Developing cartridge

Abstract

The utility model relates to a developing box which comprises a powder inlet and a powder return opening which are formed in the developing box and used for communicating a powder bin with a developing bin, the powder bin is used for containing carbon powder, the developing bin is provided with a developing roller, the carbon powder in the powder bin can enter the developing bin through the powder inlet, and the carbon powder in the developing bin can return to the powder bin from the powder return opening; the powder inlet and the powder return opening are located in the same horizontal line, and a powder feeding assembly is further arranged in the powder bin and used for evenly conveying carbon powder into the powder inlet. According to the developing box, the powder inlet and the powder return opening are located on the same horizontal line, in the powder feeding process, the supply uniformity of carbon powder is maintained when the carbon powder is conveyed by the screw, and normal development work is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of electronic photography, in particular to a developing box. Background Art

[0002] The developing cartridge can be installed to the main assembly of an electrophotographic imaging device alone or together with a photosensitive drum cartridge having a photosensitive drum to form a processing cartridge. Such electrophotographic imaging devices can be, for example, laser printers, copiers, fax machines, etc. During the imaging operation, an electrostatic latent image is formed on the photosensitive drum, and the developing roller of the developing cartridge can supply developer to the photosensitive drum to develop the electrostatic latent image on the photosensitive drum.

[0003] There is an existing developer box, whose toner inlet 44a and toner return port 44b are staggered on the horizontal line, which may cause the problem of uneven powder supply when the screw is feeding powder. The toner supply at the end of the screw near the powder return port is small, which has a greater adverse effect on the development. Utility Model Content

[0004] The utility model aims to provide a developing box with more uniform carbon powder transmission.

[0005] To achieve the above-mentioned purpose, the utility model provides a developing box, including a powder inlet and a powder return port opened on the developing box for connecting the powder bin and the developing bin, the powder bin being used to accommodate carbon powder, the developing bin being provided with a developing roller, the carbon powder in the powder bin being able to enter the developing bin through the powder inlet, and the carbon powder in the developing bin being able to return to the powder bin from the powder return port; the powder inlet and the powder return port are on the same horizontal line, and a powder feeding assembly is also provided in the powder bin, the powder feeding assembly being used to transport carbon powder into the powder inlet.

[0006] Furthermore, the powder inlet and the powder return port are respectively arranged at two ends of the developer box.

[0007] Furthermore, the powder inlet is located in the middle of the developing box, and two powder return ports are provided, and the two powder return ports are provided on both sides of the powder inlet.

[0008] Furthermore, the two powder return ports are symmetrically arranged on both sides of the powder inlet.

[0009] Furthermore, the powder bin includes a first rotatable screw, and the first screw is used to transport the carbon powder at both ends to the middle.

[0010] Furthermore, the powder bin also includes a second rotatable screw, the axis of the second screw is perpendicular to the axis of the first screw, the second screw is used to receive carbon powder transported to the middle position from the first screw, and the end of the second screw away from the first screw is connected to the powder inlet.

[0011] Furthermore, the first screw rod is arranged at the end of the powder bin away from the powder inlet.

[0012] Furthermore, the powder feeding assembly includes a stirring frame arranged in the powder bin for stirring toner, and the first screw rod cooperates with the stirring frame to feed powder.

[0013] Furthermore, a screw rod for supplying powder is arranged in the developing cartridge, and the screw rod conveys the toner entering the developing cartridge through the powder inlet to both ends of the developing roller.

[0014] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0015] In this developing cartridge, the powder inlet and the powder return port are on the same horizontal line. During the powder feeding process, the uniformity of toner supply during toner transportation is maintained, ensuring the normal progress of the developing work.

[0016] The following further elaborates on the present utility model in detail in conjunction with the accompanying drawings and specific embodiments. Description of the Drawings

[0017] Figure 1 It is a plan view of the developing cartridge in Embodiment 1;

[0018] Figure 2 It is a plan view of the developing cartridge in Embodiment 2;

[0019] Figure 3 It is a plan view of the powder feeding assembly in Embodiment 2. Specific Embodiments

[0020] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments.

[0021] Examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the accompanying drawings are exemplary and are intended to explain the present utility model, and should not be construed as a limitation to the present utility model.

[0022] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model.

[0023] In the present utility model, unless otherwise clearly specified and defined, terms such as "installation", "connection", "connection", "fixation", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0024] The present utility model provides a developing cartridge, which includes a powder inlet 1 and a powder return port 2 opened on the developing cartridge for communicating the powder bin and the developing chamber. The powder inlet 1 and the powder return port 2 are on the same horizontal line. A powder delivery assembly is also provided in the developing cartridge, and the powder delivery assembly is used to deliver toner.

[0025] Embodiment 1

[0026] In this embodiment, referring to Figure 1 , the powder inlet 1 and the powder return port 2 are respectively arranged at both ends of the developing cartridge. The powder delivery assembly is a screw rod for supplying powder arranged in the developing chamber. The screw rod is a one-way screw rod structure. The toner in the powder bin enters the developing chamber from the powder inlet 1. Since the powder inlet 1 and the powder return port 2 are designed on the same horizontal line, the screw rod can evenly deliver the toner to any position on the screw rod during the powder delivery process, and evenly deliver the toner to the developing roller, ensuring the normal progress of the developing operation. The remaining toner returns to the powder bin through the powder return port 2. Designing the powder inlet 1 and the powder return port 2 on the same horizontal line can avoid the toner from scattering and accumulating in the developing chamber near the powder return port, thereby avoiding too little toner on the screw rod near the powder return port 2 and affecting the toner supply to the developing roller.

[0027] Embodiment 2

[0028] Referring to Figure 2The powder inlet 1 is located in the middle of the developing box, and the powder return port 2 is arranged on both sides of the powder inlet 1. Preferably, the powder return port 2 is symmetrically arranged relative to the powder inlet 1. The powder inlet 1 and the powder return port 2 are also located on the same horizontal plane, in the form of three openings. In this embodiment, the screw for powder supply in the developing bin is preferably capable of conveying the carbon powder entering the developing bin through the powder inlet to both ends of the developing roller, such as a symmetrical screw.

[0029] In this scenario, see Figure 3 The powder feeding assembly in the powder bin includes a stirring frame 3, which is arranged in the powder bin and is used to stir the carbon powder. The first screw 4 is arranged in the powder bin to cooperate with the stirring frame 3 to feed the powder. It should be noted that the first screw 4 is a symmetrical screw, so that the carbon powder at both ends of the first screw 4 is transported to the middle at the same time. A rotatable second screw 5 is provided in the powder bin, and the axis of the second screw 5 is perpendicular to the axis of the first screw 4. The second screw 5 is used to receive the carbon powder transported to the middle position from the first screw 4. The end of the second screw 5 away from the first screw 4 is connected to the powder inlet 1, and the second screw 5 transports the carbon powder to the powder inlet 1 to maintain the uniformity of the carbon powder supply during the screw transportation, so as to ensure the normal development work. The remaining carbon powder returns to the powder bin through the powder return port 2.

[0030] Preferably, the first screw 4 can be arranged at the end of the powder bin away from the powder inlet 1, which can effectively convey the carbon powder, avoid the accumulation of carbon powder away from the powder inlet 1, and improve the utilization rate of the carbon powder.

[0031] In addition, a processing box is also provided, using the developing box in the above embodiment.

[0032] The above-mentioned implementation modes are only preferred implementation modes of the present invention, and cannot be used to limit the protection scope of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.

Claims

1. Developing cartridge, characterized in that, The developing box comprises a powder inlet and a powder return port which are provided on the developing box and are used to connect the powder bin and the developing bin. The powder bin is used to contain carbon powder. The developing bin is provided with a developing roller. The carbon powder in the powder bin can enter the developing bin through the powder inlet, and the carbon powder in the developing bin can return to the powder bin from the powder return port. The powder inlet and the powder return port are on the same horizontal line. A powder feeding assembly is also provided in the powder bin, and the powder feeding assembly is used to transport carbon powder into the powder inlet.

2. The developing cartridge according to claim 1, wherein The powder inlet and the powder return port are respectively arranged at two ends of the developing box.

3. The developing cartridge according to claim 1, wherein, The powder inlet is located in the middle of the developing box, and two powder return ports are provided, and the two powder return ports are arranged on both sides of the powder inlet.

4. The developing cartridge according to claim 3, wherein, The two powder return ports are symmetrically arranged on both sides of the powder inlet.

5. The developing cartridge according to claim 3, wherein The powder bin includes a first screw which is rotatably arranged therein, and the first screw is used to transport the carbon powder at both ends thereof to the middle.

6. The developing cartridge according to claim 5, characterized in that, The powder bin also includes a second rotatable screw, the axis of the second screw is perpendicular to the axis of the first screw, the second screw is used to receive carbon powder transported to the middle position from the first screw, and the end of the second screw away from the first screw is connected to the powder inlet.

7. The developing cartridge according to claim 6, wherein The first screw is arranged at an end of the powder bin away from the powder inlet.

8. The developing cartridge according to claim 7, characterized in that, The powder feeding assembly comprises a stirring frame, which is arranged in the powder bin and is used for stirring carbon powder. The first screw cooperates with the stirring frame to feed powder.

9. The developing cartridge according to any one of claims 1-8, characterized in that, A screw for supplying powder is arranged in the developing bin, and the screw conveys the carbon powder entering the developing bin through the powder inlet to the two ends of the developing roller.

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