CN210666367U

CN210666367U - Processing box

Info

Publication number: CN210666367U
Application number: CN201922120905.3U
Authority: CN
Inventors: 何永刚
Original assignee: Print Rite Unicorn Image Products Co Ltd
Current assignee: Print Rite Unicorn Image Products Co Ltd
Priority date: 2019-11-28
Filing date: 2019-11-28
Publication date: 2020-06-02
Anticipated expiration: 2029-11-28

Abstract

The utility model provides a processing box, which comprises a drum frame, a developing frame, a photosensitive drum, a developing roller driving component and a separating mechanism, wherein the developing frame rotates between a contact position and a spacing position relative to the drum frame, the developing roller driving component comprises a driving head, a transmission gear, a moving part, an elastic part, a driving end cover and a pushing and pressing part, a driving gear at one end of the developing roller is meshed with the transmission gear, the moving part can be connected with the transmission gear along the axial movement of the transmission gear, one end of the moving part can be connected with the driving head, the elastic part forces the moving part to be close to the driving head, the driving end cover comprises a guiding part, the pushing and pressing part comprises a guided part which rotates to the spacing position from the contact position, through the cooperation of guide portion and guided portion, the drive moving part makes between moving part and the drive head separation along the axial displacement of transmission gear. The processing box has the advantages of good working stability, simple structure, low production cost and high production efficiency.

Description

Processing box

Technical Field

The utility model belongs to the technical field of the printing consumables technique and specifically relates to a detachably installs imaging device's processing box is related to.

Background

An electrophotographic image forming apparatus generally has therein an image processing unit and a developing unit, and develops an electrostatic latent image formed on the image processing unit with a developer such as toner supplied from the developing unit to form a visible image on a medium such as paper. In which toner is used as a consumable product and needs to be continuously replenished into an electrophotographic image forming apparatus, it is common to supply toner to a developing unit having a process cartridge accommodating a certain amount of toner detachably mounted to the developing unit in the electrophotographic image forming apparatus.

Referring to fig. 1 and 2, a conventional process cartridge 1 includes a driving assembly, a developing roller 14, an agitating frame (not shown), a powder feeding roller (not shown), and a photosensitive drum 13, the driving assembly includes a first driving assembly 11 and a second driving assembly 12, the first driving assembly 11 drives the photosensitive drum 13 to rotate, the second driving assembly 12 drives the developing roller 14, the agitating frame, and the powder feeding roller to rotate, and the second driving assembly 12 includes a clutch 121, a second driving head 122, a driving gear 123, and a spring 124. During the image formation of the process cartridge 1 in the image forming apparatus, the clutch 121 and the spring 124 connect the second driving head 122 with the driving gear 123, the first driving assembly 11 receives the driving force of the first driving head in the image forming apparatus to drive the photosensitive drum 13 to rotate, and the second driving head 122 receives the driving force of the second driving head in the image forming apparatus to drive the developing roller 14, the agitator and the powder feeding roller to rotate. When the process cartridge 1 is in the process of printing in the image forming apparatus, the photosensitive drum 13 needs to be cleaned at the printing gap in order to improve the printing quality, since the photosensitive drum 13 and the developing roller 14 are always in contact at the time of printing, and during the cleaning process, the two are separated. In the state of cleaning the photosensitive drum 13, the clutch 121 separates the second driving head 122 from the driving gear 123, the second driving head in the imaging device continues to drive the second driving head 122 to rotate, the driving gear 123 stops rotating because the driving gear 123 is separated from the second driving head 122, and meanwhile, the developing roller 14, the stirring frame and the powder feeding roller all stop rotating, at this time, the first driving head in the imaging device continues to drive the first driving assembly 11 to rotate, so as to drive the photosensitive drum 13 to rotate, and thus, the cleaning of the residual powder on the photosensitive drum 13 is realized.

Therefore, during image formation and cleaning, the clutch 121 needs to be switched back and forth between a connection position at which the driving gear 123 is connected to the second driving head 122 and a disengagement position at which the driving gear 123 is separated from the second driving head 122, and if the clutch 121 is damaged during operation, the driving force cannot be transmitted to the developing roller 14, which may affect normal use of the image forming apparatus, and in addition, the back and forth switching of the clutch 121 may reduce the operating efficiency of the image forming apparatus, and if the clutch 121 is not moved to a preset position during switching of the position, the driving force transmission of the image forming apparatus may be affected. In addition, the second driving assembly 12 has a complicated structure and high assembly difficulty, which increases the cost and reduces the production efficiency of the process cartridge.

Disclosure of Invention

In order to solve the problems, the main object of the present invention is to provide a processing box with low production cost, high production efficiency and good working stability.

In order to achieve the above-mentioned main object, the present invention provides a process cartridge detachably mountable to an image forming apparatus, the process cartridge comprising a drum frame, a developing frame, a photosensitive drum, a developing roller driving assembly and a separating mechanism, the photosensitive drum being rotatably supported on the drum frame, the developing roller being rotatably supported on the developing frame, the developing frame rotating between a contact position and a spaced position with respect to the drum frame, at the contact position, the photosensitive drum being in contact with the developing roller, at the spaced position, the photosensitive drum being separated from the developing roller, the developing roller driving assembly comprising a driving head, a transmission gear, a movable member, an elastic member, a driving end cap and a pushing member, one end of the developing roller being connected to the driving gear, the driving gear being engaged with the transmission gear, the movable member being movably connected to the transmission gear in an axial direction of the transmission gear, one end of the movable member being connectable, the elastic component forces the moving part to be close to the driving head, the driving head is used for receiving the rotating force of the imaging device, the driving end cover is installed on the developing frame and located on the same side of the processing box with the transmission gear, the driving end cover comprises a guiding part, the pushing and pressing component comprises a guided part, the pushing and pressing component rotates to an interval position from a contact position along with the developing frame, and through the cooperation of the guiding part and the guided part, the driving moving part enables the moving part and the driving head to be separated along the axial movement of the transmission gear.

It can be seen from the above scheme that, drive gear and transmission gear intermeshing, the moving part can be connected with transmission gear along transmission gear's axial displacement ground, the one end of moving part can be connected with the drive head, the elastic component forces the moving part to be close to the drive head, the drive head is used for receiving image forming device's revolving force, the drive end cover is installed on development frame and is located the same one side of processing box with transmission gear, the drive end cover includes the guide portion, bulldoze the piece and include by the guide portion, along with development frame rotates to the interval position from the contact position, through the cooperation of guide portion with by the guide portion, the drive moving part makes separation between moving part and the drive head along transmission gear's axial displacement, the realization is cleaned the sensitization drum. Moreover, the processing box has simple structure, and can effectively reduce the production cost and improve the production efficiency. Meanwhile, when the processing box is placed on the imaging device or taken out of the imaging device, the resistance is small, and the installation or taking-out operation is more convenient and labor-saving.

The body of the pushing piece is of a circular ring structure, the end face, close to the driving end cover, of the circular ring structure is protruded to form a guided portion, the guided portion extends towards the axis of the circular ring structure along the circular ring structure in the radial direction, the moving piece extends along the axial direction of the transmission gear to form a circular table, one end of the circular table can be connected with the driving head, the circular ring structure is sleeved on the circular table in a clearance fit mode, and the guided portion abuts against one end face of the circular table.

The further scheme is that, the transmission gear is equipped with the chamber that holds in its axial one end is open, it is equipped with the input arm that extends towards the radial center of transmission gear on the inner wall of chamber parallel to the axial of transmission gear, the moving part still is provided with the guide arm, the one end of guide arm and the other end of round platform are connected and are followed the axial extension of transmission gear, be equipped with the horizontal outside output arm that extends along the guide arm on the horizontal outer wall of guide arm, the guide arm is located and holds the intracavity, in the circumference of transmission gear, the output arm can form with the input arm and lean on the contact.

In a further aspect, the resilient member is a spring that is biased between the bottom of the receiving cavity and the output arm.

The further scheme is that the bottom of the accommodating cavity is convexly provided with a cylinder, the spring is sleeved on the cylinder, and the other end of the guide rod is in clearance fit with a hole of the cylinder.

The driving head is provided with a plurality of grooves, and the protrusions can be inserted into the grooves.

In a further aspect, the process cartridge further includes a holding end cap mounted on an outer side of the driving end cap, and the driving head is rotatably supported on the holding end cap.

Further, the driving end cap includes two guiding portions, and the pushing member includes two guided portions, the two guiding portions being located between the two guided portions, and one guiding portion being engaged with one guided portion.

In a further scheme, the surfaces of the guiding part and the guided part which are in butt fit are all inclined surfaces.

Further, the two inclined planes of the two guided parts which are respectively in interference fit with the two guiding parts are opposite in inclination direction.

Drawings

Fig. 1 is a structural view of a conventional process cartridge.

Fig. 2 is a partially exploded view of a conventional process cartridge.

Fig. 3 is a structural view of an embodiment of the process cartridge of the present invention.

Fig. 4 is a first partial structural view of the embodiment of the process cartridge of the present invention.

Fig. 5 is a second partial structure of the embodiment of the process cartridge of the present invention.

Fig. 6 is a structural view of a driving end cap in an embodiment of the process cartridge of the present invention.

Fig. 7 is a partial structural view of a developing roller driving assembly in an embodiment of the process cartridge of the present invention.

Fig. 8 is a partially exploded view of a developing roller driving assembly in an embodiment of the process cartridge of the present invention.

Fig. 9 is a structural view of a transfer gear in an embodiment of the process cartridge of the present invention.

Fig. 10 is a structural view of a driving head in an embodiment of the process cartridge of the present invention.

FIG. 11 is a view showing a structure of a pushing member in an embodiment of the process cartridge of the present invention.

Fig. 12 is a partial sectional view of a developing roller driving assembly in an embodiment of the process cartridge of the present invention.

The present invention will be further explained with reference to the drawings and examples.

Detailed Description

Referring to fig. 3 to 5, the process cartridge 2 is detachably mountable to the image forming apparatus, the process cartridge 2 includes a drum frame 21, a developing frame 24, a photosensitive drum 22, a developing roller 25, a holding end cap 26, a photosensitive drum driving assembly 23, a developing roller driving assembly, and a separating mechanism, the photosensitive drum 22 is rotatably supported on the drum frame 21, and the developing roller 25 is rotatably supported on the developing frame 24. The photosensitive drum driving assembly 23 and the developing roller driving assembly are located on the same side of the process cartridge 2, and the photosensitive drum driving assembly 23 is configured to receive a first rotational force of the image forming apparatus and drive the photosensitive drum 22 to rotate. The developing frame 24 rotates relative to the drum frame 21 between a contact position where the photosensitive drum 22 is in contact with the developing roller 25 and a spaced position where the photosensitive drum 22 is spaced apart from the developing roller 25.

Referring to fig. 6 to 12, the developing roller driving assembly includes a driving head 27, a transmission gear 30, a movable member 31, an elastic member 32, a driving end cap 28, and an urging member 29, and a driving gear 251 is connected to one end of the developing roller 25, the driving gear 251 and the transmission gear 30 being engaged with each other. The movable member 31 is movably connected to the transmission gear 30 in the axial direction of the transmission gear 30, one end of the movable member 31 is connected to the driving head 27, the elastic member 32 urges the movable member 31 to approach the driving head 27, and the driving head 27 is configured to receive a second rotational force of the image forming apparatus. The drive end cover 28 is mounted on the developing frame 24 on the same side of the process cartridge 2 as the transmission gear 30, the drive end cover 28 includes a guide portion 281, and the urging member 29 includes a guided portion 291. As the developing frame 24 rotates from the contact position to the spaced position, the driving movable piece 31 moves in the axial direction of the transmission gear 30 by the cooperation of the guide portion 281 and the guided portion 291 so that the movable piece 31 and the driving head 27 are separated from each other.

Referring to fig. 9, the transfer gear 30 is provided with an accommodation chamber 301 opened at one axial end thereof, and two input arms 302 extending toward the radial center of the transfer gear 30 are provided on the inner wall of the accommodation chamber 301 parallel to the axial direction of the transfer gear 30, the two input arms 302 being symmetrically arranged about the axis of the transfer gear 30. The bottom of the accommodating cavity 301 is convexly provided with a cylinder 303, and the elastic member 32 is a spring, and the spring 32 is sleeved on the cylinder 303.

Referring to fig. 8, the movable member 31 is located in the accommodating cavity 301, a circular truncated cone 311 extends from the movable member 31 along the axial direction of the transmission gear 30, four protrusions 312 are arranged on one end surface of the circular truncated cone 311, and the four protrusions 312 are uniformly distributed around the axis of the circular truncated cone 311. The movable member 31 is further provided with a guide rod 313, one end of the guide rod 313 is connected with the other end of the circular truncated cone 311 and extends along the axial direction of the transmission gear 30, and the other end of the guide rod 313 is in clearance fit with the hole of the cylinder 303 in the accommodating cavity 301. Two output arms 314 extending outward in the transverse direction of the guide bar 313 are provided on the transverse outer wall of the guide bar 313, and the two output arms 314 are symmetrically arranged about the axis of the guide bar 313. In the circumferential direction of the transfer gear 30, the two input arms 302 and the two output arms 314 are arranged alternately. Also, in the circumferential direction of the transfer gear 30, the two output arms 314 may be brought into abutting contact with the two input arms 302, respectively. Wherein the spring 32 is pressed between the bottom of the receiving chamber 301 and the output arm 314.

Referring to fig. 10, the driving head 27 sequentially extends the driving force receiving portion 271 and the disk 272 connected to each other along the axial direction of the transmission gear 30, the disk 272 is provided with four grooves 273, the four grooves 273 are all disposed through the disk 272, the four grooves 273 are uniformly distributed around the axis of the disk 272, and the four protrusions 312 on the circular truncated cone 311 can be respectively inserted into the four grooves 273. The holding cover 26 is mounted on the outer side of the drive cover 28, and the drive force receiving portion 271 of the drive head 27 is rotatably supported on the holding cover 26.

Referring to fig. 11, the body of the pushing element 29 is a circular ring structure, and the circular ring structure is sleeved on the circular platform 311 of the movable element 31 in a clearance fit manner. The end surface of the circular ring structure close to the driving end cover 28 is protruded to form two guided portions 291, and the two guided portions 291 are arranged symmetrically with respect to the axis of the circular ring structure. The two guided portions 291 extend radially along the annular structure toward the axis of the annular structure, and both the guided portions 291 abut against one end surface of the circular truncated cone 311.

Referring to fig. 6 to 12, the developing frame 24 is provided with a force receiving portion 241, and the force receiving portion 241 may receive the force of the image forming apparatus to rotate the developing frame 24 from the contact position to the spaced position. The drive end cover 28 includes two guide portions 281, the two guide portions 281 being located between the two guided portions 291, and one guide portion 281 being fitted with one guided portion 291. The surfaces of the guide portion 281 and the guided portion 291 which are in contact with each other are

inclined surfaces

282 and 292, and the two inclined surfaces 292 of the two guided portions 291 which are in contact with the two guide portions 281 are inclined in opposite directions. As the developing frame 24 rotates from the contact position to the spaced position, the two guide portions 281 of the driving end cover 28 also rotate, so that the movable element 31 is driven to move in the axial direction of the transmission gear 30 by the two guide portions 281 respectively coming into contact with the two guided portions 291, thereby separating the movable element 31 from the driving head 27.

When the process cartridge 2 is mounted to the image forming apparatus, in a normal printing state of the image forming apparatus, the force receiving portion 241 of the developing frame 24 does not receive the acting force of the image forming apparatus, the developing frame 24 is at a contact position with respect to the drum frame 21, the developing roller 25 contacts with the photosensitive drum 22, the movable member 31 and the driving head 27 are in connection and cooperation, the driving head 27 receives the second rotating force of the image forming apparatus to drive the transmission gear 30 to rotate, and since the driving gear 251 and the transmission gear 30 are meshed with each other, the driving gear 251 receives the driving force of the transmission gear 30 to drive the developing roller 25 to rotate, and meanwhile, the photosensitive drum driving assembly 23 receives the first rotating force of the image forming apparatus and drives the photosensitive. During printing of the process cartridge 2, the photosensitive drum 22 and the developing roller 25 are both in a rotating state, and the developing roller 25 is in contact with the photosensitive drum 22, so that toner is stably transferred from the developing roller 25 to the photosensitive drum 22, and laser printing such as a series of exposure, development, transfer printing and the like is realized on printing paper.

When the image forming apparatus needs to clean the photosensitive drum 22, the cleaning unit of the image forming apparatus applies a force to the force receiving portion 241 of the developing frame 24, and as the force receiving portion 241 receives the force of the image forming apparatus, the developing frame 24 is driven to rotate from the contact position to the spaced position, so that the developing roller 25 is separated from the photosensitive drum 22. At the same time, as the developing frame 24 rotates from the contact position to the spaced position, the guide portion 281 of the driving end cap 28 also rotates, so that the movable element 31 is driven to move in the axial direction of the transmission gear 30 by the guide portion 281 being in contact with the guided portion 291, and the movable element 31 and the driving head 27 are separated from each other. At this time, the spring 32 is in a compressed state, and the driving head 27 still receives the second rotational force of the image forming apparatus, the driving head 27 is driven to idle, and the photosensitive drum driving assembly 23 receives the first rotational force of the image forming apparatus and drives the photosensitive drum 22 to continue rotating. Due to the separation between the movable member 31 and the driving head 27, the developing roller 25 stops rotating, and simultaneously the developing roller 25 is separated from the photosensitive drum 22, so that the photosensitive drum driving assembly 23 drives the photosensitive drum 22 to rotate to realize surface cleaning of the photosensitive drum.

After the cleaning of sensitization drum 22 was accomplished, the development frame 24 of processing box 2 resets, drive end cover 28 also resets simultaneously, spring 32 forces to make moving part 31 be close to drive head 27 under its restoring force effect this moment, thereby make and connect the cooperation between moving part 31 and the drive head 27, it is rotatory to continue to drive developer roll 25, the realization supplies powder to sensitization drum 22, and then realize that imaging device continues to print work, effectively guarantee the carbon dust transfer between developer roll 25 and the sensitization drum 22, it is more even to make processing box 2 go out the powder, print the stable quality. Moreover, the processing box 2 has simple structure, and can effectively reduce the production cost and improve the production efficiency. Meanwhile, when the process cartridge 2 is placed in or taken out from the image forming apparatus, the resistance is small, and the mounting or taking-out operation is more convenient and labor-saving.

Above embodiment is the preferred example of the utility model, and not the restriction the utility model discloses the range of implementing, the event all according to the utility model discloses the equivalent change or the decoration that structure, characteristic and principle were done of application for patent scope all should be included in the utility model discloses the patent application scope.

Claims

1. A process cartridge detachably mountable to an image forming apparatus, said process cartridge including a drum frame, a developing frame, a photosensitive drum rotatably supported on said drum frame, and a developing roller rotatably supported on said developing frame, characterized in that:

the developing frame rotates relative to the drum frame between a contact position where the photosensitive drum is in contact with the developing roller and a spaced position where the photosensitive drum is spaced from the developing roller;

the processing box also comprises a developing roller driving component and a separating mechanism, wherein the developing roller driving component comprises a driving head, a transmission gear, a moving part, an elastic part, a driving end cover and a pushing and pressing part, one end of the developing roller is connected with a driving gear, and the driving gear is meshed with the transmission gear;

the movable piece is movably connected with the transmission gear along the axial direction of the transmission gear, one end of the movable piece is connected with the driving head, the elastic piece forces the movable piece to be close to the driving head, and the driving head is used for receiving the rotating force of the imaging device;

the driving end cover is arranged on the developing frame and is positioned on the same side of the processing box as the transmission gear, the driving end cover comprises a guiding part, and the pushing part comprises a guided part;

as the developing frame rotates from the contact position to the spaced position, the movable member is driven to move in the axial direction of the transmission gear by the cooperation of the guide portion and the guided portion, so that the movable member and the driving head are separated from each other.

2. A process cartridge according to claim 1, wherein:

the body of the pushing and pressing piece is of a circular ring structure, the end face of the circular ring structure, which is close to the driving end cover, is protruded to form the guided part, and the guided part extends towards the axis of the circular ring structure along the radial direction of the circular ring structure;

the movable part is followed the axial extension of transmission gear has the round platform, the one end of round platform can with the drive head is connected, ring structure clearance fit cup joints on the round platform, just contradict by the guide portion on an terminal surface of round platform.

3. A process cartridge according to claim 2, wherein:

the transmission gear is provided with an accommodating cavity with an opening at one axial end, and an input arm extending towards the radial center of the transmission gear is arranged on the inner wall of the accommodating cavity parallel to the axial direction of the transmission gear;

the movable piece is also provided with a guide rod, one end of the guide rod is connected with the other end of the circular truncated cone and extends along the axial direction of the transmission gear, and an output arm extending outwards along the transverse direction of the guide rod is arranged on the transverse outer wall of the guide rod;

the guide rod is located in the accommodating cavity, and the output arm and the input arm can be in abutting contact in the circumferential direction of the transmission gear.

4. A process cartridge according to claim 3, wherein:

the elastic piece is a spring, and the spring is pressed between the bottom of the accommodating cavity and the output arm.

5. A process cartridge according to claim 4, wherein:

the bottom of the accommodating cavity is convexly provided with a cylinder, the spring is sleeved on the cylinder, and the other end of the guide rod is in clearance fit with the hole of the cylinder.

6. A process cartridge according to claim 2, wherein:

the end face of the circular truncated cone is provided with a plurality of protrusions, the driving head is provided with a plurality of grooves, and the protrusions can be inserted into the grooves.

7. A process cartridge according to claim 1, wherein:

the process cartridge further includes a holding end cap mounted on an outer side of the driving end cap, and the driving head is rotatably supported on the holding end cap.

8. A process cartridge according to any one of claims 1 to 7, wherein:

the drive end cap includes two of the guide portions, and the urging member includes two of the guided portions, the two guide portions being located between the two guided portions, one of the guide portions cooperating with one of the guided portions.

9. A process cartridge according to claim 8, wherein:

the surfaces of the guiding part and the guided part which are in butt fit are inclined surfaces.

10. A process cartridge according to claim 9, wherein:

the two guided parts are respectively opposite to the inclination directions of the two inclined planes which are in butt fit with the two guiding parts.