A developing cartridge

Abstract

The present invention relates to a developing cartridge, which includes a housing, a transmission assembly and a counting mechanism provided at an end of the developing cartridge. The transmission assembly receives a driving force from an image forming apparatus and drives the counting mechanism to operate. The transmission assembly includes a power receiving portion. The counting mechanism includes a counting lever, a horizontal push rod and a first actuating protrusion. The counting lever is used to trigger a detection mechanism in the image forming apparatus and is rotatably mounted on the developing cartridge. The horizontal push rod moves horizontally under the action of an elastic force to push the counting lever to rotate. The first actuating protrusion is used to trigger the horizontal push rod so that the horizontal push rod moves horizontally under the action of an elastic force, and is disposed on the transmission assembly and thus rotates under the drive of the transmission assembly. Compared with the prior art, the developing cartridge of the present invention has a simpler implementation manner and structure and lower manufacturing difficulty while meeting the detection timing requirements of the image forming apparatus.

Description

Technical Field

[0001] The present invention relates to a developing cartridge. In particular, it relates to a developing cartridge that is detachably mounted to a laser image forming apparatus. Background Art

[0002] A developing cartridge is an essential printing consumable in a laser image forming apparatus. After the laser image forming apparatus has been operating for a period of time, the toner filled in the developing cartridge will be exhausted, and at this time, a new developing cartridge needs to be replaced.

[0003] For some models of developing cartridges, manufacturers usually provide a counting mechanism on the developing cartridge. This counting mechanism can be used in cooperation with a detection mechanism (sensor) on the image forming apparatus to indicate to the image forming apparatus whether the developing cartridge has been installed or to identify the specifications of the developing cartridge. For example, a developing cartridge with a detection function in the prior art typically includes a detection gear and a protrusion. When the detection gear rotates, the protrusion moves. The developing cartridge is installed in the image forming device, and the image forming device includes a sensor for detecting the protrusion when the developing cartridge is installed. In the case where the image forming device determines the specifications of the developing cartridge by detecting the protrusion, for developing cartridges with different specifications, the layout pattern of the protrusions is different. In this way, the image forming device can identify the specifications of the developing cartridge from multiple different specifications.

[0004] Chinese Patent No. 201710395723.X discloses a developing cartridge, as Figures 1 - 3 shown. The developing cartridge includes a housing 11, a second agitator gear 100 (a first rotating member), and a detection gear 200 (a second rotating member). The detection gear 200 includes a second gear portion 220, a second rib 230, a fourth gear portion 240, a first spring engagement portion 251, a second spring engagement portion 252, and a third spring engagement portion 253. The fourth gear portion 240 includes at least one gear tooth 241. The fourth gear portion 240 is capable of rotating together with the second gear portion 220 and the second rib 230. The fourth gear portion 240 is separated from the second gear portion 220 in the rotation direction of the detection gear 200. The pitch circle diameter 240A of the fourth gear portion 240 is smaller than the pitch circle diameter 220A of the second gear portion 220. Since the pitch circle diameter 130A of the third gear portion 130 is larger than the pitch circle diameter 110A of the first gear portion 110 and the pitch circle diameter 240A of the fourth gear portion 240 is smaller than the pitch circle diameter 220A of the second gear portion 220, when the second gear portion 220 is engaged with the first gear portion 110, the detection gear 200 rotates at a slower speed, and when the fourth gear portion 240 is engaged with the third gear portion 130, the detection gear 200 rotates at a faster speed. The detection gear 200 includes a first protrusion 261, a second protrusion 262, a third protrusion 263, and a fourth protrusion 270.

[0005] In the above developing cartridge, a plurality of protrusions 261-263 and a fourth gear portion 240 provided on the detection gear 200 are detected, and the contact lever 7A is touched at different timings or the contact lever 7A is touched at different speeds, so as to send detection signals with different characteristics to the sensor in the image forming apparatus, and the controller of the image forming apparatus determines the model of the developing cartridge according to the characteristics of different detection signals.

[0006] In order to touch the contact lever 7A at different speeds, the above detection gear requires precise cooperation of multiple components to achieve, resulting in a complex structure of the developing cartridge, especially the detection gear, a large processing and manufacturing difficulty of the developing cartridge, and a low product yield. SUMMARY OF THE INVENTION

[0007] An object of the present invention is to provide a developing cartridge, which has a simpler implementation method and structure and lower processing and manufacturing difficulty while meeting the detection timing requirements of the image forming apparatus.

[0008] To achieve the above object, the developing cartridge of the present invention includes a housing, a transmission assembly and a counting mechanism provided at the end of the developing cartridge. The transmission assembly receives a driving force from the image forming apparatus and drives the counting mechanism to work. The transmission assembly includes a power receiving portion. The counting mechanism includes a counting lever, a horizontal push rod and a first actuating protrusion. The counting lever is used to trigger a detection mechanism in the image forming apparatus and is rotatably mounted on the developing cartridge. The horizontal push rod moves horizontally under the action of an elastic force to push the counting lever to rotate. The first actuating protrusion is used to trigger the horizontal push rod so that the horizontal push rod moves horizontally under the action of an elastic force, and is provided on the transmission assembly and thus rotates under the drive of the transmission assembly.

[0009] Compared with the prior art, by providing a plurality of gear components on the detection gear to change the transmission ratio of the gear and thus change the rotation speed of the detection gear, the counting mechanism of the developing cartridge of the present invention directly pushes the counting lever to move by a horizontal push rod, and the horizontal push rod quickly rotates the counting lever under the action of an elastic force, thereby realizing the switching of the speed of the counting lever. The developing cartridge of the present invention has a simpler implementation method and structure and lower processing and manufacturing difficulty while meeting the detection timing requirements of the image forming apparatus.

[0010] In one embodiment, the counting lever includes a rotating shaft and a first lever portion and a second lever portion provided on both sides of the rotating shaft; the first lever portion is pushed by the horizontal push rod to force the counting lever to rotate, and the second lever portion is used to trigger a detection mechanism in the image forming apparatus.

[0011] In one embodiment, the rotating shaft is a transmission rod extending parallel to the developing roller of the developing box, the transmission rod includes a first end close to the power receiving part and a second end away from the power receiving part, the first lever part is installed at the first end of the transmission rod, and the second lever part is installed at the second end of the transmission rod. This structure of the counting lever can be applied to the developing box whose driving end and the detection mechanism are respectively located on both sides of the printer.

[0012] In one embodiment, the developing box further includes an end cover, and the transmission assembly is disposed between the shell and the end cover.

[0013] In one embodiment, the counting mechanism further comprises a spring for applying elastic force to the horizontal push rod and a locking groove provided on the inner side of the end cover, one end of the spring is mounted on the end cover, and the other end is mounted on the horizontal push rod. At least a portion of the horizontal push rod extends into the locking groove to lock the horizontal push rod in an initial state of being subjected to the elastic force.

[0014] In one embodiment, the horizontal push rod further includes a reset push block, and the end cover is provided with an elongated through hole, and the reset push block passes through the elongated through hole and is at least partially located outside the end cover. By providing the reset push block, the developer cartridge can be reset, and the developer cartridge can continue to be used after being taken out of the printer for maintenance through the reset mechanism.

[0015] In one embodiment, the counting mechanism further includes a second actuating protrusion, which is used to drive the counting lever to rotate so as to trigger the detection mechanism, and is disposed on the transmission assembly so as to rotate under the drive of the transmission assembly. For the detection timing of a specific model of printer, the second actuating protrusion sequentially pushes the counting lever at different timings so as to send different detection timings to the printer.

[0016] In one embodiment, the transmission assembly includes a stirring frame gear, and a first actuating protrusion and a second actuating protrusion are arranged on the end face of the stirring frame gear; and the first actuating protrusion and the second actuating protrusion are arranged so that when the stirring frame gear rotates, the timing when the second actuating protrusion touches the counting lever is earlier than the timing when the first actuating protrusion touches the horizontal push rod. Specifically, along the axial direction of the stirring frame gear, the second actuating protrusion is closer to the counting lever than the first actuating protrusion; and along the radial direction of the stirring frame gear, the first actuating protrusion is closer to the horizontal push rod than the second actuating protrusion. Through this special arrangement, the first actuating protrusion and the second actuating protrusion can control the movement of the counting lever and the horizontal push rod respectively.

[0017] In one embodiment, the counting mechanism further comprises a torsion spring, and the torsion spring is used for restoring the counting lever to an initial position after being rotated. Brief Description of the Drawings

[0018] Figure 1 is an exploded view of an existing technology developing cartridge.

[0019] Figure 2 is Figure 1 a different angle view of the counting gear of the developing cartridge shown.

[0020] Figure 3 is Figure 1 a schematic diagram of a partial working state of the counting mechanism of the developing cartridge shown.

[0021] Figure 4 is a perspective view of the developing cartridge of the present invention according to the first embodiment.

[0022] Figure 5 is Figure 4 a perspective view of the developing cartridge shown after removing the end cap.

[0023] Figure 6 is Figure 4 a perspective view of the developing cartridge shown after removing the housing and the rotatable member.

[0024] Figure 7 is Figure 6 an exploded view of the end cap and the counting mechanism shown.

[0025] Figure 8 is Figure 6 a perspective view of the counting lever of the counting mechanism of the developing cartridge shown.

[0026] Figure 9a and 9b is Figure 7 a perspective view of different perspectives of the horizontal push rod of the counting mechanism of the developing cartridge shown.

[0027] Figure 10a is Figure 6 an inner view of the end cap of the developing cartridge shown.

[0028] Figure 10b is a partial enlarged view of the outside of the end cap after the horizontal push rod and the end cap are assembled.

[0029] Figure 11 is an assembly drawing of the horizontal push rod and the counting lever of the counting mechanism.

[0030] Figure 12 is Figure 7 a perspective view of the agitating rack gear shown.

[0031] Figures 13a - 13d is a schematic diagram of different working states of the counting mechanism of the developing cartridge of the present invention according to the first embodiment.

[0032] Figure 14 It is an assembly drawing of the counting mechanism and the end cap of the developing cartridge of the present invention according to the second embodiment.

[0033] Figure 15 is Figure 14 A perspective view of the counting lever of the counting mechanism of the developing cartridge shown.

[0034] Figure 16 is Figure 14 An assembly drawing of the counting mechanism of the developing cartridge shown. Specific embodiments

[0035] In the following, through specific embodiments and with reference to the drawings, the structure and other aspects of the developing cartridge of the present invention will be further described in detail.

[0036] Figure 4 and Figure 5 is a perspective view of the developing cartridge of the present invention according to the first embodiment. The developing cartridge of the present invention includes a housing 1, a transmission assembly 2, a rotatable member (not shown), and an end cap 3. The housing 1 includes side walls 11 on both sides and a cavity formed inside for accommodating the rotatable member or toner (developer). The rotatable member includes, for example, a developing roller, a powder feeding roller, or a stirring frame, etc. The two ends of the rotatable member are rotatably mounted on the two side walls 11 of the housing 1. The transmission assembly 2 is mounted at one end of the housing 1 and is located between the side wall 11 of the housing and the end cap 3. The transmission assembly 2 is used to drive the rotatable members such as the developing roller, the powder feeding roller, or the stirring frame to rotate. The transmission assembly 2 generally includes a driving force input gear 20, a developing roller gear 21, an intermediate gear 22, and a stirring frame gear 23, etc. The driving force input gear 20 is coaxially arranged with the power receiving port 201. The developing roller gear 22 and the stirring frame gear 23 are respectively coaxially mounted with the developing roller and the stirring frame to drive the developing roller and the stirring frame to rotate respectively. According to the different models of the developing cartridge, the gear system of the transmission assembly can be adjusted or arranged according to actual needs.

[0037] The developing cartridge of the present invention can be detachably installed in a printer (image forming apparatus) and cooperate with other structures in the printer to form an image on paper (printing medium).

[0038] Such as Figure 6 and Figure 7As shown, the developer box of the present invention also includes a counting mechanism 4, which is used to trigger the detection mechanism in the printer to send a corresponding indication signal to the printer. The counting mechanism 4 further includes a counting lever 41, a horizontal push rod 42 and a first actuating protrusion 43. Among them, the counting lever 41 is used to trigger the detection mechanism in the printer and is rotatably mounted on the developer box. The horizontal push rod 42 can move horizontally under the action of elastic force to push the counting lever 41 to rotate quickly. The first actuating protrusion 43 is used to trigger the horizontal push rod 42 so that the horizontal push rod 42 moves horizontally under the action of elastic force, thereby pushing the counting lever 41 to rotate. The first actuating protrusion 43 is arranged on the transmission assembly 2 so as to rotate under the drive of the transmission assembly 2.

[0039] In a certain model of printer, the driving force output end and the detection mechanism of the printer are located on both sides of the printer. In order to adapt to this model of printer, such as Figure 8 As shown, the counting lever 41 includes a transmission lever 411, a first lever portion 412 and a second lever portion 413 located on both sides of the transmission lever 411 along the axial direction of the transmission lever 411, and the transmission lever 411 is parallel to the developing roller and is arranged inside the housing 1. The transmission lever 411 further includes a first end 411a and a second end 411b, the first lever portion 412 is installed at the first end 411a of the transmission lever, and the second lever portion 413 is installed at the second end 411b. The first lever portion 412 is pushed by the horizontal push rod 42 when the counting mechanism 4 is working, thereby forcing the counting lever 41 to rotate, and the second lever portion 413 is used to touch the detection mechanism in the printer.

[0040] In this embodiment, the counting lever 41 further includes a third lever portion 414, and the third lever portion 414 and the first lever portion 412 are both located at the first end 411a of the transmission lever 411. When the horizontal push rod 42 moves, it pushes the third lever portion 414 to force the counting lever 41 to rotate.

[0041] like Figure 9a As shown, in one embodiment, the horizontal push rod 42 includes a push rod body 421, a reset push block 422 disposed on the push rod body 421, and a first protrusion 423 for pushing the counting lever 41 to rotate. Figure 10a and Figure 10b As shown, correspondingly, an elongated through hole 31 is provided on the end cover 3, and the reset push block 422 is at least partially located on the outside of the end cover 3 after passing through the elongated through hole 31. The user can reset the counting mechanism 4 by toggling the reset push block 422, which will be described in detail below.

[0042] In a preferred embodiment, Figure 8 and Figure 11As shown, an opening 414a is provided on the third lever portion 414. When the horizontal push rod 42 moves, the first protrusion 423 extends into the opening 414a to push the counting lever 41 to rotate.

[0043] In a specific embodiment, as Figure 6 and Figure 11 shown, the counting mechanism 4 further includes a spring 44. The spring 44 is used to apply an elastic force to the horizontal push rod 42 to force the horizontal push rod 42 to move horizontally. One end of the spring 44 is fixed to the end cap 3, and the other end is connected to the horizontal push rod 42. In this embodiment, the spring 44 is a compression spring. Additionally, as Figure 10a shown, a locking groove 32 is provided on the inner side of the end cap 3. At least a part of the horizontal push rod 42 extends into the locking groove 32 to lock the horizontal push rod 42 in the initial state under the elastic force. More specifically, as Figure 9b shown, the horizontal push rod 42 has a second protrusion 425. The second protrusion 425 extends into the locking groove 32 to lock the horizontal push rod 42 in the initial state under the elastic force.

[0044] In one implementation manner, as Figure 12 shown, the first actuating protrusion 43 is provided on the end face of the stirring frame gear 23. The counting mechanism 4 further includes at least one second actuating protrusion 46. The second actuating protrusion 46 is used to toggle the counting lever 41 to rotate the counting lever 41, thereby triggering the detection mechanism in the printer. The second actuating protrusion 46 is also provided on the end face of the stirring frame gear 23. In this embodiment, the first actuating protrusion 43 and the second actuating protrusion 46 are arranged such that when the stirring frame gear 23 rotates from the initial position, the timing of the second actuating protrusion 46 touching the counting lever 41 is earlier than the timing of the first actuating protrusion 43 touching the horizontal push rod 42. To achieve this purpose, along the axial direction of the stirring frame gear 23, the height that the first actuating protrusion 43 extends is less than the height that the second actuating protrusion 46 extends. As Figure 11 shown, since in the longitudinal direction of the developing cartridge, the horizontal push rod 42 and the first lever portion 412 of the counting lever 41 are not in the same plane, and there is a certain distance between them after assembly. That is, along the axial direction of the stirring frame gear 23, the second actuating protrusion 46 is closer to the counting lever 41 than the first actuating protrusion 43. At the same time, in the radial direction of the stirring frame gear 23, the first actuating protrusion 43 is closer to the horizontal push rod 42 than the second actuating protrusion 46. In this way, when the stirring frame gear 23 rotates, the first actuating protrusion 43 will only touch the horizontal push rod 42 and will not touch the counting lever 41, while the second actuating protrusion 46 will only touch the counting lever 41 and will not touch the horizontal push rod 42. Through this special setting method, the first actuating protrusion 43 and the second actuating protrusion 46 respectively control the movements of the counting lever 41 and the horizontal push rod 42.

[0045] In this embodiment, there are three second actuating protrusions 46, which are circumferentially distributed along the stirring frame gear 23. The shape, number, and distribution position of the second actuating protrusions 46 on the end face of the stirring frame gear 23 depend on the detection timing preset in the printer (i.e., the characteristics of the signal). In other words, for different models of developing cartridges, second actuating protrusions 46 with different shapes, numbers, and distributions need to be selected.

[0046] As Figure 7 shown, in a specific implementation, a torsion spring 47 is provided on the counting lever 41. After the second actuating protrusion 46 toggles the counting lever 41 to rotate, the counting lever 41 can return to its initial position under the action of the torsion spring 47. The multiple second actuating protrusions 46 and the horizontal push rod 42 sequentially toggle the counting lever 41 to rotate, and the counting lever 41 then touches the detection mechanism of the printer at different timings, thus realizing the counting function of the developing cartridge, that is, the printer identifies features such as the model of the developing cartridge through this counting method.

[0047] The working process of the counting mechanism of the developing cartridge of the present invention will be described in detail below.

[0048] When the developing cartridge of the present invention is in the initial state (i.e., the factory state), the second protrusion 425 of the horizontal push rod 42 extends into the locking groove 32 of the end cap 3, thereby locking the horizontal push rod 42 in the initial state under the elastic force, and the spring 44 is in a compressed state. At the same time, the first protrusion 423 of the horizontal push rod 42 is away from the opening 414a of the third lever 414.

[0049] As Figure 13a shown, in the initial state, the first actuating protrusion 43 does not contact the horizontal push rod 42. When the developing cartridge is loaded into the printer and the driving device of the printer outputs a driving force to the transmission assembly 2 of the developing cartridge, the stirring frame gear 23 starts to rotate (in the direction shown by the arrow X) driven by the intermediate gear 22. After the stirring frame gear 23 starts to rotate, first, the second actuating protrusion 46 touches the first lever part 412 of the counting lever 41, and then drives the counting lever 41 to rotate (in the direction shown by the arrow Y). In this embodiment, there are three second actuating protrusions 46, and when the stirring frame gear 23 rotates, the three second actuating protrusions 46 sequentially touch the first lever part 412 of the counting lever 41. After each second actuating protrusion 46 passes through the first lever part 412, the counting lever 41 resets under the action of the torsion spring 47, as Figure 13b shown by the arrow Y' in

[0050] When the stirring frame gear 23 continues to rotate until the first actuating protrusion 43 starts to contact the horizontal push rod 42, as Figure 13cIn a preferred embodiment, in order to accurately control the position where the first actuating protrusion 43 contacts the horizontal push rod 42, a tongue 428 is provided on the lower side of the horizontal push rod 42. When the first actuating protrusion 43 rotates to the tongue 428, it starts to push the horizontal push rod 42. The first actuating protrusion 43 applies an upward thrust to the horizontal push rod 42, causing the horizontal push rod 42 to rotate around the end in contact with the spring 44, as shown in FIG. Figure 13c After the horizontal push rod 42 rotates around the end in contact with the spring 44, the second protrusion 425 on the horizontal push rod 42 disengages from the locking groove 32 on the end cover 3, and then the horizontal push rod 42 moves horizontally under the elastic force of the spring 44 until the reset push block 422 on the horizontal push rod 42 moves to the end of the long strip through hole 31 of the end cover 3 and is restricted from further movement, as shown in FIG. Figure 13d When the horizontal push rod 42 moves horizontally, the first protrusion 423 on the horizontal push rod 42 extends into the opening 414a of the counting lever 41 to push the counting lever 41 to rotate. Figure 13d The direction indicated by the middle arrow Y. When the horizontal push rod 42 pushes the counting lever 41 to rotate, the horizontal push rod 42 can push the counting lever 41 to rotate at a faster speed because the elastic force of the spring 44 is released faster.

[0051] When the horizontal push rod 42 moves to the end, the stirring frame gear 23 continues to rotate in a cycle, and the first actuating protrusion 43 and the second actuating protrusion 46 will no longer touch the counting lever 41 or the horizontal push rod 42. In this way, the counting function of the developing box is completed.

[0052] After the developer cartridge has been used for a period of time, it is necessary to remove the developer cartridge from the printer for maintenance. After the maintenance is completed, the user moves the reset push block 422 of the horizontal push rod 42 to restore the horizontal push rod 42 to the initial state under the elastic force, that is, the second protrusion 425 on the horizontal push rod 42 re-enters the locking groove 32 of the end cover 3. At the same time, the stirring frame gear 23 is restored to the original state through the D-shaped calibration hole. Figure 13a The initial position shown in FIG. This completes the reset process of the developer cartridge.

[0053] like Figures 14 - 16As shown, for some other specific models of printers, the driving force output end of the printer and the detection mechanism are located on the same side of the printer. In order to adapt to this type of printer, according to the second embodiment, the counting lever 41' of the counting mechanism 4 of the developer box of the present invention has a different structure from the counting lever 41 in the first embodiment. The counting lever 41' includes a rotating shaft 411', a first lever portion 412' and a second lever portion 413' located on both sides of the rotating shaft 411'. The first lever portion 412' is moved by the second actuating protrusion 46, and the second lever portion 413' is pushed by the horizontal push rod 42. At least a portion of the second lever portion 413' is exposed to the outside of the end cover 3 through the through hole 35 on the end cover 3. The portion of the second lever portion 413' exposed to the outside of the end cover 3 is used to trigger the detection mechanism on the printer when the developer box is working.

[0054] like Figure 16 As shown, the horizontal push rod 42 pushes the second lever portion 413' of the counting lever 41' through the extension portion 429, thereby pushing the counting lever 41' to rotate. In the second embodiment, the counting lever omits the transfer rod, and the other structures or working methods of the counting mechanism of the developing box are basically the same as those of the first embodiment, and the contents of the same parts are not repeated herein.

[0055] In the second embodiment, a tension spring 47 ′ may be used to replace the torsion spring 47 in the first embodiment to cooperate with the counting lever 41 ′ to achieve elastic resetting of the counting lever.

[0056] Compared with the prior art, the developing box of the present invention has a simpler structure and lower processing and manufacturing difficulty while meeting the detection timing requirements of the image forming device.

[0057] The above embodiments are only used to illustrate the concept and scope of the present invention, and are not used to limit the protection scope of the present invention. Modifications, equivalent substitutions and other improvements to the above embodiments that are obvious to those skilled in the art are also within the concept of the present invention. The protection scope and concept of the present invention are specifically defined by the claims.

Claims

1. A developing cartridge, comprising a housing, and a transmission assembly and a counting mechanism provided at an end of the developing cartridge, the transmission assembly receiving a driving force from an image forming apparatus and driving the counting mechanism to operate, the transmission assembly including a power receiving portion, characterized in that, The counting mechanism comprises: A counting lever, used for triggering a detection mechanism in the image forming device, and rotatably mounted on the developing box; A horizontal push rod, which moves horizontally under the action of elastic force to push the counting lever to rotate; and A first actuating protrusion is used to trigger the horizontal push rod to make the horizontal push rod move horizontally under the action of elastic force; wherein the first actuating protrusion is arranged on the transmission assembly so as to rotate under the drive of the transmission assembly; The developing box further comprises an end cover, and the transmission assembly is arranged between the housing and the end cover; The counting mechanism also includes: A spring for applying elastic force to the horizontal push rod, one end of the spring being mounted on the end cover and the other end being mounted on the horizontal push rod; and A locking groove is arranged on the inner side of the end cover, and at least a part of the horizontal push rod extends into the locking groove so as to lock the horizontal push rod in an initial state under elastic force.

2. The developing cartridge according to claim 1, wherein The counting lever comprises a rotating shaft and a first lever part and a second lever part arranged on both sides of the rotating shaft; wherein the first lever part is pushed by the horizontal push rod to force the counting lever to rotate, and the second lever part is used to trigger the detection mechanism in the image forming device.

3. The developing cartridge according to claim 2, wherein, The rotating shaft is a transfer rod extending parallel to the developing roller of the developing box, and the transfer rod includes a first end close to the power receiving part and a second end away from the power receiving part. The first lever part is installed at the first end of the transfer rod, and the second lever part is installed at the second end of the transfer rod.

4. The developing cartridge according to claim 1, wherein The horizontal push rod also includes a reset push block. The end cover is provided with an elongated through hole. After the reset push block passes through the elongated through hole, at least a part of it is located outside the end cover.

5. The developing cartridge according to claim 1, wherein, The counting mechanism further comprises a second actuating protrusion, which is used to drive the counting lever to rotate so as to trigger the detection mechanism, and is arranged on the transmission assembly so as to rotate under the drive of the transmission assembly.

6. The developing cartridge according to claim 5, wherein, The transmission assembly includes a stirring frame gear, the first actuating protrusion and the second actuating protrusion are arranged on the end surface of the stirring frame gear; and the first actuating protrusion and the second actuating protrusion are arranged as follows: When the stirring frame gear rotates, the timing at which the second actuating protrusion touches the counting lever is earlier than the timing at which the first actuating protrusion touches the horizontal push rod.

7. The developing cartridge according to claim 6, wherein Along the axial direction of the stirring frame gear, the second actuating protrusion is closer to the counting lever than the first actuating protrusion; and along the radial direction of the stirring frame gear, the first actuating protrusion is closer to the horizontal push rod than the second actuating protrusion.

8. The developing cartridge according to claim 5, characterized in that, The counting mechanism further comprises a torsion spring, and the torsion spring is used for restoring the counting lever to an initial position after being rotated.

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