Developing box

Abstract

The present invention discloses a developing cartridge which can be detachably mounted to a drum cartridge, the developing cartridge comprising: a housing for accommodating a developer, the housing having a first side and a second side separately arranged in a first direction; a developing roller; an input gear for receiving a driving force outside the developing cartridge, the input gear being rotatable about an input gear axis extending in a first direction, the input gear being located on a first side of the housing in the first direction; the chip is provided with an electric contact surface, and the electric contact surface is located on the first side of the shell; an electrode; the electrode comprises a power connection part, and the power connection part can be in contact with a power supply component outside the developing box; in the first direction, the power connection part is closer to the first side of the shell relative to the second side of the shell; compared with the prior art, the developing box has the advantages that the impact of vibration generated when the developing box works on the electrophotographic imaging device is avoided, and the service life of the electrophotographic imaging device can be effectively prolonged.

Description

Technical Field

[0001] The present invention relates to the field of electrophotographic imaging technology, and particularly to a developing cartridge. Background Art

[0002] There is disclosed in the prior art a developing cartridge that can be installed together with a drum cartridge into an electrophotographic imaging apparatus. The developing cartridge includes a developing roller, a powder feeding roller, and an electrode. The electrode can receive power from the electrophotographic imaging apparatus and transfer the power to the developing roller and the powder feeding roller to improve the imaging quality of the developing cartridge. The drum cartridge includes a photosensitive drum for forming an electrostatic latent image and a charger for supplying power to the photosensitive drum.

[0003] In the prior art, in order to meet the power requirements of the developing cartridge and the drum cartridge, the electrophotographic imaging apparatus is provided with a developing power supply member and a drum power supply member that respectively supply power to the developing cartridge and the drum cartridge. When the developing cartridge is supported by the drum cartridge and installed inside the electrophotographic imaging apparatus, and during the imaging operation of the electrophotographic imaging apparatus, multiple components such as the developing roller and the powder feeding roller of the developing cartridge are in motion. After long-term use, the developing power supply member inside the electrophotographic imaging apparatus and the electrode on the developing cartridge are likely to be damaged due to movement impacts, which will reduce the imaging quality of the developing cartridge and the service life of the developing cartridge and the electrophotographic imaging apparatus. Summary of the Invention

[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 that can be detachably installed to a drum cartridge, the developing cartridge comprising:

[0006] A housing for containing a developer, the housing having a first side and a second side that are separated in a first direction, and a third side and a fourth side that are separated in a second direction that intersects the first direction;

[0007] A developing roller rotatable about a developing roller axis extending in the first direction and located on the third side of the housing in the second direction;

[0008] An input gear for receiving a driving force from outside the developing cartridge, the input gear rotatable about an input gear axis extending in the first direction and located on the first side of the housing in the first direction;

[0009] A chip having an electrical contact surface located on the first side of the housing;

[0010] An electrode electrically connected to components of the developing cartridge;

[0011] The electrode includes a power connection portion that can contact a power supply member outside the developing cartridge;

[0012] In the first direction, the power connection portion is closer to the first side of the housing than the second side of the housing.

[0013] Furthermore, the electrode further includes a power supply portion and a grounding portion;

[0014] The power supply portion can contact and be electrically connected to a component of the developing cartridge, and the grounding portion is used to contact a grounding member outside the developing cartridge and / or the negative electrode of the power supply;

[0015] The power supply portion and the grounding portion can be electrically connected to the power connection portion.

[0016] Furthermore, in the first direction, the power supply portion is closer to the first side of the housing than the second side of the housing.

[0017] Furthermore, in the first direction, the grounding portion is closer to the first side of the housing than the second side of the housing;

[0018] In a third direction that intersects the first direction and the second direction, the grounding portion is farther from the rotation axis of the developing roller than the rotation axis of the input gear.

[0019] Furthermore, the chip has a grounding contact, and the grounding portion can be electrically connected to the grounding contact.

[0020] Furthermore, in the second direction, the power connection portion is farther from the rotation axis of the input gear than the rotation axis of the developing roller.

[0021] Furthermore, it further includes a detected protrusion that can move relative to the housing;

[0022] In the first direction, the detected protrusion is closer to the second side of the housing than the first side of the housing.

[0023] Furthermore, it further includes a light-emitting member;

[0024] In the first direction, the light-emitting member is closer to the second side of the housing than the first side of the housing.

[0025] Furthermore, in a state where the developing cartridge is installed in the drum cartridge, the power connection portion can contact a charger inside the drum cartridge.

[0026] Further, in the second direction, at least a part of the power connection portion is farther from the fourth side of the housing than the developing roller.

[0027] Further, in the first direction, the maximum distance between the end of the input gear and the power connection portion is L, where 31 mm < L < 41 mm.

[0028] Further, the power connection portion extends in the first direction, and the length of the power connection portion in the first direction is S, where 2 mm ≤ S ≤ 10 mm.

[0029] Further, the power connection portion is movable relative to the housing between a first position and a second position.

[0030] The present invention also provides a developing cartridge, which includes:

[0031] A housing for containing a developer, the housing having a first side and a second side that are separated in a first direction, and a third side and a fourth side that are separated in a second direction that intersects the first direction;

[0032] A developing roller that can rotate about a developing roller axis extending in the first direction, and in the second direction, the developing roller is located on the third side of the housing;

[0033] An input gear for receiving a driving force from outside the developing cartridge, the input gear can rotate about an input gear axis extending in the first direction, and in the first direction, the input gear is located on the first side of the housing;

[0034] A chip having an electrical contact surface, the electrical contact surface being located on the first side of the housing;

[0035] An electrode, the electrode being electrically connected to a component of the developing cartridge;

[0036] The electrode includes a power connection portion, and the power connection portion can contact a power supply member outside the developing cartridge;

[0037] The power connection portion is movable relative to the housing between a first position and a second position;

[0038] In the second direction, the first position is closer to the fourth side of the housing than the second position.

[0039] Further, an elastic member is further included for keeping the power connection portion in the first position.

[0040] Further, in the second direction, the first position of the power connection portion is closer to the electrical contact surface than the second position of the power connection portion.

[0041] Further, it further includes a force receiving portion for receiving a force outside the developing cartridge to drive the electrode to move from the first position to the second position.

[0042] The present invention further provides a developing cartridge, which includes:

[0043] A housing for accommodating a developer, the housing having a first side and a second side separated in a first direction, and the housing having a third side and a fourth side separated in a second direction intersecting the first direction;

[0044] A developing roller rotatable about a developing roller axis extending in the first direction, and the developing roller is located on the third side of the housing in the second direction;

[0045] An input gear for receiving a driving force outside the developing cartridge, the input gear rotatable about an input gear axis extending in the first direction, and the input gear is located on the first side of the housing in the first direction;

[0046] A chip having an electrical contact surface, and the electrical contact surface is located on the first side of the housing;

[0047] An electrode for receiving electric power outside the developing cartridge and delivering it to components of the developing cartridge;

[0048] The electrode includes a power connection portion, a grounding portion, and a voltage regulating unit. The power connection portion can be in contact with a power supply member outside the developing cartridge, and the grounding portion is used to be in contact with a grounding member outside the developing cartridge and / or the negative pole of the power supply;

[0049] In the first direction, the power connection portion is closer to the first side of the housing than the second side of the housing;

[0050] The power connection portion can be electrically connected to the grounding portion and the voltage regulating unit;

[0051] In a state where the grounding portion is electrically connected to a grounding member outside the developing cartridge and / or the negative pole of the power supply, the voltage regulating unit is used to adjust a first voltage applied to the developing cartridge to a second voltage different from the first voltage.

[0052] Further, the first voltage is greater than the second voltage.

[0053] Further, it further includes a power supply part, which is used to contact and electrically connect with the components of the developing cartridge;

[0054] A first impedance unit, electrically connected between the power connection part and the power supply part;

[0055] A second impedance unit, electrically connected between the power supply part and the grounding part.

[0056] Further, the resistance value of the first impedance unit is R1, and the resistance value of the second impedance unit is R2; wherein, 5 MΩ ≤ R1 = R2 ≤ 10 MΩ.

[0057] Beneficial effects:

[0058] In the developing cartridge of the present invention, through the re - design of the power supply device, the developing cartridge can receive the power on the drum cartridge and transfer it to the developing roller, powder feeding roller and powder discharging blade, thereby ensuring the imaging quality of the developing cartridge; at the same time, the direct contact between the developing cartridge and the electro - photographic imaging device is reduced, avoiding the mutual collision caused by the vibration generated during the operation of the developing cartridge to the developing cartridge and the electro - photographic imaging device, effectively improving the service life of the developing cartridge and the electro - photographic imaging device; in addition, the power supply device for supplying power to the developing cartridge on the electro - photographic imaging device can be cancelled, reducing the production cost of the electro - photographic imaging device. Description of the drawings

[0059] Figure 1 is a drum cartridge in the prior art;

[0060] [[ID=,24]] Figure 2 is an exploded structure schematic diagram of the drum frame in the prior - art drum cartridge;

[0061] Figure 3 is a three - dimensional structure schematic diagram of the developing cartridge in Embodiment 1 of the present invention;

[0062] Figure 4 is a three - dimensional structure schematic diagram of the developing cartridge from another angle in Embodiment 1 of the present invention;

[0063] Figure 5 is a partial exploded structure schematic diagram of the left end part of the developing cartridge in Embodiment 1 of the present invention;

[0064] Figure 6 is a three - dimensional structure schematic diagram of the power supply assembly in Embodiment 1 of the present invention;

[0065] Figure 7 is the circuit diagram of the power supply assembly in Embodiment 1 of the invention;

[0066] Figure 8 is a three - dimensional structure schematic diagram of the connecting member in Embodiment 1 of the present invention;

[0067] Figure 9 It is a schematic three-dimensional structure diagram of the power supply component in Embodiment 2 of the present invention;

[0068] Figure 10 It is a circuit diagram of the power supply component in Embodiment 2 of the invention;

[0069] Figure 11 It is a schematic exploded view of the drum frame in the drum cartridge of the prior art;

[0070] Figure 12 It is a schematic three-dimensional structure diagram of the developing cartridge in Embodiment 3 of the present invention;

[0071] Figure 13 It is a schematic three-dimensional structure diagram of the developing cartridge from another angle in Embodiment 3 of the present invention;

[0072] Figure 14 It is a top view of the developing cartridge in the up-down direction in Embodiment 3 of the present invention;

[0073] Figure 15 It is a left view of the developing cartridge in the left-right direction in Embodiment 3 of the present invention;

[0074] Figure 16 It is a schematic exploded view of the left end portion of the developing cartridge in Embodiment 3 of the present invention;

[0075] Figure 17 It is the present invention Figure 14 A cross-sectional view of the developing cartridge at A-A;

[0076] Figure 18 It is a schematic three-dimensional structure diagram of the circuit board in Embodiment 3 of the present invention;

[0077] Figure 19 It is a schematic three-dimensional structure diagram of the circuit board, the connecting arm, and multiple connecting members in Embodiment 3 of the present invention;

[0078] Figure 20 It is a top view of the circuit board, the connecting arm, and multiple connecting members in the up-down direction in Embodiment 3 of the present invention;

[0079] Figure 21 It is a cross-sectional view of the protective cover in the vertical direction in Embodiment 3 of the present invention;

[0080] Figure 22 It is a top view of the protective cover in the up-down direction in Embodiment 3 of the present invention;

[0081] Figure 23 It is a schematic three-dimensional structure diagram of the connecting arm in Embodiment 3 of the present invention;

[0082] Figure 24 It is the present invention Figure 14 A cross-sectional view of the power connection component at B-B;

[0083] Figure 25 is a cross-sectional view of the drum cartridge in the left-right direction of the developing cartridge in a state where the developing cartridge is mounted to the drum cartridge in Example 3 of the present invention;

[0084] Figure 26 This invention Figure 25 Enlarged view of point C in the middle;

[0085] Figure 27 1 is a top view of the left end portion of the developing cartridge in the vertical direction in Example 3 of the present invention;

[0086] Figure 28 2 is a schematic diagram of the three-dimensional structure of the developing cartridge in Example 4 of the present invention;

[0087] Figure 29 is a schematic diagram of the three-dimensional structure of the developing cartridge in embodiment 4 of the present invention from another angle;

[0088] Figure 30 1 is a top view of the developing cartridge in the upper and lower directions in Example 4 of the present invention;

[0089] Figure 31 1 is a left side view of the developing cartridge in the left-right direction in the state where the protective cover is hidden in Example 4 of the present invention;

[0090] Figure 32 is a partially exploded schematic diagram of the left end portion of the developing cartridge in Example 4 of the present invention;

[0091] Figure 33 is a schematic diagram of the three-dimensional structure of the memory chip in Example 4 of the present invention;

[0092] Figure 34 is a bottom view of the memory chip in the upper and lower directions in Example 4 of the present invention;

[0093] Figure 35 This is a schematic structural diagram of a circuit board at a certain angle in Example 4 of the present invention;

[0094] Figure 36 This is a left side view of the connecting arm and the driving assembly in the left-right direction, with the connecting arm in the first position in Example 4 of the present invention;

[0095] Figure 37 This is a left side view of the connecting arm and the driving assembly in the left-right direction, with the connecting arm in the second position in Example 4 of the present invention;

[0096] Figure 38 1 is a schematic diagram of a light emitting member in a developing cartridge decomposed from the developing cartridge in Example 4 of the present invention;

[0097] Figure 39 2 is a schematic diagram of the three-dimensional structure of the developing cartridge in Example 5 of the present invention;

[0098] Figure 40 It is a schematic diagram of the disassembly of the cover and the chip bracket from the developing cartridge in Embodiment 5 of the present invention;

[0099] Figure 41 It is a three-dimensional structure schematic diagram of the storage chip in Embodiment 5 of the present invention;

[0100] Figure 42 It is a left view of the developing cartridge in the left-right direction when the connecting arm is in the second position state in Embodiment 5 of the present invention;

[0101] Figure 43 It is a top view of the developing cartridge in the up-down direction when the connecting arm is in the second position state in Embodiment 5 of the present invention;

[0102] Figure 44 It is a three-dimensional structure schematic diagram of the developing cartridge in Embodiment 6 of the present invention;

[0103] Figure 45 It is a left view of the developing cartridge in the left-right direction when the connecting arm is in the second position state in Embodiment 6 of the present invention;

[0104] Figure 46 It is a three-dimensional structure schematic diagram of the developing cartridge in Embodiment 7 of the present invention;

[0105] Figure 47 It is a left view of the developing cartridge in the left-right direction in Embodiment 7 of the present invention;

[0106] Figure 48 It is a right view of the developing cartridge in the left-right direction in Embodiment 7 of the present invention;

[0107] Figure 49 It is a bottom view of the developing cartridge in the up-down direction in Embodiment 7 of the present invention;

[0108] Figure 50 It is a top view of the developing cartridge in the up-down direction in Embodiment 7 of the present invention;

[0109] Figure 51 It is a left view of the developing cartridge in the left-right direction when the cover is in the hidden state in Embodiment 7 of the present invention;

[0110] Figure 52 It is a schematic diagram of the disassembly of the cover and the gear train from the developing cartridge in Embodiment 7 of the present invention;

[0111] Figure 53 It is a schematic diagram of the disassembly of the cover and the power connection component from the developing cartridge in Embodiment 7 of the present invention;

[0112] Figure 54 It is a left view of the developing cartridge in the left-right direction when the developing cartridge is installed in the drum cartridge state in Embodiment 7 of the present invention. Detailed Implementation Modes

[0113] To make the objectives, technical solutions, and technical effects of the embodiments of the present invention clearer, the technical solutions of the developing cartridge of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only preferred embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, other embodiments obtained by those skilled in the art without creative efforts belong to the protection scope of the present invention.

[0114] Embodiment 1

[0115] As Figure 1 shown, a drum cartridge 50 in the prior art is shown. As Figures 3 - 8 shown, a developing cartridge 100 in Embodiment 1 of the present invention is shown. The developing cartridge 100 is detachably installed in the drum cartridge 50, and the two can be installed as a whole into an electrophotographic imaging device (hereinafter referred to as "imaging device"). With the cooperation of the two and the imaging device, a printing task can be completed. Next, the drum cartridge 50 in the prior art and the developing cartridge 100 in the present invention will be described in detail with reference to specific drawings.

[0116] Drum Cartridge

[0117] As Figures 1 - 2 shown, a drum cartridge 50 in the prior art is shown. The drum cartridge 50 includes a drum frame body 51. The drum frame body 51 has a developing cartridge accommodating portion for accommodating the developing cartridge 100 and configured as a cavity. A photosensitive drum 52 is arranged on the front side of the developing cartridge accommodating portion. A photosensitive drum gear 53 is connected to the left end of the photosensitive drum 52. The photosensitive drum gear 53 can be engaged with a gear (not shown in the drawings) in the imaging device to receive a driving force and rotate, and then can drive the photosensitive drum 52 to rotate around a photosensitive drum axis extending in the left-right direction. The front-back direction intersects with the left-right direction. The drum cartridge 50 further includes urging components 55 respectively arranged on the left and right sides of the developing cartridge accommodating portion. The urging components 55 are elastic urging components and can generate elastic urging forces when subjected to external forces. A locking member 54 is further arranged at the rear side of the urging component 55 on the left side of the drum cartridge 50. The locking member 54 is not limited to being arranged at the position behind the urging component 55 on the left side of the drum cartridge 50. The locking member 54 can lock the developing cartridge 100 by blocking the movement of the developing cartridge 100, so as to stably hold the developing cartridge 100 in the drum cartridge 50 and prevent the developing cartridge 100 from accidentally falling out of the drum cartridge 50. Guide portions 56 are further arranged on both sides of the developing cartridge accommodating portion in the left-right direction. The guide portions 56 are used to guide the developing cartridge 100 to move to the correct position in the developing cartridge accommodating portion. In the front-back direction, the guide portions 56 are located between the photosensitive drum 52 and the urging component assembly 55. When observing along the left-right direction, the urging components 55, the guide portions 56, and the photosensitive drum 52 are arranged in a trend from back to front as a whole in the front-back direction.

[0118] The drum cartridge 50 further includes a charger 57 disposed above the photosensitive drum 52 in the vertical direction. The charger 57 is a member that charges the photosensitive drum 52. In this embodiment, the charger 57 is configured as a grid-controlled corona charger separated from the photosensitive drum 52. The drum frame 51 is provided with an opening 58 for exposing at least a part of the charger 57 to the outside of the developing cartridge 100; the opening 58 is located above the charger 57 in the vertical direction.

[0119] Developing cartridge

[0120] As Figures 3 - 5 shown, a developing cartridge 100 in Embodiment 1 of the present invention is shown. The developing cartridge 100 is detachably installed in the above-mentioned drum cartridge 50. The developing cartridge 100 includes a housing 101. The housing 101 includes a powder chamber 101a that can accommodate a developer. The developing cartridge 100 further includes a cover 101b detachably installed on the left side of the powder chamber 101a. The cover 101b can cover the gear train of the developing cartridge 100. The gear train of the developing cartridge 100 includes, but is not limited to, a drive gear 111, a developing roller gear 112, a stirring frame gear 114, a powder feeding roller gear 113, and a transmission gear 116. The drive gear 111 is disposed at the left end of the housing 101 and can rotate about an axis A2 ( Figure 15 ) extending in the left-right direction. The drive gear 111 includes a coupling portion 111a that can be coupled to the imaging device and receive a driving force from the imaging device, and gear teeth 111b integrally provided with the coupling portion 111a and meshing with the developing roller gear 112 and the powder feeding roller gear 113. The gear teeth 111b can drive the developing roller gear 112 and the powder feeding roller gear 113 to rotate. The stirring frame gear 114 can receive the driving force of the drive gear 111 through an idler gear 115 and rotate. The developing cartridge 100 further includes a stirring frame 102, a powder feeding roller 103, and a developing roller 104 supported on the housing 101. The left ends thereof are respectively connected to the stirring frame gear 114, the powder feeding roller gear 113, and the developing roller gear 112. The stirring frame gear 114 drives the stirring frame 102 to rotate about a stirring frame axis extending in the left-right direction. The powder feeding roller gear 113 drives the powder feeding roller 103 to rotate about a powder feeding roller axis extending in the left-right direction. The developing roller gear 112 drives the developing roller 104 to rotate about an axis A1 ( Figure 15)Rotation. The developing roller 104 is disposed at the front end of the housing 101 in the front-rear direction. When the developing cartridge 100 is installed in the drum cartridge 50, the developing roller 104 of the developing cartridge 100 remains in contact with the photosensitive drum 52 of the drum cartridge 50. During the specific working process of the developing cartridge 100, the rotating stirring frame 102 can stir the developer located in the powder bin 101a and convey the developer to the powder feeding roller 103. The powder feeding roller 103 conveys the developer to the developing roller 104 while rotating. Further, the developing roller 104 can convey the developer carried thereon to the photosensitive drum 52 through contact with the photosensitive drum 52 to develop the electrostatic latent image on the photosensitive drum 52. The developing cartridge 100 includes a powder outlet blade 107 located between the powder feeding roller 103 and the developing roller 104 in the front-rear direction. The powder outlet blade 107 is used to control the thickness of the developer attached to the developing roller 104.

[0121] The transmission gear 116 meshes with the stirring frame gear 114 and can rotate following the stirring frame gear 114. In this embodiment, the transmission gear 116 is configured as a semi-tooth gear. The developing cartridge 100 further includes a detected protrusion 117 disposed above the right side of the housing 101. The detected protrusion 117 can move relative to the housing 101 according to the rotation of the transmission gear 116. In this embodiment, the detected protrusion 117 receives the driving force of the transmission gear 116 through a transmission rod 118 that spans across the left and right sides of the developing cartridge 100 in the left-right direction. The detected protrusion 117 can toggle a detection body (not shown) inside the imaging device to transmit information about the capacity size and newness / oldness of the developing cartridge 100 to the imaging device. After the developing cartridge 100 is installed in the imaging device, the detected protrusion 117 can toggle the detection body inside the imaging device to transmit information about the capacity and newness / oldness of the developing cartridge 100 to the imaging device. The imaging device simultaneously records the information of the developing cartridge 100. When the developer in the developing cartridge 100 is about to be exhausted, the imaging device can prompt the user to replace the new developing cartridge 100 through means such as an operation panel or an indicator light.

[0122] On the left side of the developing cartridge 100 in the left - right direction, there is also a locked portion 106 that cooperates with the locking portion 54 in the drum cartridge 50. When the developing cartridge 100 is installed into the drum cartridge 50, the locked portion 106 cooperates with the locking portion 54 on the drum cartridge 50, thereby stably holding the developing cartridge 100 in the drum cartridge 50 and preventing the developing cartridge 100 from accidentally falling out of the drum cartridge 50. On the rear side of the developing cartridge 100 in the front - rear direction, there are two forced - push protrusions 109. The two forced - push protrusions 109 extend backward from the rear side portion of the developing cartridge 100 on both sides in the left - right direction respectively. In the state where the developing cartridge 100 is installed into the drum cartridge 50, the forced - push protrusions 109 can receive the pushing force provided by the pushing portion 55 to move the developing roller 104 in the front - rear direction towards the direction close to the photosensitive drum 52, so that the developing roller 104 remains in close contact with the photosensitive drum 52. On both sides of the developing cartridge 100 in the left - right direction, there are also guiding portions 110. When observing at least a part of the guiding portions 110 in the left - right direction, they coincide with the developing roller shaft 104a. The guiding portions 110 are configured as columnar protrusions extending in the left - right direction. During the installation of the developing cartridge 100 into the drum cartridge 50, the guiding portions 110 cooperate with the guiding portions 56 in the drum cartridge to install the developing cartridge 100 in the correct position in the drum cartridge 50. In other embodiments of the present invention, the guiding portions 110 can also be formed by the developing roller shaft 104a extending out of the housing 101 in the left - right direction.

[0123] The developing cartridge 100 further includes a chip 108 for storing information of the developing cartridge 100. The chip 108 includes an electrical contact surface 108a and a storage portion (not shown). The electrical contact surface 108a can contact an electrical contact point (not shown) inside the imaging device. After the developing cartridge 100 is installed into the imaging device, the developing cartridge 100 can establish a communication connection with the imaging device to facilitate the imaging device to read the information of the developing cartridge 100, so that the imaging device can identify whether the installed developing cartridge 100 is compatible.

[0124] In order to ensure that the developer can be more smoothly transported from the inside of the housing 110 to the photosensitive drum 52, the developing cartridge 100 is also provided with a power - supply assembly 120 that can supply power to at least one of the developing roller 104, the powder - feeding roller 103, and the powder - discharging blade 107. The power - supply assembly 120 can receive power from outside the developing cartridge 100 and be electrically connected to at least one of the developing roller 104, the powder - feeding roller 103, and the powder - discharging blade 107 to ensure the stable transportation of the developer.

[0125] As Figures 6 - 7As shown, the electrodes in the developing cartridge 100 are different from those in the prior art. The power supply component 120 serving as the electrode includes a power connection terminal 121 to achieve electrical connection with the outside of the developing cartridge 100 and supply power to the developing cartridge 100. In the left-right direction, the power supply component 120 is located on the left side of the housing 101, and in the front-back direction, the power supply component 120 is close to the front end of the housing 101. Specifically, the power supply component 120 is arranged on the left side of the top of the developing cartridge 100, effectively utilizing the top space of the developing cartridge 100, making the structure of the developing cartridge 100 more compact and the layout of the developing cartridge 100 more reasonable. Thus, it is more conducive to meeting the miniaturization requirement in the length direction of the developing cartridge 100.

[0126] Specifically, the power supply component 120 includes, but is not limited to, a power connection terminal 121, a resistor 122, and a power supply terminal 123. When the developing cartridge 100 is installed on the drum cartridge 50, the power connection terminal 121 can be connected to the charger 57 serving as the power supply member on the drum cartridge 50. The power supply component 120 is closer to the left side of the housing 101 than the right side in the left-right direction. That is to say, the power supply component 120 is close to the left sides of the developing roller 104, the powder feeding roller 103, and the powder discharging blade 107 in the left-right direction and is electrically connected to at least one of the developing roller 104, the powder feeding roller 103, and the powder discharging blade 107. One end of the resistor 122 is electrically connected to the power connection terminal 121, and the other end of the resistor 122 is electrically connected to the power supply terminal 123. In this embodiment, the power supply terminal 123 is configured as a support plate for the developing roller 104 and the powder feeding roller 102, and the power supply terminal 123 is electrically connected to the developing roller 104 and the powder feeding roller 103 respectively.

[0127] The power supply terminal 123 is made of a conductive material. Preferably, the power supply terminal 123 is made of a conductive resin. The power supply terminal 123 includes a developing bearing 123a for supporting the developing roller 104 and a powder feeding bearing 123b for supporting the powder feeding roller 103. The developing bearing 123a and the powder feeding bearing 123b are in contact with and electrically connected to the developing roller shaft 104a of the developing roller 104 and the powder feeding roller shaft 103a of the powder feeding roller 103 respectively.

[0128] As Figure 6 shown, the resistor 122 is used to reduce the voltage of the power supply terminal 123. Specifically, the resistor 122 is used to reduce the voltage of the power supply terminal 123 to a voltage value suitable for the power supply terminal 123 to use.

[0129] As Figure 6 and Figure 8As shown, in a state where the developing cartridge 100 is installed in the drum cartridge 50, the power connection terminal 121 can be in contact with the charger 57 in the drum cartridge 50. To achieve a stable connection between the power connection terminal 121 in the developing cartridge 100 and the drum cartridge 50, the power supply assembly 120 further includes a connection member 124 provided at the power connection terminal 121. The power connection terminal 121 extends to a position below the side of the connection member 124 that is far from the power supply terminal 123 in the front-rear direction and is exposed outside the connection member 124. The connection member 124 is made of a conductive material. Preferably, the power connection terminal 121 is made of metallic iron or metallic copper; the power connection terminal 121 can be specifically configured as a wire made of iron.

[0130] Furthermore, each component in the power supply assembly 120 is connected by a wire or a flexible enameled wire.

[0131] As Figure 8 shown, the connection member 124 includes a limiting portion 124a and a fastening portion 124b. The limiting portion 124a cooperates with the opening 58 on the drum cartridge 50 to limit the movement of the connection member 124 and the drum cartridge 50 in the front-rear and left-right directions. In a state where the developing cartridge 100 and the drum cartridge 50 are engaged, the limiting portion 124a of the connection member 124 is inserted into the inside of the opening 58; the fastening portion 124b is configured as an elastic buckle, but is not limited thereto. The fastening portion 124b can also be configured as other structures to prevent the connection member 124 from falling off the drum cartridge 50. In this embodiment, taking the fastening portion 124b being configured as an elastic buckle as an example, when the connection member 124 is engaged with the drum cartridge 50, the fastening portion 124b cooperates with an edge of the drum frame 51 in the drum cartridge 50. That is to say, the connection member 124 is connected to the drum frame 51 of the drum cartridge 50 through the fastening portion 124b.

[0132] Furthermore, the power connection terminal 121 extends to a position below the limiting portion 124a, that is to say, the power connection terminal 121 is located below the limiting portion 124a in the up-down direction.

[0133] When the developing cartridge 100 is in use, the user installs the developing cartridge 100 in the drum frame 51 of the drum cartridge 50. Then, the user inserts the limiting portion 124a of the connection member 124 into the opening 58 of the drum cartridge 50. At this time, the power connection terminal 121 enters the inside of the opening 58 together with the limiting portion 124a and comes into contact with the charger 57 located below the opening 58. Through the contact between the power connection terminal 121 and the charger 57 in the drum cartridge 50, the power connection terminal 121 can receive the power of the charger 57; after the power connection terminal 121 is in contact with the charger 57, the connection member 124 is clamped to the drum frame 51 of the drum cartridge 50 through the fastening portion 124b configured as an elastic buckle to prevent the connection member 124 from detaching from the drum cartridge 50, thereby preventing the contact between the power connection terminal 121 and the charger 57 from detaching, and ensuring the stability of the contact between the power connection terminal 121 and the charger 57.

[0134] Embodiment 2

[0135] As Figures 9 - 10 shown, a developing cartridge according to Embodiment 2 of the present invention is shown. The same parts as those in Embodiment 1 described above will not be repeated in this embodiment. The differences between this embodiment and Embodiment 1 described above are as follows: The developing cartridge 100 includes a power supply component 130 different from that in Embodiment 1 described above. Specifically, the power supply component 130 further includes, but is not limited to, a power connection terminal 131, a first resistor 132, a second resistor 133, a power supply terminal 134, and a ground terminal 135. The connection between each component is as Figure 10 shown. The first end of the first resistor 132 is electrically connected to the power connection terminal 131, the second end of the second resistor 132 is electrically connected to the power supply terminal 134, the first end of the second resistor 133 is electrically connected to the second end of the first resistor 132 and the power supply terminal 134, and the second end of the second resistor 133 is electrically connected to the ground terminal 135.

[0136] After the developing cartridge 100 is installed on the drum cartridge 50, the power connection terminal 131 can contact the charger 57 of the drum cartridge 50, and the ground terminal 135 can contact the drum shaft 52a of the photosensitive drum 52 in the drum cartridge 50. When the drum cartridge 50 is installed on the imaging device, the drum shaft 52a is connected to the ground line in the imaging device. Specifically, the ground terminal 135 is configured as a conductive ring. Preferably, the ground terminal 135 is configured as a metal conductive ring; the inner diameter of the conductive ring is greater than the outer diameter of the drum shaft 52a, and the thickness of the conductive ring is less than 1.5 mm. In use, the conductive ring is sleeved on the outer surface of one end of the drum shaft 52a in the drum cartridge 50.

[0137] As Figure 10 shown, the second resistor 133 is connected in parallel with the power supply terminal 134 and each powered component of the developing cartridge 100.

[0138] Embodiment 3

[0139] As Figures 12 - 27 shown, a developing cartridge according to Embodiment 3 of the present invention is shown. The differences between this embodiment and Embodiments 1-2 described above are as follows: A power supply component 200 different from those in Embodiments 1-2 described above is provided in the developing cartridge of this embodiment. Specifically, Figure 11 a drum cartridge 50 cooperating with the developing cartridge 100 in the prior art is shown, Figures 12 - 27 and the developing cartridge 100 of this embodiment is shown. The drum cartridge 50 can be installed together with the developing cartridge 100 in an imaging device of the prior art to perform an imaging operation. The imaging device can be an electro-laser printer. A metal frame 11 ( Figure 25 ) electrically connected to the neutral line or the ground line of the power supply in the imaging device is provided inside the imaging device.

[0140] As Figure 11As shown, the drum cartridge 50 includes a drum frame body 51. The drum frame body 51 has a developing cartridge accommodating portion that accommodates the developing cartridge 100 and is configured as a cavity. A photosensitive drum 52 is arranged on the front side of the developing cartridge accommodating portion. The left end of the photosensitive drum 52 is connected to a photosensitive drum gear 53. The photosensitive drum gear 53 can be engaged with a gear (not shown in the drawings) in the imaging device to receive a driving force and rotate, and thus can drive the photosensitive drum 52 to rotate around a photosensitive drum axis extending in the left - right direction. The front - back direction intersects with the left - right direction. The drum cartridge 50 further includes a charger 57 disposed above the photosensitive drum 52 in the up - down direction. The charger 57 is a member that charges the photosensitive drum 52. In this embodiment, the charger 57 is specifically a grid - controlled corona charger. The drum frame 51 is provided with an opening 58 for exposing at least a part of the charger 57 to the outside; the opening 58 is located above the charger 57 in the up - down direction. The developing cartridge accommodating portion is further provided with guiding portions 56 on both sides in the left - right direction. The guiding portions 56 are used to guide the developing cartridge 100 to move to the correct position in the developing cartridge accommodating portion.

[0141] Figures 12 - 18 A developing cartridge 100 of the present invention is shown. The same parts as those in the above - mentioned Embodiments 1 - 2 will not be described herein again. To ensure the smooth delivery of the developer from the inside of the housing 110 to the photosensitive drum 52, the developing cartridge 100 is further provided with a power - connection assembly. The power - connection assembly includes a power - connection end, a power - supply end, and a step - down circuit. The power - connection end is connected to the charger 57 in the drum cartridge 50 to receive the power on the drum cartridge 50, and is transmitted to the developer - delivery components such as the developing cartridge 100 through the power - supply end. That is to say, compared with the prior art, the developing cartridge 100 in the present invention no longer has an electrode that directly contacts the imaging device electrically. In the present invention, the electrode of the developing cartridge 100 receives the power of the drum cartridge 50 by being electrically connected to the drum cartridge 50, so as to realize the smooth delivery of the developer. Specifically, the developing cartridge 100 includes a power - connection assembly 200 as an electrode. The power - connection assembly 200 is used to supply power to at least one of the developing roller 104, the powder - feeding roller 103, and the powder - discharging blade 107. The power - connection assembly 200 is disposed at the top of the housing 101 in the up - down direction. The power - connection assembly 200 is closer to the left side of the housing 101 than the right side of the housing 101 in the left - right direction. The power - connection assembly 200 is closer to the front side of the housing 101 than the rear side of the housing 101 in the front - back direction. Specifically, the power - connection assembly 200 is installed at the top of the powder bin 101a and is close to the left side in the left - right direction. The power - connection assembly 200 can receive power from outside the developing cartridge 100 and be electrically connected to at least one of the developing roller 104, the powder - feeding roller 103, and the powder - discharging blade 107, so as to make the delivery of the developer in the developing cartridge 100 smoother.

[0142] Specifically, as Figures 16 - 24As shown, the power connection assembly 200 includes a circuit board 210, a connecting arm 220, a protective cover 230, and a plurality of connecting members. The connecting members include, but are not limited to, a first connecting member 211 for connecting the circuit board 210 and the connecting plate 220, a second connecting member 241 for connecting the toner blade 107 and the circuit board 210, and a third connecting member 251 for connecting the circuit board 210 and the metal frame 11. The protective cover 230 is used to cover at least a part of the above-mentioned circuit board 210 and the plurality of connecting members to protect the circuit board 210 and the connecting members. To prevent short-circuit situations, the protective cover 230 and the powder bin 101a are made of insulating materials. The connecting arm 220 is used to receive external power. In this embodiment, the connecting arm 220 can contact and form an electrical connection with the charger 57 of the drum cartridge 50 to receive the power of the charger 57 in the drum cartridge 50. The connecting arm 220 extends in the front-rear direction. The connecting arm 220 is connected to the front side of the protective cover 230 in the front-rear direction. The connecting arm 220 is made of a conductive material to facilitate electrical connection. Preferably, the connecting arm 220 is made of a conductive resin material.

[0143] As Figure 18 shown, the circuit board 210 includes a plurality of resistors and a plurality of connection contacts. In this embodiment, the circuit board 210 includes two resistors and three connection contacts, that is, a first resistor 211, a second resistor 212, a power connection contact 213, a power supply contact 214, and a ground contact 215. The first resistor 211 and the second resistor 212 are connected in series. The second end of the first resistor 211 is electrically connected to the first end of the second resistor 212. The second end of the first resistor 211 and the first end of the second resistor 212 serve as a common connection end. The power connection contact 213 is electrically connected to the first end of the first resistor 211. The power supply contact 214 is electrically connected to the common connection end. The ground contact 215 is electrically connected to the second end of the second resistor 212.

[0144] Further, the resistance value R1 of the first resistor 211 is the same as the resistance value R2 of the second resistor 212. The value ranges of R1 and R2 are such that 5 MΩ ≤ R1 = R2 ≤ 10 MΩ. Preferably, in this embodiment, the resistance values of both the first resistor 211 and the second resistor 212 are 5 MΩ. In the state where the circuit board 210 is electrically connected, under the action of the first resistor 211 and the second resistor 212, the voltage at the power supply contact 214 is reduced to approximately 1 / 2 of the voltage at the power connection contact 213. The power connection contact 213 is electrically connected to the connecting arm 220 through the first connecting member 221, and the power supply contact 214 is electrically connected to at least one of the developing roller 104, the powder feeding roller 103, and the powder discharging blade 107. Preferably, in this embodiment, the powder discharging blade 107 is made of a conductive material, and the power supply contact 214 is electrically connected to the powder discharging blade 107. A bracket for supporting the developing roller 104 and the powder feeding roller 103 is provided on the first side of the housing 101. That is to say, the bracket rotatably supports the left ends of the developing roller 104 and the powder feeding roller 103. The bracket is made of a conductive material. Preferably, the bracket is made of a conductive resin material. The powder discharging blade 107 is electrically connected to the bracket, and the bracket is electrically connected to the developing roller 104 and the powder feeding roller 103 respectively, realizing power supply from the developing cartridge 100 to at least one of the developing roller 104, the powder feeding roller 103, and the powder discharging blade 107.

[0145] Further, as Figures 19 - 20 shown, the first connecting member 221, the second connecting member 241, and the third connecting member 251 are all configured as elastic conductive members. That is to say, the connection between each connecting member and the circuit board 210 is an elastic connection to improve the connection stability between each of the above connecting members and the circuit board 210. Specifically, the first connecting member 221 is configured as a torsion spring. The first connecting member 221 includes a first end 221a and a second end 221b. The first end 221a is connected to the power connection contact 213 of the circuit board 210, and the second end 221b is connected to the connecting arm 220, so that the circuit board 210 receives external power through the connecting arm 220. A groove 221c is provided on the connecting arm 220 ( Figure 23), at least a part of the second end portion 221b is clamped inside the groove 221c to make the contact between the connecting arm 220 and the second end portion 221b more stable. Both end portions of the second connecting member 241 are configured as spring structures to make the contact between the second connecting member 241, the circuit board 210, and the toner discharging blade 107 more stable. The second connecting member 241 includes a first connecting end 241a and a second connecting end 241b. The first connecting end 214a is connected to the power supply contact 214 of the circuit board 210, and the second connecting end 214b is electrically connected to the developer conveying member in the developing cartridge 100. In this embodiment, the second connecting end 241b is connected to the toner discharging blade 107. In other embodiments of the present invention, the second connecting end 241b may also be electrically connected to the developing roller 104 or the powder feeding roller 103. Optionally, the second connecting end 241b may be electrically connected to at least one of the toner discharging blade 107, the developing roller 104, and the powder feeding roller 103, and then the developer is charged through the contact with at least one of the above three, so as to make the conveying of the developer smoother. The third connecting member 251 is farther from the rotation axis A1 of the developing roller 104 than the rotation axis A2 of the driving gear 111 in the up and down direction. Both end portions of the third connecting member 251 are configured as spring structures to make the contact between the third connecting member 251, the circuit board 210, and the metal frame 11 more stable. The third connecting member 251 includes a third connecting end 251a and a fourth connecting end 251b. The third connecting end 251a contacts the ground contact 215 of the circuit board 210, and at least a part of the fourth connecting end 251b is exposed at the top of the developing cartridge 100 and contacts the metal frame 11 of the imaging device. The metal frame 11 inside the imaging device is electrically connected to the ground protection circuit of the imaging device to prevent the danger caused by electric leakage of the imaging device. That is to say, the ground contact 215 of the circuit board 210 is electrically connected to the ground protection circuit of the imaging device, improving the safety of using the developing cartridge 100.

[0146] As Figures 21 - 22As shown, an accommodation cavity 231 is provided inside the protective cover 230. In this embodiment, the accommodation cavity 231 is used to accommodate the circuit board 210. In other embodiments of the present invention, the accommodation cavity 231 can also be used to accommodate a plurality of interconnected electronic components, and these interconnected electronic components have functions similar to those of the circuit board 210, which will not be elaborated here. The circuit board 210 is detachably installed in the accommodation cavity 231 by means of elastic buckles 231a or screws. In this embodiment, elastic buckles 231a are provided on both sides of the accommodation cavity 231 in the front-back direction and / or the left-right direction to detachably install the circuit board 231 inside the accommodation cavity 231. A through hole 232 is also provided at the top of the protective cover 230 for exposing the third connecting member 251 at the top of the developing cartridge 100. The through hole 232 is located on the side of the protective cover 230 away from the developing roller 104 in the front-back direction, and at least a part of the third connecting member 251 is exposed at the top of the protective cover 230 through the through hole 232. The protective cover 230 is also provided with screw holes 233 for connecting the protective cover 230 to the housing 101. In this embodiment, the protective cover 230 is fixedly connected to the top of the housing 101 in the up-down direction by means of screws. In other embodiments of the present invention, the protective cover 230 can also be fixedly connected to the top of the housing 101 by means of elastic buckles, etc. This is not limited, as long as it is ensured that the protective cover 230 is fixedly connected to the top of the housing 101.

[0147] As Figure 23 shown, the connecting arm 220 is movably connected to the front end of the protective cover 230 in the front-back direction. One end of the connecting arm 220 is provided with a connecting shaft 220a, and the connecting arm 220 can rotate around the axis extending in the left-right direction of the connecting shaft 220a. The other end of the connecting arm 220 is provided with an electrical contact portion 220b, and the electrical contact portion 220b is configured as a protrusion extending outward from the bottom outer surface of the connecting arm 220 from the bottom of the connecting arm 220. The electrical contact portion 220b is located at the front end of the connecting arm 220 in the front-back direction. In the state where the developing cartridge 100 is installed in the drum cartridge 50, the electrical contact portion 220b contacts the charger 57 inside the drum cartridge 50 to receive the power from the drum cartridge 50; the first connecting member 221 is configured as a torsion spring, and the first connecting member 221 is connected between the connecting arm 220 and the circuit board 210, and is used to maintain the electrical connection between the connecting arm 220 and the circuit board 210 while keeping the connecting arm 220 in a position close to the housing 101 in the up-down direction, so that the electrical contact portion 220b is located inside the opening 58 to contact the charger 57 in the state where the developing cartridge 100 is installed in the drum cartridge 50, thereby enabling the developing cartridge 100 to receive the power from the drum cartridge 50.

[0148] Furthermore, as Figures 22 - 24As shown, the protective cover 230 further includes a connection hole 234 and a receiving groove 234a for receiving the connecting arm 220. The connecting arm 220 is rotatably mounted at the front end of the protective cover 230 through the cooperation of a connecting shaft 220a and the connection hole 234. At least a part of the connecting arm 220 is located inside the receiving groove 234a. The connecting arm 220 can move between a first position and a second position relative to the housing 101 about the axis of the connecting shaft 220a. The first position is the position where the developing cartridge 100 can be conveniently installed inside the drum cartridge 50, and the second position is the position of the connecting arm 220 when the developing cartridge 100 is in a connected state with the drum cartridge 50. In the second position of the connecting arm 220, the developing cartridge 100 and the drum cartridge 50 form an electrical connection. The first connecting member 221 is used to hold the connecting arm 220 in the second position; a limiting groove 220d is provided at the rear end of the connecting arm 220 in the front-rear direction, and a limiting protrusion 234b cooperating with the limiting groove 220d is provided at the rear end of the receiving groove 234a in the front-rear direction to limit the movement of the connecting arm 220 in the left-right direction. As Figure 24 shown, in the figure, the connecting arm 220(a) is the state when the connecting arm 220 is in the first position, and the connecting arm 220(b) in the figure is the state when the connecting arm 220 is in the second position.

[0149] The following further describes the process of electrical connection between the developing cartridge 100 and the drum cartridge 50. A guiding surface 220c is provided at the front end of the connecting arm 220 in the front-rear direction( Figure 23 ), as Figures 23 - 26 shown, when the developing cartridge 100 is installed on the drum cartridge 50, the user applies a thrust to the developing cartridge 100 to push the developing cartridge 100 to move forward along the guiding portion 56 of the drum cartridge 50 from the rear. During the movement of the developing cartridge 100, the guiding surface 220c can abut against the drum frame 51 of the drum cartridge 50. Under the continuous action of the thrust, the developing cartridge 100 continues to move forward along the guiding portion 56. The guiding surface 220c is subjected to the abutting force of the drum frame 51 and moves from the second position to the first position relative to the housing 101. The connecting arm 220 in the first position can prevent interference between the connecting arm 220 and the drum frame 51 and ensure that the developing cartridge 100 can be smoothly installed inside the drum cartridge 51; after the developing cartridge 100 is installed on the drum cartridge 50, under the action of the first connecting member 221, the connecting arm 220 moves from the first position to the second position. During the movement of the connecting arm 220, the electrical contact portion 220b of the connecting arm 220 enters the opening 58 of the drum cartridge 50 and contacts the charger 57, thereby establishing an electrical connection between the developing cartridge 100 and the drum cartridge 50 so that the developing cartridge 100 can receive the power of the drum cartridge 50.

[0150] As Figures 14 - 15 and Figures 25 - 27As shown, the electrical contact portion 220b is closer to the first side of the housing 101 than the second side of the housing 101 in the left - right direction. The electrical contact portion 220b is located on the right side of the cover 103 in the left - right direction, and the electrical contact portion 220b is located on the right side of the electrical contact surface 108a in the left - right direction. Further, the electrical contact portion 220b and the electrical contact surface 108a are spaced apart in the front - back direction. The electrical contact portion 220b is farther from the rotation axis A2 of the drive gear 111 than the rotation axis A1 of the developing roller 104 in the front - back direction, preventing interference between the electrical contact surface 108a and the electrical contact portion 220b. The connecting arm 220 extends out of the housing 101 from back to front in the front - back direction. The electrical contact portion 220b is located in front of the developing roller 104 in the front - back direction. After the developing cartridge 100 is installed on the drum cartridge 50, the connecting arm 220 can extend above the charger 57 in the drum cartridge 50 to facilitate the contact between the electrical contact portion 220b and the charger 57 in the drum cartridge 50.

[0151] Further, the power - connection assembly 200 is arranged close to the left side of the developing cartridge 100 in the left - right direction, as Figure 27 shown. The connecting arm 220 further includes a rod body 220d for connecting the connecting shaft 220a and the electrical contact portion 220b. The distance between the right - hand side wall of the rod body 220d and the left - most end of the drive gear 111 is L1. L1 should be less than or equal to 50 mm to prevent the rod body 220d from blocking the laser channel of the imaging device and causing imaging defects; L1 should be greater than or equal to 20 mm so that the electrical contact portion 220b of the connecting arm 220 can conveniently enter the inside of the opening 58 to achieve electrical connection. An avoidance surface 230a is provided at a position on the right - hand side of the protective cover 230 close to the developing roller 104 in the front - back direction. The distance between the avoidance surface 230a and the left - most end of the drive gear 111 is L2. L2 should be less than or equal to 53 mm to prevent the protective cover 230 from blocking the laser channel of the imaging device and causing imaging defects; specifically, in this embodiment, L1 is set to 35 mm and L2 is set to 49 mm. The electrical contact portion 220b on the connecting arm 220 is configured as a triangular prism extending in the left - right direction. The length of 220b in the left - right direction is L3. To enable the electrical contact portion 220b to smoothly enter the inside of the opening 58 and at the same time have sufficient contact area with the charger 57, the value range of L3 is: 2 mm ≤ L3 < 10 mm; the distance between the right - most end of the electrical contact portion 220b and the left - most end of the drive gear 111 is L4. To enable the electrical contact portion 220b to be within the projection range of the opening 58 in the up - down direction when the developing cartridge 100 is installed on the drum cartridge 50, the value range of L4 should be: 31 mm < L4 < 41 mm; specifically, in this embodiment, L3 is set to 8 mm and L2 is set to 40 mm.

[0152] Embodiment 4:

[0153] AsFigures 28 - 38 Shown is a developing cartridge according to Embodiment 4 of the present invention. The same parts as those in the above Embodiments 1-3 will not be described again in this embodiment. The difference between this embodiment and the above Embodiments 1-3 lies in that the grounding setting in the developing cartridge 100 of this embodiment is different. Specifically, the developing cartridge 100 includes a storage chip 308, and the storage chip 308 is used to store information of the developing cartridge 100.

[0154] As Figures 28 - 29 shown, the storage chip 308 has a plurality of electrical contact surfaces 309. The plurality of electrical contact surfaces 309 are arranged in the left-right direction, and the electrical contact surfaces 309 are made of metal as a conductor. When the developing cartridge 100 is installed in the imaging device, the electrical contact surfaces 309 are in contact with the electrical contacts of the imaging device. Therefore, the electrical terminals are electrically connected to the electrical contact surfaces 309. As a result, the imaging device can perform at least one of reading information from the storage chip 308 and writing information to the storage chip 308.

[0155] The plurality of electrical contact surfaces 309 have SIO (data) terminals 309A, GND (ground) terminals 309B, SCK (serial clock) terminals 309C, and PWR (power supply) terminals 291D. Specifically, the plurality of electrical contact surfaces 309 at least have GND (ground) terminals 309B. In a state where the developing cartridge 100 is installed in the imaging device, the GND (ground) terminals 309B can be electrically connected to the negative electrode of the power supply in the imaging device or the ground circuit in the imaging device; the storage chip 308 further includes a second electrical contact portion 308b different from the plurality of electrical contact surfaces 309, and the second electrical contact portion 308b is electrically connected to the GND (ground) terminals 309B among the plurality of electrical contact surfaces 309. Therefore, the second electrical contact portion 308b is electrically connected to the GND (ground) terminals 309B.

[0156] To ensure the smooth conveyance of the developer inside the developing cartridge 100, an electricity connection component 300 is provided on the developing cartridge 100. The electricity connection component 300 includes an electricity connection end, a power supply end, and a step-down circuit. The electricity connection component 300 includes a circuit board 310, a connecting arm 320, a protective cover 330, and a plurality of connecting members. Similar to Embodiment 3 above, the connecting members include, but are not limited to, a first connecting member 321 for connecting the circuit board 310 and the connecting plate 320, and a second connecting member 341 for connecting the toner blade 107 and the circuit board 310.

[0157] As Figure 32 shown, in this embodiment, the circuit board 310 is not electrically connected to the metal frame inside the imaging device. Therefore, in this embodiment, the connecting member further includes a third connecting member 351 for electrically connecting the circuit board 310 and the second electrical contact portion 308b in the storage chip 308.

[0158] The first connecting member 321, the second connecting member 341, and the third connecting member 351 are all made of conductive materials. Preferably, the first connecting member 321, the second connecting member 341, and the third connecting member 351 are all made of conductive metal materials. The first connecting member 321 and the second connecting member 341 are similar to those in Embodiment 3 above, and will not be elaborated here. The third connecting member 351 has a first end 351a and a second end 351b. The first end 351a of the third connecting member 351 is electrically connected to the circuit board 310, and the second end 351b of the third connecting member 351 is electrically connected to the storage chip 308.

[0159] As Figures 32 - 35 shown, similar to Embodiment 3 above, the circuit board 310 includes a first resistor 311, a second resistor 312, an electrical contact 313, a power supply contact 314, and a ground contact 315. The third connecting member 351 extends from the top of the developing cartridge 100 to the bottom of the developing cartridge 100 in the up-down direction. The first end 351a of the third connecting member 351 is electrically connected to the ground contact 315 of the circuit board 310, and the second end 351b of the third connecting member 351 is electrically connected to the second contact portion 310 of the storage chip 308. Therefore, the ground contact 315 of the circuit board 310 is electrically connected to the second electrical contact portion 30pb of the storage chip 308. Further, the ground contact 315 of the circuit board 310 is electrically connected to the GND (ground) terminal 309B of the storage chip 308. That is to say, in this embodiment, the developing cartridge 100 is electrically connected to the storage chip 308 through the power connection assembly 300, realizing the grounding setting of the power connection assembly 300 in the developing cartridge 100, with a simpler structure and being more conducive to miniaturizing the developing cartridge 100. Further, the power connection assembly 300 realizes a voltage reduction function. Under the action of the power provided by the power connection assembly 300, the developer inside the developing cartridge 100 is smoothly transported to the photosensitive drum 52 of the drum cartridge 50, realizing the developing function of the developing cartridge 100.

[0160] Specifically, as Figures 31 - 32 and Figures 36 - 37 shown, the connecting arm 320 can move between a first position and a second position relative to the housing 101. The first position of the connecting arm 320 is the folded position of the connecting arm 320. When the connecting arm 320 is in the first position, the connecting arm 320 is folded above the housing 101, making it more convenient for the manufacturer of the developing cartridge 100 to package and transport the developing cartridge 100. The second position of the connecting arm 320 is the unfolded position of the connecting arm 320. When the connecting arm 320 is in the second position, the connecting arm 320 contacts the charger in the drum cartridge, thereby realizing electrical conduction between the connecting arm 320 and the drum cartridge, and thus realizing the power connection of the developing cartridge 100.

[0161] To achieve the movement of the connecting arm 320 between the first position and the second position, the developing cartridge 100 is further provided with a driving assembly for driving the connecting arm 320 to move from the first position to the second position. During the process of installing the developing cartridge 100 onto the drum cartridge, at least a part of the driving assembly can abut against the drum cartridge to drive the connecting arm 320 to move from the first position to the second position. The driving assembly is arranged on the left side of the housing 101 in the left-right direction and is located between the housing 101a and the left cover 101b in the left-right direction.

[0162] Furthermore, the connecting arm 320 includes a shaft 320b and a gear portion 320c coaxially arranged with the shaft 320b. The shaft 320b extends in the left-right direction, and the connecting arm 320 can rotate around the shaft 320b between the first position and the second position. The gear portion 320c is configured as a driven portion for receiving a driving force to drive the connecting arm 320 to move from the first position to the second position. The developing cartridge 100 is further provided with a reset member for applying a restoring force to the connecting arm 320, so that the connecting arm 320 moves from the second position to the first position. In this embodiment, the reset member is set as the first connecting member 321, and the first connecting member 321 is configured as a conductive torsion spring.

[0163] The driving assembly at least includes but is not limited to a force-receiving member and a force-applying member. As Figure 31 and Figures 36 - 37 shown, in this embodiment, the developing cartridge 100 includes a force-receiving rod 361 and a force-applying member 362. The force-receiving rod 361 and the force-applying member 362 are both arranged on the left side of the housing 101 and can move relative to the housing 101 between the first position and the second position. When the force-receiving rod 361 is in the first position, the first end 361a of the force-receiving rod 361 is located at the bottom of the housing 101 in the up-down direction. When the developing cartridge 100 is installed onto the drum cartridge, under the action of the downward pressing force applied by the user to the developing cartridge 100, the first end 361a of the force-receiving rod 361 can abut against the drum frame 51 in the drum cartridge 50. At this time, the drum frame 51 generates a reaction force on the force-receiving rod 361, thereby driving the force-receiving rod 361 to move from the first position to the second position. The force-applying member 362 can move according to the movement of the force-receiving rod 361. The force-applying member 362 is used to drive the connecting arm 320 to move from the first position to the second position. In the up-down direction, the force-applying member 362 is closer to the upper part of the developing cartridge 100 than the force-receiving member 361. In the left-right direction, the force-applying member 362 is closer to the left side of the housing 101 than the electrical contact portion 320a on the connecting arm 320.

[0164] Further, the force-applying member 362 can move from the first position to the second position according to the movement of the force-receiving member 361. The force-applying member 362 at least includes a tooth portion connected to the connecting arm 320 to drive the connecting arm 320 to move from the first position to the second position. In this embodiment, the force-applying member 362 is configured as a rack. The force-applying member 362 has a first tooth portion 362a and a second tooth portion 362b. The first tooth portion 362a of the force-applying member 362 is used to receive the driving force of the force-receiving member 361 and move relative to the housing 101 in the front-rear direction. The second tooth portion 362b is used to connect with the gear portion 320c of the connecting arm 320 to drive the connecting arm 320 to move from the first position to the second position.

[0165] Further, the developing cartridge 100 further includes a transmission member 363 connected between the force-receiving member 361 and the force-applying member 362. The transmission member 363 includes a force-receiving portion 363a connected to the second end 361b of the force-receiving member 361a, and a force-applying portion 363b connected to the first tooth portion 362a of the force-applying member 362, for transmitting the driving force of the force-receiving member 361 to the force-applying member 262.

[0166] As Figure 30 and Figure 38 shown, in this embodiment, the developing cartridge 100 includes a detected portion different from those in the above Embodiments 1-3. When the developing cartridge 100 is installed in the imaging device, the detected portion of the developing cartridge 100 is used to transmit the information of the developing cartridge 100 to the imaging device, so that the imaging device can identify the developing cartridge 100. Specifically, the developing cartridge 100 includes a light-emitting member 317 as the detected portion. The light-emitting member 317 can transmit the information of the developing cartridge 100 to the imaging device by intermittently emitting infrared light. The developing cartridge 100 further includes a control chip 317a and a trigger switch 317b. The control chip 317a is used to control the lighting and extinguishing of the light-emitting member 317 and supply power to the light-emitting member 317. The trigger switch 317b can send a start signal to the control chip 317a in response to the rotation of the drive gear 111, thereby triggering the chip 317 to start. Further, the developing cartridge 100 further includes a trigger gear 317c for contacting the trigger switch 317b. The trigger gear 317c can rotate around the trigger gear axis extending in the left-right direction according to the rotation of the drive gear 111, and has a contact position and a non-contact position with the trigger switch 317b. When the trigger gear 317c is in the contact position, the trigger gear 317c contacts the trigger switch 317b to cause the trigger switch 317b to release an activation signal to the control chip 317a, thereby activating the control chip 317a to control the light-emitting member 317 to transmit the information of the developing cartridge 100 to the imaging device. When the trigger gear 317c is in the non-contact position, the trigger switch 317b stops releasing the activation signal to the control chip 317a, so that the control chip 317b remains in the sleep state, thereby effectively controlling the light-emitting member 317.

[0167] The setting of the light-emitting member 317 replaces the function of the detected protrusion, simplifies the structure of the developing cartridge 100, reduces the production cost of the developing cartridge 100, and is beneficial to the miniaturization of the developing cartridge 100. At the same time, the design of the light-emitting member 317 has higher stability compared with the mechanical components used in the prior art.

[0168] Example 5:

[0169] As Figures 39 - 43 shows a developing cartridge according to Example 5 of the present invention. The same parts as those in the above Example 4 will not be described in detail in this example. The difference between this example and the above Example 4 is that the setting of the storage chip in the developing cartridge 100 of this example is different from that in the above example. Specifically, the developing cartridge 100 includes a storage chip 408 and a chip bracket 410 for supporting the storage chip 408. The storage chip 408 is used to store information of the developing cartridge 100.

[0170] As Figure 39 and Figure 41 shown, the storage chip 408 is disposed on the left side of the developing cartridge 100 in the left-right direction. The storage chip 408 includes a plurality of electrical contact surfaces 409, and the electrical contact surfaces 409 face upward of the developing cartridge 100 in the up-down direction. The plurality of electrical contact surfaces 409 at least include a GND (ground) terminal 409b. In a state where the developing cartridge 100 is installed in the imaging device, the GND (ground) terminal 409b is electrically connected to the negative electrode of the power supply in the imaging device or the ground circuit in the imaging device. The developing cartridge 100 further includes a second electrical contact portion 408b, and the second electrical contact portion 408b is disposed at an interval from the electrical contact surface 409, and the second electrical contact portion 408b is electrically connected to the GND (ground) terminal 409b.

[0171] As shown in the above Example 4, the developing cartridge 100 further includes a power connection assembly 300. The power connection assembly 300 includes a circuit board 310, a connecting arm 320, a protective cover 330, and a plurality of connecting members. The circuit board 310 includes a first resistor 311, a second resistor 312, a power connection contact 313, a power supply contact 314, and a ground contact 315. As Figure 40 shown, the developing cartridge 100 further includes an electrical connecting member 451 for connecting the power connection assembly 300 and the storage chip 408. The electrical connecting member 451 includes a first end 315a in contact with the ground contact 315 in the circuit board 310, and a second end 315b in contact with the second contact portion 408b in the storage chip 408 in the developing cartridge 100. That is to say, the ground contact 315 of the circuit board 310 is electrically connected to the second electrical contact portion 408b of the storage chip 408 through the electrical connecting member 315. At least a part of the electrical connecting member 315 extends in the left-right direction.

[0172] AsFigure 40 and Figures 42 - 43 As shown in Figures 42 - 43 , the developing cartridge 100 further includes a chip bracket 410 for supporting the storage chip 408. The chip bracket 410 is disposed on the left side of the developing cartridge 100 in the left - right direction. Specifically, the cover 101b is fixedly disposed on the left - hand surface of the powder cartridge 101 in the left - right direction. The chip bracket 410 is fixedly connected to the outer side of the cover 101b away from the powder cartridge 101 by means of screws / elastic buckles, etc. in the left - right direction. In the left - right direction, the electrical contact surface 409 and the connecting arm 320 are spaced apart. In the front - rear direction, in the installed state, the electrical contact portion 320a of the connecting arm 320 is disposed at the front end of the developing cartridge 100, while the electrical contact surface 409 is close to the rear end of the developing cartridge 100. That is to say, the electrical contact surface 409 and the electrical contact portion 320a are far apart in the developing cartridge 100, avoiding electrical interference between the power - connecting component 300 and the storage chip 408, and improving the stability of the power - connecting component 300 and the storage chip 408 of the developing cartridge 100.

[0173] Embodiment 6:

[0174] As Figures 44 - 45 shown in Figures 44 - 45 , a developing cartridge of Embodiment 6 of the present invention is shown. The same parts as those in the above - mentioned Embodiment 5 will not be described herein again. The differences between this embodiment and the above - mentioned Embodiment 5 are as follows: The developing cartridge 100 in this embodiment has a different setting from that in the above - mentioned Embodiment 5. Specifically, in this embodiment, the developing cartridge 100 includes a forced - push portion 506 and a lifted portion 520.

[0175] As Figures 44 - 45 shown in Figures 44 - 45 , the forced - push portion 506 is disposed on both sides of the housing 101 in the left - right direction. In the state where the developing cartridge 100 is installed in the drum cartridge, the forced - push portion 506 receives the force applied by the forced - push portion in the drum cartridge to the developing cartridge 100, which makes the developing roller 120 in the developing cartridge 100 approach the photosensitive drum in the drum cartridge. The forced - push portion 506 extends in the left - right direction. Specifically, the forced - push portion 506 is configured as a cylinder extending outward from the side surface of the powder cartridge 101a in the left - right direction. As Figure 45 shown in Figure 45 , in the state where the developing cartridge 100 is installed in the drum cartridge, the forced - push portion 506 is located between the electrical contact portion 320a of the connecting arm 320 and the electrical contact surface 409 of the storage chip 408 in the front - rear direction. Thus, when the developing cartridge 100 is installed in the drum cartridge, the forced - push portion 506 can better receive the force applied by the drum cartridge to the developing cartridge 100 to make the developing roller 120 approach the photosensitive drum, so as to make the connection between the electrical contact portion 320a of the developing cartridge 100 and the charger in the drum cartridge more stable.

[0176] As Figure 45As shown, the lifted part 520 is arranged at the rear side of the housing 101 in the front-rear direction. In a state where the developing cartridge 100 is installed in the imaging device, the lifted part 520 can receive the force applied by the imaging device to the developing cartridge 100, so that the electrical contact surface 409 of the developing cartridge 100 approaches the power connection member inside the imaging device. In the front-rear direction, the lifted part 520 is arranged at both ends of the developing cartridge 100 opposite to the electrical contact part 320a, thereby avoiding interference between the electrical contact part 320a of the developing cartridge 100 and the imaging device.

[0177] As Figures 44 - 45 shown, in the front-rear direction, the electrical contact part 320a, the developing roller 120, the forced push part 506, the electrical contact surface 409, and the lifted part 520 are arranged from front to back. When the lifted part 520 receives the force of the imaging device, the lifted part 520 drives the rear side of the developing cartridge 100 to tilt upward around the rotation axis of the developing roller 120, and the electrical contact surface 409 moves upward together with the rear side of the developing cartridge 100 and contacts the power connection member inside the imaging device, so that the storage chip 408 of the developing cartridge 100 establishes an electrical connection with the imaging device. At the same time, driven by the lifted part 520, the electrical contact part 320a located in front of the rotation axis of the developing roller 120 in the front-rear direction moves downward and contacts the charger of the drum cartridge more closely, thereby improving the stability of the electrical connection between the power connection component 300 of the developing cartridge 100 and the charger of the drum cartridge.

[0178] As Figure 45 shown, the electrical contact part 320a is arranged at the front end of the connecting arm 320 in the front-rear direction, and the electrical contact part 320a extends an extension part 320a1 in the up-down direction. The extension part 320a1 is made of a deformable conductive material, so that the electrical contact part 320a can adapt to a larger production error and improve the adaptability of the developing cartridge 100. Preferably, the extension part 320a1 is made of a conductive rubber material.

[0179] Example 7:

[0180] As Figures 46 - 54 shown, a developing cartridge of Example 7 in the present invention is shown. The same parts as those in the above Example 6 will not be described in detail in this embodiment. The differences between this embodiment and the above Example 6 are as follows: The settings of the forced push part, the gear train, and the power connection component 300 in the developing cartridge 100 of this embodiment are different from those in the above Examples 1-6.

[0181] Specifically, as Figures 46 - 50As shown, on both sides of the developing cartridge 100 in the left - right direction, there are guide portions 601 extending outward. When observed in the left - right direction, at least a part of the guide portion 601 overlaps with the developing roller 120. The developing cartridge 100 further includes a separated portion 602 and a pushed portion 603. The separated portion 602 can receive a force outside the developing cartridge 100 to drive the developing cartridge 100 in the direction of separating the developing roller 120 from the photosensitive drum of the drum cartridge. The pushed portion 603 can receive a force outside the developing cartridge 100 to drive the developing cartridge 100 in the direction of bringing the developing roller 120 into contact with the photosensitive drum of the drum cartridge. In this embodiment, the guide portion 601, the separated portion 602, and the pushed portion 603 are integrally formed. A cover plate 606 is provided at the bottom of the developing cartridge 100, and the cover plate 606 extends in the left - right direction. In the front - back direction, the cover plate 606 overlaps at least a part of the guide portion 601, the separated portion 602, and the pushed portion 603, improving the anti - deformation strength of the housing 101 in the left - right direction.

[0182] As Figures 51 - 53 shown, the developing cartridge 100 includes a gear train for driving components inside the developing cartridge 100. The gear train includes, but is not limited to, a coupling gear 611, a developing roller gear 612, a powder feeding roller gear 613, and a plurality of connecting gears. The coupling gear 611 is used to receive a driving force outside the developing cartridge 100. The powder feeding roller gear 613 is connected to the coupling gear 611. The developing roller gear 612 is connected to the coupling gear 611 through the connecting gears. The number of connecting gears provided between the developing roller gear 612 and the coupling gear 611 is an even number. That is to say, there are 2n (n is a positive integer) connecting gears provided between the developing cartridge 612 and the coupling gear 611. Specifically, in this embodiment, a first connecting gear 615 and a second connecting gear 616 are provided between the developing cartridge 612 and the coupling gear 611. In the front - back direction, at least a part of the pushed portion 603 is closer to the developing roller 120 than the coupling gear 611.

[0183] The developing cartridge 100 is further provided with a stirring frame and a stirring frame gear 614 connected to the end of the stirring frame. The stirring frame gear 614 is meshed and connected to the coupling gear 611 through a third connecting gear 617. In the front - back direction, the rotation axis of the stirring frame gear 614 is closer to the developing roller 120 than the rotation axis of the third connecting gear 617.

[0184] Combined Figures 46 - 48 and Figures 53 - 54 shown, the developing cartridge 100 includes an electricity - connecting component 300 as an electrode. The electricity - connecting component 300 is closer to the left side of the developing cartridge 1000 than to the right side of the developing cartridge 100 in the left - right direction. The electricity - connecting component 300 includes a connecting arm 320 extending in the front - back direction, and an electrical contact portion 620a is provided at the end of the connecting arm 320 in the front - back direction. As Figure 54As shown, the drum cartridge 50 includes a photosensitive drum 52 and a charger 57. The charger 57 is disposed on one side in the radial direction of the photosensitive drum 52 and is used to charge the photosensitive drum 52. At least a part of the charger 57 is exposed through the laser port of the drum cartridge 50. The laser port of the drum cartridge 50 is configured as an opening for exposing the photosensitive drum 52 in the drum cartridge 50 when the drum cartridge 50 is installed in the imaging device so that the laser member in the imaging device irradiates the photosensitive drum 52. As Figure 54 As shown, in a state where the developing cartridge 100 is installed in the drum cartridge 50, the electrical contact portion 620a of the developing cartridge 100 passes through the laser port of the drum cartridge 50 and is connected to the charger 57 of the drum cartridge 50. Thus, the electrical contact portion 620a receives the power on the charger 57 in the drum cartridge 50 and delivers the power to the developer conveying member in the developing cartridge 100.

[0185] Furthermore, the electrical contact portion 620a is made of a deformable conductive material so that the electrical contact portion 620a can more easily contact the charger 57. In this way, the requirement for the processing accuracy of the developing cartridge 100 can be effectively reduced. Specifically, in this embodiment, the electrical contact portion 620a is set as conductive rubber.

[0186] Still further, as Figure 54 As shown, the developing cartridge 100 includes a chip 608. The chip 608 has an electrical contact surface 609 electrically connected to the imaging device. The electrical contact surface 609 at least includes a GND (ground) terminal. The chip 608 is fixedly supported on the left side of the developing cartridge 100 in the left-right direction by a chip bracket 610. The power connection assembly 300 of the developing cartridge 100 includes a circuit board 310. An electrical connection member 651 is disposed between the circuit board 310 and the chip 608. At least a part of the electrical connection member 651 extends in the left-right direction. The first end 651a of the electrical connection member 651 is electrically connected to the ground terminal 315 of the circuit board 310, and the second end 651b of the electrical connection member 651 is electrically connected to the GND (ground) terminal of the chip 608.

[0187] Functions and beneficial effects:

[0188] In multiple solutions of the present invention's developing cartridge, through the redesign of the power supply device, the developing cartridge can receive the power on the drum cartridge and transfer it to the developing roller, powder feeding roller, and powder discharging blade, thereby ensuring the imaging quality of the developing cartridge; at the same time, the direct contact between the developing cartridge and the electrophotographic imaging device is reduced, avoiding the mutual collision between the developing cartridge and the electrophotographic imaging device caused by the vibration generated when the developing cartridge works, effectively improving the service life of the developing cartridge and the electrophotographic imaging device; in addition, the power supply device for supplying power to the developing cartridge on the electrophotographic imaging device can be cancelled, reducing the production cost of the electrophotographic imaging device.

[0189] 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 described in the foregoing embodiments, or perform equivalent replacements for 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 various embodiments of the present invention.

Claims

1. A developing cartridge that can be detachably mounted to a drum cartridge, the developing cartridge comprising: A housing for containing a developer, the housing having a first side and a second side separated in a first direction, and the housing having a third side and a fourth side separated in a second direction that intersects the first direction; A developing roller rotatable about a developing roller axis extending in the first direction, and in the second direction, the developing roller is located on the third side of the housing; An input gear for receiving a driving force from outside the developing cartridge, the input gear rotatable about an input gear axis extending in the first direction, and in the first direction, the input gear is located on the first side of the housing; A chip having an electrical contact surface, the electrical contact surface being located on the first side of the housing; Characterized in that it further comprises an electrode electrically connected to a component of the developing cartridge; The electrode includes a power connection portion that can contact a power supply member outside the developing cartridge; In the first direction, the power connection portion is closer to the first side of the housing than to the second side of the housing.

2. The developing cartridge according to claim 1, wherein The electrode further includes a power supply portion and a ground portion; The power supply portion can contact and be electrically connected to a component of the developing cartridge, and the ground portion is for contacting a ground member outside the developing cartridge and / or the negative pole of a power supply; The power supply portion and the ground portion can be electrically connected to the power connection portion.

3. The developing cartridge according to claim 2, wherein, In the first direction, the power supply portion is closer to the first side of the housing than to the second side of the housing.

4. The developing cartridge according to claim 2, wherein, In the first direction, the ground portion is closer to the first side of the housing than to the second side of the housing; In a third direction that intersects the first direction and the second direction, the ground portion is farther from the rotation axis of the developing roller than the rotation axis of the input gear.

5. The developing cartridge according to claim 2, characterized in that, The chip has a ground contact, and the ground portion can be electrically connected to the ground contact.

6. The developing cartridge according to claim 1, wherein, In the second direction, the power connection portion is farther from the rotation axis of the input gear than the rotation axis of the developing roller.

7. The developing cartridge according to claim 1, wherein, It further comprises a detected protrusion that can move relative to the housing; In the first direction, the detected protrusion is closer to the second side of the housing than to the first side of the housing.

8. The developing cartridge according to claim 1, wherein It further comprises a light-emitting member; In the first direction, the light-emitting member is closer to the second side of the housing than to the first side of the housing.

9. The developing cartridge according to claim 1, wherein In a state where the developing cartridge is mounted to the drum cartridge, the power connection portion can contact a charger inside the drum cartridge.

10. The developing cartridge according to claim 1, wherein, In the second direction, at least a part of the power connection portion is farther from the fourth side of the housing than the developing roller.

11. The developing cartridge according to claim 1, wherein, In the first direction, the maximum distance between the end of the input gear and the power connection portion is L, where 31 mm < L < 41 mm.

12. The developing cartridge according to claim 1, wherein, The power connection portion extends in the first direction, and the length of the power connection portion in the first direction is S, where 2 mm ≤ S ≤ 10 mm.

13. The developing cartridge according to claim 1, characterized in that, The power connection part is movable relative to the housing between a first position and a second position.

14. A developing cartridge, comprising: A housing for accommodating a developer, the housing having a first side and a second side separated from each other in a first direction, and a third side and a fourth side separated from each other 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 located on the third side of the housing in the second direction; An input gear for receiving a driving force from outside the developing cartridge, the input gear rotatable about an input gear axis extending in the first direction, the input gear being located on the first side of the housing in the first direction; A chip having an electrical contact surface, the electrical contact surface being located on the first side of the housing; Characterized in that it further comprises an electrode electrically connected to a component of the developing cartridge; The electrode includes a power connection part, the power connection part being capable of contacting a power supply member outside the developing cartridge; The power connection part is movable relative to the housing between a first position and a second position; In the second direction, the first position is closer to the fourth side of the housing than the second position.

15. The developing cartridge according to claim 14, wherein, It further comprises an elastic member for keeping the power connection part in the first position.

16. The developing cartridge according to claim 14, wherein, In the second direction, the first position of the power connection part is closer to the electrical contact surface than the second position of the power connection part.

17. The developing cartridge according to claim 14, characterized in that, It further comprises a force-receiving part for receiving a force from outside the developing cartridge to drive the electrode to move from the first position to the second position.

18. A developing cartridge, comprising: A housing for accommodating a developer, the housing having a first side and a second side separated from each other in a first direction, and a third side and a fourth side separated from each other 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 located on the third side of the housing in the second direction; An input gear for receiving a driving force from outside the developing cartridge, the input gear rotatable about an input gear axis extending in the first direction, the input gear being located on the first side of the housing in the first direction; A chip having an electrical contact surface, the electrical contact surface being located on the first side of the housing; Characterized in that the developing cartridge further comprises an electrode for receiving electric power from outside the developing cartridge and supplying it to a component of the developing cartridge; The electrode includes a power connection part, a grounding part and a voltage regulating unit, the power connection part being capable of contacting a power supply member outside the developing cartridge, the grounding part being used for contacting a grounding member outside the developing cartridge and / or the negative pole of a power supply; In the first direction, the power connection part is closer to the first side of the housing than the second side of the housing; The power connection part can be electrically connected to the grounding part and the voltage regulating unit; In a state where the grounding portion is electrically connected to a grounding member and / or the negative power supply terminal outside the developing cartridge, the voltage regulating unit is configured to adjust a first voltage applied to the developing cartridge to a second voltage different from the first voltage.

19. The developing cartridge according to claim 18, wherein, The first voltage is greater than the second voltage.

20. The developing cartridge according to claim 18, wherein, It further includes a power supply portion configured to contact and electrically connect to components of the developing cartridge; a first impedance unit electrically connected between the power connection portion and the power supply portion; a second impedance unit electrically connected between the power supply portion and the grounding portion.

21. The developing cartridge according to claim 20, wherein The resistance value of the first impedance unit is R1, and the resistance value of the second impedance unit is R2; wherein, 5 MΩ ≤ R1 = R2 ≤ 10 MΩ.

Images