Developing box

Abstract

The utility model discloses a developing box. The developing box comprises a shell, a developing roller rotatable about a developing roller axis extending in a first direction; the coupling gear can receive driving force outside the developing box, and the coupling gear is located on the first side of the shell in the first direction; a chip having an electrical contact surface; the device is characterized in that the device comprises a cover plate which extends from a first side of the housing to a second side of the housing; the cover plate is closer to the third side of the shell relative to the fourth side of the shell in the second direction; in the second direction, the electric contact surface is closer to the fourth side of the shell than the cover plate, and the electric contact surface and the cover plate are arranged at an interval in the second direction; according to the developing box disclosed by the utility model, the contact area between the developing box and paper is increased, so that the paper is not easy to wrinkle when being extruded, characters or images output on the paper are clearer in the subsequent transfer printing process, and the printing quality is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of electrophotographic imaging, especially to a developing box. BACKGROUND

[0002] The prior art discloses a developing box, the developing box is installed in a drum box and can be installed into an imaging device together with the drum box, the developing box includes a developing roller that can carry a developer, the drum box includes a photosensitive drum that can generate an electrostatic latent image, in a specific printing process, the developing roller and the photosensitive drum are in contact with each other, the developer carried on the developing roller can be transported to the photosensitive drum to develop the electrostatic latent image of the photosensitive drum, then, paper is in contact with the photosensitive drum through the guidance of a plurality of rib portions arranged along the length direction of the developing box and arranged at intervals at the bottom of the developing box, through the transfer of a transfer roller and the fixation of a fixing roller, the text or image existing on the photosensitive drum is transferred to the paper, finally, the imaging device outputs the paper carrying the text or image, so that the printing process is completed.

[0003] However, since the rib portions are arranged at intervals along the length direction of the developing box, the paper is prone to wrinkle after being squeezed during the movement and contact with the rib portions, which will affect the subsequent transfer process and cause the problem that the text or image on the paper is not clear. UTILITY MODEL CONTENT

[0004] To solve the above problems, the utility model provides a new developing box, which is mainly realized by the following technical scheme:

[0005] A developing box includes:

[0006] A housing can accommodate a developer, the housing has a first side and a second side arranged separately in a first direction, and the housing has a third side and a fourth side arranged separately in a second direction;

[0007] A developing roller can rotate around a developing roller axis extending in the first direction, and the developing roller is located at the third side of the housing in the second direction;

[0008] A coupling gear can receive a driving force from outside of the developing box, and the coupling gear is located at the first side of the housing in the first direction;

[0009] A chip has an electrical contact surface, and the electrical contact surface is located at the first side of the housing in the first direction;

[0010] Further including a cover plate, the cover plate extends from the first side of the housing to the second side of the housing;

[0011] The cover plate is closer to the third side of the housing than to the fourth side of the housing in the second direction.

[0012] In the second direction, the electric contact surface is closer to the fourth side of the housing than the cover plate, and the electric contact surface is spaced apart from the cover plate in the second direction.

[0013] Further, in a third direction intersecting the first direction and the second direction, the cover plate comprises a first side surface and a second side surface, the first side surface is arranged close to one side of the housing, and the second side surface is away from the housing, and the second side surface is configured as a convex surface.

[0014] Further, the housing further comprises a rib, the rib is arranged on the lower surface of the housing in the third direction intersecting the first direction and the second direction.

[0015] The rib comprises a plurality of ribs, and a plurality of ribs are positioned farther away from the first side of the housing than the electric contact surface in the first direction, and the cover plate can cover a plurality of ribs.

[0016] Further, the cover plate comprises a first cover plate body portion, a second cover plate body portion, and a bending portion connecting the first cover plate body portion and the second cover plate body portion, and the first cover plate body portion and the second cover plate portion are arranged intersecting each other.

[0017] Further, the bottom of the housing is recessed upward to form a groove, and the cover plate extends upward to form a limiting rib, and the limiting rib cooperates with the groove.

[0018] Further, at least a portion of the cover plate coincides with the developing roller in the third direction intersecting the first direction and the second direction.

[0019] Further, the developing cartridge has a glue injection hole, and the glue injection hole is spaced apart from the cover plate in the first direction.

[0020] Further, the cover plate comprises a relief portion, and the relief portion is arranged at a substantially middle position of the cover plate in the first direction.

[0021] Further, the cover plate comprises a first surface and a second surface arranged opposite in the thickness direction, the second surface is arranged to face the outside of the developing cartridge, and the relief portion is configured as a groove recessed from the second surface toward the housing.

[0022] Further, in the first direction, the length of the cover plate in the first direction is L, and 228mm≥L≥217mm.

[0023] Technical effects:

[0024] The utility model discloses a cover plate is arranged at the lower end of developing box and is used to guide paper movement and is structured as a plate, compared with prior art, this increases the contact area of developing box and paper, in the process of developing box and paper contact and guide its movement, make paper not easy to appear wrinkle, also make the output text or image on paper become more clear in the subsequent transfer process, improve the print quality. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 It is the schematic view of developing box in one angle in the embodiment 1 of the utility model;

[0026] Figure 2 It is the schematic view of developing box in another angle in the embodiment 1 of the utility model;

[0027] Figure 3 It is the partial exploded schematic view of developing box in the embodiment 1 of the utility model;

[0028] Figure 4 It is the schematic view of developing box in one angle in the embodiment 1 of the utility model, and the cover plate is separated from developing box;

[0029] Figure 5 It is the schematic view of developing box in another angle in the embodiment 1 of the utility model, and the cover plate is separated from developing box;

[0030] Figure 6 It is the schematic view of developing box in the embodiment 1 of the utility model in the up-down direction's elevation structure;

[0031] Figure 7 It is the schematic view of developing box in the embodiment 1 of the utility model in the up-down direction's plan structure;

[0032] Figure 8 It is the schematic view of developing box in the embodiment 1 of the utility model in the left-right direction's right view structure;

[0033] Figure 9 It is the schematic view of developing box in another angle in the embodiment 2 of the utility model, and the cover plate is separated from developing box;

[0034] Figure 10 It is the schematic view of developing box in still another angle in the embodiment 2 of the utility model, and the cover plate is separated from developing box;

[0035] Figure 11 It is the schematic view of developing box in the left-right direction's left view structure in the embodiment 2 of the utility model;

[0036] Figure 12 It is the utility model Figure 10 Enlarged view of A place;

[0037] Figure 13is a certain angle schematic view of the cover plate in the embodiment 2 of the utility model;

[0038] Figure 14 is a partial structure schematic view of the right end part of the cover plate in the embodiment 2 of the utility model;

[0039] Figure 15 is a partial structure schematic view of the left end part of the cover plate in the embodiment 2 of the utility model;

[0040] Figure 16 is another angle schematic view of the cover plate in the embodiment 2 of the utility model;

[0041] Figure 17 is a certain angle schematic view of the developing box in the embodiment 3 of the utility model;

[0042] Figure 18 is another angle schematic view of the developing box in the embodiment 3 of the utility model;

[0043] Figure 19 is a top view structure schematic view of the developing box in the embodiment 3 of the utility model in the up-down direction;

[0044] Figure 20 is a bottom view structure schematic view of the developing box in the embodiment 3 of the utility model in the up-down direction;

[0045] Figure 21 is a left view structure schematic view of the developing box in the embodiment 3 of the utility model in the left-right direction;

[0046] Figure 22 is a sectional view in the A-A direction of the utility model Figure 20 embodiment 3;

[0047] Figure 23 is a certain angle schematic view of the developing box in the embodiment 3 of the utility model when the cover plate is separated from the developing box;

[0048] Figure 24 is a certain angle three-dimensional structure schematic view of the cover plate in the embodiment 3 of the utility model;

[0049] Figure 25 is an exploded schematic view of the developing box and the cover plate in the embodiment 4 of the utility model;

[0050] Figure 26 is a left view structure schematic view of the developing box in the embodiment 4 of the utility model in the left-right direction;

[0051] Figure 27 is a right view structure schematic view of the developing box in the embodiment 4 of the utility model in the left-right direction;

[0052] Figure 28is the bottom view structure schematic diagram of the developing box in the embodiment 4 of the utility model in the up and down direction;

[0053] Figure 29 is the certain angle schematic diagram of the cover plate in the embodiment 4 of the utility model;

[0054] Figure 30 is the sectional view of the utility model Figure 27 in B-B direction;

[0055] Figure 31 is the three-dimensional structure schematic diagram of the developing box in the embodiment 5 of the utility model;

[0056] Figure 32 is the three-dimensional structure schematic diagram of the developing box another angle in the embodiment 5 of the utility model;

[0057] Figure 33 is the top view structure schematic diagram of the developing box in the embodiment 5 of the utility model in the up and down direction;

[0058] Figure 34 is the right view structure schematic diagram of the developing box in the embodiment 5 of the utility model in the left and right direction;

[0059] Figure 35 is the sectional view structure schematic diagram of the developing box in the embodiment 5 of the utility model in vertical direction;

[0060] Figure 36 is the partial exploded structure schematic diagram of the developing box in the embodiment 5 of the utility model;

[0061] Figure 37 is the exploded structure schematic diagram of the shell in the embodiment 5 of the utility model;

[0062] Figure 38 is the three-dimensional structure schematic diagram of the developing box in the embodiment 6 of the utility model;

[0063] Figure 39 is the three-dimensional structure schematic diagram of the developing box another angle in the embodiment 6 of the utility model;

[0064] Figure 40 is the front view structure schematic diagram of the developing box in the embodiment 6 of the utility model in the front and back direction;

[0065] Figure 41 is the right view structure schematic diagram of the developing box in the embodiment 6 of the utility model in the left and right direction;

[0066] Figure 42 is the sectional view structure schematic diagram of the developing box in the embodiment 6 of the utility model in vertical direction;

[0067] Figure 43 is the three-dimensional structure schematic diagram of the powder bin in the embodiment 6 of the utility model;

[0068] Figure 44 is a perspective structure schematic view of the developing box in the embodiment 7 of the utility model, and

[0069] Figure 45 is another angle of the developing box in the embodiment 7 of the utility model, and

[0070] Figure 46 is the overhead view of the developing box in the embodiment 7 of the utility model in the up-down direction, and

[0071] Figure 47 is the right view of the developing box in the embodiment 7 of the utility model in the left-right direction, and

[0072] Figure 48 is the sectional structure schematic view of the developing box in the embodiment 7 of the utility model in the vertical direction, and

[0073] Figure 49 is the perspective structure schematic view of the powder bin in the embodiment 7 of the utility model. DETAILED DESCRIPTION

[0074] In order to make the purpose of the embodiment of the utility model, technical scheme and technical effect more clearly, the technical scheme of the developing box of the utility model will be clearly and completely described below in conjunction with the 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 the person skilled in the art without creative labor are within the protection scope of the utility model.

[0075] Embodiment 1

[0076] In order to better describe the technical scheme in the utility model, in the following description, as shown in Figure 2 , the developing roller 104 can rotate around the developing roller axis extending in the left-right direction (first direction), and the coupling gear 111 described later is arranged at the left side of the developing box 100 in the left-right direction; The arrangement direction of the handle 101c and the developing roller 104 described later is the front-rear direction (second direction), and the front-rear direction intersects the left-right direction, and the handle 101c is arranged at the rear side of the developing box 100 in the front-rear direction; The up-down direction (third direction) intersects the left-right direction and the front-rear direction. Preferably, the left-right direction, the front-rear direction and the up-down direction are perpendicular to each other.

[0077] As shown in Figures 1-5 , a developing box 100 in the embodiment 1 of the utility model is shown, the developing box 100 can be detachably installed in the drum box, and the two can be together detachably installed to the electrophotographic image forming device (hereinafter referred to as "image forming device") to perform imaging operation, as Figures 1-3As shown, the developing cartridge 100 includes a housing 101, the housing 101 includes a powder tank 101a which can contain developer, and a detachable cover 101b which is mounted on the left side of the powder tank 101a, the rear side of the powder tank 101a in the front-rear direction is provided with a handle 101c, the cover 101b can cover at least part of the gear train in the developing cartridge 100, the gear train of the developing cartridge 100 includes but is not limited to a coupling gear 111, a developing roller gear 112, a stirring frame gear 114, a powder feeding roller gear 113 and at least one idler gear 115 for transmitting driving force, the coupling gear 111 is arranged at the left end of the housing 101, and includes a coupling part 111a and a gear part 111b, the coupling part 111a can be coupled with the driving member (not shown) of the image forming device to receive driving force from the image forming device, the gear part 111b is integrally arranged with the coupling part 111a, and can be meshingly connected with the developing roller gear 112, the powder feeding roller gear 113 and the idler gear 115, the developing roller gear 112 can receive driving force of the coupling gear 111 to rotate around the developing roller gear axis which extends in the left-right direction, the powder feeding roller gear 113 can receive driving force of the coupling gear 111 to rotate around the powder feeding roller gear axis which extends in the left-right direction, and the stirring frame gear 114 can receive driving force of the coupling gear 111 through the idler gear 115 to rotate around the stirring frame gear axis which extends in the left-right direction. The developing cartridge 100 further includes a stirring frame 102, a powder feeding roller 103 and a developing roller 104 which are rotatably supported on the housing 101, the left end of the stirring frame 102, the powder feeding roller 103 and the developing roller 104 respectively penetrates to the left side of the powder tank 101b and is connected with the stirring frame gear 114, the powder feeding roller gear 113 and the developing roller gear 112, the stirring frame 102 can rotate around the stirring frame axis which extends in the left-right direction according to the rotation of the stirring frame gear 114, the powder feeding roller 103 can rotate around the powder feeding roller axis which extends in the left-right direction according to the rotation of the powder feeding roller gear 113, and the developing roller 104 can rotate around the powder feeding roller axis which extends in the left-right direction according to the rotation of the developing roller gear 112. The developing roller 104 is arranged at the front end of the housing 101 in the front-rear direction, when the developing cartridge 100 works, the developing roller 104 needs to be opposite to the photosensitive drum outside the developing cartridge 100, so that the developer on the outer surface of the developing roller 104 can reach the outer surface of the photosensitive drum to realize development. In addition, the stirring frame 102 in the powder tank 101a can prevent the developer from caking by rotating to stir the developer inside the powder tank 101a, on the one hand, and can deliver the developer to the powder feeding roller 103, the powder feeding roller 103 delivers the developer to the developing roller 104 by rotating, and then the developing roller 104 can deliver the developer carried thereon to the photosensitive drum by rotating to develop the latent image on the photosensitive drum. The developing cartridge 100 further includes a powder outlet blade 107 for controlling the thickness of the developer attached to the developing roller 104, the powder outlet blade 107 is located between the powder feeding roller 103 and the developing roller 104 in the front-rear direction.

[0078] As Figures 2-3 shown, the developing cartridge 100 further includes a chip 109 for storing information of the developing cartridge 100, the chip 109 includes an electrical contact surface 109a and a storage portion (not shown), the storage portion and the electrical contact surface 109a are electrically connected, the storage portion is used for recording the model number and other information of the developing cartridge 100, in the state that the developing cartridge 100 is installed to the image forming device, the electrical contact surface 109a can be in contact with and form an electrical connection with an electrical contact point (not shown) inside the image forming device, so that the developing cartridge 100 establishes a communication connection with the image forming device, and the image forming device can read the information of the developing cartridge 100. At the same time, the image forming device can record the information of the developing cartridge 100, when the developer in the developing cartridge 100 is about to be consumed, the image forming device can prompt the user to replace a new developing cartridge 100 through an operation panel or an indicator light.

[0079] Further, as Figure 7 shown, the developing cartridge 100 further includes a support portion 108 for supporting the electrical contact surface 109a, the support portion 108 is fixedly connected to the left side of the cover 101b or the powder tank 101a, specifically, the support portion 108 is fixedly connected to the left side of the cover 101b or the powder tank 101a by an elastic buckle or a screw and the like. In an implementable embodiment, the support portion 108 can also extend from the left side of the cover 101b or the powder tank 101a in the left-right direction. In the front-rear direction, the support portion 108 is closer to the rear side of the housing 101 than to the front side of the housing 101, similarly, the electrical contact surface 109a is closer to the rear side of the housing 101 than to the front side of the housing 101 in the front-rear direction, such a configuration makes the distance between the electrical contact surface 109a and the electrical contact portion 105a of the electrode 105 farther, avoiding the interference between the chip 109 and the electrode 105.

[0080] As Figure 6 shown, the developing cartridge 100 has a plurality of ribs 101e, each of the plurality of ribs 101e protrudes outward from the outer surface of the housing 101 in the up-down direction, specifically, each of the plurality of ribs 101e protrudes outward from the powder tank 101a in the left-right direction. Therefore, the powder tank 101 includes a plurality of ribs 101e, each of the plurality of ribs 101e extends in the front-rear direction. The plurality of ribs 101e are arranged with each other in the left-right direction. Specifically, the plurality of ribs 101e are arranged with intervals in the left-right direction. The plurality of ribs 101e are positioned closer to the right end of the housing 101 than the electrical contact surface 109a in the left-right direction, the plurality of ribs 101e are located at the bottom of the powder tank 101a, when the developing cartridge 100 is used, the plurality of ribs 101e can guide the paper to move to the position between the photosensitive drum and the transfer roller inside the drum cartridge, so that the transfer work of the image forming device can be carried out smoothly.

[0081] Further, as Figure 7As shown, the developing cartridge 100 further comprises a cover plate 120, which is arranged at the bottom of the housing 101 in the up-down direction, and is located at a position capable of contacting the paper. The cover plate 120 is plate-shaped and extends in the left-right direction. The electrical contact surface 109a is located at the left side of the cover plate 120 in the left-right direction, and the cover plate 120 is located at the front end of the electrical contact surface 109a in the front-rear direction. The cover plate 120 is arranged between the electrical contact portion 105a of the electrode 105 and the electrical contact surface 109a of the chip 109 in the left-right direction. During the operation of the developing cartridge 100, the cover plate 120 is arranged to contact the paper, and through the contact with the paper, the cover plate 120 can guide the paper to a position between the photosensitive drum and the transfer roller (not shown) in the drum cartridge, thereby achieving the function of guiding the movement of the paper.

[0082] Further, the size of the cover plate 120 in the left-right direction is greater than the size of the paper in the left-right direction, so as to ensure the contact between the cover plate 120 and the paper and reduce the paper jam rate. Figure 9 As shown, in the present embodiment, the cover plate 120 is separately arranged with the housing 101, and is detachably mounted on the housing 101 and arranged to cover the plurality of ribs 101e so that the plurality of ribs 101e are not exposed outside the developing cartridge 100. Specifically, the cover plate 120 comprises a cover plate main body 121 which can be used to cover the plurality of ribs 101e and is plate-shaped. The cover plate main body 121 has a first surface 120a and a second surface 120b which are respectively arranged at opposite sides in the thickness direction of the cover plate main body 121. The first surface 120a is concave, and the second surface 120b is convex. In other words, when the cover plate 120 is mounted on the developing cartridge 100, the first surface 120a faces the housing 101, and the second surface 120b is exposed outside the developing cartridge 100 and can contact the paper during the movement of the paper and be used to guide the movement of the paper to avoid the paper from being jammed. The cover plate main body 121 is generally "L"-shaped in projection in the left-right direction. The cover plate main body 121 comprises a first cover plate main body 121a and a second cover plate main body 121b which are arranged in intersecting directions. The width of the first cover plate main body 121a is greater than the width of the second cover plate main body 121b. An arc-shaped bending portion 121c is further connected between the first cover plate main body 121a and the second cover plate main body 121b. The bending portion 121c can make the transition between the first cover plate main body 121a and the second cover plate main body 121b more stable, and avoid problems such as a large gap at the joint between the two.

[0083] Further, as shown, Figure 4 and Figure 7As shown, the cover plate 120 further comprises an avoiding portion 123 for avoiding the imaging device, the avoiding portion 123 is arranged at the substantially middle position of the length direction (left-right direction) of the cover plate 120, and is configured to penetrate at least a portion of the first cover plate body 121a and at least a portion of the second cover plate body 121b, that is, the avoiding portion 123 is a through hole formed on the cover plate 121, when the developing cartridge 100 is installed in the imaging device, the avoiding portion 123 can avoid the knob in the imaging device, so that the knob can enter into the avoiding portion 123, and the installation interference between the cover plate 120 and the knob is prevented when the cover plate 120 is installed in the imaging device; alternatively, the avoiding portion 123 can also be a groove formed on the cover plate 120, and the groove is configured as a groove recessed from the second surface 120b of the cover plate 120 towards the rib 101e.

[0084] As shown in the drawings, Figure 5 In order to facilitate the installation and positioning of the cover plate 120 on the developing cartridge 100, the side (the first surface 120a) of the cover plate 120 close to the shell 101 is provided with a positioning portion 122, specifically, the cover plate 120 is provided with a group of positioning portions 122 on each side in the left-right direction, and each group of positioning portions 122 is arranged in the front-rear direction; preferably, the positioning portion 122 is configured as a positioning column, and correspondingly, the bottom of the shell 101 is provided with a positioning hole corresponding to the positioning column on the cover plate 120; when the cover plate 120 is installed on the shell 101, the cover plate 120 can be accurately positioned on the shell 101 through the cooperation of the positioning column and the positioning hole, so as to facilitate the installation of the cover plate 120. Similarly, the positioning portion 122 on the cover plate 120 can also be configured as a positioning hole, and correspondingly, the bottom of the shell 101 is provided with a positioning column corresponding to the positioning hole on the cover plate 120; of course, the structure of the positioning portion of the cover plate 120 and the positioned portion of the shell 101 is not limited to the cooperation structure between the positioning column and the positioning hole, as long as it can position the cover plate 120 on the shell 101.

[0085] Further, the edge of the cover plate 120 close to the side of the shell 101 is attached to the bottom of the shell 101; the cover plate 120 can be further installed on the shell 101 by means of adhesive or ultrasonic welding, so as to prevent the cover plate 120 from falling off the shell 101, and ensure the installation stability of the cover plate 120.

[0086] Embodiment 2

[0087] Next, the embodiment 2 in the utility model will be introduced in detail in combination with the drawings, Figures 9-16 The same parts as the above embodiment 1 will not be repeated here, and the difference between the developing cartridge 100 in the embodiment and the above embodiment 1 is that the structure of the developing cartridge 100 and the cover plate 130 in the embodiment are different from those in the above embodiment 1. As shown in the drawings, Figures 9-11As shown, in this embodiment, the developing cartridge 100 also includes a forced push protrusion 106, which can receive external force to make the developing roller 104 in close contact with the photosensitive drum in the drum box (not shown). In the front-to-back direction, the cover plate 130 is spaced apart from the forced push protrusion 106, and the cover plate 130 is closer to the developing roller 104 than the forced push protrusion 106.

[0088] Furthermore, such as Figures 12-13 As shown, the cover plate 130 has a protrusion 133 on one side in the left-right direction to prevent the cover plate 130 from falling off the housing 101. Correspondingly, the housing 101 has an opening 133a on the bottom side in the up-down direction that cooperates with the protrusion 133. When the cover plate 130 is connected to the housing 101, the protrusion 133 on the cover plate 130 cooperates with the opening 133a on the housing 101 to fix the cover plate 130 to the bottom of the housing 101. Preferably, the protrusion 133 is constructed as an elastic buckle.

[0089] Furthermore, such as Figure 10 and Figure 14 As shown, in another embodiment of this invention, the cover plate 130 further includes a positioning hole 134 disposed on one side in the left-right direction. Correspondingly, a positioning part 134a is disposed on the bottom side of the housing 101, which mates with the positioning hole 134 on the cover plate 130. Specifically, the positioning hole 134 is configured as a screw hole for mounting screws, and the positioning part 134a is correspondingly configured as a screw post. The developing cartridge 100 also includes screws 135 that mate with the aforementioned screw hole and screw post and are used to connect the cover plate 130 and the housing 101.

[0090] Alternatively, in the developing cartridge 100 of this utility model, the connection between the cover plate 130 and the housing 101 can be configured as a detachable connection by screws 135 or elastic buckles (protrusions 133), or it can be configured as a fixed connection by adhesive or ultrasonic welding; these are not limited, as long as the cover plate 130 is stably fixed to the bottom of the housing 101.

[0091] Preferred, such as Figures 15-16 As shown, there may be two or more positioning holes 134, which are provided on both sides of the cover plate 130 in the left-right direction. There may also be two or more protrusions 133, which are provided on both sides of the cover plate 130 in the left-right direction. More specifically, in the second surface 130b of the cover plate 130, the positioning holes 134 are located outside the paper contact portion 130b1 of the cover plate 130, so as to avoid the positioning holes 134 interfering with the paper during the paper transportation process and causing the imaging device to jam.

[0092] Example 3:

[0093] Next, we will combine the appendix Figures 17-24The embodiment 3 of the utility model is introduced in detail, the same part as above-mentioned embodiment 1-2, here will not repeat, the difference lies in, the structure of developing box 100 and cover plate 140 in this embodiment are different from above-mentioned embodiment 1-2. Figures 17-18 Another developing box 100 of the utility model is shown in the middle, the developing box 100 is provided with a cover plate 140, which is arranged at the bottom of the shell 101 in the up-down direction and is used to cover the rib 101e arranged at the bottom of the shell 101, the rib 101e is arranged at the front end of the shell 101 in the front-back direction, accordingly, the cover plate 140 is close to the front end of the shell 101 in the front-back direction. The front end of the powder bin 101a in the front-back direction is provided with a powder outlet 101d for the developer to leave, the rib 101e is extended downward from the bottom surface of the lower wall of the powder outlet 101d to form, so as to increase the strength of the powder outlet 101d against deformation, the cover plate 140 is covered at the bottom of the rib 101e in the up-down direction, the minimum length of the cover plate 140 in the front-back direction is greater than the maximum length of the rib 101e in the front-back direction, the strength of the powder outlet 101d is further strengthened by the arrangement of the cover plate 140, and the occurrence of the developer leakage caused by the deformation of the sidewall of the powder outlet 101d during the use of the developing box 100 is avoided.

[0094] As shown in Figures 23-24 , the cover plate 140 includes a first surface 140a facing the powder bin 101a and a second surface 140b arranged opposite to the first surface 140a, the cover plate 140 extends upward at both sides in the left-right direction to form a connecting plate 142, the connecting plate 142 can be connected with the bottom of the powder bin 101a to prevent the cover plate 140 from falling off the powder bin 101a, the cover plate 140 is fixedly connected to the bottom of the powder bin 101a, specifically, the cover plate 140 is fixedly connected to the bottom of the powder bin 101a by ultrasonic welding, the cover plate 140 can also be fixedly connected to the bottom of the powder bin 101a by an adhesive or a buckle. Figure 24 As shown in , the first surface 140a of the cover plate 140 is provided with a limiting groove 144, the limiting groove 144 is formed by a plate 144a extending upward from the first surface 140a, and the limiting groove 144 can cooperate with the rib 101e on the powder bin 101a to limit the position of the cover plate 140 relative to the powder bin 101a in the left-right direction.

[0095] As shown in

[0096] , the bottom of the powder bin 101a and the cover plate 140 are further provided with a hole 143 and a column 101f for positioning, specifically, the hole 143 penetrates from the first surface 140a to the second surface 140b of the cover plate 140, and the column 101f extends downward from the bottom of the powder bin 101a in the up-down direction. Figures 19-21As shown, the developing cartridge 100 further comprises a detected protrusion 150 which is movable relative to the housing 101, the detected protrusion 150 is located at the right end of the housing 101 in the left-right direction, the detected protrusion 150 is farther away from the left end of the housing 101 than the cover plate 140 in the left-right direction, the detected protrusion 150 is closer to the rear end of the housing 101 than the cover plate 140 in the front-rear direction, that is, the detected protrusion 150 is arranged away from the cover plate 140, reducing the influence of the movement of the detected protrusion 150 on the powder outlet 101d, and reducing the risk of developer leakage. The developing cartridge 100 further comprises electrodes 105, the electrodes 105 all have an electrical contact portion 105a connected with the imaging device, in the embodiment, the detected protrusion 150 is integrally formed with the electrodes 105, that is, the electrical contact portion 105a is farther away from the left end of the housing 101 than the cover plate 140 in the left-right direction, the electrical contact portion 105a is closer to the rear end of the housing 101 than the cover plate 140 in the front-rear direction, and the electrical contact portion 105a is farther away from the cover plate 140 than the rotation axis A1 of the coupling gear 111.

[0097] As shown in the accompanying drawings, Figure 22 In the front-rear direction, the cover plate 140 is located on the front side of the rotation axis A2 of the powder feeding roller 103, and the cover plate 140 is arranged to replace the function of the reinforcing ribs arranged on the rear side of the rotation axis A2 of the powder feeding roller 103 in the prior art, that is, in the embodiment, the ribs 101e are located on the front side of the rotation axis A2 of the powder feeding roller 103 in the front-rear direction, which simplifies the structure of the powder tank 101a and reduces the production cost of the powder tank 101a.

[0098] Alternatively, when the ribs 101e are arranged on the front side and the rear side of the rotation axis A2 of the powder feeding roller 103 in the front-rear direction, in order to further strengthen the strength of the powder tank 102, the cover plate 140 can extend a longer distance in the front-rear direction to adapt to the length of the ribs 101e in the front-rear direction; alternatively, the cover plate 140 can be arranged in a split manner, and the cover plate 140 can comprise a front cover plate and a rear cover plate, the front cover plate is used to cover the ribs 101e located on the front side of the rotation axis A2 of the powder feeding roller 103 in the front-rear direction, and the rear cover plate is used to cover the ribs 101e located on the rear side of the rotation axis A2 of the powder feeding roller 103 in the front-rear direction, so as to realize the separate covering of the ribs 101e.

[0099] Embodiment 4:

[0100] Next, the embodiment 4 in the utility model will be introduced in detail in combination with the accompanying drawings, Figures 25-30 The same parts as those in the above-mentioned embodiments 1-3 will not be described here, and the difference lies in that the structure of the developing cartridge and the cover plate arranged on the developing cartridge in the embodiment are different from those in the above-mentioned embodiments 1-3. Figures 24-28A developing box 100 of embodiment 4 of the present application is shown in the figure, the developing box 100 is provided with a cover plate 160 for covering ribs 101e at the bottom of a powder tank 101a, the cover plate 160 is arranged at the bottom of the shell 101 in the up-down direction. Specifically, the developing box 100 has a first forced pushing protrusion 106a and a second forced pushing protrusion 106b, the first forced pushing protrusion 106a is located at the left side of the developing box 100 in the left-right direction, and the second forced pushing protrusion 106b is located at the right side of the developing box 100 in the left-right direction; the developing box 100 further comprises a separation protrusion 110, the separation protrusion 110 can receive a force outside the developing box 100 and drive the developing roller 104 to move from a first position to a second position, the first position is configured as a position where the developing roller 104 contacts the photosensitive drum inside the drum box, and the second position is configured as a position where at least a part of the developing roller 104 is separated from the photosensitive drum inside the drum box; specifically, the separation protrusion 110 is arranged at the left side of the developing box 100 in the left-right direction, and the separation protrusion 110 is arranged at the left side of the cover 101b in the left-right direction and extends in the left-right direction; optionally, the separation protrusion 110 can also extend outward from the outside of the cover 101b; observed from the left side in the left-right direction, the first forced pushing protrusion 106a is farther away from the rotation axis of the developing roller 104 than the separation protrusion 110 in the front-rear direction, in the present embodiment, the first forced pushing protrusion 106a is integrally formed with the separation protrusion 110, optionally, the first forced pushing protrusion 106a and the separation protrusion 110 are integrally formed with the cover 101b. The second forced pushing protrusion 106b is made of conductive material, in the present embodiment, the second forced pushing protrusion 106b can also serve as an electrode for receiving power outside the developing box 100, and the second forced pushing protrusion 106b is electrically connected to at least one of the powder outlet knife 107, the developing roller 104 and the powder feeding roller 103. The developing box 100 further comprises a locking portion 101h, in the state that the developing box 100 is installed to the drum box, the locking portion 101h can cooperate with the locking member inside the drum box to prevent the developing box 100 from falling off the drum box, in the left-right direction, the locking portion 101h is located at the right side of the shell 101, and in the front-rear direction, the locking portion 101h is close to the rear side of the shell 101.

[0101] The bottom of the powder tank 101a extends outwardly a plurality of ribs 101e for improving the structural strength of the powder tank 101a, such as Figure 29As shown, the cover plate 160 has an inner wall 160a close to the powder bin 101a and an outer wall 160b away from the powder bin 101a, the inner wall 160a of the cover plate 160 extends upward to form a limiting rib 161, and the limiting rib 161 is arranged adjacent to the rib 101e in the left-right direction in the state that the cover plate 160 is installed to the powder bin 101a; further, the limiting rib 161 is provided with at least two, at least one limiting rib 161 is located on the left side of one rib 101e in the left-right direction, and at least another limiting rib 161 is located on the right side of another rib 101e in the left-right direction. The inner wall 160a of the cover plate 160 further extends upward to form a protrusion 162 as an energy guide body, the protrusion 162 as the energy guide body is used to absorb energy during ultrasonic welding and melt at high temperature generated by energy, so that the cover plate 160 is fixedly connected with the powder bin 101a, and in the state that the cover plate 160 is installed to the powder bin 101a, the protrusion 162 can be in contact with the rib 101e, and optionally, the protrusion 162 protrudes on one side of the limiting rib 160 in the left-right direction, that is, the protrusion 162 is arranged on the side of the limiting rib 161 close to the rib 101e; in this way, the cover plate 160 can be connected with the rib 101e through the protrusion 162, so that the cover plate 160 is fixedly connected to the bottom of the powder bin 101a.

[0102] Specifically, the cover plate 160 is provided with at least a first limiting rib 161a and a second limiting rib 161b, and the first limiting rib 161a and the second limiting rib 161b are arranged adjacent to the rib 101e in the state that the cover plate 160 is connected with the powder bin 101a, the first limiting rib 161a is located on the right side of the cover plate 160 in the left-right direction, and the second limiting rib 161b is located on the left side of the cover plate 160 in the left-right direction; in this embodiment, as shown, Figure 30 in the state that the cover plate 160 is connected with the powder bin 101a, the first limiting rib 161a is located on the left side of one rib 101e, and the second limiting rib 161b is located on the right side of the rib 101e, so that the movement of the cover plate 160 relative to the powder bin 101a is limited in the left-right direction; further, the bottom of the powder bin 101a is upwardly recessed to form a groove 101i, the groove 101i extends in the left-right direction, and the rib 101e is arranged inside the groove 101i, and in the state that the cover plate 160 is connected with the powder bin 101a, the limiting rib 161 is located inside the groove 101i, so that the movement of the cover plate 160 relative to the powder bin 101a is limited in the left-right direction; it is convenient for the production and manufacturing personnel to position the cover plate 160 on the powder bin 101a at the correct position before welding.

[0103] As shown, Figure 28As shown, the bottom of the toner cartridge 101a in the developing cartridge 100 is also provided with a glue injection hole 101g for injecting adhesive into the toner cartridge 101a to facilitate the assembly of the developing cartridge 100. A cover plate 160 is separated from the glue injection hole 101g in the left-right direction to prevent the cover plate 160 from blocking the glue injection hole 101g. The cover plate 160 extends from the left side to the right side of the housing 101 in the left-right direction, and the maximum distance between the cover plates 160 in the left-right direction is L, where 228mm ≥ L ≥ 217mm, preferably, L = 223.5mm.

[0104] like Figures 28-29 As shown, the cover plate 160 has an identification part on one side in the left-right direction to help production personnel quickly identify the left and right ends of the cover plate 160, thereby improving production efficiency; in this embodiment, the cover plate 160 has an identification hole 163 as an identification part on the left side in the left-right direction.

[0105] like Figure 28 As shown, in the front-rear direction, the electrical contact surface 109a and the locking part 101h are provided on the rear side of the housing 101, and the cover plate 160 is provided on the front side of the housing 101. The cover plate 160 is separated from the electrical contact surface 1109a, the separation protrusion 110, the first forced push protrusion 106a, the locking part 101h and the second forced push protrusion 106b in the left-right direction, thereby reducing the interference of the cover plate 160 on other components on the developing cartridge 100.

[0106] Example 5:

[0107] Next, we will combine the appendix Figures 31-37 The present invention will now describe in detail Embodiment 5. Embodiment 5 provides a developing cartridge. The similarities between the developing cartridge in this embodiment and the developing cartridge in Embodiment 1 above will not be repeated here. The difference is that the structure of the developing cartridge 200 in this embodiment is different from that in Embodiments 1-4 above.

[0108] like Figures 31-37 As shown, a developer cartridge 100 of this utility model is illustrated. The developer cartridge 100 can be detachably installed to the drum cartridge and can be detachably installed together with the drum cartridge to an electrophotographic imaging device (hereinafter referred to as "imaging device", not shown in the figure). Specifically, multiple developer cartridges 100 are detachably installed inside the imaging device; preferably, four developer cartridges 100 are detachably installed inside the imaging device, and the interiors of the four developer cartridges 100 respectively contain black, cyan, magenta and yellow developer.

[0109] The developing cartridge 100 comprises a housing 101, the housing 101 has a first side and a second side separated from each other in the left-right direction, and the housing 101 comprises a third side and a fourth side separated from each other in the front-rear direction. The present embodiment takes the left side of the developing cartridge 100 as the first side, and the right side of the developing cartridge 100 as the second side. Figure 31 The front side of the developing cartridge 100 is the third side, and the rear side of the developing cartridge 100 is the fourth side. Figure 31 The front side of the developing cartridge 100 is the third side, and the rear side of the developing cartridge 100 is the fourth side. Figure 31 The front side of the developing cartridge 100 is the third side, and the rear side of the developing cartridge 100 is the fourth side. Figure 31 The front side of the developing cartridge 100 is the third side, and the rear side of the developing cartridge 100 is the fourth side.

[0110] The developing cartridge 100 further comprises a guiding protrusion 121, a separating protrusion 122 and a pushing protrusion 123. At least a part of the guiding protrusion 121 coincides with the developing roller 102 in the left-right direction; during the process of installing the developing cartridge 100 into the drum cartridge, the guiding protrusion 121 of the developing cartridge 100 can cooperate with a guiding groove (not shown) on the drum cartridge to guide the developing cartridge 100 to be installed into the interior of the drum cartridge. The separating protrusion 122 is closer to the developing roller 102 than the rotation axis A1 of the coupling gear 111 in the front-rear direction (as shown in Figure 33 the separating protrusion 122 of the developing cartridge 100 can receive the force applied by the separating member in the drum cartridge, so that the separating protrusion 122 drives the developing cartridge 100 to move in the direction that makes the developing roller 102 move backward in the front-rear direction, i.e. in the direction that makes the developing roller 102 separate from the photosensitive drum in the drum cartridge; when the developing cartridge 100 does not participate in the imaging operation, the developing cartridge 100 can realize the separation of the developing roller 102 and the photosensitive drum to avoid the static friction between the developing roller 102 and the photosensitive drum and cause the damage of the two. The pushing protrusion 123 is farther away from the developing roller 102 than the coupling gear 111 and the electric contact surface 106a in the front-rear direction; in the state that the developing cartridge 100 is installed into the drum cartridge, the pushing protrusion 123 can receive the force provided by the pushing part in the drum cartridge, so that the developing roller 102 is in close contact with the photosensitive drum in the interior of the drum cartridge, to ensure the stable imaging quality of the imaging device during the imaging operation, and to improve the imaging quality of the imaging device.

[0111] In order to make the development agent from the inside of the shell 101 to the outside of the transport more smoothly, while preventing the development agent from spilling due to the deformation of the shell 101 during the transport and use of the development agent, the inside of the shell 101 is provided with a plurality of ribs 118 arranged in the left and right directions, the plurality of ribs 118 are configured to extend inwardly from the bottom inner surface of the shell 101, the plurality of ribs 118 extend in the front and rear directions; and the plurality of ribs 118 are positioned closer to the second side of the shell 101 than the electrical contact surface 106a in the left and right directions. The ribs 118 improve the strength of the shell 101, thereby preventing the development agent from spilling due to the deformation of the powder bin 101a.

[0112] As Figure 32 shown, compared with the prior art, the bottom of the shell 101 is no longer provided with ribs, that is, the outer surface of the bottom of the shell 101 is not provided with ribs between the first side and the second side in the left and right directions, the outer surface of the developing cartridge 100 is more smooth and beautiful, and the outwardly extending protrusions on the outer surface of the developing cartridge 100 are reduced, thereby reducing the collision of the developing cartridge 100 during packaging and transportation and the interference with the internal components of the image forming device during the installation of the developing cartridge 100 to the image forming device.

[0113] Further, as Figure 35 and Figure 37 shown, the powder bin 101a includes a first cavity 101a1 and a second cavity 101a2; the first cavity 101a1 is located rearward of the second cavity 101a2 in the front and rear directions, the stirring frame 104 is located inside the first cavity 101a1, and the powder feeding roller 103 is located inside the second cavity 101a2. The ribs 118 include front ribs 118a and rear ribs 118b arranged in the front and rear directions, the front ribs 118a and the rear ribs 118b are respectively extended from the front wall and the rear wall of the second cavity 101a2; the front ribs 118a are located forward of the powder feeding roller axis A2 in the front and rear directions, and the rear ribs 118b are located rearward of the powder feeding roller axis A2 in the front and rear directions, that is, the front ribs 118a, the powder feeding roller axis A2 and the rear ribs 118b are arranged in the front and rear directions in sequence.

[0114] Embodiment 6:

[0115] Next, the embodiment 6 in the utility model will be described in detail in combination with the accompanying Figures 38-43 drawings, and the embodiment 6 provides a developing cartridge. For the developing cartridge of the embodiment, the same as the developing cartridge in the above-mentioned embodiment 1, the embodiment will not be described again, and the difference is that the structure of the developing cartridge 200 in the embodiment is different from that in the above-mentioned embodiments 1-5.

[0116] As Figures 38-43As shown in the figure, the developing cartridge 200 includes a housing 201, the housing 201 has a first side and a second side separated from each other in the left-right direction, the housing 201 has a third side and a fourth side separated from each other in the up-down direction; the housing 201 has a fifth side and a sixth side separated from each other in the front-rear direction. As Figure 39 As shown in the figure, the housing 201 includes a powder bin 201a and a cover 201b, the powder bin 201a is provided with a handle 201c on the sixth side in the front-rear direction, and the handle 201c is located on the fourth side in the up-down direction; the cover 201b covers at least part of the gear train, the gear train includes a coupling gear 211, the coupling gear 211 is located on the first side of the housing 201 in the left-right direction; the coupling gear 211 can be connected with a driving member (not shown) in the imaging device to receive the driving force of the imaging device and drive the developing roller 202, the powder feeding roller 203 and the stirring frame 204 to rotate around the axis extending in the left-right direction.

[0117] The developing cartridge 200 is provided with a separation protrusion 222 on at least one side in the left-right direction, the separation protrusion 222 can receive the force of the imaging device to drive the developing cartridge 200 to move in the direction of separating the developing roller 202 from the photosensitive drum; in this embodiment, the separation protrusion 222 drives the developing cartridge 200 to move from bottom to top after being stressed to realize the separation of the developing roller 202 from the photosensitive drum.

[0118] As Figure 39 and Figure 41 As shown in the figure, the second side of the developing cartridge 200 in the left-right direction is provided with a storage chip 206 for storing information of the developing cartridge 200, the storage chip 206 includes a storage part (not shown) and an electrical contact surface 206a, in this embodiment, the electrical contact surface 106a faces the direction of the sixth side of the housing 201 in the front-rear direction.

[0119] Embodiment 7:

[0120] Next, the embodiment 7 in the utility model will be described in detail in combination with the accompanying Figures 44-49 Embodiment 7 provides a developing cartridge, for the same developing cartridge of embodiment 1-6, this embodiment will not be described again, the difference of the developing cartridge 300 in this embodiment is that the structure of the developing cartridge 300 in this embodiment is different from the above-mentioned embodiment 1-6. As Figures 44-48As shown, the developing cartridge 300 includes a housing 301 having a first side and a second side separated from each other in the left-right direction, and a third side and a fourth side separated from each other in the front-rear direction, and a developing roller 302 is located at the third side of the housing 301. The first side of the housing 301 is provided with a gear train, a first guided protrusion, a first separated protrusion 322, a first forced protrusion 323, and a storage chip 306, and the second side of the housing 301 is provided with a second separated protrusion 332, a second forced protrusion 332, a locked protrusion 309, and an electrode 305. The gear train includes, but is not limited to, a coupling gear 311 for receiving driving force of an image forming device and driving the developing roller 302, a powder feeding roller 303, and a stirring frame 304 to rotate. In the present embodiment, as shown in Figure 44 and Figure 46 The first guided protrusion, the first separated protrusion 322, and the first forced protrusion 323 are integrally formed into a first protrusion 320, and the first protrusion 320 is closer to the developing roller 302 than a rotation axis Al of the coupling gear 311 in the front-rear direction. The storage chip 306 includes a storage part (not shown) and an electrical contact surface 306a, and the electrical contact surface 306a is farther away from the developing roller 302 than the rotation axis Al of the coupling gear 311 in the front-rear direction.

[0121] As shown in Figures 45-47 The second separated protrusion 332 is closer to the fourth side of the housing 301 in the front-rear direction, and can receive force of the image forming device to drive the developing cartridge 300 to move in a direction separating the developing roller 302 from the photosensitive drum, so that separation of the developing roller 302 from the photosensitive drum can be achieved. The locked protrusion 309 is closer to the fourth side of the housing 301 than the third side in the front-rear direction, and is farther away from the developing roller 302 than the second separated protrusion 332 in the front-rear direction, and the locked protrusion 309 can cooperate with a locking rod (not shown) in a drum cartridge to prevent the developing cartridge 300 from automatically separating from the drum cartridge in a state that the developing cartridge 300 is installed in the drum cartridge. The second forced protrusion 333 is integrally formed with the electrode 305, and the second forced protrusion 333 and the electrode 305 are closer to the developing roller 302 than the coupling gear 111 in the front-rear direction.

[0122] As shown in Figures 48-49As shown, the shell 301 comprises a first cavity 301a1 and a second cavity 301a2, the stirring frame 304 is located inside the first cavity 301a1, and the powder feeding roller 303 is located inside the second cavity 301a2; The inner surface of the second cavity 301a2 is provided with a plurality of ribs 318 arranged in the left and right directions, and the plurality of ribs 118 are configured to extend upward in the up and down direction from the bottom inner surface of the shell 101; The ribs 318 are arranged to improve the strength of the shell 101, thereby preventing the developer from overflowing due to the deformation of the shell 301; And a connecting column 319 is arranged between the first cavity 301a1 and the second cavity 301a2 to further strengthen the strength of the shell 301, so as to avoid the deformation of the shell 301.

[0123] Advantages

[0124] The utility model discloses a cover plate for guiding paper movement and being configured as a plate is arranged at the lower end of the developing box, which increases the contact area of the cover plate and the paper compared with the prior art. In the process of contact and guiding movement of the cover plate and the paper, even if the paper is squeezed, it is not easy to wrinkle. Therefore, the output text or image on the paper will be clearer in the subsequent transfer process, and the printing quality is improved.

[0125] The above embodiments are only used to illustrate the technical solutions of the utility model, and not to limit them. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part of the technical features. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the utility model.

Claims

1. A developing cartridge comprising: a housing containing a developer, the housing having a first side and a second side disposed apart in a first direction, the housing having a third side and a fourth side disposed apart in a second direction; a developing roller rotatable about a developing roller axis extending in the first direction, the developing roller being located at the third side of the housing in the second direction; a coupling gear configured to receive a driving force from outside of the developing cartridge, the coupling gear being located at the first side of the housing in the first direction; a chip having an electrical contact surface, the electrical contact surface being located at the first side of the housing in the first direction; a cover plate extending from the first side of the housing to the second side of the housing; the cover plate being closer to the third side of the housing than to the fourth side of the housing in the second direction; the electrical contact surface being spaced apart from the cover plate in the second direction closer to the fourth side of the housing than to the cover plate in the second direction.

2. The process cartridge according to claim 1, wherein the cover plate including a first side surface and a second side surface in a third direction intersecting the first direction and the second direction, the first side surface being disposed closer to one side of the housing, the second side surface being disposed farther from the other side of the housing, the second side surface being configured as a convex surface.

3. The process cartridge of claim 1, wherein, the housing further including a rib disposed on a lower surface of the housing in the third direction intersecting the first direction and the second direction; the rib including a plurality of ribs positioned farther from the first side of the housing than the electrical contact surface in the first direction, the cover plate covering the plurality of ribs.

4. The process cartridge of claim 1, wherein, the cover plate including a first cover plate body portion, a second cover plate body portion, and a bent portion connecting the first cover plate body portion and the second cover plate body portion, the first cover plate body portion and the second cover plate portion being disposed intersecting each other.

5. The process cartridge of claim 1, wherein, a bottom of the housing being concave upward to form a groove, the cover plate extending upward to form a limiting rib, the limiting rib cooperating with the groove.

6. The process cartridge of claim 1, wherein, at least a portion of the cover plate coincides with the developing roller in projection in the third direction intersecting the first direction and the second direction.

7. The process cartridge of claim 1, wherein, the developing cartridge having a glue injection hole, the glue injection hole being spaced apart from the cover plate in the first direction.

8. The process cartridge of claim 1, wherein, the cover plate including a relief portion disposed at approximately a middle position of the cover plate in the first direction.

9. The process cartridge of claim 8 wherein, the cover plate including a first surface and a second surface disposed opposite each other in a thickness direction, the second surface being disposed facing outside of the developing cartridge, the relief portion being configured as a groove concave from the second surface toward the housing.

10. The developer cartridge of claim 1, wherein, a length of the cover plate in the first direction is L, where 228 mm ≥ L ≥ 217 mm in the first direction.

Images