Developing box

Abstract

The utility model discloses a developing box which can be detachably mounted on an electrophotographic imaging device, and comprises a shell used for accommodating a developing agent, the shell is provided with a first side and a second side which are separately arranged in a first direction, and the shell is provided with a third side and a fourth side which are separately arranged in a second direction crossed with the first direction; a developing roller; a coupling gear; the chip comprises an electric contact surface, and the electric contact surface is located on the first side of the shell in the first direction; the force receiving part can receive force outside the developing box so as to enable the developing box to move from the first position to the second position; the force receiving part is located on the fourth side of the shell in the second direction; the developing box disclosed by the utility model can effectively avoid the phenomenon that the forced and pushed bulges are abraded and damaged, so that the service life is prolonged, and the contact tightness between the photosensitive drum and the developing roller is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of electronic photographic imaging, in particular to a developing box. Background Art

[0002] A developer cartridge is a consumable component used in electrophotographic imaging devices, such as printers. During use, the developer cartridge can be detachably mounted to the drum cartridge and, together with the drum cartridge, installed within the electrophotographic imaging device. Conventional developer cartridges include a drive gear, a powder feed roller, a developer roller, a stirring frame, and a storage chip. The drum cartridge includes a drum frame and a photosensitive drum. After the developer cartridge is installed, the developer roller in the developer cartridge contacts the drum, allowing the developer inside the cartridge to be transferred to the photosensitive drum, thereby developing the electrostatic latent image on the drum.

[0003] At the same time, the storage chip includes an electrical contact surface that is electrically connected to the internal electrical connection component of the electronic photographic imaging device. After the developer box is installed in the electronic photographic imaging device, the electrical contact surface maintains contact with the electrical connection component, so that the developer box and the electronic photographic imaging device establish a communication connection. Through this connection, the developer box can transmit the model, age and capacity life information of the developer box to the electronic photographic imaging device. In the prior art, the electrical contact surface is maintained in contact with the electrical connection component by a retainer provided on one side of the shell for supporting the electrical contact surface. However, this retainer can move within a limited range and stroke relative to the shell, and the electrical contact surface supported on the retainer will also move with the movement of the developer retainer, which will make the electrical connection between the electrical contact surface and the electronic photographic imaging device unstable and there is a probability of disconnection. Therefore, these situations are obviously not what manufacturers and users want to see. Utility Model Content

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

[0005] A developing cartridge capable of being detachably mounted to an electrophotographic imaging device, the developing cartridge comprising:

[0006] a housing for accommodating a developer, the housing having a first side and a second side separately disposed in a first direction, and a third side and a fourth side separately disposed in a second direction intersecting the first direction;

[0007] a developing roller rotatable about a developing roller axis extending in the first direction, the developing roller being closer to the third side of the housing relative to the fourth side of the housing in the second direction;

[0008] a coupling gear having a coupling portion, the coupling gear being located on the first side of the housing in the first direction, the coupling portion being configured to receive a driving force from outside the developing cartridge and drive the developing roller to rotate;

[0009] a chip comprising an electrical contact surface, the electrical contact surface being located on the first side of the housing in the first direction;

[0010] a force receiving portion configured to receive a force from outside the developing cartridge to move the developing cartridge from the first position to the second position;

[0011] The force receiving portion is located on the fourth side of the housing in the second direction.

[0012] Furthermore, it also includes a forced pushing portion, including a first protrusion as a main body and a second protrusion as an extension portion, and the first protrusion can receive a force for making the developing roller close to the photosensitive drum of the electrophotographic imaging device.

[0013] Furthermore, the first protrusion has a force receiving surface for receiving the force, and the first protrusion is located between the rotation axis of the coupling gear and the electrical contact surface in the second direction;

[0014] The second protrusion extends in the second direction.

[0015] Furthermore, it also includes a chip frame for supporting the chip and the electrical contact surface; the chip frame is fixed to the first side of the housing.

[0016] Furthermore, the first position is configured as a non-electrically connected position between the electrical contact surface and the electrophotographic imaging device, and the second position is configured as an electrically connected position between the electrical contact surface and the electrophotographic imaging device.

[0017] Further, when the developing cartridge is arranged in a state where the electrical contact surface is directed upwards of the developing cartridge in the third direction, the first position of the housing is closer to the bottom of the developing cartridge than the second position;

[0018] The third direction intersects the first direction and the second direction.

[0019] Further, the force receiving portion is configured as a second force receiving surface, and the second force receiving surface extends in the first direction.

[0020] Further, when the developing cartridge is arranged in a state where the electrical contact surface faces upward of the developing cartridge in the third direction, the second force receiving surface faces downward of the developing cartridge in the third direction;

[0021] The third direction intersects the first direction and the second direction.

[0022] Further, when the developing cartridge is arranged in a state where the electrical contact surface faces upward of the developing cartridge in the third direction, the electrical contact surface is located between the force receiving portion and the first protrusion in the third direction;

[0023] The third direction intersects the first direction and the second direction.

[0024] Further, the developing box includes two force receiving portions, and the two force receiving portions are separately arranged on the first side and the second side of the shell in the first direction. Beneficial effects

[0025] The developer box of the utility model is provided with a force receiving portion at the rear side in the front-to-back direction, and can receive external force to move the developer box from the pre-installation position to the installation position to ensure the stability of the developer box and the electronic photographic device.

[0026] The forced pushing portion of the utility model is spaced apart from the electrical contact surface of the storage chip, which ensures the stability of the forced pushing portion while avoiding mutual interference between the forced pushing portion and the electrical contact surface when the developing box is installed on the drum box and the imaging device and when the imaging device is used. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a three-dimensional structural diagram of the drum box in the utility model;

[0028] Figure 2 This is a schematic diagram of the three-dimensional structure of the developing cartridge in Example 1 of the present utility model;

[0029] Figure 3 This is a schematic diagram of the three-dimensional structure of the developing cartridge in Example 1 of the present utility model from another angle;

[0030] Figure 4 This is a schematic structural diagram of the right side of the developing cartridge in Example 1 of the present utility model;

[0031] Figure 5 1 is a schematic side cross-sectional view of the developing cartridge in the vertical direction in Example 1 of the present utility model;

[0032] Figure 6 This is a partially exploded schematic diagram of the left end portion of the developing cartridge in Example 1 of the present utility model;

[0033] Figure 7 This is a partially exploded schematic diagram of another angle of the left end portion of the developing cartridge in Example 1 of the present utility model;

[0034] Figure 8 This is a partially exploded schematic diagram of the left end portion of the developing cartridge in Example 1 of the present utility model at another angle;

[0035] Figure 9 This is a schematic diagram of the three-dimensional structure of the second forced-pushing protrusion in Example 1 of the present utility model;

[0036] Figure 10 This is a schematic diagram of the three-dimensional structure of the developing cartridge in Example 2 of the present utility model;

[0037] Figure 11 This is a partially exploded schematic diagram of the left end portion of the developing cartridge in Example 2 of the present utility model;

[0038] Figure 12 This is a schematic diagram of the left side position of the gear train and chip in Example 2 of the present utility model;

[0039] Figure 13 This is a schematic diagram of the position of the gear train and the chip at another angle in Example 2 of the present invention;

[0040] Figure 14 This is a schematic diagram of the three-dimensional structure of the outer cover in Example 3 of the present utility model;

[0041] Figure 15 This is a schematic diagram of a developing cartridge in Example 3 of the present utility model at a certain angle;

[0042] Figure 16 This is a schematic diagram of the developing cartridge in Example 3 of the present utility model from another angle;

[0043] Figure 17 This is a schematic diagram of the developing cartridge in Example 3 of the present utility model at an angle;

[0044] Figure 18 This is a schematic diagram of the left side position of the developing cartridge in Example 3 of the present utility model when the outer cover is not fully installed on the imaging device;

[0045] Figure 19 This is a schematic diagram of the left side position of the developing cartridge in Example 3 of the present utility model when the outer cover is fully installed on the imaging device;

[0046] Figure 20 This is a schematic diagram of the right side position of the developing cartridge in Example 3 of the present utility model when it is installed in the imaging device without the outer cover fully covered;

[0047] Figure 21 This is a schematic diagram of the right side position of the outer cover of the developing box in the complete state when the developing box is installed to the imaging device in Example 3 of the present invention. DETAILED DESCRIPTION

[0048] In order to make the purpose, technical solution and technical effect of the embodiment of the present invention more clear, the technical solution of the developer cartridge of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiment described is only a preferred embodiment of the present invention, not all embodiments. Based on the embodiment of the present invention, other embodiments obtained by those skilled in the art without creative work shall fall within the scope of protection of the present invention. Example 1

[0049] like Figure 1 As shown, a drum cartridge 50 in the prior art is shown; Figure 2 As shown, a developing box 100 is shown; the developing box 100 can be detachably installed inside the drum box 50, and the two can be installed together as a whole into an electronic photographic imaging device (hereinafter referred to as the "imaging device"). The drum box 50, the developing box 100 and the imaging device can cooperate with each other to complete the imaging operation.

[0050] like Figure 2-6 As shown, in the following description, when referring to the direction of the developing box 100, the axial direction of the developing roller 104 is taken as the first direction (left-right direction), and the coupling gear 111 is located on the left side of the developing roller 104; the arrangement direction of the stirring frame axis and the developing roller axis is roughly taken as the second direction (front-back direction), and the developing roller axis is located at the front end of the stirring frame axis; the third direction (up-down direction) is the direction intersecting the first direction and the second direction.

[0051] 1. Drum box

[0052] like Figure 1The figure shows a drum cartridge 50 that can accommodate a developer cartridge 100 and is installed to an imaging device together with the developer cartridge 100 to perform imaging operations. The drum cartridge 50 includes a drum frame 51 for accommodating the developer cartridge 100, and a photosensitive drum 52 rotatably supported at the front end portion in the front-to-back direction of the drum frame 51; a photosensitive drum gear is connected to the left end of the photosensitive drum 52. After the drum cartridge 50 is installed to the imaging device, the photosensitive drum gear of the drum cartridge 50 engages with the drum drive gear (not shown) of the imaging device to receive the driving force of the imaging device and drive the photosensitive drum 52 to rotate around the photosensitive drum axis extending in the left-right direction; the drum frame 51 includes a locking member 54, and the locking member 54 includes a locking portion and a lifting portion. The locking portion is closer to the upper side of the drum frame 51 relative to the lifting portion, and the locking member 54 can rotate around an axis provided between the locking portion and the lifting portion, wherein the locking portion is used to prevent The developer box 100 is blocked from moving to lock the developer box 100 inside the drum box 50, so as to prevent the developer box 100 from being separated from the drum box 50 due to external force after the developer box 100 is installed in the drum box 50; the lifting portion can push the developer box 100 upward when the developer box 100 and the drum box 50 are detached, so that the developer box 100 is separated from the drum box 50 to release the lock with the drum box 50; the drum box 50 is also provided with a storage unit (not shown) and a drum electrical contact surface (not shown) that connects the storage unit (not shown) to the imaging device. When the drum box 50 is installed in the imaging device, the drum electrical contact surface can be electrically contacted with the electrical contacts of the imaging device, so that the drum box 50 and the imaging device establish a communication link.

[0053] The interior of the drum box 50 also includes a pushing portion 55 for applying a pushing force to the forced pushing protrusion 120 in the developing box 100. When the developing box 100 is installed to the imaging device, the forced pushing protrusion 120 contacts the pushing portion 55, so that the pushing portion 55 applies a pushing force to the forced pushing protrusion 120 to make the developing box 104 contact the photosensitive drum 52.

[0054] 2. Developer box

[0055] like Figure 2-81 , a developing cartridge 100 in Embodiment 1 of the present invention is shown. The developing cartridge 100 can be detachably installed in the drum cartridge 50 and can be installed in an imaging device together with the drum cartridge 50 to complete an imaging operation. The developing cartridge 100 includes a housing 101, which includes a powder bin 101a for accommodating developer and an end cover 101b detachably installed on the left side of the powder bin 101a. The end cover 101b can cover at least part of a gear train in the developing cartridge 100. The gear train includes but is not limited to a coupling gear 111, a stirring frame gear 112, a powder feeding roller gear 113, a developing roller gear 114, and a plurality of connecting gears. The coupling gear 111 is disposed on the left side of the housing 101. The coupling gear 111 has a coupling portion 111a and a gear portion 111b. When the developing cartridge 100 is installed with the drum cartridge 50, the coupling portion 111a can be connected to a driving member (not shown) of the imaging device to receive the driving force of the imaging device and drive the coupling gear 111 to rotate around a driving gear axis extending in the left-right direction. The coupling gear 111 is engaged with the powder feeding roller gear 113 and the developing roller gear 114, so that the coupling gear 111 can drive the powder feeding roller gear 113 and the developing roller gear 114 to rotate. The coupling gear 111 is engaged with the stirring frame gear 112 through the idler gear 115 to transmit driving force to the stirring frame gear 112, thereby driving the coupling gear 111 to rotate. The developing box 100 also includes a developing roller 104, a powder feeding roller 103 and a stirring frame 102 supported on the shell 101. The left ends of the developing roller 104, the powder feeding roller 103 and the stirring frame 102 are respectively connected to the developing roller gear 114, the powder feeding roller gear 113 and the stirring frame gear 112, so that each gear can respectively drive the developing roller 104, the powder feeding roller 103 and the stirring frame 102 to rotate around their respective axes extending in the left and right directions; the developing roller 104 is arranged at the front end of the shell 101 in the front-to-back direction. When the developing box 100 is installed on the drum box 50, the developing roller 104 can contact the photosensitive drum 52. During the operation of the developing box 100, the coupling gear 111 is connected to the driving member of the imaging device to receive the imaging device The driving force drives the stirring frame 102, the powder feeding roller 103 and the developing roller 104 to rotate respectively. The stirring frame 102 stirs the developer inside the shell 101 and feeds the developer to the powder feeding roller 103. The powder feeding roller 103 continues to stir the developer and feeds it to the developing roller 104. The developing roller 104 feeds the developer on it to the photosensitive drum 52 through its contact with the photosensitive drum 52 to develop the electrostatic latent image on the photosensitive drum 52; the developing box 100 also includes an electrode 105, and the electrode 105 has an electrical connection part. The electrical connection part can be connected to the power supply device of the imaging device to receive the power provided by the imaging device and transmit the power to the developing roller 104 and the powder feeding roller 103, thereby ensuring the smooth transportation of the developer.

[0056] The developer cartridge 100 further includes a chip holder 170 and a chip 180 supported by the chip holder 170. The chip holder 170 is located on the left side of the housing 101 in the left-right direction and is closer to the rear side of the housing 101 than the front side in the front-back direction. Preferably, in this embodiment, the chip holder 170 is movable relative to the housing 101. Alternatively, in other embodiments, the chip holder 170 may be fixed to a side of the housing 101 or extend outward from a side of the housing 101. The chip 180 includes a storage portion (not shown) and an electrical contact surface 181. The storage portion stores information such as the model of the developer cartridge 100. The storage portion is electrically connected to the electrical contact surface 181, which can contact an electrical contact point (not shown) of an imaging device and thereby electrically connect to the imaging device, thereby establishing a communication link between the developer cartridge 100 and the imaging device. When the life of the developer cartridge 100 is about to expire, the imaging device can prompt the user to replace the developer cartridge 100 with a new one via an operation panel or indicator light.

[0057] In order to achieve close contact between the developing roller 104 in the developing box 100 and the photosensitive drum 52 in the drum box 50, forced pushing protrusions 120 extending in the left and right directions are also provided on both sides of the shell 101 in the developing box 100; when viewed from the left and right directions, at least a part of the forced pushing protrusions 120 located on the left and right sides of the shell 101 overlap.

[0058] Specifically, a first forced push protrusion 120R extends from the right side of the powder bin 101a in the shell 101 in the left-right direction; a second forced push protrusion 120L extends from the left side of the powder bin 101a in the left-right direction; when viewed from the left-right direction, the first forced push protrusion 120R and the second forced push protrusion 120L at least partially overlap.

[0059] In order to describe the position of the forced pushing protrusion 120 on the developer cartridge 100, the position of the forced pushing protrusion 120 is specifically described below by taking the second forced pushing protrusion 120L provided on the left side of the shell 101 as an example; in the up-down direction, the second forced pushing protrusion 120L is located below the electrical contact surface 181 and the coupling gear 111, and the second forced pushing protrusion 120L is spaced apart from the electrical contact surface 181 and the coupling gear 111 in the up-down direction; in the front-to-back direction, the second forced pushing protrusion 120L is closer to the developing roller 104 than the electrical contact surface 181, and the coupling gear 111, The second forced pushing protrusion 120L and the electrical contact surface 181 are arranged in sequence in the front-to-back direction; the forced pushing protrusion 120L extends in the left-right direction. In order to ensure the contact between the second forced pushing protrusion 120L and the forced pushing portion 55 in the drum box 50, the second forced pushing protrusion 120L at least partially overlaps with the gear portion of the stirring frame gear 112 in the left-right direction. While realizing the miniaturization of the developing box 100, it avoids the situation where the forced pushing protrusion 120 interferes with the electrical connection between the electrical contact surface 181 and the electrical contact head when the developing box 100 is installed on the drum box 50 and the imaging device.

[0060] Optionally, the developing box 100 also includes a detected protrusion and a counting gear for transmitting driving force to the detected protrusion. Specifically, the stirring frame gear 112 includes a large gear portion 112a for engaging with the idler gear 115 and a small gear portion 112b for engaging with the counting gear. In the left and right directions, the second forced pushing protrusion 120L at least partially overlaps with the large gear portion 112a.

[0061] like Figure 9 As shown, further, the second forced-pushing protrusion 120L includes a first protrusion 121 and a second protrusion 122 interconnected with the first protrusion 121, and the first protrusion 121 and the second protrusion 122 both protrude from the left side of the powder bin 101a, and the second forced-pushing protrusion 120L is configured to move the developing box 100 toward the direction of the photosensitive drum 52 of the drum box 50 under the action of external force, so that the developing roller 104 contacts the photosensitive drum 52 of the drum box 50.

[0062] When the developer cartridge 100 is installed to the drum cartridge 50, the external force is applied to the second forced pushing protrusion 120L by the pushing portion 55, so that the developer cartridge 100 can be moved in the direction close to the drum cartridge 50 to ensure the stability of the contact between the developing roller 104 and the photosensitive drum 52 of the drum cartridge 50, thereby improving the effect of electrostatic latent image transfer. Since the second forced pushing protrusion 120L includes a first protrusion 121 and a second protrusion 122 interconnected with the first protrusion 121, the first protrusion 121 extends in the left and right directions and in the up and down directions roughly perpendicular to the moving direction of the developer cartridge 100, and the second protrusion 122 extends in the left and right directions and in the front and back directions roughly parallel to the moving direction of the developer cartridge 100; the second protrusion 122 can effectively enhance the mechanical strength of the first protrusion 121, so that when an external force is applied to the first protrusion 121, the second forced pushing protrusion 120 can be effectively avoided from being worn and damaged, thereby improving the service life and ensuring the tightness of the contact between the photosensitive drum 52 and the developer roller 104. Example 2

[0063] Next, we will combine the Figure 10-13 The second embodiment of the present invention will now be described in detail. This embodiment provides a developer cartridge. The similarities between this embodiment and the developer cartridge of the first embodiment will not be repeated in this embodiment. The difference lies in that a forced push portion 420 extends outwardly from both sides of the housing 401 in the left-right direction. The forced push portion 420 is configured to cause the developer cartridge to move toward the drum assembly under the action of an external force, thereby bringing the developer roller 21 into contact with the photosensitive drum of the drum assembly. Specifically, the forced push portion 420 extends outwardly from both sides of the powder hopper 401a in the left-right direction. On the right side of the powder hopper 401a, the forced push portion 420 includes a first protrusion 421 and a second protrusion 422 interconnected with the first protrusion 421. The first protrusion 421 is used to generate the forced push force of the forced push portion 55 in the drum cartridge 50 to push the developer cartridge 100 toward the photosensitive drum 52. The second protrusion 422 extends in the front-to-back direction to effectively enhance the mechanical strength of the first protrusion 421.

[0064] On the other hand, printers are constantly pursuing miniaturization, making it difficult to accommodate larger gear trains. Therefore, this embodiment provides a developer cartridge 400 that includes a chip 480 connected to the left side of an end cap 401 via a chip holder 480. Chip 480 includes a storage portion (not shown) and an electrical contact surface 481. The storage portion stores information about the model, age, and maximum print volume of the developer cartridge 400. Electrical contact surface 481 can establish a communication link with an imaging device, allowing the imaging device to identify the developer cartridge 400. Compared with existing technologies, this helps reduce the size of the gear train and the space occupied by the gear train, facilitating the trend toward miniaturization of printers.

[0065] The gear train includes a drive gear 411, a developing roller gear 414, and a powder feed roller gear 413. The drive gear 411 is rotatably connected to the left side of the powder hopper 401a. The developing roller gear 414 is sleeved on the outer surface of the developing roller 404, and the powder feed roller gear 413 is sleeved on the outer surface of the powder feed roller 403. The developing roller gear 414 and the powder feed roller gear 413 are respectively meshed with the drive gear 411. The gear train also includes a connecting gear 415 and an agitator gear 412. The connecting gear 415 is rotatably connected to the left side of the powder hopper 401a. The connecting gear 415 includes a first gear portion 415a and a second gear portion 415b, which are axially connected in sequence. The second gear portion 415b meshes with the drive gear 411. The connecting gear 415 is a double gear, with the first gear portion 415a closer to the powder hopper 401a and the second gear portion 415b farther away from the powder hopper 401a. The diameter of the second gear portion 415b is larger than that of the first gear portion 415a. The stirring frame gear 412 includes a third gear portion 412a and a fourth gear portion 412b. The stirring frame gear 412 is sleeved on the outer surface of the end portion of the stirring frame 402. The third gear portion 412a and the first gear portion 415a are engaged with each other. The outer diameter of the third gear portion 412a is larger than the outer diameter of the fourth gear portion 412b. The third gear portion 412a faces the powder bin 401a, and the fourth gear portion 412b faces away from the powder bin 401a.

[0066] In one implementation of the present embodiment, in the left-right direction, the first protrusion 421, the third gear portion 412a and the electrical contact surface 481 are arranged in sequence, and the distance between the free end of the first protrusion 421 away from the powder bin 401a and the left end face of the main body 401 is less than or equal to the distance between the end face of the third gear portion 412a facing the powder bin 401a and the left end face of the main body 401; so as to avoid interference between the components when the developing box 400 is in use.

[0067] In another embodiment of this embodiment, the projection of the second protrusion 422 on the powder bin 401a extends in the front-to-back direction; the chip 480 and its electrical contact surface 481, the drive gear 411, the developer roller gear 414, the powder feed roller gear 413, the connecting gear 415, and the third gear portion 412a are all located on the same side of the second protrusion 422. When viewed in a left-right cross-section, the entire forced push portion 420 is located outside the addendum circle of the drive gear 411, the addendum circle of the developer roller gear 414, and the addendum circle of the connecting gear 415; and when viewed in a left-to-right direction, the electrical contact surface 481 is located outside the addendum circle of the drive gear 411, the addendum circle of the developer roller gear 414, the tooth circle of the connecting gear 415, and the projection of the forced push portion 420.

[0068] In another embodiment of this embodiment, on the right side of the shell 401, the second protrusion 422 extends to the locked protrusion 406, so that the first protrusion 421, the second protrusion 422 and the locking protrusion 406 are formed as one piece to enhance the mechanical strength of the first protrusion 421 and the locking protrusion 406. Example 3

[0069] like Figure 14-21 As shown, a developing cartridge 800 in Example 3 is shown. The same parts as those in the developing cartridge in the above embodiment will not be described here. The difference from the above embodiment is that the interior of the imaging device includes a mounting cavity for mounting the developing cartridge 800 and the drum cartridge 1, as shown in FIG. Figure 14 As described above, an outer cover 11 is provided at the exit of the mounting cavity, and an electrical contact 12 is provided inside the mounting cavity, which can be connected to the electrical contact surface 832a. An abutment portion is provided on one side of the developer cartridge 800 in the left-right direction. After the developer cartridge 100 is installed in the imaging device, the abutment portion can abut against the outer cover 11 of the imaging device and receive the thrust of the outer cover 11 to drive the developer cartridge 800 to move inside the imaging device, so that the electrical contact surface 832a of the developer cartridge 800 contacts the electrical contact 12, thereby establishing a communication connection between the developer cartridge 800 and the imaging device.

[0070] Specifically, a reinforcing plate 11a is provided inside the outer cover 11 of the imaging device, and the reinforcing plate 11a includes a supporting surface 11b facing forward and upward; the abutting portion is constructed as an abutting surface 851 provided at the rear end of the protective cover 801b on the left side of the developing box 800, and the abutting surface 851 extends in the left and right directions, and the abutting surface 851 is cut obliquely toward the rear and downward; in the left and right directions, the reinforcing plate 11a and the abutting surface 851 at least partially overlap.

[0071] During the process of installing the developing cartridge 800 to the imaging device, the developing cartridge 800 moves from the back to the front toward the interior of the imaging device and enters the interior of the mounting cavity of the imaging device. Figure 18 As shown, the electrical contact surface 832a of the developing chip 832 of the developing cartridge 800 is spaced apart and located below the electrical contact 12. Afterwards, the user rotates the outer cover 11 upward and fixes the outer cover 11 at the outlet of the accommodating chamber by a locking member (not shown) provided between the main body of the imaging device and the outer cover 11; Figure 19 As shown, during the upward rotation of the outer cover 11 , the reinforcing plate 11 a of the outer cover 11 comes into contact with the abutting surface 851 and applies a thrust to the abutting surface 851 ;

[0072] After the abutment surface 851 is subjected to the thrust, under the action of the thrust, the abutment surface 851 drives the developing box 800 to rotate upward around the axis of the developing roller 804, and the electrical contact surface 832a rotates upward around the axis of the developing roller together with the developing box 800, and contacts the electrical contact 12 to establish an electrical connection between the electrical contact surface 832a and the electrical contact 12, thereby establishing a communication link between the developing box 800 and the imaging device to realize the communication connection between the developing box 800 and the imaging device; further, when the outer cover 11 is locked at the opening of the accommodating cavity, the support surface 11b of the outer cover 11 abuts against the abutment surface 851, and the support surface 11b applies an upward reaction force to the abutment surface 851, thereby maintaining stable contact between the electrical contact surface 832a and the electrical contact 12, thereby ensuring a stable communication connection between the developing box and the imaging device.

[0073] Optionally, in other embodiments of the present embodiment, the abutment portion is constructed as an abutment plate 852 extending outward from the right side of the shell 801, and the abutment plate 852 includes a second abutment surface 852a facing rearward and downward, and a reinforcing rib 852b arranged at the front upper part of the abutment plate 852. Similar to the above embodiment, after the developing box 800 is installed to the imaging device, the outer cover 11 rotates upward, so that the supporting surface 11b of the reinforcing plate 11a abuts against the second abutment surface 852a and applies a thrust to the second abutment surface 852a. After the abutment surface 851 is subjected to the thrust, under the action of the thrust, the abutment surface 851 drives the developing box 800 to rotate upward around the axis of the developing roller 804, and the electrical contact surface 832a rotates upward around the axis of the developing roller together with the developing box 800, thereby establishing a communication link between the developing box 800 and the imaging device to realize the communication connection between the developing box 800 and the imaging device.

[0074] Preferably, in another embodiment of the present embodiment, abutment surfaces 851 and abutment plates 852 are respectively provided on the left and right sides of the developing box 800; correspondingly, the outer cover 11 includes two reinforcing plates 11a respectively adapted to the abutment surfaces 851 and abutment plates 852 of the developing box 800. During the upward rotation of the outer cover 11, the two reinforcing plates 11a respectively contact the abutment surfaces 851 and the abutment plates 852, thereby further improving the stability of the contact between the electrical contact surface 832a and the electrical contact 12.

[0075] It is worth mentioning that in order to make the electrical contact surface 832a of the developing chip 832 have higher positioning accuracy, that is, to ensure that the electrical contact surface 832a can easily contact the electrical contact 12 after the developing box 800 is installed in the imaging device, a guide groove 12a is also provided inside the imaging device, and the guide groove 12a has an opening facing downward, and the electrical contact 12 is provided inside the guide groove 12a; when the user installs the developing box 500 into the interior of the imaging device, the electrical contact surface 832a is located below the guide groove 12a in the up and down directions, and then the user pushes the outer cover 11 to move upward to close the imaging device, and the outer cover 11 abuts against the force-bearing end of the abutting surface 851 and applies a forward force to the force-bearing end. After the abutting surface 851 is subjected to force, it drives the developing box 800 to move upward, so that the electrical contact surface 832a enters the interior of the guide groove 12a and contacts the electrical contact 12, thereby realizing an accurate and stable connection between the electrical contact surface 832a and the electrical contact 12.

[0076] The developing box of the utility model can effectively reduce the phenomenon of wear and damage of the forced pushing protrusion, increase the service life, and ensure the tightness of the contact between the photosensitive drum and the developing roller.

[0077] The forced pushing portion of the utility model is spaced apart from the electrical contact surface of the storage chip, thereby avoiding interference between the forced pushing portion and the electrical contact surface when the developing box is installed on the drum box and the imaging device and when the imaging device is used.

[0078] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments can still be modified, or some of the technical features thereof can be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A developing cartridge capable of being detachably mounted to an electrophotographic imaging device, the developing cartridge comprising: a housing for accommodating a developer, the housing having a first side and a second side separately disposed in a first direction, and a third side and a fourth side separately disposed in a second direction intersecting the first direction; a developing roller rotatable about a developing roller axis extending in the first direction, the developing roller being closer to the third side of the housing relative to the fourth side of the housing in the second direction; a coupling gear having a coupling portion, the coupling gear being located on the first side of the housing in the first direction, the coupling portion being configured to receive a driving force from outside the developing cartridge and drive the developing roller to rotate; a chip comprising an electrical contact surface, the electrical contact surface being located on the first side of the housing in the first direction; It is characterized by further comprising: a force receiving portion configured to receive a force from outside the developing cartridge to move the developing cartridge from the first position to the second position; The force receiving portion is located on the fourth side of the housing in the second direction.

2. The developing cartridge according to claim 1, wherein The invention further includes a forced urging portion including a first protrusion as a main body and a second protrusion as an extension portion, wherein the first protrusion can receive a force for causing the developing roller to approach the photosensitive drum of the electrophotographic imaging device.

3. The developing cartridge according to claim 2, wherein: The first protrusion has a force receiving surface for receiving the force, the first protrusion being located between the rotation axis of the coupling gear and the electrical contact surface in the second direction; The second protrusion extends in the second direction.

4. The developing cartridge according to claim 1, wherein: A chip frame is also included for supporting the chip and the electrical contact surface; the chip frame is fixed to the first side of the housing.

5. The developing cartridge according to claim 1, wherein The first position is configured as a non-electrically connected position between the electrical contact surface and the electrophotographic imaging device, and the second position is configured as an electrically connected position between the electrical contact surface and the electrophotographic imaging device.

6. The developing cartridge according to claim 1, wherein: When the developing cartridge is arranged in a state where the electrical contact surface faces upward of the developing cartridge in a third direction, the first position of the housing is closer to a lower side of the developing cartridge than the second position; The third direction intersects the first direction and the second direction.

7. The developing cartridge according to claim 1, wherein: The force receiving portion is configured as a second force receiving surface extending in the first direction.

8. The developing cartridge according to claim 7, wherein: When the developing cartridge is arranged in a state in which the electrical contact surface is directed upward of the developing cartridge in the third direction, the second force receiving surface is directed downward of the developing cartridge in the third direction; The third direction intersects the first direction and the second direction.

9. The developing cartridge according to claim 2, wherein: When the developing cartridge is arranged in a state where the electrical contact surface faces upward in the third direction, the electrical contact surface is located between the force receiving portion and the first protrusion in the third direction; The third direction intersects the first direction and the second direction.

10. The developing cartridge according to claim 1, wherein The developing cartridge includes two force receiving portions, and the two force receiving portions are disposed on the first side and the second side of the housing to be separated in the first direction.

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