CN212781681U

CN212781681U - Processing box

Info

Publication number: CN212781681U
Application number: CN202021475361.9U
Authority: CN
Inventors: 卢敬坤; 李坤
Original assignee: Individual
Current assignee: Individual
Priority date: 2018-09-18
Filing date: 2019-07-11
Publication date: 2021-03-23
Anticipated expiration: 2029-07-11
Also published as: EP3845968A1; CN212781682U; CN211293617U; CN110989311A; WO2020057522A1; CN110908263A; CN212781680U; DE202019005994U1; CN211375325U; EP3845968A4

Abstract

The present patent relates to a process cartridge including a developing unit, a photosensitive unit; the developing unit comprises a developing element, the photosensitive unit comprises a photosensitive element, and the processing box further comprises a control unit. The developing member may be separated from the photosensitive member by the control unit.

Description

Processing box

The patent application is a divisional application of a utility model patent application with a patent application date of 2019, 7, month and 11, and an application number of CN 201921090008.6.

Technical Field

The present invention relates to a process cartridge on an image forming apparatus.

Background

The related art image forming apparatus is provided with a photosensitive driving member and a developing driving member, and a process cartridge is detachably mounted to the image forming apparatus and receives a driving force from the image forming apparatus to drive the photosensitive member and the developing member on the process cartridge.

Disclosure of Invention

A primary object of the present invention is to provide a structure that can control the distance between a photosensitive-element driving head and a developing-element driving head. The concrete structure is as follows:

a process cartridge includes a developing unit, a photosensitive unit; including developing element on the developing unit, including photosensitive element on the photosensitive unit, its characterized in that, processing box still includes the control unit, the control unit includes control element, works as control element is in when being close to or keeping away from developing unit, developing element keeps away from or is close to photosensitive element.

The control unit comprises a control element movable between a first position and a second position; when the control element is at the first position, the control element is far away from the developing unit, and the photosensitive element is contacted with the developing element; when the control member is in the second position, where the control member is closer to the developing unit than when the control member is in the first position, the developing member is not in contact with the photosensitive member.

The control unit comprises a control element movable between a first position and a second position; when the control element is at the first position, the control element is far away from the developing unit, and the developing element is close to the photosensitive element; when the control member is in the second position, the control member is closer to the developing unit than when the control member is in the first position, and the developing member is farther from the photosensitive member.

The control member is disposed on the developing unit and extends outside the developing unit to receive an external force.

The control unit includes a first gear element, a second gear element, and a third gear element provided in a developing unit of the process cartridge; and the first gear element, the second gear element and the third gear element are all provided with gears; the first gear element is provided with a swing rod, and the swing rod can control the rotation of the first gear element; the swing rod is a control element; the gear on the second gear element is meshed with the gear on the first gear element and transmits power; the gear on the third gear element is meshed with the gear on the second gear element and transmits power; the third gear element is provided with a cam part which can rotate along with the third gear element; the rotation of the swing link controls the cam portion to abut against or not abut against the photosensitive unit, thereby controlling the distance or approach of the developing element and the photosensitive element.

The control unit comprises a push rod and an ejector rod; the push rod is a control element; the push rod is provided with a rotating shaft, the ejector rod is provided with a rotating shaft, and the push rod is hinged with the ejector rod; the push rod and the ejector rod are both arranged on the developing unit; one end of the ejector rod is connected with the push rod, and the other end of the ejector rod extends out towards the photosensitive unit; the push rod extends out of the developing unit; the rotation of the push rod around the rotating shaft of the push rod controls the rotation of the push rod, so that the push rod is not abutted or extruded with the photosensitive unit, and the developing element is close to or far away from the photosensitive element.

The control unit comprises a first pressure lever, a second gear element and a third gear element; the first pressure lever is provided with a rack part, the rack part is meshed with the second gear element, and the second gear element is meshed with the third gear element; a cam portion is provided on the third gear element; the first pressure lever extends out of the developing unit and is provided with an inclined plane; the first pressure lever is a control element; the first pressure lever receives external force to enable the first pressure lever to be close to or far away from the developing unit, so that the cam portion is engaged with or disengaged from the photosensitive unit, and the developing element is controlled to be far away from or close to the photosensitive element.

The control unit comprises a first pressure lever and a second ejector rod; the first pressure lever is a control element; the first pressure lever is movable on the developing unit and is provided with an inclined surface; the second ejector rod rotates around a rotating shaft arranged on the developing unit; the first pressure lever receives external force to enable the first pressure lever to be close to or far away from the developing unit, so that the second push rod is abutted or not abutted with the photosensitive unit, and the developing element is controlled to be far away from or close to the photosensitive element.

Drawings

Fig. 1 and 2 are schematic views of a developing member and a photosensitive member of a process cartridge in a first embodiment of the present patent when the developing member and the photosensitive member are separated from each other;

fig. 3 and 4 are schematic structural diagrams of a second embodiment of the present patent application, respectively;

FIGS. 5 to 7 are schematic structural diagrams of a third embodiment of the present patent application, respectively;

FIGS. 8-11 are schematic structural diagrams of a fourth embodiment of the present patent application;

FIGS. 12-14 are schematic structural diagrams of a fifth embodiment of the present patent application;

FIG. 15 is a schematic structural diagram of a sixth embodiment of the present patent;

FIG. 16 is a schematic structural diagram of a seventh embodiment of the present patent;

fig. 17-27 are schematic diagrams illustrating the structure and operation of the eighth embodiment of the present patent, respectively.

Detailed Description

The invention will be explained with reference to the drawings and examples, which are provided only for explaining the invention and are not intended to limit the invention.

The first embodiment is as follows:

as shown in fig. 1, the process cartridge is provided with a developing unit 41 and a photosensitive unit 31, the developing unit 41 is provided with a developing element 42, and the photosensitive unit 31 is provided with a photosensitive element 32. The developing unit 41 may be close to or distant from the photosensitive unit 31 so that the developing member 42 is in contact with or not in contact with (i.e., separated from) the photosensitive member 32; as shown in fig. 1, the developing unit 41 is rotated about the rotary shaft 46b to bring the developing member 42 into contact with or out of contact with (i.e., separate from) the photosensitive member 32. An elastic member 95 is further provided between the developing unit 41 and the photosensitive unit 31, and the elastic member 95 provides an elastic force to the developing unit 41 and the photosensitive unit 31, thereby rotating the developing unit 41 about the rotary shaft 46b and bringing the developing member 42 close to and in contact with the photosensitive member 32.

As shown in fig. 1, the image forming apparatus (i.e., printer, copier, facsimile machine, etc.) is provided with a power applying element 61; the power applying member 61 is rotatable about its own rotation shaft 61 a.

The processing box is also provided with a control unit, and the control unit comprises a push rod 10, a rotating rod 20 and a push rod 30; the push rod 10 is connected with the rotating rod 20 through a hinge joint 10 a; the rotating rod 20 can rotate around a rotating shaft 20 a; one end of the top rod 30 is connected with the rotating rod 20 through a hinge 20 b; the push rod 30 is rotatable about a rotation shaft 30a, the other end of the push rod 30 abuts against the developing unit 41, the position of the developing unit 41 abutting against the push rod 30 is located on the other side of the rotation shaft 46b with respect to the push rod 10, and the force required for separating the developing unit 41 is smaller as the position of the developing unit 41 abutting against the push rod 30 is farther from the rotation shaft 46 b. The control units (the push rod 10, the rotating rod 20 and the push rod 30) are all arranged on the photosensitive unit 31.

As shown in fig. 1, when the power applying member 61 on the image forming apparatus is not in contact with the push lever 10 and applies a force to the push lever 10, the elastic member 95 rotates the developing unit 41 about the rotary shaft 61a to bring the developing unit 41 close to the photosensitive unit 31, so that the developing member 42 is in contact with the photosensitive element 32.

As shown in fig. 2, when the power time element 61 rotates to abut against the push rod 10 and provide a thrust force for the push rod 10, the push rod 10 moves in the direction of the drawing a, so as to drive the rotating rod 20 to rotate around the rotating shaft 20a in the direction of the drawing B, then the push rod 30 rotates around the rotating shaft 30a in the direction of the drawing C under the action of the rotating rod 20, and finally the push rod 30 pushes the developing unit 41 to rotate around the rotating shaft 61 a; the rotation of the developing unit 41 moves the developing member 42 in a direction away from the photosensitive member 32, eventually bringing the developing member 42 out of contact (separation) with the photosensitive member 32 and forming a distance L.

By providing the control unit on the photosensitive unit 31, the power of the power applying member 61 positioned above the photosensitive element 32 can be converted into the rotational power of the developing unit 41, so that the developing element 42 is separated from the photosensitive element 32.

When the power applying member 61 is rotated about its rotation shaft 61a (i.e., rotated from the position shown in fig. 2 to the position shown in fig. 1) and no longer abuts against the push rod 10 and provides a pushing force, the developing unit 41 is rotated about the rotation shaft 46B by the elastic member 95 and returns to the state shown in fig. 1, the push rod 30 is rotated about the rotation shaft 30a (rotated in the direction opposite to the direction indicated by the arrow C in fig. 2) after being pushed by the developing unit 41, and simultaneously the rotating rod 20 is rotated about the rotation shaft 20a (rotated in the direction opposite to the direction indicated by the arrow B in fig. 2), and finally the push rod 10 is moved in the direction opposite to the arrow a in fig. 2, and finally, the developing unit 41 and the control unit both return to.

Example two:

besides the scheme shown in the first embodiment, the control unit can also adopt the scheme in the first embodiment; therefore, the structural features and the working modes of the embodiment which are the same as those of the embodiment one are not described repeatedly.

As shown in fig. 3, the control unit includes a first gear element 40, a second gear element 50 and a third gear element 60, and gears are disposed on the first gear element 40, the second gear element 50 and the third gear element 60, and the first gear element 40, the second gear element 50 and the third gear element 60 are disposed on the photosensitive unit 31; the first gear element 40 is provided with a swing rod 40a, and the swing rod 40a can control the rotation of the first gear element 40; the gears on the second gear member 50 mesh with the gears on the first gear member 40 and transmit power; the gears on the third gear element 60 mesh with the gears on the second gear element 50 and transmit power; the third gear member 60 is provided with a cam portion 60a, and the cam portion 60a is rotatable together with the third gear member 60.

As shown in fig. 3, when the power applying member 61 is not in abutment with the swing lever 40a, the control unit is in the state shown in fig. 3, the cam portion 60a is not in abutment with the developing unit 41 or a force is not given to the developing unit 41 to move away from the photosensitive unit 31, and at this time, the developing unit 41 is brought close to the photosensitive unit 31 by the elastic member 95, and the developing member 42 is in contact with the photosensitive member 32.

When the power applying element 61 rotates around the rotating shaft 61a and the swing link 40a abuts, the power applying element 61 rotates the swing link 40a from the state shown in fig. 3 to the state shown in fig. 4, and the first gear element 40 is driven by the swing link 40a to rotate along the direction E shown in fig. 4; the first gear element 40 drives the second gear element 50 to rotate along the direction F, and the third gear element 60 is driven by the second gear element 50 to rotate along the direction G; since the cam portion 60a is rotatable together with the third gear member 60, the cam portion 60a rotates to the position shown in fig. 4, and the cam portion 60a gives the developing unit 41 a force away from the photosensitive unit 31, so that the developing unit 41 rotates about the rotary shaft 46b to the state shown in fig. 4, in which the developing unit 41 is away from the photosensitive unit 31, and the developing member 42 is not in contact with (i.e., separated from) the photosensitive member 32. As can be seen from fig. 4, the position of the developing unit 41 abutting against the cam portion 60a is located on the other side of the rotating shaft 46b with respect to the swing lever 40a, and the force received at this position can rotate the developing unit 41 about the rotating shaft 46b in the direction H shown in fig. 4.

When the power applying element 61 rotates from the state shown in fig. 4 to the state shown in fig. 3, the power applying element 61 is no longer abutted to the swing link 40 a; the developing unit 41 approaches the photosensitive unit 31 by the elastic member 95 and presses the cam portion 60a, causing the cam 60a to rotate in the direction opposite to the direction G in fig. 4, and rotates to the state shown in fig. 3; at this time, the third gear element 60 drives the first gear element 40 through the second gear element 50, and returns the swing link 40a to the state shown in fig. 3.

When the power applying element 61 is rotated from the state shown in fig. 4 to the state shown in fig. 3, in order to return the control unit from the state shown in fig. 4 to the state shown in fig. 3, the present embodiment may further include: a torsion spring is disposed on the first gear member 40, the second gear member 50 or the third gear member 60, and the torsion spring can provide an elastic restoring force for the first gear member 40, the second gear member 50 or the third gear member 60, so that the first gear member 40, the second gear member 50 or the third gear member 60 can be restored to the state shown in fig. 3 from the state shown in fig. 4.

Example three:

the structure, connection relationship and operation of the embodiment are the same as those of the embodiment one, and the description is not repeated here.

As shown in fig. 5, the image forming apparatus is provided with a second power applying member a60, a door 12, a support member 13, and a floor portion 11; the power application element 60 is "hook" shaped (e.g., L-shaped); the door cover 12 is connected with the supporting element 13 through a hinge, and the door cover 12 can rotate around a rotating shaft 12a on the image forming device; the process cartridge is supported by a support member 13 after being mounted to the image forming apparatus; the bottom surface portion 11 is disposed below the image forming apparatus, also below the supporting member 13. As shown in fig. 5, the control unit includes a first link 70, a first gear 70a, a second link 80, and a second gear 80 a; the first link 70, the first gear 70a, the second link 80 and the second gear 80a are all disposed on the developing unit 41 on one side of the cartridge in the axial direction of the developing member 42; racks are arranged on the first connecting rod 70 and the second connecting rod 80; the rack on the first link 70 is meshed with the first gear 70 a; the rack on the second connecting rod 80 is meshed with a second gear 80 a; the first gear 70a is meshed with the second gear 80a, and the diameter of the second gear 80a is larger than that of the first gear 70 a; when the process cartridge is mounted to the image forming apparatus, the second link 80 is positioned below the first link 70, and at least a portion of the second link 80 protrudes out of the developing unit 41.

As shown in fig. 5, when the process cartridge is mounted to the image forming apparatus, the process cartridge is supported by the support member 13, and the second link 80 passes through the support member 13 and projects downward, but the first link 80 does not abut against the bottom surface portion 11 and receives the pushing force from the bottom surface portion 11, while the first link 70 does not abut against the second power applying member a60 and receives the power from the second power applying member a60 (a portion that does not overlap in the horizontal direction). At this time, the developing member 42 and the photosensitive member 32 are in a contact state by the elastic member 95.

As shown in fig. 6, when the door 12 is rotated in the direction of the arrow I shown in the drawing, the door 12 carries the supporting member 13 downward (in the vertical direction) in the direction J shown in the drawing and the process cartridge in the direction J as the door 12 is rotated about the rotating shaft 12 a. During the downward movement of the process cartridge and the supporting member 13, the second link 80 abuts against the bottom portion 11, the bottom portion 11 pushes the second link 80 to move in the direction opposite to the direction shown in the drawing J, so as to sequentially drive the second gear 80a and the first gear 70a to rotate, and finally drive the first link 70 to move in the direction opposite to the direction shown in the drawing J, and finally the first link 70 extends out of the developing unit 41, and since the diameter of the second gear 80a is larger than that of the first gear 70a, the distance of movement of the first link 70 in the direction opposite to the direction J is larger than that of movement of the second link 80 in the direction opposite to the direction J, and the first link 70 after extending out of the developing unit 41 can abut against (partially overlap in the horizontal direction) the second power applying member a 60.

As shown in fig. 7, when the second power applying member a60 on the image forming apparatus moves in the direction of fig. K, the first link 70 rotates the developing unit 41 about the rotary shaft 46b in the direction of fig. M by the second power applying member a60, so that the developing member 42 is separated from the photosensitive member 32 (forming the pitch L as shown).

When the second power applying member a60 on the image forming apparatus moves in the reverse direction of the direction K in fig. 7, the second power applying member a60 no longer powers the first link 70, and the developing unit 41 rotates in the reverse direction of the direction M in fig. 7 by the elastic member 95, so that the developing member 42 contacts the photosensitive member 32.

When the door 12 is opened (rotated in the direction opposite to the direction I shown in fig. 6), the door 12 rotates about its rotational shaft 12a and moves the supporting member in the direction opposite to the direction J shown in fig. 6, at which time the second link 80 is out of contact with the bottom surface portion 11, the second link 80 or the first link 70 is under the action of a spring (or the first gear 70a or the second gear 80a is under the action of a torsion spring), the second link 80 is away from the inside of the developing unit 41 in the direction J shown in fig. 6, and the first link 70 is close to the inside of the developing unit 41 in the direction J shown in fig. 6, and finally returns to the state shown in fig. 5, at which the process cartridge can be taken out from the supporting member 13.

Example four:

in this embodiment, the same structure and connection relationship on the process cartridge as those of the embodiment, and the same structure and connection relationship on the image forming apparatus as those of the embodiment will not be described repeatedly.

As shown in fig. 8, the second power applying element a60 is above the developing unit 41 of the process cartridge when the process cartridge is mounted to the image forming apparatus. The control unit includes a first gear member 140, a second gear member 150, and a third gear member 160 provided in the developing unit 41 of the process cartridge; and the first gear element 140, the second gear element 150 and the third gear element 160 are all provided with gears thereon; the first gear element 140 is provided with a swing link 140a, and the swing link 140a can control the rotation of the first gear element 140; the gears on the second gear member 150 mesh with the gears on the first gear member 140 and transmit power; the gears on the third gear element 160 mesh with the gears on the second gear element 150 and transmit power; the third gear member 160 is provided with a cam portion 160a, and the cam portion 160a is rotatable with the third gear member 160.

As shown in fig. 8, when the process cartridge is mounted to the image forming apparatus, the swing lever 140a is partially overlapped with the second power applying member a60 in the horizontal direction; and the developing member 42 is in contact with the photosensitive member 32 at this time. When the second power applying member a60 moves in the direction N shown in fig. 9, the second power applying member a60 abuts against the swing link 140 and causes the swing link 140 to rotate the first gear member 140 about its axis in the direction P shown in fig. 9, the second gear member 150 and the third gear member 160 rotate in sequence, and the cam portion 160a rotates in the direction of arrow P in fig. 9 under the driving of the third gear member 160. At this time, the cam portion 160a does not abut against the photosensitive unit 31, and therefore the developing member 42 remains in contact with the photosensitive member 32.

When the swing link 140a is wound around the hook-shaped portion of the second power applying element a60, the second power applying element a60 does not provide a force to the swing link 140a, the first gear element 140 rotates along the direction Q to the position shown in fig. 10 under the action of an elastic element (e.g., a torsion spring wound around the first gear element, not shown in the drawings), and at this time, the second gear element 150 and the third gear element 160 are also driven by the elastic element to rotate in sequence; at this time, the cam portion 160a does not abut against the photosensitive unit 31, and the developing member 42 is held in contact with the photosensitive member 32.

When the second power applying member a60 moves in the direction of arrow R shown in fig. 11, the second power applying member a60 rotates the swing lever 140a in the direction indicated by the drawing Q, the second gear member 150 and the third gear member 160 rotate respectively, and the third gear member rotates in the direction indicated by the drawing Q, so that the cam portion 160a presses the photosensitive unit 31 and rotates the developing unit 41 about the rotary shaft 46b, while the developing unit 42 is not in contact with (separated from) the photosensitive unit 32. When the second power applying member a60 continues to move in the R direction, the swing lever 140a is disengaged from the second power applying member a60, and the developing unit 41 is restored to the state shown in fig. 8 by the elastic member 95. At this time, the process cartridge is detachable from the image forming apparatus.

In this embodiment, an elastic member may be disposed on the swing link 140a, and when the swing link 140a is disengaged from the second power applying member a60, the swing link 140a may be returned to the state shown in fig. 8 by the elastic member (e.g., a torsion spring wound around the first gear member, not shown).

The rotational axes of the first gear member 140, the second gear member 150 and the third gear member 160 are all parallel to the axial direction of the developing member 42.

Example five:

in this embodiment, the same structures and connection relationships on the process cartridge as those in the first embodiment, and the same structures and connection relationships on the image forming apparatus as those in the fourth embodiment will not be described repeatedly.

As shown in fig. 12, the developing unit 42 on the process cartridge is provided with a push rod 110 and a push rod 120; the push rod 110 is provided with a rotating shaft 110a, the push rod 120 is provided with a rotating shaft 120a, and the push rod 110 is connected with the push rod 120 through a hinge 110 b; the push rod 110 and the push rod 120 are both provided on the developing unit 41; one end of the push rod 120 is connected with the push rod 110, and the other end extends towards the photosensitive unit 31; the push rod 110 extends out of the developing unit 41.

When the second power applying element a60 moves in the S direction shown in fig. 13, the second power applying element a60 abuts against the push rod 110 and rotates the push rod 110 around the rotating shaft 110a in the T direction shown in the figure, the push rod 110 drives the push rod 120 to rotate, and the other end 120b of the push rod 120 moves in a direction away from the photosensitive unit 31.

When the inside of the hook-shaped portion of the second power applying element a60 abuts against the push rod 110 and the second power applying element a60 moves in the X direction shown in fig. 14, the second power applying element a60 drives the push rod 110 to rotate in the Y direction shown in fig. 14, at this time, the push rod 120 is driven to rotate, the other end 120b of the push rod presses against the photosensitive unit 31, so that the developing unit 41 rotates around the rotation shaft 46b, and the developing element 42 is away from the photosensitive element 32.

When the second power applying member a60 is disengaged from the push rod 110, the push rod 110 returns to the state shown in fig. 12 by an elastic member (e.g., a spring or a torsion spring). It is also possible to return to the state shown in fig. 12 by the elastic member 95.

Example six:

in this embodiment, the same structures and connection relationships on the process cartridge as those of the fourth embodiment, and those on the image forming apparatus as those of the fourth embodiment will not be described repeatedly.

As shown in fig. 15, the developing unit 41 of the process cartridge is provided thereon with a first presser bar 240, a second gear member 250, and a third gear member 260; the first pressure lever 240 is provided with a rack part 240a, the rack part 240a is meshed with the second gear element 250, and the second gear element 250 is meshed with the third gear element 260; the third gear member 260 is provided with a cam portion 260 a; the first pressing rod 240 extends out of the developing unit 41 and is provided with a slope.

When the process cartridge is mounted to the image forming apparatus, the inclined surface of the first presser 240 abuts against the second power applying member a60 of the image forming apparatus, the second power applying member a60 moves the first presser 240 in the direction a shown in the drawing (the first presser 240 moves toward the developing unit 41), since the rack portion 240a of the first pressing lever 240 is engaged with the second gear member 250, the second gear member 250 is engaged with the third gear member 260, the movement of the first presser bar 240 in the direction a, is converted into rotation of the third gear member 260 in the direction b shown in the drawing by the second gear member 250 and the third gear member 260, so that the cam portion 260a of the third gear member 260 is engaged with the photosensitive unit 31, thereby rotating the developing unit 41 about the rotary shaft 46b, and the developing unit 41 is thus moved away from the photosensitive unit 31, leaving the developing member 42 out of contact with the photosensitive member 32.

When the inclined surface of the first presser bar 240 on the process cartridge is no longer engaged with the second power applying member a60, the developing unit 42 approaches the photosensitive unit 31 by the elastic force of the elastic member 95, at which time the photosensitive unit 31 abuts the cam portion 260a and the first presser bar 240 is returned to the state shown in fig. 15 (i.e., the first presser bar 240 is moved in a direction to extend out of the developing unit 41) by the third gear member 260, the second gear portion 250 and the rack portion 240 a.

In this embodiment, in order to better enable the first pressing rod 240 to extend out of the developing unit 41, an elastic element may be further disposed on the first pressing rod 240, and the elastic element provides an elastic restoring force for the first pressing rod 240, so that the first pressing rod 240 always receives the elastic restoring force to extend out of the developing unit 41.

Example seven:

in this embodiment, the same structures and connection relationships on the process cartridge as those of the fifth embodiment, and those on the image forming apparatus as those of the fifth embodiment, will not be described repeatedly.

As shown in fig. 16, the developing unit 41 of the process cartridge is provided with a first pressing lever 240, a second pressing lever 210; the first pressing rod 240 is movable on the developing unit 41 along the direction a shown in the figure, and an inclined surface is arranged on the first pressing rod 240; the second lift pin 210 rotates about a rotation shaft 210a provided on the developing unit in the direction of c shown in the drawing.

When the process cartridge is mounted to the image forming apparatus, the inclined surface of the first presser 240 abuts against the second power applying member a60 on the image forming apparatus, and moves the first presser 240 in the direction of a shown in the drawing toward the developing unit 41; the first pressing lever 240 abuts on the second push rod 210, and the second push rod 210 rotates around the rotating shaft 210a in the direction of c in the figure, so that the second push rod 210 abuts on the photosensitive unit 31. The second lift pin 210 rotates the developing unit 41 about the rotary shaft 46b after abutting the photosensitive unit 31, thereby moving the developing unit 41 away from the photosensitive unit 31.

When the first pressing lever 240 is no longer in contact with the second power applying element a60, the developing unit 41 moves toward the photosensitive unit 31 under the action of the elastic element 95, so that the second pressing lever 210 rotates around the rotating shaft 210a in the direction opposite to the direction c shown in the figure, and drives the first pressing lever 240 to move in the direction opposite to the direction a shown in the figure, so that the first pressing lever 240 moves away from the developing unit 41.

Example eight:

as shown in fig. 17 to 27, there is another embodiment of the present invention in which the structures of the process cartridge and the image forming apparatus are different from those of the above-described embodiment.

As shown in fig. 17, an image forming apparatus is described in patent US9836020B2, on which a spacer 71 and a spring 73 are provided; the spacer member 71 rotates about the support shaft 74, and the spring provides the spacer member 71 with an elastic restoring force, so that the spacer member 71 is always kept in the state of being extended upward as shown in fig. 17; the operation of the image forming apparatus is described in patent US9836020B 2. The process cartridge includes a developing unit 41 and a photosensitive unit 31; the photosensitive unit 31 is provided with a photosensitive element 32; the developing unit 41 is provided with a developing member 42 and a projection 44 d; when the protrusion 44d engages with the spacer 71, and the spacer 71 causes the protrusion to rotate the developing unit 41 about the rotation shaft 46b of the developing unit 41, the developing member 42 moves away from the photosensitive member 32; when the spacer 71 is not engaged with the projection 44d, the developing unit 41 is rotated about the rotary shaft 46b by the elastic member 95, and the developing member 42 approaches and contacts the photosensitive member 32.

When the projection 44d is arranged as shown in fig. 17, the projection 44d will give the spacing member 71a force F1, with the two components of the force F1 being F1x and F1y, respectively, wherein F1y tends to move the spacing member 71 downwardly as shown in fig. 17, thereby risking causing the spacing member 71 to disengage from the projection. The structural arrangement of the process cartridge and the protrusion in this embodiment is to solve the risk, and the specific scheme of this embodiment is as follows:

the first scheme of this embodiment:

fig. 18a-21b show a first embodiment of the present invention.

As shown in fig. 18a, 18b, the process cartridge is provided with a projection 44d and a force receiving member 45; the projection 44d is also provided with a blocking element 44b and a sliding groove 44 c; the force-bearing element 45 is provided with a slope 45a, a rotating shaft 45b and a force-bearing surface 45 c.

The rotating shaft 45b of the force-bearing element 45 is connected with the sliding groove 44c, and the rotating shaft 45b can move up and down in the sliding groove 44 c; as shown in the figure, the force receiving member 45 is rotatable about the rotating shaft 45b, and the center of gravity of the force receiving member 45 is away from the rotating shaft 45b and close to the blocking member 44b (with a tendency to rotate clockwise), so that the blocking member 44b can abut against the force receiving surface 45c (preventing the force receiving member 45 from rotating clockwise) and ensure that the force receiving surface 45c is in a vertical state during the process of mounting the process cartridge to the image forming apparatus; the inclined surface 45a on the force receiving member 45 is disposed vertically below it; force-bearing surface 45c may engage spacer element 71 and receive a pushing force from spacer element 71.

After the process cartridge is mounted in the image forming apparatus in the direction indicated by the arrow in fig. 18a, the force receiving member 45 is mounted to the right side of the spacing member 71 with the inclined surface 45a not in contact with the spacing member 71; under the action of the force bearing element 45b, the force bearing surface 45c is in a vertical state.

When the spacing element 71 moves in the direction of the arrow shown in fig. 19a and 19b, the spacing element 71 abuts against the inclined surface 45a and causes the force receiving element 45 to rotate around the rotating shaft 45b, and the rotating shaft 45b slides upwards along the sliding groove 44c, while the blocking element 44b is out of contact with the force receiving surface 45 c; at this time, although the spacer 71 receives the gravity from the force receiving member 45, the force receiving member 45 cannot overcome the elastic force of the spring 73 because the weight of the force receiving member 45 is limited, and thus the spacer 71 does not rotate downward.

When the spacer 71 moves to the position shown in fig. 20a and 20b, the spacer 71 is located at the right side of the force-receiving member 45, and the force-receiving member returns to the position shown in the figure under the action of gravity, the force-receiving surface 45c is located at the vertical position, the rotating shaft 45b is located at the lower end of the sliding groove 44c, and the force-receiving member 45 returns to the initial position.

When the spacer member 71 approaches the force receiving member 45 along the arrow shown in fig. 21a and 21b and engages the force receiving surface 45c, the spacer member 71 gives a pushing force to the force receiving member 45, so that the force receiving member 45 moves leftward; since the height of the rotating shaft 45b in the vertical direction is lower than the height of the uppermost portion of the spacer 71, when the force receiving member 45 receives the urging force from the spacer 71, the force receiving member 45 is not rotated about the rotating shaft 45b in the counterclockwise direction in the figure, so that the rotating shaft 45b on the force receiving member 45 pushes the slide groove 44c to move the protrusion 44d to the left (the rotating shaft 45b rotates relative to the slide groove 44 c), and therefore the developing unit 41 rotates clockwise about the rotating shaft 46b at this time, so that the developing member 42 is moved away from the photosensitive member 32, and the developing member 42 rotates from the state of being in contact with the photosensitive member 32 to the state of not being in contact. Since the force receiving member 45 is rotatable about the rotating shaft 45b, the force receiving surface 45c is always in a vertical state during the process in which the spacer member 71 pushes the force receiving member 45, and the force receiving member 45 does not give a force in the vertical direction to the spacer member 71.

Therefore, the first solution of this embodiment overcomes the drawbacks of the prior art, and not only the structure of the process cartridge is simple, but also the spacer is not pushed to the spacer on the image forming apparatus to move the spacer downward, and the force-bearing surface of the force-bearing element is always kept in a vertical state in the process of receiving the pushing force of the spacer.

Scheme two of this embodiment:

fig. 22a-25b show a second embodiment of the present invention.

As shown in fig. 22a and 22b, the protrusion 144d is provided with a blocking element 144b and a sliding groove 144 c. The force receiving member 145 is provided with a bottom surface 145a, a rotation shaft 145b, and a force receiving surface 145 c. The bottom surface 145a is disposed below the force receiving member 145; the rotating shaft 145b is connected to the sliding groove 144c (in this embodiment, the rotating shaft 145b may be configured to slide in the sliding groove 144c, or may be configured not to slide in the sliding groove 144 c), and the force-receiving element 145 may rotate around the rotating shaft 145 b; the force-receiving surface 145c is provided on one side of the force-receiving member 145. When the process cartridge is in the state shown in the drawing, the force-receiving surface 145c is in a vertical state; the rotation shaft 145 is disposed at the left end of the force receiving member 145, so that the force receiving member 145 tends to rotate clockwise, and the blocking member 144b abuts against the force receiving member 145 to prevent the force receiving member 145 from rotating clockwise.

When the process cartridge is mounted in the image forming apparatus in the direction of the arrow shown in fig. 22a, 22b with the bottom surface 145a not abutting against the spacing member 171, the force receiving surface 145c is not subjected to a force from outside the process cartridge, and therefore the force receiving surface 145 is in a vertical state.

As shown in fig. 23a, the rotating shaft 145b is provided so as not to be slidable in the slide groove 144 c. When the process cartridge continues to move downward in the direction of the arrow shown in the figure to the final state and cannot continue to move downward, the spacer member 171 abuts against the bottom surface 145a, and the force receiving member 145 rotates about the rotating shaft 145b to the state shown in the figure. Since the weight of the force receiving member 145 is small, the force of the force receiving member 145 to the spacing member 171 is smaller than the elastic force of the spring 173, and thus the spacing member 171 is not pushed down.

As shown in fig. 23b, the rotating shaft 145b is configured to slide in the sliding groove 144 c. When the process cartridge continues to move downward in the direction of the arrow shown in the figure to the final state without continuing to move downward, the spacer member 171 abuts against the bottom surface 145a, and the force receiving member 145 moves upward by the spacer member 171 while the force receiving surface 145c remains in the vertical state. Since the weight of the force receiving member 145 is small, the force of the force receiving member 145 to the spacing member 171 is smaller than the elastic force of the spring 173, and thus the spacing member 171 is not pushed down.

As shown in fig. 24a and 24b, when the spacer member 171 moves rightward in the direction of the arrow shown in the figure to the state shown in the figure, the force receiving member 145 returns to the state shown in the figure with the force receiving surface 145c in the vertical state.

As shown in fig. 25a and 25b, when the spacer member 171 moves leftward in the direction of the illustrated arrow, since the height of the uppermost portion of the spacer member 71 in the vertical direction is higher than the height of the rotating shaft 145b in the vertical direction, when the spacer member 171 abuts against the force-receiving surface 145c, the spacer member 171 provides a pushing force to the force-receiving member 145, so that the rotating shaft 145b on the force-receiving member 145 pushes the sliding groove 144c, the rotating shaft 145b rotates relative to the sliding groove 144c, the developing unit 41 rotates clockwise about the rotating shaft 46b at this time, and the developing member 42 moves away from the photosensitive element 32, so that the developing member 42 rotates from a state of contacting with the photosensitive element 32 to a state of not contacting. Since the force receiving member 145 is rotatable about the rotation shaft 145b, the force receiving surface 145c is always maintained in a vertical state during the process in which the spacer member 171 provides the urging force to the force receiving member 145, and the force receiving member 45 does not give a force in the vertical direction to the spacer member 71.

Scheme three of this embodiment:

the same structure as the first and second schemes in this scheme will not be described again.

As shown in fig. 26 and 27, the spacer element 271 is further provided with a bump 271 a; the stress element 245 is also provided with a salient point 245 d; the protrusions 271a on the spacer member extend from the spacer member 271 by a distance substantially equal to the distance the protrusions 245d on the force receiving member 245 extend from the force receiving member 245. When the spacer element 271 abuts the force-bearing surface 245c, the salient points 271a on the spacer element abut the flat surface on the force-bearing surface 245c, and the salient points 245d on the force-bearing element 245 abut the flat surface on the spacer element 271, so that the force-bearing surface 245c is always kept in a vertical state during the process that the spacer element 271 provides thrust for the force-bearing surface 245 c.

Claims

1. A process cartridge includes a developing unit, a photosensitive unit; the developing unit comprises a developing element, the photosensitive unit comprises a photosensitive element, and the developing unit is characterized in that the processing box is further provided with a control element, the control element comprises a protrusion and a stress element, and the stress element is provided with an inclined plane or a bottom surface, a rotating shaft and a stress surface.

2. A process cartridge according to claim 1, wherein: the developing unit may be remote from the photosensitive unit, and the protrusion and the force receiving member are provided on the developing unit.

3. A process cartridge according to claim 2, wherein: the protrusion is also provided with a blocking element.

4. A process cartridge according to claim 2, wherein: the protrusion is also provided with a sliding groove.

5. A process cartridge according to claim 3, wherein: the rotating shaft of the stress element is connected with the sliding groove, and the rotating shaft can move or slide in the sliding groove; the gravity center of the stressed element is far away from the rotating shaft and is close to the blocking element; the blocking element can abut against the force-bearing surface.

6. A process cartridge according to claim 3, wherein: the inclined plane or the bottom surface is arranged below the stressed element; the force bearing surface is arranged on one side of the force bearing element.

7. A cartridge according to claim 1, 2, 3, 4, 5 or 6, wherein: the process cartridge is mounted to an image forming apparatus on which a spacer member is provided.

8. A process cartridge according to claim 7, wherein: the spacing element is also provided with a salient point, and the stress element is also provided with a salient point; when the spacer abuts the force-bearing surface, the protrusions 271a on the spacer abut the flat surface on the force-bearing surface 245c, and the protrusions 245d on the force-bearing member 245 abut the flat surface on the spacer 271.