprising:

a photosensitive drum;

wherein the power transmission member is slidably disengaged from the power receiving member at least in a radial direction perpendicular to the axial direction in response to movement of the separation cam.

2. A process cartridge according to claim 1, wherein said power transmitting member includes a first power transmitting portion and a second power transmitting portion disposed crosswise, said first power transmitting portion being engageable with said power receiving member, said second power transmitting portion being receivable of an urging force of said separation cam to disengage said first power transmitting portion from said power receiving member.

3. A process cartridge according to claim 2, wherein said first power transmitting portion and said second power transmitting portion are each configured as a lever.

4. A process cartridge according to claim 2, wherein an extending direction of said second power transmitting portion is inclined from said axial direction.

5. A process cartridge according to claim 2, wherein said first power transmitting portion and said second power transmitting portion are integrally formed.

6. A process cartridge according to claim 2, wherein said first power transmitting portion and said second power transmitting portion are provided separately.

7. A process cartridge according to claim 6, wherein at least one of said first power transmitting portion and said second power transmitting portion is provided with a forced pushing inclined surface, said second power transmitting portion being forced to push said first power transmitting portion so as to slide said first power transmitting portion in said radial direction.

8. A process cartridge according to claim 1, wherein said power transmitting member is provided in plural, and a plurality of said power transmitting members are arranged at intervals in a rotation direction of said power transmitting member.

9. The process cartridge according to claim 1, further comprising a spring coupled to the power transmitting member, wherein an elastic force generated by the spring maintains the power transmitting member in a position engaged with the power receiving member when the process cartridge is not subjected to an external force.