Processing box

Abstract

The present invention provides a processing box, comprising a drum frame, a developing frame, a photosensitive drum, a developing roller, a developing roller driving assembly and a separation mechanism, wherein the developing frame rotates between a contact position and a spacing position relative to the drum frame, the developing roller driving assembly comprises a driving head, a transmission gear, a movable part, an elastic part, a driving end cover and a pushing part, the driving gear at one end of the developing roller is meshed with the transmission gear, the movable part can be connected to the transmission gear movably along the axial direction of the transmission gear, one end of the movable part can be connected to the driving head, the elastic part forces the movable part to approach the driving head, the driving end cover comprises a guiding part, the pushing part comprises a guided part, and as the developing frame rotates from the contact position to the spacing position, the movable part is driven to move along the axial direction of the transmission gear through the cooperation of the guiding part and the guided part, so that the movable part and the driving head are separated. The processing box has good working stability, simple structure, low production cost and high production efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of printing consumables, and in particular to a processing box which can be detachably installed on an imaging device. Background Art

[0002] An electrophotographic imaging device generally has an image processing unit and a developing unit. The electrostatic latent image formed on the image processing unit is developed using a developer such as toner provided by the developing unit to form a visible image on a medium such as paper. Toner is a consumable item that needs to be continuously replenished in the electrophotographic imaging device. Generally, a processing box with a certain amount of toner that can be detachably mounted to the developing unit in the electrophotographic imaging device is used to provide toner to the developing unit.

[0003] See also Figure 1 and Figure 2 There is a conventional process box 1 including a driving assembly, a developing roller 14, a stirring frame (not indicated), a powder feeding roller (not indicated) 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, and the second driving assembly 12 drives the developing roller 14, the stirring frame and the powder feeding roller to rotate. The second driving assembly 12 includes a clutch 121, a second driving head 122, a driving gear 123 and a spring 124. During the process of forming an image in the image forming device, 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 transmission head in the image forming device, thereby driving the photosensitive drum 13 to rotate, and the second driving head 122 receives the driving force of the second transmission head in the image forming device, thereby driving the developing roller 14, the stirring frame and the powder feeding roller to rotate. When the processing box 1 is printing in the imaging device, in order to improve the printing quality, the photosensitive drum 13 needs to be cleaned in the printing interval. Since the photosensitive drum 13 and the developing roller 14 are always in contact during printing, they are separated during the cleaning process. When the processing box 1 is in the state of cleaning the photosensitive drum 13, the clutch 121 disengages the second drive head 122 from the drive gear 123, and the second transmission head in the imaging device continues to drive the second drive head 122 to rotate. Since the drive gear 123 is separated from the second drive head 122, the drive gear 123 stops rotating, and the developing roller 14, the stirring frame and the powder feeding roller all stop rotating. At this time, the first transmission head in the imaging device continues to drive the first drive assembly 11 to rotate, thereby driving the photosensitive drum 13 to rotate, and the residual powder on the photosensitive drum 13 is cleaned.

[0004] Therefore, during the imaging and cleaning periods, the clutch 121 needs to switch back and forth between a connection position where the drive gear 123 is connected to the second drive head 122 and a disengagement position where the drive gear 123 is separated from the second drive head 122. If the clutch 121 is damaged during operation, the driving force cannot be transmitted to the developing roller 14, which will affect the normal use of the imaging device. In addition, the back and forth switching of the clutch 121 will reduce the working efficiency of the imaging device. If the clutch 121 does not move to the preset position during the switching process, it will affect the transmission of the driving force of the imaging device. In addition, the second drive assembly 12 has a complex structure and high assembly difficulty, which will increase costs and reduce the production efficiency of the processing box. Summary of the invention

[0005] In order to solve the above problems, the main purpose of the present invention is to provide a processing box with low production cost, high production efficiency and good working stability.

[0006] In order to achieve the above-mentioned main purpose, the present invention provides a processing box, which can be detachably installed on an imaging device. The processing box includes a drum frame, a developing frame, a photosensitive drum, a developing roller, a developing roller driving assembly and a separation mechanism. The photosensitive drum is rotatably supported on the drum frame, and the developing roller is rotatably supported on the developing frame. The developing frame rotates between a contact position and a spacing position relative to the drum frame. In the contact position, the photosensitive drum contacts the developing roller, and in the spacing position, the photosensitive drum is separated from the developing roller. The developing roller driving assembly includes a driving head, a transmission gear, a movable part, an elastic part, a driving end cover and a pushing part. One end is connected with a driving gear, and the driving gear and the transfer gear are meshed with each other. The movable part can be connected to the transfer gear movably along the axial direction of the transfer gear. One end of the movable part can be connected to the driving head. The elastic part forces the movable part to be close to the driving head. The driving head is used to receive the rotational force of the imaging device. The driving end cover is installed on the developing frame and is located on the same side of the processing box as the transfer gear. The driving end cover includes a guiding part, and the pushing part includes a guided part. As the developing frame rotates from the contact position to the spacing position, the movable part is driven to move along the axial direction of the transfer gear through the cooperation of the guiding part and the guided part, so that the movable part and the driving head are separated.

[0007] It can be seen from the above scheme that the driving gear and the transmission gear are meshed with each other, the movable part can be connected to the transmission gear along the axial direction of the transmission gear, one end of the movable part can be connected to the driving head, the elastic part forces the movable part to be close to the driving head, the driving head is used to receive the rotational force of the imaging device, the driving end cover is installed on the developing frame and is located on the same side of the processing box as the transmission gear, the driving end cover includes a guiding part, and the pushing part includes a guided part. As the developing frame rotates from the contact position to the spacing position, the driving movable part is driven to move along the axial direction of the transmission gear through the cooperation of the guiding part and the guided part, so that the movable part and the driving head are separated, so as to clean the surface of the photosensitive drum, and the working stability is good. Moreover, the structure of the processing box is simple, which can effectively reduce production costs and improve production efficiency. At the same time, when the processing box is placed in the imaging device or taken out from the imaging device, the resistance is small, and the installation or removal operation is more convenient and labor-saving.

[0008] A further solution is that the main body of the push member is a circular ring structure, and a bulge on the end face of the circular ring structure close to the driving end cover forms a guided portion, and the guided portion extends radially along the circular ring structure toward the axis of the circular ring structure, and the movable part has a cone extending along the axial direction of the transmission gear, one end of the cone can be connected to the driving head, the circular ring structure is sleeved on the cone with a clearance fit, and the guided portion abuts against one end face of the cone.

[0009] A further solution is that the transmission gear is provided with an accommodating cavity which is open at one axial end thereof, and an input arm extending toward the radial center of the transmission gear is provided on the inner wall of the accommodating cavity which is parallel to the axial direction of the transmission gear, and the movable part is also provided with a guide rod, one end of the guide rod is connected to the other end of the cone and extends along the axial direction of the transmission gear, and an output arm extending outward along the lateral direction of the guide rod is provided on the lateral outer wall of the guide rod, and the guide rod is located in the accommodating cavity, and in the circumferential direction of the transmission gear, the output arm can form abutting contact with the input arm.

[0010] A further solution is that the elastic member is a spring, and the spring is pressed between the bottom of the accommodating cavity and the output arm.

[0011] A further solution is that a cylindrical body is convexly arranged at the bottom of the accommodating cavity, the spring is sleeved on the cylindrical body, and the other end of the guide rod is gap-matched with the hole of the cylindrical body.

[0012] A further solution is that a plurality of protrusions are arranged on one end surface of the truncated cone, and a plurality of grooves are provided on the driving head, and the protrusions can be inserted into the grooves.

[0013] A further solution is that the processing box also includes a retaining end cover, which is installed on the outside of the driving end cover, and the driving head is rotatably supported on the retaining end cover.

[0014] A further solution is that the driving end cover includes two guiding parts, the pushing member includes two guided parts, the two guiding parts are located between the two guided parts, and one guiding part cooperates with one guided part.

[0015] A further solution is that the surfaces of the guiding part and the guided part that are in contact with each other are both inclined surfaces.

[0016] A further solution is that the inclination directions of the two inclined surfaces of the two guided parts respectively abutting against the two guiding parts are opposite. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural diagram of an existing process box.

[0018] Figure 2 It is a partial exploded view of an existing process cartridge.

[0019] Figure 3 It is a structural diagram of an embodiment of a processing box of the present invention.

[0020] Figure 4 It is a first partial structural diagram of a processing box embodiment of the present invention.

[0021] Figure 5 It is a second partial structural diagram of the processing box embodiment of the present invention.

[0022] Figure 6 1 is a structural diagram of a drive end cover in an embodiment of a processing box of the present invention.

[0023] Figure 7 It is a partial structural diagram of the developing roller drive assembly in the processing box embodiment of the present invention.

[0024] Figure 8 It is a partial exploded view of the developer roller drive assembly in the process cartridge embodiment of the present invention.

[0025] Fig. 9 1 is a structural diagram of a transmission gear in an embodiment of a processing box of the present invention.

[0026] Fig.10 It is a structural diagram of the drive head in the processing box embodiment of the present invention.

[0027] Fig.11 1 is a structural diagram of a push member in an embodiment of a process cartridge of the present invention.

[0028] Fig.12 It is a partial cross-sectional view of the developing roller drive assembly in the process cartridge embodiment of the present invention.

[0029] The present invention is further described below in conjunction with the accompanying drawings and embodiments. DETAILED DESCRIPTION

[0030] See also Figures 3 to 5 The process cartridge 2 is detachably mounted to the imaging device. The process cartridge 2 includes a drum frame 21, a developing frame 24, a photosensitive drum 22, a developing roller 25, a retaining end cap 26, a photosensitive drum driving assembly 23, a developing roller driving assembly and a separation 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. The photosensitive drum driving assembly 23 is used to receive the first rotational force of the imaging device and drive the photosensitive drum 22 to rotate. The developing frame 24 rotates between a contact position and a spacing position relative to the drum frame 21. In the contact position, the photosensitive drum 22 is in contact with the developing roller 25. In the spacing position, the photosensitive drum 22 is separated from the developing roller 25.

[0031] See also Figures 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 cover 28 and a pushing member 29, and one end of the developing roller 25 is connected to a driving gear 251, and the driving gear 251 is meshed with the transmission gear 30. The movable member 31 can be connected to the transmission gear 30 axially and movably, and one end of the movable member 31 can be connected to the driving head 27, and the elastic member 32 forces the movable member 31 to approach the driving head 27, and the driving head 27 is used to receive the second rotational force of the imaging device. The driving end cover 28 is mounted on the developing frame 24 and is located on the same side of the processing box 2 as the transmission gear 30. The driving end cover 28 includes a guiding portion 281, and the pushing member 29 includes a guided portion 291. As the developing frame 24 rotates from the contact position to the spacing position, the movable member 31 is driven to move along the axial direction of the transmission gear 30 through the cooperation of the guiding portion 281 and the guided portion 291, so that the movable member 31 and the driving head 27 are separated.

[0032] See also Fig. 9 The transmission gear 30 is provided with an accommodation cavity 301 which is open at one axial end thereof. Two input arms 302 extending toward the radial center of the transmission gear 30 are provided on the inner wall of the accommodation cavity 301 parallel to the axial direction of the transmission gear 30. The two input arms 302 are symmetrically arranged about the axis of the transmission gear 30. A cylindrical body 303 is convexly arranged at the bottom of the accommodation cavity 301. The elastic member 32 is a spring, and the spring 32 is sleeved on the cylindrical body 303.

[0033] See also Figure 8The movable member 31 is located in the accommodating chamber 301. The movable member 31 has a truncated cone 311 extending along the axial direction of the transmission gear 30. Four protrusions 312 are arranged on one end surface of the truncated cone 311. The four protrusions 312 are evenly distributed around the axis of the truncated cone 311. The movable member 31 is also provided with a guide rod 313. One end of the guide rod 313 is connected with the other end of the truncated cone 311 and extends along the axial direction of the transmission gear 30. The other end of the guide rod 313 is matched with the hole clearance of the cylindrical body 303 in the accommodating chamber 301. Two output arms 314 extending outward along the lateral direction of the guide rod 313 are arranged on the lateral outer wall of the guide rod 313. The two output arms 314 are symmetrically arranged about the axis of the guide rod 313. In the circumferential direction of the transmission gear 30, the two input arms 302 and the two output arms 314 are arranged alternately. Moreover, in the circumferential direction of the transmission gear 30, the two output arms 314 can form abutment contact with the two input arms 302 respectively. The spring 32 is pressed between the bottom of the accommodating cavity 301 and the output arm 314 .

[0034] See also Fig.10 The driving head 27 sequentially extends the driving force receiving portion 271 and the disc 272 connected to each other along the axial direction of the transmission gear 30. The disc 272 is provided with four grooves 273. The four grooves 273 are all set through the disc 272, and the four grooves 273 are evenly distributed around the axis of the disc 272. The four protrusions 312 on the truncated table 311 can be respectively inserted into the four grooves 273. The retaining end cover 26 is installed on the outer side of the driving end cover 28, and the driving force receiving portion 271 of the driving head 27 is rotatably supported on the retaining end cover 26.

[0035] See also Fig.11 The body of the push member 29 is a circular ring structure, which is sleeved on the truncated cone 311 of the movable member 31 with clearance fit. The end surface of the circular ring structure close to the driving end cover 28 is raised to form two guided portions 291, and the two guided portions 291 are symmetrically arranged about the axis of the circular ring structure. Moreover, the two guided portions 291 extend radially toward the axis of the circular ring structure respectively, and both guided portions 291 abut against one end surface of the truncated cone 311.

[0036] See also Figures 6 to 12, the developing frame 24 is provided with a force-bearing portion 241, and the force-bearing portion 241 can receive the force of the imaging device to rotate the developing frame 24 from the contact position to the spacing position. The driving end cover 28 includes two guiding portions 281, and the two guiding portions 281 are located between the two guided portions 291, and one guiding portion 281 cooperates with one guided portion 291. The surfaces of the guiding portion 281 and the guided portion 291 that are in conflict with each other are both inclined surfaces 282 and 292, and the inclination directions of the two inclined surfaces 292 that are in conflict with the two guided portions 291 are opposite. As the developing frame 24 rotates from the contact position to the spacing position, the two guiding portions 281 on the driving end cover 28 also rotate, so that the two guiding portions 281 respectively conflict with the two guided portions 291, and the movable member 31 is driven to move along the axial direction of the transmission gear 30 so that the movable member 31 and the driving head 27 are separated.

[0037] After the processing box 2 is installed in the imaging device, in the normal printing state of the imaging device, the force-bearing part 241 of the developing frame 24 does not receive the force of the imaging device, the developing frame 24 is in the contact position relative to the drum frame 21, the developing roller 25 is in contact with the photosensitive drum 22, the movable part 31 and the driving head 27 are connected and matched, and the driving head 27 receives the second rotational force of the imaging device to drive the transmission gear 30 to rotate. 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 at the same time, the photosensitive drum driving assembly 23 receives the first rotational force of the imaging device and drives the photosensitive drum 22 to rotate. During the printing process of the processing box 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 the toner is stably transferred from the developing roller 25 to the photosensitive drum 22, and then a series of laser printing such as exposure, development, and transfer is realized on the printing paper.

[0038] When the imaging device needs to clean the photosensitive drum 22, the cleaning unit of the imaging device applies a force to the force-bearing portion 241 of the developing frame 24. As the force-bearing portion 241 receives the force of the imaging device, the developing frame 24 is driven to rotate from the contact position to the spacing 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 spacing position, the guide portion 281 on the driving end cover 28 also rotates, so that the guide portion 281 and the guided portion 291 are in contact with each other, and the movable member 31 is driven to move along the axial direction of the transmission gear 30, so that the movable member 31 and the driving head 27 are separated. At this time, the spring 32 is in a compressed state, and the driving head 27 still receives the second rotational force of the imaging device, driving the driving head 27 to idle, and at the same time, the photosensitive drum driving assembly 23 receives the first rotational force of the imaging device 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 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 and clean its surface.

[0039] After the photosensitive drum 22 is cleaned, the developing frame 24 of the processing box 2 is reset, and the driving end cover 28 is also reset. At this time, the spring 32 forces the movable part 31 to approach the driving head 27 under the action of its restoring force, so that the movable part 31 and the driving head 27 are connected and matched, and the developing roller 25 is continued to rotate to supply powder to the photosensitive drum 22, so that the imaging device continues to print, effectively ensuring the transfer of carbon powder between the developing roller 25 and the photosensitive drum 22, so that the processing box 2 can discharge powder more evenly and the printing quality is stable. In addition, the structure of the processing box 2 is simple, which can effectively reduce production costs and improve production efficiency. At the same time, when the processing box 2 is placed in the imaging device or taken out from the imaging device, the resistance is small, and the installation or removal operation is more convenient and labor-saving.

[0040] The above embodiments are only preferred examples of the present invention and are not intended to limit the scope of implementation of the present invention. Therefore, any equivalent changes or modifications made according to the structure, characteristics and principles of the patent application scope of the present invention should be included in the scope of the patent application of the present invention.

Claims

1. A process cartridge, wherein the process cartridge is detachably mounted to an imaging device, wherein the process cartridge comprises a drum frame, a developing frame, a photosensitive drum and a developing roller, wherein the photosensitive drum is rotatably supported on the drum frame, and the developing roller is rotatably supported on the developing frame, wherein: The developing frame rotates relative to the drum frame between a contact position and a spacing position, wherein the photosensitive drum contacts the developing roller at the contact position and the photosensitive drum is separated from the developing roller at the spacing position; The processing box also includes a developing roller driving assembly, which includes a driving head, a transmission gear, a movable member, an elastic member, a driving end cover and a pushing member, one end of the developing roller is connected to a driving gear, and the driving gear and the transmission gear are meshed with each other; The movable member is connected to the transmission gear movably along the axial direction of the transmission gear, one end of the movable member is connected to the driving head, the elastic member forces the movable member to approach the driving head, and the driving head is used to receive the rotational force of the imaging device; The driving end cover is mounted on the developing frame and is located on the same side of the process cartridge as the transmission gear, the driving end cover includes a guiding portion, and the pushing member includes a guided portion; As the developing frame rotates from the contact position to the spacing position, the guiding portion cooperates with the guided portion to drive the movable member to move along the axial direction of the transmission gear so that the movable member and the driving head are separated; The body of the push member is a circular ring structure, and a protrusion on the end surface of the circular ring structure close to the driving end cover forms the guided portion, and the guided portion extends radially along the circular ring structure toward the axis of the circular ring structure; The movable member is provided with a truncated cone extending along the axial direction of the transmission gear, one end of the truncated cone can be connected to the driving head, the annular structure is sleeved on the truncated cone with clearance fit, and the guided portion abuts against one end surface of the truncated cone; A plurality of protrusions are arranged on one end surface of the truncated cone, and a plurality of grooves are formed on the driving head, into which the protrusions can be inserted.

2. The process cartridge according to claim 1, wherein: The transmission gear is provided with a receiving cavity which is open at one axial end thereof, and an input arm extending toward the radial center of the transmission gear is provided on the inner wall of the receiving cavity which is parallel to the axial direction of the transmission gear; The movable member is further provided with a guide rod, one end of which is connected to the other end of the truncated table and extends along the axial direction of the transmission gear, and an output arm extending outward along the lateral direction of the guide rod is provided on the lateral outer wall of the guide rod; The guide rod is located in the accommodating cavity, and the output arm can form an abutting contact with the input arm in the circumferential direction of the transmission gear.

3. The process cartridge according to claim 2, wherein: The elastic member is a spring, and the spring is pressed between the bottom of the accommodating cavity and the output arm.

4. The process cartridge according to claim 3, wherein: A cylindrical body is convexly arranged at the bottom of the accommodating cavity, the spring is sleeved on the cylindrical body, and the other end of the guide rod is gap-matched with the hole of the cylindrical body.

5. The process cartridge according to claim 1, wherein: The processing box also includes a retaining end cover, which is installed on the outer side of the driving end cover, and the driving head is rotatably supported on the retaining end cover.

6. The process cartridge according to any one of claims 1 to 5, characterized in that: The driving end cover includes two guiding parts, the pushing member includes two guided parts, the two guiding parts are located between the two guided parts, and one guiding part cooperates with one guided part.

7. The process cartridge according to claim 6, wherein: The surfaces of the guiding portion and the guided portion that are in contact with each other are both inclined surfaces.

8. The process cartridge according to claim 7, wherein: The inclination directions of the two inclined surfaces that respectively abut against the two guiding parts of the two guided parts are opposite to each other.

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