Developing cartridge

Abstract

The utility model relates to a developing box detachably mounted in imaging equipment, which comprises a developing shell used for accommodating carbon powder; the developing roller is rotatably arranged in the developing shell and used for bearing carbon powder, and the extending direction of the rotating axis of the developing roller is the longitudinal direction; the bracket is arranged at the longitudinal tail end of the developing shell and is at least used for supporting the developing roller; the bracket can move relative to the developing shell; the design can ensure the imaging quality.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of electrophotographic imaging, especially relates to a developing box which can be detachably installed to an imaging device. BACKGROUND

[0002] The developing box can be detachably installed to an electrophotographic imaging device (hereinafter referred to as "imaging device") and comprises a developing shell for accommodating carbon powder and a developing roller rotatably arranged in the developing shell. The developing roller is used for carrying the carbon powder. The developing roller is usually supported and positioned by a first end cover, a second end cover or a bracket in the developing box. When the developing box performs an imaging operation, the developing roller can rotate at a predetermined position, which refers to a position at which the developing box can normally perform imaging.

[0003] In the prior art, production errors may occur during the production of parts, or assembly errors may occur during the assembly of the developing box, which causes the positioning of the developing roller to deviate. As a result, when the developing box performs an imaging operation, the developing roller cannot rotate at the predetermined position, thereby affecting the imaging quality. SUMMARY

[0004] The utility model provides a developing box adopting the following technical scheme to solve the above technical problems, and the specific scheme is as follows:

[0005] The developing box can be detachably installed to an imaging device. The developing box comprises a developing shell for accommodating carbon powder, a developing roller rotatably arranged in the developing shell for carrying the carbon powder, and a bracket arranged at a longitudinal end of the developing shell and used for supporting the developing roller. The bracket is movable relative to the developing shell.

[0006] Further, the developing box further comprises a driving device arranged at the longitudinal end of the developing shell. The driving device is used for receiving a driving force from outside the developing box and transmitting the driving force to other components in the developing box. In the longitudinal direction, one end of the developing device is a driving end, and the side opposite to the driving end is a non-driving end. The bracket is arranged at the non-driving end.

[0007] Further, the developing box comprises a second end cover arranged at the non-driving end. The second end cover is fixedly connected with the developing shell. The second end cover has a first positioning portion and a second positioning portion formed thereon. The first positioning portion and the second positioning portion are used for cooperating with the bracket.

[0008] Further, the bracket has a first positioned portion and a second positioned portion formed thereon. The first positioned portion is used for cooperating with the first positioning portion, and the second positioned portion is used for cooperating with the second positioning portion.

[0009] Further, the support is rotatable around the first positioning part.

[0010] Further, the second positioning part is provided as a protruding part, the second positioning part has an outer wall, an arc surface and a cross section formed on the outer wall, a bending part is formed between the arc surface and the cross section, the second end cover and the support are projected on a horizontal plane perpendicular to the longitudinal direction, and the distance between the bending part and the inner wall of the second positioning part is 0.2mm-0.5mm when viewed in the longitudinal direction.

[0011] Further, the support further has a supporting part formed thereon, the supporting part is used for cooperating with the developing roller to support the developing roller.

[0012] Further, the developing cartridge further comprises a photosensitive drum, and the developing roller is used for supplying the carbon powder to the photosensitive drum to develop an electrostatic latent image formed on the surface of the photosensitive drum. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 is a perspective view of the developing cartridge.

[0014] Figure 2 is a sectional view along the direction of A-A in the figure. Figure 1

[0015] Figure 3 is a schematic view of the second end cover.

[0016] Figure 4 is a schematic view of the support.

[0017] Figure 5 is a schematic view of the second end cover and the support when combined. DETAILED DESCRIPTION

[0018] The structure of the developing cartridge and other aspects of the present application will be further described in detail below with reference to the specific embodiments and the accompanying drawings.

[0019] The developing cartridge 100 can be detachably installed to an electrophotographic image forming apparatus (hereinafter referred to as “image forming apparatus”) such as a laser printer. Figure 1 As shown, the developing cartridge 100 comprises a developing housing 1 and a developing roller 11 rotatably arranged in the developing housing 1, the developing housing 1 comprises a first housing 1a and a second housing 1b combined with each other, a carbon powder accommodating cavity 1c for accommodating carbon powder is formed between the first housing 1a and the second housing 1b, the developing roller 11 is used for carrying carbon powder and supplying the carbon powder to a photosensitive drum arranged outside the developing cartridge 100 to develop an electrostatic latent image formed on the surface of the photosensitive drum, and the extending direction of the rotation axis L of the developing roller 11 is the longitudinal direction.

[0020] As shown, the developing cartridge 100 comprises a developing housing 1 and a developing roller 11 rotatably arranged in the developing housing 1, the developing housing 1 comprises a first housing 1a and a second housing 1b combined with each other, a carbon powder accommodating cavity 1c for accommodating carbon powder is formed between the first housing 1a and the second housing 1b, the developing roller 11 is used for carrying carbon powder and supplying the carbon powder to a photosensitive drum arranged outside the developing cartridge 100 to develop an electrostatic latent image formed on the surface of the photosensitive drum, and the extending direction of the rotation axis L of the developing roller 11 is the longitudinal direction. Figure 1 ​As shown in

[0021] In some embodiments, the developing cartridge 100 can further comprise a photosensitive unit, the photosensitive unit comprising a photosensitive housing and a photosensitive drum rotatably arranged in the photosensitive housing, the developing roller 11 being configured to supply toner to the photosensitive drum.

[0022] As shown in Figure 1 and Figure 4 The developing cartridge 100 comprises a bracket 13 arranged at the longitudinal end of the developing housing 1, the bracket 13 being movable relative to the developing housing 1 and being configured to support at least the developing roller 11, in particular, the bracket 13 is arranged at the non-driving end F, the bracket 13 having a bracket body 130 and a support portion 131 formed on the bracket body 130, the support portion 131 being configured to cooperate with the developing roller 11 to support the developing roller 11, the bracket 13 further having a first positioning portion 132 and a second positioning portion 133 formed on the bracket body 130, the first positioning portion 132 and the second positioning portion 133 being configured to cooperate with the second end cover 14 to position the bracket 13.

[0023] As shown in Figure 3 and Figure 5As shown, the second end cover 15 has a second end cover body 150, and a first positioning part 151 and a second positioning part 152 formed on the second end cover body 150, the first positioning part 151 is used for cooperating with the first positioned part 132, so that the bracket 13 can rotate around the first positioning part 151, the second positioning part 152 is used for cooperating with the second positioned part 133 to limit the activity space of the bracket 13, in particular, the second positioning part 152 is provided as a protruding part, and the second positioned part 133 is preferably a groove or a hole, the second positioning part 152 has an outer wall 153, and an arc surface 154 and a cross section 155 formed on the outer wall 153, the arc surface 154 and the cross section 155 form a bending part 156 between them, the developing cartridge 100 is projected on a plane perpendicular to the longitudinal direction, and the developing roller 11 can rotate around the first positioning part 151 within the range of 0.2mm-0.5mm between the bending part 156 and the inner wall 134 of the second positioned part 133, so that the bracket 13 can rotate around the first positioning part 151, and the developing roller 11 can also rotate around the first positioning part 151 due to the cooperation of the developing roller 11 and the supporting part 131, and the developing roller 11 can automatically adjust the position to a predetermined position during the developing work of the developing cartridge 100, the predetermined position refers to the position at which the developing cartridge 100 can normally perform imaging, and the developing roller 11 cannot be kept at the predetermined position due to the production error of the developing roller 11 itself, or the production error of the first end cover 14, the second end cover 15 and the bracket 13 and other parts in the developing cartridge 100 for supporting and positioning the developing roller 11, or the assembly error during the assembly of the developing cartridge 100, thereby improving the imaging quality.

[0024] In some embodiments, the second positioned part 133 can also be provided as a protruding part, and the second positioning part 152 can be provided as a groove or a hole.

[0025] In some embodiments, since the driving end D receives the driving force from the outside of the developing cartridge 100, and the non-driving end F does not receive the driving force from the outside of the developing cartridge 100, the developing housing 1 will be distorted during the developing work of the developing cartridge 100, so that the developing roller 11 deviates from the predetermined position, and by providing the bracket 13 which is movable relative to the developing housing 1, the developing roller 11 can automatically adjust the position to the predetermined position during the developing work of the developing cartridge 100, thereby ensuring the imaging quality.

[0026] As described above, in the utility model, the bracket 13 is used for supporting the developing roller 11, and the bracket 13 is movable relative to the developing housing 1, so that the developing roller 11 can move to the predetermined position during the developing work of the developing cartridge 100, thereby ensuring the imaging quality.

Claims

1. A process cartridge detachably mountable to an image forming apparatus, characterized by comprising: The developing cartridge comprises: a developing housing for accommodating toner; a developing roller rotatably arranged in the developing housing for carrying the toner, an extending direction of a rotation axis of the developing roller being a longitudinal direction; a bracket arranged at a longitudinal end of the developing housing for supporting at least the developing roller; the bracket is movable relative to the developing housing.

2. The process cartridge according to claim 1, wherein, The developing cartridge further comprises a driving device arranged at the longitudinal end of the developing housing, the driving device being configured to receive a driving force from outside the developing cartridge and transmit the driving force to the developing roller; in the longitudinal direction, one end of the developing cartridge where the driving device is arranged is a driving end, and an opposite side of the driving end is a non-driving end; the bracket is arranged at the non-driving end.

3. The process cartridge of claim 2 wherein, The developing cartridge comprises a second end cover arranged at the non-driving end, the second end cover being fixedly connected with the developing housing, the second end cover having a first positioning portion and a second positioning portion formed thereon, the first positioning portion and the second positioning portion being configured to cooperate with the bracket.

4. The process cartridge of claim 3 wherein, the bracket has a first positioned portion and a second positioned portion formed thereon, the first positioned portion being configured to cooperate with the first positioning portion, and the second positioned portion being configured to cooperate with the second positioning portion.

5. The process cartridge of claim 4 wherein, the bracket is rotatable about the first positioning portion.

6. The process cartridge of claim 5 wherein, the second positioning portion is arranged as a protruding portion, the second positioning portion having an outer wall, and an arc surface and a cross section formed on the outer wall, a bending portion being formed between the arc surface and the cross section; projecting the second end cover and the bracket on a horizontal plane perpendicular to the longitudinal direction, and observing in the longitudinal direction, a distance between the bending portion and an inner wall of the second positioned portion is 0.2mm-0.5mm.

7. The process cartridge of claim 1, wherein, the bracket further has a supporting portion formed thereon, the supporting portion being configured to cooperate with the developing roller to support the developing roller.

8. The process cartridge according to any one of claims 1-7 wherein, the developing cartridge further comprises a photosensitive drum, the developing roller being configured to supply toner to the photosensitive drum to develop an electrostatic latent image formed on a surface of the photosensitive drum.

Images