CN107479345B - Rotational force transmitting assembly, photosensitive drum and process cartridge - Google Patents
Rotational force transmitting assembly, photosensitive drum and process cartridge Download PDFInfo
- Publication number
- CN107479345B CN107479345B CN201710882285.XA CN201710882285A CN107479345B CN 107479345 B CN107479345 B CN 107479345B CN 201710882285 A CN201710882285 A CN 201710882285A CN 107479345 B CN107479345 B CN 107479345B
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- China
- Prior art keywords
- rotational force
- force transmission
- rotary force
- head
- processing box
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- 238000000034 method Methods 0.000 title claims description 36
- 230000005540 biological transmission Effects 0.000 claims abstract description 39
- 230000002093 peripheral effect Effects 0.000 claims abstract description 11
- 238000003780 insertion Methods 0.000 claims description 8
- 230000037431 insertion Effects 0.000 claims description 8
- 230000005484 gravity Effects 0.000 claims description 6
- 238000010276 construction Methods 0.000 abstract description 2
- 238000009434 installation Methods 0.000 abstract 1
- 210000000078 claw Anatomy 0.000 description 3
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G15/00—Apparatus for electrographic processes using a charge pattern
- G03G15/75—Details relating to xerographic drum, band or plate, e.g. replacing, testing
- G03G15/757—Drive mechanisms for photosensitive medium, e.g. gears
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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
- G03G21/186—Axial couplings
-
- 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
- G03G21/1864—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 associated with a positioning function
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G2221/00—Processes not provided for by group G03G2215/00, e.g. cleaning or residual charge elimination
- G03G2221/16—Mechanical means for facilitating the maintenance of the apparatus, e.g. modular arrangements and complete machine concepts
- G03G2221/1651—Mechanical means for facilitating the maintenance of the apparatus, e.g. modular arrangements and complete machine concepts for connecting the different parts
- G03G2221/1657—Mechanical means for facilitating the maintenance of the apparatus, e.g. modular arrangements and complete machine concepts for connecting the different parts transmitting mechanical drive power
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Computer Vision & Pattern Recognition (AREA)
- Electrophotography Configuration And Component (AREA)
- Discharging, Photosensitive Material Shape In Electrophotography (AREA)
Abstract
The invention relates to a rotary force transmission assembly, a photosensitive drum and a processing box which participate in construction. The rotational force transmitting assembly includes a drum gear, a spring, and a rotational force transmitting head. The rotary force transmission head also comprises a radial bulge part which protrudes outwards in the radial direction from the peripheral wall of the guide rod of the rotary force transmission head and is used for positioning the rotary force transmission head relative to the corner of the processing box. The photosensitive drum and the processing box which are constructed by the rotary force transmission assembly have the advantages of smooth installation, simple structure and convenient assembly.
Description
Technical Field
The present invention relates to an important component of an electrophotographic image forming apparatus, and more particularly, to a process cartridge detachably mountable to an electrophotographic image forming apparatus, and a photosensitive drum and a rotational force transmitting assembly for the process cartridge.
Background
Referring to fig. 1, an electrophotographic image forming apparatus 1 such as a laser printer, a multifunction laser integrated machine, or the like uses a process cartridge as an image processing apparatus in which a developing roller supplies developer such as toner in a toner hopper to a photosensitive drum, thereby developing an electrostatic latent image formed on the photosensitive drum to form a visible image on a medium such as paper. The process cartridge is generally loaded into or unloaded from a hopper opening of the electrophotographic image forming apparatus 1 through a chute.
In the process cartridge, there are at least rotating members such as a photosensitive drum, a developing roller, etc., which are rotatably supported in a pair of end walls of the process cartridge in an axis-parallel manner and transmit rotational power through a gear train, the rotational power of the process cartridge comes from the electrophotographic image forming apparatus 1, one end of an earlier rotational force receiving member of the process cartridge is a spherical hinge, and the other end is a meshing portion, hinged to one end of the photosensitive drum.
Referring to fig. 2, when the process cartridge is inserted in place in the Y-axis forward direction toward the cartridge bay of the electrophotographic image forming apparatus 1, the rotational force transmitting head in the rotational force transmitting assembly will be engaged with the driving head 12 in the bay of the electrophotographic image forming apparatus 1 to receive the rotational power, being seated on one of the projections 11 of the opposing bay bottom projection.
Referring to fig. 3, the rotational force transmitting assembly 2 is composed of a rotational force transmitting head 21, an end cap 22, a drum gear 23, and a spring 24, a receiving chamber having an opening at one axial end of the drum gear 23 is formed on the drum gear 23, the end cap 22 is covered on the opening, and a guide hole 231 communicating with the receiving chamber is formed at the other axial end of the drum gear 23. The spring 24 is compressed in the accommodating chamber, and when the process cartridge is mounted to the printer main body, the driving head 12 provided on the main body is coupled with the rotational force transmitting head 21.
Referring to fig. 4, the drive head 12 has two columnar rotational force applying arms extending in a direction perpendicular to the axial direction at the end thereof; the rotational force transmitting head 21 is constituted by a guide bar 211 and a rotational force receiving portion 212 located at one axial end of the guide bar 211; the peripheral wall of the guide rod 211 is provided with an output arm 213 extending outwards along the radial direction; on an outer end wall of the rotational force receiving portion 212 facing away from the guide bar 211 in the axial direction of the guide bar 211, a pair of rotational force receiving teeth 214 formed to protrude outward in the axial direction of the guide bar 211 are provided at positions where the outer end wall is laterally offset from the center of the outer end wall in the guide bar 211. The drum gear 23 is substantially cylindrical, and a pair of input arms 232 extending toward the radial center thereof are provided on the inner wall of the housing chamber parallel to the axial direction of the drum gear 23, and the output arms 213 are in abutting contact with the input arms 232 at the positions of the input arms 232 in the circumferential direction of the drum gear 23. The other axial end of the guide rod 211 sequentially passes through a through hole formed on the end cover 22, and the spring 24 and the accommodating cavity reach a guide hole 231 in clearance fit with the accommodating cavity; the end cap 22 cooperates with the open end of the receiving cavity to define a limit for the rotational force receiving portion 212 away from the drum gear 23. One end of the spring 24 abuts on a side of the output arm 213 remote from the rotational force receiving portion 212, and the other end abuts on a bottom wall of the accommodating chamber.
The Chinese patent application with publication number of CN105807585A discloses a rotating force transmitting assembly, a photosensitive drum and a processing box, which aims to solve the technical problem that the connecting or disconnecting process of the rotating force transmitting assembly and a host machine, namely an electrophotographic imaging device is not smooth. And the photosensitive drum is constructed by the rotational force transmitting assembly, and the process cartridge is constructed by the photosensitive drum. The specific embodiment still has the defects of complex structure, difficult assembly and the like.
Disclosure of Invention
The invention mainly aims to provide a rotating force transmission assembly which improves the smoothness of the falling machine and has a simpler structure;
another object of the present invention is to provide a photosensitive drum constructed by the rotational force transmitting assembly of the present invention;
it is still another object of the present invention to provide a process cartridge constructed of the photosensitive drum of the present invention.
In order to achieve the above main object, the present invention provides a rotational force transmitting assembly including a drum gear, a spring, and a rotational force transmitting head. The rotary force transmission head also comprises a radial bulge part which protrudes outwards in the radial direction from the peripheral wall of the guide rod of the rotary force transmission head and is used for positioning the rotary force transmission head relative to the corner of the processing box.
The above proposal shows that the structure for carrying out corner positioning by adopting the radial protruding part is relatively simple.
A further solution is that the radial projections are eccentric weights.
Another further solution is that the radial projection is a pair of ratchet teeth, which are symmetrically arranged in the circumferential centre. One end of the spring is fixed on the guide rod, and the other end is fixed on the drum gear. After the spring which only provides the axial restoring force in the prior art adopts the fixing mode, the spring can also provide the rotary restoring force, so that the ratchet can be matched with the corresponding pawl to carry out corner positioning on the rotary force transmission head.
In order to achieve another object of the present invention, there is provided a photosensitive drum comprising a drum and a rotational force transmitting assembly mounted at one axial end of the drum, the rotational force transmitting assembly comprising a drum gear, a spring and a rotational force transmitting head. The rotary force transmission head also comprises a radial bulge part which protrudes outwards in the radial direction from the peripheral wall of the guide rod of the rotary force transmission head and is used for positioning the rotary force transmission head relative to the corner of the processing box.
A further solution is that the radial projections are eccentric weights.
Another further solution is that the radial projection is a pair of ratchet teeth, which are symmetrically arranged in the circumferential centre. One end of the spring is fixed on the guide rod, and the other end is fixed on the drum gear.
In order to achieve still another object of the present invention, there is provided a process cartridge including a cartridge body and a photosensitive drum rotatably supported between both end walls of the cartridge body. The photosensitive drum comprises a drum barrel and a rotary force transmission assembly arranged at one axial end of the drum barrel, wherein the rotary force transmission assembly comprises a drum gear, a spring and a rotary force transmission head. The rotary force transmission head also comprises a radial bulge part which protrudes outwards in the radial direction from the peripheral wall of the guide rod of the rotary force transmission head and is used for positioning the rotary force transmission head relative to the corner of the processing box.
The radial protruding part is an eccentric weight body, and when the gravity center of the eccentric weight body is positioned right below the axis of the rotary force transmission head, the corner of the rotary force transmission head is positioned at a position with an included angle between the connecting wire between a pair of rotary force receiving teeth and the insertion direction of the processing box to the host machine.
In another further scheme, the radial protruding part is a pair of ratchets, the ratchets are symmetrically arranged at the circumferential center, one end of the spring is fixed on the guide rod, and the other end of the spring is fixed on the drum gear. The rotary force transmission head is characterized by further comprising a pawl, wherein the pawl is arranged on the box body, and when the pawl is meshed with the ratchet, the corner of the rotary force transmission head is positioned at a position with an included angle between a connecting wire between a pair of rotary force receiving teeth and the insertion direction of the processing box to the host machine.
Still further, the radial projection is a pair of output arms of the rotary force transmitting head, one end of the spring is fixed to the guide bar, and the other end is fixed to the drum gear. The rotary force transmission device also comprises a pawl, wherein the pawl is an elastic piece, one end of the pawl is fixed on the box body, and when the other end of the pawl is used as a stop output arm of the pawl tip, the corner of the rotary force transmission head is positioned at a position with an included angle between a connecting wire between a pair of rotary force receiving teeth and the insertion direction of the processing box to the host machine.
According to the scheme of the processing box, after the radial protruding part or the radial protruding part is matched with the pawl, the connecting line between the pair of rotary force receiving teeth of the rotary force transmission head can be positioned at the position with an included angle between the connecting line and the inserting direction of the processing box to the host machine, so that the clamping of the processing box when the included angle between the connecting line and the processing box is 0 degree or 180 degrees can be effectively avoided, the processing box can be smoothly dropped or taken out, and the processing box has the advantages of being simpler in structure and more convenient to assemble compared with the prior art.
Drawings
FIG. 1 is a schematic perspective view of a process cartridge and an electrophotographic image forming apparatus;
FIG. 2 is an enlarged view of part of A of FIG. 1;
FIG. 3 is a schematic illustration of a rotational force transfer assembly in engagement with a drive head to transfer drive force;
FIG. 4 is an exploded view of the rotational force transfer assembly;
FIG. 5 is a perspective view of a rotational force transfer head and an axial return member of a first embodiment of a rotational force transfer assembly of the present invention;
FIG. 6 is a perspective view of a second embodiment of a rotational force transfer assembly of the present invention in a constructed and unqualified state;
FIG. 7 is a perspective view showing the construction and a state of limitation of a second embodiment of the rotational force transmitting assembly of the present invention;
FIG. 8 is a perspective view of an embodiment of a photosensitive drum of the present invention;
fig. 9 is a perspective view of the process cartridge of the present invention.
The invention is further described below with reference to various embodiments and the accompanying drawings.
Detailed Description
The present invention is mainly directed to improvements of the conventional process cartridge, and in particular, CN105807585A, and the following embodiments only describe the structure and working principle closely related to the present invention, and other structures and components of the rotary force transmitting assembly, the photosensitive drum and the process cartridge that are exactly the same as those of the prior art, and those skilled in the art can fully understand and implement the structures and components according to the technical contents disclosed in the conventional rotary force transmitting assembly, the photosensitive drum and the process cartridge, and in particular, 105807585A, so that no further description is given for these structures and components.
For clarity of illustration of the present invention, the proportions of the figures are not consistent, and the structure of the drive head 12, which is not an embodiment of the present invention, is illustrated in phantom in fig. 3, 4 and 4.
First embodiment of rotational force transmitting Assembly
Referring to fig. 5, fig. 5 is a structural view of the rotary force transmitting head 21 in the first embodiment of the rotary force transmitting assembly, one end 241 of the spring 24 is restrained in the axial direction by the output arm 213, and the other end 242 is restrained in the axial direction by the bottom wall of the accommodating chamber as shown in fig. 3, so that the spring 24 provides only the axial restoring force in this example. Unlike the prior art, an eccentric weight 215 protruding radially is provided on the peripheral wall of the guide rod, and under the action of gravity of the eccentric weight 215, the rotational force transmitting head 21 is positioned to be freely rotated relative to the case body of the process case, and the connecting line between the pair of rotational force receiving teeth 214 is parallel to the gravity direction, i.e. the included angle between the rotational force transmitting head and the insertion direction of the process case assembled in the future to the printer host is 90 degrees.
Second embodiment of rotational force transmitting Assembly
Referring to fig. 6, the radial projections are a pair of ratchet teeth 216 symmetrically arranged at the circumferential center of the rotational force transmitting head 21, unlike the above example, one end 241 of the spring 24 is fixed to the output arm 213, and the other end 242 is fixed to a fixed post 233 in the accommodating chamber of the drum gear 23, so that the spring 24 has the function of not only a compression spring but also a torsion spring.
First embodiment of photosensitive drum
Referring to fig. 8, a first embodiment of the photosensitive drum according to the present invention is formed by assembling the first embodiment of the rotational force transmitting assembly 2 according to the present invention with other parts such as the drum 4 constituting the photosensitive drum according to the prior art.
Second embodiment of photosensitive drum
Referring to fig. 8, a second embodiment of the photosensitive drum according to the present invention is formed when the second embodiment of the rotational force transmitting assembly 2 of the present invention is assembled with other parts such as the drum 4 constituting the photosensitive drum according to the prior art.
First embodiment of Process Cartridge
Referring to fig. 9, the first embodiment of the process cartridge of the present invention is formed when the first embodiment of the photosensitive drum of the present invention is assembled with other parts constituting the process cartridge according to the prior art.
Second embodiment of Process Cartridge
Referring to fig. 9, the second embodiment of the photosensitive drum of the present invention is assembled with other parts constituting the process cartridge according to the prior art to form the second embodiment of the process cartridge of the present invention.
Referring to fig. 6, the pawl 3 is a torsion spring, the coil of the torsion spring is sleeved on the spring seat 131 on the box body 13, the pawl tip 31 is pressed on the peripheral wall of the rotary force transmission head under the action of the restoring force of the torsion spring, and can rotate around the axis of the spring seat 131 by a small angle under the action of external force, the state shown in fig. 6 is a state that the pawl 3 is disengaged from the ratchet teeth 216, and at the moment, the rotary force transmission head 21 rotates relative to the box body 13 in the direction of the hollow arrow shown in fig. 6 under the action of the restoring force of the spring 24.
Referring to fig. 7, when turning to fig. 7 showing the abutment of the pawl tip 31 against the stop surface of the ratchet teeth 216, the line between the pair of rotational force receiving teeth 214 makes an angle of 90 degrees with the insertion direction of the process cartridge into the main body.
Third embodiment of Process Cartridge
Only the differences between the present embodiment and the second embodiment of the process cartridge will be described below, and the details of the differences will not be repeated.
The ratchet 216 is eliminated, the output arm 213 is taken as a radial projection of the present example, an elastic piece is taken as a pawl of the present example, one end of the elastic piece is fixed on the case, the free end is taken as a claw tip, and the claw tip is pressed against the peripheral wall of the rotational force transmitting head 21 by an elastic restoring force similarly to the claw tip in the above example.
Claims (3)
1. A rotational force transfer assembly comprising a drum gear, a spring, and a rotational force transfer head having a pair of rotational force receiving teeth;
the method is characterized in that:
the radial bulge is outwards protruded in the radial direction from the peripheral wall of the guide rod of the rotary force transmission head, the radial bulge is an eccentric weight body, and when the processing box is in place, the gravity center of the eccentric weight body is positioned under the axis of the rotary force transmission head, so that the rotary force transmission head is positioned at a position with an included angle between the connecting line between the pair of rotary force receiving teeth and the insertion direction of the processing box to the host machine relative to the box body of the processing box in a free rotation manner.
2. The photosensitive drum comprises a drum barrel and a rotating force transmission assembly arranged at one axial end of the drum barrel;
the rotational force transfer assembly includes a drum gear, a spring, and a rotational force transfer head having a pair of rotational force receiving teeth;
the method is characterized in that:
the radial bulge is outwards protruded in the radial direction from the peripheral wall of the guide rod of the rotary force transmission head, the radial bulge is an eccentric weight body, and when the processing box is in place, the gravity center of the eccentric weight body is positioned under the axis of the rotary force transmission head, so that the rotary force transmission head is positioned at a position with an included angle between the connecting line between the pair of rotary force receiving teeth and the insertion direction of the processing box to the host machine relative to the box body of the processing box in a free rotation manner.
3. A process cartridge including a cartridge body and a photosensitive drum rotatably supported between both end walls of the cartridge body;
the photosensitive drum comprises a drum barrel and a rotary force transmission assembly arranged at one axial end of the drum barrel;
the rotational force transfer assembly includes a drum gear, a spring, and a rotational force transfer head having a pair of rotational force receiving teeth;
the method is characterized in that:
the radial bulge is outwards protruded in the radial direction from the peripheral wall of the guide rod of the rotary force transmission head, the radial bulge is an eccentric weight body, and when the processing box is in place, the gravity center of the eccentric weight body is positioned right below the axis of the rotary force transmission head, so that the rotary force transmission head is positioned at a position with an included angle between the connecting line between the pair of rotary force receiving teeth and the insertion direction of the processing box to the host machine in a free rotation manner relative to the box body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710882285.XA CN107479345B (en) | 2017-09-26 | 2017-09-26 | Rotational force transmitting assembly, photosensitive drum and process cartridge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710882285.XA CN107479345B (en) | 2017-09-26 | 2017-09-26 | Rotational force transmitting assembly, photosensitive drum and process cartridge |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107479345A CN107479345A (en) | 2017-12-15 |
| CN107479345B true CN107479345B (en) | 2023-11-17 |
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ID=60586868
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710882285.XA Active CN107479345B (en) | 2017-09-26 | 2017-09-26 | Rotational force transmitting assembly, photosensitive drum and process cartridge |
Country Status (1)
| Country | Link |
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| CN (1) | CN107479345B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019174172A1 (en) * | 2018-03-14 | 2019-09-19 | 珠海天威飞马打印耗材有限公司 | Processing cartridge and electrophotographic imaging device |
| CN108459484B (en) * | 2018-05-25 | 2024-03-22 | 珠海天威飞马打印耗材有限公司 | Process cartridge and electrophotographic image forming apparatus |
| CN110275417A (en) * | 2018-03-14 | 2019-09-24 | 珠海天威飞马打印耗材有限公司 | Handle box and image forming |
| CN111812954A (en) * | 2019-08-05 | 2020-10-23 | 卢敬坤 | Rotating force receiving piece |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102073239A (en) * | 2011-01-20 | 2011-05-25 | 珠海天威飞马打印耗材有限公司 | Driving component, photosensitive drum and processing box |
| CN202421744U (en) * | 2012-01-11 | 2012-09-05 | 江西亿铂电子科技有限公司 | Processing box |
| CN104597733A (en) * | 2015-02-16 | 2015-05-06 | 珠海天威飞马打印耗材有限公司 | Rotation force transmission component, photosensitive drum and processing box |
| CN105843008A (en) * | 2016-05-27 | 2016-08-10 | 珠海联合天润打印耗材有限公司 | Driving force receiving assembly of photosensitive drum |
-
2017
- 2017-09-26 CN CN201710882285.XA patent/CN107479345B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102073239A (en) * | 2011-01-20 | 2011-05-25 | 珠海天威飞马打印耗材有限公司 | Driving component, photosensitive drum and processing box |
| CN202421744U (en) * | 2012-01-11 | 2012-09-05 | 江西亿铂电子科技有限公司 | Processing box |
| CN104597733A (en) * | 2015-02-16 | 2015-05-06 | 珠海天威飞马打印耗材有限公司 | Rotation force transmission component, photosensitive drum and processing box |
| CN105843008A (en) * | 2016-05-27 | 2016-08-10 | 珠海联合天润打印耗材有限公司 | Driving force receiving assembly of photosensitive drum |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107479345A (en) | 2017-12-15 |
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