Developing cartridge

Abstract

The utility model provides a developing box which is detachably mounted to imaging equipment provided with a power output part, and comprises a box body used for accommodating carbon powder; the developing roller is rotatably arranged in the box body and provided with a rotating axis extending in the first direction, and the circumferential outer surface of the developing roller is used for bearing carbon powder; the doctor blade is fixedly arranged on the box body and is in contact with the outer surface of the circumference of the developing roller; the conductive part comprises an electric power receiving part and a first electric power output part which are electrically connected with each other, the electric power receiving part is used for being in contact with the electric power output part to receive electric power from the imaging equipment, and the first electric power output part is in contact with the doctor blade and located between the doctor blade and the box body; according to the scheme, the stability of electric connection between the conductive part and the doctor blade can be improved.

Description

TECHNICAL FIELD

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

[0002] The developing box is a consumable which is detachably installed in an electrophotographic imaging device (hereinafter referred to as "imaging device") such as a laser printer or a laser copier. Generally, the developing box includes a box body, a developing roller, a powder outlet knife, and a power receiving member. The developing roller is rotatably arranged in the box body and used to carry toner accommodated by the box body. The powder outlet knife is fixedly installed on the box body and in contact with the developing roller, and used to adjust the amount of toner on the surface of the developing roller. One end of the power receiving member is connected with the powder outlet knife, and the other end is used to be electrically connected with a power output member in the imaging device.

[0003] Since the powder outlet knife is generally made of metal, the power output by the power output member can be supplied to the powder outlet knife through the power receiving member, and then supplied to the developing roller in contact with the powder outlet knife.

[0004] In the existing design, the power receiving member and the powder outlet knife are in elastic contact. Specifically, the end of the power receiving member used to contact the powder outlet knife is provided with elasticity, or an elastic conductive member is installed between the power receiving member and the powder outlet knife. However, the elasticity of the power receiving member or the elastic member may gradually weaken during the use of the developing box, thereby causing poor contact between the power receiving member and the powder outlet knife. SUMMARY

[0005] Therefore, the utility model provides a developing box adopting the following technical scheme, specifically:

[0006] The developing box is detachably installed in an imaging device provided with a power output member. The developing box includes a box body used to accommodate toner, a developing roller rotatably arranged in the box body and having a rotation axis extending in a first direction, the circumferential outer surface of the developing roller being used to carry toner, a powder outlet knife fixedly installed on the box body and in contact with the circumferential outer surface of the developing roller, and a conductive member including a power receiving part and a first power output part electrically connected with each other. The power receiving part is used to contact the power output member to receive power from the imaging device, and the first power output part is in contact with the powder outlet knife and located between the powder outlet knife and the box body.

[0007] In some embodiments, when viewed in the first direction, the conductive member is located outside the projection range of the powder outlet knife.

[0008] In some embodiments, the developing roller includes a developing roller shaft and a developing layer located radially outside the developing roller shaft, and the conductive member is not in contact with the developing roller shaft.

[0009] In some embodiments, the developing roller shaft is made of a non-conductive material, or an insulating layer is coated on the outer surface of the developing roller shaft.

[0010] In some embodiments, the developing cartridge further comprises a powder feeding roller rotatably arranged in the cartridge body, the conductive member further comprises a second power output portion electrically connected with the power receiving portion, the second power output portion is configured to contact the powder feeding roller.

[0011] In some embodiments, the developing cartridge further comprises a first support fixedly arranged in the cartridge body, the first support is configured to support at least one of the developing roller and the powder feeding roller, and the conductive member is supported by the first support.

[0012] In some embodiments, the developing cartridge further comprises a first support fixedly arranged in the cartridge body, the first support is configured to support at least one of the developing roller and the powder feeding roller, and at least a portion of the first support forms the conductive member.

[0013] In some embodiments, the powder outlet blade comprises a blade holder extending along the first direction and a blade arranged on the blade holder, the blade is configured to contact the circumferential outer surface of the developing roller, the first power output portion is located between the blade holder and the cartridge body, or the first power output portion is located between the blade and the cartridge body.

[0014] In some embodiments, the blade holder comprises a first portion and a second portion connected with each other, an included angle is formed between the first portion and the second portion, the blade is arranged on the first portion, and the powder outlet blade is arranged by fixing at least one of the first portion and the second portion on the cartridge body; the cartridge body has a first surface opposite to the first portion and a second surface opposite to the second portion, the first surface is oriented to intersect the first direction, the second surface is oriented to intersect the first direction, and the first surface is oriented to intersect the second surface; when the powder outlet blade is arranged, the first power output portion is located between the first portion and the first surface, and / or the first power output portion is located between the second portion and the second surface.

[0015] In some embodiments, the blade holder is formed as a sheet extending along the first direction, the cartridge body has a first surface opposite to the sheet and a second surface adjacent to the first surface, the first surface is oriented to intersect the first direction, the second surface is oriented to intersect the first direction, and the first surface is oriented to intersect the second surface; when the powder outlet blade is arranged, the sheet is opposite to the first surface and not opposite to the second surface, and the first power output portion is located between the sheet and the first surface. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a perspective view of the developing cartridge according to the first embodiment of the present application.

[0017] Figure 2is a partial exploded view of the developing cartridge according to the first embodiment of the present application.

[0018] Figure 3 is a side view of the developing cartridge according to the first embodiment of the present application, viewed along the first direction.

[0019] Figure 4 is a side view of the developing cartridge according to the second embodiment of the present application, viewed along the first direction.

[0020] Figure 5 is a perspective view of another first support according to the present application. DETAILED DESCRIPTION

[0021] Embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0022] [Structure of the developing cartridge]

[0023] As shown in Figure 1 , the developing cartridge 100 includes a cartridge body 1, a developing roller 21 rotatably provided in the cartridge body 1 for carrying toner accommodated in the cartridge body 1, and a powder outlet blade 3 fixedly installed on the cartridge body 1 for adjusting the thickness of the toner layer on the surface of the developing roller 21, the direction in which the rotation axis L of the developing roller 21 lies being the first direction / longitudinal direction; the developing cartridge 1 can be detachably installed to an image forming apparatus provided with a power output, or can be first installed to a drum cartridge provided with a photosensitive drum to form a process cartridge, and then the process cartridge is detachably installed to the image forming apparatus, when the developing cartridge 100 performs image formation in the image forming apparatus, the power output outputs power to the developing cartridge 1, and the power is supplied to the developing roller 21.

[0024] Further, the developing cartridge 100 further includes a conductive member 4, when the developing cartridge 100 is in a posture of being installed to a predetermined position of the image forming apparatus, the conductive member 4 forms an electrical connection with the power output, so that the power output by the power output can be supplied to the developing roller 21 through the conductive member 4; the predetermined position refers to a position at which the developing cartridge 100 can perform image formation in the image forming apparatus.

[0025] As shown in Figure 2As shown, in some embodiments, the developing cartridge 100 further comprises a powder feeding roller 22 rotatably arranged in the cartridge body 1, the powder feeding roller 22 is in contact with the developing roller 21 for supplying the toner accommodated in the cartridge body 1 to the developing roller 21; wherein the developing roller 21 comprises a developing roller shaft 212 and a developing layer 211, the developing layer 211 is located radially outside the developing roller shaft 212, thus the circumferential outer surface of the developing layer 211 is the circumferential outer surface of the developing roller 21, the toner is carried by the circumferential outer surface of the developing layer 211, the powder feeding roller 22 comprises a powder feeding roller shaft 222 and a powder feeding layer 221, the powder feeding layer 221 is located radially outside the powder feeding roller shaft 222, the powder feeding layer 221 is in contact with the developing layer 211 to supply the toner to the developing layer 211.

[0026] In some embodiments, the developing roller shaft 212 is made of non-conductive material, but the developing layer 211 is made of conductive material, when the developing cartridge 100 performs imaging, the developing roller 21 does not have to receive power through the developing roller shaft 212, but directly receives power through the developing layer 211, which is conducive to reducing the material cost of the developing roller 21 and reducing the loss of power conduction in the developing roller 21.

[0027] In some embodiments, an insulating layer can also be arranged between the developing roller shaft 212 and the developing layer 211, or in other words, the outer surface of the developing roller shaft 212 is covered with an insulating layer, to achieve the purpose of directly receiving power by the developing layer 211, thereby reducing the loss of power conduction in the developing roller 221, at this time, the material of the developing roller shaft 211 can not be limited; the insulating layer can be, for example, an insulating sleeve, an insulating sheet, etc. located between the developing roller shaft 212 and the developing layer 211, or an insulating coating coated on the outer surface of the developing roller shaft 212.

[0028] In some embodiments, the developing cartridge 100 further comprises a first support 13 fixedly arranged relative to the cartridge body 1, for example, the first support 13 is fixedly installed on the cartridge body 1, at least one of the developing roller 21 and the powder feeding roller 22 is supported by the first support 13, specifically, at least one of the developing roller shaft 212 and the powder feeding roller shaft 222 is supported by the first support 13, along the first direction, the conductive member 4 and the first support 13 are located on the same side of the cartridge body 1, preferably, the conductive member 4 is supported by the first support 13.

[0029] In some embodiments, the developing cartridge 100 further comprises a second support 15 fixedly arranged relative to the cartridge body 1, along the first direction, the first support 13 and the second support 15 are respectively located at both ends of the cartridge body 1, at least one of the developing roller 21 and the powder feeding roller 22 is supported by the second support 15, specifically, at least one of the developing roller shaft 212 and the powder feeding roller shaft 222 is supported by the second support 15.

[0030] In some embodiments, the developing cartridge 100 further comprises a driving force receiving and transferring assembly 16 for receiving a driving force from the image forming device and transferring the driving force to the developing roller 21 and the powder feeding roller 22.

[0031] In some embodiments, the developing cartridge 100 further comprises a counting assembly 14 for interacting with a counted part in the image forming device, so that the image forming device can learn the parameter information such as the model, service life, etc. of the developing cartridge 100; along the first direction, the counting assembly 14 and the driving force receiving and transferring assembly 16 can be located at both ends of the cartridge body 1 respectively, or at the same end of the cartridge body 1.

[0032] In some embodiments, the developing cartridge 100 further comprises a first end cover 11 fixedly connected with the cartridge body 1, the first end cover 11 being used for covering at least a part of the driving force receiving and transferring assembly 16, when the counting assembly 14 and the driving force receiving and transferring assembly 16 are located at the same end of the cartridge body 1, the first end cover 11 is also used for covering at least a part of the counting assembly 14.

[0033] In some embodiments, the developing cartridge 100 further comprises a second end cover 12 fixedly connected with the cartridge body 1, along the first direction, the first end cover 11 and the second end cover 12 are located at both ends of the cartridge body 1 respectively, the second end cover 12 being used for protecting the components arranged on the same side of the second end cover 12, when the counting assembly 14 and the driving force receiving and transferring assembly 16 are located at both ends of the cartridge body 1 respectively, the second end cover 12 covers at least a part of the counting assembly 14.

[0034] In some embodiments, the developing cartridge 100 further comprises a chip with an electrical contact, when the developing cartridge 100 reaches a predetermined position, the electrical contact contacts a stylus in the image forming device, so that the developing cartridge 100 establishes a communication connection with the image forming device.

[0035] [powder outlet knife]

[0036] As shown in Figure 1 and Figure 2 , the powder outlet knife 3 comprises a knife holder 31 and a knife blade 32, the knife holder 31 extends along the first direction and is fixed on the cartridge body 1, the knife blade 32 also extends along the first direction and is arranged on the knife holder 31, for example, a part of the knife blade 32 is fixed to the knife holder 32 in a manner of welding, bonding, etc., the knife blade 32 is used for contacting the circumferential outer surface of the developing roller 21 / developing layer 211, so as to adjust the thickness of the carbon powder layer of the circumferential outer surface of the developing roller 21.

[0037] In some embodiments, the blade holder 31 comprises a first part 311 and a second part 312 connected to each other, the blade 32 is arranged on the first part 312, and the first part 311 and the second part 312 are arranged in a non-parallel manner, that is, an included angle is formed between the first part 311 and the second part 312, and the powder outletting blade 3 can be installed by fixing at least one of the first part 311 and the second part 312 to the box body 1, for example, the powder outletting blade 3 is installed by means of screws, buckles, adhesion, magnetic connection, etc.

[0038] In some embodiments, the box body 1 has a first surface 1a opposite to the first part 311 and a second surface 1b opposite to the second part 312, the direction of the first surface 1a and the direction of the second surface 1b are both intersected with the first direction, and the direction of the first surface 1a and the direction of the second surface 1b are also intersected, preferably, the direction of the first surface 1a, the direction of the second surface 1b and the first direction are perpendicular to each other, more preferably, the first surface 1a and the second surface 1b are arranged adjacent to each other; when the powder outletting blade 3 is installed, the first part 311 is in contact with the first surface 1a, and / or the second part 312 is in contact with the second surface 1b.

[0039] The structure of the powder outletting blade 3 and the developing roller 21 receiving power from the image forming device in the present application is described below.

[0040] (Example one)

[0041] Continuing as Figure 2 shown, the conductive part 4 is made of conductive material, for example, the conductive part 4 is formed in the shape of a conductive sheet, a conductive wire, etc., the conductive part 4 comprises a power receiving part 41 and a first power output part 42 electrically connected to each other, wherein the power receiving part 41 is used to contact the power output part to receive power from the image forming device, and the first power output part 42 is used to contact the powder outletting blade 3 to transmit the power received by the power receiving part 41 to the powder outletting blade 3, as described above, since the powder outletting blade 3 / blade 32 is in contact with the circumferential outer surface of the developing roller 21, the developing roller 21 can also receive the power.

[0042] As Figure 3 shown, when viewed along the first direction, the conductive part 4 is located outside the projection range of the powder outletting blade 3, which can avoid the interaction between the conductive part 4 and the powder outletting blade 3 in the first direction to affect the power transmission of the conductive part 4 to the powder outletting blade 3.

[0043] Further, when viewed along the first direction, the conductive member 4 is located outside the projection range of the developing roller 2, and the influence of the vibration generated when the developing roller 2 rotates on the conductive member 4 can be reduced; the first power output portion 42 is located between the second portion 312 and the second surface 1b, or in other words, the first power output portion 42 is clamped between the second portion 312 and the second surface 1b, and when the powder outlet blade 3 is fixed to the box body 1, especially when the powder outlet blade 3 is fixed to the box body 1 through the second portion 312, a stable electrical connection can be formed between the first power output portion 42 and the powder outlet blade 3 / second portion 312, and there is no need to worry about the problem of elastic fatigue of the first power output portion 42.

[0044] In some embodiments, the conductive member 4 further comprises a second power output portion 43 different from the first power output portion 42, the second power output portion 43 is electrically connected with the power receiving portion 41, and is used to contact the powder feeding roller shaft 222, so that the power received by the power receiving portion 41 can also be supplied to the powder feeding roller 22 through the second power output portion 43.

[0045] (Example Two)

[0046] As shown in Figure 4 Compared with Example One, the difference between the present example is that the first power output portion 42 is located between the first portion 311 and the first surface 1a, or in other words, the first power output portion 42 is clamped between the first portion 311 and the first surface 1a, and when the powder outlet blade 3 is fixed to the box body 1, especially when the powder outlet blade 3 is fixed to the box body 1 through the first portion 311, a stable electrical connection can be formed between the first power output portion 42 and the powder outlet blade 3 / first portion 311, and there is no need to worry about the problem of elastic fatigue of the first power output portion 42.

[0047] In some embodiments, the second portion 312 can also not be necessarily provided, that is, the powder outlet blade 3 / blade holder 31 is fixed to the box body 1 through the first portion 311, at this time, the blade holder 31 will form a sheet-shaped body extending along the first direction, and the sheet-shaped body 31 is opposite to the first surface 1a and not opposite to the second surface 1b, and the first power output portion 42 will be located between the sheet-shaped body 31 and the first surface 1a / box body 1.

[0048] (Example Three)

[0049] In the present example, at least a part of the first bracket 13 is made of a conductive material, as shown in Figure 5As shown, the first support 13 includes a support body 131 and a first power output part 42, a part of the support body 131 forms the power receiving part 41, thus, at least a part of the first support 13 can be regarded as the conductive part 4, or at least a part of the first support forms the conductive part 4, the support body 131 is used for supporting at least one of the developing roller 21 and the powder feeding roller 22, and the first power output part 42 is connected with the support body 131.

[0050] Specifically, the first power output part 42 can also be located between the first part 311 and the first surface 1a, or the first power output part 42 can also be located between the second part 312 and the second surface 1b, finally, the power received by the power receiving part 41 from the power output part can be transmitted to the first power output part 42 through the support body 131, transmitted to the powder outlet blade 3 by the first power output part 42, and then transmitted to the developing roller 21 by the powder outlet blade 3.

[0051] It should be noted that for the first support 13 in the embodiment, when viewed in the first direction, the power receiving part 41, the first power output part 42, and the part of the support body 131 for electrically connecting the power receiving part 41 and the first power output part 42 are all located outside the projection range of the powder outlet blade 3; further, when the developing roller 21 is supported by the support body 131, when viewed in the first direction, the power receiving part 41, the first power output part 42, and the part of the support body 131 for electrically connecting the power receiving part 41 and the first power output part 42 are all located outside the projection range of the developing roller 21.

[0052] In addition, the first support 13 in the embodiment can also be provided with the second power output part 43, so that the powder feeding roller 22 can also receive power.

[0053] [Advantages]

[0054] According to the above description, the technical scheme of the utility model can produce the following advantages:

[0055] 1. The conductive part 4 does not contact the developing roller shaft 212, and the developing roller 21 directly receives power through the developing layer 211, so that the power loss of the developing roller 21 can be reduced when the developing cartridge 100 is imaging.

[0056] 2. According to the first item, the developing roller shaft 212 can be made of a non-conductive material, which is conducive to reducing the cost of the developing roller 21.

[0057] 3. According to the first item, a non-conductive layer can also be arranged between the developing roller shaft 212 and the developing layer 211, at this time, the material of the developing roller shaft 212 can not be limited, which is conducive to improving the design freedom of the developing roller 21.

[0058] 4. The first power output portion 42 is arranged between the powder outlet knife 3 and the box body 1 and is in contact with the powder outlet knife 3 without abutting against the end of the powder outlet knife 42, so that the first power output portion 42 does not have to be arranged to be elastic, and the first power output portion 42 can be prevented from being weakened in elasticity during long-term use, thereby causing the first power output portion 42 to be in poor contact with the powder outlet knife 3.

[0059] 5. The conductive member 4 is located outside the projection range of the powder outlet knife 3 when viewed in the first direction, so that the conductive member 4 and the powder outlet knife 3 can be prevented from being in an interaction relationship of generating an electric field in the first direction, thereby affecting the power transmission of the conductive member 4 to the powder outlet knife 3.

[0060] 6. The conductive member 4 is located outside the projection range of the developing roller 21 when viewed in the first direction, so that the influence of the vibration generated by the rotation of the developing roller 21 on the conductive member 4 can be reduced.

[0061] 7. According to the inventive concept of the present application, the first power output portion 42 can be arranged between the knife holder 31 and the box body 1 or between the knife blade 32 and the box body 1, as long as the first power output portion 42 can transmit the power received by the power receiving portion 41 to the powder outlet knife 3.

Claims

1. A developing cartridge, detachably mounted to an imaging device equipped with a power output component, characterized in that, The developing cartridge includes: The housing is used to hold the toner. The developing roller is rotatably disposed in the cartridge and has a rotation axis extending in a first direction, the outer circumferential surface of which is used to hold toner. The powder discharge blade is fixedly installed on the cartridge body and contacts the outer circumferential surface of the developing roller; The conductive component includes a power receiving part and a first power output part that are electrically connected to each other. The power receiving part is used to contact the power output part to receive power from the imaging device, and the first power output part is in contact with the powder dispensing blade and is located between the powder dispensing blade and the cartridge body.

2. The developing cartridge according to claim 1, characterized in that, When viewed along the first direction, the conductive element is located outside the projection range of the powder discharge blade.

3. The developing cartridge according to claim 1, characterized in that, The developing roller includes a developing roller shaft and a developing layer. The developing layer is located on the radially outer side of the developing roller shaft, and the conductive parts are not in contact with the developing roller shaft.

4. The developing cartridge according to claim 3, characterized in that, The developing roller is made of a non-conductive material, or the outer surface of the developing roller is covered with an insulating layer.

5. The developing cartridge according to claim 1, characterized in that, The developing cartridge also includes a powder feeding roller rotatably disposed in the cartridge body, and the conductive element further includes a second power output unit electrically connected to the power receiving unit, the second power output unit being used to contact the powder feeding roller.

6. The developing cartridge according to claim 5, characterized in that, The developing cartridge also includes a first bracket fixedly mounted on the cartridge body, the first bracket being used to support at least one of the developing roller and the powder feeding roller, and the conductive component being supported by the first bracket.

7. The developing cartridge according to claim 5, characterized in that, The developing cartridge also includes a first bracket fixedly mounted on the cartridge body, the first bracket being used to support at least one of the developing roller and the powder feeding roller, and at least a portion of the first bracket forming a conductive element.

8. The developing cartridge according to any one of claims 1-7, characterized in that, The powder ejector includes a blade holder and a blade extending in a first direction. The blade holder is fixed to the cartridge body, and the blade is disposed on the blade holder. The blade is used to contact the outer circumferential surface of the developing roller. A first power output unit is located between the blade holder and the cartridge body, or the first power output unit is located between the blade and the cartridge body.

9. The developing cartridge according to claim 8, characterized in that, The blade holder includes a first part and a second part that are connected to each other, forming an angle between the first part and the second part. The blade is disposed on the first part, and the powder dispensing blade is installed by fixing at least one of the first part and the second part to the box body. The box has a first surface opposite to the first part and a second surface opposite to the second part. The orientation of the first surface and the orientation of the second surface both intersect with the first direction, and the orientation of the first surface also intersects with the orientation of the second surface. When the powder discharge blade is installed, the first power output is located between the first portion and the first surface, and / or the first power output is located between the second portion and the second surface.

10. The developing cartridge according to claim 8, characterized in that, The tool holder is formed as a sheet extending along a first direction. The box has a first surface opposite to the sheet and a second surface adjacent to the first surface. The orientation of the first surface and the orientation of the second surface both intersect the first direction, and the orientation of the first surface also intersects the orientation of the second surface. When the powder discharge blade is installed, the sheet-like body is opposite to the first surface but not to the second surface, and the first power output section is located between the sheet-like body and the first surface.

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