CN218003924U - Developing box - Google Patents

Abstract

The utility model relates to a developing box which can be detachably installed in an imaging device provided with a counted piece, the developing box comprises a shell, an end cover combined with the shell, and a driving force receiving piece and a counting component which are positioned at the longitudinal end of the shell, the driving force receiving piece component is used for receiving driving force from the imaging device; the counting assembly comprises a counting tooth and a movable piece, and the counting tooth comprises a shifting portion for driving the movable piece to move; the end cover comprises an end cover body and a through hole arranged on the end cover body, and at least the shifting part is exposed from the through hole; the end cap further includes a restraint disposed therein; the counting teeth also comprise abutting parts arranged on the gear body, before counting is started, the abutting parts are close to one limiting surface of the limiting parts, and after counting is finished, the abutting parts are close to the other limiting surface of the limiting parts; when the abutting portion crosses the limiting portion from the other limiting surface to the one limiting surface, the counting teeth are reset; the reset mode of count tooth is simple, also need not dismantle the end cover, is favorable to promoting user's use and experiences.

Description

Developing box

Technical Field

The utility model relates to an electrophotographic imaging field especially relates to a detachably installs the development box in imaging device.

Background

The developing box is detachably mounted on the imaging device, and is used for accommodating a container of a developer, so that the model of the developing box is ensured, the service life is prolonged, information such as manufacturers is known by the imaging device, the existing developing box is internally provided with a counting piece which can be preset by the imaging device and interacts with the counting piece, before the developing box starts to work in the imaging device, the imaging device obtains the information of the developing box through sensing the interaction times of the counting piece and the counted piece, the interval duration and other parameters, after the counting is completed, the developing box works, and the counting piece is kept static.

In recent years, in order to reduce the cost of image formation, a method of refilling a developing cartridge with new developer and reusing the developing cartridge is becoming popular, however, before the developing cartridge filled with new developer is mounted to an image forming apparatus again, it is necessary to detach the end cap of the developing cartridge and reset the counter, and for most end users, the reset operation of the existing developing cartridge is too complicated to be completed.

Although the automatic resetting device solves the problem that the developing box cannot be reset by a terminal user, in the working process of the developing box, if faults such as paper jam occur, the developing box needs to be taken out, when the developing box is installed again, the counting piece is automatically reset, the developing box at the moment is considered to be a new developing box by the imaging equipment, however, the service life of the developing box is likely to be about to end, and therefore the imaging equipment can obtain wrong developing box information.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model provides a developing box wherein no longer sets up can make the device that the counting part can automatic re-setting, and simultaneously, the reset operation of counting part is simplified to promote end user's use and experience.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a developing cartridge detachably mounted in an image forming apparatus provided with a counted member, the developing cartridge including a housing, an end cap coupled to the housing, and a driving force receiver and a counting assembly at a longitudinal end of the housing, the driving force receiver assembly for receiving a driving force from the image forming apparatus; the counting assembly comprises counting teeth and a moving part, the counting teeth comprise a gear body, a tooth part arranged along the circumferential direction of the gear body and a poking part arranged on the gear body, the tooth part is used for receiving driving force from the driving force receiving part, and the poking part is used for driving the moving part to move so that the moving part and the counted part interact with each other; the end cover comprises an end cover body and a through hole arranged on the end cover body, and at least the shifting part is exposed from the through hole; the end cap further comprises an elastic arm and a limiting part arranged in the end cap, and the limiting part protrudes from the elastic arm into the through hole; the counting teeth also comprise abutting parts arranged on the gear body, before counting is started, the abutting parts are close to one limiting surface of the limiting parts, and after counting is finished, the abutting parts are close to the other limiting surface of the limiting parts; when the abutting portion passes over the restriction portion from the other restriction surface to the one restriction surface, the count tooth is reset.

The counting assembly further comprises a fixing piece for limiting the movement of at least the toggle part along the direction of the rotating axis of the counting teeth.

In some embodiments, the abutting part is a limiting protrusion arranged on the gear body, and the limiting protrusion and the shifting part are arranged at intervals along the circumferential direction of the gear body.

In other embodiments, the abutment is a toggle.

Preferably, the movable part comprises a rod body and a shifted part which are combined with each other, and when the shifted part is shifted by the shifting part, the shifted part drives the rod body to interact with the counted part; the developing box also comprises an elastic piece contacted with the poked part, and the elastic piece is used for providing resetting force for the movable piece.

Preferably, the end cap further comprises an extension extending from the end cap body in a direction away from the housing, the resilient arm being disposed in the extension.

In order to keep the counting teeth in a static state after the counting is finished, the counting teeth further comprise tooth missing parts arranged along the circumferential direction of the gear body, the developing box further comprises a driving gear arranged adjacent to the counting teeth, the driving gear is meshed with the tooth parts during counting, and the driving gear is opposite to the tooth missing parts when the counting is finished.

Further, for making the count tooth have the time delay function, tooth portion includes first tooth portion and the second tooth portion of following the circumferencial direction interval arrangement of gear body, it includes first scarce tooth portion and the second scarce tooth portion of following the circumferencial direction interval arrangement of gear body to lack the tooth portion, along the circumferencial direction of gear body, first tooth portion, first lack tooth portion, second tooth portion and second lack tooth portion arrange in proper order, before the count, drive gear and second tooth portion mesh, in the counting process, drive gear is relative with first scarce tooth portion and first tooth portion in proper order, when the count is accomplished, drive gear is relative with second lack tooth portion.

Furthermore, the counting teeth further comprise stress parts, the driving gear is provided with force application parts, and after the driving gear is opposite to the first tooth-lacking part, the force application parts are abutted to the stress parts, so that the driving gear is meshed with the first tooth part.

As described above, in the present embodiment, when the counting teeth are reset, only the urging force for continuing the rotation in the starting rotation direction needs to be applied to the counting teeth so that the abutting portion passes over the restricting portion.

Drawings

Fig. 1 is a perspective view of a developing cartridge according to an embodiment of the present invention.

Fig. 2 is a partially exploded view of a counting end of a developing cartridge according to an embodiment of the present invention.

Fig. 3 is a perspective view of an end cap of a counting end in a developing cartridge according to an embodiment of the present invention.

Fig. 4A is a side view of the developing cartridge according to the first embodiment of the present invention, when viewed in the direction of the rotation axis of the power receiving member, before the counting of the counting assembly is started.

Fig. 4B is a state diagram of the relative position between the counting teeth and the driving teeth before the counting assembly starts counting in the developing cartridge according to the first embodiment of the present invention.

Fig. 5A is a side view of the developing cartridge according to the first embodiment of the present invention, when the counting assembly completes counting, as viewed in the direction of the rotation axis of the power receiving member.

Fig. 5B is a state diagram of the relative position between the counting teeth and the driving teeth when the counting assembly completes counting in the developing cartridge according to the first embodiment of the present invention.

Fig. 6A is a perspective view of a counting assembly according to a second embodiment of the present invention.

Fig. 6B is a perspective view of an end cap of a counting end in a developing cartridge according to a second embodiment of the present invention.

Fig. 7A is a side view of the counting assembly in the developing cartridge according to the second embodiment of the present invention, when viewed in the direction of the rotation axis of the power receiving member, before the counting assembly starts counting.

Fig. 7B is a state diagram of the relative position between the counting teeth and the driving teeth before the counting assembly starts counting in the developing cartridge according to the second embodiment of the present invention.

Fig. 8 is a state diagram of the relative position between the counting teeth and the driving teeth when the counting assembly is about to be driven again after a delay in the counting process in the developing cartridge according to the second embodiment of the present invention.

Fig. 9A is a side view of the counting assembly in the developing cartridge according to the second embodiment of the present invention, as viewed in the direction of the rotation axis of the power receiving member, at the time of the intermediate state of the counting process.

Fig. 9B is a state diagram of the relative position between the counting teeth and the driving teeth when the counting assembly is in the intermediate state of the counting process in the developing cartridge according to the second embodiment of the present invention.

Fig. 10A is a side view of the developing cartridge according to the second embodiment of the present invention, when the counting assembly completes counting, as viewed in the direction of the rotation axis of the power receiving member.

Fig. 10B is a state diagram of the relative position between the counting teeth and the driving teeth when the counting assembly completes counting in the developing cartridge according to the second embodiment of the present invention.

Detailed Description

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

Example one

Fig. 1 is a perspective view of a developing cartridge according to an embodiment of the present invention; fig. 2 is a partially exploded view of a counting end of a developing cartridge according to an embodiment of the present invention; fig. 3 is a perspective view of an end cap of a counting end in a developing cartridge according to an embodiment of the present invention.

The developing cartridge 100 can be mounted to the image forming apparatus in the mounting direction a and can be removed in the direction opposite to the mounting direction a, and the developing cartridge 100 can be mounted to the image forming apparatus as a separate product or can be combined with an external member called a drum assembly, and then the combined whole is mounted to the image forming apparatus.

As shown in fig. 1, the developing cartridge 100 includes a casing 1 accommodating a developer, a developing roller 2 rotatably mounted in the casing 1, a driving force receiving member 4 at a longitudinal end of the casing 1, the longitudinal direction being perpendicular to a rotation axis L, and a counting assembly 5, the driving force receiving member 4 receiving a driving force from the image forming apparatus rotating about the rotation axis L to drive the developing roller 2 and the counting assembly 5 to operate, wherein the counting assembly 5 may be located at the same longitudinal end of the casing 1 as the driving force receiving member 4 or at both longitudinal ends of the casing 1, respectively, and the driving force received by the driving force receiving member 4 may be transmitted to the counting assembly 5 through a transmission mechanism such as a gear, a link, or the like, regardless of the arrangement of the counting assembly 5 and the driving force receiving member 4 in the developing cartridge 100.

The following description will be given taking as an example the case where the driving force receiving member 4 and the counter assembly 5 are located at the same longitudinal end of the case 1.

As shown in the drawing, the developing cartridge 100 further includes an end cap 3 disposed on the same side as the driving force receiver 4/the counter assembly 5, and as shown in fig. 2, the end cap 3 includes an end cap body 30, a first through hole 31 and a second through hole 32 provided on the end cap body 30, the driving force receiver 4 is exposed from the first through hole 32, and the counter assembly 5 is exposed through the second through hole 32; further, the developing cartridge 100 further includes an extending portion 321 extending from the end cap body 30 in a direction away from the casing 1 in a circumferential direction of the second through hole 32, an elastic arm 322 provided in the extending portion 321, and a restricting portion 324 coupled to the elastic arm 322, the restricting portion 324 protruding radially inward from the elastic arm 322 within the second through hole 32, the restricting portion 324 moving inward of the through hole 32 without being pressed when the developing cartridge 100 is mounted, and the restricting portion 324 being elastically deformable radially outward with the elastic arm 322 with respect to the extending portion 321 when the restricting portion 324 is subjected to a radially outward force.

The extending portion 321 has a distal end surface 3211 away from the end cover 30, and a portion of the extending portion 321 is between the elastic arm 322 and the distal end surface 3211 along a rotation axis L5 (described below), the portion extending as the distal end portion 325. Preferably, the elastic arm 322 is integrally formed with the extending portion 321, and at this time, the elastic arm 322 is cut from the extending portion 321, and along the rotation axis L5, the elastic arm 322 can be protected by the distal end portion 325.

Before the counting assembly 5 starts to count, the counting member 51 can be restricted by the restricting portion 324 so as not to be reversed, and when the counting assembly 5 finishes counting, the counting member 51 is restricted by the restricting portion 324 again and is kept still, as shown in fig. 3, the restricting portion 324 includes a first restricting surface 3241 and a second restricting surface 3242 which are adjacently arranged along the circumferential direction of the second through hole 32, the first restricting surface 3241 is used for acting when the counting assembly 5 finishes counting, and the second restricting surface 3242 is used for acting before the counting assembly 5 starts counting.

The counting assembly 5 comprises a counting element 51 and a movable element 52, wherein during the counting process of the counting assembly 5, the movable element 52 is driven by the counting element 51 to interact with a counted element in the image forming device, and when the counting assembly 5 finishes counting, the counting element 51 and the movable element 52 are not contacted any more or keep contacted continuously according to the requirements of the image forming device.

In some embodiments, the counting member 51 is a counting tooth including a gear body 511, a tooth portion 512 and a tooth-missing portion 513 arranged in a circumferential direction of the gear body 511, and a dial portion 514 and a stopper protrusion (one embodiment of an abutting portion) 515 provided on the gear body 511, at least the dial portion 514 is exposed through the second through hole 32, the stopper protrusion 515 and the dial portion 514 are provided at intervals in the circumferential direction of the gear body 511, the counting tooth 51 rotates about a rotation axis L5 parallel to the rotation axis L when the counting tooth 51 is driven by the drive gear 41 provided adjacent thereto, in other embodiments, the rotation axis L5 may also be provided perpendicular to or intersecting the rotation axis L, and the counting member 51 may also be a member that does not include the gear body 511; further, the counting assembly 5 further comprises a fixing member 53 for fixing the counting member 51, preferably, the fixing member 53 is a screw, and the screw 53 is used for fixing the counting member 51 along the rotation axis direction thereof, i.e. the counting member 51 cannot move along the rotation axis L5 thereof but can only rotate around the rotation axis L5 under the action of the screw 53.

The movable member 52 can be shifted by the shifting portion 514 to interact with the counted member, and therefore, the structure of the movable member 52 can have a variety of changes, for example, the movable member 52 is a combination of the rod 521 and the shifted portion 522 as shown in fig. 2, when the shifted portion 522 is shifted by the shifting portion 514, the shifted portion 522 drives the rod 521 to move, so as to realize the interaction between the rod 521 and the counted member, or the movable member 52 is a rotating body capable of rotating around an axis, wherein the shifted portion and an action portion for interacting with the counted member are also provided, when the shifted portion 514 is shifted, the movable member 52 rotates, so that the action portion interacts with the counted member.

In contrast, the operation portion provided as the lever 521 is simpler in structure, and is more advantageous for controlling the size of the developing cartridge 100, and the lever 521 is taken as an example of the operation portion to be described below.

For this purpose, as shown in fig. 2 and 3, the developing cartridge 100 further includes a guide groove 323 disposed adjacent to the second through hole 32, the rod 521 passes through the guide groove 323, and the rod 521 may be disposed such that the moving direction of the rod 521 is substantially parallel to or intersects with the mounting direction a under the guiding action of the guide groove 323 according to the position of the counted object relative to the rod 521, which is not limited herein.

Fig. 4A is a side view of the counting assembly of the developing cartridge according to the first embodiment of the present invention, as viewed along the rotation axis direction of the power receiving member, before the counting assembly starts counting; fig. 4B is a state diagram of relative positions between the counting teeth and the driving teeth before the counting assembly starts counting in the developing cartridge according to the first embodiment of the present invention; fig. 5A is a side view of the counting assembly of the developing cartridge according to the first embodiment of the present invention, when the counting assembly is counted, viewed along the rotation axis direction of the power receiving member; fig. 5B is a state diagram of the relative position between the counting teeth and the driving teeth when the counting assembly completes counting in the developing cartridge according to the first embodiment of the present invention.

As shown in fig. 4A and 4B, before the counting assembly 5 starts counting, the tooth portion 512 is engaged with the driving gear 41, the limit protrusion 515 is close to the second limit surface 3242, and even if the driving gear 41 is reversely rotated due to accidental shaking/vibration of the developing cartridge, the possible reverse rotation of the counting teeth 51 can be stopped by the second limit surface 3242, when the driving force receiving member 4 receives the driving force, the driving gear 41 is driven, and accordingly, the counting teeth 51 are driven along the rotation direction r, at this time, the dialed portion 522 of the movable member 52 is located on the rotation path of the counting gear 51, more specifically, the dialed portion 522 is located on the rotation path of the dialing portion 514, and as the counting teeth 51 rotate, the dialing portion 514 gradually approaches the dialed portion 522 and pushes the dialed portion 522 to drive the lever 521 to move substantially along the installation direction a, so that the lever 521 interacts with the counted pieces in the image forming apparatus.

When toggle 514 and by toggle 522 out of contact, according to imaging device's demand, the body of rod 521 resets or keeps and by the state of counted piece interact, when body of rod 521 needs to reset, the power of resetting of the body of rod 521 can come from the elastic force that produces after taking place elastic deformation with the elastic component that is contacted by toggle 522 or by the produced elastic force of toggle 522 self deformation, especially when body of rod 521 and counted piece need interact many times just can accomplish the count, the utility model relates to a moving part 52 homoenergetic is effectively accomplished.

When the counting assembly 5 finishes counting, as shown in fig. 5A and 5B, the tooth-missing part 513 is opposite to the driving gear 41, at this time, the counting teeth 51 are no longer driven and remain stationary, the limit protrusion 515 is close to the first limit surface 3241, and the position of the counting teeth 51 is effectively maintained.

After the developing cartridge 100 is filled with new developer, the counting member 51 needs to be reset, and at this time, the operator or the end user only needs to push the toggle portion 514 continuously in the rotation direction r, so that the limiting protrusion 515 presses the limiting portion 324, the limiting portion 324 brings the elastic arm 322 to elastically deform in a direction (outside the second through hole 32) away from the rotation axis L5, the limiting protrusion 515 goes over the limiting portion 324, and thus, the limiting protrusion 515 returns to a position close to the second limiting surface 3242 to be reset, and under the elastic action of the elastic arm 322, the limiting portion 324 resets, that is, the limiting portion 324 moves from the position away from the rotation axis L5 to a position close to the rotation axis L5.

As described above, when the counter 51 in this embodiment needs to be reset, the end cover 3 does not need to be disassembled, and an operator or an end user applies an acting force to the toggle portion 514 through the second through hole 32 by hand or tool to move the toggle portion along the rotation direction r until the limiting protrusion 515 passes over the limiting portion 324.

Example two

The same components as those in the first embodiment will be given the same reference numerals, and unlike the first embodiment, the restricting portion 324 provided in the end cap 3 directly abuts against the dial portion (another embodiment of the abutting portion) 514 to restrict the rotational movement of the counter piece 51 without providing the restricting protrusion 515 to the counter piece 51.

Still taking the counting member 51 as an example of a counting tooth, as shown in fig. 6A, the counting tooth 51 includes a gear body 511, a tooth portion 512 and a tooth-missing portion 513 arranged along the circumferential direction of the gear body 511, and a toggle portion 514 disposed on the gear body 511, in this embodiment, the counting assembly 5 needs to be delayed in the counting process, in order to implement the delay function, the tooth portion 512 of the counting tooth 51 includes a first tooth portion 5121 and a second tooth portion 5122 arranged at intervals along the circumferential direction of the gear body 511, and correspondingly, the tooth-missing portion 513 is also configured as a first tooth-missing portion 5131 and a second tooth-missing portion 5232 arranged along the circumferential direction of the gear body 511, wherein the number of teeth of the first tooth portion 5121 is greater than that of the second tooth portion 5122, and the specific numbers of the first tooth portion 5131 and the second tooth portion 5122 can be set according to specific counting requirements.

Further, in order to enable the counting teeth 51 to continue counting after the time delay is completed, the counting teeth 51 further include a force receiving portion 516 disposed on the gear body 511, and the function of the force receiving portion 516 will be described below; as shown in fig. 6B, the end cap 3 in this embodiment is also provided with an elastic arm 322 and a limiting portion 324 connected to each other, preferably, the elastic arm 322 is integrally formed with the extending portion 321, alternatively, the elastic arm 322 may be formed separately from the extending portion 321, and the elastic arm 322 and the extending portion 321 are combined by an adhesive or an adapter member, as long as the elastic arm 322 is not affected to be elastically deformed relative to the end cap body 30; further, along the rotation axis L5, there is no tip portion between the elastic arm 322 and the tip end surface 3211, and at this time, the tip end surface 3211 becomes a part of the elastic arm 322, that is, along the rotation axis L5, the elastic arm 322 is located on the side of the extending portion 321 farthest from the housing 1/the end cover body 321, and in this structure, along the rotation axis L5, although the elastic arm 322 is directly exposed to the outside of the end cover 3, it is helpful to accelerate the reset operation of the counting teeth 51.

Fig. 7A is a side view of the counting assembly of the developing cartridge according to the second embodiment of the present invention, as viewed along the rotation axis direction of the power receiving member, before the counting assembly starts counting; fig. 7B is a state diagram of the relative position between the counting teeth and the driving teeth before the counting assembly starts counting in the developing cartridge according to the second embodiment of the present invention; fig. 8 is a state diagram of relative positions between the counting teeth and the driving teeth when the counting assembly in the developing cartridge according to the second embodiment of the present invention is about to be driven again after a delay in the counting process;

fig. 9A is a side view of the counting assembly in the developing cartridge according to the second embodiment of the present invention, as viewed in the direction of the rotation axis of the power receiving member, at the time of the intermediate state of the counting process; fig. 9B is a state diagram of relative positions between the counting teeth and the driving teeth when the counting assembly in the developing cartridge according to the second embodiment of the present invention is in the intermediate state of the counting process; fig. 10A is a side view of the developing cartridge according to the second embodiment of the present invention, when the counting assembly completes counting, as viewed in the direction of the rotation axis of the power receiving member; fig. 10B is a state diagram of the relative position between the counting teeth and the driving teeth when the counting assembly completes counting in the developing cartridge according to the second embodiment of the present invention.

Similarly, the limiting portion 324 of the present embodiment still has the first limiting surface 3241 and the second limiting surface 3242, as shown in fig. 7A and 7B, before the counting assembly starts to count, the second tooth portion 5122 is engaged with the driving gear 41, and the toggle portion 514 and the second limiting surface 3242 are close to each other, compared with the first embodiment, the counting teeth 51 of the present embodiment are more easily affected by the driving gear 41, however, the position of the counting teeth 51 can be accurately maintained under the limitation of the second limiting surface 3242.

When the drive gear 41 starts rotating upon receiving the driving force from the driving force receiving member 4, the counting teeth 51 are driven to rotate by the first angle, and then the first missing tooth portion 5131 opposes the drive gear 41, as described in fig. 8, the counting teeth 51 are no longer driven and remain stationary, and as the drive gear 41 continues rotating, the urging portion 411 moving along with the drive gear 41 starts abutting against the force receiving portion 516, and thus the counting teeth 51 are plucked and continue rotating in the rotation direction r, whereby it is known that the counting teeth 51 are in a stationary state until the urging portion 411 abuts against the force receiving portion 516 after the second tooth portion 5122 is disengaged from the drive gear 41, and thus, the time delay function of the counting teeth 51 is realized. It can be understood that the position of the force receiving portion 516 on the gear body 511 is not necessarily limited, as long as the force receiving portion 516 can be abutted against the force applying portion 411, the time length, the number of times and other parameters of the abutment of the force applying portion 411 against the force receiving portion 516 can be determined according to the delay requirement of the counting tooth 51, for example, when the delay time required by the counting tooth 51 is longer, the arc length of the first tooth-lacking portion 5131 can be set to be larger, at least after the force applying portion 411 is abutted against the force receiving portion 516 once, the first tooth-lacking portion 5131 is still opposite to the driving gear 41, when the delay time required by the counting tooth 51 is shorter, the force applying portion 411 can be set to be farther away from the position where the driving gear 41 is meshed with the second tooth portion 5122 along the rotation direction of the driving gear 41, so that the force applying portion 411 can be abutted against the force receiving portion 516 earlier.

After the first tooth portion 5121 is meshed with the driving gear 41, as shown in fig. 9A and 9B, as the driving gear 41 continues to rotate, the toggle portion 514 gradually approaches the toggled portion 522, and the lever 521 is driven to move in a direction substantially parallel to the installation direction a by pushing the toggle portion 522, so that the lever 521 interacts with the counted object; as shown in fig. 10A and 10B, when the second tooth-missing portion 5132 is opposite to the driving gear 41, the counting assembly 5 finishes counting, the counting teeth 51 are not driven by the driving gear 41 which continues to rotate and are kept still, at this time, the toggle portion 514 reaches a position close to the first limiting surface 3241, and the slight rotation of the counting teeth 51 caused by the vibration can be effectively prevented under the limitation of the first limiting surface 3241. In this embodiment, the angle through which the counter gear 51 rotates in the process from the start of meshing of the first tooth portion 5121 with the drive gear 41 to the facing of the second tooth-missing portion 5132 with the drive gear 41 is referred to as a second angle, which is larger than the first angle.

After the developing cartridge 100 is filled with new developer, the counting member 51 needs to be reset, and similarly, an operator or an end user only needs to apply a force to the toggle portion 514 along the rotation direction r to enable the toggle portion 514 to cross the limiting portion 324, after the reset, the second tooth portion 5122 of the counting tooth 51 is engaged with the driving gear 41 again, and in the process, the elastic arm 322 drives the limiting portion 324 to move in a direction (a direction radially outward of the second through hole 32) away from the rotation axis L5, and after the toggle portion 514 crosses the limiting portion 324, the elastic arm 322 drives the limiting portion 324 to reset.

Like the first embodiment, when the counting tooth 51 in this embodiment needs to be reset, the end cover 3 does not need to be disassembled, and the counting tooth 51 only needs to be pushed to rotate continuously along the rotation direction r until the toggle portion 514 and the second limiting surface 3242 are close to each other, further, the elastic arm 322 in this embodiment is directly exposed outside the end cover 3, and when the resistance of the limiting portion 324 to the toggle portion 514 is large, an operator or an end user can manually press the limiting portion 324 to enable the toggle portion 514 to quickly get over the limiting portion 324.

Based on the above-mentioned concept, the abutting portion 515/514 is provided in the counting tooth 51 so as to be close to the restricting portion 324, the abutting portion and the second restricting surface 3242 are close to each other before the counting is started, the inversion of the counting tooth is prevented, and the initial position of the counting tooth 51 is indicated, and after the counting is completed, the abutting portion and the first restricting surface 3241 are close to each other so as to prevent the counting tooth from continuing to rotate, and when the counting tooth needs to be returned, it is only necessary to apply an urging force to the counting tooth 51 so that the counting tooth 51 continues to rotate in the rotational direction r until the abutting portion reaches the position close to the second restricting surface 3242 again, and therefore, in the case where the delay time is not taken into consideration, the structure of the counting tooth and the structure of the restricting portion in the first embodiment, and the structure of the counting tooth and the structure of the restricting portion in the second embodiment can be exchanged; the above embodiment describes the case where the counting teeth 51 are integrally formed, however, it can also be realized by those skilled in the art that the counting teeth 51 are formed separately, in which case the tooth portion for receiving the driving force from the driving gear 41 is provided separately from the dial portion 514, the tooth portion and the dial portion 514 are engaged with each other during counting, and the tooth portion and the dial portion 514 are disengaged when counting is completed, in which case the dial portion 514 remains stationary even though the counting teeth 51 continues to rotate without providing a missing tooth portion, and in which case the fixing member 53 is only used to restrict the movement of the dial portion 514 along the rotation axis L5; it is realized that the position of the elastic arm 322 can be arbitrarily set in the end cover 3 as long as it is ensured that the limiting portion connected with the elastic arm 322 can limit the abutting portion, and in some embodiments, the extending portion 321 may not be necessary.

Claims (10)

1. A developing cartridge detachably mounted in an image forming apparatus provided with a counted member, the developing cartridge including a housing, an end cap coupled to the housing, and a driving force receiver and a counting assembly at a longitudinal end of the housing, the driving force receiver assembly for receiving a driving force from the image forming apparatus;

the counting assembly comprises a counting tooth and a moving part, the counting tooth comprises a gear body, a tooth part arranged along the circumferential direction of the gear body and a poking part arranged on the gear body, the tooth part is used for receiving the driving force from the driving force receiving part, and the poking part is used for driving the moving part to move so that the moving part and the counted part interact;

the end cover comprises an end cover body and a through hole arranged on the end cover body, and at least the shifting part is exposed from the through hole;

it is characterized in that the preparation method is characterized in that,

the end cap further comprises an elastic arm and a limiting part arranged in the end cap, and the limiting part protrudes from the elastic arm into the through hole;

the counting teeth also comprise abutting parts arranged on the gear body, before counting is started, the abutting parts are close to one limiting surface of the limiting parts, and after counting is finished, the abutting parts are close to the other limiting surface of the limiting parts;

when the abutting portion crosses the restriction portion from the other restriction surface to the one restriction surface, the count tooth is reset.

2. A developing cartridge according to claim 1, wherein the counting assembly further includes a fixing member which restricts movement of at least the dial portion in a direction of a rotational axis of the counting teeth.

3. A developing cartridge according to claim 2, wherein the abutting portion is a stopper projection provided on the gear body, the stopper projection and the stirring portion being provided at an interval in a circumferential direction of the gear body.

4. A developing cartridge according to claim 2, wherein the abutting portion is a toggle portion.

5. A developing cartridge according to claim 1, wherein the movable member includes a lever body and a shifted portion which are combined with each other, and when the shifted portion is shifted by the shifting portion, the shifted portion drives the lever body to interact with the counted member.

6. A developing cartridge according to claim 5, further comprising an elastic member contacting the pushed portion.

7. A developing cartridge according to claim 1, wherein the end cap further includes an extension portion extending from the end cap body in a direction away from the casing, the elastic arm being provided in the extension portion.

8. A developing cartridge according to any one of claims 1 to 7, wherein the count teeth further include tooth-missing portions arranged in a circumferential direction of the gear body, the developing cartridge further includes a drive gear provided adjacent to the count teeth, the drive gear meshes with the tooth portions at the time of counting, and the drive gear opposes the tooth-missing portions at the time of completion of counting.

9. The developing cartridge according to claim 8, wherein the tooth portions include a first tooth portion and a second tooth portion which are arranged at an interval in a circumferential direction of the gear body, the missing tooth portions include a first missing tooth portion and a second missing tooth portion which are arranged at an interval in the circumferential direction of the gear body, the first tooth portion, the first missing tooth portion, the second tooth portion and the second missing tooth portion are arranged in sequence in the circumferential direction of the gear body, the driving gear is meshed with the second tooth portion before counting, the driving gear is opposed to the first missing tooth portion and the first tooth portion in sequence during counting, and the driving gear is opposed to the second missing tooth portion when counting is completed.

10. A developing cartridge according to claim 9, wherein the count teeth further include a force receiving portion, the drive gear is provided with a force applying portion, and the force applying portion abuts against the force receiving portion after the drive gear is opposed to the first missing tooth portion, so that the drive gear is meshed with the first tooth portion.

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