CN210377045U - Processing box - Google Patents
Processing box Download PDFInfo
- Publication number
- CN210377045U CN210377045U CN201921227314.XU CN201921227314U CN210377045U CN 210377045 U CN210377045 U CN 210377045U CN 201921227314 U CN201921227314 U CN 201921227314U CN 210377045 U CN210377045 U CN 210377045U
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- China
- Prior art keywords
- flange
- process cartridge
- drive shaft
- power receiving
- positioning member
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G21/00—Arrangements not provided for by groups G03G13/00 - G03G19/00, e.g. cleaning, elimination of residual charge
- G03G21/16—Mechanical means for facilitating the maintenance of the apparatus, e.g. modular arrangements
- G03G21/18—Mechanical means for facilitating the maintenance of the apparatus, e.g. modular arrangements using a processing cartridge, whereby the process cartridge comprises at least two image processing means in a single unit
- G03G21/1839—Means for handling the process cartridge in the apparatus body
- G03G21/1857—Means for handling the process cartridge in the apparatus body for transmitting mechanical drive power to the process cartridge, drive mechanisms, gears, couplings, braking mechanisms
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- 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
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- Engineering & Computer Science (AREA)
- Computer Vision & Pattern Recognition (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Electrophotography Configuration And Component (AREA)
Abstract
The utility model discloses a processing box, detachable install to image forming device in, image forming device contains the drive shaft that has the concave part, processing box includes: a photosensitive drum; a frame supporting the photosensitive drum; the driving assembly is arranged at the axial tail end of the photosensitive drum and is used for being meshed with the driving shaft to receive driving force and drive the photosensitive drum to rotate; the driving assembly includes a flange and a power receiving portion mounted on the flange, the power receiving portion having an engaging portion that can enter the recess of the driving shaft, the power receiving portion being movable relative to the flange in a circumferential direction or an axial direction of the flange, the engaging portion forcing the driving shaft to be swung relative to an axis of the flange during mounting of the process cartridge to the image forming apparatus.
Description
Technical Field
The present invention relates to a driving force transmission mechanism used in an image forming apparatus and a process cartridge including the driving force transmission mechanism.
Background
The process cartridge is a cartridge detachably mountable to a main body of the image forming apparatus, and the cartridge includes, as an integral unit, an electrophotographic photosensitive member and at least one of processors such as a charger, a developer, a cleaner, and the like. Since the process cartridge is detachably mounted with respect to the image forming apparatus main body, maintenance of the apparatus is facilitated. An electronic image forming apparatus employing an electrophotographic image forming method is operated as follows: the charger is uniformly charged by light of the image forming apparatus, selective exposure is performed on the electrophotographic photosensitive member to form an electrostatic latent image, the latent image is developed with toner by a developer to form a toner image, and the formed toner image is transferred onto a recording medium by a transfer device to form an image on the recording material.
In the prior art, for example, taiwan patent publication No. TW201633019A, discloses a process cartridge, including a driving assembly, the drive assembly is used for driving the photosensitive drum arranged in the processing box to rotate, a drive shaft is arranged in the image forming device, the drive shaft having a recess disposed circumferentially thereon, the drive assembly having a flange engageable with the drive shaft to receive a driving force, the flange is provided with an engaging part which can enter the notch, the engaging part is supported by an elastically deformable supporting part, the supporting part is connected with the engaging part and the main body part of the flange, when the process cartridge is mounted in the image forming apparatus, the front end of the drive shaft presses the engaging portion to deform the supporting portion so that the front end of the drive shaft can pass over the engaging portion, when the process cartridge is mounted to a predetermined position, the engaging portion is pushed into the notch of the driving shaft by elastic potential energy accumulated after elastic deformation of the supporting portion to engage with the notch, thereby realizing transmission of driving force. However, since the support portion supporting the engagement portion needs to have elasticity and be thin in thickness, the engagement portion may be broken when transmitting the driving force to the main body portion of the flange, resulting in a case where the driving force cannot be transmitted.
In order to solve the problem that the supporting part is thin and easy to break, chinese patent publication No. CN208239812U discloses a processing box, the engaging part is directly fixed on the flange main body or on the inner supporting component positioned at the inner side of the flange, and the driving shaft can be inclined relative to the axial direction, when the process cartridge is mounted in the image forming apparatus, the driving shaft is urged by the engaging portion so that the driving shaft is inclined at a certain angle with respect to the rotation axis thereof to avoid interference between the front end of the driving shaft and the engaging portion, which can solve the problem that the supporting portion is easily broken, but since the inclination angle of the drive shaft in the flange is limited, the projecting amount of the engaging portion in the radial direction of the flange is relatively small, when the driving shaft drives the flange to rotate, the driving shaft can cause an instantaneous impact force to the meshing part, the transient impact may cause local deformation of the engaging portion such that the engaging portion is damaged and broken to fail. In addition, the engagement portion fixedly provided may cause a problem that the process cartridge is difficult to be taken out because the engagement portion is tightly caught in the recess of the driving shaft in the process of taking out the process cartridge from the image forming apparatus. Further, to solve the above-mentioned problem of the thin and easily breakable supporting portion, taiwan patent publication No. TW201807516A discloses a process cartridge in which an engaging portion movable in a radial direction of a flange is provided, a biasing member is provided between the engaging portion and the flange for urging the engaging portion to move in the radial direction of the flange relative to the flange, a driving shaft in an image forming apparatus can urge the engaging portion to move outward in the radial direction when the process cartridge is mounted in the image forming apparatus, and the biasing member can urge the engaging portion to enter a notch of the driving shaft when the driving shaft is mounted in a predetermined position, which can also solve the problem of the easily breakable supporting portion, but since the engaging portion needs to move radially, the engaging portion needs to form a clearance fit with the flange in a circumferential direction of the flange, which can cause looseness when the engaging portion is caught in the notch of the driving shaft, there may occur a problem that the engaging portion is easily slipped out of the recess after a long time use, resulting in failure to receive the driving force.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem above in the prior art, the utility model discloses a realize through following technical scheme:
a process cartridge detachably mountable to an image forming apparatus including a drive shaft having a recess, comprising:
a photosensitive drum;
a frame supporting the photosensitive drum;
the driving assembly is arranged at the axial tail end of the photosensitive drum and is used for being meshed with the driving shaft to receive driving force and drive the photosensitive drum to rotate;
the driving assembly includes a flange and a power receiving portion mounted on the flange, the power receiving portion having an engaging portion that can enter the recess of the driving shaft, the power receiving portion being movable relative to the flange in a circumferential direction or an axial direction of the flange, the engaging portion forcing the driving shaft to be swung relative to an axis of the flange during mounting of the process cartridge to the image forming apparatus. Further, the drive assembly further comprises a positioning member movable relative to the flange at least in the axial direction of the flange, the positioning member being adapted to resist the tendency of the drive shaft to yaw axially. Further, the drive shaft includes a front end portion at a front end and a circumferential surface adjoining the front end portion, and the positioning member has an overlapping area with the circumferential surface in the axial direction of the flange after the drive shaft is engaged with the power receiving portion.
Further, the driving assembly further includes a bottom cover covering the flange, and an elastic member is disposed between the positioning member and the bottom cover.
Further, the flange is provided with a positioning member restricting portion that restricts a movement stroke of the positioning member in the axial direction of the flange.
Further, during mounting of the process cartridge to the image forming apparatus, the drive shaft contacts the positioning member and urges the positioning member to move in a direction opposite to the mounting direction of the process cartridge.
Furthermore, the power receiving part is provided with a positioning concave part which can be sleeved in at least one part of the driving shaft, and after the driving shaft is meshed with the power receiving part, the elastic component pushes the positioning concave part to be sleeved in one part of the front end of the driving shaft.
Further, the flange device also comprises a bottom cover covering the flange, and a positioning member deflection limiting part for limiting the movement of the positioning member in the axial direction perpendicular to the flange is arranged on the bottom cover or the flange.
Further, the engaging portion of the power receiving portion into the recess may be movable by a stroke in the axial direction of the flange relative to the recess during the process cartridge is taken out from the image forming apparatus.
Further, the drive shaft includes a front end portion at a front end and a circumferential surface adjoining the front end portion, the positioning member has an overlapping area m with the circumferential surface in the axial direction of the flange after the drive shaft is engaged with the power receiving portion, and the engaging portion of the power receiving portion entering the recess is movable relative to the recess by a distance n in the axial direction of the flange during the process cartridge is taken out from the image forming apparatus, the length of n being equal to or greater than the length of m as measured in the axial direction of the flange.
After the technical scheme is adopted, the utility model provides a handle box, the drive assembly who handles in the box contains the flange and can be for the meshing portion of flange circumference removal, and this drive assembly's meshing portion intensity is high, and stable in structure is difficult for being extrudeed by the drive shaft and warp, and power transmission is stable. The technical problem of meshing portion easily receive the drive power in-process middle part damage of drive shaft and can not transmit drive power among the prior art is solved.
Drawings
FIG. 1 is a schematic configuration diagram of a drive shaft of an image forming apparatus;
FIG. 2 is a schematic view showing the overall structure of a process cartridge according to embodiment 1 of the present invention;
FIG. 3 is a schematic view of the structure of the driving assembly and the photosensitive drum in embodiment 1 of the present invention;
fig. 4 is a partial structural schematic view of a driving assembly in embodiment 1 of the present invention;
fig. 5 is an exploded schematic view of a drive assembly according to embodiment 1 of the present invention;
fig. 6 is a schematic view of a process of installing the driving assembly into the driving shaft according to embodiment 1 of the present invention;
fig. 7 is a schematic view of the process of detaching the driving assembly from the driving shaft in embodiment 1 of the present invention;
fig. 8 is an exploded schematic view of a drive assembly according to embodiment 2 of the present invention;
fig. 9 is a partial structural schematic view of a driving assembly in embodiment 3 of the present invention;
fig. 10 is a schematic view of a partially exploded structure of a driving assembly according to embodiment 4 of the present invention;
fig. 11 is a partial structural schematic view of a driving assembly in embodiment 4 of the present invention;
fig. 12 is a schematic sectional view of a driving assembly according to embodiment 5 of the present invention;
fig. 13 is a schematic structural view of a drive unit prepared to engage with a drive shaft in an image forming apparatus according to embodiment 6 of the present invention;
fig. 14 is an exploded view of the driving assembly according to embodiment 6 of the present invention;
fig. 15 is a schematic view of a partially exploded structure of a flange and a power receiving portion in embodiment 6 of the present invention;
fig. 16 is a cross-sectional view of the drive assembly in the axial direction according to embodiment 6 of the present invention;
fig. 17 is a schematic structural view of a concave portion of a drive shaft in the image forming apparatus;
fig. 18 is a first process schematic part in embodiment 6 of the present invention in which a drive unit engages with a drive shaft of an image forming apparatus;
fig. 19 is a second process schematic part in embodiment 6 of the present invention in which a drive unit engages with a drive shaft of an image forming apparatus;
fig. 20 is a schematic view showing a process of disengaging the driving unit from the driving shaft of the image forming apparatus according to embodiment 6 of the present invention.
The specific implementation mode is as follows:
in order to make the purpose of the embodiment of the present invention, the technical solution and the technical effect are clearer, and the following description will be made in conjunction with the accompanying drawings to clearly and completely describe the technical solution of the developing cartridge of the present invention. It should be understood that the described embodiment is only a preferred embodiment of the present invention, and not all embodiments, and other embodiments obtained by those skilled in the art without inventive efforts are included in the protection scope of the present invention.
Example 1
As shown in fig. 1, a schematic view of a driving shaft 100 of the image forming apparatus is shown. The drive shaft 100 is substantially cylindrical, and three recesses 100b (only one is shown) are uniformly distributed on the circumferential surface of the drive shaft 100, and a front end portion 100a is further provided at the front end of the drive shaft 100, the front end portion 100a having a round head shape without a notch formed thereon. One end of the driving shaft 100 is connected to a spring 101, and the driving shaft 100 can axially extend toward a1 direction or retract toward a2 direction under the elastic force of the spring 101. The drive shaft 100 has a certain clearance h from the image forming apparatus frame in the direction crossing the axial direction, and when the drive shaft 100 receives an external force in the direction crossing the axial direction, the rotational axis of the drive shaft 100 may be inclined with respect to the rotational axis thereof at a preset position, which is a position at which the drive shaft 100 is free from the external force and is naturally ejected by the spring 101.
As shown in fig. 2, the process cartridge 1 of the present embodiment includes: a frame 2 having a developer accommodating portion for storing a developer; a photosensitive drum 15 rotatably supported on the housing 2; and the driving component 3 is arranged at one axial tail end of the photosensitive drum 15 and is used for receiving the driving force transmitted by the driving shaft of the image forming device and driving the photosensitive drum 15 to rotate.
As shown in fig. 3 to 5, the driving assembly 3 includes a flange 301 and a power receiving portion 4, at least a portion of the flange 301 is in contact with and fixed to an inner circumferential surface 1504 of the photosensitive drum 15, and the flange 301 rotates to rotate the photosensitive drum 15. The flange 301 is provided with a flange 302 for limiting the contact area of the photosensitive drum 15 and the flange 301, and when the photosensitive drum 15 is fitted into the flange 301, the flange 302 stops at the flange 302. The flange 301 can be mounted in the image forming apparatus along the direction D in fig. 3 along the axial direction substantially parallel to the flange 301 along with the process cartridge. The flange has a hollow portion 303, the hollow portion 303 extending in the axial direction of the flange 301 such that the flange 301 is substantially cylindrical, and the drive shaft 100 in the image forming apparatus is inserted into the flange 301 from the hollow portion 303. For convenience of description, an opening portion of the hollow portion 303 of the flange 301 axially distant from the photosensitive drum 15 is referred to as an axially outer side of the flange 301, a side of the flange 301 contacting the photosensitive drum 15 is referred to as an axially inner side of the flange 301, and the flange 301 is attached along with the process cartridge from the axially inner side toward the axially outer side. The power receiving portion 4 is fitted in a first guide groove 304 provided on the axially inner side of the flange 301, and preferably, the first guide groove 304 extends along the axial direction of the flange 301. The power receiving portion 4 includes a guide restricting portion 402, a movement restricting portion 403, and an engaging portion 401, the first guide groove 304 includes a guide surface 3041, the power receiving portion 4 is movable in the first guide groove 304, the movement restricting portion 403 of the power receiving portion 4 is contactable with the inner circumferential surface 1501 of the photosensitive drum 15, a side opposite to the movement restricting portion 403 is contactable with a flange (not shown in the drawings), and the power receiving portion 4 and the engaging portion 401 are restricted from moving relative to the flange 301 in a direction intersecting with an axis of the flange 301 by the flange 301 and the inner circumferential surface 15 of the photosensitive drum 15, preferably, the power receiving portion 4 and the engaging portion 401 are restricted from moving relative to the flange 301 in a radial direction of the flange 301. The length of the first guide groove 304 is s1 and the length of the guide limiter 402 is s2, where s2 is smaller than s1, measured along the axial direction of the flange 301.
As shown in fig. 6 and 7, the engaging portion 401 includes a mounting guide surface 4011 and a dismounting guide surface 4012 disposed axially more inward than the mounting guide surface 4011, when the flange 301 is mounted into the image forming apparatus with the process cartridge, the front end portion 100a of the drive shaft 100 is brought into contact with the mounting guide surface 4011 and is urged to tilt by being mounted to the guide surface 4011, specifically, the rotation axis of the flange 301 is defined as l1, the rotation axis of the drive shaft 100 is defined as l2, the rotation axis l2 of the drive shaft 100 is tilted with respect to the axis of the flange 301 during mounting for normal mounting, since the power receiving portions 4 cannot move in the radial direction of the flange 301 during mounting, if 3 power receiving portions 4 respectively engaging with 3 recesses of the drive shaft 100 are provided on the flange 301, the drive shaft 100 will not be tilted, and therefore, in this embodiment, the power receiving portions are provided as 1 or 2, preferably 2, leaving at least one space where the power receiving portion 4 is not provided to allow the drive shaft 100 to lean. When the drive shaft 100 is mounted to the predetermined position in fig. 7a, following the rotation of the drive shaft, when the engagement portion 401 reaches the position of the alignment recess 100b, the drive shaft 101 can be axially swung by the elastic force of the spring 101 and the rotational centripetal force of the drive shaft itself so that the rotation axis l2 of the drive shaft 100 is substantially coaxial with the rotation axis l1 of the flange 301. When it is necessary to detach the process cartridge, since the engaging portion 401 is movable relative to the flange 301 in the axial direction of the flange 301, instantaneous resistance when the process cartridge is detached from the image forming apparatus can be reduced, that is, the engaging portion 401 can follow the recess 100b by a certain distance, making it easier for the user to take out the process cartridge from the image forming apparatus, and after the process cartridge is detached by a certain stroke, the rotational axis l2 of the drive shaft 100 is forced to be inclined relative to the rotational axis l1 of the flange 301 by the detachment guide surface 4012, and the process cartridge is smoothly taken out.
Example 2
Example 3
Next, embodiment 3 of the present invention is described, and as shown in fig. 9, in order to illustrate a partial structure of a drive assembly in embodiment 2 of the present invention, the power receiving portion 41 is configured to be movable relative to the flange 301 in a circumferential direction of the flange, that is, a rotational direction. The power receiving unit 41 is provided with an engaging unit 4101, a support unit 4104 for supporting the engaging unit 4101, and a sliding guided unit 4103, preferably, the sliding guided unit 4103 is configured as a sliding groove, the flange 301 is provided with a sliding guide unit 306, preferably, a sliding guide projection, the sliding guide projection 306 is inserted into the sliding guide groove 4103, and the arc spanned by the sliding guide groove 4103 is larger than the arc spanned by the sliding guide projection 306, so that the power receiving unit 4 can slide along the sliding guide projection 306, and the distance between the engaging unit 4101 and the center of the flange is maintained during the sliding of the engaging unit 4101 relative to the flange member, so that the engaging unit does not disengage from the recess 100b in the drive shaft 100. Preferably, two engagement portions 4101 and 4102 may be provided on the support portion 4104 to increase stability of power transmission, and alternatively, one engagement portion 4101 may be provided separately. In the present embodiment, when the drive shaft 100 rotates with the operation of the image forming apparatus, since the engaging portion 4101 is movable relative to the flange 301 in the rotational direction of the flange 301, the instantaneous impact force on the engaging portion 4101 when the drive shaft 100 is activated can be reduced, so that the engaging portion 4101 has a longer service life and the stability of power transmission is greatly enhanced. In this embodiment, the driving shaft 100 is inserted into and removed from the flange 301 by using the tilting movement, and the process is the same as that in embodiment 1, and will not be described again.
Example 4
Next, embodiment 4 of the present invention is described, and as shown in fig. 10 and 11, in this embodiment, two engaging portions are provided to be movable independently relative to the flange, and preferably, in order to further increase the stability of the movement of the power receiving portion, a bottom cover 7 is added to the driving assembly. The power receiving portion 42 is provided with a slide guided portion 4202, preferably the slide guided portion 4202 is configured as a wing-shaped projection, the bottom cover 7 is provided with a first slide guide portion 701, preferably the first slide guide portion 701 is configured as a circular-arc projection, the flange 306 is provided with a second slide guide portion 307, preferably the second slide guide portion 306 is configured as a circular-arc projection, a space in which the slide guided portion 4202 is slidable is formed between the first slide guide portion 701 and the second slide guide portion 306, and the movement of the power receiving portion 42 is configured such that the power receiving portion 4202 moves relative to the flange 301 in the rotational direction of the flange 301. Since both the engaging portions 4201 are movable relative to the flange 306 in the flange rotation direction, the impact of the drive shaft 100 on the engaging portions at the moment of starting rotation can be further reduced.
Example 5
Next, as shown in fig. 12, in embodiment 5 of the present invention, in order to make the engaging portion engage with the driving shaft better, and at the same time, for better mounting and dismounting of the processing cartridge, the engaging portion is configured to move toward the center of the circle near the flange in the process of moving in the rotating direction of the flange relative to the flange. In the present embodiment, the slide guide portion 309 is provided on the flange 301, and preferably the slide guide portion 309 is configured as a slide guide groove structure, and the distance from the center of the flange 301 on the upstream side of the slide guided portion 309 in the rotation direction of the flange is larger than the distance from the center of the flange 301 on the downstream side in the rotation direction of the flange. The power receiving portion 44 is provided with the slide guided portion 309, and preferably, the slide guided portion 309 is constructed in a wing-shaped structure, and when the power receiving portion 44 slides in the slide guide portion 309 in the rotational direction of the flange 301, the engaging portion 4401 is simultaneously movable close to the center of the flange 301, specifically, the shortest distance between the engaging portion 4401 and the center of the flange 301 when the power receiving portion is at the most upstream side position of the slide guide portion 309 with respect to the slide guide portion 309 in the rotational direction of the flange 301 is h1, the shortest distance between the engaging portion 4401 and the center of the flange 301 when the power receiving portion is at the downstream side position of the slide guide portion 309 with respect to the slide guide portion 309 in the rotational direction of the flange 301 is h2, and the distance h1 is greater than the distance h2, so that the engaging portion 4401 gradually increases the amount of engagement with the recess 100b of the driving shaft 100 during the rotation of the engaging portion 4401 with the recess 100b, meanwhile, it is possible to allow the drive shaft 100 to be smoothly inserted with a small inclination angle interface when the drive shaft 100 is initially inserted into the flange 301.
Example 6
Next, embodiment 6 of the present invention is described, and as shown in fig. 13 to 16, the drive assembly of the present embodiment is added with a positioning member 8 for positioning the drive shaft 100. The positioning member 8 is movably provided in the drive assembly, and preferably, the positioning member 8 is provided between the flange 301 and the bottom cover 7, an elastic member 9 is provided between the bottom cover 7 and the positioning member 8, the elastic member 9 is preferably a compression spring, a positioning concave portion 801 is provided on the positioning member 8, the positioning member 8 is provided at a position closer to the inner side of the photosensitive drum 15 (see fig. 3) than the power receiving portion 45 in the axial direction of the flange, a positioning member restricting portion 311 is provided on the flange 301, the positioning member restricting portion 311 protrudes in the axial direction of the flange 301 for preventing a problem of difficult machine taking caused by the positioning member 8 being too close to the power receiving portion 45 in the axial direction by contacting the positioning member 8 to restrict the position of the positioning member 8 in the axial direction of the flange, which will be described later. The power receiving portion 45 is installed in the receiving groove 310 of the flange 301, and includes a supporting portion 4502 and a meshing portion 4501, the supporting portion 4502 is movable in the receiving groove 310, for flexibly disposing the power receiving portion 45, the power receiving portion 45 is disposed to be freely movable in the receiving groove without disposing a guide rib or the like, and therefore, an anti-turnover portion 310a is disposed in the receiving groove 310, the power receiving portion 45 is disposed with an anti-turnover contact portion 4502a, preferably, the anti-turnover portion 310a is disposed as an inwardly inclined surface having a wedge structure with an angle with an axis of the flange 301, the anti-turnover contact portion 4502a enters the anti-turnover portion 310a and contacts the anti-turnover portion 310a to prevent the power receiving portion 45 from being turned over with respect to the flange 301 during receiving the driving force of the driving shaft 100, and on the other hand, a bottom surface restricting portion 7011 contacting the bottom surface of the power receiving portion 45 close to the photosensitive drum is also disposed on the, the reverse of the power receiving portion can be further prevented by the contact of the bottom surface of the power receiving portion 45 with the bottom surface restriction portion 7011. When the driving assembly of the present embodiment is installed, the power receiving portion 45 is first installed in the receiving groove 310, then the positioning member 8 is placed on the positioning member limiting portion 311, then the elastic member 9 is placed on the limiting member 8, and finally the bottom cover 7 is covered on the elastic member 9 and the bottom cover 7 is snapped into the flange 301 to complete the installation of the driving assembly. The positioning member 8 is movable relative to the flange 301 at least in the axial direction of the flange 301 under the elastic force of the elastic member 9, and preferably, the elastic member 9 is configured to urge the positioning member 8 to move in the axial direction of the flange 301, but not limited thereto, and the technical effect of the present embodiment can be achieved even if the positioning member 8 moves in a direction forming an angle with the axial direction of the flange 301. The bottom cover 7 is provided with a positioning member deflection preventing limiting portion 710 for limiting the movement of the positioning member 7 in the direction perpendicular to the axial direction of the flange 301, and preferably, the limiting member deflection preventing limiting portion 710 is configured as an inner circumferential surface of the bottom cover 7, and the movement of the positioning member 7 in the direction perpendicular to the axial direction of the flange 301 is limited by the contact between the inner circumferential surface of the bottom cover 7 and the outer circumferential surface of the positioning member 8, but is not limited thereto, and for example, a protrusion may be protruded in the axial direction of the flange 301 to contact the positioning member 8 to limit the movement of the positioning member 8 in the direction perpendicular to the axial direction of the flange 301, as long as the structure for limiting the movement of the positioning member 8 in the direction perpendicular to the axial direction of the flange 301 is realized. As shown in fig. 16 and 17, the recess 100b of the drive shaft 100 of the image forming apparatus has a drive surface 100b1 and a disengaging guide slope 100b2, and is a front end portion 100a of an arc shape at the front end, and a circumferential surface 100c at a position where the drive shaft 100 abuts the front end portion 100a extends in a direction substantially parallel to the axis of the drive shaft, and the positioning recess 801 of the positioning portion 8 has a swing restriction engageable with the circumferential surface 100c, and preferably the swing restriction portion 801a is configured as a cylindrical recess, and the swing of the drive shaft 100 with respect to its own rotation axis in the drive assembly 3 can be restricted by the contact of the swing restriction portion 801a with the circumferential surface 100c, and preferably, an arc-shaped second swing restriction portion 801b is provided adjacent to the positioning surface 801a, and the contact position of the second swing restriction portion 801b with the drive shaft 100 is different from the contact position of the swing restriction portion 801a with the drive shaft 100, the second swing restricting portion 801b is in contact with the arc-shaped front end portion 100a of the drive shaft 100, and the contact between the second swing restricting portion 801b and the front end portion 100a can further restrict the swing of the drive shaft 100 in the drive assembly, and can also restrict the position of the drive shaft 100 in the axial direction relative to the drive assembly.
The disengagement process of the engagement of the drive assembly and the drive shaft of the present embodiment will be described with reference to the drawings.
Engagement of drive assembly with drive shaft
As shown in fig. 18 and 19, during the engagement of the drive assembly 3 with the drive shaft 100 in the axial direction, the power receiving portion 45 abuts against the front end portion 100a of the drive shaft 100 to force the drive shaft 100a to deflect toward the inner wall on the side closer to the flange 301, in fig. 18, the drive shaft 100 is first abutted by the power receiving portion 45 in the deflection position shown by a in fig. 18, as the process cartridge is further mounted and advanced, the deflected drive shaft 100 continues to abut against the drive shaft 45 to maintain the deflection position and enters the deflection position shown by b in fig. 18, which is the position where the drive shaft 100 abuts against the wall near the positioning recess 801 of the positioning portion 8 and applies pressure to the positioning portion 8, in fig. 19, as the process cartridge is further mounted and the positioning portion 8 after the pressure is applied by the drive shaft 100 moves toward the bottom cover 7 against the elastic force of the elastic member 9, the elastic member 9 is elastically deformed to give the positioning portion 8 a tendency to move toward the direction approaching the drive shaft 100 by the elastic force, at this time, the process cartridge has been mounted in position, the drive shaft 100 is maintained at the yawing position shown by a in fig. 19 and is started to be rotated by the image forming apparatus about the direction R in the drawing, as the drive shaft 100 rotates, when the power receiving portion 45 is positionally aligned with the recess 100b of the drive shaft 100, the engaging portion 4501 on the power receiving portion 45 enters the recess 100b to effect engagement of the drive assembly with the drive shaft, the drive shaft 100 is at the righting position shown by b in fig. 19 under its own axial centripetal force and the force applied to the drive shaft 100 by the positioning portion 8, the righting position is such that the positioning member 8 moves toward the drive shaft 100 by the urging force of the elastic member 9 to the positioning member 8 and the positioning recess 801 is caused to telescope into a part of the front end of the drive shaft, the swing restricting portion 801a of the positioning member 8 has an overlapping area m with the circumferential surface 100c of the drive shaft 100 in the axial direction of the flange, which ensures that the drive shaft 100 may be swung due to uneven circumferential force applied to the power receiving portion 45 when the drive shaft 100 is rotating in the drive assembly 3, in other words, if the drive shaft 100 has a tendency to swing during rotation of the drive assembly 3, the swing restricting portion 801a prevents the drive shaft 100 from having a tendency to swing by contacting the circumferential surface 100c of the drive shaft 100, so that the drive shaft 100 always maintains a righting position shown in b of fig. 19, which can be understood as the rotation axis of the drive shaft 100 is substantially coaxial with the rotation axis of the drive assembly 3. In addition, at the righting position, the second swing restricting portion 801b abuts on the front end portion 100a of the drive shaft 100 to further restrict the tendency of the drive shaft 100 to swing.
Disengagement of drive assembly from drive shaft
As shown in fig. 20, in order to facilitate disengagement of the drive unit from the drive shaft, when the process cartridge is taken out in the direction P shown by a in fig. 20, the engaging portion 4501 is moved in the axial direction of the flange 301 relative to the recessed portion 100b of the drive shaft 100 by a distance n, which is preferably set to be greater than or equal to the overlapping area m of the swing restricting portion 801a of the positioning member 8 and the circumferential surface 100c of the drive shaft 100 in the axial direction of the flange 301, and by this arrangement, when the lead-out inclined surface 4501a of the power receiving portion 45 comes into contact with the release guide inclined surface 100b2 of the drive shaft, the circumferential surface 100c of the drive shaft can be brought out of contact with the runout restricting portion 801a, that is, in the axial direction of the flange 301, without an overlapping area between the circumferential surface 100c and the runout restricting portion 801a, and at this time, as the process cartridge is further withdrawn, the drive shaft 100 is deflected into the deflected position shown as b in fig. 20 by the contact of the lead-out inclined surface 4501a of the power receiving portion 45 with the disengaging guide inclined surface 100b2 of the drive shaft, and the process cartridge is continuously withdrawn, and the drive shaft 100 maintains the deflected state until it is completely disengaged from the drive assembly and finally disengaged from the drive assembly.
The utility model discloses compel in embodiment 2 to push away the part and the locating component in embodiment 6, not only can be used for relevant embodiment, also be applicable to other all embodiments equally, can all play the trend that prevents the drive shaft at the in-process of drive assembly because the drive shaft that the power receiving part atress is uneven in week and lead to produces the beat for the effect of the stable meshing of concave part in meshing portion and the drive shaft in the processing box.
The utility model provides a processing box, including drive assembly, this drive assembly's meshing portion intensity is high, and stable in structure is difficult for being extruded by the drive shaft and warp, and power transmission is stable. The technical problem of meshing portion easily receive the drive power in-process middle part damage of drive shaft and can not transmit drive power among the prior art is solved.
The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.
Claims (10)
1. A process cartridge detachably mountable to an image forming apparatus including a drive shaft having a recess, comprising:
a photosensitive drum;
a frame supporting the photosensitive drum;
the driving assembly is arranged at the axial tail end of the photosensitive drum and is used for being meshed with the driving shaft to receive driving force and drive the photosensitive drum to rotate;
wherein the driving assembly includes a flange and a power receiving portion mounted on the flange, the power receiving portion having an engaging portion that can enter the recess of the driving shaft, the power receiving portion being movable relative to the flange in a circumferential direction or an axial direction of the flange, the engaging portion forcing the driving shaft to deflect relative to an axis of the flange during mounting of the process cartridge to the image forming apparatus.
2. A process cartridge according to claim 1, wherein said drive assembly further comprises a positioning member movable relative to said flange at least in an axial direction of said flange, said positioning member serving to resist a tendency of said drive shaft to yaw on the axis.
3. A process cartridge according to claim 2, wherein said drive shaft includes a front end portion at a front end and a circumferential surface adjoining said front end portion, and said positioning member has an overlapping area with said circumferential surface in an axial direction of said flange after said drive shaft is engaged with said power receiving portion.
4. A process cartridge according to claim 2, wherein said driving assembly further comprises a bottom cover covering said flange, and an elastic member is disposed between said positioning member and said bottom cover.
5. A process cartridge according to claim 2, wherein a positioning member regulating portion which regulates a moving stroke of said positioning member in an axial direction of said flange is provided on said flange.
6. A process cartridge according to claim 2, wherein said driving shaft contacts said positioning member and urges said positioning member to move in a direction opposite to the cartridge mounting direction during mounting of said process cartridge to said image forming apparatus.
7. A process cartridge according to claim 2, further comprising an elastic member urging said positioning member to move, said positioning member being provided with a positioning recess which is fitted over at least a part of said driving shaft, said elastic member urging said positioning recess to fit over a part of a front end of said driving shaft when said driving shaft is engaged with said power receiving portion.
8. A process cartridge according to claim 2, further comprising a bottom cover covering said flange, wherein a positioning member runout restricting portion which restricts movement of said positioning member in a direction perpendicular to an axis of said flange is provided on said bottom cover or said flange.
9. A process cartridge according to claim 1, wherein the engaging portion of said power receiving portion into said recess is movable relative to said recess by a stroke in the axial direction of said flange during removal of said process cartridge from said image forming apparatus.
10. A process cartridge according to claim 2, wherein said drive shaft includes a front end portion at a front end and a circumferential surface adjoining said front end portion, said positioning member has an overlapping area m with said circumferential surface in the axial direction of said flange after said drive shaft is engaged with said power receiving portion, and an engaging portion of said power receiving portion into said recess is movable relative to said recess in the axial direction of said flange by a distance n, a length of n being equal to or greater than a length of m, measured in the axial direction of said flange, during removal of said process cartridge from said image forming apparatus.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920439235 | 2019-04-02 | ||
| CN2019204392359 | 2019-04-02 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210377045U true CN210377045U (en) | 2020-04-21 |
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Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921227314.XU Active CN210377045U (en) | 2019-04-02 | 2019-07-31 | Processing box |
| CN201910703309.XA Pending CN111766768A (en) | 2019-04-02 | 2019-07-31 | Processing box |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910703309.XA Pending CN111766768A (en) | 2019-04-02 | 2019-07-31 | Processing box |
Country Status (1)
| Country | Link |
|---|---|
| CN (2) | CN210377045U (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114488745B (en) * | 2020-11-12 | 2023-10-31 | 纳思达股份有限公司 | Process cartridge |
-
2019
- 2019-07-31 CN CN201921227314.XU patent/CN210377045U/en active Active
- 2019-07-31 CN CN201910703309.XA patent/CN111766768A/en active Pending
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| Publication number | Publication date |
|---|---|
| CN111766768A (en) | 2020-10-13 |
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