Developing cartridge, split cartridge, and image forming apparatus

Abstract

The utility model provides a developing cartridge, split cartridge and imaging equipment, developing cartridge includes developing frame and rotatory piece, developing frame is equipped with bearing part, after the bearing part bears force, developing cartridge moves away from photosensitive drum direction, rotatory piece includes developing roller, one side of developing frame is equipped with drive gear, and the drive gear is equipped with drive gear. The driving gear is in driving connection with the rotating piece and can drive the rotating piece to rotate; the developing box can move between a working position and a cleaning position relative to the drum box; when the developing box is located at the working position, the driving gear is meshed with the driving piece, and the driving piece drives the photosensitive drum to rotate and drives the rotating piece to rotate; when the developing box is located at the cleaning position, the developing roller is separated from the photosensitive drum, the driving gear is separated from the driving piece, the photosensitive drum rotates, and the rotating piece stops rotating. According to the developing box, the problem that driving force transmission cannot be realized due to unstable connection of a driving structure can be avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of electronic photographic imaging, in particular to a developing box, a split box and an imaging device. Background Art

[0002] An electronic photographic imaging device is a device that uses the principle of electronic photography to form an image on a printing medium such as paper. An existing imaging device includes an imaging device main body and a split box installed in the imaging device main body, the split box includes a drum box and a developing box detachably installed on the drum box, a first driving head is provided at the end of the drum box, the first driving head is used to receive the driving force provided by the imaging device main body to the photosensitive drum, and a second driving head is provided at the end of the developing box, the second driving head is used to receive the driving force provided by the imaging device main body to the developing roller and the powder feeding roller, etc.

[0003] When the photosensitive drum needs to be cleaned, the pusher in the imaging device body applies a pushing force to the developer box, so that the developer roller is separated from the photosensitive drum. At this time, the first drive head drives the photosensitive drum to continue rotating, and under the action of the cleaning scraper in the drum box, the waste powder on the photosensitive drum is transferred to the waste powder bin of the drum box. At the same time, when the pusher applies a pushing force to the developer box to force the developer box to move, the second drive head on the developer box needs to be disengaged from the second transmission head in the imaging device body. After the cleaning is completed and the developer box is reset, the second drive head needs to be reengaged with the second transmission head. In the process of continuous disengagement, it is very easy to cause the connection between the two to be unstable, resulting in the problem of failure to achieve driving force transmission. Utility Model Content

[0004] The first object of the utility model is to provide a developing box which can avoid the problem that the driving force cannot be transmitted due to the unstable connection of the driving structure.

[0005] The second object of the utility model is to provide a split box using the above-mentioned developing box.

[0006] The third object of the utility model is to provide an imaging device using the split box.

[0007] To achieve the above-mentioned first purpose, the utility model provides a developing box, which can be detachably installed in the drum box; the drum box includes a drum frame, a photosensitive drum and a cleaning scraper, the photosensitive drum is rotatably supported on the drum frame, the axial end of the photosensitive drum is provided with a driving member, the driving member is used to receive the rotational driving force, and the free end of the cleaning scraper abuts against the outer surface of the photosensitive drum; the developing box includes a developing frame and a rotating member, the rotating member is rotatably supported on the developing frame, the developing frame has a powder bin, the developing frame is provided with a force-bearing part, the developing frame is hinged to the drum frame, and after the force-bearing part is subjected to the force, the developing box can move toward The developing drum moves in a direction away from the photosensitive drum, and the rotating part includes a developing roller, which is located at the powder outlet of the powder bin; a driving gear is provided on one side of the developing frame, and the driving gear is connected to the rotating part and can drive the rotating part to rotate; the developing box can move between a working position and a cleaning position relative to the drum box; when the developing box is in the working position, the developing roller contacts the photosensitive drum, the driving gear engages with the driving part, and the driving part drives the photosensitive drum to rotate and drives the rotating part to rotate; when the developing box is in the cleaning position, the developing roller is separated from the photosensitive drum, the driving gear is disengaged from the driving part, the photosensitive drum rotates and the rotating part stops rotating.

[0008] It can be seen from the above scheme that by removing the driving head on the developing box and adding a driving gear, each rotating member in the developing box can receive the rotational driving force through the driving gear. In this way, when the developing box is in the working position, the driving gear is meshed with the driving member, and the driving member drives the photosensitive drum to rotate and drives the rotating members such as the developing roller to rotate. When the developing box moves to the cleaning position, since the driving gear is disengaged from the driving member, the driving force of the driving member will not be transmitted to the rotating member, and the driving member drives the photosensitive drum to rotate to achieve the cleaning of the photosensitive drum. Since the second transmission head in the imaging device does not need to engage or disengage with the driving gear during the movement of the developing box, it can avoid the problem in the prior art that the driving force cannot be transmitted due to the unsmooth engagement and disengagement process of the driving structure.

[0009] A preferred solution is that the rotating member further includes a stirring frame, which is located in the powder bin and transports the developer toward the developing roller. An axial end of the stirring frame is provided with a stirring frame gear drivingly connected to the driving gear.

[0010] It can be seen that the stirring frame is also driven by the driving force received by the driving gear.

[0011] A further solution is that the developing box also includes a first intermediate gear and a second intermediate gear, and the first intermediate gear and the second intermediate gear are both rotatably mounted on the end wall of the developing frame, and the driving gear transmits the driving force to the stirring frame through the first intermediate gear and the second intermediate gear in sequence.

[0012] It can be seen that the gear train consisting of the driving member, the driving gear, the first intermediate gear, the second intermediate gear and the stirring frame gear can achieve stable transmission of the rotational driving force.

[0013] A preferred solution is that the number of the force-bearing parts is two, and the two force-bearing parts are respectively arranged at two ends of the developing frame in the length direction.

[0014] It can be seen that force-bearing parts are provided at both ends of the developing frame, which can ensure that the forces at both ends of the developing frame in the length direction are balanced, so that the developing box can stably switch between the working position and the cleaning position.

[0015] A preferred solution is that the driving member includes a gear portion and a driving force receiving head, and the gear portion is arranged coaxially with the photosensitive drum and can mesh with the driving gear.

[0016] It can be seen that the driving force receiving head is used to receive the driving force of the imaging device, and the gear portion is used to engage with the driving gear to provide driving force to rotating parts such as the developing roller.

[0017] A further solution is that the gear portion and the driving force receiving head are located at the same end of the photosensitive drum; or the gear portion and the driving force receiving head are located at two ends of the photosensitive drum respectively.

[0018] It can be seen from this that the gear train and the driving force receiving head can be located at the same end of the photosensitive drum or can be arranged at both ends respectively.

[0019] In order to achieve the above second purpose, the utility model provides a split box, which includes a developing box and a drum box that are detachably connected.

[0020] To achieve the third purpose mentioned above, the utility model provides an imaging device, including a device body and the above-mentioned split box, wherein a first transmission head and a second transmission head are arranged in the device body; in the working position and the cleaning position, the first transmission head is connected to the driving member, and the second transmission head is separated from the driving gear. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a structural diagram of the developer box embodiment and photosensitive drum and other components of the utility model.

[0022] Figure 2 It is a partial enlarged view of the developer box embodiment and the photosensitive drum and other components of the utility model.

[0023] Figure 3 It is a cross-sectional view of a developer box embodiment and components such as a photosensitive drum of the utility model.

[0024] The present invention will be further described below with reference to the accompanying drawings and embodiments. DETAILED DESCRIPTION

[0025] Developer box and split box embodiment:

[0026] See also Figures 1 to 3 The split box in this embodiment includes a developing box 1 and a drum box (not shown) that are detachably connected.

[0027] The drum box includes a drum frame, a photosensitive drum 2 and a cleaning scraper. The photosensitive drum 2 is rotatably supported on the drum frame. A driving member 3 is provided at the axial end of the photosensitive drum 2. The driving member 3 is used to receive a rotational driving force. The free end of the cleaning scraper abuts against the outer surface of the photosensitive drum 2.

[0028] The developing box 1 can be detachably installed in the drum box, and the developing box 1 includes a developing frame 11 and a rotating member 12. The rotating member 12 is rotatably supported on the developing frame 11. The developing frame 11 has a powder bin 10. The rotating member 12 includes a developing roller 121 and a stirring frame 122. The developing roller 121 is located at the powder outlet 101 of the powder bin 10, and the stirring frame 122 is located in the powder bin 10. The stirring frame 122 transports the developer toward the developing roller 121.

[0029] The developing frame 11 is provided with a force-bearing portion 111, which is hinged to the drum frame. The force-bearing portion 111 is hook-shaped and extends downward from the developing frame 11. There are two force-bearing portions 111, which are respectively provided at both ends of the length direction of the developing frame 11. After the force-bearing portion 111 is subjected to a force, the developing cartridge 1 moves in a direction away from the photosensitive drum 2. Both ends of the developing frame 11 are provided with force-bearing portions 111, which can ensure that the force at both ends of the length direction of the developing frame 11 is balanced, so that the developing cartridge 1 can stably move between the working position and the cleaning position.

[0030] A driving gear 13, a stirring frame gear 14, a first intermediate gear 15 and a second intermediate gear 16 are provided on one side of the developing frame 11. The driving gear 13 is arranged at the axial end of the developing roller 121 and is coaxial with the developing roller 121. The stirring frame gear 14 is arranged at the axial end of the stirring frame 122 and is coaxial with the stirring frame 122. The first intermediate gear 15 and the second intermediate gear 16 are both rotatably mounted on the end wall of the developing frame 11. The driving gear 13 transmits the driving force to the stirring frame 122 through the first intermediate gear 15 and the second intermediate gear 16 in sequence.

[0031] The driving member 3 includes a gear portion 31, which is meshed with a driving tooth portion of a first transmission head of the imaging device and is used to receive a driving force of the imaging device, and is used to mesh with a driving gear 13 to provide a rotational driving force to a rotating member 12 such as a developing roller 121. The gear portion 31 is coaxially arranged with the photosensitive drum 2.

[0032] The developing box 1 can move between the working position and the cleaning position relative to the drum box. When the developing box 1 is in the working position, the developing roller 121 contacts the photosensitive drum 2, the driving gear 13 meshes with the gear portion 31 of the driving member 3, and the driving member 3 drives the photosensitive drum 2 to rotate and drives the rotating member 12 to rotate; when the force-bearing portion 111 is driven by the force to drive the developing box 1 to the cleaning position, the developing roller 121 separates from the photosensitive drum 2, the driving gear 13 disengages from the gear portion 31 of the driving member 3, the photosensitive drum 2 rotates and the rotating member 12 stops rotating.

[0033] As can be seen from the above, by removing the driving head on the developing box and adding a driving gear, each rotating member in the developing box can receive the rotational driving force through the driving gear. In this way, when the developing box is in the working position, the driving gear is meshed with the driving member, and the driving member drives the photosensitive drum to rotate and drives the rotating members such as the developing roller to rotate. When the developing box moves to the cleaning position, since the driving gear is disengaged from the driving member, the driving force of the driving member will not be transmitted to the rotating member, and the driving member drives the photosensitive drum to rotate to achieve the cleaning of the photosensitive drum. Since the second transmission head in the imaging device does not need to engage or disengage with the driving gear during the movement of the developing box, the problem of the inability to achieve driving force transmission due to the unsmooth engagement and disengagement of the driving structure in the prior art can be avoided.

[0034] Imaging device embodiment:

[0035] The imaging device in this embodiment comprises a device body and a split box in the above split box embodiment, wherein a first transmission head and a second transmission head are arranged in the device body. In the working position and the cleaning position, the first transmission head is connected to the driving member, and the second transmission head is separated from the driving gear.

[0036] In addition, the driving member may also include a gear portion and a driving force receiving head, wherein the driving force receiving head is used to receive the driving force of the imaging device, and the gear portion is used to mesh with the driving gear to provide driving force to rotating members such as the developing roller. The gear portion and the driving force receiving head may be located at the same end of the photosensitive drum; or the gear portion and the driving force receiving head may be located at the two ends of the photosensitive drum respectively. The above changes can also achieve the purpose of the utility model.

[0037] Finally, it should be emphasized that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various changes and modifications. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A developing cartridge, which can be detachably mounted in the drum cartridge; The drum cartridge comprises a drum frame, a photosensitive drum and a cleaning blade, wherein the photosensitive drum is rotatably supported on the drum frame, a driving member is provided at an axial end of the photosensitive drum, the driving member is used to receive a rotational driving force, and a free end of the cleaning blade abuts against an outer surface of the photosensitive drum; The developing box comprises a developing frame and a rotating member, the rotating member is rotatably supported on the developing frame, the developing frame has a powder bin, the developing frame is provided with a force-bearing portion, the developing frame is hinged with the drum frame, after the force-bearing portion is subjected to a force, the developing box can move in a direction away from the photosensitive drum, the rotating member comprises a developing roller, and the developing roller is located at the powder outlet of the powder bin; Features: A driving gear is disposed on one side of the developing frame, and the driving gear is drivingly connected to the rotating member and can drive the rotating member to rotate; The developing cartridge is movable relative to the drum cartridge between a working position and a cleaning position; When the developing box is located at the working position, the developing roller contacts the photosensitive drum, the driving gear meshes with the driving member, and the driving member drives the photosensitive drum to rotate and drives the rotating member to rotate; When the developing box is located at the cleaning position, the developing roller is separated from the photosensitive drum, the driving gear is disengaged from the driving member, the photosensitive drum rotates and the rotating member stops rotating.

2. The developing cartridge according to claim 1, characterized in that: The rotating member further comprises a stirring frame, the stirring frame is located in the powder bin, the stirring frame transports the developer toward the developing roller, and an stirring frame gear drivingly connected to the driving gear is disposed at an axial end of the stirring frame.

3. The developing cartridge according to claim 2, characterized in that: The developing box also includes a first intermediate gear and a second intermediate gear, and the first intermediate gear and the second intermediate gear are both rotatably mounted on the end wall of the developing frame. The driving gear transmits driving force to the stirring frame through the first intermediate gear and the second intermediate gear in sequence.

4. The developer cartridge according to any one of claims 1 to 3, characterized in that: The number of the force-bearing parts is two, and the two force-bearing parts are respectively arranged at two ends of the developing frame in the length direction.

5. The developer cartridge according to any one of claims 1 to 3, characterized in that: The driving member includes a gear portion and a driving force receiving head, wherein the gear portion is coaxially arranged with the photosensitive drum and can mesh with the driving gear.

6. The developing cartridge according to claim 5, characterized in that: The gear portion and the driving force receiving head are located at the same end of the photosensitive drum; or The gear part and the driving force receiving head are respectively located at two ends of the photosensitive drum.

7. A split box, comprising a developer box and a drum box which are detachably connected, characterized in that: The developing cartridge is the developing cartridge according to any one of claims 1 to 6.

8. An imaging device, characterized in that It comprises a device body and a split box as claimed in claim 7, wherein a first transmission head and a second transmission head are arranged in the device body; In the working position and the cleaning position, the first transmission head is connected to the driving member, and the second transmission head is separated from the driving gear.

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