Processing box

Abstract

The utility model discloses a processing box. The processing box comprises a photosensitive unit, a developing unit, a force transmission component and a clutch mechanism, the photosensitive unit includes a drum frame, a photosensitive drum, and a driving force receiving member. The developing unit comprises a developing frame and a developing roller, and the developing frame is movably connected with the drum frame in a matched manner; a force transmission component is arranged on the developing frame, is connected with the driving force receiving component through a transmission mechanism, and is used for transmitting the driving force received by the driving force receiving component to the developing unit; the clutch mechanism is used for keeping power of the transmission mechanism to be transmitted to the force transmission component when the developing roller is in contact with the photosensitive drum and cutting off power transmission to the force transmission component when the photosensitive drum is separated from the developing roller; according to the utility model, the driving force of the developing unit is cut off through the clutch mechanism when the photosensitive drum is separated from the developing roller, so that on one hand, the environmental problem caused by carbon powder flying out in the separation and cleaning process can be effectively avoided, and on the other hand, energy conservation is facilitated.

Description

Technical Field

[0001] The utility model relates to the field of electronic photographic imaging equipment, in particular to a processing box. Background Art

[0002] In the prior art, there is a processing box in which a driving force receiving member is only provided on the photosensitive unit. This processing box transmits the driving force received by the photosensitive unit to the developing unit through a gear mechanism, and during the process of separation and contact between the photosensitive unit and the developing unit, the photosensitive unit always keeps transmitting the driving force to the developing unit.

[0003] In the above-mentioned prior art processing box, during the drum roller separation and cleaning process, the rotating parts in the developing unit still keep rotating, which is not conducive to power saving; in addition, during this process, the toner on the developing roller will float out, which has the defect of polluting the environment. Utility Model Content

[0004] In view of the defects of the prior art, the main purpose of the utility model is to provide a processing box which can cut off the driving force of the developing unit when the photosensitive drum and the developing roller are separated.

[0005] In order to achieve the above-mentioned main purpose, the utility model provides a processing box, comprising: a photosensitive unit, including a drum frame, a photosensitive drum and a driving force receiving member; the photosensitive drum is rotatably mounted on the drum frame, and the driving force receiving member is used to receive a rotational driving force from an electronic photographic imaging device to rotate the photosensitive drum; a developing unit, including a developing frame and a developing roller; the developing roller is rotatably mounted on the developing frame and arranged facing the photosensitive drum; the developing frame and the drum frame are movably matched and connected, and can be switched between a first position where the developing roller contacts the photosensitive drum and a second position where the developing roller is away from the photosensitive drum; wherein a force transmission member is provided on the developing frame, and the force transmission member is connected to the driving force receiving member through a transmission mechanism, and is used to transmit the driving force received by the driving force receiving member to the developing unit; the processing box also includes: a clutch mechanism, which is used to keep the power of the transmission mechanism transmitted to the force transmission member when the developing roller contacts the photosensitive drum and to cut off the power transmission to the force transmission member when the photosensitive drum is separated from the developing roller.

[0006] In the above technical solution of the utility model, the clutch mechanism is used to cut off the driving force of the developing unit when the photosensitive drum and the developing roller are separated. On the one hand, it can effectively avoid the environmental problems caused by the carbon powder flying out during the separation and cleaning process, and on the other hand, it is conducive to saving energy.

[0007] Furthermore, the transmission mechanism is a gear mechanism, which includes at least one transmission gear, and the clutch mechanism connects the force transmission component and the transmission gear respectively; the clutch mechanism includes a movable gear, the movable gear is meshed with the force transmission component, and can move between a third position close to the transmission gear and a fourth position away from the transmission gear.

[0008] Furthermore, the clutch mechanism comprises a clutch member, the movable gear and the transmission gear are coaxially arranged, and the clutch member is located between the movable gear and the transmission gear.

[0009] Further, the movable gear is located on the axial inner side of the transmission gear and is provided with a coupling portion on the end face close to the transmission gear; the clutch is installed on the transmission gear, and when the movable gear is in the third position, the coupling portion is engaged with the clutch; when the movable gear is in the fourth position, the coupling portion and the clutch are separated from each other.

[0010] Furthermore, a guide portion is provided on the developing frame or the drum frame, and the movable gear can move along the guide portion; when the developing unit is switched from the first position to the second position relative to the photosensitive unit, the movable gear moves along the guide portion and separates the movable gear from the force transmission member, and when the developing unit is switched from the second position to the first position relative to the photosensitive unit, the movable gear moves along the guide portion and engages with the force transmission member.

[0011] Further, the developing frame can drive the movable gear to move from the third position to the fourth position during the process of switching from the first position to the second position.

[0012] Furthermore, a separation force receiving portion is provided on the developing frame, and the separation force receiving portion is used to receive a separation force from the electronic photographic imaging device to rotate the developing frame relative to the drum frame, so as to drive the developing frame to switch from a first position to a second position; the rotation axis of the force transmitting member and the rotation axis of the developing frame relative to the drum frame coincide with each other.

[0013] Furthermore, a mounting portion is provided on the developing frame, a connecting piece is provided on the end surface of the movable gear away from the transmission gear, and the movable gear is arranged on the mounting portion through the connecting piece and can move relative to the mounting portion; a pressing portion is provided on the drum frame, and the connecting piece is provided with a matching portion corresponding to the pressing portion, and the pressing portion can abut against the matching portion and drive the connecting piece to move.

[0014] In the above technical solution of the utility model, the connecting member is driven to move by the abutment cooperation between the pressing part on the drum frame and the matching part on the connecting member, thereby driving the movable gear connected to the connecting member to move, thereby realizing the movement interlocking between the developing frame switching from the first position to the second position and the movable gear moving from the third position to the fourth position, which has the advantages of ingenious design and compact structure.

[0015] Furthermore, the matching portion is in a conical shape, and the pressing portion is in a convex block shape that matches the matching portion.

[0016] Furthermore, the mounting portion is provided with an elastic member, and during the process of the developing frame switching from the first position to the second position, the movable gear moves from the third position to the fourth position and simultaneously squeezes the elastic member, and when the developing frame switches from the second position to the first position, under the action of the restoring force of the elastic member, the movable gear moves from the fourth position to the third position, and the movable gear engages with the transmission gear.

[0017] In order to more clearly illustrate the purpose, technical solutions and advantages of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural diagram of an embodiment of a processing box of the utility model;

[0019] Figure 2 It is a first exploded view of the driving side of the process cartridge embodiment of the utility model;

[0020] Figure 3 is a second exploded view of the drive side of the process cartridge embodiment of the utility model;

[0021] Figure 4 It is a structural diagram of movable gears and connecting parts;

[0022] Figure 5 It is the structural diagram of the clutch mechanism;

[0023] Figure 6 is a schematic diagram showing the movable gear in a third position close to the transmission gear;

[0024] Figure 7 is a schematic diagram showing that the movable gear is in a fourth position away from the transmission gear. DETAILED DESCRIPTION

[0025] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0026] like Figure 1 As shown, the process box of the embodiment of the utility model comprises a photosensitive unit 10 and a developing unit 20, and the photosensitive unit 10 and the developing unit 20 are movably connected together through a first end cover 30 and a second end cover 40. The first end cover 30 and the second end cover 40 are arranged opposite to each other in the length direction of the process box, the first end cover 30 is located on the driving side of the process box, and the second end cover 40 is located on the non-driving side of the process box.

[0027] The photosensitive unit 10 includes a drum frame 11, a photosensitive drum 12, and a driving force receiving member 13; the photosensitive drum 12 is rotatably mounted on the drum frame 11, and the driving force receiving member 13 is exposed from the first end cover 30, and is used to receive a rotational driving force from the electrophotographic imaging device to rotate the photosensitive drum 12. The driving force receiving member 13 can be connected to the end of the photosensitive drum 12 and have the same rotation axis as the photosensitive drum 12. In this embodiment, the first end cover 30 and the second end cover 40 can be assembled and connected to the drum frame 11, for example, fixed to the drum frame 11 by screws; in an optional embodiment, the second end cover 40 can also be integrally formed with the drum frame 11 and can be regarded as a part of the drum frame 11.

[0028] The developing unit 20 includes a developing frame 21 and a developing roller 22; the developing roller 22 is rotatably mounted on the developing frame 21 and disposed facing the photosensitive drum 12, and is used to supply developer to the photosensitive drum 12 during the imaging process. The developing frame 21 is rotatably connected to the drum frame 11, and the developing frame 21 can be switched between a first position where the developing roller 22 contacts the photosensitive drum 12 and a second position where the developing roller 22 is away from the photosensitive drum 12.

[0029] A force transmission member 23 is provided on the developing frame 21, and the force transmission member 23 is connected to the driving force receiving member 13 through a transmission mechanism 50, and is used for transmitting the driving force received by the driving force receiving member 13 to the developing unit 20; wherein, the driving force receiving member 13 transmits the driving force to the force transmission member 23 through the transmission mechanism 50, and drives the rotating parts (including the developing roller 22) in the developing unit 20 to rotate through the force transmission member 23; in the present embodiment, the force transmission member 23 is connected to each rotating part of the developing unit 20 through a gear mechanism 60 to realize the rotation of each rotating part.

[0030] Preferably, the rotation axis of the force transfer member 23 coincides with the rotation axis of the developing frame 21 relative to the drum frame 11; in other embodiments, the rotation axis of the force transfer member 23 may also be set at other positions, which will not be elaborated here.

[0031] In this embodiment, the developing frame 21 has two side walls 211 arranged opposite to each other along the length direction of the process box, and the two side walls 211 are respectively connected to the first end cover 30 and the second end cover 40 in a rotational fit. A separation force receiving portion 24 is provided on the developing frame 21, and the separation force receiving portion 24 is used to receive a separation force from the electronic photographic imaging device to rotate the developing frame 21 relative to the drum frame 11, so as to drive the developing frame 21 to switch from the first position to the second position; preferably, after the separation force received by the separation force receiving portion 24 disappears, the developing frame 21 can preferably switch from the second position to the first position, for example, the developing frame 21 can automatically switch from the second position to the first position through a structure such as an elastic member, which will not be expanded here.

[0032] like Figure 2-3 As shown, the processing box is provided with a clutch mechanism 70, which is used to keep the power of the transmission mechanism 50 being transmitted to the force transmission member 23 when the developing roller 22 contacts the photosensitive drum 12 and to cut off the power transmission of the transmission mechanism 50 to the force transmission member 23 when the photosensitive drum 12 is separated from the developing roller 22. That is, it is used to provide driving force to the developing unit 20 through the photosensitive unit 10 when the developing roller 22 contacts the photosensitive drum 12 to keep the rotation of the rotating parts in the developing unit 20 and to cut off the driving force of the developing unit 20 when the photosensitive drum 12 is separated from the developing roller 22.

[0033] The transmission mechanism 50 is specifically a gear transmission mechanism, which includes at least one transmission gear 51; the transmission mechanism 50 in this embodiment includes one transmission gear 51, and in other embodiments, the number of transmission gears 51 can be set as needed, for example, two or three transmission gears 51 are set, and the number of transmission gears 51 is not limited here.

[0034] The driving force receiving member 13 transmits power to the force transmitting member 23 through the transmission gear 51; Figure 2 The clutch mechanism 70 is respectively connected to the transmission gear 51 and the force transmission component 23, and can maintain or cut off the driving force transmitted to the force transmission component 23 through the transmission gear 51; it should be noted here that the clutch mechanism 70 can also be arranged at other suitable positions of the transmission mechanism 50. For example, in an optional embodiment, the clutch mechanism 70 can also be arranged between the driving force receiving component 13 and the transmission gear 51. For example, in another optional embodiment, when the transmission mechanism 50 has a structure with multiple transmission gears 51, the clutch mechanism 70 can also be arranged between adjacent transmission gears 51, which will not be elaborated one by one here.

[0035] Please continue reading Figure 3 The clutch mechanism 70 includes a movable gear 71 and a clutch member 72; the movable gear 71 is coaxially arranged with the transmission gear 51 and is located on the axial inner side of the transmission gear 51, and the clutch member 72 is installed on the transmission gear 51 and is located between the movable gear 71 and the transmission gear 51; wherein, the movable gear 71 is meshed with the force transmission member 23 and can move between a third position close to the transmission gear 51 and a fourth position away from the transmission gear 51; preferably, the movable gear 71 always remains meshed with the force transmission member 23 during the movement between the third position close to the transmission gear 51 and the fourth position away from the transmission gear 51.

[0036] like Figure 4 As shown, the end surface of the movable gear 71 close to the transmission gear 51 is provided with a coupling portion 73 , and the movable gear 71 can be coupled with the clutch member 72 through the coupling portion 73 to transmit the driving force.

[0037] like Figure 5-6 As shown, when the movable gear 71 is in the third position, the engaging portion 73 of the movable gear 71 engages with the clutch member 72, so that the movable gear 71 engages with the transmission gear 51 and receives the driving force of the transmission gear 51, and then transmits the driving force to the force transmission member 23 through the movable gear 71; Figure 7 As shown, when the movable gear 71 is in the fourth position, the engaging portion 73 and the clutch member 72 of the movable gear 71 are separated from each other. At this time, the driving force of the transmission gear 51 cannot be transmitted to the movable gear 71, thereby disconnecting the driving force of the force transmission component 23.

[0038] In this embodiment, the process of the movable gear 71 moving from the third position to the fourth position can be carried out synchronously with the process of the developing frame 21 switching from the first position to the second position; preferably, the movable gear 71 can be driven to move from the third position to the fourth position during the process of the developing frame 21 switching from the first position to the second position.

[0039] Please refer again Figure 2-4 The developing frame 21 is provided with a mounting portion 25, and a connecting member 74 is provided on the end surface of the movable gear 71 away from the transmission gear 51. The movable gear 71 is arranged on the mounting portion 25 through the connecting member 74 and can move longitudinally (in the length direction of the process cartridge) relative to the mounting portion 25. Specifically, the connecting member 74 and the movable gear 71 are prefabricated as one piece.

[0040] Further, the drum frame 11 is provided with a pressing portion 14, and the connecting member 74 is provided with a matching portion 75 corresponding to the pressing portion 14, and the pressing portion 14 can abut against the matching portion 75 and drive the connecting member 74 to move; wherein, during the process of the developing frame 21 switching from the first position to the second position, the pressing portion 14 can continuously abut against the matching portion 75 to drive the connecting member 74 to move. In this embodiment, the matching portion 75 is preferably in a conical shape, and the pressing portion 14 is preferably in a convex block shape that matches the conical matching portion 75. During the process of the developing frame 21 switching from the first position to the second position, the pressing portion 14 abuts against the matching portion 75 and provides a force along the length direction of the connecting member 74 to drive the connecting member 74 to move, thereby driving the movable gear 71 to move from the third position to the fourth position, and realizing the driving force of the disconnecting force transmission member 23.

[0041] An elastic member 26 may also be provided on the mounting portion 25. When the developing frame 21 switches from the first position to the second position, the pressing portion 14 abuts against the matching portion 75 and drives the connecting member 74 to move, wherein the connecting member 74 can squeeze the elastic member 26 while driving the movable gear 71 to move from the third position to the fourth position; when the developing frame 21 switches from the second position to the first position, under the action of the restoring force of the elastic member 26, the connecting member 74 automatically returns to its original position, driving the movable gear 71 to move from the fourth position to the third position, thereby achieving engagement between the movable gear 71 and the transmission gear 51 to receive the driving force of the transmission gear 51, and transmitting the driving force received by the movable gear 71 to the force transmitting member 23, thereby restoring the driving force provided to the developing unit 20 through the photosensitive unit 10.

[0042] like Figure 2-3 As shown, the mounting portion 25 is preferably a tubular structure arranged along the axial direction of the movable gear 71, the elastic member 26 is specifically a spring arranged in the mounting portion 25, and the connecting member 74 is columnar, which can extend into the interior of the mounting portion 25 and can compress the elastic member 26; wherein, a notch 251 is provided at the side position of the mounting portion 25 facing the pressing portion 14, and the pressing portion 14 extends into the mounting portion 25 through the notch 251 and forms an abutment fit with the matching portion 75; in order to simplify the structure, the connecting member 74 is provided with a matching groove 741 which is recessed inwardly along its circumference, and the matching portion 75 is arranged in the matching groove 741 and can form an abutment fit with the pressing portion 14.

[0043] In some embodiments, the position of the movable gear 71 can be changed to separate the movable gear 71 from the force transfer member 23, thereby cutting off the driving force of the developing unit 20; for example, a guide portion is provided on the developing frame 21 or the drum frame 11, and the guide portion is preferably provided with a guide track groove; specifically, in the process of the developing unit 20 switching from the first position to the second position relative to the photosensitive unit 10, the movable gear 71 can move along the guide portion and separate the movable gear 71 from the force transfer member 23, and in the process of the developing unit 20 switching from the second position to the first position relative to the photosensitive unit 10, the movable gear 71 can also move along the guide portion and engage the movable gear 71 with the force transfer member 23.

[0044] In some embodiments, a connecting component can be provided between the movable gear 71 and the force transmission member 23. The connecting component can move axially and can continuously maintain meshing with the movable gear 71. The connecting component and the force transmission member 23 can be meshed in a disengageable manner, and the driving force transmitted to the force transmission member 23 can be maintained or cut off by changing the position of the connecting component. The disengageable meshing structure between the connecting component and the force transmission member 23 can refer to the structural form of the aforementioned clutch mechanism, and other clutch structures can also be used, which will not be expanded here. It should be noted that the movable gear 71 in the above structure can be movable relative to the force transmission member 23, or it can be fixed relative to the force transmission member 23, as long as the driving force of the movable gear 71 can be transmitted to the force transmission member 23 via the connecting component.

[0045] The processing box in this embodiment receives the rotational driving force from the electronic photographic imaging device through the driving force receiving member 13, and transmits the rotational driving force to the force transmitting member 23 through the transmission mechanism 50 to drive the rotating parts of the developing unit 20 to rotate; at the same time, the clutch mechanism 70 maintains the power transmission of the transmission mechanism 50 when the developing roller 22 contacts the photosensitive drum 12, and cuts off the power transmission of the transmission mechanism 50 when the photosensitive drum 12 and the developing roller 22 are separated, so that the rotating parts in the developing unit 20 stop rotating during the separation and cleaning process of the photosensitive drum 12 and the developing roller 22. On the one hand, it can effectively avoid the environmental problems caused by the carbon powder floating out during the separation and cleaning process, and on the other hand, it is conducive to saving energy.

[0046] Although the present invention is disclosed as above with specific embodiments, these specific embodiments are not intended to limit the scope of implementation of the present invention. Any person skilled in the art may make some changes / modifications without departing from the scope of the invention of the present invention, that is, any equivalent changes / modifications made in accordance with the present invention shall be covered by the protection scope of the present invention.

Claims

1. A process box having: A photosensitive unit comprising a drum frame, a photosensitive drum and a driving force receiving member; the photosensitive drum is rotatably mounted on the drum frame, and the driving force receiving member is used to receive a rotational driving force from an electrophotographic image forming apparatus to rotate the photosensitive drum; A developing unit, comprising a developing frame and a developing roller; The developing roller is rotatably mounted on the developing frame and arranged facing the photosensitive drum; the developing frame is movably connected to the drum frame and can be switched between a first position where the developing roller contacts the photosensitive drum and a second position where the developing roller is away from the photosensitive drum; wherein a force transmission member is provided on the developing frame, and the force transmission member is connected to the driving force receiving member through a transmission mechanism, and is used to transmit the driving force received by the driving force receiving member to the developing unit; Characterized in that the processing box also includes: The clutch mechanism is used to keep the power of the transmission mechanism transmitted to the force transmission member when the developing roller contacts the photosensitive drum, and to cut off the power transmission to the force transmission member when the photosensitive drum is separated from the developing roller.

2. The process cartridge according to claim 1, wherein: The transmission mechanism is a gear mechanism, which includes at least one transmission gear, and the clutch mechanism connects the force transmission component and the transmission gear respectively; the clutch mechanism includes a movable gear, and the movable gear can engage with the force transmission component and can move between a third position close to the transmission gear and a fourth position away from the transmission gear.

3. The process cartridge according to claim 2, wherein: The clutch mechanism further comprises a clutch member, the movable gear and the transmission gear are coaxially arranged, and the clutch member is located between the movable gear and the transmission gear.

4. The process cartridge according to claim 3, wherein: The movable gear is located on the axial inner side of the transmission gear and is provided with an engaging portion on the end face close to the transmission gear; the clutch member is installed on the transmission gear, and when the movable gear is in the third position, the engaging portion is engaged with the clutch member; when the movable gear is in the fourth position, the engaging portion and the clutch member are separated from each other.

5. The process cartridge according to claim 2, wherein: A guide portion is provided on the developing frame or the drum frame, and the movable gear can move along the guide portion; when the developing unit is switched from the first position to the second position relative to the photosensitive unit, the movable gear moves along the guide portion and separates the movable gear from the force transmission member, and when the developing unit is switched from the second position to the first position relative to the photosensitive unit, the movable gear moves along the guide portion and engages with the force transmission member.

6. A process cartridge according to any one of claims 2 to 5, characterized in that: The developing frame may drive the movable gear to move from the third position to the fourth position during the switching process from the first position to the second position.

7. A process cartridge according to claim 6, characterized in that: A separation force receiving portion is provided on the developing frame, and the separation force receiving portion is used to receive a separation force from the electronic photographic imaging device to rotate the developing frame relative to the drum frame, so as to drive the developing frame to switch from a first position to a second position; the rotation axis of the force transmitting member coincides with the rotation axis of the developing frame relative to the drum frame.

8. The process cartridge according to claim 6, wherein: A mounting portion is provided on the developing frame, and a connecting piece is provided on the end surface of the movable gear away from the transmission gear. The movable gear is arranged on the mounting portion through the connecting piece and can move relative to the mounting portion; a pressing portion is provided on the drum frame, and a matching portion corresponding to the pressing portion is provided on the connecting piece. The pressing portion can abut against the matching portion and drive the connecting piece to move.

9. The process cartridge according to claim 8, wherein: The matching portion is in a conical shape, and the pressing portion is in a convex block shape matched with the matching portion.

10. The process cartridge according to claim 8, wherein: The mounting portion is provided with an elastic member. During the process of the developing frame switching from the first position to the second position, the movable gear moves from the third position to the fourth position and squeezes the elastic member at the same time. When the developing frame switches from the second position to the first position, under the action of the restoring force of the elastic member, the movable gear moves from the fourth position to the third position, and the movable gear engages with the transmission gear.

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