CN118050965A - A processing box - Google Patents

Abstract

A process cartridge detachably mountable to an electrophotographic image forming apparatus including a tiltable power output member, the process cartridge comprising: a photosensitive drum; a coupling member configured to receive a driving force for driving the photosensitive drum to rotate; the device further comprises a support for supporting the photosensitive drum and driving the photosensitive drum to move together between a first position for reducing the inclination angle of the power output member relative to the photosensitive drum and a second position for retreating from the first position. The device ensures that the distance between the centralizing part and the photosensitive drum is not changed, and the power output part can be smoothly meshed with the coupling part, so that the structure is simple, and the installation process of the processing box is smoother.

Description

Processing box

Technical Field

The invention relates to the technical field of electrophotographic imaging, in particular to a processing box.

Background

The process cartridge is a cartridge detachably mountable to an electrophotographic image forming apparatus, and includes at least members such as a developing roller, a photosensitive drum, and the like as an integral unit. An electrophotographic image forming apparatus employing an electrophotographic image forming manner is operated as follows: the electrophotographic image forming apparatus irradiates light onto a photosensitive drum which has been uniformly charged by a charging roller and performs selective exposure to form an electrostatic latent image, which is then developed into a developer image by a developer covered on a developing roller, and the formed developer image is transferred onto a recording medium by a transfer machine, and finally a visualized image is formed on the recording medium.

As shown in fig. 1, an electrophotographic image forming apparatus including a power output member that can output power, the power output member being movable in an axial direction between a retracted position away from the process cartridge 50, in which the power output member cannot engage the process cartridge 50, and an extended position close to the process cartridge 50, and a process cartridge 50 mounted in the electrophotographic image forming apparatus are disclosed in the prior art. The conventional process cartridge 50 includes a power receiving member projection 41 engageable with the power output member and a developing roller gear 31, the power receiving member projection 41 being mounted at one axial end of the photosensitive drum 49 and being capable of driving the photosensitive drum 49 to rotate, the developing roller gear 31 being mounted at one axial end of a developing roller (not shown) and being capable of driving the developing roller to rotate, wherein at least a portion of the developing roller gear 31 is exposed to the outside of the process cartridge 50 and the position of the power output member is adjusted by a movable adjusting member to engage the developing roller gear 31 with the power output member, and in the engaged state of the two, the developing roller gear 31 is capable of pulling the power output member from the retracted position to the extended position. In the prior art, the adjusting part is arranged on the processing box through the elastic component, the structure is complex, and the adjusting part is easy to break in the transportation and use processes, so that the normal use of the processing box is affected.

Disclosure of Invention

In order to overcome the problems of the process cartridge in the prior art, the invention provides a novel process cartridge which is mainly realized by the following technical scheme:

a process cartridge detachably mountable to an electrophotographic image forming apparatus, said electrophotographic image forming apparatus including a tiltable power output member, said process cartridge comprising:

A photosensitive drum;

a coupling member configured to receive a driving force for driving the photosensitive drum to rotate;

The device further comprises a support for supporting the photosensitive drum and driving the photosensitive drum to move together between a first position for reducing the inclination angle of the power output member relative to the photosensitive drum and a second position for retreating from the first position.

Further, the bracket is provided with a righting portion that follows the bracket to move together between the first position and the second position to control the inclination angle of the power output member.

Further, the carriage is further provided with a guide projection formed extending in the left-right direction from the righting portion, the guide projection being engaged with a mounting rail in the electrophotographic image forming apparatus to guide the carriage to move.

Further, the support includes main part and righting portion, righting portion is followed main part bending extension forms, main part with righting portion is in left and right direction separation setting.

Further, a restoring member is provided between the housing and the bracket for providing a force to return the bracket from the second position to the first position.

Further, a slider is included that receives an external force and pushes against the bracket to restrain the bracket in the first position.

Further, the slider includes a rod-shaped portion, a biasing portion bent and extended from one end of the rod-shaped portion, and a force receiving portion extended from the other end of the rod-shaped portion in the front-rear direction.

Further, a first elastic member is provided between the slider and the housing, and the elastic member can force the slider to move away from the bracket.

Further, the novel rotary shaft comprises a first shell and a second shell, the support is provided with a rotary shaft, a first shaft hole is formed in the first shell in an extending mode, a second shaft hole is formed in the second shell, the first shaft hole is arranged on the rotary shaft and is coaxial with the rotary shaft, the second shaft hole is arranged on the rotary shaft and is coaxial with the rotary shaft, and the first shell and the second shell can relatively rotate through the rotary shaft, the first shaft hole and the second shaft hole.

Further, a second elastic member is further provided between the first casing and the second casing, and a distance between the rotation shaft and the photosensitive drum is smaller than a distance between the rotation shaft and the second elastic member.

The guide protrusion of the bracket of the processing box guides the first rotating piece to move from the first position to the second position, so that the centralizing part can enter the opening of the cover part and abut against the power output piece, when the door cover is closed, the door cover abuts against the sliding piece, and the sliding piece abuts against the bracket to move the bracket to the first position, at the moment, the centralizing part centralizes the power output piece to the centralizing position, and in the process, the photosensitive drum moves along with the bracket, so that the distance between the centralizing part and the photosensitive drum is not changed, the power output piece can be smoothly meshed with the coupling part, the structure is simple, and the installation process of the processing box is smoother.

Drawings

FIG. 1 is a schematic view of a prior art process cartridge;

FIG. 2 is a schematic view showing a process cartridge mounted to an electrophotographic image forming apparatus in an embodiment of the present invention;

FIG. 3 is an enlarged partial schematic view of FIG. 2A in accordance with an embodiment of the invention;

Fig. 4 is a schematic perspective view of a process cartridge according to a first embodiment of the present invention;

Fig. 5 is a front view of the left end of the process cartridge in the first embodiment of the present invention;

FIG. 6 is a schematic front view of a left-end non-edge cover of a process cartridge according to a first embodiment of the present invention;

fig. 7 is a front view schematically showing a right end of the process cartridge in the first embodiment of the present invention;

fig. 8 is a partially exploded view of the left end of the process cartridge in the first embodiment of the present invention;

Fig. 9 is a partially exploded view of the right end of the process cartridge in the first embodiment of the present invention;

fig. 10 is a schematic perspective view of a process cartridge according to a second embodiment of the present invention;

FIG. 11 is a front view of the left end of a process cartridge in accordance with the second embodiment of the present invention;

FIG. 12 is a front view showing a left end non-edge cover of a process cartridge according to a second embodiment of the present invention;

FIG. 13 is a partially exploded view of a process cartridge in accordance with a second embodiment of the present invention;

FIG. 14 is a partially exploded view of a process cartridge according to another embodiment of the present invention;

fig. 15 is a schematic perspective view of a process cartridge in a third embodiment of the present invention;

FIG. 16 is a front view showing the left end of the process cartridge in the third embodiment of the present invention;

FIG. 17 is a front view showing a left end non-edge cover of a process cartridge in accordance with a third embodiment of the present invention;

fig. 18 is a partially exploded view of a process cartridge in a third embodiment of the present invention.

Detailed Description

In order to make the technical solution and the technical effects of the embodiments of the present invention more clear, the technical solution of the process cartridge of the present invention 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 invention, 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 invention based on the embodiments of the present invention.

Example 1

In the following description, the process cartridge B is mounted into the electrophotographic image forming apparatus in a backward-forward direction, the photosensitive drum 149 is rotatable about a shaft hole line extending in a left-right direction, which is also an arrangement direction of a pair of side plates 20 of the electrophotographic image forming apparatus, and the power output member 10 is disposed on the right side of the electrophotographic image forming apparatus in the left-right direction.

As shown in fig. 2 to 3, the electrophotographic image forming apparatus includes a mounting port 60, a door cover (not shown) having an open position in which the mounting port 60 is uncovered and a closed position in which the mounting port 60 is covered, and a pair of side plates 20 provided at both left and right ends of the electrophotographic image forming apparatus, respectively, with a housing portion 70 formed therebetween, which can house a process cartridge B, which can be mounted from the mounting port 60 into the housing portion 70 in the electrophotographic image forming apparatus in a predetermined rail in a back-to-front direction when the door cover is in the open position; the electrophotographic image forming apparatus further includes a cover portion 40 provided on one of the side plates 20 and a power output member 10 at least partially accommodated in the cover portion 40, the cover portion 40 being provided with an opening to expose at least a portion of the power output member 10, and the power output member 10 having a first position and a second position, in particular, when the power output member 10 is in the first position, the power output member 10 has a tilted position and a retracted position so as not to engage with the process cartridge B, the shaft hole line of the power output member 10 in the tilted position is tilted with respect to the left-right direction, the power output member 10 in the retracted position is away from the other side plate 20 in the left-right direction, and when the power output member 10 is in the second position, the power output member 10 has a righted position and an extended position so as to engage with the process cartridge B, the shaft hole line of the power output member 10 in the righted position is parallel with respect to the left-right direction, and the power output member 10 in the extended position is closer to the other side plate 20 in the left-right direction than the power output member 10 in the retracted position, that is in the left-right direction than the power output member 10 in the retracted position when the process cartridge B is mounted in the electrophotographic image forming apparatus; the pto 10 comprises pto gear teeth 11 and pto recesses 12, the pto gear teeth 11 having a basic configuration of helical teeth and the pto recesses 12 having a basic configuration of recesses.

As shown in fig. 2 to 9, a process cartridge B in the present invention will be described in detail, the process cartridge B being detachably mountable to the above-described electrophotographic image forming apparatus, the process cartridge B including a housing 130 which can accommodate a developer, and a cover 128 mounted on a right end of the housing 130, and a photosensitive drum 149 rotatably supported on the housing 130 and capable of producing an electrostatic latent image, and a developing roller (not shown) rotatably supported on the housing 130 and capable of carrying a developer, the process cartridge B further including a rotatable stirring frame (not shown) provided at least in part inside the housing 130, the stirring frame being operable to stir the developer accommodated in the housing 130 to convey the developer onto the developing roller, the developer carried on the developing roller being deliverable onto the photosensitive drum 149 for developing the electrostatic latent image on the photosensitive drum 149.

The cartridge B further includes a power assembly for driving the rotating member, the power assembly being disposed at a right end of the cartridge B, at least a portion of which is covered by the cover 128. The power assembly includes a coupling member 132 and a power receiving gear 134, the coupling member 132 being mounted on the right end portion of the photosensitive drum 149 and operable to drive the photosensitive drum 149 in rotation, the power receiving gear 134 being a member independent of the coupling member 132, the power receiving gear 134 being configured to be mounted on the right end portion of the developing roller and having a basic configuration of straight teeth in the present embodiment, and also being configured as helical teeth in other alternative embodiments. Also, the power receiving gear 134 has an exposed portion exposed to the outside of the process cartridge B, the exposed portion being engageable with the power take-off gear teeth 11 to receive a driving force, the power receiving gear 134 having a helical configuration being engageable with the power take-off gear teeth 11 also having helical teeth when the process cartridge B is mounted in the electrophotographic image forming apparatus, both of which are rotated by engagement to generate an axial force in the left-right direction toward the coupling member 132, under which the power receiving gear 134 can force the power take-off 10 to move from the retracted position to the extended position to couple the power take-off recess 12 with the coupling member 132; the process cartridge B further includes a carriage gear 137 mounted at the right end of the carriage, wherein a first intermediate transmission gear 135 and a second intermediate transmission gear 136 which are engaged with each other are further connected between the power receiving gear 134 and the carriage gear 137, the power receiving gear 134 may transmit the driving force received from the power output member 10 to the carriage gear 137 through the first intermediate transmission gear 135 and the second intermediate transmission gear 136, and further, the carriage gear 137 may drive the carriage gear 137 to rotate, alternatively, the first intermediate transmission gear 135 and the second intermediate transmission gear 136 may not necessarily be provided between the power receiving gear 134 and the carriage gear 137, and either one of the first intermediate transmission gear 135 and the second intermediate transmission gear 136 or either one of the first intermediate transmission gear 135 and the second intermediate transmission gear 136 may not be provided, or two or more intermediate transmission gears may be provided, which are not limited.

As shown in fig. 4 to 9, the process cartridge B includes a rotating assembly movable with respect to the casing 130, the rotating assembly including a photosensitive drum 149, a first rotating member 141 and a second rotating member 142, the first rotating member 141 and the second rotating member 142 being mounted at both ends of the photosensitive drum 149, the first rotating member 141 being disposed at a left end of the casing 130, the second rotating member 142 being disposed at a right end of the casing 130, wherein the second rotating member 142 supports the photosensitive drum 149 and is fixed at one end of the photosensitive drum 149 by a pin 150. The first rotating member 141 includes a first main body portion 1411, a first shaft hole 1412, a centralizing portion 1413, and a guide protrusion 1414, the first main body portion 1411 is provided at the left end of the casing 130, the first shaft hole 1412 is formed through the first rotating member 141 in the left-right direction from the first main body portion 1411, the first shaft hole 1412 is rotatably fixed at the left end of the casing 130, the casing 130 is formed with a first fixing post 138 extending in the left-right direction, the first fixing post 138 is inserted into the first shaft hole 1412, the first rotating member 141 is rotatable about the first shaft hole 1412, the centralizing portion 1413 is formed by bending and extending from the first main body portion 1411 for centralizing the power output member 10 from an inclined position to a centralizing position when the process cartridge B is mounted in the electrophotographic image forming apparatus, wherein the centralizing portion 1413 can be rotated along with the first main body portion 1411, that is, a distance between the centralizing portion 1413 and the photosensitive drum 149 does not change during rotation, the guide protrusion 1414 is formed by extending in the left-right direction from the centralizing portion 3, the process cartridge B is mounted in the process cartridge B in the image forming member, the guide protrusion 1414 is formed by bending and extends around the first shaft hole 1412 in the left-right direction, the first rotating member, the process cartridge B is mounted in the image forming member, and the guide member is rotatably mounted in the image forming member so as to move along the guide portion, and the guide member 10 is moved along the guide portion and the guide member when the image forming member is mounted in the image. Also, the second rotating member 142 includes a second body portion 1421 and a second shaft hole 1422, the second body portion 1421 is disposed at the right end of the housing 130, the second shaft hole 1422 is formed through the second rotating member 142 from the second body portion 1421 in the left-right direction, the second shaft hole 1422 is rotatably fixed at the right end of the housing 130, and the second shaft hole 1422 is disposed coaxially with the first shaft hole 1412, the housing 130 is formed with a second fixing post 139 extending in the left-right direction, the second fixing post 139 is inserted into the first shaft hole 1412, and the first rotating member 141 is rotatable about the first shaft hole 1412.

As shown in fig. 6 and 8, the process cartridge B further includes a first restoring member 143, a second restoring member 144, a first elastic member 145, and a second elastic member 146, the first restoring member 143 and the first elastic member 145 being disposed at the left end of the casing 130, wherein the first elastic member 145 is fitted over the first fixing post 138, the second restoring member 144 and the second elastic member 146 being disposed at the right end of the casing 130, wherein the second elastic member 146 is fitted over the second fixing post 139, the first restoring member 143 and the second restoring member 144 being mounted between the casing 130 and the first rotating member 141 for restricting displacement of the rotating member, specifically, the rotating member being movable between a first position a and a second position B for allowing the centering portion 1413 to enter the opening of the cover portion 40, the photosensitive drum 149 being in contact with the developing roller when the rotating member is located at the first position a, the process cartridge B being rotatable about the first shaft hole 1412 and the second shaft hole 1422 to move from the first position a to the second position B, and the rotating member 143 being movable from the centering portion to the second position B due to the restoring member 144 being inclined to the centering portion 10. Wherein the first restoring member 143 and the second restoring member 144 are configured as tension springs, the first elastic member 145 and the second elastic member 146 are configured as torsion springs, and the first restoring member 143, the second restoring member 144, the first elastic member 145, and the second elastic member 146 serve to provide a reverse force to return the rotating assembly from the second position b to the first position a. The process cartridge B is further provided with a first cover 147 and a second cover 148, the first cover 147 being provided outside the left end of the process cartridge B, and the first cover 147 covering at least a portion of the first rotary 141 or covering at least a portion of the first elastic member 145; the second cover 148 is disposed outside the right end of the process cartridge B, and the second cover 148 covers at least a portion of the second rotation member 142 or at least a portion of the second elastic member 146.

As shown in fig. 2, the specific process of mounting the process cartridge B into the electrophotographic image forming apparatus is such that, when the process cartridge B is pushed into the housing portion 70 along the mounting port 60 in the open position of the door by the end user's hand, the process cartridge B enters the housing portion along the mounting rail, at which time the power take-off member 10 is in the inclined position and the retracted position, and the power take-off member 10 is blocked by the cover portion 40 such that the recess of the power take-off member 10 cannot protrude to engage with the coupling member 132, and in this process, the guide protrusions 1414 cooperate with the corresponding mounting rail and drive the centering portion 1413 to move along the predetermined rail, at which time the rotating assembly moves together with the centering portion 1413, and the centering portion 1413 enters and abuts the power take-off member 10 from the opening of the cover portion 40, and when the process cartridge B moves further along the mounting rail, the centering portion 1413 gradually centers the power take-off member 10 from the inclined position, and the process cartridge B is mounted. After the power take-off 10 starts to rotate, the power take-off gear 134 meshes with the power take-off gear teeth 11 of the power take-off 10 to follow the rotation of the power take-off 10, and when the power take-off gear 134 continues to follow the rotation of the power take-off 10, the power take-off 10 is pulled out from the retracted position to the extended position by the power take-off gear 134, so that the power take-off recess 12 is coupled with the coupling member 132, that is, when the coupling member 132 receives the driving force transmitted from the power take-off 10 to start to drive the photosensitive drum 149 to rotate, the power transmission of the process cartridge B with the electrophotographic image forming apparatus is completed. Regarding the process of detaching the process cartridge B from the electrophotographic image forming apparatus, contrary to the above-described mounting process, a detailed description thereof will be omitted.

When the process cartridge is mounted in the electrophotographic image forming apparatus according to a predetermined mounting rail, the guide projection of the first rotary member of the process cartridge of the present invention guides the first rotary member to move from the first position to the second position, so that the centering portion enters the opening of the cover portion and abuts against the power output member, and returns to the first position under the action of the first elastic member and the second elastic member, the power output member is centered to the centering position by the centering portion, and in this process, the second rotary member and the photosensitive drum follow together to move, thereby ensuring that the distance between the centering portion and the photosensitive drum does not change, and the power output member can be smoothly engaged with the coupling member, and the structure is simple, and the process cartridge mounting process is smoother.

Example two

Next, a second embodiment of the present invention will be described, which differs from the first embodiment in that the righting mechanism differs from the first embodiment.

As shown in fig. 10 to 14, the process cartridge B includes a holder 241 provided at a left end of the process cartridge B for supporting the coupling member 132, the holder 241 including a main body portion 2411, a centering portion 2412, and a guide projection 2413, the main body portion 2411 being of a flat plate-like structure perpendicular to a left-right direction, the main body portion 2411 having a through hole therebetween for supporting the coupling member 132, the centering portion 2412 being formed by bending-extending from the main body portion 2411, the guide projection 2413 being formed by extending from the centering portion 2412 in the left-right direction, the centering portion 2412 being provided separately from the main body portion 2411 in the left-right direction for centering the power output member 10 from an inclined position to a centering position when the process cartridge B is mounted in the electrophotographic image forming apparatus, wherein the centering portion 2413 is rotatable following the first main body portion 2411, i.e., a distance between the centering portion 2412 and the photosensitive drum 2412 does not change during rotation, the guide projection 2413 is formed by extending from the centering portion 2412 in the left-right direction, and the guide projection 2413 is mounted in the electrophotographic image forming apparatus in the left-right direction, the guide projection is mounted on the guide rail 241 so as to smoothly move along the guide rail 40 and guide the centering portion 241 and the guide rail 40 is mounted in the electrophotographic image forming apparatus, and the guide rail is smoothly moved along the guide rail. The support 241 is further provided with a rotation shaft 2415 and a force receiving groove 2414, and the force receiving groove 2414 may receive an external force and drive the support 241 to rotate about the rotation shaft 2415, thereby driving the photosensitive drum 149 to move so as to bring the photosensitive drum 149 into contact with the developing roller. The process cartridge B further includes a first elastic member 242, the first elastic member 242 being disposed between the second casing 131 and the bracket 241 for restricting the movement of the bracket 241 to move the photosensitive drum distance 149 away from the first casing 130. In the present embodiment, the first elastic member 242 is provided as an extension spring, and in other embodiments, an elastic member such as a torsion spring or the like that can achieve the same function may be provided. Specifically, the holder 241 is movable between a first position a, in which the photosensitive drum 149 is in contact with the developing roller, and a second position B, in which the holder 241 is positioned in the first position a, the photosensitive drum 149 is in contact with the developing roller, the cartridge B is normally printable, the holder 241 is rotatable about the rotation shaft 2415 to move from the first position a to the second position B, and the first resilient member 242 is returned to the first position a, in which the centering portion 2412 is allowed to enter the cover 40 to center the power output member 10 from the inclined position to the centering position.

As shown in fig. 13 to 14, the left end of the process cartridge B is provided with a slide groove 1311, the slide groove 1311 is provided on the second casing 131, and a slider 243 is slidably provided in the slide groove 1311 and movable relative to the second casing 131. The sliding member 243 includes a rod-shaped portion 2431, a force applying portion 2432 extending from one end of the rod-shaped portion 2431 in a bending manner, and a force receiving portion 2433 extending from the other end of the rod-shaped portion 2431 in the front-rear direction, wherein the force receiving portion 2433 is formed as a force receiving plane to receive external force, specifically, the force receiving portion 2433 of the sliding member 243 can receive pushing force of the door cover when the door cover is closed to move the sliding member 243, so that the force applying portion 2432 enters the force receiving groove 2414 to push the support 241 to make the support 241 drive the photosensitive drum 149 to move close to the first housing 130. The second elastic member 244 is disposed between the sliding member 243 and the second housing 131, and in a state in which the sliding member 243 is not subjected to an external force, the second elastic member 244 may force the sliding member 243 to rebound, thereby allowing the sliding member 243 to yield the displacement of the bracket 241. The left end of the process cartridge B is further provided with a cover 245, the cover 245 is mounted outside the second casing 131 and covers at least a portion of the slider 243, and the cover 245 may be fixed outside the second casing 131 by a pin 246.

As shown in fig. 2, the specific process of mounting the process cartridge B into the electrophotographic image forming apparatus is such that, when the end user holds the process cartridge B in his hand in the open position of the door and pushes it into the accommodating portion 70 along the mounting port 60, the process cartridge enters the accommodating portion 70 along the mounting rail, at which time the power take-off member 10 is in the inclined position and the retracted position, and the power take-off member 10 is blocked by the cover portion 40 so that the recess of the power take-off member 10 cannot protrude to engage with the coupling member 132, and in this process, the guide projection 2413 cooperates with the corresponding mounting rail and brings the centering portion 2412 along the predetermined rail, at which time the support 241 moves together with the centering portion 2412, and the centering portion 2412 enters and abuts the power take-off member 10 from the opening of the cover portion 40, in which process the support 241 moves from the second position B to the first position a and returns to the second position B after the centering portion 2412 centers the power take-off member 10. When the door is closed, the door pushes against the force receiving portion 2433 of the slider 243, causing the force applying portion 2432 to enter the force receiving groove 2414 of the bracket 241 and push against the bracket 241 to move from the second position b to the first position a, causing the photosensitive drum 149 to contact the developing roller, and causing the centering portion 2412 to gradually center the power output member 10 from the inclined position. After the power take-off 10 starts to rotate, the power take-off gear 134 meshes with the power take-off gear teeth 11 of the power take-off to follow the rotation of the power take-off, and when the power take-off gear 134 continues to follow the rotation of the power take-off 10, the power take-off 10 is pulled out by the power take-off gear 134 from the retracted position to the extended position, so that the power take-off recess 12 is coupled with the coupling member 132, that is, when the coupling member 132 receives the driving force transmitted from the power take-off 10 to start driving the photosensitive drum 149 to rotate, the power transmission of the process cartridge B with the electrophotographic image forming apparatus is completed. Regarding the process of detaching the process cartridge B from the electrophotographic image forming apparatus, contrary to the above-described mounting process, a detailed description thereof will be omitted.

When the process cartridge is mounted in the electrophotographic image forming apparatus according to a predetermined mounting rail, the guide projection of the carriage of the process cartridge of the present invention guides the first rotation member to move from the first position to the second position so that the centering portion can enter the opening of the cover portion and abut against the power output member, and when the door is closed, the door abuts against the sliding member and the sliding member abuts against the carriage so that the carriage moves to the first position, and at this time, the centering portion centers the power output member to the centering position, and in this process, the photosensitive drum moves together with the carriage, thereby ensuring that the distance between the centering portion and the photosensitive drum does not change, and the power output member can be smoothly engaged with the coupling member.

Example III

The third embodiment of the present invention is different from the second embodiment in that the rotation axis is different from the second embodiment.

As shown in fig. 18, the first casing 130 and the second casing 131 are relatively movable, and specifically, the process cartridge B is provided with a rotation shaft 3415, the rotation shaft 3415 being formed extending in the left-right direction from the first casing 130, and the second casing 131 being mounted on the rotation shaft 3415 so that the second casing 131 is rotatable relative to the first casing 130. The protecting cover 128 may be fixed on the first housing 130 by a screw, the protecting cover 128 is integrally extended to form a first shaft hole 1281, the first shaft hole 1281 is mounted on the rotating shaft 3415 and the first shaft hole 1281 is coaxial with the rotating shaft 3415, the second housing 131 is provided with a second shaft hole 138, the second shaft hole 138 is mounted on the rotating shaft 3415 and the second shaft hole 138 is coaxial with the rotating shaft 3415, that is, the first housing 130 and the second housing 131 may relatively rotate through the cooperation of the rotating shaft 3415, the first shaft hole 1281 and the second shaft hole 138. An elastic member 139 is further disposed between the first housing 130 and the second housing 131, centering around the rotation axis 3415, the elastic member 139 is disposed on one side of the rotation axis 3415, and the photosensitive drum 149 and the developing roller are disposed on the other side of the rotation axis 3415, where the elastic member 139 is configured as a compression spring, that is, a force generated by the compression spring can force the photosensitive drum 149 and the developing roller to approach each other, so that a relatively stable space between the developing rollers of the cartridge of the photosensitive drum 149 can be maintained, and printing quality is ensured. In this embodiment, the distance between the rotating shaft 3415 and the photosensitive drum 149 or the developing roller is smaller than the distance between the rotating shaft 3415 and the elastic member 139, so that the arm length of the photosensitive drum 149 or the developing roller is smaller than the arm length of the force application point of the elastic member 139, the photosensitive drum 149 is located at the front end position in the front-back direction, and the photosensitive drum 149 is located between the developing roller and the rotating shaft 3415 in the front-back direction, the elastic member 139 can generate enough force to push the photosensitive drum 149 and the developing roller with a small force, the control precision is improved, and the force of the photosensitive drum 149 and the developing roller can be more stable when the process cartridge B vibrates, so that the relatively stable distance is better maintained.

It will be appreciated that, in order to ensure the stability of the structure of the process cartridge, the left end of the process cartridge is also provided with a shaft hole fitting structure coaxial with the right end, specifically, the first housing and the second housing have shaft hole structures, and are inserted into the shaft holes through shaft pins, so that the second housing can rotate relative to the first housing.

As shown in fig. 15 to 18, the process cartridge B includes a bracket 341 provided at a left end of the process cartridge B for supporting the coupling member 132, the bracket 341 includes a main body portion 3411, a centering portion 3412, and a guide projection 3413, the main body portion 3411 has a flat plate-like structure perpendicular to a left-right direction, a through hole for supporting the coupling member 132 is provided in the middle of the main body portion 3411, the centering portion 3412 is formed by bending and extending from the main body portion 3411, the guide projection 3413 is formed by extending from the centering portion 3412 in the left-right direction, the centering portion 3412 is provided separately from the main body portion 3411 in the left-right direction for centering the power output member 10 from an inclined position to a centering position when the process cartridge B is mounted in the electrophotographic image forming apparatus, wherein the centering portion 3413 can be rotated along with the first main body portion 3411, that is, a distance between the centering portion 3412 and the photosensitive drum 3412 does not change during rotation, the guide projection 3413 is formed by extending from the centering portion 3412 in the left-right direction, the guide projection 3412 is formed by extending from the centering portion 3412 in the left-right direction, when the process cartridge B is mounted in the electrophotographic image forming apparatus, the guide projection 3412 is mounted in the electrophotographic image forming apparatus, the guide projection is mounted on the guide projection 3 and the guide cover 40 can be smoothly moved along the guide opening 40, and the guide opening 40 can be smoothly moved along the guide opening 40, and the guide portion can be smoothly moved. The support 341 is further provided with the rotating shaft 3415 and the force receiving groove 3414, where the force receiving groove 3414 can receive an external force and drive the support 341 to rotate around the rotating shaft 3415, so as to drive the photosensitive drum 149 to move, so that the photosensitive drum 149 contacts with the developing roller. The process cartridge B further includes a first elastic member 342, the first elastic member 342 being disposed between the second casing 131 and the bracket 341 for restricting movement of the bracket 341 to move the photosensitive drum away 149 from the first casing 130. In the present embodiment, the first elastic member 342 is provided as an extension spring, and in other embodiments, may be provided as an elastic member such as a torsion spring or the like that can achieve the same function. Specifically, the holder 341 is movable between a first position and a second position such that the centering portion 3412 is brought into the opening of the cover 40, and when the holder 341 is in the first position, the cartridge B can normally print, the holder 341 is rotatable about the rotation shaft 3415 to be moved from the first position to the second position, and the centering portion 3412 is brought into the cover 40 by the first elastic member 342 to centering the power output member 10 from the inclined position to the centering position.

As shown in fig. 17 to 18, the process cartridge B further includes a movable member that is mounted on the second casing 131, and one end of which is capable of receiving a force from the outside so as to move relative to the second casing 131, and the other end of which abuts against the bracket 341 and restricts displacement of the bracket 341 relative to the second casing 131, thereby restricting displacement of the photosensitive drum 149 relative to the second casing 131. In the present embodiment, the movable member is configured as a slide 343, specifically, a chute 1311 is provided at the left end of the process cartridge B, the chute 1311 is provided on the second housing 131, and the slide 343 is slidably provided in the chute 1311 and movable relative to the second housing 131. The sliding member 343 includes a rod-shaped portion 3431, a force applying portion 3432 extending from one end of the rod-shaped portion 3431 in a bending manner, and a force receiving portion 3433 extending from the other end of the rod-shaped portion 3431 in the front-rear direction, wherein the force receiving portion 3433 is formed as a force receiving plane to receive external force, specifically, the force receiving portion 3433 of the sliding member 343 can receive pushing force of the door when the door is closed to move the sliding member 343, so that the force applying portion 3432 enters the force receiving groove 3414 to push the support 341 to move the support 341 to drive the photosensitive drum 149 to move near the first housing 130, and limit the support in the first position, so that the photosensitive drum 149 mounted on the support is limited in the first position, so that the photosensitive drum 149 is not displaced relative to the second housing 131, so that the photosensitive drum is not rocked or tilted during printing of the process cartridge in the electrophotographic image forming apparatus, and print quality is ensured. The second elastic member 344 is disposed between the sliding member 343 and the second housing 131, and in a state in which the sliding member 343 is not subject to an external force, the second elastic member 344 may force the sliding member 343 to rebound, thereby allowing the sliding member 343 to yield the displacement of the bracket 341. The left end of the process cartridge B is further provided with a cover 345, the cover 345 being mounted outside the second casing 131 and covering at least a portion of the slider 343. In other alternative embodiments, the movable member may apply a force to the support by rotation, elastic deformation, or the like to limit the movement of the support, and is not limited to sliding, and will not be described herein.

As shown in fig. 2, the specific process of mounting the process cartridge B into the electrophotographic image forming apparatus is such that, when the end user holds the process cartridge B in his hand and pushes it into the housing portion 70 along the mounting port 60 in the open position of the door, the process cartridge enters the housing portion 70 along the mounting rail, at which time the power take-off member 10 is in the inclined position and the retracted position, and the power take-off member 10 is blocked by the cover portion 40 so that the recess of the power take-off member 10 cannot protrude to engage with the coupling member 132, and in this process, the guide projection 3413 cooperates with the corresponding mounting rail and brings the centering portion 3412 along the predetermined rail, at which time the bracket 341 moves together with the centering portion 3412, and the centering portion 3412 enters and abuts the power take-off member 10 from the opening of the cover portion 40, and in this process, the bracket 341 moves from the second position to the first position a and returns to the second position after the centering portion 3412 centers the power take-off member 10. When the door is closed, the door pushes against the force receiving portion 3433 of the slider 343, so that the force applying portion 3432 enters the force receiving groove 3414 of the bracket 341 and pushes against the bracket 341 to move from the second position to the first position, so that the photosensitive drum 149 contacts the developing roller, and the centering portion 3412 gradually centers the power output member 10 from the inclined position. After the power take-off 10 starts to rotate, the power take-off gear 134 meshes with the power take-off gear teeth 11 of the power take-off to follow the rotation of the power take-off, and when the power take-off gear 134 continues to follow the rotation of the power take-off 10, the power take-off 10 is pulled out by the power take-off gear 134 from the retracted position to the extended position, so that the power take-off recess 12 is coupled with the coupling member 132, that is, when the coupling member 132 receives the driving force transmitted from the power take-off 10 to start driving the photosensitive drum 149 to rotate, the power transmission of the process cartridge B with the electrophotographic image forming apparatus is completed. Regarding the process of detaching the process cartridge B from the electrophotographic image forming apparatus, contrary to the above-described mounting process, a detailed description thereof will be omitted.

When the process cartridge is mounted in the electrophotographic image forming apparatus according to a predetermined mounting rail, the guide projection of the carriage of the process cartridge of the present invention guides the first rotation member to move from the first position to the second position so that the centering portion can enter the opening of the cover portion and abut against the power output member, and when the door is closed, the door abuts against the sliding member and the sliding member abuts against the carriage so that the carriage moves to the first position, and at this time, the centering portion centers the power output member to the centering position, and in this process, the photosensitive drum moves together with the carriage, thereby ensuring that the distance between the centering portion and the photosensitive drum does not change, and the power output member can be smoothly engaged with the coupling member.

The above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention 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 invention.

Claims (10)

1. A process cartridge detachably mountable to an electrophotographic image forming apparatus, said electrophotographic image forming apparatus including a tiltable power output member, said process cartridge comprising:

A photosensitive drum;

a coupling member configured to receive a driving force for driving the photosensitive drum to rotate;

The device is characterized by further comprising a bracket, wherein the bracket is used for supporting the photosensitive drum and can drive the photosensitive drum to move together between a first position for reducing the inclination angle of the power output piece relative to the photosensitive drum and a second position retracted from the first position.

2. A process cartridge according to claim 1, wherein said support is provided with a centering portion that follows the support to move together between said first position and said second position to control an inclination angle of said power output member.

3. A process cartridge according to claim 2, wherein said carriage is further provided with a guide projection formed extending in a left-right direction from said righting portion, said guide projection being engaged with a mounting rail in said electrophotographic image forming apparatus to guide movement of said carriage.

4. A process cartridge according to claim 1, wherein said holder includes a main body portion and a righting portion formed by bending and extending from said main body portion, said main body portion being provided separately from said righting portion in a left-right direction.

5. A process cartridge according to claim 1, further comprising a return member provided between said housing and said holder, said return member for providing a force for returning said holder from said second position to said first position.

6. A process cartridge according to claim 1, further comprising a slider which receives an external force and pushes against said holder to restrict said holder to said first position.

7. A process cartridge according to claim 6, wherein said slider includes a rod-like portion, a biasing portion extending from one end of said rod-like portion in a bending manner, and a force receiving portion extending from the other end of said rod-like portion in a front-rear direction.

8. A process cartridge according to claim 7, further comprising a first elastic member provided between said slider and said housing, said elastic member being capable of forcing said slider to move away from said bracket.

9. The process cartridge according to claim 1, further comprising a first housing and a second housing, wherein the holder is provided with a rotation shaft, a first shaft hole is formed in the first housing in an extending manner, a second shaft hole is provided in the second housing, the first shaft hole is mounted on the rotation shaft and the first shaft hole is provided coaxially with the rotation shaft, and the second shaft hole is mounted on the rotation shaft and the second shaft hole is provided coaxially with the rotation shaft, so that the first housing and the second housing can relatively rotate through the rotation shaft, the first shaft hole, and the second shaft hole.

10. A process cartridge according to claim 9, wherein a second elastic member is further provided between said first casing and said second casing, and a distance between said rotation shaft and said photosensitive drum is smaller than a distance between said rotation shaft and said second elastic member.