Developing box
By setting the electrodes and forced pushing protrusions into separate structures in the developing box, and making bearing parts and forced pushing protrusions using non-conductive materials, the problem of high costs in the prior art resulting in the use of conductive materials for bearing parts in the prior art is solved, and the effect of reducing production costs and improving economics is achieved.
Patent Information
- Application Number
- CN202421550219.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Priority Date
- 2023-09-13
- Filing Date
- 2024-07-02
- Publication Date
- 2025-04-25
- Estimated Expiration
- 2034-07-02
AI Technical Summary
In the existing development boxes, the bearing parts are made of conductive materials, resulting in high manufacturing costs and poor economicality.
By setting the electrode and forced pushing protrusion into a split structure, the bearing parts and forced pushing protrusions are made of a non-conductive material, and the electrodes are only made of conductive materials.
Reduces the use of conductive materials, reduces production and manufacturing costs, and improves economicality.
Smart Images
Figure CN222801001U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of electronic photographic imaging, in particular to a developing box. Technical Background
[0002] The developer cartridge is a consumable used in electronic photographic imaging devices. In order to improve the imaging quality of the developer cartridge, the electronic photographic imaging device needs to supply power to the developing roller and the powder feeding roller during the imaging process to improve the efficiency of the powder feeding roller and the developing roller in transporting the developer.
[0003] The prior art discloses a developing box, which is provided with a bearing component made of conductive material, the bearing component can be used to support one end of the developing roller in the length direction, the bearing component is provided with a forced pushing portion, and the drum box is provided with a movable forced pushing portion that can contact the forced pushing portion; when the developing box is installed on the drum box, the forced pushing portion applies a forced pushing force to the forced pushing portion to make the developing roller contact with the photosensitive drum, and on the other hand, the bearing component can provide a bias voltage for the developing roller through the contact between the forced pushing portion and the forced pushing portion. However, in the existing developing box, the bearing component is made of conductive material as a whole to meet the requirement of being electrically connected to the developing roller, which greatly increases the cost of manufacturing the bearing component, and the economic efficiency is not high. Utility Model Content
[0004] Therefore, the utility model provides a developing box to solve the above technical problems, which is mainly achieved through the following technical solutions:
[0005] A developing box, comprising:
[0006] A housing for containing a developer, wherein the housing has a first side in a first direction and a second side spaced apart from the first side, and the housing has a third side in a second direction intersecting the first side and a fourth side spaced apart from the third side;
[0007] a developing roller rotatable about a developing roller axis extending in a first direction, the developing roller being closer to a third side of the housing relative to a fourth side of the housing in a second direction;
[0008] a powder feeding roller, rotatable about a powder feeding roller axis extending in a first direction, the powder feeding roller being used to feed the developer to the developing roller;
[0009] A powder knife is used to control the thickness of the developer attached to the outer surface of the developing roller;
[0010] A coupling gear, for receiving an external driving force of the developing cartridge and rotatable about a coupling gear axis extending in a first direction, the coupling gear being located at a first side of the housing in the first direction;
[0011] A chip having an electrical contact surface, the electrical contact surface being located on a first side of the housing in a first direction;
[0012] A forced pushing protrusion has a force receiving surface, the force receiving surface can receive the force outside the developing box to keep the developing roller in contact with the photosensitive drum outside the developing box;
[0013] an electrode having an electrical contact portion, the electrical contact portion being capable of receiving power from outside the developing cartridge and being electrically connected to at least one of the developing roller, the powder feeding roller, and the powder discharge knife;
[0014] the force receiving surface is closer to a third side of the housing in the second direction than a coupling gear axis of the coupling gear;
[0015] In the second direction, the electrical contact portion is spaced apart from the force receiving surface.
[0016] Furthermore, it also includes a force-bearing member, which can receive the force outside the developing box and move relative to the shell;
[0017] The electrical contact portion can move relative to the housing according to the movement of the force receiving member.
[0018] Further, the developing cartridge can be detachably mounted in a drum cartridge having a power supply member;
[0019] The electrical contact is movable relative to the housing from a first position to a second position;
[0020] The first position is configured as a position where the electric contact portion is not in contact with the power supply member, and the second position is configured as a position where the electric contact portion is in contact with the power supply member.
[0021] Further, the electrical contact portion is movable relative to the housing in a first direction.
[0022] Further, projected along the first direction, the force receiving surface electrode is located outside the projection range of the electrode.
[0023] Further, the electrical contact portion is exposed on the second side of the housing in the second direction, and the electrical contact portion is farther away from the second side of the housing than the forced pushing protrusion in the first direction.
[0024] Furthermore, the developing box includes a bracket for supporting the electrical contact portion, and the bracket is formed to extend outward from the second side of the shell.
[0025] Furthermore, when viewed along the second direction, the bracket is in an "L" shape.
[0026] Further, in the second direction, the electrical contact portion is farther from the fourth side of the housing than the force receiving surface.
[0027] Further, in the first direction, the electrical contact portion is arranged on the opposite side of the electrical contact surface.
[0028] The utility model provides a developing box. By arranging the electrode and the forced pushing part into a split structure, the bearing component for supporting the developing roller and the forced pushing part formed on the bearing component can be made of non-conductive material, and only the electrode needs to be made of conductive material. Compared with the prior art, the use of conductive material is reduced, thereby reducing the production cost and achieving higher economy. BRIEF DESCRIPTION OF THE DRAWINGS
[0029] Figure 1 It is a three-dimensional schematic diagram of a drum box in the prior art at a certain angle;
[0030] Figure 2 It is a schematic diagram of a three-dimensional drum box from another angle in the prior art;
[0031] Figure 3 A schematic diagram of the right side structure of a drum cartridge in the prior art;
[0032] Figure 4 It is a three-dimensional structural schematic diagram of the developing box in Embodiment 1 of the present utility model;
[0033] Figure 5 It is a three-dimensional structural schematic diagram of another angle of the developing box in Embodiment 1 of the utility model;
[0034] Figure 6 It is a vertical cross-sectional view of the developing cartridge in Embodiment 1 of the utility model;
[0035] Figure 7 It is a partially exploded schematic diagram of the developing box in Embodiment 1 of the present utility model;
[0036] Figure 8 is a schematic diagram of the positions of the support plate and the sliding rod in the first position state in Embodiment 1 of the present utility model;
[0037] Fig. 9 is a schematic diagram of the positions of the support plate and the sliding rod in the first position state in Embodiment 1 of the present utility model;
[0038] Fig.10 It is a three-dimensional structural schematic diagram of the developing box in Embodiment 2 of the present utility model;
[0039] Fig.11 It is a partially exploded schematic diagram of the developing box in Embodiment 2 of the present utility model;
[0040] Fig.12 It is a schematic diagram of the three-dimensional structure of the support plate in Embodiment 2 of the present utility model;
[0041] Fig.13 It is a three-dimensional structural schematic diagram of the developer cartridge and the drum cartridge in the engaged state in Embodiment 2 of the present utility model;
[0042] Fig.14 It is a schematic diagram of a developing box at a certain angle in Embodiment 3 of the present utility model;
[0043] Fig.15 It is a schematic diagram of another angle of the developing box in Embodiment 3 of the present utility model;
[0044] Fig.16 It is a schematic diagram of the electrode being decomposed from the developing box in Example 3 of the utility model.
[0045] Fig.17 It is a schematic diagram of the developing box in Example 3 of the utility model when the developing roller is in contact with the photosensitive drum;
[0046] Fig.18 It is a schematic diagram of a certain angle of the developing box installed in the drum box in Example 3 of the utility model;
[0047] Fig.19 It is a schematic diagram from another angle showing that the developing box in Embodiment 3 of the present utility model is installed in the drum box. DETAILED DESCRIPTION
[0048] In order to make the purpose, technical scheme and technical effect of the embodiment of the utility model clearer, the technical scheme of the processing box of the utility model will be described clearly and completely in conjunction with the accompanying drawings. Obviously, the described embodiment is only a preferred embodiment of the utility model, not all embodiments. Based on the embodiment of the utility model, other embodiments obtained by those skilled in the art without creative work belong to the protection scope of the utility model.
[0049] like Figure 1-3 As shown, a drum box 50 that cooperates with the developer box 100 of the utility model is shown. The figure shows a developer box 100 of the utility model, and the two can be installed as a whole to an electronic photographic imaging device (hereinafter referred to as "imaging device"). The drum box 50 includes a drum frame 51, a photosensitive drum 52, a locking portion 54 and a pushing portion 55; a developer box accommodating portion 56 formed on the drum frame 51 is used to accommodate the developer box 100, and the photosensitive drum 52 is used to receive a signal from the imaging device and form an electrostatic latent image. The photosensitive drum 52 can be rotatably supported on the drum frame 51 around a photosensitive drum axis extending in the left and right directions; the locking portion 54 is arranged on the upper left side of the drum frame 51, and is used to lock the developer box 100 inside the drum frame 51, thereby preventing the developer box 100 from falling off.
[0050] The pushing portion 55 is disposed at the rear of the drum frame 51, and an elastic member 57 is connected between the pushing portion 55 and the drum frame 52. When the developing cartridge 100 is mounted on the drum cartridge 50, the pushing portion 55 is used to apply a forward pushing force to the developing cartridge 100, so that the developing roller 120 contacts the photosensitive drum 52. The pushing portion 55 includes a first pushing portion 55a and a second pushing portion 55b. The first pushing portion 55a is located on the left side of the drum cartridge 50, and the second pushing portion 55b is located on the right side of the drum cartridge 50.
[0051] The drum cartridge 50 further includes a power supply component, specifically, the power supply component is configured as a metal conductive sheet 60 disposed on the right side of the drum frame 51; the right side of the metal conductive sheet 60 is exposed on the right side of the drum cartridge 50, and when the developing cartridge 100 and the drum cartridge 50 are installed together in the imaging device, the right side of the metal conductive sheet 60 contacts the power supply component (not shown) in the imaging device to receive power from the imaging device; the left side of the metal conductive sheet 60 is exposed to the inner side of the drum frame 51 through a hole 51a. Optionally, at least a portion of the second forced pushing portion 55b may be made of a conductive material, such as a conductive resin, and the second forced pushing portion 55b may be configured to be electrically connected to the metal conductive sheet 60.
[0052] like Figure 4-6As shown, a developing box 100 in an embodiment of the utility model is shown, and the developing box 100 includes a shell 110. The shell 110 includes a powder bin 111 for accommodating developer, and the shell 110 also includes an end cover 112 detachably mounted on one side of the powder bin 111, and the end cover 112 can cover the gear system of the developing box 100, and the gear system includes but is not limited to a driving gear 150, a developing roller gear, a powder feeding roller gear, a stirring frame gear, and a plurality of connecting gears; the driving gear 150 is located at the left end of the developing box 100, and when the developing box 100 is installed in the imaging device, the driving gear 150 is used to receive a driving force so that the driving gear 150 rotates around the axis of the driving gear 150 extending in the left and right directions, and the driving gear 150 can drive the developing roller gear, the powder feeding roller gear, and the stirring frame gear to rotate. Specifically, in the present embodiment, the driving gear 150 is meshed with the powder feeding roller gear, the powder feeding roller gear is meshed with the developing roller gear through the first connecting gear, and the driving gear 150 is meshed with the stirring frame gear through the second connecting gear 152, so that the powder feeding roller gear 121, the developing roller gear 131 and the stirring frame gear can receive the driving force of the driving gear 150 and rotate. The developing box 100 also includes a developing roller 120, a powder feeding roller 130 and a stirring frame 140 supported on the shell 110, and the left ends thereof are respectively connected to the developing roller gear, the powder feeding roller gear and the stirring frame gear 140, and each gear drives the developing roller 120, the powder feeding roller 130 and the stirring frame 140 to rotate around their respective axes extending in the left-right direction, and the developing roller 120 and the stirring frame 140 are arranged in the front-to-back direction, and in the front-to-back direction, the developing roller 120 is arranged at the front end of the stirring frame 140, and the developing roller 120 is located at the front end of the shell 110 in the front-to-back direction. When the developing box 100 is installed on the drum box 50, the developing roller 120 of the developing box 100 contacts the photosensitive drum 52 of the drum box 50 under the action of the pushing portion 55; in the specific operation of the developing box 100, the rotating stirring frame 140 stirs the developer inside the developing box 100 and conveys the developer to the powder feeding roller 130, and the powder feeding roller 130 conveys the developer to the developing roller 120 while rotating, and then the developing roller 120 conveys the developer carried on it to the photosensitive drum through contact with the photosensitive drum 52 to develop the electrostatic latent image on the photosensitive drum 52. A powder discharge knife 117 is provided between the developing roller 120 and the housing 110, and the powder discharge knife 117 is used to control the thickness of the developer on the developing roller 120, so that the developer on the developing roller 120 is more uniform, thereby improving the imaging quality of the developing box 100.
[0053] The developer box 100 also includes a chip frame 170 and a chip 180 supported by the chip frame 170. The chip frame 170 is located at the left side of the shell 110. In one implementation of the present embodiment, the chip frame 170 is located at the left side of the shell 110 and the chip 180 can move relative to the shell 110. In an optional implementation, the chip frame 170 can also be fixedly connected to one side of the shell 110. Specifically, the chip frame 170 is fixedly connected to the left side of the end cover 112 by elastic buckles or screws. The chip frame 170 can also extend from the left side of the end cover 112 from right to left in the left-right direction. The chip frame 170 can extend from the left side of the powder bin 111 from right to left in the left-right direction. The chip 180 includes an electrical contact surface 181 and a storage portion (not shown). The electrical contact surface 181 is exposed at the top of the chip frame 170. When the developing cartridge 100 is installed in the imaging device, the electrical contact surface 181 can be connected to an electrical contact point (not shown) in the imaging device. The storage portion stores information such as the model of the developing cartridge 100, and the storage portion is electrically connected to the electrical contact surface 181. When the developing cartridge 100 is installed in the imaging device, the developing cartridge 100 is electrically connected to the electrical contact point of the imaging device through the electrical contact surface 181 and can read the information in the storage portion, so that the developing cartridge 100 and the imaging device establish a communication link, so that the imaging device can determine the information such as the model of the developing cartridge 100. When the service life of the developing cartridge 100 is about to end, the imaging device can prompt the user to replace the new developing cartridge 100 through a display device such as an operation panel or an indicator light.
[0054] The developing box 100 also includes a separated portion and a forced pushing portion, which are both arranged on both sides of the developing box 100. After the developing box 100 and the drum box 50 are installed together in the imaging device, the separated portion can receive the force of the drum box 50 or the imaging device to keep the developing roller 120 away from the photosensitive drum 52; the forced pushing portion can receive the force of the forced pushing portion 55 in the drum box 50 to keep the developing roller 120 in contact with the photosensitive drum 52. The separated portion includes a first separated portion 113a located on the left side of the developing box 100 and a second separated portion 113b located on the right side of the developing box 100, and the forced pushing portion includes a first forced pushing portion 114a located on the left side of the developing box 100 and a second forced pushing portion 114b located on the right side of the developing box 100; in the front-to-back direction, the first separated portion 113a is closer to the developing roller 120 than the first forced pushing portion 114a, and the second separated portion 113b is farther away from the second forced pushing portion 114b than the driving gear 150, and the projections of the first forced pushing portion 114a and the second forced pushing portion 114b in the left-right direction at least partially overlap. A support plate 115 for rotatably supporting the developing roller 120 and the powder feeding roller 130 is provided on the right side of the shell 110. The first separation portion 113a and the first forced pushing portion 114a are constructed as protrusions extending outward in the left and right directions from the left side of the end cover 112. The second separation portion 113b is constructed as a rod that receives external force and drives the developing roller 120 away from the photosensitive drum 52. The second forced pushing portion 114b is constructed as a protrusion extending outward in the left and right directions from the right side of the support plate 115. The support plate 115 and the second forced pushing portion 114b are made of insulating material. Preferably, the support plate 115 and the second forced pushing portion 114b are made of ABS plastic material.
[0055] like Figure 7-9As shown, in order to realize the electrical connection between the developing roller 120 and the powder feeding roller 130 in the developing box 100 and the drum box 50, the developing box 100 includes a connecting member 160 for realizing the electrical connection. The connecting member 160 is located between the developing roller 120 and the electrical contact surface 181 in the front-to-back direction, and the connecting member 160 and the electrical contact surface 181 are arranged on the left and right sides of the housing 110 opposite to each other in the left-right direction. The connecting member 160 is located on the right side of the housing 110. When performing the imaging operation, the connecting member 160 can be connected to the metal conductive sheet 60 to receive the guide The metal sheet 60 is provided with electricity, and provides electricity to at least one of the developing roller 120, the powder feeding roller 130 and the powder discharge knife 117; specifically, the connecting member 160 penetrates to the left side of the supporting plate 115, and the connecting member 160 includes a sliding rod 161, an elastic part 162, a driving part 163 and an electrical connecting part 164, the sliding rod 161 and the elastic part 162 are located in the through hole 115a that penetrates the supporting plate 115, and the sliding rod 161 can contact with the power supply member outside the developing box 100 to receive the electricity outside the developing box 100. In this embodiment, the sliding rod 161 serves as an electrical contact portion; in the front-to-back direction, the sliding rod 161 is located between the second forced pushing portion 114b and the rotation axis of the developing roller 120, and the sliding rod 161 is spaced apart from the force receiving surface of the second forced pushing portion 114b in the front-to-back direction. The second forced pushing portion 114b is closer to the developing roller 120 than the rotation axis of the driving gear 150 in the front-to-back direction. That is, the sliding rod 161 is closer to the developing roller 120 than the rotation axis of the driving gear 150 in the front-to-back direction. The sliding rod 161 can be slidably connected to the supporting plate 115, and the elastic member 1 62 is connected between the sliding rod 161 and the support plate 115, so that the sliding rod 161 remains in the first position, and the elastic member 162 is preferably configured as a compression spring; the driving portion 163 is used to receive an external force to push the sliding rod 161 to move from the first position to the second position; the first position is configured as a retracted position of the sliding rod 161 to prevent the sliding rod 161 from interfering with the disassembly and assembly of the developing box 100 and the drum box 50; the second position is configured as an extended position of the sliding rod 161, at which time the sliding rod 161 can contact the metal conductive sheet 60 and establish an electrical connection. The electrical connection portion 164 is used to electrically connect the sliding rod 161 to at least one of the developing roller 120, the powder feeding roller 130 and the powder discharge knife 117. In this embodiment, the electrical connection portion 164 is used to electrically connect the sliding rod 161 to the developing roller 120 and the powder feeding roller 130, so as to transmit electricity to the developing roller 120 and the powder feeding roller 130. The electrical connection part 164 and the sliding rod 161 are made of conductive material, and preferably the electrical connection part 164 and the sliding rod 161 are made of metal material.
[0056] The following will explain in detail the process of achieving electrical connection between the developer cartridge 100 and the drum cartridge 50. During the installation of the developer cartridge 100 onto the drum cartridge 50, the force-bearing surface 163a of the drive unit 163 on the side away from the sliding rod 161 in the front-to-back direction abuts against the inner wall 51b of the drum frame 51 and pushes the drive unit 163 to move in the front-to-back direction toward the side close to the sliding rod 161. The side of the drive unit 163 close to the sliding rod 161 in the front-to-back direction is constructed as an inclined surface 163b facing the right front. During the movement of the inclined surface 163b toward the sliding rod 161, the inclined surface 163b contacts the end of the sliding rod 161 close to the housing 110 and pushes the sliding rod. 161 moves and extends toward the right side in the left-right direction; in this way, the sliding rod 161 moves from the first position to the second position farther away from the shell 110 than the first position. At this time, the sliding rod 161 moves away from the shell 110 and contacts the metal conductive sheet 60, so that the developing roller 120 and the powder feeding roller 130 in the developing box 100 establish an electrical connection with the metal conductive sheet 60 of the drum box 50 through the electrical connection part 164 and the sliding rod 161, so that the developing roller 120 and the powder feeding roller 130 can receive the power of the imaging device through the metal conductive sheet 60 to ensure that the developer can be stably transported, thereby effectively improving the printing quality of the developing box 100.
[0057] When the developing box 100 is separated from the drum box 50, the user pulls up the rear end of the developing box 100, and the rear end of the developing box 100 tilts upward under the pulling force, so that the force-bearing surface 163a of the driving part 163 is separated from the abutment with the inner wall 51b of the drum frame 51, and the abutment force on the force-bearing surface 163a disappears. At this time, under the action of the elastic member 162, the sliding rod 161 is separated from the metal conductive sheet 60 and moves from the extended state of the second position to the retracted state of the first position, so as to avoid the sliding rod 161 from interfering with the developing box 100 and the drum box 50, so that the developing box 100 can be easily separated from the drum box 50.
[0058] During the movement of the sliding rod 161 , the moving distance of the sliding rod 161 is L, where L≥2.5 mm.
[0059] Example 2
[0060] Next, we will combine the Figure 9-13The second embodiment of the present invention is described in detail. The second embodiment provides a developing box. The similarities between the developing box of the present embodiment and the developing box in the above embodiment will not be described in detail in the present embodiment. The difference of the embodiment is that the connecting member for receiving power on the developing box is different from that in the above embodiment 1. In the present embodiment, the connecting member 260 includes a first power contact 261 and a second power contact 264. The first power contact 261 is configured as a "U"-shaped or "L"-shaped conductive sheet. The first power contact 261 includes a first end 261a and a second end 261b. 61b, the first end 261a and the second end 261b are spaced apart in the left-right direction, and the first end 261a is farther away from the housing 110 than the second end 261b; when the developing box 100 is installed to the drum box 50, the first end 261a is located outside the drum frame 51 and the second end 261b is located inside the drum frame 51; when the developing box 100 is installed to the imaging device, the first end 261a contacts the power supply component (not shown) in the imaging device to receive the power of the imaging device, and transmits the electricity to the developing roller 120 and the powder feeding roller 130. The second power connector 264 is located between the housing 110 and the support plate 115. The second power connector 264 is used to connect the second end 261b of the connector 261 and at least one of the developing roller 120, the powder feeding roller 130 and the powder discharge knife 117. In the present embodiment, the second power connector 264 is used to connect the second end 261b of the connector 261 and the developing roller 120 and the powder feeding roller 130, so that the connector 261 transmits electricity to the developing roller 120 and the powder feeding roller 130 to ensure that the developer can be stably transported, thereby effectively improving the printing quality of the developing box 100.
[0061] The support plate 115 includes a bracket 115b that cooperates with the first power connector 261. The support 115b extends outward from the right side of the bracket 115b. When viewed in the front-to-back direction, the bracket 115b is in an "L" shape. An opening 115c is provided on the right side of the bracket 115b. The first end 261a of the first power connector 261 is exposed on the right side of the developer box 100 through the opening 115c, so that the first end 261a is connected to the power supply component of the imaging device.
[0062] The developer box 100 of the utility model fixes the chip 180 on one side of the shell 110 so that the relative position of the electrical contact surface 181 of the chip 180 and the shell 110 remains unchanged, thereby avoiding the problem of disconnection between the chip supported thereon and the electrical contacts of the imaging device caused by shaking of the imaging device during the imaging process, and improving the electrical connection stability between the electrical contact surface 181 of the chip 180 and the electrical contacts of the imaging device; in addition, the electrical contact surface 181 of the chip 180 is set at a position away from other structures, reducing the interference that the electrical contact surface 181 may be subjected to during the electrical connection process.
[0063] Example 3
[0064] Next, we will combine the Figure 14-19 Detailed description of Example 3 of the present invention is given below. Example 3 provides a developing box. The similarities between the developing box of this embodiment and the developing box in the above-mentioned embodiments will not be repeated in this embodiment. The difference of the embodiment is that the connecting member for receiving electricity on the developing box is different from that in the above-mentioned embodiments 1-2. In this embodiment, the developing roller 120 includes a developing roller shaft 120a made of, for example, metal and conductive, and a developing layer 120b coated on the outer surface of the developing roller shaft 120a and capable of carrying a developer. When the developing box 100 is installed in the drum box 50, the developing layer 120b maintains contact with the outer surface of the photosensitive drum 52. In addition, the developing box 100 also includes a bearing component 340 arranged at one end of the housing 110. The bearing component 340 is made of a non-conductive material and can rotatably support the end of the developing roller shaft 120a. In addition, in the bearing component 3 A second forced pushing protrusion 114b integrally formed with the bearing component 340 is also provided on the outer surface of 40. In the front-to-back direction, the second forced pushing protrusion 114b is arranged at a position closer to the front end of the shell 110 relative to the rear end of the shell 110. The second forced pushing protrusion 114b is also made of non-conductive material and is constructed so that when the developer box 100 is installed in the drum box 50, the second forced pushing protrusion 55b can contact the second forced pushing protrusion 114b and force the second forced pushing protrusion 114b toward the direction close to the photosensitive drum 52 under the action of the rebound force generated by the elastic member 57, so that the developing roller 120 of the developing box 100 maintains close contact with the photosensitive drum 52, thereby avoiding printing quality problems such as "whitening" during printing. It is worth mentioning that in some embodiments, the second forced pushing protrusion 114b can also be used to support the developing roller shaft 120a.
[0065] Moreover, the developing box 100 also includes an electrode 350 which can be electrically connected to the developing roller 120, that is, the electrode 350 is made of a conductive material, and the electrode 350 is arranged at the right end of the shell 110, which allows the electrode 350 to be as far away from the electrical contact surface 181 arranged on the chip 180 as possible, so as to avoid mutual interference between the bias voltages received by the two and affect the electrical contact stability of the two; the electrode 350 includes a second part 350b and a first part 350a extending backward from the second part 350b, at least a part of the first part 350a is farther from the developing roller shaft 120a than the second part 350b is from the developing roller shaft 120a, and when viewed in the left and right directions, the electrode is in the shape of a "6", and when the developing box 100 is installed in the drum box 50, the electrode 350 is arranged so that the first part 350a contacts the movable member 30, and the second part 350b of the electrode 350 is arranged so as to contact the developing roller shaft 120a, that is, when the developing box 100 is installed When installed in the drum box 50 and installed together in the imaging device, the imaging device, the movable component of the drum box 50, the electrode 350 of the developer box 100 and the developer roller shaft 120a are electrically connected to each other. In this way, the imaging device can provide a bias voltage to the developer roller shaft 120a, and the developer contained in the shell 110 can be attracted by the electrostatic force generated by the bias voltage and adhere to the developing layer 120b of the developer roller 120. Furthermore, under the premise that the second forced pushing protrusion 114b is forced by the second forced pushing protrusion 55b toward the direction close to the photosensitive drum 52 so that the developer roller 120 maintains close contact with the photosensitive drum 52, the second forced pushing protrusion 55b can also be electrically connected to the developer roller 120 through the first part 350a of the contact electrode 350. The developer roller 120 can transport the developer carried thereon to the photosensitive drum 52 on which the electrostatic latent image has been generated, and develop it into a developer image on the photosensitive drum 52. Finally, the developer image is transferred to the paper through the transfer device to complete the printing process.
[0066] Furthermore, the second portion 350b of the electrode 350 is provided with a hole 350b1 extending in the left-right direction, and the hole 350b1 can be sleeved on the developing roller shaft 120a to support and electrically contact the developing roller shaft 120a, which will greatly improve the contact stability between the electrode 350 and the developing roller shaft 120a.
[0067] Furthermore, a limiting portion 341a is provided on the shell 110, and at least a portion of the electrode 350 can be snapped onto the limiting portion 341a of the shell 110 to limit the rotation of the electrode 350 when the developing roller shaft 120a rotates, thereby avoiding the problem of unstable electrical contact between the electrode 350 and the movable component after the rotation of the electrode 350; preferably, the limiting portion 341a is constructed as a groove formed on the second forced pushing protrusion 114b, and at least a portion of the electrode 350 can be matched and inserted into the groove. The limiting structure is relatively simple and can simplify the structure of the developing box 100.
[0068] Furthermore, in order to avoid mutual interference between the electrode 350 and the second forced pushing protrusion 114b, and also to prevent the electrode 350 from being deformed and damaged by being pushed and squeezed by the second forced pushing protrusion 55b, the first portion 350a of the electrode 350 is spaced apart from the second forced pushing protrusion 114b. Specifically, the second forced pushing protrusion 55b has a forced pushing surface 55b1 facing the photosensitive drum 52, and the forced pushing surface 55b1 is used to force the second forced pushing protrusion 114b toward the photosensitive drum 52, and does not face the surface of the photosensitive drum 52. The surface is a non-pushing surface 55b2, and the first part 350a of the electrode 350 is separated from the pushing surface 55b1 and abuts against the non-pushing surface 55b2. Preferably, the non-pushing surface 55b2 is an electrical connection surface arranged at the end of the second pushing protrusion 55b, and the electrical connection surface is arranged to not face the photosensitive drum 52, so that when the second pushing protrusion 55b contacts the electrode 350, the electrode 350 is not subjected to a pushing force toward the direction close to the photosensitive drum 52, thereby avoiding deformation and damage of the electrode 350 due to being pushed and squeezed by the second pushing protrusion 55b.
[0069] Furthermore, in order to improve the electrical contact stability between the electrode 350 and the second pushing protrusion 55b, the first part 350a is constructed as an elastic arm extending outward from the second part 350b. The elastic arm can be a structure such as a spring sheet or a torsion spring. When the first part 350a of the electrode 350 is subjected to force, it can be elastically deformed to ensure the contact stability between the two. When the developing box 100 is installed in the drum box 50, the rebound force generated by the deformation of the first part 350a of the electrode 350 will force the first part 350a to lean against the movable member 350a, and the two will be in an elastic contact state, thereby improving the electrical contact stability between the electrode and the movable member.
[0070] Furthermore, the first part 350a of the electrode 350 is made of, for example, metal material, which ensures the strength of the electrode 350. Under the premise that the structure allows, the elastic deformation will become larger, further improving the electrical contact stability between the electrode and the movable component. In other embodiments, the first part 350a of the electrode 350 can also be made of plastic or other materials, which is not limited.
[0071] Beneficial Effects
[0072] The utility model provides a developing box. By arranging the electrode and the forced pushing protrusion into a split structure, the bearing component for supporting the developing roller and the forced pushing protrusion formed on the bearing component can be made of non-conductive material, and only the electrode needs to be made of conductive material. Compared with the prior art, the use of conductive material is reduced, thereby reducing the production cost and achieving higher economy.
[0073] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims
1. A developing box, comprising: A housing for containing a developer, wherein the housing has a first side in a first direction and a second side spaced apart from the first side, and the housing has a third side in a second direction intersecting the first side and a fourth side spaced apart from the third side; a developing roller rotatable about a developing roller axis extending in the first direction, the developing roller being closer to the third side of the housing relative to the fourth side of the housing in the second direction; a powder feeding roller, rotatable about a powder feeding roller axis extending in the first direction, the powder feeding roller being used to transport the developer to the developing roller; A powder knife, used for controlling the thickness of the developer attached to the outer surface of the developing roller; a coupling gear for receiving an external driving force of the developing cartridge and rotatable about a coupling gear axis extending in the first direction, the coupling gear being located on the first side of the housing in the first direction; a chip having an electrical contact surface, the electrical contact surface being located on the first side of the housing in the first direction; a forced pushing protrusion having a force receiving surface, the force receiving surface being capable of receiving a force from the outside of the developing cartridge to keep the developing roller in contact with the photosensitive drum outside the developing cartridge; It is characterized by further comprising: an electrode having an electrical contact portion, the electrical contact portion being capable of receiving power from outside the developing cartridge and being electrically connected to at least one of the developing roller, the powder feeding roller, and the powder discharge knife; the force receiving surface being closer to the third side of the housing than the coupling gear axis of the coupling gear in the second direction; In the second direction, the electrical contact portion is spaced apart from the force receiving surface.
2. The developing cartridge according to claim 1, characterized in that: Also included is a force receiving member, the force receiving member can receive the force outside the developing box and move relative to the housing; The electrical contact portion can move relative to the housing according to the movement of the force receiving member.
3. The developing cartridge according to claim 1, characterized in that: The developing cartridge can be detachably mounted in a drum cartridge having a power supply member; The electrical contact is movable from a first position to a second position relative to the housing; The first position is configured as a position where the electric contact portion is not in contact with the power supply member, and the second position is configured as a position where the electric contact portion is in contact with the power supply member.
4. The developing cartridge according to claim 1, wherein: The electrical contact is movable in the first direction relative to the housing.
5. The developing cartridge according to claim 1, wherein: Projected along the first direction, the force receiving surface electrode is located outside the projection range of the electrode.
6. The developing cartridge according to claim 1, characterized in that: The electrical contact portion is exposed at the second side of the housing in the second direction, and the electrical contact portion is farther from the second side of the housing than the forced push protrusion in the first direction.
7. The developing cartridge according to claim 1, characterized in that: The developing box includes a bracket for supporting the electric contact portion, and the bracket is formed to extend outward from the second side of the shell.
8. The developing cartridge according to claim 7, wherein: When viewed along the second direction, the bracket is in an "L" shape.
9. The developing cartridge according to claim 1, wherein: In the second direction, the electrical contact is further away from the fourth side of the housing than the force receiving surface.
10. The developing cartridge according to claim 1, wherein: In the first direction, the electrical contact portions are arranged on opposite sides of the electrical contact surface.