Developing box

Abstract

The utility model discloses a developing box. The developing box comprises a shell, a developing roller; a powder feeding roller; an input gear; a developing roller gear which drives the developing roller to rotate by using the driving force transmitted from the input gear; the powder feeding roller gear is used for driving the powder feeding roller to rotate by utilizing the driving force transmitted from the input gear; the first idle gear can receive the driving force of the input gear; the first idle gear is in meshed connection with the developing roller gear so as to transmit driving force to the developing roller gear; the first idle gear is in meshed connection with the powder feeding roller gear so as to transmit driving force to the powder feeding roller gear; compared with the prior art, through simple layout, the rotating stability of the driven powder feeding roller and the driven developing roller is improved, so that the problem that the powder feeding roller and the developing roller shake excessively in the rotating process due to the fact that the input gear directly drives the powder feeding roller gear and the developing roller gear is solved.

Description

Technical Field

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

[0002] The prior art discloses an electronic photographic imaging device such as a laser printer and a developer cartridge detachably installed in the laser printer. The developer cartridge includes a developer frame containing a developer and a powder feed roller, a developing roller and a stirring frame rotatably supported on the developing frame. The rotation of the powder feed roller, the developing roller and the stirring frame is achieved by driving an input gear. Specifically, a powder feed roller gear and a developing roller gear are respectively provided at one end in the length direction of the powder feed roller and the developing roller, and a stirring frame gear is provided at one end in the length direction of the stirring frame. In the prior art, one of the powder feed roller gear and the developing roller gear is first connected to the input gear directly or through an idler gear, and then the two are connected through the idler gear to transmit the driving force of the input gear to the powder feed roller gear and the developing roller gear.

[0003] However, the powder feeding roller serves as a developer conveying component and the developing roller serves as a developer carrying component. The powder feeding roller will maintain contact with the developing roller during the development process of the developing cartridge and needs to transport the developer on it to the developing roller, while the developing roller will maintain close contact with the photosensitive drum during the development process of the developing cartridge and needs to transport the developer carried on it to the photosensitive drum. The importance of the powder feeding roller and the developing roller in the developing cartridge is self-evident. However, after adopting the above-mentioned layout of the powder feeding roller gear and the developing roller gear, the jitter of the powder feeding roller and the developing roller during rotation will become greater, which greatly affects the developer conveying effect of the powder feeding roller and the developing roller, and thus affects the printing imaging effect of the developing cartridge. Therefore, there is an urgent need to solve this series of problems. Utility Model Content

[0004] Therefore, the present invention provides a developing cartridge to solve the above technical problems, which is mainly achieved through the following technical solutions:

[0005] A developing cartridge, comprising:

[0006] a housing for accommodating a developer, the housing having a first side and a second side separately disposed in a first direction, and a third side and a fourth side separately disposed in a second direction intersecting the first direction;

[0007] a developing roller, configured to carry a developer, wherein the developing roller is rotatable about a developing roller axis extending in the first direction;

[0008] a powder feeding roller, for feeding developer to the developing roller, wherein the powder feeding roller is rotatable about an axis of the powder feeding roller extending in the first direction;

[0009] an input gear for receiving a driving force from outside the developing cartridge and rotatable about an input gear axis extending in the first direction;

[0010] a developing roller gear, which drives the developing roller to rotate using the driving force transmitted from the input gear;

[0011] a powder feeding roller gear, which drives the powder feeding roller to rotate using the driving force transmitted from the input gear;

[0012] a first idler gear, capable of receiving a driving force from the input gear;

[0013] The first idler wheel is meshedly connected with the developing roller gear to transmit driving force to the developing roller gear;

[0014] The first idler gear is meshed with the powder feeding roller gear to transmit driving force to the powder feeding roller gear.

[0015] Furthermore, it also includes a chip having an electrical contact surface, wherein the electrical contact surface is located on the first side of the shell in the first direction, and the electrical contact surface is closer to the third side of the shell relative to the fourth side of the shell in the second direction.

[0016] Furthermore, it also includes a second idler gear meshing with the input gear, a plurality of idler gears are arranged between the first idler gear and the second idler gear, and the number of the plurality of idler gears is set to an even number.

[0017] Furthermore, it also includes a stirring frame and a stirring frame gear, and a third idler gear is provided between the stirring frame gear and the input gear.

[0018] Further, the stirring frame gear can rotate around the stirring frame gear axis extending in the first direction, and the third idler gear can rotate around the third idler gear axis extending in the first direction;

[0019] In the second direction, the agitator frame gear axis is closer to the third side of the housing than the third idler gear axis.

[0020] Furthermore, it also includes a support plate and a second idler wheel meshing with the input gear, the support plate can rotatably support the developing roller and the powder feeding roller, and the support plate extends a plurality of support columns in the first direction, and the plurality of support columns are used to rotatably support the first idler wheel and the second idler wheel.

[0021] Furthermore, it also includes a second idler gear meshing with the input gear, the input gear has teeth meshing with the second idler gear, wherein the number of the teeth is 34-50.

[0022] Furthermore, the developing roller gear has teeth meshingly connected with the first idler gear, wherein the number of the teeth is 15-25.

[0023] Furthermore, the powder feeding roller gear has teeth meshingly connected with the first idler gear, wherein the number of the teeth is 15-25. Beneficial effects

[0024] In the gear system of the developer box provided by the present invention, the developing roller gear and the powder feeding roller gear are not directly engaged with the input gear. The powder feeding roller gear and the developing roller gear are connected to the input gear through a common idler gear. Through a simple layout, the rotational stability of the driven powder feeding roller and the developing roller is improved, thereby avoiding the problem that the input gear directly drives the powder feeding roller gear and the developing roller gear, causing the powder feeding roller and the developing roller to vibrate excessively during rotation. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a three-dimensional structural diagram of the developing box of the utility model;

[0026] Figure 2 It is a three-dimensional structural diagram of the developing box of the utility model from another angle;

[0027] Figure 3 It is a cross-sectional perspective view of the developing cartridge of the present invention in the vertical direction;

[0028] Figure 4 It is a left side view of the gear train of the developer cartridge of the present invention;

[0029] Figure 5 It is a left side schematic diagram of the developer cartridge of the present invention;

[0030] Figure 6 It is a partially exploded schematic diagram of the left end portion of the developer cartridge of the present invention;

[0031] Figure 7 It is a partially exploded schematic diagram of another angle of the left end portion of the developer cartridge of the present invention. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solution and technical effect of the embodiment of the present invention more clear, the technical solution of the process cartridge of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiment described is only a preferred embodiment of the present invention, not the only embodiment. Based on the embodiment of the present invention, other embodiments obtained by those skilled in the art without creative work shall fall within the scope of protection of the present invention.

[0033] In the following description, when referring to the direction of the developing box 100, the axial direction of the developing roller 120 is taken as the first direction (left-right direction), and the end cover 112 is located on the left side of the main body 111; the second direction (front-back direction) is defined as the arrangement direction of the developing roller axis and the stirring frame axis, and the developing roller axis is located at the front end of the stirring frame axis; the third direction (up-down direction) is the direction intersecting the first direction and the second direction.

[0034] like Figure 1-7 As shown, the present invention provides a developing cartridge 100 that can be detachably mounted to a drum cartridge (not shown), and can be connected to the drum cartridge and detachably mounted to an electrophotographic imaging device (hereinafter referred to as "imaging device"). The developing box 100 includes a shell 110, which includes a main body 111 for accommodating developer, and an end cover 112 detachably mounted on the left side of the main body 111; a stirring frame 140 for stirring the developer is provided inside the main body 111, and the stirring frame 140 can rotate around the stirring frame axis extending in the left and right directions, and at least part of the stirring frame 140 is located inside the main body 111; the developing box 100 also includes a developing roller 120 for carrying developer, and a powder feeding roller 130 for feeding developer to the developing roller 120, the developing roller 120 is rotatably supported at the front end of the shell 110, the developing roller 120 can rotate around the developing roller axis extending in the left and right directions, the developing roller 120 is in contact with the powder feeding roller 130, and the powder feeding roller 130 can rotate around the powder feeding roller 130 axis extending in the left and right directions. During the development operation, the developer cartridge 100 is mounted to the drum cartridge, the developer roller 120 contacts the photosensitive drum (not shown) of the drum cartridge, the stirring frame 140 rotates to stir the developer inside the housing 110 and delivers the developer to the powder feeding roller 130, the powder feeding roller 130 rotates to deliver the developer to the developer roller 120, the developer roller 120 rotates and delivers the developer to the photosensitive drum to develop the electrostatic latent image on the photosensitive drum.

[0035] The developing box 100 includes an electrode 160, which includes an electrical contact portion. The electrical contact portion is arranged on the right side of the shell 110, and in the front-to-back direction, the electrical contact portion is located between the rotation axis of the input gear 150 described later and the rotation axis of the developing roller 120. After the developing box 100 is installed to the imaging device, the electrical contact portion contacts the power supply component (not shown) of the imaging device to receive power provided by the imaging device, and supplies power to the developing roller 120 and the supply roller 130, thereby ensuring smooth delivery of the developer. The developing box 100 also includes a storage chip 180 and a chip rack 170 for supporting the storage chip 180. The storage chip 180 also includes an electrical contact surface 181 and a storage portion (not shown). In the front-to-back direction, the electrical contact surface 181 is located behind the rotation axis of the input gear 150. The electrical contact surface 181 can contact the electrical contact point (not shown) of the imaging device, so that the developing box 100 establishes a communication connection with the imaging device. The storage portion is used to record information such as the model, newness, and page yield of the developing box 100. The storage portion is electrically connected to the electrical contact surface 181. When the developing box 100 is installed to the imaging device, the storage portion establishes an electrical connection with the imaging device through the electrical contact surface 181 and the electrical contact point, so that the developing box 100 establishes a communication connection with the imaging device, thereby reading the information of the developing box 100. When the developer in the developing box 100 is about to be consumed, the imaging device can prompt the user to replace the new developing box 100 through the operation panel.

[0036] like Figure 5 As shown, the developer cartridge 100 further includes multiple protrusions extending from both sides of the housing 110 in the left-right direction. Specifically, the end cap 112 is provided with a guide protrusion 112a, a biasing protrusion 112c, and a force-receiving protrusion 112b. The force-receiving protrusion 112b extends outward from the guide protrusion 112a in the left-right direction. The guide protrusion 112a is used to cooperate with the drum frame (not shown) of the drum cartridge to guide the installation of the developer cartridge 100. The biasing protrusion 112c can receive force from the biasing portion (not shown) of the drum cartridge to maintain close contact between the developer roller 120 and the photosensitive drum. In the front-to-back direction, the guide protrusion 112a, the biasing protrusion 112c, and the force-receiving protrusion 112b are all located on the front side of the rotation axis of the input gear 150. The force-receiving protrusion 112b can contact the drum-side cam (not shown) of the drum cartridge to receive the force that separates the developer roller 120 from the photosensitive drum. The guide protrusion 112 a , the pushing protrusion 112 c and the force-bearing protrusion 112 b may be integrally formed with the end cover 112 , or may be separately mounted on the end cover 112 .

[0037] In order to realize the rotation of the above-mentioned developing roller 120, powder feeding roller 130 and stirring frame 140, the developing box 100 is provided with a gear train, which is arranged on the left side of the shell 110, and the end cover 112 can cover at least a part of the gear train to prevent the gear train from being interfered with during use; the shell 110 also includes a support plate 113 located between the end cover 112 and the main body 111, and the left side of the support plate 113 extends a plurality of protrusions in the left and right directions that can support the gears in the gear train. The gear system includes but is not limited to an input gear 150, a stirring frame gear 152, a developing roller gear 155, a powder feeding roller gear 156 and a plurality of idler gears; the input gear 150 includes a coupling portion 150a and a gear portion 150b, the coupling portion 150a is exposed on the left side of the end cover 112 through a through hole provided on the end cover 112, and when the developing cartridge 100 is mounted on the imaging device, the coupling portion 150a is connected to a driving member (not shown) inside the imaging device to receive a driving force from the imaging device, so that the input gear 150 can rotate around the input gear axis extending in the left-right direction; the stirring frame gear 152 is connected to the input gear 155. At the left end of the stirring frame 140, a first idler gear 151 is provided between the stirring frame gear 152 and the input gear 150. The first idler gear 151 includes a large gear portion 151a and a small gear portion 151b. The large gear portion 151a is engaged with the gear portion 150b of the input gear 150, and the small gear portion 151b is engaged with the stirring frame gear 152. The stirring frame gear 152 receives the driving force of the input gear 150 through the first idler gear 151 to drive the stirring frame 140 to rotate and reduce the rotation speed of the stirring frame 140 to stir the developer inside the main body 111, thereby improving the rotation stability of the stirring frame 140.

[0038] The developing roller gear 155 and the powder feeding roller gear 156 are connected to the left ends of the developing roller 120 and the powder feeding roller 130 respectively; a plurality of idler gears are provided between the developing roller gear 155 and the powder feeding roller gear 156 and the input gear; the number of idler gears is set to an even number to ensure that the rotation direction of the developing roller gear 156 and the powder feeding roller gear 155 is different from the rotation direction of the input gear 150, that is, the number of idler gears between the developing roller gear 155 and the powder feeding roller gear 156 and the input gear 150 is 2, 4, 6, 8, ..., 2n. (n is a positive integer), the above-mentioned multiple idler gears are meshed and connected in sequence; the idler gear closest to the input gear 150 among the above-mentioned multiple idler gears is meshed and connected with the input gear 150, and the developing roller gear 155 and the powder feeding roller gear 156 are simultaneously meshed and connected with the idler gears far away from the input gear 150 among the above-mentioned multiple idler gears, so as to receive the driving force of the input gear 150 through the above-mentioned idler gears, so that the developing roller gear 155 and the powder feeding roller gear 156 respectively drive the developing roller 120 and the powder feeding roller 130 to rotate around their respective axes extending in the left and right directions.

[0039] Preferably, a third idler gear 153 and a fourth idler gear 154 are provided between the developing roller gear 155 and the powder feeding roller gear 156 and the input gear, the third idler gear 153 is meshed with the input gear 150, the fourth gear 154 is meshed with the developing roller gear 155 and the powder feeding roller gear 156 respectively, and the fourth gear 154 is meshed with the third gear 153; the developing roller gear 155 and the powder feeding roller gear 156 are connected to the input gear 150 through the fourth idler gear 154 and the third idler gear 153, so that they can receive the driving force of the input gear 150 to respectively drive the developing roller 120 and the powder feeding roller 130 to rotate around their respective axes extending in the left and right directions.

[0040] like Figure 7 As shown, the stirring frame gear 152, the developing roller gear 155, and the powder feeding roller gear 156 are fixedly connected to the left ends of the stirring frame shaft, the developing roller shaft, and the powder feeding roller shaft, respectively. The input gear 150, the first idler gear 151, the second idler gear 153, and the third idler gear 154 are supported on the left side of the housing 110 via protrusions extending in the left-right direction from the right side of the housing 110. Specifically, the input gear 150, the second idler gear 153, and the third idler gear 154 are supported on the outer surfaces of the boss 113a, the second protrusion 113b, and the third protrusion 113c, respectively, extending in the left-right direction from the left side of the support plate 113. The first idler gear 151 is supported on the outer surface of the first protrusion 111a extending in the left-right direction from the left side of the main body 111.

[0041] In summary, if Figure 6 As shown, the input gear 150 of the developer box 100 receives the driving torque of the imaging device, and the input gear 150 transmits the driving force to the first idler gear 151 and the second idler gear 153 respectively through the processes of Q1 and Q3; the first idler gear 151 transmits the driving force to the stirring frame gear 152 through the process of Q2, so that the stirring frame gear 152 drives the stirring frame to rotate; on the other side, the second idler gear 153 transmits the driving force to the third idler gear 154 through the process of Q4, and the third idler gear 154 transmits the driving force to the powder feeding roller gear 156 and the developing roller gear 155 respectively through the processes of Q5 and Q6, so that the powder feeding roller gear 156 and the developing roller gear 155 respectively drive the powder feeding roller 130 and the developing roller 120 to rotate around their respective axes; through the above simple layout of the gear system, the operation of the developing roller 120 and the powder feeding roller 130 is stable, so as to ensure the imaging quality of the developer box 100.

[0042] Furthermore, in order to ensure the stable transmission of driving force between the gears and no interference in the process of transmitting the driving force, the number of teeth of the gear portion 150a of the driving gear 150 is controlled within 34-50 teeth, the number of teeth of the developing roller gear 155 is controlled within 15-25 teeth, and the number of teeth of the powder feeding roller gear 156 is controlled within 15-25 teeth; preferably, the number of teeth of the gear portion 150a of the driving gear 150 is controlled within 34-42 teeth, the number of teeth of the developing roller gear 155 is controlled within 18-22 teeth, and the number of teeth of the powder feeding roller gear 156 is controlled within 18-25 teeth.

[0043] In one embodiment, the number of teeth of the gear portion 150a of the driving gear 150 is set to 39, the number of teeth of the developing roller gear 155 is set to 22, and the number of teeth of the powder feeding roller gear 156 is set to 18.

[0044] In another embodiment, the number of teeth of the gear portion 150a of the driving gear 150 is set to 42, the number of teeth of the developing roller gear 155 is set to 20, and the number of teeth of the powder feeding roller gear 156 is set to 18.

[0045] In another embodiment, the number of teeth of the gear portion 150a of the driving gear 150 is set to 42, the number of teeth of the developing roller gear 155 is set to 22, and the number of teeth of the powder feeding roller gear 156 is set to 18.

[0046] In another embodiment, the number of teeth of the gear portion 150a of the driving gear 150 is set to 38, the number of teeth of the developing roller gear 155 is set to 22, and the number of teeth of the powder feeding roller gear 156 is set to 18.

[0047] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments can still be modified, or some of the technical features thereof can be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A developing cartridge, comprising: a housing for accommodating a developer, the housing having a first side and a second side separately disposed in a first direction, and a third side and a fourth side separately disposed in a second direction intersecting the first direction; a developing roller, configured to carry a developer, wherein the developing roller is rotatable about a developing roller axis extending in the first direction; a powder feeding roller, for feeding developer to the developing roller, wherein the powder feeding roller is rotatable about an axis of the powder feeding roller extending in the first direction; an input gear for receiving a driving force from outside the developing cartridge and rotatable about an input gear axis extending in the first direction; a developing roller gear, which drives the developing roller to rotate using the driving force transmitted from the input gear; a powder feeding roller gear, which drives the powder feeding roller to rotate using the driving force transmitted from the input gear; It is characterized by further comprising: a first idler gear, capable of receiving a driving force from the input gear; The first idler wheel is meshedly connected with the developing roller gear to transmit driving force to the developing roller gear; The first idler gear is meshed with the powder feeding roller gear to transmit driving force to the powder feeding roller gear.

2. The developing cartridge according to claim 1, wherein Also included is a chip having an electrical contact surface located on the first side of the housing in the first direction and closer to the third side of the housing than to the fourth side of the housing in the second direction.

3. The developing cartridge according to claim 1, wherein: It also includes a second idler gear meshing with the input gear, a plurality of idler gears are arranged between the first idler gear and the second idler gear, and the number of the plurality of idler gears is set to an even number.

4. The developing cartridge according to claim 1, wherein: The invention also includes a stirring frame and a stirring frame gear, wherein a third idler gear is provided between the stirring frame gear and the input gear.

5. The developing cartridge according to claim 4, wherein: The stirring frame gear is rotatable about a stirring frame gear axis extending in the first direction, and the third idler gear is rotatable about a third idler gear axis extending in the first direction; In the second direction, the agitator frame gear axis is closer to the third side of the housing than the third idler gear axis.

6. The developing cartridge according to claim 1, wherein: It also includes a support plate and a second idler wheel meshed with the input gear, the support plate can rotatably support the developing roller and the powder feeding roller, the support plate extends a plurality of support columns in the first direction, and the plurality of support columns are used to rotatably support the first idler wheel and the second idler wheel.

7. The developing cartridge according to claim 1, wherein: The device further includes a second idler gear meshing with the input gear, wherein the input gear has teeth meshingly connected with the second idler gear, wherein the number of the teeth is 34-50.

8. The developing cartridge according to claim 1, wherein: The developing roller gear has teeth meshingly connected with the first idler gear, wherein the number of the teeth is 15-25.

9. The developing cartridge according to claim 1, wherein: The powder feeding roller gear has teeth meshingly connected with the first idler gear, wherein the number of the teeth is 15-25.

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