Developing cartridge

Abstract

The developing box comprises a developing shell, a powder feeding roller and a developing roller, the powder feeding roller and the developing roller are rotatably mounted on the developing shell, the developing shell is used for accommodating a developing agent, the powder feeding roller is used for conveying the developing agent to the surface of the developing roller, and the developing roller is used for conveying the developing agent to the outside of the developing box; the developing roller can rotate around a first rotating axis parallel to the left-right direction, and the powder feeding roller rotates around a second rotating axis parallel to the first rotating axis; the developing shell is further provided with a fixing face used for installing a doctor blade for adjusting the thickness of a developing agent on the surface of the developing roller, and a first straight line passing through the first rotating axis and the second rotating axis intersects with a second straight line parallel to the fixing face when observed in the left-right direction. The angle range of a first included angle between the first straight line and the second straight line is 60-70 degrees; therefore, after the doctor blade is mounted on the mounting part, the cut-in amount of the blade and the surface of the developing roller is increased, the developing agent on the surface of the developing roller is thinned, the powder consumption during imaging of the developing box is reduced, and the page yield is improved.

Description

Technical Field

[0001] This utility model relates to the field of electrophotographic imaging technology, and in particular to a developing cartridge that can be detachably installed in an electrophotographic imaging device. Background Technology

[0002] The developing cartridge is a consumable that can be detachably installed into an imaging device. The developing cartridge includes a developing housing and a powder delivery roller and a developing roller that are detachably installed in the developing housing. The developing housing is used to contain the developer, the powder delivery roller is used to deliver the developer to the surface of the developing roller, and the developing roller is used to deliver the developer to the outside of the developing cartridge for imaging.

[0003] The developing cartridge also includes a powder discharge blade that contacts the surface of the developing roller to adjust the thickness of the developer on the surface of the developing roller. How to effectively control the thickness of the developer without affecting the imaging quality, and keep the torque of the developing cartridge within a suitable range, is a direction that technicians need to consider in their research and development. Utility Model Content

[0004] The developing cartridge provided by this utility model can solve at least one of the above-mentioned technical problems. The specific technical solution is as follows:

[0005] A developing cartridge includes a developing housing and a powder feeding roller and a developing roller rotatably mounted to the developing housing. The developing housing is used to contain developer, the powder feeding roller is used to deliver developer to the surface of the developing roller, and the developing roller is used to deliver developer to the outside of the developing cartridge. The developing roller is rotatable about a first rotation axis parallel to the left-right direction, and the powder feeding roller is rotatable about a second rotation axis parallel to the first rotation axis.

[0006] The developing housing is also provided with a fixed surface for mounting a powder discharge knife that adjusts the thickness of the developer on the surface of the developing roller. When viewed from the left and right direction, a first straight line passing through the first axis of rotation and the second axis of rotation intersects with a second straight line parallel to the fixed surface, and the angle between the first straight line and the second straight line is in the range of 60° to 70°.

[0007] The first included angle is set to 63.5°.

[0008] The direction intersecting the left and right directions is the front and back direction. At least a portion of the developing roller is located in front of the powder feeding roller. The direction intersecting the left and right directions and the front and back directions is the up and down direction. The developing box is projected along the left and right directions onto a plane perpendicular to the left and right directions. Along the top-down direction, the distance between the fixed surface and the first rotation axis of the developing roller gradually decreases.

[0009] The developing cartridge can be detachably installed into an imaging device equipped with a stylus. The developing cartridge also includes a chip for storing its parameter information. The chip is fixedly mounted on the developing housing. The chip includes a substrate and at least one electrical contact. The substrate has a first surface, and the electrical contact is disposed on the first surface. The electrical contact is used to electrically connect with the stylus, so that a communication connection can be formed between the developing cartridge and the imaging device. When viewed in a left-right direction, a third straight line parallel to the first surface intersects the second straight line, and the angle between the third straight line and the second straight line ranges from 55° to 65°.

[0010] The second included angle is set to 60°.

[0011] The powder-discharging blade includes a blade holder and a blade. The blade holder includes a first side plate and a second side plate connected to each other. The first side plate is bent relative to the second side plate. The second side plate is supported by the developing housing and is provided with a mounting hole. The blade is mounted on the second side plate and is used to contact the surface of the developing roller to adjust the developer thickness on the surface of the developing roller. The developing cartridge also includes a fixing member and at least two mounting portions integrally formed with the developing housing. The mounting portion includes a main body with a fixing portion. The fixing portion is provided with a fixing groove with an opening located on the fixing surface. The fixing member passes through the mounting hole and enters the fixing groove, thereby fixing the powder-discharging blade.

[0012] The mounting part also includes a positioning part disposed on the main body, and the first side plate is provided with a positioning part for cooperating with the positioning part.

[0013] The developing chamber also includes a buffer to prevent developer leakage, and the developing housing or second side plate has a mounting surface for mounting the buffer, the mounting surface being parallel to the fixing surface.

[0014] Compared with the prior art, the mounting surface of the developing cartridge provided by this utility model is inclined. Specifically, when viewed along the left and right direction, a first straight line passing through the first and second rotation axes and a second straight line parallel to the mounting surface / second side plate intersect, and the angle between the first and second straight lines is in the range of 60° to 70°. With this setting, after the powder knife is installed in the mounting part, the cutting depth between the blade and the surface of the developing roller increases, the developer on the surface of the developing roller becomes thinner, the powder consumption during imaging in the developing cartridge is reduced, the page yield is increased, and thus the service life of the developing cartridge can be extended, and the user's operating cost is reduced. Attached Figure Description

[0015] Figure 1 This is a perspective view of the developing cartridge involved in this utility model.

[0016] Figure 2 This utility model relates to a developing cartridge edge Figure 1Plan view after sectioning along the AA direction.

[0017] Figure 3 This is a perspective view of the powder ejector blade of the developing cartridge involved in this utility model.

[0018] Figure 4 This is a perspective view of the location of the fixing surface of the developing cartridge before the toner ejector blade is installed.

[0019] Figure 5 yes Figure 4 Plan view after sectioning along the BB direction.

[0020] Figure 6 This is a plan view of the developing cartridge involved in this utility model, viewed from left to right. Detailed Implementation

[0021] The embodiments of this utility model are described in detail below with reference to the accompanying drawings.

[0022] Figure 1 This is a perspective view of the developing cartridge involved in this utility model; Figure 2 This utility model relates to a developing cartridge edge Figure 1 Plan view after sectioning along the AA direction.

[0023] The developing cartridge 100 can be detachably installed into an imaging device equipped with a stylus, such as... Figure 1 and Figure 2 As shown, the developing cartridge 100 includes a developing housing 10 and a developing roller 20 and a powder feeding roller 30 rotatably disposed in the developing housing 10. The developing housing 10 is used to contain developer, the powder feeding roller 30 is used to transport developer to the developing roller 20, and the developing roller 20 is used to transport developer to the outside of the developing cartridge 100 for imaging by an imaging device.

[0024] The developing roller 20 rotates around the first rotation axis L1, and the powder feeding roller 30 rotates around the second rotation axis L2. The first rotation axis L1 and the second rotation axis L2 are parallel to each other. For ease of description and understanding below, the direction parallel to the first rotation axis L1 is defined as the left-right direction, and the direction intersecting the left-right direction is defined as the front-back direction. At least a part of the developing roller 20 is located in front of the powder feeding roller 30, and the direction intersecting the left-right direction and the front-back direction is defined as the up-down direction. Preferably, the left-right direction, the front-back direction, and the up-down direction are orthogonal to each other.

[0025] like Figure 1As shown, the developing cartridge 100 includes an end cap 12 detachably connected to the developing housing 10. The end cap 12 is located at one of the left or right ends of the developing housing 10. The developing cartridge 100 also includes a chip component 40 for storing developing cartridge parameter information. The chip component 40 is fixedly mounted on the developing housing 10 or the end cap 12 relative to the developing housing 10. The chip component 40 includes a chip 41 and a chip support 42. The chip 41 is used to store the parameter information of the developing cartridge 100 and is mounted on the chip support 42. The chip 41 includes a substrate 411 and at least one electrical contact 412. The substrate 411 has a first surface 413, and the electrical contact 412 is disposed on the first surface 413. The electrical contact 412 is used to electrically connect with the contact pin of the imaging device, so that a communication connection can be formed between the developing cartridge 100 and the imaging device.

[0026] Figure 3 This is a perspective view of the powder ejector blade of the developing cartridge involved in this utility model; Figure 4 This is a perspective view of the location of the fixing surface of the developing cartridge before the toner ejector blade is installed.

[0027] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the developing cartridge 100 also includes a powder discharge blade 50 for adjusting the developer thickness on the surface of the developing roller 20. The powder discharge blade 50 is detachably mounted on the developing housing 10. The powder discharge blade 50 includes a blade holder 51 and a blade 52. The blade holder 51 includes a first side plate 511 and a second side plate 512 connected to each other. An angle is formed between the first side plate 511 and the second side plate 512, or in other words, the second side plate 512 is bent relative to the first side plate 511. The first side plate 511 is used for positioning, and the second side plate 512 is supported by the developing housing 10. The blade 52 is mounted on the second side plate 512 and is used to contact the surface of the developing roller 20 to adjust the developer thickness on the surface of the developing roller 20.

[0028] The developing cartridge 100 also includes a buffer 53 for preventing developer leakage. After the powder dispensing blade 50 and the buffer 53 are both installed in the developing housing 10, the buffer 53 is located between the developing housing 10 and the blade holder 51 in the front-back direction, and the buffer 53 is located behind the blade holder 51 / second side plate 512. The buffer 53 is installed on the developing housing 10 or the second side plate 512, and the developing housing 10 or the second side plate 512 has a mounting surface, on which the buffer 53 is disposed.

[0029] After the powder-dispensing blade 50 is installed into the developing cartridge 100, in the vertical direction, the first side plate 511 is located above the second side plate 512, and along the front-to-back direction, the blade 52, the second side plate 512 and the buffer 53 are arranged in sequence.

[0030] like Figure 1 , Figure 3 and Figure 4 As shown, the developing cartridge 100 also includes at least two mounting portions 11, which are integrally formed with the developing housing 10. When two mounting portions 11 are provided on the developing housing 10, the mounting portions 11 are located at the left and right ends of the developing housing 10 respectively. The blade holder 51 is mounted on the mounting portion 11, thereby allowing the blade holder 51 to be mounted to the developing housing 10.

[0031] The mounting part 11 includes a main body 111 and a positioning part 112, the positioning part 112 being a protrusion extending from the main body 111; the first side plate 511 of the blade holder 51 is provided with a positioned part 513 for cooperating with the positioning part 112, the positioned part 513 being configured as a notch formed on the first side plate 511, and the blade holder 51 is positioned on the developing housing 10 through the cooperation of the positioning part 112 and the positioned part 513; in some embodiments, the positioning part 112 and the positioned part 513 can be interchanged.

[0032] The main body 111 includes a fixing part 113. In the front-rear direction, the fixing part 113 is located at the front end of the main body 111. The fixing part 113 has a fixing surface 114 facing forward / knife holder 51 / second side plate 512. The fixing surface 114 is inclined so that the developing cartridge 100 is projected into a plane perpendicular to the left-right direction. Along the top-down direction, the distance between the fixing surface 114 and the first rotation axis L1 of the developing roller 20 gradually decreases.

[0033] Figure 5 yes Figure 4 Plan view after sectioning along the BB direction.

[0034] Observe along the left and right directions, or, as Figure 5 As shown, a first straight line M passing through the first rotation axis L1 and the second rotation axis L2 intersects with a second straight line N parallel to the fixed surface 114 / second side plate 512, and the first included angle α between the first straight line M and the second straight line N ranges from 60° to 70°.

[0035] Figure 6 This is a plan view of the developing cartridge involved in this utility model, viewed from left to right.

[0036] Or, such as Figure 6 As shown, when viewed from left to right, a third straight line P, which is parallel to the first surface 413 in the chip component 40, intersects the second straight line N, and the second included angle β between the second straight line N and the third straight line P ranges from 55° to 65°.

[0037] When the first included angle α is less than 60° or the second included angle β is less than 55°, the cutting depth between the powder discharge knife 50 / blade 52 and the surface of the developing roller 20 decreases, the torque of the developing cartridge 100 can be reduced, but the developer on the surface of the developing roller 20 becomes thicker, the powder consumption of the developing cartridge 100 increases, and the page output decreases.

[0038] When the first included angle α is greater than 70° or the second included angle β is greater than 65°, the cutting depth between the powder discharge knife 50 / blade 52 and the surface of the developing roller 20 increases, and the torque of the developing cartridge 100 can be increased. However, the developer on the surface of the developing roller 20 becomes thinner, which will affect the imaging quality of the developing cartridge 100 and may even prevent the imaging device from imaging.

[0039] Preferably, the first included angle α is set to 63.5° and the second included angle β is set to 60°. Under these conditions, the developing cartridge 100 can ensure the imaging quality of the imaging device while minimizing toner consumption and increasing page yield.

[0040] In some embodiments, the mounting surface is parallel to the fixing surface 114. After the powder discharge blade 50 is installed, the cutting depth of the blade 52 at any position in the left-right direction is the same as that of the developing roller 20 surface, thereby making the developer thickness on the developing roller 20 surface the same.

[0041] When the mounting section 11 is configured as described above, after the powder discharge blade 50 is installed in the mounting section 11, the cutting depth between the blade 52 and the surface of the developing roller 20 increases, the developer on the surface of the developing roller 20 becomes thinner, the powder consumption during imaging of the developing cartridge 100 decreases, the page yield increases, and thus the service life of the developing cartridge 100 can be extended, reducing the user's operating costs.

[0042] like Figure 3 and Figure 4 As shown, the fixing part 113 is also provided with a fixing groove 115 with the opening facing forward, and the opening of the fixing groove 115 is located on the fixing surface 114; the second side plate 512 is provided with a mounting hole 514 that runs through the front and rear direction, and the fixing component in the developing cartridge 100, such as a screw, can enter the fixing groove 115 through the mounting hole 514, thereby fixing the powder blade 50 / blade holder 51 to the mounting part 11 / developing housing 10.

[0043] [Beneficial Effects]

[0044] Compared with the prior art, the developing cartridge 100 provided by this utility model has the following beneficial effects:

[0045] Firstly, the fixing surface 114 of the mounting part 11 is inclined. Specifically, when viewed along the left-right direction, a first straight line M passing through the first rotation axis L1 and the second rotation axis L2 intersects with a second straight line N parallel to the fixing surface 114 / second side plate 512, and the angle α between the first straight line M and the second straight line N ranges from 60° to 70°. With this arrangement, after the powder discharge blade 50 is installed in the mounting part 11, the cutting depth of the blade 52 into the surface of the developing roller 20 increases, the developer on the surface of the developing roller 20 becomes thinner, the powder consumption during imaging of the developing cartridge 100 decreases, the page yield is increased, and thus the service life of the developing cartridge 100 can be extended, reducing the user's operating costs.

[0046] Secondly, to achieve the same purpose, existing powder discharge blades have blades that are inclined / bent relative to the second side plate 512. Such blades can increase the cutting depth with the surface of the developing roller 20, but such blades are prone to deformation during long-term use. The powder discharge blade 50 blade 52 in the developing cartridge 100 provided by this utility model is not inclined / bent relative to the second side plate 512. That is, the developing cartridge 100 provided by this utility model can not only increase the cutting depth of the blade 52 with the surface of the developing roller 20, but also reduce the possibility of the blade 52 deforming due to long-term contact with the surface of the developing roller 20.

[0047] Thirdly, in the actual application of the developing cartridge 100, the angle of the first included angle α can be adjusted according to the user's specific requirements for color brightness or image quality, thereby increasing the applicability of the developing cartridge 100.

Claims

1. A developing cartridge, comprising a developing housing and a powder feeding roller and a developing roller rotatably mounted to the developing housing, the developing housing for containing developer, the powder feeding roller for conveying developer to the surface of the developing roller, and the developing roller for conveying developer to the outside of the developing cartridge; The developing roller can rotate about a first rotation axis parallel to the left and right direction, and the powder feeding roller can rotate about a second rotation axis parallel to the first rotation axis. Its features are, The developing housing is also provided with a fixed surface for mounting a powder discharge knife that adjusts the thickness of the developer on the surface of the developing roller. When viewed from the left and right direction, a first straight line passing through the first axis of rotation and the second axis of rotation intersects with a second straight line parallel to the fixed surface, and the angle between the first straight line and the second straight line is in the range of 60° to 70°.

2. The developing cartridge according to claim 1, characterized in that, The first included angle is set to 63.5°.

3. The developing cartridge according to claim 1, characterized in that, The direction intersecting the left and right directions is the front and back direction. At least a portion of the developing roller is located in front of the powder feeding roller. The direction intersecting the left and right directions and the front and back directions is the up and down direction. The developing box is projected along the left and right directions onto a plane perpendicular to the left and right directions. Along the top-down direction, the distance between the fixed surface and the first rotation axis of the developing roller gradually decreases.

4. The developing cartridge according to claim 1, characterized in that, The developing cartridge can be detachably installed into an imaging device equipped with a stylus. The developing cartridge also includes a chip for storing its parameter information. The chip is fixedly mounted on the developing housing. The chip includes a substrate and at least one electrical contact. The substrate has a first surface, and the electrical contact is disposed on the first surface. The electrical contact is used to electrically connect with the stylus, so that a communication connection can be formed between the developing cartridge and the imaging device. When viewed from the left and right direction, a third straight line parallel to the first surface intersects the second straight line, and the angle between the third straight line and the second straight line ranges from 55° to 65°.

5. The developing cartridge according to claim 4, characterized in that, The second included angle is set to 60°.

6. The developing cartridge according to claim 1, characterized in that, The powder discharge knife includes a knife holder and a blade. The knife holder includes a first side plate and a second side plate connected to each other. The first side plate is bent relative to the second side plate. The second side plate is supported by the developing housing and is provided with mounting holes. The blade is mounted on the second side plate and is used to contact the surface of the developing roller to adjust the developer thickness on the surface of the developing roller. The developing cartridge also includes a fixing member and at least two mounting portions integrally formed with the developing housing. The mounting portion includes a main body with a fixing portion and a fixing groove with an opening located on the fixing surface. The fixing member passes through the mounting hole and enters the fixing groove, thereby fixing the powder discharge blade.

7. The developing cartridge according to claim 6, characterized in that, The mounting part also includes a positioning part disposed on the main body, and the first side plate is provided with a positioning part for cooperating with the positioning part.

8. The developing cartridge according to claim 6, characterized in that, The developing chamber also includes a buffer to prevent developer leakage, and the developing housing or second side plate has a mounting surface for mounting the buffer, the mounting surface being parallel to the fixing surface.

Images