Developing box

Abstract

The utility model discloses a developing box which can be detachably arranged on a drum box provided with a lifting component, a forced pushing part and a photosensitive drum, the developing cartridge includes: a housing; a developing roller rotatable about an axis of the developing roller extending in a first direction; a coupling gear; a forced pushing part; the lifted part can receive the force of the lifting component in a state that the developing box is mounted on the drum box so as to drive the developing box to move from a first position to a second position relative to the drum box; the developing box and the drum box are respectively provided with the locking component and the lifted part, the locking component comprises the lifting part, and when the developing box is disassembled from the drum box, the lifting part applies lifting force to the lifted part so as to push the developing box to be disassembled from the drum box, so that the developing box and the drum box are convenient to disassemble and assemble.

Description

Technical Field

[0001] The utility model relates to the technical field of electrophotographic imaging, and particularly relates to a developing cartridge. Background Art

[0002] A developing cartridge is a consumable that can be detachably installed in an image forming device. The image forming device uses the principle of electro-optical imaging to form a desired image on an imaging medium. When the developer contained in the developing cartridge is exhausted, the image forming device will prompt the end user to replace the developing cartridge.

[0003] In the prior art, a developing cartridge is disclosed, which needs to be pre-installed in a drum holder provided with a photosensitive drum. The two form a processing cartridge, and then the processing cartridge is installed in a laser printer. A plurality of limiting structures are provided in the drum cartridge to prevent the developing cartridge from falling out of the drum cartridge by itself; however, the limiting structures will increase the difficulty of disassembling and assembling the developing cartridge and the drum cartridge, thereby reducing the user experience, which is not desired by the manufacturers of the developing cartridge and the drum cartridge. Summary of the Utility Model

[0004] Therefore, the present utility model provides a developing cartridge to solve the above technical problems, which is mainly achieved through the following technical solutions:

[0005] A developing cartridge that can be detachably installed in a drum cartridge having a lifting member, a pushing portion, and a photosensitive drum. The photosensitive drum can rotate around a photosensitive drum axis extending in the length direction of the drum cartridge. The developing cartridge includes:

[0006] A housing for containing developer. The housing has a first side in a first direction and a second side spaced from the first side. The housing has a third side in a second direction and a fourth side spaced from the third side;

[0007] A developing roller that can rotate around a developing roller axis extending in the first direction. In the second direction, the developing roller is closer to the third side than the fourth side;

[0008] A coupling gear having a coupling portion. The coupling portion can receive a driving force outside the developing cartridge to rotate around a coupling gear axis extending in the first direction;

[0009] Characterized in that it further includes:

[0010] A pushed portion that can receive the force of the pushing portion to make the developing roller close to the photosensitive drum. The pushed portion is closer to the developing roller than the coupling gear in the second direction;

[0011] The lifted part, in a state where the developing cartridge is installed in the drum cartridge, the lifted part can receive the force of the lifting member to drive the developing cartridge to move from a first position to a second position relative to the drum cartridge;

[0012] The forced push part has a force receiving surface for receiving the force, and the pushing part has a force applying surface that cooperates with the force receiving surface;

[0013] In the first position, the force receiving surface contacts the force applying surface in a width direction that intersects the length direction;

[0014] In the second position, the force receiving surface is farther from the photosensitive drum than the force applying surface in the width direction.

[0015] Furthermore, the lifted part is closer to the third side of the housing than the fourth side of the housing in the second direction.

[0016] Furthermore, it further includes a chip, the chip has an electrical contact surface, and the electrical contact surface is farther from the coupling gear than the lifted part in the second direction.

[0017] The developing cartridge, characterized in that it further includes a bracket for supporting the electrical contact surface, and the bracket is fixedly installed on the first side of the housing.

[0018] Furthermore, it further includes a support part, which is closer to the third side of the housing than the coupling gear in the second direction;

[0019] In the first position, the support part does not contact the drum cartridge; in the second position, the support part contacts the drum cartridge.

[0020] Furthermore, in the second position, the included angle between the width direction of the drum cartridge and the second direction of the developing cartridge is α, where 60° ≤ α ≤ 85°.

[0021] Furthermore, it further includes a guiding part and a support part, and in the second position, the support part contacts the drum cartridge;

[0022] The guiding part is closer to the third side of the housing than the support part in the second direction;

[0023] When observed along the first direction, the guiding part coincides with at least a part of the developing roller.

[0024] Furthermore, it further includes a locking part, which is used to prevent the developing cartridge from detaching from the drum cartridge in a state where the developing cartridge is installed in the drum cartridge;

[0025] The locking part is close to the second side of the housing in the first direction, and the locking part is close to the fourth side of the housing in the second direction.

[0026] Furthermore, a support part is further included. In the second position, the support part contacts the drum cartridge.

[0027] The locking part is farther from the support part than the lifting part in the second direction.

[0028] Furthermore, a support part is further included. In the second position, the support part contacts the drum cartridge.

[0029] When the developing cartridge is placed horizontally in the second direction and the developing roller is close to above the housing:

[0030] In a third direction perpendicular to the second direction, the lifted part is located below the support part.

[0031] The developing cartridge and the drum cartridge of the present utility model are respectively provided with a locking member and a lifted part. The locking member includes a lifting part. When the developing cartridge is disassembled from the drum cartridge, the lifting part applies a lifting force to the lifted part to push the developing cartridge out of the drum cartridge, facilitating the disassembly and assembly of the developing cartridge and the drum cartridge. Description of the Drawings

[0032] Figure 1 is a perspective structural view of the drum cartridge of the present utility model;

[0033] Figure 2 is another perspective structural view of the drum cartridge of the present utility model;

[0034] Figure 3 is yet another perspective structural view of the drum cartridge of the present utility model;

[0035] Figure 4 is a perspective structural view of the developing cartridge of the present utility model;

[0036] Figure 5 is another perspective structural view of the developing cartridge of the present utility model;

[0037] Figure 6 is a vertical cross-sectional view of the developing cartridge of the present utility model;

[0038] Figure 7 is a schematic diagram of the installation and locking state of the developing cartridge and the drum cartridge of the present utility model;

[0039] Figure 8 is a schematic diagram of the installation and unlocking state of the developing cartridge and the drum cartridge of the present utility model;

[0040] Figure 9 This is a schematic diagram showing the separated state of the installation of the developing cartridge and the drum cartridge of the present utility model. Detailed implementation manners

[0041] In order to make the objectives, technical solutions and technical effects of the embodiments of the present utility model clearer, the technical solutions of the processing cartridge of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only preferred embodiments of the present utility model, rather than all embodiments. Based on the embodiments of the present utility model, other embodiments obtained by those skilled in the art without creative efforts all fall within the protection scope of the present utility model.

[0042] As Figures 1-3 shown, a drum cartridge 50 cooperating with the developing cartridge 100 of the present utility model is shown. The two can be installed as a whole into an electrophotographic imaging device (hereinafter referred to as "imaging device"). The drum cartridge 50 includes a drum frame 51, a photosensitive drum 52, a locking member 54 and a pushing portion 55. The drum frame 51 is used to accommodate the developing cartridge 100. The photosensitive drum 52 is used to receive signals from the imaging device and form an electrostatic latent image. The photosensitive drum 52 is rotatably supported on the drum frame 51 around a photosensitive drum axis extending in the length direction.

[0043] The pushing portion 55 is arranged at the rear side of the drum frame 51 in the width direction. When the developing cartridge 100 is installed 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 in the length direction, and the second pushing portion 55b is located on the right side of the drum cartridge 50 in the length direction.

[0044] The drum cartridge 50 further includes a power supply component. Specifically, as Figure 2As shown, the power supply component includes a conductive sheet 60 disposed on the right side of the drum frame 51 and an electrical connection member 61 disposed inside the second pushing portion 55b. The electrical connection member 61 is integrally formed with the second pushing portion 55b. That is to say, the electrical connection member 61 can move together with the second pushing portion 55b. The electrical connection member 61 is exposed on the front side of the pushing portion 55b. The electrical connection member 61 includes a protrusion 61a protruding into the second pushing portion 55b; at least a part of the conductive sheet 60 in the length direction is located on the right side of the second pushing portion 55b and the electrical connection member 61, and at least a part of the conductive sheet 60 coincides with the electrical connection member 61 when viewed in the length direction; the conductive sheet 60 is mounted on the right side wall of the drum frame 51, and the right side of the conductive sheet 60 is exposed on the right side of the drum cartridge 50. When the drum cartridge 50 is installed into the imaging device, the right side of the 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 conductive sheet 60 is exposed to the inside of the drum frame 51 through a hole 51a extending in the width direction, and the above-mentioned protrusion 61a extends into the hole 51a and contacts the conductive sheet 60, so that the electrical connection member 61 is electrically connected to the conductive sheet 60; in the state where the developing cartridge 100 is installed into the drum cartridge 50, the developing roller 120 and the powder feeding roller 130 in the developing cartridge 100 are respectively electrically connected to the electrical connection member 61 to receive the power provided by the imaging device; both the conductive sheet 60 and the electrical connection member 61 are made of conductive materials. Preferably, the guiding sheet 60 is made of a conductive metal material, and the electrical connection member 61 is made of a conductive resin material.

[0045] As Figure 2 shown, the guiding grooves 53 are provided on both sides of the drum frame 51 and can guide the developing cartridge 100 to be installed into the drum cartridge 50. The guiding grooves 53 extend from the lower rear of the drum cartridge 50 to the upper front. In the width direction, the guiding grooves 53 are located between the photosensitive drum 52 and the pushing portion 55; in the length direction, the guiding grooves 53 coincide with at least a part of the pushing portion 55; the guiding grooves 53 include an upper surface 53a, a lower surface 53b, and an opening 53c facing the rear and the upper side. The locking member 54 is provided above the left side of the drum frame 51; the locking member 54 includes an operating portion 54a, a locking portion 54b, a lifting portion 54c, and an elastic member for keeping the locking member 54 in the locked state; the operating portion 54a can receive an external force to drive the locking member 54 to move from the locked state to the unlocked state; the locking portion 54b is used to lock the developing cartridge 100 inside the drum frame 51 to prevent the developing cartridge 100 from falling off; the lifting portion 54c is used to apply a force to the developing cartridge 100 to lift the developing cartridge 100 from the drum cartridge 50, facilitating the user to take the developing cartridge 100.

[0046] As Figures 4-6As shown, a developing cartridge 100 in an embodiment of the present invention is shown. The developing cartridge 100 includes a housing 110. The housing 110 has a first side and a second side spaced from the first side in the left-right direction (the first direction), and a third side and a fourth side spaced from the third side in the front-back direction (the second direction). In this embodiment, the first side is described as the left side, the second side as the right side, the third side as the front side, and the fourth side as the rear side. The housing 110 includes a main body 111 for accommodating a developer and an end cap 112 detachably mounted on one side of the main body 111. The end cap 112 can cover the gear train of the developing cartridge 100. The gear train 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 cartridge 100. When the developing cartridge 100 is installed in an 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-right direction. The driving gear 150 can drive the developing roller gear, the powder feeding roller gear, and the stirring frame gear to rotate. Specifically, in this embodiment, the driving gear 150 meshes with the powder feeding roller gear, the powder feeding roller gear meshes with the developing roller gear through a first connecting gear, and the driving gear 150 meshes with the stirring frame gear through a 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 cartridge 100 further includes a developing roller 120, a powder feeding roller 130, and a stirring frame 140 supported on the housing 110. The left ends of the developing roller 120, the powder feeding roller 130, and the stirring frame 140 in the left-right direction are respectively connected to the developing roller gear, the powder feeding roller gear, and the stirring frame gear 140. 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. The developing roller 120 is located at the front end of the housing 110 in the front-back direction. When the developing cartridge 100 is installed in the drum cartridge 50, under the action of the pressing portion 55, the developing roller 120 of the developing cartridge 100 contacts the photosensitive drum 52 of the drum cartridge 50. In the specific operation of the developing cartridge 100, the rotating stirring frame 140 stirs the developer inside the developing cartridge 100 and conveys the developer to the powder feeding roller 130. The powder feeding roller 130 conveys the developer to the developing roller 120 while rotating. Furthermore, the developing roller 120 conveys the developer carried thereon to the photosensitive drum through its contact with the photosensitive drum 52 to develop the electrostatic latent image on the photosensitive drum 52.

[0047] The developing cartridge 100 further includes a chip holder 170 and a chip 180 supported by the chip holder 170. The chip holder 170 and the chip 180 are located on the left side of the housing 110. In one implementable embodiment of the present embodiment, the chip holder 170 and the chip 180 can move relative to the housing 110. Optionally, in other implementable embodiments of the present embodiment, the chip holder 170 can also be fixedly connected to one side of the housing 110. Specifically, the chip holder 170 can be formed by extending from the left side of the end cap 112 from right to left in the left-right direction. In yet another implementable embodiment, the chip holder 170 can be formed by extending from the left end of the housing body 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 fixedly exposed on the top of the chip holder 170. The electrical contact surface 181 can be connected to the electrical contact points in the imaging device. Information such as the model, capacity, newness or oldness, and maximum number of printed pages of the developing cartridge 100 is stored in the storage portion, 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 points (not shown) of the imaging device through the electrical contact surface 181 so as to be able to read the information in the storage portion, enabling the developing cartridge 100 to establish a communication link with the imaging device, thereby enabling the imaging device to determine information such as the model, capacity, newness or oldness, and maximum number of printed pages 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.

[0048] The developing cartridge 100 further includes a guiding portion 116, a separating portion 113, and a pushing portion 114. The guiding portion 116, the separating portion 113, and the pushing portion 114 are all disposed on both sides of the developing cartridge 100. After the developing cartridge 100 and the drum cartridge 50 are installed together in the imaging device, the guiding portion 116 is located inside the guiding groove 53 to limit the movement of the developing cartridge 100 inside the drum cartridge 50. The separating portion 113 can receive the force of the drum cartridge 50 or the imaging device to move the developing roller 120 away from the photosensitive drum 52. The pushing portion 114 can receive the force of the pushing portion 55 in the drum cartridge 50 to keep the developing roller 120 in contact with the photosensitive drum 52. The guiding portion 116 includes a first guiding portion 116a located on the left side of the developing cartridge 100 and a second guiding portion 116b located on the right side of the developing cartridge 100. The separating portion includes a first separating portion 113a located on the left side of the developing cartridge 100 and a second separating portion 113b located on the right side of the developing cartridge 100. The pushing portion includes a first pushing portion 114a located on the left side of the developing cartridge 100 and a second pushing portion 114b located on the right side of the developing cartridge 100. The first guiding portion 116a and the second guiding portion 116b are configured as protrusions extending in the left-right direction. When observed from the left-right direction, at least a part of the first guiding portion 116a, the second guiding portion 116b, and the developing roller 120 overlap. In the front-back direction, the first separating portion 113a is closer to the developing roller 120 than the first pushing portion 114a. The second separating portion 113b is farther from the driving gear 150 than the second pushing portion 114b. At least a part of the projections of the first pushing portion 114a and the second pushing portion 114b in the left-right direction overlap. A support plate 115 for supporting the developing roller 120 and the powder feeding roller 130 is provided on the right side of the housing 110. The first separating portion 113a and the first pushing portion 114a are configured as protrusions extending outward in the left-right direction from the left side of the end cap 112. The second separating portion 113b is configured as a rod for receiving an external force and driving the developing roller 120 away from the photosensitive drum 52. The second pushing portion 114b is configured as a protrusion extending outward in the left-right direction from the right side of the support plate 115. Optionally, in other implementable embodiments, the first guiding portion 116a, the first pushing portion 114a, and the first separating portion 113a are integrally formed. The second guiding portion 116b and the second pushing portion 114b are integrally formed.

[0049] Further, in the state where the developing cartridge 100 is installed in the drum cartridge 50, the second pushing portion 114b is located on the front side of the second pushing portion 55b and in contact therewith, as Figure 7As shown, the second forced pushing portion 114b has a force receiving surface for receiving force, and the second pushing portion 55b has a force applying surface that cooperates with the force receiving surface. At this time, the force receiving surface is closer to the photosensitive drum 52 than the force applying surface in the width direction of the drum cartridge 50; the second forced pushing portion 114b and the support plate 115 are made of a conductive material. Preferably, the second forced pushing portion 114b and the support plate 115 are made of a conductive resin material. The support plate 115 is in contact with the developing roller 120 and the powder feeding roller 130, so that the support plate 115 establishes an electrical connection with the developing roller 120 and the powder feeding roller 130; when the developing cartridge 100 and the drum cartridge 50 are installed in the imaging device together for an imaging operation, the electric power in the imaging device is transmitted to the developing roller 120 and the powder feeding roller 130 in the developing cartridge 100 through the drum cartridge 50 to ensure that the developer can be stably transported, thereby effectively improving the printing quality of the developing cartridge 100.

[0050] The front end portion of the developing cartridge 100 is provided with cooperating support protrusions 117 with the drum frame 51. There are two support protrusions 117, and the two support protrusions 117 are respectively arranged on the left and right sides of the housing 101 in the left-right direction. At the same time, the two support protrusions 117 extend from both sides of the housing 101 in the left-right direction; the right side of the developing cartridge 100 is provided with a locked portion 118 and a lifted portion 119; in the front-rear direction, both the locked portion 118 and the lifted portion 119 are farther from the developing roller 120 than the second separated portion 113b. In the state where the developing cartridge 100 is installed on the drum cartridge 50, the locked portion 118 cooperates with the locking portion 54b of the locking member 54 to prevent the developing cartridge 100 from detaching from the drum cartridge 50.

[0051] As Figures 7-9 shown, when the developing cartridge 100 needs to be removed from the drum cartridge 50, the user presses down the operating portion 54a in the locking member 54. Under the action of the pressing force, the locking portion 54b and the lifting portion 54c in the locking member 54 rotate upward around the rotation pivot of the locking member 54, so that the locking member 54 moves from the locked state to the unlocked state, and the user can take out the developing cartridge 100 from the drum cartridge 50. At the same time, in this process, when the lifting portion 54c rotates upward, the housing 110 of the developing cartridge 100 abuts against and pushes the developing cartridge 100 to move upward and tilt, so that the developing cartridge 100 moves from the locked state to the unlocked state. In the unlocked state of the developing cartridge 100, the support protrusion 117 contacts the drum frame 51 of the drum cartridge 50. Specifically, at this time, as Figure 9The shown support protrusion is in contact with the guiding portion 53; further, during the upward rotation, the lifting portion 54c contacts the portion to be lifted 119 and continues to apply a lifting force to the portion to be lifted 119, so that the lower developing cartridge 100 continues to tilt upward until it is in a separated state. At this time, the forced pushing portion 114 of the developing cartridge 100 moves from in front of the forced pushing portion 55 of the drum cartridge 50 to above the forced pushing portion 55. That is to say, in the unlocked state, the support protrusion 117 of the developing cartridge 100 is supported on the guiding portion 53 of the drum cartridge 50, and the forced pushing portion 114 of the developing cartridge 100 is supported on the forced pushing portion 55 of the drum cartridge 50. At this time, as Figure 9 shown, the force receiving surface is farther from the photosensitive drum than the force applying surface in the width direction. The included angle α between the extending direction Q1 (front-back direction) of the housing 110 in the developing cartridge 100 and the extending direction Q2 (width direction of the drum cartridge 50) of the drum frame 51 in the drum cartridge 50 is less than or equal to 85° and greater than or equal to 60° (60° ≤ α ≤ 85°) to facilitate the user to take out the developing cartridge 100 from the drum cartridge 50.

[0052] When the developing cartridge 100 is installed on the drum cartridge 50, the support protrusion 117 is located above the drum frame 51. During the upward tilting of the developing cartridge 100, the support protrusion 117 is supported between the drum frame 51 and the developing cartridge 100, so that the developing cartridge 100 can rotate upward around the support protrusion 117, and thus the guiding portion 116 of the developing cartridge 100 can be separated from the guiding groove 53, facilitating the separation of the developing cartridge 100 from the drum cartridge 50.

[0053] Further, to enable the user to lift the developing cartridge 100 to the separated position at one time, the portion to be lifted 119 is formed by extending in the up-down direction from the bottom of the housing 101, and the lower end of the portion to be lifted 119 is farther from the electrical contact surface 181 than the forced pushing portion 114 in the up-down direction.

[0054] 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 foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and 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 present invention.

Claims

1. A developing cartridge that can be detachably mounted to a drum cartridge having a lifting member, a pushing portion, and a photosensitive drum, the photosensitive drum being rotatable about a photosensitive drum axis extending in the longitudinal direction of the drum cartridge, the developing cartridge comprising: A housing for accommodating a developer, the housing having a first side in a first direction and a second side spaced from the first side, the housing having a third side in a second direction and a fourth side spaced 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 than the fourth side in the second direction; A coupling gear having a coupling portion that can receive a driving force external to the developing cartridge and rotate about a coupling gear axis extending in the first direction; Characterized in that it further comprises: A pushed portion that can receive the force of the pushing portion to bring the developing roller closer to the photosensitive drum, the pushed portion being closer to the developing roller than the coupling gear in the second direction; A lifted portion that, in a state where the developing cartridge is mounted to the drum cartridge, can receive the force of the lifting member to drive the developing cartridge to move from a first position to a second position relative to the drum cartridge; The pushed portion has a force receiving surface for receiving the force, and the pushing portion has a force applying surface that cooperates with the force receiving surface; In the first position, the force receiving surface contacts the force applying surface in a width direction intersecting the longitudinal direction; In the second position, the force receiving surface is farther from the photosensitive drum than the force applying surface in the width direction.

2. The developing cartridge according to claim 1, wherein, The lifted portion is closer to the third side of the housing than the fourth side of the housing in the second direction.

3. The developing cartridge according to claim 1, wherein, It further comprises a chip having an electrical contact surface, the electrical contact surface being farther from the coupling gear than the lifted portion in the second direction.

4. The developing cartridge according to claim 3, wherein, It further comprises a bracket for supporting the electrical contact surface, the bracket being fixedly mounted on the first side of the housing.

5. The developing cartridge according to claim 1, wherein, It further comprises a support portion that is closer to the third side of the housing than the coupling gear in the second direction; In the first position, the support portion does not contact the drum cartridge; In the second position, the support portion contacts the drum cartridge.

6. The developing cartridge according to claim 1, wherein, In the second position, the angle between the width direction of the drum cartridge and the second direction of the developing cartridge is α, where 60° ≤ α ≤ 85°.

7. The developing cartridge according to claim 1, wherein, It further comprises a guiding portion and a support portion, and in the second position, the support portion contacts the drum cartridge; The guiding portion is closer to the third side of the housing than the support portion in the second direction; Viewed along the first direction, the guiding portion coincides with at least a part of the developing roller.

8. The developing cartridge according to claim 1, wherein, It further comprises a locking portion that, in a state where the developing cartridge is mounted on the drum cartridge, is used to prevent the developing cartridge from detaching from the drum cartridge; The locking portion is close to the second side of the housing in the first direction and close to the fourth side of the housing in the second direction.

9. The developing cartridge according to claim 8, wherein, Further comprising a support portion, which contacts the drum cartridge at the second position; The locking portion is farther from the support portion than the lifting portion in the second direction.

10. The developing cartridge according to claim 1, wherein, Further comprising a support portion, which contacts the drum cartridge at the second position; With the developing cartridge placed horizontally in the second direction and the developing roller being close to above the housing: In a third direction perpendicular to the second direction, the lifted portion is located below the support portion.

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