Doctor blade and developing box

Abstract

The doctor blade is used for adjusting the thickness of a carbon powder layer on the surface of a developing roller, the doctor blade comprises a blade and a knife rest which are combined with each other, the blade is used for being in contact with the surface of the developing roller, and the doctor blade further comprises an installation part which is at least arranged on the knife rest and used for installing a carbon powder layer on the surface of the developing roller through the installation part. The doctor blade is fixedly mounted; the combination area is located on at least one of the knife rest and the blade, the knife rest and the blade are combined in the combination area, the installation part is located in the combination area, and the design can increase the area of the combination area, so that the blade can be supported by the knife rest more stably.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of electrophotographic imaging, especially to a developing box which can be detachably installed in an electrophotographic imaging device and a powder outletting knife arranged in the developing box. BACKGROUND

[0002] A developing box for an electrophotographic imaging device (hereinafter referred to as "imaging device") is provided, wherein a plurality of rotating members such as a developing roller, a powder feeding roller and a stirring frame are rotatably arranged. When the developing box is developing in the imaging device, a driving force receiving member in the developing box receives a driving force from the imaging device to drive the developing roller, the powder feeding roller and the stirring frame to rotate. The stirring frame is used to stir the toner stored in the developing box, and the powder feeding roller is used to feed the toner to the developing roller. The developing roller is used to carry the toner and supply the toner to the photosensitive drum on which an electrostatic latent image is formed, so that the electrostatic latent image on the photosensitive drum is developed.

[0003] In order for the imaging device to know whether the developing box is installed, the model, the service life and other information, the developing box is further provided with a detection device, and the imaging device is provided with a detected member for interacting with the detection device. When the driving force receiving member receives the driving force, the detection device starts to work. When the detection device and the detected member complete the interaction, the detection process ends, and the detection device stops working. The developing box continues to develop. SUMMARY

[0004] The utility model further develops the prior art to solve at least one of the above technical problems, in particular:

[0005] The powder outletting knife is used to adjust the thickness of the toner layer on the surface of the developing roller. The powder outletting knife comprises a blade and a holder which are combined with each other. The blade is used to contact the surface of the developing roller,

[0006] The powder outletting knife further comprises:

[0007] The installation part is arranged on at least the holder. Through the installation part, the powder outletting knife is fixedly installed.

[0008] The combining area is arranged on at least one of the holder and the blade. The holder and the blade are combined in the combining area. The installation part is arranged in the combining area.

[0009] In some embodiments, the developing roller rotates around a rotating axis extending in a first direction. The holder has a first end and a second end which are spaced from each other. The blade has a third end and a fourth end which are spaced from each other. The second end is located between the third end and the fourth end. The third end is located between the first end and the second end. The first end is farther away from the rotating axis than the second end. The third end is farther away from the rotating axis than the fourth end. The third end is farther away from the rotating axis than the second end.

[0010] The second end and the third end form a joint region.

[0011] In some embodiments, the mounting portion passes through both the blade and the holder.

[0012] In some embodiments, the blade comprises a pressing portion and an extending portion connected to each other, wherein the pressing portion is configured to contact the surface of the developing roller, and the extending portion extends from an end of the pressing portion;

[0013] An included angle β between an extending direction of the pressing portion and an extending direction of the extending portion is greater than 90° when viewed in the first direction.

[0014] In some embodiments, the blade is formed with a contact portion configured to contact the surface of the developing roller, the pressing portion has an end face facing upstream in a rotation direction of the developing roller, the end face extends from the contact portion in a direction away from the developing roller, and an included angle α between the end face and a tangent plane passing through the contact portion is less than 90°.

[0015] In some embodiments, the powder outlet blade further comprises a reinforcing member disposed on the holder, the reinforcing member is mounted on the same side of the holder as the blade.

[0016] In some embodiments, the reinforcing member is disposed continuously or discontinuously along the first direction,

[0017] In some embodiments, the two ends of the blade are respectively provided with a first notch and a second notch, and the mounting portion does not pass through the first notch and the second notch.

[0018] The second aspect also provides a developing cartridge, which is detachably mounted to an image forming device, the developing cartridge comprising:

[0019] A housing configured to accommodate toner;

[0020] A developing roller rotatably disposed in the housing, a rotation axis of the developing roller extending along a first direction;

[0021] The powder outlet blade is fixedly mounted on the housing and configured to adjust a thickness of a toner layer on the surface of the developing roller;

[0022] A driving force receiving member configured to receive a driving force from the image forming device to drive the rotating member to rotate, and having a rotation axis parallel to the first direction; wherein

[0023] The holder comprises a first portion and a second portion connected to each other, the blade is supported by the first portion, and the first portion and the second portion are L-shaped.

[0024] An edge of the holder forms a surface M perpendicular to the rotation axis of the driving force receiving member when viewed in the first direction, and the rotation axis of the driving force receiving member is located outside the surface. In some embodiments, BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1A and Figure 1B is a perspective view of the developing box according to the first embodiment of the present application.

[0026] Figure 2 is an exploded view of the developing box according to the first embodiment of the present application, in which the parts of the driving end are separated from the housing.

[0027] Figure 3A is a side view of the developing box according to the first embodiment of the present application, in which the driving end cover is hidden and viewed along the first direction.

[0028] Figure 3B is a side view of the developing box according to the first embodiment of the present application, in which the driving end cover is hidden and viewed along the third direction.

[0029] Figure 4 is an exploded view of the developing box according to the first embodiment of the present application, in which the parts of the conductive end are separated from the housing.

[0030] Figure 5 is a side view of the developing box according to the first embodiment of the present application, viewed along the first direction.

[0031] Figure 6A is a top view of the powder outlet knife according to the first embodiment of the present application, viewed along the second direction.

[0032] Figure 6B is a side view of the powder outlet knife according to the first embodiment of the present application, viewed along the first direction when the powder outlet knife contacts the developing roller.

[0033] Figure 7A is a perspective view of the driving end of the developing box according to the second embodiment of the present application.

[0034] Figure 7B is a side view of the developing box according to the second embodiment of the present application, in which the driving end cover is hidden and viewed along the third direction.

[0035] Figure 8 is a top view of the powder outlet knife according to the second embodiment of the present application, viewed along the second direction.

[0036] Figure 9 is a perspective view of the conductive end of the developing box according to the third embodiment of the present application.

[0037] Figure 10 is a perspective view of the developing box according to the fourth embodiment of the present application, in which the face cover and the bottom housing are separated.

[0038] Figure 11is a perspective view of the support, the conductive part and the shell of the developing box according to the fifth embodiment of the present utility model.

[0039] Figure 12 is a perspective view of the powder outlet knife according to the sixth embodiment of the present utility model.

[0040] Figure 13 is a side view of the relative positions of the powder outlet knife, the developing roller and the first transmission part when viewed from right to left along the first direction in the developing box according to the sixth embodiment of the present utility model.

[0041] Figure 14 is a perspective view of the powder outlet knife and the shell of the developing box according to the seventh embodiment of the present utility model.

[0042] Figure 15 is a perspective view of the powder outlet knife according to the eighth embodiment of the present utility model.

[0043] Figure 16 is a perspective view of a variant structure of the powder outlet knife according to the eighth embodiment of the present utility model. DETAILED DESCRIPTION

[0044] The embodiments of the present utility model will be described in detail below with reference to the drawings.

[0045] [Embodiment One]

[0046] Figure 1A and Figure 1B is a perspective view of the developing box according to the first embodiment of the present utility model; Figure 2 is an exploded schematic view of the partial components of the drive end and the shell of the developing box according to the first embodiment of the present utility model after separation; Figure 3A is a side view of the developing box according to the first embodiment of the present utility model after hiding the drive end cover and viewed along the first direction; Figure 3B is a side view of the developing box according to the first embodiment of the present utility model after hiding the drive end cover and viewed along the third direction; Figure 4 is an exploded schematic view of the partial components of the conductive end and the shell of the developing box according to the first embodiment of the present utility model after separation; Figure 5 is a side view of the developing box according to the first embodiment of the present utility model viewed along the first direction; Figure 6A is a top view of the powder outlet knife according to the first embodiment of the present utility model viewed along the second direction; Figure 6B is a side view of the powder outlet knife and the developing roller according to the first embodiment of the present utility model when in contact and viewed along the first direction.

[0047] The developing cartridge 100 can be detachably installed into an image forming apparatus provided with a detected member 9 (as shown in FIG. 7), and can be formed in a "one-piece" structure including both a developing roller and a photosensitive drum, or in a "split" structure including only the developing roller but not the photosensitive drum. Regardless of the form of the developing cartridge 100, it can be directly or indirectly detachably installed into the image forming apparatus, for example, the developing cartridge 100 is first installed into a drum cartridge, and then the combination of the developing cartridge 100 and the drum cartridge is detachably installed into the image forming apparatus, or the developing cartridge 100 is directly detachably installed into the image forming apparatus.

[0048] The developing cartridge 100 includes a housing 1, a rotating member 2, a driving force receiving member 3, and a detection device 4. The housing 1 is formed with a cavity 10 for accommodating toner. The rotating member 2 is rotatably arranged in the housing 1. The driving force receiving member 3 is configured to receive a driving force from the image forming apparatus to drive the rotating member 2 to rotate. The detection device 4 is configured to interact with the detected member, so that various parameter information of the developing cartridge 100 is known by the image forming apparatus, such as whether the developing cartridge 100 is installed, the model of the developing cartridge 100, the service life of the developing cartridge 100, and the like. Further, the developing cartridge 100 further includes an end cover 11 connected with the housing 1 and a handle 12.

[0049] The rotating member 2 and the detection device 4 are both configured to directly or indirectly receive the driving force from the driving force receiving member 3 to work, that is, the driving force receiving member 3 directly or indirectly supplies the driving force received thereby to the rotating member 2 and the detection device 4, so that the rotating member 2 and the detection device 4 work. In the present embodiment, the driving force receiving member 3 is exposed from an exposure hole 112 (as shown in FIG. 8) provided in the end cover 11. The developing cartridge 100 is further provided with a driving force transmission assembly 6, which is configured to transmit the driving force of the driving force receiving member 3 to the rotating member 2 and the detection device 4, respectively. Figure 2

[0050] The rotating member 2 includes a developing roller 21, a powder feeding roller 22, and a stirring frame 23. The powder feeding roller 22 is in contact with the developing roller 21, and is configured to supply toner to the developing roller 21. The stirring frame 23 is configured to stir the toner. When the driving force receiving member 3 receives the driving force to rotate about a rotation axis L2, the developing roller 21, the powder feeding roller 22, and the stirring frame 23 rotate about their respective rotation axes, wherein the rotation axis of the developing roller 21 is L1, the rotation axis of the stirring frame 23 is L3, and the rotation axes L1, L2, L3 are parallel to each other.

[0051] ​For the sake of making the following description clearer, the extending direction of the rotation axis L1 is defined as the first direction, the direction intersecting the first direction is defined as the second direction, and the direction intersecting the first direction and the second direction is defined as the third direction, preferably, the first direction, the second direction and the third direction are orthogonal; as shown in the figure, along the second direction, the developing roller 21 and the handle 12 are respectively located at two ends of the housing 1, when the developing cartridge 100 is installed towards the drum cartridge or the image forming device, the developing roller 21 is located at the front in the installation direction, and the handle 12 is located at the rear in the installation direction, thus, the second direction can also be regarded as the installation direction; along the first direction, the driving force receiving member 3 is located at one end (the driving end) of the housing 1, and the detection device 4 can be located at the same end of the driving force receiving member 3 or at two ends of the housing 1 respectively, hereinafter, the detection device 4 and the driving force receiving member 3 are located at the same side as an example.

[0052] The developing cartridge 100 further comprises a powder outlet blade 7 and a conductive member 5, the powder outlet blade 7 is fixedly installed on the housing 1 and in contact with the outer surface of the developing roller 21, for adjusting the amount of toner carried by the developing roller 21; the conductive member 5 is directly or indirectly installed on the housing 1, for receiving power from the image forming device and supplying to the developing roller 21 and / or the toner feeding roller 22.

[0053] Further, along the first direction, the driving force receiving member 3 and the conductive member 5 are respectively located at two ends of the housing 1, thus, the end where the conductive member 5 is located can be referred to as the conductive end, the driving end is defined as the left of the developing cartridge 100, and the conductive end is defined as the right of the developing cartridge 100, in the state that the developing cartridge 100 is installed to the image forming device, the direction of gravity of the developing cartridge 100 is downward, and the opposite direction is upward, along the third direction, at least a part of the powder outlet blade 7 is located above the rotation axis L1.

[0054] Further, along the first direction, the housing 1 has a left side wall 1a and a right side wall 1b which are separated from each other, the cavity 10 is located between the left side wall 1a and the right side wall 1b, the driving force transmission assembly 6 is directly or indirectly installed on the left side wall 1a, and the conductive member 5 is directly or indirectly installed on the right side wall 1b.

[0055] (Driving force transmission assembly)

[0056] As Figure 2As shown, the driving force transmission assembly 6 comprises a first transmission member 61, a second transmission member 62, a third transmission member 63, a fourth transmission member 64 and a fifth transmission member 65, wherein the first transmission member 61 is coaxially arranged with the driving force receiving member 3, the second transmission member 62 is coaxially arranged with the developing roller 21, the third transmission member 63 is coaxially arranged with the powder feeding roller 22, the fifth transmission member 65 is coaxially arranged with the stirring frame 23, the fourth transmission member 64 is located between the first transmission member 61 and the fifth transmission member 65, and the fourth transmission member 64 is combined with the first transmission member 61 and the fifth transmission member 65 at the same time, the fifth transmission member 65 is used to be combined with the detection device 4, thus the driving force received by the driving force receiving member 3 is transmitted to the detection device 4 in sequence through the first transmission member 61, the fourth transmission member 64 and the fifth transmission member 65; at least one of the second transmission member 62 and the third transmission member 63 is combined with the first transmission member 61 to receive the driving force from the driving force receiving member 3, when one of the second transmission member 62 and the third transmission member 63 is combined with the first transmission member 61, the second transmission member 62 and the third transmission member 63 can transmit the driving force by being combined with each other, when the second transmission member 62 and the third transmission member 63 are combined with the first transmission member 61 at the same time, the driving force can be directly transmitted to the second transmission member 62 and the third transmission member 63, finally, the developing roller 21, the powder feeding roller 22 and the stirring frame 23 are all driven.

[0057] In some embodiments, the first transmission member 61 comprises a first small-diameter portion 611 and a first large-diameter portion 612 which are coaxially arranged, the diameter of the first small-diameter portion 611 is smaller than that of the first large-diameter portion 612, along the first direction, the first small-diameter portion 611 is farther away from the shell 1 / cavity 10 / conductive end than the first large-diameter portion 612; the fourth transmission member 64 comprises a second small-diameter portion 641 and a second large-diameter portion 642 which are coaxially arranged, the diameter of the second small-diameter portion 641 is smaller than that of the second large-diameter portion 642, the fifth transmission member 65 is combined with the second small-diameter portion 641, along the first direction, the second small-diameter portion 641 is farther away from the shell 1 / cavity 10 / conductive end than the second large-diameter portion 642; the fifth transmission member 65 is provided with a driving portion 650 for driving the detection device 4.

[0058] As described above, the first large-diameter portion 612 is closer to the shell 1 / cavity 10 / conductive end than the first small-diameter portion 611, and the second large-diameter portion 642 is closer to the shell 1 / cavity 10 / conductive end than the second small-diameter portion 641, which is conducive to reducing the possible shaking of the first transmission member 61 and the fourth transmission member 64, thereby improving the stability of the driving force transmission assembly 6 in transmitting driving force.

[0059] As Figure 3BAs shown, along the first direction, the fifth transmission member 65 is not closer to the housing 1 than the fourth transmission member 64 and / or the first transmission member 61, that is, along the first direction, the fifth transmission member 65, the fourth transmission member 64 and the first transmission member 61 are at the same distance from the housing 1, or the distance from the housing 1 of the fifth transmission member 65 is greater than that of the fourth transmission member 64 and / or the first transmission member 61, or the distance from the housing 1 of the fifth transmission member 65 is not less than that of the fourth transmission member 64 and / or the first transmission member 61; since the outer surface of the first side wall la is not a plane, in order to more clearly show the distance, Figure 3B A reference surface D is introduced in the middle, the reference surface D is parallel to the second direction, and the reference surface D also passes through the cavity 10, along the first direction, the distance from the position farthest from the housing 1 of the fifth transmission member 65 to the reference surface D is h1, the distance from the position farthest from the housing 1 of the fourth transmission member 64 (the second small diameter part 641) to the reference surface D is h2, and the distance from the position farthest from the housing 1 of the first transmission member 61 (the first small diameter part 611) to the reference surface D is h3, satisfying h1≥h2, h1≥h3; such a design can effectively avoid interference between the fifth transmission member 65 and the fourth transmission member 64 or between the fifth transmission member 65 and the first transmission member 61, on the one hand, and can make the later-described movable member 42 have a larger movement space, and on the other hand, the movable member 42 can also be effectively protected by the fifth transmission member 65, preventing the movable member 42 from falling off.

[0060] (detection device)

[0061] As Figure 2 shown, the detection device 4 includes a detection member 41, a movable member 42, a pushing member 43 and a reset member 44, under the action of the reset member 44, the detection member 41 can reciprocate in a direction intersecting the first direction, the movable member 42 is used to be driven by the fifth transmission member 65 to transmit driving force to the detection member, and then force the detection member 41 to interact with the detection member, and the pushing member 43 is used to push the movable member 42 to a state where the driving force transmission between the detection member 41 and the detection member is disconnected.

[0062] In an embodiment, the detection member 41 is movably mounted on the end cover 11, as shown, the end cover 11 includes an end cover body 111, an exposure hole 112 and a guide part 113, along the first direction, the exposure hole 112 passes through the end cover body 111, and the guide part 113 is used to guide the detection member 41, preferably, the guide part 113 is a sliding groove provided on the end cover body 111, and the reset member 44 is an elastic member mounted in the sliding groove 113, when the detection member 41 is driven by the movable member 42 to move, the reset member 44 is elastically deformed, when the detection member 41 is no longer driven by the movable member 42, the reset member 44 releases the elastic force, so that the detection member 41 resets.

[0063] In one embodiment, the guide 113 can also be a protrusion provided on the end cover body 111, and the detection member 41 is provided with a groove for cooperating with the protrusion.

[0064] The movable member 42 comprises a movable body 421, and a driven portion 422 and a driving portion 423 connected to the movable body 421 respectively, the driven portion 422 and the driving portion 423 both protrude from the movable body 421, the driven portion 422 is used to combine with the driving portion 650 to receive the driving force transmitted by the fifth transmission member 65, and the driving portion 423 is used to transmit the driving force to the detection member 41, so that the detection member 41 can move along a predetermined track, thereby the detection member 41 interacts with the detected member.

[0065] Specifically, the movable member 42 is arranged to be movable between a close position close to the shell 1 and an away position away from the shell 1, more specifically, the movable member 42 is arranged to be movable in a direction parallel to the first direction, for example, before the detection device 4 / detection member 41 completes the interaction with the detected member, the movable member 42 is located at the away position away from the shell 1, at this time, the movable member 42 can transmit the driving force to the detection device 4 / detection member 41, after the detection device 4 / detection member 41 completes the interaction with the detected member, the movable member 42 moves to the close position close to the shell 1 under the action of the urging member 43, at this time, the driving force transmission between the movable member 42 and the detection device 4 / detection member 41 is disconnected; in some embodiments, the movement process of the movable member 42 can also be reversed, that is, before the detection device 4 / detection member 41 completes the interaction with the detected member, the movable member 42 is located at the close position close to the shell 1, at this time, the movable member 42 can transmit the driving force to the detection device 4 / detection member 41, after the detection device 4 / detection member 41 completes the interaction with the detected member, the movable member 42 moves to the away position away from the shell 1 under the action of the urging member 43, at this time, the driving force transmission between the movable member 42 and the detection device 4 / detection member 41 is disconnected.

[0066] In some embodiments, the developing cartridge 100 further comprises a support column 13 protruding from the left side wall la, the movable member 42 is supported by the support column 13, the movable member 42 can be provided with a combination groove 424, and the support column 13 is provided with a combination protrusion 131 which can combine with the combination groove 424, when the movable member 42 is located at the away position, the combination groove 424 does not combine with the combination protrusion 131, when the detection device 4 / detection member 41 completes the interaction with the detected member, the combination protrusion 131 enters the combination groove 424 to complete the combination under the action of the urging member 43, and the movable member 42 reaches the close position; conversely, the positions of the combination protrusion 131 and the combination groove 424 can also be interchanged.

[0067] In some embodiments, the detection element 41 is provided with a driven part 411 and an actuating part 412. The driven part 411 is actuated by the driving part 423, and the driving force is transmitted to the detection element 41. When the detection element 411 is driven, the actuating part 412 can interact with the detected element 9.

[0068] (Conductive component)

[0069] like Figure 4 As shown, the conductive component 5 includes a power receiving part 51, a power supply part 52, and a connecting part 53. The power receiving part 51 is used to receive power from the imaging device. Through the connecting part 53, the power is transmitted to the power supply part 52, and then the power supply part 52 supplies the power to at least one of the developing roller 21 and the powder feeding roller 22.

[0070] The developing roller 21 includes a developing roller shaft 212 and a developing layer 211 covering the outside of the developing roller shaft 212. The developing layer 211 is used to carry toner. The toner feeding roller 22 includes a toner feeding roller shaft 222 and a toner feeding layer 221 covering the outside of the toner feeding roller shaft 222. The toner feeding layer 221 is used to supply toner to the developing layer 211. Generally, the developing roller shaft 212 and the toner feeding roller shaft 222 are both made of metal to reduce the delay in the transmission of driving force in the developing roller 21 and the toner feeding roller 22. Therefore, in some embodiments, the developing roller shaft 212 and the toner feeding roller shaft 222 may also be made of non-metal.

[0071] Generally, imaging equipment is provided with a first power output unit for supplying power to the developing roller 21 and a second power output unit for supplying power to the powder feeding roller 22. The voltage output by the second power output unit is higher than the voltage output by the first power output unit. In this embodiment, the power receiving unit 51 is configured to contact the second power output unit and receive the voltage output by the second power output unit. The power supply unit 52 is in contact with the developing roller shaft 212. Preferably, the power supply unit 52 is in contact with the end face of the developing roller shaft 212.

[0072] like Figure 5 As shown, when viewed from right to left along the first direction, the conductive element 5 is located outside the projection range of the driving force receiver 3. This design can effectively reduce the impact of the vibration generated by the driving force receiver 3 during rotation on the conductive element 5. In particular, the vibration generated by the driving force receiver 3 is greater at the moment it is driven, but the conductive element 5 is not located within the projection range of the driving force receiver 3. Thus, the power receiving part 51 can not only maintain stable contact with the second power output part, but the power supply part 53 can also maintain stable contact with the developing roller shaft 212.

[0073] (Dispense powder)

[0074] The powder outletting knife 7 comprises a knife holder 71 and a blade 72, both of which extend along the first direction, the blade 72 is fixedly installed on the knife holder 71 and used to contact the developing roller 21 (the developing layer 211) to adjust the thickness of the carbon powder layer on the surface of the developing roller 21 (the developing layer 211), commonly, the blade 72 can be connected with the knife holder 71 by means of bonding, welding and the like, for example, as shown in Figs. Figure 6A and Figure 6B The blade 72 is welded on the knife holder 71, and a plurality of welding portions 74 are formed between the blade 72 and the knife holder 71.

[0075] Further, the powder outletting knife 7 further comprises at least one mounting portion 73 provided on the knife holder 71, through the mounting portion 73, the powder outletting knife is fixedly installed, specifically, a screw as a mounting member passes through the mounting portion 73, the powder outletting knife 7 can be fixedly installed on the casing 1, preferably, the powder outletting knife 7 is provided with two mounting portions 73, along the first direction, the two mounting portions 73 are respectively located at two end portions of the powder outletting knife, the mounting portion 73 is provided as a mounting hole; along the third direction (a direction intersecting the first direction and the thickness direction of the blade), the knife holder 71 has a first end 71a and a second end 71b which are spaced apart from each other, the blade 72 has a third end 72a and a fourth end 72b which are spaced apart from each other, wherein the second end 71b is located between the third end 72a and the fourth end 72b, the third end 72a is located between the first end 71a and the second end 71b, along the third direction, the first end 71a is farther away from the rotation axis L1 than the second end 71b, the third end 72a is farther away from the rotation axis L1 than the fourth end 72b, and the third end 72a is farther away from the rotation axis L1 than the second end 71b.

[0076] The second end 71b and the third end 72a form a joint area S, the joint area S is located on at least one of the knife holder 71 and the blade 72, and the blade 72 and the knife holder 71 are combined in the joint area S; along the third direction, the mounting portion 73 and the welding portion are both located in the joint area S.

[0077] In some embodiments, the mounting portion 73 passes through the blade 72 and the knife holder 71 at the same time, in this way, the blade 72 can be further fixed.

[0078] In some embodiments, the third end 72a is farther away from the developing roller 21 / rotation axis L1 than the mounting portion 73, or in other words, the third end 72a is farther away from the second end 71b than the mounting portion 73, so that the area of the joint area S is as large as possible, and the blade 72 can be more stably supported by the knife holder 71.

[0079] [Embodiment Two]

[0080] Figure 7A is a perspective view of a driving end of the developing cartridge according to the embodiment two of the present application; Figure 7Bis a side view of the developing cartridge according to the second embodiment of the present application, viewed in the third direction after the drive end cover is hidden; Figure 8 is a plan view of the powder outletting knife according to the second embodiment of the present application, viewed in the second direction.

[0081] The same components as those in the first embodiment will be numbered the same way and will not be repeated here.

[0082] The driving force transmission assembly 6 according to the second embodiment of the present application is changed, as shown in the figure. Figure 7A The driving force transmission assembly 6 according to the second embodiment of the present application further comprises a sixth transmission member 66, which is located between the fourth transmission member 64 and the fifth transmission member 65, and the fourth transmission member 64 is combined with the first transmission member 61 and the sixth transmission member 66, and the sixth transmission member 66 is also combined with the fifth transmission member 65.

[0083] In some embodiments, the fourth transmission member 64 is arranged to still comprise a second small-diameter part 641 and a second large-diameter part 642 arranged coaxially, the second large-diameter part 642 is farther away from the shell 1 / cavity 10 / conductive end in the first direction than the second small-diameter part 641, the first small-diameter part 611 is combined with the second large-diameter part 642, and the second small-diameter part 641 is combined with the sixth transmission member 66.

[0084] In some embodiments, the fifth transmission member 65 is arranged to comprise a third small-diameter part 651 and a third large-diameter part 652 arranged coaxially, the third large-diameter part 652 is combined with the sixth transmission member 66, and the third small-diameter part 651 is combined with the detection device 4 for transmitting the driving force to the detection device 4, thus the third small-diameter part 651 corresponds to the above-mentioned driving part 650; the diameter of the third small-diameter part 651 is smaller than that of the third large-diameter part 652, the third small-diameter part 651 is farther away from the shell 1 in the third direction than the third large-diameter part 652, and the fifth transmission member 65 is closer to the shell 1 than the fourth transmission member 64 and the first transmission member 61 in the third direction, specifically, the part of the third small-diameter part 651 that is farthest away from the shell 1 is closer to the shell 1 than the part of the fourth transmission member 64 that is farthest away from the shell 1 and the part of the first transmission member 61 that is farthest away from the shell 1, and such an arrangement is conducive to reducing the size of the developing cartridge 100 in the first direction.

[0085] The structure of the detection device 4 involved in this embodiment is also changed. As shown in FIG7, the driving force between the movable part 42 and the detection part 41 in this embodiment is transmitted by friction drive or inter-tooth meshing. The movable part 42 is provided with a transmission part 42a and a non-transmission part 42b in sequence along the circumference. A part of the transmission part 42a is used to connect with the third small diameter part 651 to receive the driving force, and another part of the transmission part 42a is used to connect with the driven part 411 in the detection part 41 to transmit the driving force to the detection part 41. Therefore, a part of the transmission part 42a can be regarded as the driven part 422, and the other part of the transmission part 42a can be regarded as the driving part 423. When the non-transmission part 42b is connected with the driven part 411, the transmission of driving force between the movable part 42 and the detection part 41 is disconnected.

[0086] like Figure 7B As shown, along the first direction, the movable member 42 in this embodiment is positioned further away from the housing 1 / cavity 10 / conductive end than the first transmission member 61. Similarly, this embodiment still introduces the reference surface D. Along the first direction, the distance between the position of the movable member 42 furthest from the housing 1 and the reference surface D is h4, and the distance between the position of the first transmission member 61 (first small diameter portion 611) furthest from the housing 1 and the reference surface D is h3, satisfying h4≥h3. This design can improve the stability of the movable member 42 and reduce the risk of the movable member 42 shaking during rotation.

[0087] The detection element 41 still has the structure described in Embodiment 1. When the detection element 41 receives a driving force, the detection element 41 moves along a predetermined trajectory. The action part 412 interacts with the detected element 9. When the driving force transmission between the moving part 42 and the detection element 41 is disconnected, the reset part 44 releases the elastic force, and the detection element 41 is reset.

[0088] In feasible implementations, the driving force can be transmitted between the transmission components in various ways. For example, when the driving force is transmitted between the transmission components by inter-tooth meshing, the transmission components can be configured as gears; when the driving force is transmitted between the transmission components by friction driving, the transmission components can be configured as friction wheels; in other implementations, the transmission components can also be configured to transmit the driving force by belt drive, ratchet drive, etc., or the transmission components can also transmit the driving force by combining the above transmission methods; in this embodiment, the driven part 411 is preferably configured as a rack.

[0089] The structure of the powder-discharging blade 7 involved in this embodiment has also been changed, such as... Figure 8As shown, in the powder outlet knife 7 in the embodiment, along the first direction, two ends of the blade 72 are respectively provided with a first notch 721 and a second notch 722, and the two mounting portions 73 do not pass through the first notch 721 and the second notch 722, at this time, the mounting portion 73 will only pass through the knife holder 71, along the third direction, the mounting portion 73 is still located in the combination area S.

[0090] [Embodiment three]

[0091] Figure 9 It is the perspective view of the conductive end of the developing box related to the embodiment three of the utility model.

[0092] According to the above-mentioned embodiment, the application concept is focused on the structure of the developing roller 21 receiving power and the structure of the conductive part 5.

[0093] In the above-mentioned embodiment, the developing roller shaft 212 and the powder feeding roller shaft 222 respectively pass through the right side wall 1b and are exposed to the right, so that the conductive part 5 can directly contact the developing roller shaft 212 and / or the powder feeding roller shaft 222 on the right of the right side wall 1b to transmit power; however, since the developing roller shaft 212 and the powder feeding roller shaft 222 also need to pass through the left side wall 1a respectively to receive driving force, this makes the developing roller 21 and the powder feeding roller 22 prone to move in the left-right direction / first direction, therefore, at least one of the developing roller shaft 212 and the powder feeding roller shaft 222 in the embodiment is arranged not to pass through the right side wall 1b, so as to reduce or eliminate the movement amount of the developing roller 21 and the powder feeding roller 22 in the left-right direction; preferably, along the first direction, the position corresponding to the developing roller shaft 212 of the right side wall 1b and / or the position corresponding to the powder feeding roller shaft 222 of the right side wall 1b is in a closed state, at this time, the user cannot observe the developing roller shaft 212 and / or the powder feeding roller shaft 222 along the first direction.

[0094] Figure 9 The structure that the developing roller 21 and the powder feeding roller 22 do not pass through the right side wall 1b is shown, and the developing box 100 further comprises a first supporting portion 1c and a second supporting portion 1d arranged on the right side wall 1b, wherein the first supporting portion 1c is used for supporting the powder feeding roller shaft 222, and the second supporting portion 1d is used for supporting the developing roller shaft 212, specifically, the first supporting portion 1c and the second supporting portion 1d can be grooves arranged on the right side wall 1b, or can be protrusions protruding from the right side wall 1b to the left / conductive end (direction of the cavity 10).

[0095] Further, in order to reduce the wear of the first supporting portion 1c and the second supporting portion 1d, the developing box 100 further comprises a first shaft sleeve 223 and a second shaft sleeve 213 respectively installed in the first supporting portion 1c and the second supporting portion 1d, the powder feeding roller shaft 222 is supported by the first shaft sleeve 223, and the developing roller shaft 212 is supported by the second shaft sleeve 213.

[0096] Different from the above-mentioned embodiments, the power supply part 52 in the embodiment penetrates or passes through the right side wall 1b to contact with the developing roller shaft 212, at this time, the power supply part 52 reaches from the right side of the right side wall 1b to the left side of the right side wall 1b, the power supply part 52 can contact with the circumferential surface of the developing roller shaft 212 or the end surface of the developing roller shaft 212, when the power supply part 52 contacts with the end surface of the developing roller shaft 212, the second supporting part 1d can also be provided with an access port 1e for allowing the power supply part 52 to enter, finally, along the first direction, the power supply part 52 is clamped by the right side wall 1b and the end surface of the developing roller shaft 212, and the power supply part 52 can stably supply power to the developing roller shaft 212.

[0097] [Embodiment Four]

[0098] Figure 10 is a perspective view of the face cover and the bottom shell of the developing cartridge according to the fourth embodiment of the present application.

[0099] As described in the background, the developing roller is used to supply carbon powder to the photosensitive drum on which an electrostatic latent image is formed, thus, it is necessary to maintain good contact between the developing roller and the photosensitive drum during the developing process of the image forming device. Based on the inventive concept of the above-mentioned embodiments, the forced pushing mechanism 14 of the developing cartridge 100 is described in the embodiment.

[0100] As shown in Figure 10 , the shell 1 includes a bottom shell 1t and a face cover 1s combined with each other in a third direction, and the cavity 10 is formed between the bottom shell 1t and the face cover 1s, and the stirring frame 23 is rotatably arranged in the cavity 10. Generally, the bottom shell 1t and the face cover 1s can be combined by welding, clamping, gluing or the like. Further, the bottom shell 1t is also provided with a replenishing port 15 for communicating the cavity 10 with the outside of the developing cartridge, and the cavity 10 can be replenished with carbon powder through the replenishing port 15 after the bottom shell 1t and the face cover 1s are combined or after the carbon powder in the cavity 10 is consumed.

[0101] Further, the developing cartridge 100 also includes a forced pushing mechanism 14 connected with the face cover 1s, when the developing cartridge 100 is installed into the drum cartridge, the forced pushing mechanism arranged in the drum cartridge pushes the forced pushing mechanism 14, so that the developing roller 21 arranged in the shell 1 maintains contact with the photosensitive drum in the drum cartridge.

[0102] Preferably, the forced pushing mechanism 14 includes at least one of a left forced pushing piece 14L and a right forced pushing piece 14R arranged in the first direction, and more preferably, the left forced pushing piece 14L and the right forced pushing piece 14R are arranged at the same time, so that the developing cartridge 100 can be pushed at both ends in the first direction at the same time.

[0103] Continuing as Figure 10As shown, the left forced pushing piece 14L and the right forced pushing piece 14R are both arranged on the face cover 1s, and the structure of the face cover 1s is simpler than that of the bottom shell 1t, thus, not only the face cover 1s has more positions for arranging the forced pushing mechanism 14, but also the forced pushing mechanism 14 has higher design freedom, and correspondingly, the structure of the bottom shell 1t will not become more complex.

[0104] Preferably, the left forced pushing piece 14L and the right forced pushing piece 14R both extend downward from the rear end of the face cover 1s, thus, the left forced pushing piece 14L and the right forced pushing piece 14R are both formed in a cantilevered manner and have elasticity, and the design can make the developing cartridge 100 automatically adjust the forced pushing force applied by the forced pushing mechanism to the forced pushing mechanism 14, and finally, the developing roller 21 and the photosensitive drum can be kept in contact with each other with the most appropriate contact force.

[0105] [Embodiment five]

[0106] Figure 11 is a perspective view of the developing cartridge according to the fifth embodiment of the present application, in which the support, the conductive member and the shell are separated.

[0107] As described above, the developing roller 21 is rotatably arranged in the shell 1, and specifically, the developing cartridge 100 further comprises a support 8 arranged at the conductive end, the support 8 is fixedly connected with the shell 1, the developing roller 21 is supported by the support 8, and the conductive member 5 can be mounted on the shell 1 or the support 8, and at the same time, the conductive member 5 is electrically connected with the developing roller 21.

[0108] In some embodiments, the conductive member 5 can be omitted, and at this time, at least a part of the support 8 is made of conductive material, that is, the developing roller 21 can receive power from the image forming device through the support 8, one end of the support 8 is used for electrically contacting with the image forming device, and the other end is electrically contacted with the developing roller 21.

[0109] In some embodiments, the support 8 is made of non-conductive material, and the developing roller 21 still receives power from the image forming device through the conductive member 5.

[0110] No matter whether the support 8 is made of conductive material or non-conductive material, the technical solution of the present embodiment is applicable.

[0111] As shown in the figure, Figure 11 The support 8 comprises a supporting part 81, a connecting part 82 and a force receiving part 84, wherein the supporting part 81 and the force receiving part 84 are respectively located at two ends of the connecting part 82, the supporting part 81 is used for supporting the developing roller 21, and the force receiving part 84 is used for receiving the forced pushing force applied by the forced pushing mechanism in the drum cartridge, and then the forced pushing force is transmitted to the shell 1 through the support 8, and finally, the developing roller 21 rotatably arranged in the shell 1 keeps in contact with the photosensitive drum in the drum cartridge.

[0112] Similarly, the forced pushing mechanism 14 in the embodiment also includes a left forced pushing piece 14L and a right forced pushing piece 14R, wherein the right forced pushing piece 14R is the same as that in the fourth embodiment, and the left forced pushing piece 14L can be regarded as the force receiving part 84, that is, the left forced pushing piece 14L in the embodiment is arranged on the bracket 8, so that the structures of the bottom shell 1t and the face cover 1s can be simplified.

[0113] In some embodiments, the force receiving part 84 can also directly abut against the shell 1 after receiving the pushing force, and in this structure, the structural strength requirement of the bracket 8 can be reduced.

[0114] In some embodiments, the bracket 8 also includes a sealing part 83 for sealing the replenishment opening 15, so that the replenishment opening 15 can be sealed by the sealing part 83 when the bracket 8 is mounted to the shell 1, so that it is not necessary to separately arrange a sealing member for sealing the replenishment opening 15, and the sealing part 83 can be arranged at any position of the bracket 8 as long as the replenishment opening 15 can be sealed by the sealing part 83.

[0115] In some embodiments, when a sealing member for sealing the replenishment opening 15 is separately arranged in the developing cartridge 100, the sealing part 83 will be in contact with the sealing member, so that the bracket 8 can be more stably positioned, and correspondingly, the left forced pushing piece 14L is also further positioned and is not easy to shake.

[0116] Further, in this structure, when the force receiving part 84 receives the pushing force, the pushing force can also be transmitted by the abutment between the sealing part 83 and the shell forming the replenishment opening 15, so that the pushing force transmitted to the developing roller 21 by the supporting part 81 can be reduced, which is beneficial to prevent the pushing force from being too large to cause the developing roller 21 to move relative to the shell 1, and further cause the toner to leak from between the developing roller 21 and the shell 1.

[0117] [Embodiment six]

[0118] Figure 12 is a perspective view of a powder outlet knife related to the sixth embodiment of the utility model; Figure 13 is a relative position side view of a powder outlet knife, a developing roller and a first transmission piece in a developing cartridge when viewed from right to left along a first direction.

[0119] Based on the inventive concept of the above embodiments, the present embodiment continues to describe the structure of the powder scraper 7, the holder 71 in the present embodiment comprises a first portion 711 and a second portion 712 connected to each other, the blade 72 comprises a pressing portion 721 and an extending portion 722 connected to each other, wherein the pressing portion 721 is used to contact the surface of the developing roller 21, and the pressing portion 721 is connected to the first portion 711, or in other words, the pressing portion 721 is fixedly installed on the first portion 711, and the extending portion 722 is located at the fourth end 72b.

[0120] As shown in Figure 13 , the first portion 711 and the second portion 712 are not parallel to each other, so that a bending portion 713 will be formed between the first portion 711 and the second portion 712, and the overall strength of the holder 71 can be improved, the first portion 711 and the second portion 712 are in the shape of "L", when viewed along the first direction, the edge of the holder 71 will form a surface M perpendicular to the rotation axis L2 of the driving force receiving member 3 / the first transmission member 61, the surface M is in the shape of a square or a rectangle as a whole, and the rotation axis L2 does not pass through the surface M, or in other words, the rotation axis L2 is located outside the surface M, such a setting is beneficial to reduce the influence of the vibration generated by the driving force receiving member 3 during operation on the powder scraper 7 / the holder 71, so that the powder scraper 7 can be more stably fixed on the housing 1.

[0121] Further, the extending portion 722 is formed by extending from the pressing portion 721, specifically, the extending portion 722 extends from the end of the pressing portion 721 (referring to the above orientation, specifically, the lower end of the pressing portion 721), the setting of the extending portion 722 is beneficial to improve the strength of the blade 72, when viewed along the first direction, the included angle β between the extending direction of the pressing portion 721 and the extending direction of the extending portion 722 is > 90°, which can reduce the force required by the production equipment when manufacturing the powder scraper, thereby reducing the energy consumption of the production equipment and reducing the cost.

[0122] In Figure 13 , the extending length of the extending portion 722 is not more than 3 mm, and is preferably 0.5 mm-2 mm.

[0123] Further, when viewed along the first direction, the blade 72 forms a contact portion P used to contact the surface of the developing roller 21, the pressing portion 721 has an end face 723 facing the upstream of the rotation direction r of the developing roller (the lower side of the contact portion P), the end face 723 extends from the contact portion P in a direction away from the developing roller 21, the surface N is a tangent plane passing through the contact portion P, and the included angle α between the end face 723 and the tangent plane N is < 90°. Figure 13

[0124] [Embodiment Seven]

[0125] ​Figure 14 is a perspective view of the developing box according to the seventh embodiment of the present application, wherein the powder outlet knife is separated from the shell.

[0126] In the present embodiment, the second part 712 in the knife holder 71 is cancelled, thus the knife holder 71 will only be provided with the first part 711, and as a whole, the knife holder 71 is no longer L-shaped, but preferably I-shaped, and the I-shaped designed knife holder 71 can also reduce the manufacturing steps and manufacturing process of the powder outlet knife, thereby reducing the cost.

[0127] In order to improve the strength of the knife holder 71, the powder outlet knife 7 according to the present embodiment further comprises at least one auxiliary mounting portion 75 arranged on the first part 711, and correspondingly, the shell 1 is provided with a combination portion 16 corresponding to the auxiliary mounting portion 75, and the powder outlet knife 7 is mounted to the shell 1 through the combination of the auxiliary mounting portion 75 and the combination portion 16 in addition to being mounted to the shell 1 through the mounting portion 73, and the auxiliary mounting portion 75 is located between the two mounting portions 73 along the first direction.

[0128] In some embodiments, the auxiliary mounting portion 75 can be arranged as an auxiliary mounting hole, and the combination portion 16 is arranged as a combination hole, so that the powder outlet knife 7 can be more stably fixed by the screw passing through the auxiliary mounting hole 75 and the combination hole 16.

[0129] In some embodiments, the auxiliary mounting portion 75 is still arranged as an auxiliary mounting hole, and the combination portion 16 is arranged as a combination protrusion, in which structure, the powder outlet knife 7 is more stably fixed by the combination of the combination protrusion 16 and the auxiliary mounting hole 75 without using a screw; on the contrary, the auxiliary mounting portion 75 can also be arranged as a combination protrusion, and the combination portion 16 is arranged as a combination hole, and the powder outlet knife 7 can also be more stably fixed by the combination of the combination protrusion and the combination hole.

[0130] Preferably, a plurality of auxiliary mounting portions 75 are arranged on the knife holder 71 along the first direction.

[0131] [Embodiment eight]

[0132] Figure 15 is a perspective view of the powder outlet knife according to the eighth embodiment of the present application; Figure 16 is a perspective view of a variant structure of the powder outlet knife according to the eighth embodiment of the present application.

[0133] The powder outlet knife 7 in the present embodiment also does not include the second part 712, and similarly, in order to improve the strength of the knife holder 71, the powder outlet knife 7 in the present embodiment further comprises a reinforcing member 76 mounted on the knife holder 71.

[0134] In some embodiments, the reinforcing member 76 and the blade 72 are jointly mounted on the same side of the knife holder 71 / the first part 711.

[0135] In some implementations, such as Figure 15 As shown, the reinforcing members 76 are continuously arranged along the first direction. Under the premise of ensuring the strength of the tool holder 71, the reinforcing members 76 can also be intermittently arranged along the first direction. That is to say, multiple reinforcing members 76 are arranged on the tool holder 71 along the first direction.

[0136] In some embodiments, multiple reinforcing members 76 may also be arranged along the width direction (third direction) of the tool holder 71, such as... Figure 16 As shown, the two reinforcing members 76 are spaced apart along the width direction, and the two reinforcing members 76 can also be connected to each other in the width direction.

Claims

1. A toner discharge blade for adjusting the thickness of the toner layer on the surface of a developing roller, the toner discharge blade comprising blades and a blade holder joined together, the blades being used to contact the surface of the developing roller, characterized in that, The powder dispenser also includes: The mounting section is at least located on the knife holder, through which the powder discharge knife is fixedly installed; The mating area is located on at least one of the tool holder and the blade, and the tool holder and the blade are mated within the mating area. The mounting part is located within the mating area.

2. The powder dispensing blade according to claim 1, characterized in that, The developing roller rotates about a rotation axis extending in a first direction. Along a direction that intersects both the first direction and the thickness direction of the blade, the blade holder has a first end and a second end spaced apart from each other, and the blade has a third end and a fourth end spaced apart from each other. The second end is located between the third end and the fourth end, and the third end is located between the first end and the second end. The first end is farther away from the rotation axis than the second end, and the third end is farther away from the rotation axis than the fourth end. The third end is farther away from the rotation axis than the second end. A junction region is formed between the second and third ends.

3. The powder dispensing blade according to claim 1, characterized in that, The mounting section passes through both the blade and the tool holder.

4. The powder dispensing blade according to claim 1, characterized in that, The blade includes a pressing part and an extension part connected to each other, wherein the pressing part is used to contact the surface of the developing roller, and the extension part extends from the end of the pressing part; When viewed along the first direction, the angle β formed between the extension direction of the compression part and the extension direction of the extension part is greater than 90°.

5. The powder dispensing blade according to claim 4, characterized in that, The blade has a contact portion for contacting the surface of the developing roller, and the pressing portion has an end face facing upstream in the rotation direction of the developing roller. The end face extends from the contact portion in a direction away from the developing roller, and the included angle α formed between the end face and the tangent surface passing through the contact portion is less than 90°.

6. The powder dispensing blade according to claim 1, characterized in that, The powder-discharging blade also includes a reinforcing member mounted on the blade holder, which is installed on the same side of the blade holder as the blade.

7. The powder dispensing blade according to claim 6, characterized in that, The reinforcing members are provided continuously or intermittently along the first direction.

8. The powder dispensing blade according to claim 6, characterized in that, Multiple reinforcing members are arranged along the width direction of the tool holder.

9. The powder dispensing blade according to claim 1, characterized in that, The blade has a first notch and a second notch at its two ends, and the mounting part does not pass through the first notch and the second notch.

10. A developing cartridge, detachably mounted to an imaging device, characterized in that, The developing cartridge includes: The housing is used to contain the toner; The developing roller is rotatably disposed in the housing, and the axis of rotation of the developing roller extends along a first direction; The powder discharge blade as described in any one of claims 1-9 is fixedly mounted on the housing and is used to adjust the thickness of the toner layer on the surface of the developing roller; A driving force receiver, used to receive driving force from the imaging device to drive the rotating component to rotate, and having a rotation axis parallel to a first direction; wherein, The tool holder includes a first part and a second part that are connected to each other. The blade is supported by the first part, and the first part and the second part are L-shaped. When viewed along the first direction, the edge of the tool holder forms a surface M perpendicular to the rotation axis of the driving force receiver, which is located outside this surface.

Images