WO2011091639A1 - Driving assembly, photosensitive drum, and cassette - Google Patents

Abstract

A driving assembly, a photosensitive drum including the driving assembly and a cassette including the same are provided. The driving assembly includes a gear, an axial regulating assembly, an elastic supporting portion and an axial positive portion. The axial regulating assembly includes a first moving subassembly, a middle guiding blade and a center shaft portion. The middle guiding blade is nipped between the first moving subassembly and the center shaft portion. A guiding gap is disposed in the middle guiding blade, and the first moving subassembly is matched with the middle guiding blade in a relative movable form in the first radial direction. The center shaft portion and the gear have same axes. The center shaft portion is matched with the gear in a relative movable form in the axial direction of the gear, and is matched with the middle guiding blade relative shiftily in the second radial direction.

Description

 Drive unit, drum and process cartridge Technical field

The present invention relates to a drive assembly, a photosensitive drum constructed using such a drive assembly, and a process cartridge. The present invention is based on a Chinese utility model patent application filed on Jan. 27, 2010, the application number of which is incorporated herein by reference.

Background technique

Electrophotographic image forming apparatuses include copying machines, laser printers, and the like.

There is usually a process cartridge inside the electrophotographic image forming apparatus, and the process cartridge can be mounted to and detached from the main assembly of the electrophotographic image forming apparatus. For example, a process cartridge prepared by integrally assembling at least one of a developing device, a charging device, and a cleaning device as a processing device into a casing.

The existing process cartridge includes the following types: a first process cartridge prepared by assembling a photosensitive drum and a unit composed of a developing device, a charging device, and a cleaning device in a cartridge; by integrally assembling the photosensitive drum and the charging device in the cartridge And a second process cartridge prepared; and a third process cartridge prepared by integrally assembling the photosensitive drum and two processing units composed of a charging device and a cleaning device.

The user himself can detachably mount the above process cartridge to the main assembly of the electrophotographic image forming apparatus. Therefore, the user can perform maintenance of the equipment without relying on professional service personnel, thereby improving the operability of the user for the maintenance of the electrophotographic image forming apparatus. In the above-described conventional process cartridge, it is used to receive a rotational driving force from the apparatus main assembly to drive the photosensitive drum drive mechanism as follows.

On the side of the main assembly, there is provided a rotatable member for transmitting a driving force of the motor, and a non-circular torsion hole for transmitting a driving force of the motor. The torsion hole is disposed at a central portion of the rotatable member, and is provided with a plurality of corner portions and has a A cross section in which the rotatable member rotates integrally.

On the side of the process cartridge, a non-circular torsion projection is provided which is provided at one of the axial ends of the photosensitive drum and has a cross section provided with a plurality of corners. When the process cartridge is attached to the apparatus main assembly, when the rotatable member is rotated in a state where the projection and the hole are engaged with each other, the rotational driving force of the rotatable member is transmitted to the photosensitive drum. As a result, the rotational force for driving the photosensitive drum is transmitted from the apparatus main assembly to the photosensitive drum. Another known mechanism is a process cartridge constructed by driving a photosensitive drum by engaging a gear fixed to the photosensitive drum, thereby driving the photosensitive drum. However, in the US patent US5903803 In the conventional configuration described in the above, when the process cartridge is attached to or detached from the main assembly by moving the process cartridge in a direction substantially perpendicular to the axis of the rotatable member, it is necessary to move the rotatable member in the horizontal direction. . That is, the rotatable member needs to be horizontally moved by the opening and closing operations of the main assembly cover. The hole is separated from the protrusion by the opening operation of the main assembly cover. On the other hand, by the closing operation of the main assembly cover, the hole is moved toward the projection to engage with the projection. Therefore, in the conventional process cartridge, it is necessary to provide a mechanism on the main assembly for moving the rotatable member in the direction of the rotation axis by the opening and closing operations of the main assembly cover. In the US patent US4829335 In the described construction, it is not necessary to move the drive gear provided to the main assembly along its axial direction, and the cartridge can be mounted to and detached from the main assembly by moving in a direction substantially perpendicular to the axis. . However, in this configuration, the drive coupling portion between the main assembly and the process cartridge is the meshing portion between the gears, so that it is difficult to prevent the rotation unevenness of the photosensitive drum.

Another process cartridge is disclosed in the US Patent Application Publication No. US 2008/0152388 A1, which is a modification of the above-described process cartridge in that the drive assembly at one axial end of the photosensitive drum is a ball joint driven joint structure. This drive coupling structure is easy to escape from the drive assembly, especially during transportation, which is more likely to occur, resulting in loss of function or instability of the drive assembly.

technical problem

The main object of the present invention is to provide a drive assembly with improved structure and reliability;

Another object of the present invention is to provide a photosensitive drum constructed with a structurally improved and reliable driving assembly;

It is still another object of the present invention to provide a process cartridge constructed using a structurally improved, reliable drive assembly.

Technical solution

In order to achieve the above object, a drive assembly provided by the present invention includes a gear having a fixed end; an axial adjustment assembly having a rotary driving force receiving head extending beyond the other end of the gear; the axial adjustment assembly is separable An axial direction of the gear and a first direction perpendicular to the axial direction are disposed in the gear in a reciprocating manner relative to the gear, and an elastic support member and an axial limit are disposed between the axial adjustment assembly and the gear a positioning member comprising: a first moving subassembly, an intermediate guiding plate and a central shaft member, the intermediate guiding plate being clamped between the first moving subassembly and the central shaft member; the intermediate guiding plate a guiding gap is formed, the first moving sub-assembly forming a relatively movable fit with the intermediate guiding plate through the guiding notch in a first radial direction perpendicular to the gear axial direction; the central shaft member and the center The gears have a common axis that forms a relatively movable fit with the gear in the axial direction of the gear, which passes through the second radial direction perpendicular to the axial direction of the gear It is formed with notches movable relative to the intermediate guide plate.

A further solution is that the intermediate guiding plate is a circular plate with four "∩"-shaped guiding notches, and the four guiding notches are distributed in a "ten" shape on the intermediate guiding plate; wherein, the first guiding The notch is opposite to the top of the second guiding notch and distributed along the first radial direction, and the third guiding notch is opposite to the top of the fourth guiding notch and distributed along the second radial direction, the first radial direction and the second Radially perpendicular to each other.

Still a further aspect is that the first motion subassembly includes a rotational driving force receiving head and a receiving head holder, the rotational driving force receiving head being rotatably coupled to the receiving head holder about an axis thereof, the rotational driving force A rotation limit pin rotatable about an axis of the rotary driving force receiving head is disposed between the receiving head and the receiving head base; the receiving head seat has an axial through hole and a rotation limiting groove, and the rotation The driving force receiving head has a shaft portion passing through the through hole, and the rotation limiting pin passes through a pin hole on the shaft portion and is placed in the rotation limiting groove.

Still further, the rotary driving force receiving head includes an outer end portion, an intermediate portion, and the shaft portion, and a central portion of the outer end portion is formed with a concave spherical surface, and a circumference of the spherical surface is formed with an axis a first protruding claw, an outwardly extending second claw, and a first cutting surface and a second cutting surface separated by the first claw and the second claw; the surface of the first claw has a first occlusal surface a first inclined surface and a second inclined surface, wherein the surface of the second claw has a second occlusal surface, a third inclined surface and a fourth inclined surface, wherein the first inclined surface, the second inclined surface, the third inclined surface and the fourth inclined surface are formed The outer peripheral edge of the rotational driving force receiving head; the first and second claws, the first and second cutting surfaces are respectively symmetrical with respect to an axis of the rotational driving force receiving head.

A further solution is that the receiving head base is composed of a circular chassis, a support formed on the chassis and a cylindrical boss, and the through hole is a cylindrical through hole formed in the boss. a diameter of the hole is larger than a diameter of the shaft portion and smaller than a diameter of the intermediate portion; a bottom end of the shaft portion passes through the through hole and extends into a central circular hole of the chassis, and a bottom surface of the chassis has a downward direction a protruding first connecting post and a second connecting post, wherein the first connecting post and the second connecting post respectively cooperate with the first connecting nail and the second connecting nail, and the heads of the first connecting nail and the second connecting nail are enlarged to form a limit a leg portion of the first connecting pin and the second connecting pin respectively passing through the first guiding notch and the second guiding notch and being respectively inserted into the first connecting post and the second connecting post, respectively a limiting protrusion on a bottom surface of the chassis axially fixing the intermediate guiding plate to the receiving head seat; the rotation limiting groove is formed inside the bearing, the length of the rotation limiting slot is larger than the Rotating the length of the limit pin, the width of the rotation limit groove is smaller than the rotation limit The length of the pin.

A further solution is that the central shaft member is composed of a top plate and a rod portion, the axial limiting member is a limiting pin; the top plate is a circular plate, and the cross-sectional shape of the rod portion is a drum shape, a lower portion of the rod portion is provided with a pin hole penetrating the rod portion in the radial direction, the pin hole is engaged with the limiting pin; the top surface of the top plate has a third connecting column, a fourth connecting column and a limit protruding upward a protrusion, the third connecting post and the fourth connecting post are engaged with a third connecting nail having a shape of a [[], the head of the third connecting nail spanning the third guiding notch and the fourth guiding of the intermediate guiding plate a notch, the two legs of the third connecting nail pass through the third guiding notch and the fourth guiding notch respectively and are respectively inserted into the third connecting post and the fourth connecting post, respectively, through the head of the third connecting nail and the top of the top plate The limiting protrusion of the surface is restrained from the upper and lower directions to axially fix the intermediate guiding plate to the central shaft member.

In addition, the outer circumferential surface of the gear has a transmission ring gear, and the gear is internally provided with a partition plate perpendicular to the axial direction and a gear cavity located above the partition plate, and a central sleeve is fixed with a sleeve, and the sleeve is fixed The central axis coincides with the central axis of the gear, and the sleeve is provided with a drum-shaped hole having a shape substantially equal to a cross-sectional shape of the rod portion of the central shaft member, the rod portion and the drum-shaped hole A mating movement is achieved; the elastic support member is a helical compression spring.

The photosensitive drum provided by the present invention comprises a drum main body and a drive assembly fixed at one axial end of the drum main body; the drive assembly includes a gear having a fixed end; and an axial adjustment assembly having an outer end extending beyond the other end of the gear a rotational driving force receiving head; the axial adjustment assembly is reciprocally disposed in the gear relative to the gear in a first direction perpendicular to the gear axis and perpendicular to the axial direction, the axial adjustment An elastic support member and an axial limiting member are disposed between the assembly and the gear; the axial adjustment assembly includes a first moving sub-assembly, an intermediate guiding plate and a central shaft member, wherein the intermediate guiding plate is clamped to the first Between the moving subassembly and the central shaft member; the intermediate guiding plate is provided with a guiding notch, and the first moving subassembly passes through the guiding notch and the middle in a first radial direction perpendicular to the gear axial direction The guide plate forms a relatively movable fit; the central shaft member and the gear have a common axis that forms a relatively movable fit with the gear in the gear axial direction, Formed with relatively movable perpendicular to the axial direction of the gear through the second radial guide gap and the intermediate guide plate.

A further solution is that the intermediate guiding plate is a circular plate with four "∩"-shaped guiding notches, and the four guiding notches are distributed in a "ten" shape on the intermediate guiding plate; wherein, the first guiding The notch is opposite to the top of the second guiding notch and distributed along the first radial direction, and the third guiding notch is opposite to the top of the fourth guiding notch and distributed along the second radial direction, the first radial direction and the second Radially perpendicular to each other.

In still another aspect, the first motion subassembly includes a rotational driving force receiving head and a receiving head holder, the rotational driving force receiving head being rotatably coupled to the receiving head holder about an axis thereof, the rotational driving force receiving A rotation limit pin rotatable about an axis of the rotary driving force receiving head is disposed between the head and the receiving head base; the receiving head seat has an axial through hole and a rotation limiting groove, and the rotation driving The force receiving head has a shaft portion passing through the through hole, the rotation limiting pin passes through a pin hole on the shaft portion and is disposed in the rotation limiting groove; the rotating driving force receiving head includes an outer end a central portion, the intermediate portion, and the shaft portion, wherein a central portion of the outer end portion is formed with a concave spherical surface, and a circumference of the spherical surface is formed with an axially outwardly extending first claw, a second claw, and a first cut surface and a second cut surface separated by the first claw and the second claw; a surface of the first claw has a first occlusal surface, a first inclined surface and a second inclined surface, the second convex claw The surface has a second occlusal surface, a third inclined surface and a fourth inclined surface, wherein the first oblique a second inclined surface, a third inclined surface and a fourth inclined surface are respectively formed on an outer peripheral edge of the rotary driving force receiving head; the first claw and the second claw, the first cutting surface and the second cutting surface are respectively driven about rotation The axis of the force receiving head forms a central symmetry; the receiving head block is formed by a circular chassis, a support formed on the chassis and a cylindrical boss, the through hole being a cylindrical passage formed in the boss a hole having a diameter larger than a diameter of the shaft portion and smaller than a diameter of the intermediate portion; a bottom end of the shaft portion passes through the through hole and extends into a central circular hole of the chassis, the chassis The bottom surface has a first connecting post and a second connecting post protruding downward, and the first connecting post and the second connecting post respectively cooperate with the first connecting nail and the second connecting nail, the head of the first connecting nail and the second connecting nail The portion is enlarged to form a limiting portion, and the legs of the first connecting pin and the second connecting pin respectively pass through the first guiding notch and the second guiding notch and are respectively inserted into the first connecting post and the second connecting post, At the same time, the limiting protrusion on the bottom surface of the chassis is used to The guiding plate is axially fixed to the receiving head seat; the rotation limiting slot is formed inside the bearing, the length of the rotating limiting slot is greater than the length of the rotating limiting pin, and the width of the rotating limiting slot Less than the length of the rotation limit pin.

In addition, the central shaft member is composed of a top plate and a rod portion, the axial limiting member is a limiting pin; the top plate is a circular plate, and the cross-sectional shape of the rod portion is a drum shape, and the rod portion is The lower portion is provided with a pin hole extending through the rod portion in the radial direction, the pin hole is engaged with the limiting pin; the top surface of the top plate has a third connecting column, a fourth connecting column and a limiting protrusion protruding upward. The third connecting post and the fourth connecting post cooperate with a third connecting nail having a shape of "[", the head of the third connecting nail spanning the third guiding notch and the fourth guiding notch of the intermediate guiding plate, The two legs of the three connecting nails respectively pass through the third guiding notch and the fourth guiding notch and are respectively inserted into the third connecting post and the fourth connecting post, respectively, through the head of the third connecting nail and the top surface of the top plate The position protrusion is restrained from the upper and lower directions to axially fix the intermediate guide plate to the central shaft member; the outer circumferential surface of the gear has a transmission ring gear, and the gear is internally provided with a partition perpendicular to the axial direction and located a gear chamber above the partition, the center of the partition is fixed with a sleeve a central axis of the sleeve coincides with a central axis of the gear, the sleeve is provided with a drum-shaped hole, and the shape of the drum-shaped hole is substantially equal to the cross-sectional shape of the rod portion of the central shaft member, and the rod portion is A fit of the axial movement is achieved in the drum-shaped bore; the elastic support member is a helical compression spring.

The process cartridge provided by the present invention includes a casing; a photosensitive drum rotatably mounted in the casing; the photosensitive drum includes a drum main body and a driving assembly fixed at one axial end of the drum main body; the driving assembly includes a fixed end gear; an axial adjustment assembly having a rotational drive force receiving head extending beyond the other end of the gear; the axial adjustment assembly being axially and vertically perpendicular to the axial direction a direction is disposed in the gear in a reciprocating manner relative to the gear, and an elastic support member and an axial limiting member are disposed between the axial adjustment assembly and the gear; the axial adjustment assembly includes a first motion a sub-assembly, an intermediate guiding plate and a central shaft member, the intermediate guiding plate being clamped between the first moving sub-assembly and the central shaft member; the intermediate guiding plate is provided with a guiding notch, and the first moving sub-assembly is a relatively movable fit with the intermediate guide plate through the guide notch in a first radial direction perpendicular to the axial direction of the gear; the central shaft member and the gear have a common axis Forming a relatively movable fit with the gear in the axial direction of the gear, and forming a relatively movable fit with the intermediate guide plate through the guide notch in a second radial direction perpendicular to the axial direction of the gear .

A further solution is that the intermediate guiding plate is a circular plate with four "∩"-shaped guiding notches, and the four guiding notches are distributed in a "ten" shape on the intermediate guiding plate; wherein, the first guiding The notch is opposite to the top of the second guiding notch and distributed along the first radial direction, and the third guiding notch is opposite to the top of the fourth guiding notch and distributed along the second radial direction, the first radial direction and the second Radially perpendicular to each other.

Still a further aspect is that the first motion subassembly includes a rotational driving force receiving head and a receiving head holder, the rotational driving force receiving head being rotatably coupled to the receiving head holder about an axis thereof, the rotational driving force A rotation limit pin rotatable about an axis of the rotary driving force receiving head is disposed between the receiving head and the receiving head base; the receiving head seat has an axial through hole and a rotation limiting groove, and the rotation The driving force receiving head has a shaft portion passing through the through hole, the rotation limiting pin passes through a pin hole on the shaft portion and is placed in the rotation limiting groove; the rotating driving force receiving head includes an outer An end portion, an intermediate portion, and the shaft portion, wherein a central portion of the outer end portion is formed with a concave spherical surface, and a circumference of the spherical surface is formed with an axially outwardly extending first claw, a second claw, and a first cut surface and a second cut surface separated by the first claw and the second claw; a surface of the first claw has a first occlusal surface, a first inclined surface and a second inclined surface, the second convex The surface of the claw has a second occlusal surface, a third inclined surface and a fourth inclined surface, wherein the first a face, a second inclined face, a third inclined face and a fourth inclined face are respectively formed on an outer peripheral edge of the rotary driving force receiving head; the first claw and the second claw, the first cutting face and the second cutting face respectively rotate about The axis of the driving force receiving head is formed to be centrally symmetrical; the receiving head base is constituted by a circular chassis, a support formed on the chassis, and a cylindrical boss, the through hole being a cylindrical shape formed in the boss a through hole having a diameter larger than a diameter of the shaft portion and smaller than a diameter of the intermediate portion; a bottom end of the shaft portion passes through the through hole and extends into a central circular hole of the chassis, the chassis The bottom surface has a first connecting post and a second connecting post protruding downward, and the first connecting post and the second connecting post respectively cooperate with the first connecting nail and the second connecting nail, the first connecting nail and the second connecting nail The head is enlarged to form a limiting portion, and the legs of the first connecting pin and the second connecting nail pass through the first guiding notch and the second guiding notch respectively and are respectively inserted into the first connecting post and the second connecting post And simultaneously using the limiting protrusion on the bottom surface of the chassis The guiding plate is axially fixed to the receiving head seat; the rotation limiting slot is formed inside the bearing, the length of the rotating limiting slot is greater than the length of the rotating limiting pin, and the rotation limiting slot is The width is smaller than the length of the rotation limit pin.

In addition, the central shaft member is composed of a top plate and a rod portion, the axial limiting member is a limiting pin; the top plate is a circular plate, and the cross-sectional shape of the rod portion is a drum shape, and the rod portion is The lower portion is provided with a pin hole extending through the rod portion in the radial direction, the pin hole is engaged with the limiting pin; the top surface of the top plate has a third connecting column, a fourth connecting column and a limiting protrusion protruding upward. The third connecting post and the fourth connecting post cooperate with a third connecting nail having a shape of "[", the head of the third connecting nail spanning the third guiding notch and the fourth guiding notch of the intermediate guiding plate, The two legs of the three connecting nails respectively pass through the third guiding notch and the fourth guiding notch and are respectively inserted into the third connecting post and the fourth connecting post, respectively, through the head of the third connecting nail and the top surface of the top plate The position protrusion is restrained from the upper and lower directions to axially fix the intermediate guide plate to the central shaft member; the outer circumferential surface of the gear has a transmission ring gear, and the gear is internally provided with a partition perpendicular to the axial direction and located a gear chamber above the partition, the center of the partition is fixed with a sleeve a central axis of the sleeve coincides with a central axis of the gear, the sleeve is provided with a drum-shaped hole, and the shape of the drum-shaped hole is substantially equal to the cross-sectional shape of the rod portion of the central shaft member, and the rod portion is A fit of the axial movement is achieved in the drum-shaped bore; the elastic support member is a helical compression spring.

DRAWINGS

Figure 1 is a schematic view showing the structure of an embodiment of a photosensitive drum of the present invention;

Figure 2 is a schematic structural view of the drive assembly of Figure 1;

3 is a schematic structural view of another perspective view of the driving assembly shown in FIG. 2;

Figure 4 is a partial cross-sectional view of the drive assembly of Figure 2;

Figure 5 is an exploded view of the drive assembly of Figure 2;

Figure 6 is a schematic structural view of the rotary driving force receiving head of Figure 5;

Figure 7 is a rear elevational view of the rotary driving force receiving head of Figure 6;

Figure 8 is a schematic structural view of the receiving head base of Figure 5;

Figure 9 is a bottom plan view of the receiving head holder shown in Figure 8;

Figure 10 is a schematic structural view of the intermediate guide plate of Figure 5;

Figure 11 is a schematic structural view of the central shaft member of Figure 5;

Figure 12 is a schematic structural view of the gear of Figure 5;

Figure 13 is a schematic view showing the structure of the gear shown in Figure 12;

Figure 14 is a schematic structural view of the first motion subassembly of the drive assembly of Figure 2;

Figure 15 is a schematic structural view of the axial adjustment assembly of the drive assembly of Figure 2;

16a to 16c are schematic diagrams showing the process of the cooperation of the driving assembly and the printer driving head during the process of dropping the process cartridge containing the photosensitive drum shown in FIG. 1;

17a to 17c are schematic diagrams showing the cooperation process of the drive unit and the printer drive head during the offline process of the process cartridge containing the photosensitive drum shown in FIG. 1.

Embodiments of the invention

The process cartridge according to the present invention is substantially the same as the various conventional process cartridges described in the background art, and the photosensitive drum is also substantially the same as the photosensitive drum in the prior art, except that it is constructed at one axial end of the photosensitive drum. The drive assembly is therefore only described in detail below with respect to the embodiment of the drive assembly, and the embodiment of the process cartridge and the photosensitive drum will not be described again.

1 shows an embodiment of a photosensitive drum 10 in which a drive unit 1 of the present invention is constructed. The drive unit 1 is fixed to one end of a drum main body 20 of a photosensitive drum 10, and a photosensitive layer is provided on a circumferential surface of the drum main body 20. The drive unit 1 is for receiving a rotational driving force from the printer driving mechanism, and transmits the rotational driving force to the drum main body 20 to rotate the drum main body 20 about its axis under the rotational driving force.

2 to 5 show the basic configuration of the drive unit 1, and the structure mainly includes a gear 2, a rotary driving force receiving head 3, a receiving head holder 4, an intermediate guide plate 5, a rotation limit pin 6, a center shaft member 9, and a shaft. The sleeve 15, the limit pin 7 and the helical compression spring 8. The gear 2 is tightly fitted to one end of the drum main body 20, the axis of the gear 2 coincides with the axis of the drum main body 20, and rotates about their common axis in synchronization with the drum main body 20. The rotary driving force receiving head 3 is coupled to the receiving head holder 4 by a rotation limiting pin 6, which is reciprocally rotatable relative to the receiving head holder 4 about its axis within a certain angular range; the intermediate guide plate 5 is clamped Between the receiving headstock 4 and the central shaft member 9; the spring 8 is fitted over the central shaft member 9; the central shaft member 9 is fitted in the gear 2 by a limiting pin 7, which is formed with the gear in the axial direction of the photosensitive drum A relatively movable fit.

Here, as shown in FIG. 15, the rotational driving force receiving head 3, the receiving head holder 4, the rotation limiting pin 6, the intermediate guide plate 5, and the center shaft member 9 constitute an axial adjustment unit 11. By the compression of the spring 8 and the axial limit of the limit pin 7, the axial adjustment assembly 11 can perform a limited axial reciprocating translation movement relative to the gear 2 along the axial direction Z of the photosensitive drum. Further, as shown in FIG. 14, the first moving sub-assembly 12 composed of the rotational driving force receiving head 3, the receiving head holder 4, and the rotation limiting pin 6 may be along a first radial direction X perpendicular to the axial direction Z of the photosensitive drum, The first linear reciprocating translation movement is restricted with respect to the intermediate guiding plate 5; and the second moving sub-assembly 14 composed of the first moving sub-assembly 12 plus the intermediate guiding plate 5 can be perpendicular to the axial direction of the photosensitive drum Z. The second radial direction Y is a second linear reciprocating translational movement with respect to the central shaft member 9, the first radial direction X and the second radial direction Y being perpendicular to each other.

Referring to Figures 6 and 7, the rotational driving force receiving head 3 is substantially in the shape of a torch, and the outer end portion 30, the intermediate portion 36, and the shaft portion which are tapered from the outside to the inside (from top to bottom in Fig. 6) 37, the intermediate portion 36 and the shaft portion 37 are both cylindrical, and the shaft portion 37 is provided with a pin hole 38 through which the rotation limiting pin 6 passes. The center position of the outer end portion 30 is formed with a concave spherical surface 35, and a peripheral edge of the spherical surface 35 is formed with a first claw 31 and a second claw 32 which extend in the axial direction, and the first claw 31 and the first claw 31 The two claws 32 form a center symmetry with respect to the axis 39 of the rotational driving force receiving head 3. Furthermore, a circumference of the spherical surface 35 also forms a first section 33 and a second section 34 which are separated by the first claw 31 and the second claw 32 and which also form a central symmetry about the axis 39. The surface of the first claw 31 has a first occlusal surface 313, a first inclined surface 311 and a second inclined surface 312, and the surface of the second claw 32 has a second occlusal surface 323, a third inclined surface 321 and a fourth inclined surface 322, wherein The first occlusal surface 313 and the second occlusal surface 323, the first inclined surface 311 and the third inclined surface 321 , the second inclined surface 312 and the fourth inclined surface 322 respectively form a central symmetry with respect to the axis 39 , and the first inclined surface 311 , the second inclined surface 312 , and the first inclined surface 311 The three inclined faces 321 and the fourth inclined faces 322 are both formed at the outer peripheral edge of the outer end portion 30.

Referring to Figures 8 and 9, the receiving head base 4 is constituted by a circular chassis 46, a support 41 formed on the chassis 46, and a cylindrical boss 45 having an axially through cylindrical through hole 47 therein. The diameter of the through hole 47 is larger than the diameter of the shaft portion 37 of the rotational driving force receiving head 3, and smaller than the diameter of the intermediate portion 36 of the rotational driving force receiving head 3, so that only the shaft portion 37 can be passed therethrough. After the shaft portion 37 passes through the through hole 47, the bottom end thereof extends into the central circular hole 461 of the chassis 46. The bottom surface 48 of the chassis 46 has a first connecting post 42 and a second connecting post 43 protruding downward, the first connection The post 42 and the second connecting post 43 can respectively cooperate with the first connecting nail 16 and the second connecting nail 17 in FIG. 5, and the heads of the first connecting nail 16 and the second connecting nail 17 are enlarged to form a limiting portion, first The leg portions of the connecting pin 16 and the second connecting pin 17 respectively pass through the first guiding notch 51 and the second guiding notch 52 of the intermediate guiding plate 5 described below and are respectively inserted into the first connecting post 42 and the second connecting post 43 respectively. At the same time, the four limiting projections 44 on the bottom surface 48 of the chassis 46 are utilized to axially fix the intermediate guiding plate 5 to the receiving head holder 4, that is, the intermediate guiding plate 5 and the receiving head holder 4 have no relative movement in the axial direction. A rotation limiting slot 411 is defined in the bearing 41. The rotation limiting pin 6 is received in the rotation limiting slot 411. The length of the rotation limiting slot 411 is greater than the length of the rotation limiting pin 6. The rotation limiting slot 411 The width is smaller than the length of the rotation limit pin 6, so that the rotation limit pin 6 can and can only rotate about the axis 49 of the receiving head holder 4 within a certain angular range.

Referring to FIG. 10, the intermediate guide plate 5 is a circular plate having four "∩"-shaped guide notches 51, 52, 53, 54 which are opposite to the top of the second guide notch 52, and the third guide notch 53 is opposite to the top of the fourth guiding notch 54, and the four guiding notches 51, 52, 53, 54 are distributed in a "decagonal" shape on the intermediate guiding plate 5. After the intermediate guiding plate 5 is connected to the receiving head base 4 by the first connecting nail 16 and the second connecting nail 17, the receiving head base 4 can be opposite to the intermediate guiding plate 5 in the first guiding notch 51 and the second guiding notch 52. Sliding back and forth along the first radial direction X.

Referring to Fig. 11, the center shaft member 9 is composed of a top plate 91 and a rod portion 92. The top plate 91 is a circular plate, and the cross-sectional shape of the rod portion 92 is drum-shaped. The lower portion of the rod portion 92 is provided with a pin hole 93 penetrating the rod portion 92 in the radial direction, and the pin hole 93 is engaged with the limit pin 7. Similar to the bottom surface 48 of the chassis 46 of FIG. 9, the top surface of the top plate 91 has a third connecting post 94, a fourth connecting post 95, and four limiting projections 96, which are upwardly convex, and the two connecting posts 94, 95 It can cooperate with the third connecting nail 18 in FIG. 5, the third connecting nail 18 is a "[" shaped connecting nail, the head of the third connecting nail 18 spans the third guiding notch 53 and the fourth of the intermediate guiding plate 5 The guiding gap 56, the two legs of the third connecting nail 18 pass through the third guiding notch 53 and the fourth guiding notch 54 respectively and are respectively inserted into the third connecting post 94 and the fourth connecting post 95, through the third connecting nail 18 The head and the four limiting protrusions 96 on the top surface of the top plate 91 are constrained from the upper and lower directions, thereby axially fixing the intermediate guiding plate 5 to the central shaft member 9, that is, the intermediate guiding plate 5 and the central shaft member 9 There is no relative motion in the axial direction. Meanwhile, after the intermediate guide plate 5 is coupled to the center shaft member 9 by the third connecting nail 18, the intermediate guide plate 5 can utilize the third guide notch 53 and the fourth guide notch 54 in the second radial direction with respect to the central shaft member 9 Y reciprocates.

Referring to Figures 12 and 13, the outer circumferential surface of the gear 2 has a transmission ring gear 24, and the gear 2 is internally provided with a partition 25 perpendicular to the axial direction and a gear chamber 21 above the partition 25, the center of which is The position has a circular hole 22 which is approximately the same size as the cylindrical outer edge cross-sectional shape of the sleeve 15. Referring to Figures 4 and 5, the sleeve 15 is formed with a drum-shaped hole 151 having a shape substantially equal to the cross-sectional shape of the stem portion 92 of the central shaft member 9, and the stem portion 92 can only be Axial movement is achieved within the drum bore 22. The sleeve 15 is a metal piece, and the gear 2 is a plastic piece. The sleeve 15 can be inserted into the gear 2 as an integral member when the gear 2 is injection molded, and the central axis of the sleeve 15 coincides with the central axis of the gear 2.

Referring to Fig. 14, the first moving sub-assembly 12 is composed of a rotary driving force receiving head 3, a receiving head holder 4 and a rotation limiting pin 6, and the shaft portion 37 of the rotational driving force receiving head 3 passes through the through hole 47 of the receiving head holder 4. The rotation limit pin 6 passes through the pin hole 38 of the shaft portion 37 and is placed in the rotation limit groove 411 of the receiving head holder 4.

Referring to Fig. 15, the axial adjustment assembly 11 is composed of a rotary driving force receiving head 3, a receiving head holder 4, a rotation limiting pin 6, an intermediate guide plate 5, and a center shaft member 9. The axial adjustment assembly 11 is axially reciprocally movable relative to the gear 2 along the gear axis Z by compression of the spring 8.

Figs. 16a to 16c are views showing the operation of the process cartridge (only the end portion of the photosensitive drum 20) in which the drive unit 1 is mounted, which falls into the printer, and the process cartridge falls in the direction Xa perpendicular to the axis of the photosensitive drum 20 In the printer, Figs. 17a to 17c show a schematic view of the operation of the process cartridge with the drive unit 1 removed from the printer, and the process cartridge is detached from the printer in the direction Xb of the axis of the vertical photosensitive drum 20. The axial adjustment assembly 11 in the drive assembly 1 integrally moves inward in the direction Za, and the axial adjustment assembly 11 as a whole moves outward in the direction Zb; see Fig. 14, θa represents the clockwise rotation direction of the rotational driving force receiving head 3, and θb represents The rotational driving force receives the counterclockwise rotation direction of the head 3.

The working process is as follows:

1. Push the process cartridge into the printer along the direction Xa;

2. Referring to Figures 16a to 16c, when the drive assembly 1 on the process cartridge is placed in the printer in the direction Xa and contacts the printer drive lever 13, there are two cases to be explained:

1) Referring to FIG. 6, FIG. 7, FIG. 14, FIG. 15, if the initial contact position is the first claw 31 of the rotational driving force receiving head 3, the printer driving lever 13 will hit the two inclined faces of the first claw 31. 311, 312, the two faces must have a weaker force on the face. When the second inclined face 312 is weak, the printer driving lever 13 rubs the second inclined surface 312 to push the rotary driving force receiving head 3 to rotate in the direction θa. After the angle, the printer driving rod 13 automatically cuts into the second cutting surface 34 adjacent to the second inclined surface 312, and causes the axial adjustment assembly 11 in the driving assembly 1 to move integrally in the Za direction; when the first inclined surface 311 is stressed When the printer driving lever 13 is weak, the first driving surface of the first inclined surface 311 is pushed by the rotating driving force receiving head 3 by one angle in the θb direction, and the printer driving lever 13 is also automatically cut into the first cutting adjacent to the first inclined surface 311. On the face 33, and causing the axial adjustment assembly 11 in the drive assembly 1 as a whole to move in the Za direction. Since the second claw 32 is centrally symmetrical with the first claw 31, when the initial contact position is the second claw 32, the action process is similar to the above process;

2. If the initial contact position is the first cut surface 33 or the second cut surface 34, the printer drive rod 13 will automatically cut directly into the first cut surface 33 or the second cut surface 34, and cause the axial adjustment component in the drive assembly. 11 moves in the direction of Za as a whole.

3. With the travel along the direction Xa, the displacement of the axial adjustment assembly 11 in the drive assembly 1 as a whole in the Za direction is gradually increased; when the printer drive lever 13 touches the edge of the spherical surface 35, the axial direction in the drive assembly 1 The adjustment assembly 11 as a whole will move in the direction Zb until the top surface of the printer driving rod 13 substantially coincides with the spherical surface 35;

4. When the printer is started, the printer driving lever 13 is automatically coupled to the rotational driving force receiving head 3, and the rotational driving force receiving head 3 receives the rotational driving force from the printer to drive the drum main body 20 of the photosensitive drum 10 to rotate;

5. When the rotational driving force receiving head 3 receives the driving force of the printer, the driving force from the printer may not be a constant value, and thus the first moving sub-assembly 12 and the second moving sub-assembly 14 in the driving assembly 1 are in a small range. The inner staggered linear movement buffers the change value of the driving force of the printer, so that the photosensitive drum rotates smoothly, does not cause jumping and fluctuation, the processing box works normally, and the printing quality is excellent;

6, Figure 17a ~ Figure 17c, when the printer is stopped, when the process cartridge is removed from the printer, the process cartridge moves in the direction Xb initially, the printer drive lever 13 begins to detach from the rotational driving force receiving head 3;

7. When the printer driving lever 13 touches the edge of the spherical surface 35, the axial adjustment assembly 11 in the driving assembly 1 starts to move integrally along the direction Za;

8. As the displacement amount of the axial adjustment assembly 11 as a whole moves in the direction Za increases, if the printer drive lever encounters the first claw 31 or the second claw 32, the rotary driving force receiving head 3 is pulled along θa or The angle θb is rotated by an angle, so that the printer driving rod 13 is cut into the first cutting surface 33 or the second cutting surface 34;

9. When the printer drive lever 13 is cut into the first cut surface 33 or the second cut surface 34, the axial adjustment assembly 11 as a whole starts to move in the direction Zb until the displacement amount is zero, and the process cartridge can be taken out of the printer.

The above is only a preferred embodiment of the present invention, and it should be noted that those skilled in the art can make various modifications and improvements without departing from the scope of the present invention. The scope of protection of the utility model claims. For example, the limit pin can be implemented using other axial limit structures that are readily apparent to those skilled in the art. The axial stop structure can be a separate member from the central shaft member or a member formed on the central shaft member. section. Further, the elastic supporting member may be replaced by an elastic member other than a helical compression spring, such as an elastic plastic member structure that can be compressed; the cross-sectional shape of the rod portion of the central shaft member and the shape of the through hole on the gear partition plate are not Limited to the drum shape, it may be any shape having two flat sides such as a rectangular shape, a flat quadrangular shape, etc., as long as the axial adjustment assembly can only be axially translated relative to the gear, and cannot be moved and wound radially with respect to the gear. The axis can be rotated.

Industrial applicability

Since the axial adjustment assembly of the photosensitive drum drive assembly of the present invention is reciprocally disposed in the gear axial direction relative to the gear, the elastic adjustment member and the axial limit are disposed between the axial adjustment assembly and the gear a position component, when the process cartridge mounted with the above drive assembly is in the printer slide, the rotary drive force receiving head on the axial adjustment component is kept in the axial direction of the gear under the force of the elastic support member, and The axial limiting component is arranged, and the axial adjustment component is not easy to escape from the gear, thereby ensuring the reliability and stability of the work. When in contact with the printer drive lever, The rotary driving force receiving head wipes the circular surface of the printer driving rod with the respective inclined surface, and the printer driving rod presses the rotating driving force receiving head to move along the photosensitive drum; when the processing box falls to the working position in the printer, The printer driver lever is automatically aligned with the rotary drive force receiving head of the drum drive assembly; when the printer is turned on, At the beginning of the printer driving rod, it is possible to first idle an angle, and then engage with the two claws on the rotating driving force receiving head, thereby driving the photosensitive drum in the process box to rotate, so that the processing box can be used for powder development. Thereby implementing the printing process of the printer.

When the rotational driving force receiving head is driven by the driving force given by the printer driving lever, the rotary driving force receiving head guides the radial reciprocating translation in the gear through the intermediate guide plate, thereby reducing the driving force against the gear and the photosensitive drum from the printer. Radial load; at the same time, since the axial adjustment assembly is held on the central axis of the gear by the central shaft member, it is ensured that the rotary driving force receiving head is axially adjusted and the entire driving assembly when driven by the driving force given by the machine The final driving force received always falls on the center axis of the gear and the photosensitive drum, so that the jumping of the gear and the photosensitive drum with respect to the axis can be greatly reduced.

Therefore, compared with the prior art, the photosensitive drum driving assembly of the present invention is simple and convenient to assemble, and has stable structural performance. The processing cartridge using the photosensitive drum driving assembly has a stable falling machine, reliable performance, and stable operation.

Claims (15)

Drive components, including a gear having a fixed end; An axial adjustment assembly having a rotational driving force receiving head extending beyond the other end of the gear; It is characterized by: The axial adjustment assembly is reciprocally disposed in the gear relative to the gear in a first direction perpendicular to the gear axis and perpendicular to the axial direction, between the axial adjustment assembly and the gear Provided with an elastic support member and an axial limit member; The axial adjustment assembly includes a first motion subassembly, an intermediate guide plate and a central shaft member, the intermediate guide plate being clamped between the first motion subassembly and the central shaft member; the intermediate guide plate is guided a gap, the first moving subassembly forming a relatively movable fit with the intermediate guide plate through the guide notch in a first radial direction perpendicular to the gear axial direction; the central shaft member and the gear have a common axis that forms a relatively movable fit with the gear in the axial direction of the gear, which is formed by the guide notch and the intermediate guide plate in a second radial direction perpendicular to the axial direction of the gear Relatively moving fit. The drive assembly of claim 1 wherein: The intermediate guiding plate is a circular plate with four "∩" shaped guiding notches, and the four guiding notches are distributed in a "ten" shape on the intermediate guiding plate; wherein the first guiding notch and the second guiding hole a top portion of the guiding notch is opposite and distributed along the first radial direction, and a third guiding notch is opposite to a top portion of the fourth guiding notch and distributed along the second radial direction, the first radial direction and the second radial direction being perpendicular to each other . The drive assembly of claim 2 wherein: The first motion subassembly includes a rotational driving force receiving head and a receiving head holder, the rotary driving force receiving head being rotatably coupled to the receiving head holder about an axis thereof, the rotating driving force receiving head and the receiving head A rotation limit pin rotatable about an axis of the rotary driving force receiving head is disposed between the seats; the receiving head seat has an axial through hole and a rotation limiting groove, and the rotary driving force receiving head has Through the shaft portion of the through hole, the rotation limiting pin passes through the pin hole on the shaft portion and is placed in the rotation limiting groove. The drive assembly of claim 3 wherein: The rotational driving force receiving head includes an outer end portion, an intermediate portion, and the shaft portion, and a central portion of the outer end portion is formed with a concave spherical surface, and a circumference of the spherical surface is formed with an axially extending portion a claw, a second claw, and a first cutting surface and a second cutting surface separated by the first claw and the second claw; a surface of the first claw has a first occlusal surface, a first inclined surface, and a second inclined surface, the surface of the second claw has a second occlusal surface, a third inclined surface and a fourth inclined surface, wherein the first inclined surface, the second inclined surface, the third inclined surface and the fourth inclined surface are both formed at the rotational driving force receiving a peripheral edge of the head; the first and second claws, the first and second cutting surfaces are respectively symmetrical with respect to an axis of the rotational driving force receiving head. The drive assembly of claim 4 wherein: The receiving head base is composed of a circular chassis, a support formed on the chassis, and a cylindrical boss. The through hole is a cylindrical through hole formed in the boss, and the diameter of the through hole is larger than a diameter of the shaft portion and smaller than a diameter of the intermediate portion; a bottom end of the shaft portion passes through the through hole and extends into a central circular hole of the chassis, and a bottom surface of the chassis has a first downward convex shape a connecting post and a second connecting post, wherein the first connecting post and the second connecting post respectively cooperate with the first connecting pin and the second connecting pin, and the heads of the first connecting pin and the second connecting pin are enlarged to form a limiting portion, first The connecting nail and the second connecting nail pass through the first guiding notch and the second guiding notch respectively and are respectively inserted into the first connecting post and the second connecting post while utilizing the bottom surface of the chassis Limiting the protrusion to axially fix the intermediate guiding plate to the receiving head seat; the rotation limiting slot is formed inside the bearing, the length of the rotation limiting slot is greater than the rotation limit pin The length of the rotation limiting slot is smaller than the length of the rotation limiting pin. A drive assembly according to any one of claims 2 to 5, wherein: The central shaft member is composed of a top plate and a rod portion, the axial limiting member is a limiting pin; the top plate is a circular plate, the cross-sectional shape of the rod portion is a drum shape, and the lower portion of the rod portion is provided a pin hole extending through the rod portion in the radial direction, the pin hole being engaged with the limiting pin; the top surface of the top plate has a third connecting column protruding upward, a fourth connecting column and a limiting protrusion, and a third The connecting post and the fourth connecting post cooperate with a third connecting nail in a "[" shape, the head of the third connecting nail spans the third guiding notch and the fourth guiding notch of the intermediate guiding plate, and the third connection The two legs of the nail pass through the third guiding notch and the fourth guiding notch respectively and are respectively inserted into the third connecting post and the fourth connecting post, respectively, through the head of the third connecting nail and the limiting convex of the top surface of the top plate The intermediate guide plates are axially fixed to the central shaft member by limiting from the upper and lower directions. The drive assembly of claim 6 wherein: The outer circumferential surface of the gear has a transmission ring gear. The gear is internally provided with a partition plate perpendicular to the axial direction and a gear cavity located above the partition plate. The central position of the partition plate is fixed with a sleeve, and the central axis of the sleeve Coincident with a central axis of the gear, the sleeve is provided with a drum-shaped hole, the shape of the drum-shaped hole is substantially equal to the cross-sectional shape of the rod portion of the central shaft member, and the shaft portion and the shaft-shaped hole realize the shaft Coordination to movement; The elastic support member is a spiral compression spring. Photosensitive drum, including a drum body and a drive assembly fixed at one axial end of the drum body; The drive assembly includes a gear having a fixed end; An axial adjustment assembly having a rotational driving force receiving head extending beyond the other end of the gear; It is characterized by: The axial adjustment assembly is reciprocally disposed in the gear relative to the gear in a first direction perpendicular to the gear axis and perpendicular to the axial direction, between the axial adjustment assembly and the gear Provided with an elastic support member and an axial limit member; The axial adjustment assembly includes a first motion subassembly, an intermediate guide plate and a central shaft member, the intermediate guide plate being clamped between the first motion subassembly and the central shaft member; the intermediate guide plate is guided a gap, the first moving subassembly forming a relatively movable fit with the intermediate guide plate through the guide notch in a first radial direction perpendicular to the gear axial direction; the central shaft member and the gear have a common axis that forms a relatively movable fit with the gear in the axial direction of the gear, which is formed by the guide notch and the intermediate guide plate in a second radial direction perpendicular to the axial direction of the gear Relatively moving fit. The photosensitive drum according to claim 8, wherein: The intermediate guiding plate is a circular plate with four "∩" shaped guiding notches, and the four guiding notches are distributed in a "ten" shape on the intermediate guiding plate; wherein the first guiding notch and the second guiding hole a top portion of the guiding notch is opposite and distributed along the first radial direction, and a third guiding notch is opposite to a top portion of the fourth guiding notch and distributed along the second radial direction, the first radial direction and the second radial direction being perpendicular to each other . The photosensitive drum according to claim 9, wherein: The first motion subassembly includes a rotational driving force receiving head and a receiving head holder, the rotary driving force receiving head being rotatably coupled to the receiving head holder about an axis thereof, the rotating driving force receiving head and the receiving head A rotation limit pin rotatable about an axis of the rotary driving force receiving head is disposed between the seats; the receiving head seat has an axial through hole and a rotation limiting groove, and the rotary driving force receiving head has Passing through the shaft portion of the through hole, the rotation limiting pin passes through the pin hole on the shaft portion and is placed in the rotation limiting groove; The rotational driving force receiving head includes an outer end portion, an intermediate portion, and the shaft portion, and a central portion of the outer end portion is formed with a concave spherical surface, and a circumference of the spherical surface is formed with an axially extending portion a claw, a second claw, and a first cutting surface and a second cutting surface separated by the first claw and the second claw; a surface of the first claw has a first occlusal surface, a first inclined surface, and a second inclined surface, the surface of the second claw has a second occlusal surface, a third inclined surface and a fourth inclined surface, wherein the first inclined surface, the second inclined surface, the third inclined surface and the fourth inclined surface are both formed at the rotational driving force receiving a peripheral edge of the head; the first claw and the second claw, the first cutting surface and the second cutting surface respectively form a center symmetry with respect to an axis of the rotational driving force receiving head; The receiving head base is composed of a circular chassis, a support formed on the chassis, and a cylindrical boss. The through hole is a cylindrical through hole formed in the boss, and the diameter of the through hole is larger than a diameter of the shaft portion and smaller than a diameter of the intermediate portion; a bottom end of the shaft portion passes through the through hole and extends into a central circular hole of the chassis, and a bottom surface of the chassis has a first downward convex shape a connecting post and a second connecting post, wherein the first connecting post and the second connecting post respectively cooperate with the first connecting pin and the second connecting pin, and the heads of the first connecting pin and the second connecting pin are enlarged to form a limiting portion, first The connecting nail and the second connecting nail pass through the first guiding notch and the second guiding notch respectively and are respectively inserted into the first connecting post and the second connecting post while utilizing the bottom surface of the chassis Limiting the protrusion to axially fix the intermediate guiding plate to the receiving head seat; the rotation limiting slot is formed inside the bearing, the length of the rotation limiting slot is greater than the rotation limit pin The length of the rotation limiting slot is smaller than the length of the rotation limiting pin. The photosensitive drum according to any one of claims 8 to 10, characterized in that: The central shaft member is composed of a top plate and a rod portion, the axial limiting member is a limiting pin; the top plate is a circular plate, the cross-sectional shape of the rod portion is a drum shape, and the lower portion of the rod portion is provided a pin hole extending through the rod portion in the radial direction, the pin hole being engaged with the limiting pin; the top surface of the top plate has a third connecting column protruding upward, a fourth connecting column and a limiting protrusion, and a third The connecting post and the fourth connecting post cooperate with a third connecting nail in a "[" shape, the head of the third connecting nail spans the third guiding notch and the fourth guiding notch of the intermediate guiding plate, and the third connection The two legs of the nail pass through the third guiding notch and the fourth guiding notch respectively and are respectively inserted into the third connecting post and the fourth connecting post, respectively, through the head of the third connecting nail and the limiting convex of the top surface of the top plate Positioning from the upper and lower directions to axially fix the intermediate guide plate to the central shaft member; The outer circumferential surface of the gear has a transmission ring gear. The gear is internally provided with a partition plate perpendicular to the axial direction and a gear cavity located above the partition plate. The central position of the partition plate is fixed with a sleeve, and the central axis of the sleeve Coincident with a central axis of the gear, the sleeve is provided with a drum-shaped hole, the shape of the drum-shaped hole is substantially equal to the cross-sectional shape of the rod portion of the central shaft member, and the shaft portion and the shaft-shaped hole realize the shaft Coordination to movement; The elastic support member is a spiral compression spring. Processing box, including Box a photosensitive drum rotatably mounted in the casing; The photosensitive drum includes a drum body and a drive assembly fixed at one axial end of the drum body; The drive assembly includes a gear having a fixed end; An axial adjustment assembly having a rotational driving force receiving head extending beyond the other end of the gear; It is characterized by: The axial adjustment assembly is reciprocally disposed in the gear relative to the gear in a first direction perpendicular to the gear axis and perpendicular to the axial direction, between the axial adjustment assembly and the gear Provided with an elastic support member and an axial limit member; The axial adjustment assembly includes a first motion subassembly, an intermediate guide plate and a central shaft member, the intermediate guide plate being clamped between the first motion subassembly and the central shaft member; the intermediate guide plate is guided a gap, the first moving subassembly forming a relatively movable fit with the intermediate guide plate through the guide notch in a first radial direction perpendicular to the gear axial direction; the central shaft member and the gear have a common axis that forms a relatively movable fit with the gear in the axial direction of the gear, which is formed by the guide notch and the intermediate guide plate in a second radial direction perpendicular to the axial direction of the gear Relatively moving fit. A process cartridge according to claim 12, wherein: The intermediate guiding plate is a circular plate with four "∩" shaped guiding notches, and the four guiding notches are distributed in a "ten" shape on the intermediate guiding plate; wherein the first guiding notch and the second guiding hole a top portion of the guiding notch is opposite and distributed along the first radial direction, and a third guiding notch is opposite to a top portion of the fourth guiding notch and distributed along the second radial direction, the first radial direction and the second radial direction being perpendicular to each other . The process cartridge according to claim 13, wherein: The first motion subassembly includes a rotational driving force receiving head and a receiving head holder, the rotary driving force receiving head being rotatably coupled to the receiving head holder about an axis thereof, the rotating driving force receiving head and the receiving head A rotation limit pin rotatable about an axis of the rotary driving force receiving head is disposed between the seats; the receiving head seat has an axial through hole and a rotation limiting groove, and the rotary driving force receiving head has Passing through the shaft portion of the through hole, the rotation limiting pin passes through the pin hole on the shaft portion and is placed in the rotation limiting groove; The rotational driving force receiving head includes an outer end portion, an intermediate portion, and the shaft portion, and a central portion of the outer end portion is formed with a concave spherical surface, and a circumference of the spherical surface is formed with an axially extending portion a claw, a second claw, and a first cutting surface and a second cutting surface separated by the first claw and the second claw; a surface of the first claw has a first occlusal surface, a first inclined surface, and a second inclined surface, the surface of the second claw has a second occlusal surface, a third inclined surface and a fourth inclined surface, wherein the first inclined surface, the second inclined surface, the third inclined surface and the fourth inclined surface are both formed at the rotational driving force receiving a peripheral edge of the head; the first claw and the second claw, the first cutting surface and the second cutting surface respectively form a center symmetry with respect to an axis of the rotational driving force receiving head; The receiving head base is composed of a circular chassis, a support formed on the chassis, and a cylindrical boss. The through hole is a cylindrical through hole formed in the boss, and the diameter of the through hole is larger than a diameter of the shaft portion and smaller than a diameter of the intermediate portion; a bottom end of the shaft portion passes through the through hole and extends into a central circular hole of the chassis, and a bottom surface of the chassis has a first downward convex shape a connecting post and a second connecting post, wherein the first connecting post and the second connecting post respectively cooperate with the first connecting pin and the second connecting pin, and the heads of the first connecting pin and the second connecting pin are enlarged to form a limiting portion, first The connecting nail and the second connecting nail pass through the first guiding notch and the second guiding notch respectively and are respectively inserted into the first connecting post and the second connecting post while utilizing the bottom surface of the chassis Limiting the protrusion to axially fix the intermediate guiding plate to the receiving head seat; the rotation limiting slot is formed inside the bearing, the length of the rotation limiting slot is greater than the rotation limit pin The length of the rotation limiting slot is smaller than the length of the rotation limiting pin. A process cartridge according to any one of claims 12 to 14, wherein: The central shaft member is composed of a top plate and a rod portion, the axial limiting member is a limiting pin; the top plate is a circular plate, the cross-sectional shape of the rod portion is a drum shape, and the lower portion of the rod portion is provided a pin hole extending through the rod portion in the radial direction, the pin hole being engaged with the limiting pin; the top surface of the top plate has a third connecting column protruding upward, a fourth connecting column and a limiting protrusion, and a third The connecting post and the fourth connecting post cooperate with a third connecting nail in a "[" shape, the head of the third connecting nail spans the third guiding notch and the fourth guiding notch of the intermediate guiding plate, and the third connection The two legs of the nail pass through the third guiding notch and the fourth guiding notch respectively and are respectively inserted into the third connecting post and the fourth connecting post, respectively, through the head of the third connecting nail and the limiting convex of the top surface of the top plate Positioning from the upper and lower directions to axially fix the intermediate guide plate to the central shaft member; The outer circumferential surface of the gear has a transmission ring gear. The gear is internally provided with a partition plate perpendicular to the axial direction and a gear cavity located above the partition plate. The central position of the partition plate is fixed with a sleeve, and the central axis of the sleeve Coincident with a central axis of the gear, the sleeve is provided with a drum-shaped hole, the shape of the drum-shaped hole is substantially equal to the cross-sectional shape of the rod portion of the central shaft member, and the shaft portion and the shaft-shaped hole realize the shaft Coordination to movement; The elastic support member is a spiral compression spring.

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