CN108227448B - Process cartridge, mounting method and dismounting method thereof, and electrophotographic image forming apparatus - Google Patents
Process cartridge, mounting method and dismounting method thereof, and electrophotographic image forming apparatus Download PDFInfo
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- CN108227448B CN108227448B CN201810078711.9A CN201810078711A CN108227448B CN 108227448 B CN108227448 B CN 108227448B CN 201810078711 A CN201810078711 A CN 201810078711A CN 108227448 B CN108227448 B CN 108227448B
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G21/00—Arrangements not provided for by groups G03G13/00 - G03G19/00, e.g. cleaning, elimination of residual charge
- G03G21/16—Mechanical means for facilitating the maintenance of the apparatus, e.g. modular arrangements
- G03G21/18—Mechanical means for facilitating the maintenance of the apparatus, e.g. modular arrangements using a processing cartridge, whereby the process cartridge comprises at least two image processing means in a single unit
- G03G21/1839—Means for handling the process cartridge in the apparatus body
- G03G21/1857—Means for handling the process cartridge in the apparatus body for transmitting mechanical drive power to the process cartridge, drive mechanisms, gears, couplings, braking mechanisms
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- Computer Vision & Pattern Recognition (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Electrophotography Configuration And Component (AREA)
Abstract
The invention provides a process cartridge, an electrophotographic image forming apparatus, a loading and unloading method of the process cartridge, wherein the process cartridge includes a cartridge body, a photosensitive drum driving head, a developing roller driving head and a pushing mechanism; the developing roller driving head comprises a connecting part, a driving force receiving head and an axial resetting piece, wherein the driving force receiving head and the axial resetting piece are both positioned in the connecting part, the driving force receiving head can reciprocate along the axial direction of the connecting part, the axial resetting piece is an elastic piece, one end of the elastic piece is connected to the driving force receiving head, and the other end of the elastic piece is connected to the inner wall of the connecting part; the pushing mechanism is hinged on the box body through a hinge shaft and comprises a compression part and a pushing part, the compression part and the pushing part are respectively positioned at two sides of the hinge shaft, the compression part is sleeved on the photosensitive drum driving head and positioned at the outer part of the box body, and the pushing part is connected with the driving force receiving head and pushes the driving force receiving head to move towards one side far away from the box body. The processing box can avoid the abrasion problem of the developing roller driving head in the installation process and improve the printing quality.
Description
Technical Field
The present invention relates to the field of electrophotographic image forming printing technology, and more particularly, to a process cartridge detachably mountable to an electrophotographic image forming apparatus, a mounting method and a dismounting method of the process cartridge, and an electrophotographic image forming apparatus having the process cartridge.
Background
An electrophotographic image forming apparatus is an apparatus for forming an image on a printing medium such as paper using the electrophotographic principle, and includes a copying machine, a printer, a facsimile machine, an all-in-one machine, and the like, and generally includes a main body and a process cartridge detachably mounted in the main body. The processing box is provided with a rotating element and a rotating force transmission component for receiving the rotating driving force provided by a host machine such as a printer, the rotating element at least comprises one of a developing element, a photosensitive drum and a charging element, and after the processing box is mounted on the host machine, the rotating force transmission component is matched with a driving mechanism of the host machine and receives the rotating force provided by the driving mechanism, so that the rotating element is driven to rotate.
One of the conventional process cartridges has two driving force receiving members, one being a photosensitive drum driving head provided at an axial end of a photosensitive drum and the other being a developing roller driving head provided at an axial end of a developing roller. The developing roller driving head mainly comprises a plurality of components, and the deviation between the axis of the driving head and the axis of the developing roller is realized through an Oldham coupling structure. When the cover of the printer is closed, the cover of the printer lifts the process cartridge at the non-driving end of the process cartridge, so that the two driving force receiving parts of the process cartridge are respectively matched with the two driving heads of the printer.
Thus, after each process cartridge is loaded, the developing roller driving head is already engaged with the transmission head of the printer, and the process cartridge moves upwards in a direction perpendicular to the developing roller driving head, so that the engaged portion of the developing driving head and the transmission head is worn. Since the area of the engagement portion on the developing roller drive head is relatively small, even if the oldham coupling structure is provided to reduce the wear of the engagement portion, the wear of the whole is hardly avoided.
Disclosure of Invention
The invention mainly aims to provide a processing box which can avoid the abrasion problem of a driving head of a developing roller in the installation process and improve the printing quality.
Another object of the present invention is to provide an electrophotographic image forming apparatus having the above process cartridge.
It is still another object of the present invention to provide a mounting method of the above-described process cartridge.
It is still another object of the present invention to provide a method of disassembling the above-described process cartridge.
In order to achieve the above-mentioned main object, the present invention provides a process cartridge comprising a cartridge body, and a photosensitive drum and a developing roller rotatably supported between both end walls of the cartridge body about a rotation axis, one axial end of the photosensitive drum being provided with a photosensitive drum driving head, one axial end of the developing roller being provided with a developing roller driving head, the photosensitive drum driving head and the developing roller driving head being located on the same side of the cartridge body; the developing roller driving head comprises a connecting part, a driving force receiving head and an axial resetting piece, wherein a containing cavity is formed in the connecting part, the driving force receiving head and the axial resetting piece are both positioned in the containing cavity, one axial end of the driving force receiving head extends out of the containing cavity, the driving force receiving head can reciprocate along the axial direction of the connecting part, the axial resetting piece is an elastic piece, the first end of the elastic piece is connected to the driving force receiving head, and the second end of the elastic piece is connected to the bottom wall of the containing cavity; the processing box further comprises a forced pushing mechanism which is hinged on the box body through a hinge shaft, the forced pushing mechanism comprises a pressed part and a pushing part, the pressed part and the pushing part are respectively positioned on two sides of the hinge shaft, the pressed part is sleeved on the photosensitive drum driving head and positioned outside the box body, and the pushing part is connected with the driving force receiving head and pushes the driving force receiving head to move towards one side far away from the box body.
As can be seen from the above-described aspects, the process cartridge is mounted in the electrophotographic image forming apparatus and before the door is closed, the driving force receiving head is not in contact with the second transmission head, and after the door is closed, the first transmission head of the electrophotographic image forming apparatus is extended and applies pressure to the pressed portion of the urging mechanism, which urges the urging mechanism to rotate about the hinge shaft, and the urging portion urges the driving force receiving head outwardly, so that the driving force receiving head is extended and engaged with the second transmission head of the electrophotographic image forming apparatus.
In one preferred embodiment, the developing roller driving head further includes a limiting mechanism limiting displacement of the driving force receiving head in the axial direction of the coupling member, the limiting mechanism includes a transmission shaft, two movable grooves disposed symmetrically with respect to the central axis of the coupling member are provided on the peripheral wall of the coupling member, each of the movable grooves extends in a direction parallel to the central axis of the coupling member, the transmission shaft is mounted on the driving force receiving head, a first end of the tension spring is mounted on the transmission shaft, and the transmission shaft extends from a side wall of the driving force receiving head in the radial direction of the driving force receiving head at least into the movable groove.
It can be seen that the provision of the limiting mechanism limits the displacement of the driving force receiving head in the axial direction of the coupling member while preventing the driving force receiving head from coming off the coupling member, and in addition, the transmission shaft can achieve torque transmission.
In one preferred embodiment, the outer peripheral wall of the driving force receiving head is provided with a limiting portion, the limiting portion is a protrusion extending outwards from the outer peripheral wall of the driving force receiving head in the radial direction of the driving force receiving head, the pushing portion is sleeved outside the driving force receiving head and limited between the limiting portion and the connecting member, and the pushing portion abuts against the limiting portion.
Therefore, the pushing part between the limiting part and the connecting part can push the driving force receiving head to the side far away from the box body, so that the second transmission head is engaged.
In a preferred embodiment, the elastic element is a tension spring.
Therefore, the tension spring is simple in structure and can realize the reset function of the driving force receiving head more easily.
The pushing mechanism further comprises a first connecting portion and a second connecting portion, the first connecting portion and the second connecting portion are arranged at an obtuse angle, the first connecting portion is connected with the compression portion, the second connecting portion is connected with the pushing portion, a hinge shaft mounting hole extending in the vertical direction is formed in the connecting portion of the first connecting portion and the second connecting portion, and the hinge shaft penetrates through the hinge shaft mounting hole to mount the pushing mechanism on the box body.
Therefore, the first connecting part and the second connecting part which are arranged at an obtuse angle with each other connect the pressure receiving part and the pushing part into a whole, so that the pushing mechanism is similar to a teeterboard structure, applies an acting force to the pressure receiving part, and when the pressure receiving part moves, the pushing part moves towards the direction opposite to the moving direction of the pressure receiving part, and the pushing part pushes the driving force receiving head to move, so that the driving force receiving head stretches out and is engaged with the second transmission head.
In a preferred embodiment, the pressing portion has a ring shape, an inner diameter of the pressing portion is larger than a diameter of the photosensitive drum driving head, the pressing portion is disposed parallel to a radial direction of the photosensitive drum, the pushing portion has a ring shape with an opening, and the pushing portion is disposed parallel to the radial direction of the developing roller.
To achieve the above-described other object, the present invention provides an electrophotographic image forming apparatus including a rotatable first transmission head, a rotatable second transmission head, a process cartridge detachably mounted in the electrophotographic image forming apparatus, and a door cover drivingly connected to the first transmission head, the door cover driving the first transmission head to move between an extended position and a retracted position; the process cartridge includes a cartridge body, a photosensitive drum rotatably supported about a rotation axis between both end walls of the cartridge body, and a developing roller, one axial end of the photosensitive drum being provided with a photosensitive drum driving head which is engaged with the first transmission head and transmits a first rotational driving force to the photosensitive drum; one axial end of the developing roller is provided with a developing roller driving head which is engaged with the second transmission head and receives the second rotary driving force, and the photosensitive drum driving head and the developing roller driving head are positioned on the same side of the box body; the developing roller driving head comprises a connecting part, a driving force receiving head and an axial resetting piece, wherein a containing cavity is formed in the connecting part, the driving force receiving head and the axial resetting piece are both positioned in the containing cavity, one axial end of the driving force receiving head extends out of the containing cavity, the driving force receiving head can reciprocate along the axial direction of the connecting part, the axial resetting piece is an elastic piece, the first end of the elastic piece is connected to the driving force receiving head, and the second end of the elastic piece is connected to the bottom wall of the containing cavity; the processing box further comprises a forced pushing mechanism which is hinged on the box body through a hinge shaft, the forced pushing mechanism comprises a pressed part and a pushing part, the pressed part and the pushing part are respectively located on two sides of the hinge shaft, the pressed part is sleeved on the photosensitive drum driving head and located outside the box body, the end part of the first transmission head is abutted with the pressed part, and the pushing part is connected with the driving force receiving head and pushes the driving force receiving head to move towards one side far away from the box body.
The pushing mechanism further comprises a first connecting portion and a second connecting portion, the first connecting portion and the second connecting portion are arranged at an obtuse angle, the first connecting portion is connected with the compression portion, the second connecting portion is connected with the pushing portion, a hinge shaft mounting hole extending in the vertical direction is formed in the connecting portion of the first connecting portion and the second connecting portion, and the hinge shaft penetrates through the hinge shaft mounting hole to mount the pushing mechanism on the box body.
In order to achieve the above-mentioned still another object, the present invention provides a method of loading a process cartridge, an electrophotographic image forming apparatus including a rotatable first power transmitting head, a rotatable second power transmitting head, a process cartridge detachably mounted in the electrophotographic image forming apparatus, and a door cover drivingly connected to the first power transmitting head, the door cover driving the first power transmitting head to move between an extended position and a retracted position; the processing box is the processing box; the loading method of the process cartridge includes the steps of:
opening the door cover;
loading the process cartridge into an electrophotographic image forming apparatus;
closing the door cover;
the first transmission head extends out and is jointed with the photosensitive drum driving head, the first transmission head is abutted against the pressure receiving part, the pushing mechanism rotates around the hinge shaft, the pressure receiving part moves towards the side close to the box body, and the pushing part pushes the driving force receiving head towards the side far away from the box body until the driving force receiving head is jointed with the second transmission head.
In order to achieve the above-described still further object, the present invention provides a process cartridge removing method, an electrophotographic image forming apparatus including a rotatable first power transmitting head, a rotatable second power transmitting head, a process cartridge detachably mounted in the electrophotographic image forming apparatus, and a door cover drivingly connected to the first power transmitting head, the door cover driving the first power transmitting head to move between an extended position and a retracted position; the processing box is the processing box; the process cartridge removing method includes the steps of:
opening the door cover, and retracting the first transmission head and separating the first transmission head from the photosensitive drum driving head;
the elastic piece pulls the driving force receiving head towards one side close to the box body under the action of elastic restoring force, the pushing mechanism is forced to rotate around the hinge shaft, the pressed part moves towards one side far away from the box body, the pushing part moves towards one side close to the box body, and the second transmission head is separated from the driving force receiving head.
Drawings
Fig. 1 is a sectional view of an electrophotographic image forming apparatus in an embodiment of a process cartridge of the present invention.
Fig. 2 is a schematic structural view of an embodiment of the process cartridge of the present invention.
Fig. 3 is a schematic view of the structure of a first and a second drive head of an electrophotographic image forming apparatus in an embodiment of the process cartridge of the present invention.
Fig. 4 is an exploded view of the structure of the process cartridge of the present invention after hiding some parts.
Fig. 5 is a schematic view of a structure in which the driving force receiving head is in a retracted state in the process cartridge of the embodiment of the present invention.
Fig. 6 is a schematic view showing a structure in which the driving force receiving head is in an extended state in the process cartridge of the embodiment of the present invention.
Fig. 7 is an exploded view of the structure of the photosensitive drum driving head, the developing roller driving head, and the urging mechanism in the process cartridge embodiment of the present invention.
Fig. 8 is a schematic structural view of a pushing mechanism in the embodiment of the process cartridge of the present invention.
The invention is further described below with reference to the drawings and examples.
Detailed Description
Referring to fig. 1 to 3, fig. 1 shows a state in which the process cartridge of the present embodiment is mounted in an electrophotographic image forming apparatus, which is a printer 9, the printer 9 including a rotatable first transmission head 11, a rotatable second transmission head 12, a process cartridge 10 detachably mounted in the printer 9, and a door 13 drivingly connected to the first transmission head 11.
The process cartridge 10 includes a cartridge body 2, a photosensitive drum 21 and a developing roller 22 rotatably supported between both end walls of the cartridge body 2 about its own rotation axis, one axial end of the photosensitive drum 21 being provided with a photosensitive drum drive head 3. One axial end of the developing roller 22 is provided with a developing roller drive head 4, and the photosensitive drum drive head 3 and the developing roller drive head 4 are located on the same side of the cartridge body 2.
The door of the printer 9 is located at the non-drive end of the process cartridge 10, and the door 13 drives the first transmission head 11 between the extended position and the retracted position. That is, when the door cover 13 is in an open state, the first transmission head 11 is in a retracted position, and the process cartridge 10 is obliquely arranged from the driving end to the non-driving end from top to bottom; when the door cover 13 is in the closed state, the first transmission head 11 is in the extended position so as to be engaged with the process cartridge 10, the door cover 13 lifts up the non-drive end of the process cartridge 10 to the bottom surface of the process cartridge 10 to be in the horizontal position, at this time, the first transmission head is coaxially disposed with the photosensitive drum drive head, and the second transmission head is coaxially disposed with the developing roller drive head so that the photosensitive drum drive head 3 is better engaged with the first transmission head 11 and transmits the first rotational drive force to the photosensitive drum 21, while better engaging the developing roller drive head 4 with the second transmission head 12 and receiving the second rotational drive force, thereby transmitting the second rotational drive force from the printer 9 to the developing roller 22. The drive end of the process cartridge 10 means one end of the process cartridge 10 having the photosensitive drum drive head 3 and the developing roller drive head 4, and the non-drive end of the process cartridge 10 means one end of the process cartridge 10 disposed opposite to the drive end.
Referring to fig. 4 to 7, the developing roller driving head 4 includes a coupling member 41, a driving force receiving head 42, an axial restoring member and a limiting mechanism, a receiving chamber 411 is opened in the coupling member 41, both the driving force receiving head 42 and the axial restoring member are located in the receiving chamber 411, an axial end of the driving force receiving head 42 protrudes from the receiving chamber 411, and the driving force receiving head 42 is reciprocally movable in an axial direction of the coupling member 41. The limiting mechanism limits the displacement of the driving force receiving head 42 in the axial direction of the coupling member 41, and includes a transmission shaft 44, two movable slots 411 are provided on the peripheral wall of the coupling member 41, which are symmetrically disposed with respect to the central axis of the coupling member 41, each movable slot 411 extending in a direction parallel to the central axis of the coupling member 41, the transmission shaft 44 is mounted on the driving force receiving head 42, and the transmission shaft 44 extends from the side wall of the driving force receiving head 42 at least into the movable slot 411 in the radial direction of the driving force receiving head 42.
The axial return member is an elastic member, optionally made of an elastic material, preferably a tension spring 43. The first end of the tension spring 43 is mounted on the transmission shaft 44, the tension spring 43 is connected to the driving force receiving head 42 through the transmission shaft 44, and the second end of the tension spring 43 is connected to the bottom wall of the accommodating chamber 411.
The processing box further comprises a pushing mechanism 5, the pushing mechanism 5 is hinged to the box body 2 through a hinge shaft 53, the pushing mechanism 5 comprises a pressed part 51, a pushing part 52, a first connecting part 55 and a second connecting part 56 which are integrally formed, the pressed part 51 and the pushing part 52 are respectively located on two sides of the hinge shaft 53, the pressed part 51 is sleeved on the photosensitive drum driving head 3 and located outside the box body 2, and the pushing part 52 is connected with the driving force receiving head 42. The first transmission head 11 is provided with a cylindrical extension 111 on the end wall of the axial end engaging with the photosensitive drum driving head 3, and when the first transmission head 11 is extended and engaged with the photosensitive drum driving head 3, the extension 111 abuts against the pressing portion 51 and presses the pressing portion 51 toward the cartridge 2 side (as shown in a direction in fig. 6), while the pushing portion 52 pushes the driving force receiving head 42 to move toward the cartridge 2 side.
Referring to fig. 2, 7 and 8, the pressure receiving portion 51 has a ring shape, the inner diameter of the pressure receiving portion 51 is larger than the diameter of the photosensitive drum driving head 3, the pressure receiving portion 51 is disposed parallel to the radial direction of the photosensitive drum 21, the pushing portion 52 has a ring shape with an opening, and the pushing portion 52 is disposed parallel to the radial direction of the developing roller 22. The first connecting portion 55 and the second connecting portion 56 are arranged at an obtuse angle with each other, the first connecting portion 55 is connected with the pressed portion 51, the second connecting portion 56 is connected with the pushing portion 52, a hinge shaft mounting hole 57 extending in the vertical direction is formed in the joint of the first connecting portion 55 and the second connecting portion 56, two ends of the hinge shaft 53 are rotatably supported on the box body 2, and the hinge shaft 53 penetrates through the hinge shaft mounting hole 57 to mount the forced pushing mechanism 5 on the box body 2.
The outer peripheral wall of the driving force receiving head 42 is provided with a limiting portion 421, the limiting portion 421 is a protrusion extending outward from the outer peripheral wall of the driving force receiving head 42 in the radial direction of the driving force receiving head 42, the pushing portion 52 is sleeved outside the driving force receiving head 42 and is limited between the limiting portion 421 and the coupling member 41, and the pushing portion 52 abuts against the limiting portion 421.
The mounting method and the dismounting method of the process cartridge 10 of the present invention are described below with reference to fig. 1, 2, 5 and 6.
The loading method of the process cartridge includes the steps of:
first, the door 13 is opened, and the process cartridge 10 is loaded into the printer 9, at which time the process cartridge 10 is set obliquely from the drive end to the non-drive end from top to bottom.
Then, the door cover 13 is closed. At this time, the first transmission head 11 is extended and engaged with the photosensitive drum driving head 3, the first transmission head 11 abuts against the pressing portion 51, the urging mechanism 5 is rotated about the hinge shaft 53, the pressing portion 51 is moved toward the side close to the cartridge body 2, the pushing portion 52 pushes the driving force receiving head 42 toward the side away from the cartridge body 2 to the driving force receiving head 42 to engage with the second transmission head 12, and at the same time, the door 13 lifts up the non-driving end of the process cartridge 10 to the photosensitive drum driving head 3 coaxially with the first transmission head 11, and the developing roller driving head 4 coaxially with the second transmission head 12.
The process cartridge removing method includes the steps of:
first, the door 13 is opened, and the first transmission head 11 is retracted and separated from the photosensitive drum driving head 3.
The tension spring 43 pulls the driving force receiving head 42 toward the side close to the case 2 by the elastic restoring force, the urging mechanism 5 rotates about the hinge shaft 53, the pressed portion 51 moves toward the side away from the case 2, the pushing portion 52 moves toward the side close to the case 2, and the second transmission head 12 is separated from the driving force receiving head 42.
As can be seen from the above-described aspects, the process cartridge is mounted in the electrophotographic image forming apparatus and before the door is closed, the driving force receiving head is not in contact with the second transmission head, and after the door is closed, the first transmission head of the electrophotographic image forming apparatus is extended and applies pressure to the pressed portion of the urging mechanism, which urges the urging mechanism to rotate about the hinge shaft, and the urging portion urges the driving force receiving head outwardly, so that the driving force receiving head is extended and engaged with the second transmission head of the electrophotographic image forming apparatus.
Finally, it should be emphasized that the foregoing description is merely illustrative of the preferred embodiments of the invention, and that various changes and modifications can be made by those skilled in the art without departing from the spirit and principles of the invention, and any such modifications, equivalents, improvements, etc. are intended to be included within the scope of the invention.
Claims (10)
1. The processing box comprises a box body, a photosensitive drum and a developing roller, wherein the photosensitive drum and the developing roller are rotatably supported between two end walls of the box body around a rotation axis, one axial end of the photosensitive drum is provided with a photosensitive drum driving head, one axial end of the developing roller is provided with a developing roller driving head, and the photosensitive drum driving head and the developing roller driving head are positioned on the same side of the box body;
the method is characterized in that:
the developing roller driving head comprises a connecting part, a driving force receiving head and an axial resetting piece, wherein a containing cavity is formed in the connecting part, the driving force receiving head and the axial resetting piece are both positioned in the containing cavity, one axial end of the driving force receiving head extends out of the containing cavity, the driving force receiving head can reciprocate along the axial direction of the connecting part, the axial resetting piece is an elastic piece, a first end of the elastic piece is connected to the driving force receiving head, and a second end of the elastic piece is connected to the bottom wall of the containing cavity;
the processing box further comprises a forced pushing mechanism, the forced pushing mechanism is hinged to the box body through a hinge shaft, the forced pushing mechanism comprises a pressed portion and a pushing portion, the pressed portion and the pushing portion are respectively located on two sides of the hinge shaft, the pressed portion is sleeved on the photosensitive drum driving head and located outside the box body, and the pushing portion is connected with the driving force receiving head and pushes the driving force receiving head to move away from one side of the box body.
2. A process cartridge according to claim 1, wherein:
the developing roller driving head further comprises a limiting mechanism, the limiting mechanism limits the driving force receiving head to move in the axial direction of the connecting component, the limiting mechanism comprises a transmission shaft, two movable grooves which are symmetrically arranged relative to the central axis of the connecting component are formed in the peripheral wall of the connecting component, each movable groove extends along the direction parallel to the central axis of the connecting component, the transmission shaft is mounted on the driving force receiving head, the first end of the elastic piece is mounted on the transmission shaft, and the transmission shaft extends from the side wall of the driving force receiving head to at least the movable groove in the radial direction of the driving force receiving head.
3. A process cartridge according to claim 1, wherein:
the driving force receiving head is characterized in that a limiting part is arranged on the outer peripheral wall of the driving force receiving head, the limiting part is a protrusion extending outwards from the outer peripheral wall of the driving force receiving head in the radial direction of the driving force receiving head, the pushing part is sleeved outside the driving force receiving head and limited between the limiting part and the connecting part, and the pushing part is abutted to the limiting part.
4. A process cartridge according to any one of claims 1 to 3, wherein:
the elastic piece is a tension spring.
5. A process cartridge according to any one of claims 1 to 3, wherein:
the pushing mechanism further comprises a first connecting portion and a second connecting portion, the first connecting portion and the second connecting portion are arranged at an obtuse angle with each other, the first connecting portion is connected with the pressed portion, the second connecting portion is connected with the pushing portion, a hinge shaft mounting hole extending in the vertical direction is formed in the joint of the first connecting portion and the second connecting portion, and the hinge shaft penetrates through the hinge shaft mounting hole to enable the pushing mechanism to be mounted on the box body.
6. A process cartridge according to any one of claims 1 to 3, wherein:
the shape of the pressure receiving part is annular, the inner diameter of the pressure receiving part is larger than the diameter of the photosensitive drum driving head, the pressure receiving part is parallel to the radial direction of the photosensitive drum, the pushing part is annular with an opening, and the pushing part is parallel to the radial direction of the developing roller.
7. An electrophotographic image forming apparatus including a rotatable first transmission head, a rotatable second transmission head, a process cartridge detachably mounted in the electrophotographic image forming apparatus, and a door cover drivingly connected to the first transmission head, the door cover driving the first transmission head to move between an extended position and a retracted position;
the process cartridge includes a cartridge body, a photosensitive drum rotatably supported about a rotation axis between both end walls of the cartridge body, and a developing roller, one axial end of the photosensitive drum being provided with a photosensitive drum driving head that engages with the first transmission head and transmits a first rotational driving force to the photosensitive drum; one axial end of the developing roller is provided with a developing roller driving head which is engaged with the second transmission head and receives a second rotary driving force, and the photosensitive drum driving head and the developing roller driving head are positioned on the same side of the box body;
the method is characterized in that:
the developing roller driving head comprises a connecting part, a driving force receiving head and an axial resetting piece, wherein a containing cavity is formed in the connecting part, the driving force receiving head and the axial resetting piece are both positioned in the containing cavity, one axial end of the driving force receiving head extends out of the containing cavity, the driving force receiving head can reciprocate along the axial direction of the connecting part, the axial resetting piece is an elastic piece, a first end of the elastic piece is connected to the driving force receiving head, and a second end of the elastic piece is connected to the bottom wall of the containing cavity;
the processing box further comprises a forced pushing mechanism, the forced pushing mechanism is hinged to the box body through a hinge shaft, the forced pushing mechanism comprises a pressed part and a pushing part, the pressed part and the pushing part are respectively located on two sides of the hinge shaft, the pressed part is sleeved on the photosensitive drum driving head and located outside the box body, the end part of the first transmission head is abutted to the pressed part, and the pushing part is connected with the driving force receiving head and pushes the driving force receiving head to move away from one side of the box body.
8. An electrophotographic image forming apparatus according to claim 7, wherein:
the pushing mechanism further comprises a first connecting portion and a second connecting portion, the first connecting portion and the second connecting portion are arranged at an obtuse angle with each other, the first connecting portion is connected with the pressed portion, the second connecting portion is connected with the pushing portion, a hinge shaft mounting hole extending in the vertical direction is formed in the joint of the first connecting portion and the second connecting portion, and the hinge shaft penetrates through the hinge shaft mounting hole to enable the pushing mechanism to be mounted on the box body.
9. A method of loading a process cartridge, an electrophotographic image forming apparatus including a rotatable first transfer head, a rotatable second transfer head, a process cartridge detachably mounted in the electrophotographic image forming apparatus, and a door cover drivingly connected to the first transfer head, the door cover driving the first transfer head to move between an extended position and a retracted position; the process cartridge is the process cartridge according to any one of claims 1 to 6; the loading method of the process cartridge includes the steps of:
opening the door cover;
loading the process cartridge into the electrophotographic image forming apparatus;
closing the door cover;
the first transmission head extends out and is engaged with the photosensitive drum driving head, the first transmission head abuts against the pressed part, the forced pushing mechanism rotates around the hinge shaft, the pressed part moves towards one side close to the box body, and the pushing part pushes the driving force receiving head towards one side far away from the box body until the driving force receiving head is engaged with the second transmission head.
10. A method of removing a process cartridge, an electrophotographic image forming apparatus including a rotatable first transfer head, a rotatable second transfer head, a process cartridge detachably mounted in the electrophotographic image forming apparatus, and a door cover drivingly connected to the first transfer head, the door cover driving the first transfer head to move between an extended position and a retracted position; the process cartridge is the process cartridge according to any one of claims 1 to 6; the method for disassembling the process cartridge includes the steps of:
opening the door cover, and retracting the first transmission head and separating the first transmission head from the photosensitive drum driving head;
the elastic piece pulls the driving force receiving head towards one side close to the box body under the action of elastic restoring force, the forced pushing mechanism rotates around the hinge shaft, the pressed part moves towards one side far away from the box body, the pushing part moves towards one side close to the box body, and the second transmission head is separated from the driving force receiving head.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810078711.9A CN108227448B (en) | 2018-01-26 | 2018-01-26 | Process cartridge, mounting method and dismounting method thereof, and electrophotographic image forming apparatus |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810078711.9A CN108227448B (en) | 2018-01-26 | 2018-01-26 | Process cartridge, mounting method and dismounting method thereof, and electrophotographic image forming apparatus |
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| Publication Number | Publication Date |
|---|---|
| CN108227448A CN108227448A (en) | 2018-06-29 |
| CN108227448B true CN108227448B (en) | 2023-08-25 |
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| CN110441999B (en) * | 2019-08-16 | 2024-02-09 | 珠海天威飞马打印耗材有限公司 | Process cartridge, process cartridge mounting method, and electrophotographic image forming apparatus |
| WO2022100705A1 (en) * | 2020-11-12 | 2022-05-19 | 纳思达股份有限公司 | Processing cartridge |
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