CN218037692U

CN218037692U - Processing box

Info

Publication number: CN218037692U
Application number: CN202222324677.3U
Authority: CN
Inventors: 刘志勇
Original assignee: Zhongshan Runhong Electronic Technology Co ltd
Current assignee: Zhongshan Runhong Electronic Technology Co ltd
Priority date: 2022-08-31
Filing date: 2022-08-31
Publication date: 2022-12-13
Anticipated expiration: 2032-08-31

Abstract

The utility model provides a detachably installs the processing box to electronic imaging equipment, including swing joint's sensitization drum box and development box, the development box includes the development casing and rotatably installs the developer roll in the development casing, the sensitization drum box includes sensitization casing and rotatably installs the sensitization drum in sensitization casing; when the processing box works, the developing roller and the photosensitive drum are close to each other, and when the processing box does not work, the developing roller and the photosensitive drum are far away from each other; the processing box also comprises a separating component, the separating component comprises a separating piece, a separating gear and a stressed gear which are combined with each other, the separating gear is provided with an elastic arm which is integrally formed with the separating gear, and the elastic arm can stretch along the axial direction of the separating gear; under the action of friction force between the separating gear and the stress gear, the separating gear rotates along with the stress gear, the developing roller and the photosensitive drum are separated from each other, required parts can be reduced, assembly is simple, meanwhile, the situation that the parts are easy to lose is reduced, loss is reduced, and cost is saved.

Description

Processing box

Technical Field

The utility model relates to an electronic imaging equipment field especially relates to a detachably installs the processing box in electronic imaging equipment and sets up the separable set in processing box.

Background

And a process cartridge detachably mountable to an electronic image forming apparatus (hereinafter, referred to as "apparatus") including a developing cartridge and a photosensitive drum cartridge coupled to each other, the developing cartridge including a developing casing accommodating a developer and a developing roller rotatably mounted on the developing casing, the photosensitive drum cartridge including a photosensitive casing and a photosensitive drum rotatably mounted on the photosensitive casing, the developing roller for opposing the photosensitive drum and supplying the developer to the photosensitive drum to develop an electrostatic latent image on a surface of the photosensitive drum.

The process cartridge further includes a separation member at a longitudinal end for separating the developing roller and the photosensitive drum from each other to protect a surface of the photosensitive drum from contamination by the developer.

The separating assembly comprises a separating piece, a separating gear and a stressed gear, and a deformable thin steel sheet is assembled between the separating gear and the stressed gear to increase the friction force between the separating gear and the stressed gear, so that the separating gear can be driven by the stressed gear to rotate under the action of the friction force. However, the technology has many parts, which not only makes the assembly complicated, but also makes the steel sheet easy to lose because of its small size.

SUMMERY OF THE UTILITY MODEL

The utility model provides a processing box to solve the technical problem that the assembly is complicated, concrete scheme is:

the processing box is detachably mounted to the electronic imaging equipment and comprises a movably connected photosensitive drum box and a developing box, wherein the developing box comprises a developing shell and a developing roller which is rotatably mounted on the developing shell, and the photosensitive drum box comprises a photosensitive shell and a photosensitive drum which is rotatably mounted on the photosensitive shell; when the processing box works, the developing roller and the photosensitive drum are close to each other, and when the processing box does not work, the developing roller and the photosensitive drum are far away from each other; the processing box further comprises a separating assembly, the separating assembly comprises a separating piece, a separating gear and a stressed gear which are combined with each other, the separating gear is provided with an elastic arm which is integrally formed with the separating gear, and the elastic arm can stretch along the axial direction of the separating gear.

The separating gear is clamped by the separating piece and the stressed gear, and the separating piece can be abutted against the elastic arm and enables the separating gear to move along the axial direction.

The separating gear further comprises a separating gear main body part and a gear part which are combined with each other, the separating gear main body part is provided with a first surface and a second surface which are oppositely arranged in the axial direction, the first surface is opposite to the connecting surface of the separating piece, and the second surface is opposite to the stressed gear; the gear portion has teeth for receiving a driving force.

Before the separation assembly is assembled, the elastic arm protrudes rightwards from the first surface when viewed along the radial direction of the separation gear.

The separating part comprises a separating part main body part, a connecting surface is arranged on one side, facing the processing box, of the separating part main body part, the connecting surface is opposite to the separating gear, and the connecting surface is abutted to the elastic arm.

Before the separation assembly is assembled, the elastic arm protrudes to the left from the second surface when viewed along the radial direction of the separation gear.

The force-receiving gear is provided with a concave portion having a concave surface opposite to the second surface.

The utility model adopts the above technical scheme, the atress gear revolve is followed to the separating gear under its and the frictional force effect between the atress gear to realize keeping away from each other of developer roll and sensitization drum, reducible required spare part makes the assembly simple, reduces the condition that spare part easily lost simultaneously, reduces the loss, practices thrift the cost.

Drawings

Fig. 1 is a perspective view of a process cartridge according to the present invention.

Fig. 2 is a partially exploded view of the process cartridge according to the present invention.

Fig. 3 is a schematic view of a separation assembly according to the present invention.

Fig. 4A and 4B are perspective views of the separator according to the present invention.

Fig. 5A and 5B are perspective views of a separation gear according to the present invention.

Fig. 5C is a schematic view of the separating gear according to the present invention when viewed in the radial direction.

Fig. 6A and 6B are perspective views of the force receiving gear according to the present invention.

Fig. 7 is a perspective view of the developing roller gear according to the present invention.

Fig. 8 is a perspective view of the first developing end cap according to the present invention.

Fig. 9 is a perspective view of the first photosensitive end cap according to the present invention.

Fig. 10A and 10B are schematic views of the process cartridge according to the present invention, when viewed from right to left, with parts hidden therein.

Fig. 11A and 11B are schematic views of the process cartridge according to the present invention, when viewed from left to right, with a part of the part hidden therein.

Fig. 12A and 12B are sectional views of the process cartridge according to the present invention, viewed from the left to the right, after being cut along a plane perpendicular to the left-right direction.

Detailed Description

Fig. 1 is a perspective view of a process cartridge according to the present invention; fig. 2 is a partially exploded view of a process cartridge according to the present invention; fig. 3 is a schematic view of the separation assembly according to the present invention in combination with a developing roller gear.

As shown in fig. 1, 2 and 3, the process cartridge 100 includes a movably coupled photosensitive drum cartridge 1 and a developing cartridge 2, the developing cartridge 2 includes a developing housing 20 and a developing roller 21 rotatably mounted on the developing housing 20, the photosensitive drum cartridge 1 includes a photosensitive housing 10 and a photosensitive drum 11 rotatably mounted on the photosensitive housing 10, and for convenience of description, a direction in which the photosensitive drum cartridge 1 is directed toward the developing cartridge 2 is defined as a front direction, and a direction in which the developing cartridge 2 is directed toward the photosensitive drum cartridge 1 is defined as a rear direction. The developing casing 20 can be used to contain developer, the developing roller 21 has a rotation axis L3, the photosensitive drum 11 has a rotation axis L1, the developing roller 21 is disposed opposite to the photosensitive drum 11, and when the developing roller 21 and the photosensitive drum 11 are close to each other, the developing roller 21 supplies the developer to the surface of the photosensitive drum 11 to develop the electrostatic latent image on the surface of the photosensitive drum 11.

The process cartridge 100 further includes a first driving head 111, a second driving head 4, and a driving gear 41 provided at longitudinal ends, the first driving head 111 being provided at the longitudinal end of the photosensitive drum cartridge 1 for receiving a driving force supplied from the apparatus and driving the photosensitive drum 11 to rotate about its rotational axis L1; the second driving head 4 is provided at a longitudinal end of the developing cartridge 2 for receiving a driving force supplied from the apparatus; the drive gear 41 is formed integrally with the second drive head 4, and serves to transmit the driving force received by the second drive head 4 to the developing roller 21, rotating the developing roller 21 about its rotational axis L3.

The process cartridge 100 further includes a first developing end cap 31 and a second developing end cap 32 disposed at the longitudinal ends of the developing cartridge 2, and a first photosensitive end cap 33 and a second photosensitive end cap 34 disposed at the longitudinal ends of the photosensitive drum cartridge 1, wherein the first photosensitive end cap 33 and the first developing end cap 31 are disposed on the same side, the second photosensitive end cap 34 and the second developing end cap 32 are disposed on the same side, the first driving head 111 can be exposed from the first photosensitive end cap 33, and the second driving head 4 can be exposed from at least one of the first developing end cap 31 and the first photosensitive end cap 33, so as to receive the driving force provided by the apparatus. For convenience of description, a direction in which the first developing cap 31 is directed toward the second developing cap 32 is defined as a left direction, a direction in which the second developing cap 32 is directed toward the first developing cap 31 is defined as a right direction, and the left-right direction is parallel to the axial direction of the developing roller 21 and the photosensitive drum 11.

The process cartridge 100 further includes a handle 12, and the handle 12 may be provided at the photosensitive drum 10 or the developing drum 20 for mounting and dismounting the process cartridge 100. For convenience of description, the direction in which the developing roller 21 is directed to the handle 12 is defined as an upper direction, the direction in which the handle 12 is directed to the developing roller 21 is defined as a lower direction, and the up-down direction, the left-right direction, and the front-rear direction are perpendicular to each other two by two.

The process cartridge 100 further includes a separation member 6 provided therein, the separation member 6 being for separating the developing roller 21 and the photosensitive drum 11 from each other, the separation member 6 including a separation member 61, a separation gear 62, and a force receiving gear 63 which are coupled to each other, as shown in fig. 2 and 3, the separation gear 62 being sandwiched by the separation member 61 and the force receiving gear 63; the separator assembly 6 may be rotated in either a clockwise or counterclockwise direction when viewed from right to left in the left-right direction. The separating member 61 may be combined with the first photosensitive end cap 33 to separate the developing roller 21 and the photosensitive drum 11 from each other, the separating gear 62 may be opposed to the driving gear 41, and the force receiving gear 63 may be engaged with the driving gear 41 to receive the driving force.

The process cartridge 100 further includes a developing roller gear 5 provided at a longitudinal end of the developing roller 21, the developing roller gear 5 being adapted to engage with the force receiving gear 63 to receive a driving force to rotate the developing roller 21 about the rotational axis L3 thereof.

As shown in fig. 4A and 4B, the separating member 61 includes a separating member main body portion 611 and a notch portion 612 provided in the separating member main body portion 611, a side of the separating member main body portion 611 facing the process cartridge 100 is provided with a connecting surface 611a, and the connecting surface 611a is used to be opposite to the separating gear 62; the separating member main body 611 is further provided with a through hole 613, the through hole 613 is used for being matched with the force-receiving gear 63, the through hole 613 is provided with a clamping portion 613a along the inner circumferential direction, the clamping portion 613a is used for being combined with the force-receiving gear 63, so that the separating member 61 is installed, in the embodiment, the clamping portion 613a is a protrusion, and in other embodiments, the clamping portion 613a is a groove.

A contact portion 614 is further provided along the outer circumferential direction of the separating member main body portion 611, the contact portion 614 is provided adjacent to the notched portion 612 for engaging with the first photosensitive end cap 33 to separate the developing roller 21 and the photosensitive drum 11 from each other, the separating member 61 is of a cam structure as viewed along the axial direction of the separating member 61, and the contact portion 614 protrudes radially from the separating member main body portion 611. The contact portion 614 has a contact surface 614a, and a first limiting portion 614b and a second limiting portion 614c respectively located at two end portions of the contact portion 614 along the rotation direction of the separating assembly 6, the contact surface 614a is an arc surface for combining with the first photosensitive end cap 33, the first limiting portion 614b and the second limiting portion 614c are respectively for combining with the first developing end cap 31, the contact portion 614 further has a guiding surface 614d, and the guiding surface 614d is used for guiding the contact portion 614 to combine with the first photosensitive end cap 33. When the first stopper 614b is engaged with the first developing end cap 31, the movement of the separating member 61 in the counterclockwise direction is restricted when viewed from the right to the left, and the developing roller 21 and the photosensitive drum 11 approach each other; when the second stopper 614c is engaged with the first developing end cap 31, the movement of the separating member 61 in the clockwise direction is restricted and the developing roller 21 and the photosensitive drum 11 are away from each other when viewed from the right to the left.

The notched portion 612 is configured to face the separation gear 62, the notched portion 612 includes a first coupling portion 612a and a second coupling portion 612b, and the first coupling portion 612a and the second coupling portion 612b are coupled to the separation gear 62. When the first coupling portion 612a is coupled to the separation gear 62, the developing roller 21 and the photosensitive drum 11 are away from each other; when the second engaging portion 612b engages with the separation gear 62, the developing roller 21 and the photosensitive drum 11 approach each other.

Fig. 5A and 5B are perspective views of a separation gear according to the present invention; fig. 5C is a schematic view of the separating gear according to the present invention as viewed in the radial direction.

As shown in fig. 5A, 5B, 5C, the separating gear 62 is configured to be coupled to the force receiving gear 63, and includes a separating gear main body portion 621 and a gear portion 623 coupled to the separating gear main body portion 621, the separating gear main body portion 621 has a first surface 621a and a second surface 621B oppositely disposed in the axial direction, the first surface 621a is configured to be opposite to the connection surface 611a of the separating member 61, and the second surface 621B is configured to be opposite to the force receiving gear 63; the separation gear main body portion 621 is provided with an engaging portion 622, and the engaging portion 622 is used for engaging with the force receiving gear 63 so that the separation gear 62 is mounted; the separating gear body 621 is further provided with a penetrating part 624, the penetrating part 624 penetrates through the left and right ends of the separating gear 62, an elastic arm 625 integrally formed with the separating gear 62 is arranged in the penetrating part 624, before the separating assembly 6 is assembled, the elastic arm 625 protrudes rightward from the first surface 621a when viewed in the radial direction of the separating gear 62, the elastic arm 625 can stretch and contract in the axial direction of the separating gear 62, when the separating assembly 6 is assembled, the connecting surface 611a of the separating piece 61 is opposite to the first surface 621a, the connecting surface 611 abuts against the elastic arm 625 and presses the elastic arm 625 in the direction close to the second surface 621b (i.e. leftward), so that the elastic arm 625 does not protrude from the first surface 621a (as shown in fig. 5C by 625'), because the elastic arm 625 is arranged on the separating gear 62, the elastic arm 625 is pressed leftward while the separating gear 62 has a tendency to move leftward; in other embodiments, the elastic arm 625 may protrude leftwards from the second surface 621b. In this embodiment, the elastic arm 625 preferably protrudes rightward from the first surface 621a because the force-receiving gear 63 may generate an uneven surface during the injection molding process, the second surface 621b is opposite to the uneven surface, when the elastic arm 625 protrudes leftward and contacts with the uneven surface, during the operation of the processing box 100, the force-receiving gear 63 may swing, and the elastic arm 625 protrudes rightward and may not be combined with the uneven surface, and the force-receiving gear 63 may not swing, which may prevent the generation of imaging defects such as gear lines.

The gear portion 623 is configured to mesh with/oppose the drive gear 41, and to receive a driving force provided by the apparatus when meshing, and the gear portion 623 projects radially from the separation gear main body portion 621 as viewed in the axial direction of the separation gear 62. Preferably, the gear portion 623 extends from the first surface 621a in the axial direction to a side away from the process cartridge 100. The gear portion 623 has teeth for meshing with the drive gear 41 so that the separating gear 62 is rotatable, and at both ends of the teeth in the rotational direction of the separating assembly 6, the gear portion 623 is provided with a first missing tooth portion 623a and a second missing tooth portion 623b, and at both free ends of the gear portion 623 in the rotational direction of the separating assembly 6, the gear portion 623 is provided with a first coupled portion 623c and a second coupled portion 623d, the first coupled portion 623c being for coupling with the first coupling portion 612a of the separating member 61, and the second coupled portion 623d being for coupling with the second coupling portion 612b of the separating member 61. When the first tooth-lacking portion 623a is opposed to the drive gear 41 and the second coupled portion 623d is coupled to the second coupling portion 612b, the developing roller 21 and the photosensitive drum 11 approach each other; when the second toothless portion 623b faces the drive gear 41 and the first coupled portion 623c is coupled to the first coupling portion 612a, the developing roller 21 and the photosensitive drum 11 are separated from each other.

As shown in fig. 6A and 6B, the force-receiving gear 63 has a force-receiving gear portion 631, the force-receiving gear portion 631 having an end surface 631a facing the process cartridge 100, the end surface 631a being for opposing the developing roller gear 5, and a mounting post 632. The free end of the mounting post 632, which is far from the processing box 100, is provided with a clamped portion 632a, and the clamped portion 632a is used for being clamped with the clamping portion 613a of the separating member 61, so that the separating member 61 is mounted; in this embodiment, the clamping portion 613a is a protrusion, and the clamped portion 632a is a groove, in other embodiments, the clamping portion 613a is a groove, and the clamped portion 632a is a protrusion. An end portion opposite to the engaged portion 632a is provided with an engaged portion 632b, the engaged portion 632b extends outward in the radial direction from the mounting post 632, and the outer diameter of the engaged portion 632b is larger than the outer diameter of the mounting post 632 as viewed in the axial direction of the force receiving gear 63; the fitted portion 632b is for fitting with the fitting portion 622 of the separation gear 62, so that the separation gear 62 is mounted. The mounting post 632 has a through hole 633, and the through hole 633 is used to combine with the first developing cap 31, so that the force receiving gear 63 is supported.

The force receiving gear 63 is further provided with a concave portion 634, the concave portion 634 is used for matching with the separating gear main body portion 621, the concave portion 634 has a concave surface 634a, and the second surface 621b of the separating gear main body portion 621 is opposite to the concave surface 634 a; the force-receiving gear 63 is further provided with two large protrusions 635, and in this embodiment, the two large protrusions 635 are symmetrically arranged and are used for being combined with the developing roller gear 5 so that the force-receiving gear 63 drives the developing roller gear 5 to rotate when rotating. In some embodiments, the force receiving gear 63 is further provided with a projection 635a, and the projection 635a extends from the end face 631a to a side close to the process cartridge 100 in the axial direction and can perform a positioning function when combined with the developing roller gear 5. The large protrusion 635 may protrude from at least one of the end surface 631a and the protrusion 635 a.

As shown in fig. 7, the developing roller gear 5 has a pinion gear portion 51 and a mounting hole 52, the pinion gear portion 51 having a distal end surface 511 facing the force receiving gear 63, the distal end surface 511 being for opposing an end surface 631a of the force receiving gear 63; the mounting hole 52 is for cooperating with the developing roller 21 to support and drive the developing roller 21. The developing roller gear 5 is further provided with two small protrusions 53, and in this embodiment, the two small protrusions 53 are symmetrically arranged and can abut against the large protrusion 635 of the force-bearing gear 63 to receive the driving force transmitted by the force-bearing gear 63 and drive the developing roller 21 to rotate. In some embodiments, the developing roller gear 5 is further provided with a projection 531, and the projection 531 extends from the distal end surface 511 in the axial direction to a side away from the process cartridge 100, and may function as a guide. The small projection 53 may project from at least one of the end face 511 and the projection 531.

As can be seen from the above, the assembly steps of the separating assembly 6 are:

1. the second surface 621b of the separating gear 62 is opposite to the recess 634 of the force-receiving gear 63, and the fitting portion 622 passes through the mounting post 632, so that the separating gear main body portion 621 is placed in the recess 634;

2. the connecting surface 611a of the separating member 61 is opposite to the first surface 621a of the separating gear 62, the through hole 613 passes through the mounting post 632, and the clamping portion 613a is slightly clamped with the clamped portion 632a to ensure that the separating member 61 does not fall off, so that the separating gear 62 is clamped between the force-bearing gear 63 and the separating member 61.

After the separation assembly 6 is installed, since the force-receiving gear 63 is restricted from moving in the axial direction, the elastic arm 625 of the separation gear 62 is pressed and elastically deformed by the separation member 61 toward the side close to the force-receiving gear 63, so that the separation gear 62 has a tendency to move toward the force-receiving gear 63, and thus the pressure toward the force-receiving gear 63 increases, so that the friction between the separation gear 62 and the force-receiving gear 63 increases.

Fig. 8 is a perspective view of a first developing end cap according to the present invention; fig. 9 is a perspective view of the first photosensitive end cap according to the present invention.

As shown in fig. 8, the first developing head 31 is provided with a first through hole 311 and a mounting portion 312, the first through hole 311 being usable to expose the second driving head 4 to the outside to receive the driving force supplied from the apparatus; the mounting portion 312 is used to be coupled with the through hole 633 of the force receiving gear 63 so that the force receiving gear 63 is supported. The first developing end cap 31 is further provided with a first limiting surface 313 and a second limiting surface 314, the first limiting surface 313 and the second limiting surface 314 are used for being combined with the separating member 61, specifically, the first limiting surface 313 is combined with the first limiting portion 614b, and the second limiting surface 314 is combined with the second limiting portion 614 c.

As shown in fig. 9, the first photosensitive end cap 33 is provided with an avoiding hole 331 and a second through hole 332, and the avoiding hole 331 is coaxially disposed with the first through hole 311, and is used for exposing the second driving head 4 outwards; the second through hole 332 serves to expose the first driving head 111 to the outside to receive the driving force provided from the apparatus. The first photosensitive cover 33 is further provided with a force receiving portion 333, the force receiving portion 333 being for engaging with the contact portion 614 of the separating member 61, receiving the urging force of the separating member 61 to separate the developing roller 21 and the photosensitive drum 11 from each other, the force receiving portion 333 having a force receiving surface 333a, the force receiving surface 333a abutting against the contact surface 614a of the contact portion 614.

Fig. 10A and 10B are schematic views of the process cartridge according to the present invention, viewed from right to left, with parts hidden therein;

fig. 11A and 11B are schematic views of the process cartridge according to the present invention, viewed from left to right, with a part of the part hidden therein; fig. 12A and 12B are sectional views of the process cartridge of the present invention, viewed from the left to the right, after being cut along a plane perpendicular to the left-right direction.

When the process cartridge 100 is normally operated after being mounted, the developing roller 21 and the photosensitive drum 11 are close to each other, and when viewed from right to left in the left-right direction, the photosensitive drum 11 rotates clockwise about the rotational axis L1 due to the driving force provided by the apparatus, the drive gear 41 rotates clockwise about the rotational axis L2 due to the driving force provided by the apparatus, and the developing roller 21 receives the driving force transmitted by the drive gear 41 and rotates counterclockwise about the rotational axis L3.

Fig. 10A, 11A, 12A show a state in which the developing roller 21 and the photosensitive drum 11 are close to each other when the process cartridge 100 is operated. As shown in fig. 10A, the driving gear 41 receives the driving force provided by the apparatus to rotate in the clockwise direction, first transmits the driving force to the force receiving gear 63 and rotates the force receiving gear 63 in the counterclockwise direction, and the friction force between the separating gear 62 and the force receiving gear 63 can cause the separating gear 62 to rotate by an angle in the counterclockwise direction following the force receiving gear 63, so that the first tooth-missing portion 623a of the separating gear 62 is opposite to the driving gear 41, that is, the teeth of the separating gear 62 are not engaged with the driving gear 41. In the present embodiment, the frictional force between the separating gear 62 and the force receiving gear 63 is not sufficient to continuously rotate the separating gear 62, and therefore, there may be the following cases:

first, the separating gear 62 rotates counterclockwise by the friction until the first tooth-lacking portion 623a is opposite to the driving gear 41, and when the second engaged portion 623d is not engaged with the second engaging portion 612b of the separating member 61, the separating gear 62 stops rotating, the process cartridge 100 continues to operate, and both the separating member 61 and the separating gear 62 are kept stationary.

Secondly, the separating gear 62 rotates in the counterclockwise direction until the first toothless portion 623a opposes the driving gear 41 due to the frictional force, because the frictional force is insufficient to push the separating member 61 to rotate any more, when the second engaged portion 623d engages with the second engaging portion 612b of the separating member 61, the separating gear 62 is blocked by the separating member 61 to stop rotating, the process cartridge 100 continues to operate, and the separating member 61 and the separating gear 62 are both kept stationary.

Thirdly, the separating gear 62 rotates counterclockwise until the first tooth-lacking portion 623a is opposite to the driving gear 41 under the action of the friction force, and after the second engaged portion 623d is engaged with the second engaging portion 612b of the separating member 61, the friction force can further push the separating member 61 to rotate until the first limiting portion 614b abuts against the first limiting surface 313 of the first developing end cap 31 (as shown in fig. 11A), and then the separating member 61 and the separating gear 62 stop.

When the process cartridge 100 is normally operated, the developing roller 21 and the photosensitive drum 11 are close to each other at the point Q (as shown in fig. 10A, 12A), and the distance s1 is set between the rotational axis L3 of the developing roller 21 and the rotational axis L1 of the photosensitive drum 11 in the front-rear direction (as shown in fig. 11A).

Fig. 10B, 11B, 12B show a state in which the developing roller 21 and the photosensitive drum 11 are away from each other when the process cartridge 100 is not operated. As shown in fig. 10B, when the process cartridge 100 stops, the driving gear 41 receives the driving force in the reverse direction to rotate in the counterclockwise direction and bring the force receiving gear 63 into rotation in the clockwise direction, and the friction force between the separating gear 62 and the force receiving gear 63 causes the separating gear 62 to rotate in the clockwise direction by an angle following the force receiving gear 63, and the first missing tooth portion 623a of the separating gear 62 passes over the driving gear 41, so that the teeth of the separating gear 62 start to mesh with the driving gear 41; at this time, the driving gear 41 is simultaneously engaged with the force receiving gear 63 and the separating gear 62, and drives the force receiving gear 63 to rotate in the clockwise direction simultaneously with the separating gear 62, and the first engaged portion 623c of the separating gear 62 is engaged with the first engaging portion 612a of the separating member 61 during the rotation of the separating gear 62 in the clockwise direction; under the driving force, the separating member 61 also rotates in the clockwise direction, when the engagement between the separating gear 62 and the driving gear 41 is finished, the second tooth-lacking portion 623B of the separating gear 62 is opposite to the driving gear 41, the separating gear 62 and the separating member 61 stop rotating, and at this time, the contact portion 614/contact surface 614a of the separating member 61 abuts against the force receiving portion 333/force receiving surface 333a of the first photosensitive end cap 33 and pushes the developing roller 21 itself away from the photosensitive drum 11, that is, the developing roller 21 and the Q point on the photosensitive drum 11 are away from each other (as shown in fig. 10B and fig. 12B); if the separating gear 62 continues to rotate by an angle due to friction after the engagement of the separating gear 62 with the drive gear 41 is completed, the separating member 61 does not stop rotating, and in this case, the separating member 61 stops rotating when the second stopper portion 614c abuts against the second stopper surface 314 of the first developing cover 31 (as shown in fig. 11B), and the separating gear 62 stops rotating, so that the developing roller 21 and the photosensitive drum 11 can be surely separated from each other. The distance between the rotation axis L3 of the developing roller 21 and the rotation axis L1 of the photosensitive drum 11 in the front-rear direction is s1' (as shown in fig. 11B).

In a state where the developing roller 21 and the photosensitive drum 11 are away from each other, s1' is larger than s1.

The utility model adopts the above technical scheme, the separation gear follows atress gear revolve under its and the frictional force effect between the atress gear to realize keeping away from each other of developer roll and sensitization drum, reducible required spare part makes the assembly simple, reduces the condition that spare part easily loses simultaneously, reduces the loss, practices thrift the cost.

Claims

1. The processing box is detachably mounted on the electronic imaging equipment and comprises a movably connected photosensitive drum box and a developing box, wherein the developing box comprises a developing shell and a developing roller rotatably mounted on the developing shell, and the photosensitive drum box comprises a photosensitive shell and a photosensitive drum rotatably mounted on the photosensitive shell; when the processing box works, the developing roller and the photosensitive drum are close to each other, and when the processing box does not work, the developing roller and the photosensitive drum are far away from each other; it is characterized in that the utility model is characterized in that,

the processing box further comprises a separating assembly, the separating assembly comprises a separating piece, a separating gear and a stressed gear which are combined with each other, the separating gear is provided with an elastic arm which is integrally formed with the separating gear, and the elastic arm can stretch along the axial direction of the separating gear.

2. A process cartridge according to claim 1, wherein said separation gear is held by a separating member and the force receiving gear, and said separating member is adapted to abut against the elastic arm and move the separation gear in the axial direction.

3. A process cartridge according to claim 2, wherein said separation gear further includes a separation gear main body portion and a gear portion which are coupled to each other, said separation gear main body portion having a first surface and a second surface which are disposed oppositely in the axial direction, said first surface being opposed to the coupling face of the separating member, said second surface being opposed to the force receiving gear; the gear portion has teeth for receiving a driving force.

4. A process cartridge according to claim 3, wherein said elastic arm projects rightward from the first surface as viewed in a radial direction of the separation gear before the separation member is assembled.

5. A process cartridge according to claim 4, wherein said separating member includes a separating member main body portion, a side of said separating member main body portion facing the process cartridge is provided with a connecting surface, said connecting surface is opposed to the separating gear, and said connecting surface abuts against the elastic arm.

6. A process cartridge according to claim 3, wherein said elastic arm projects leftward from the second surface as viewed in a radial direction of the separation gear before the separation member is assembled.

7. A process cartridge according to claim 3, wherein said force receiving gear is provided with a concave portion having a concave surface, said concave surface being opposed to the second surface.