CN214504130U

CN214504130U - Counting device and developing cartridge

Info

Publication number: CN214504130U
Application number: CN202120727785.8U
Authority: CN
Inventors: 唐良春; 吕金波; 刘洪芳
Original assignee: Zhuhai Yuancheng Digital Technology Co ltd
Current assignee: Zhuhai Yuancheng Digital Technology Co ltd
Priority date: 2021-04-09
Filing date: 2021-04-09
Publication date: 2021-10-26
Anticipated expiration: 2031-04-09

Abstract

The utility model relates to a counting device and a developing box, wherein the counting device is used for interacting with a counted part outside the counting device, and comprises a driven part, a toggle part, a moving part and a first reset part; the driven part is used for being combined with the external driving part to receive the driving force and driving the shifting part to rotate, and the shifting part and the counted part interact in the rotating process of the shifting part; the movable piece and the driven piece are combined with each other, and the driven piece can move along with the movement of the movable piece; first piece and the moving part butt that resets, under the effect of the first piece that resets, the moving part has the trend that drives driven piece and keep away from external drive spare, counting assembly need not unpack the end cover and can realize when needs reset, therefore, counting assembly's the operation that resets is more swift.

Description

Counting device and developing cartridge

Technical Field

The utility model relates to an electrophotographic imaging field especially relates to a detachably installs the developing cartridge in electrophotographic imaging apparatus and is located the counting assembly of developing cartridge.

Background

Laser printer is electrophotographic image forming apparatus commonly used, develop the box and be the consumptive article that a detachably installs in laser printer, laser printer during operation, the carbon dust that holds in the developing box is consumed, for making the user in time obtain the notice of changing the developing box, be provided with counting assembly among the current developing box, it is corresponding, be provided with in the laser printer with the counting assembly matching by the count portion, when developing the box and being installed to laser printer, through counting assembly and the interact by the count portion, the model of developing the box, information such as life-span is other laser printer discernment.

In order to ensure that the quality of the developing box is good, the developing box produced by a factory needs to be subjected to printing test before leaving the factory, after the test is completed, the counting device needs to be reset, when the counting device in the existing developing box is reset, an end cover for protecting the counting device in the developing box needs to be detached, the counting device can be further reset, and the operation mode is too time-consuming to cause low production efficiency.

Meanwhile, the developing box further comprises a driving force input component used for receiving driving force from the laser printer, a developing roller used for conveying carbon powder to the outside, and a powder outlet knife used for adjusting the thickness of the carbon powder layer on the surface of the developing roller, wherein the powder outlet knife is in contact with the outer surface of the developing roller, the driving force input component is arranged at one end of the developing box along the length direction of the developing box, the powder outlet knife and the developing roller are arranged in the length direction, and at the moment when the driving force input component receives the driving force from the laser printer, the driving force can cause the driving force input component to generate vibration, and when the vibration is transmitted to the developing roller and the powder outlet knife, the contact state of the developing roller and the powder outlet knife can be changed, so that the imaging quality of the developing box is influenced.

SUMMERY OF THE UTILITY MODEL

The utility model provides a redesign's counting assembly, after counting assembly accomplished the count, need not unpack apart the end cover and can realize resetting of counting assembly, concrete scheme is as follows:

the counting device is used for interacting with a counted part outside the counting device and comprises a driven part, a toggle part, a movable part and a first reset part; the driven part is used for being combined with the external driving part to receive the driving force and driving the shifting part to rotate, and the shifting part and the counted part interact in the rotating process of the shifting part; the movable piece and the driven piece are combined with each other, and the driven piece can move along with the movement of the movable piece; the first piece and the moving part butt that resets, under the effect of the first piece that resets, the moving part has the trend that drives driven piece and keep away from external drive piece.

In the counting process of the counting device, the first resetting piece deforms, and the moving piece is locked; after the counting device finishes counting, the locking of the moving part is released, and the moving part drives the driven part to be far away from the external driving part under the action of the resetting force of the first resetting part.

The shifting piece and the driven piece are formed in a split mode and are arranged eccentrically.

A part of the movable piece is arranged coaxially with the driven piece.

The movable part comprises a forced pushing part arranged in the movable part, when the counting device is in a state that the driven part is separated from the external driving part, the forced pushing part receives external acting force, the forced pushing force of the first resetting part is overcome, and the movable part drives the driven part to return to the state of being combined with the external driving part.

The utility model relates to a developing box, including the casing, be located the vertical terminal drive arrangement of casing and as above counting assembly, drive arrangement is used for receiving drive power and drive counting assembly work from developing the box outward.

The developing box further comprises an end cover arranged on the same side as the counting device, the end cover comprises a through hole, and a part of the moving piece is exposed through the through hole.

The end cover further comprises a locking piece arranged in the end cover, the movable piece is locked by the locking piece in the counting process of the counting device, and after the counting device finishes counting, the locking piece deforms, and the locking of the movable piece is released.

The utility model relates to a counting assembly need not unpack apart the end cover and can realize when needs reset, therefore, counting assembly's the operation that resets is more swift.

Drawings

Fig. 1 and 2 are perspective views of a developing cartridge according to the present invention.

Fig. 3 is a partially exploded view of the developing cartridge according to the present invention.

Fig. 4 is a perspective view of the counting gear in the developing cartridge according to the present invention.

Fig. 5A and 5B are perspective views of a dial of a counting device in a developing cartridge according to the present invention.

Fig. 6 is a perspective view of a movable member of the counting device in the developing cartridge according to the present invention.

Fig. 7A is a perspective view of the developing cartridge end cap according to the present invention, as viewed from the outside.

Fig. 7B is a perspective view of the developing cartridge end cap according to the present invention as viewed from the inside.

Fig. 8 is a schematic view showing relative positions between the developing roller, the doctor blade and the driving force receiving gear when the developing cartridge according to the present invention is viewed in a direction parallel to the longitudinal direction thereof.

Fig. 9A is a side view of the counting device in the developing cartridge according to the present invention, as viewed from the side of the developing cartridge, when counting is started.

Fig. 9B is a schematic diagram of the relative position of the counting gear and the end cap when the counting device starts counting in the developing cartridge according to the present invention.

Fig. 9C is a side view of the counting device in the developing cartridge according to the present invention, when counting is started, as viewed in the vertical direction of the developing cartridge.

Fig. 10A is a schematic diagram of relative positions of the counting gear, the driving member and the movable member of the counting device when the counting device completes counting in the developing cartridge according to the present invention.

Fig. 10B is a schematic diagram of relative positions of the counting gear, the driving member and the moving member when the counting device of the developing cartridge of the present invention is viewed in the vertical direction of the developing cartridge when counting is completed.

Detailed Description

Embodiments of the present invention will be described with reference to the following drawings, and it should be understood that any modification made to the embodiments of the present invention by those skilled in the art according to the following description should be considered as being within the protection scope of the present invention.

Fig. 1 and 2 are perspective views of a developing cartridge according to the present invention; fig. 3 is a partially exploded view of the developing cartridge according to the present invention.

The developing cartridge 100 may be combined with a drum rack, not shown, to form a process cartridge, and the developing cartridge 100 or the process cartridge is detachably mounted to a laser printer provided with a counted portion. The developing cartridge 100 is mounted in the y direction, and has a length extending in the x direction and a height extending in the z direction, which is a direction from the bottom of the developing cartridge 100 toward the top when the developing cartridge 100 is normally placed, where a direction parallel to the x direction is defined as a longitudinal direction, a direction parallel to the y direction is a lateral direction, and a direction parallel to the z direction is a vertical direction.

The developing cartridge 100 includes a casing 10 containing toner, a developing roller 11 rotatably mounted in the casing 10, a toner discharging blade 14 and a toner feeding roller 15 in contact with the developing roller 11, a driving device 20 and a counting device 30 at the longitudinal ends of the casing, and an end cap 12 disposed on the same side as the counting device 30, the powder feeding roller 15 conveys the carbon powder to the developing roller 11 and supplies the carbon powder to the outside from the developing roller 11, the powder outlet blade 14 is abutted with the outer surface of the developing roller 11, for adjusting the thickness of the carbon powder layer on the outer surface of the developing roller 11, the counting device 30 may be disposed at the same side as the driving device 20, or may be disposed at both longitudinal ends of the casing 10, respectively, regardless of how the counting device and the driving device are distributed, the driving force required for the counting device 30 to operate is supplied by the driving device 20, that is, when the driving device 20 receives a driving force from an external component such as a laser printer, the developing roller 11, the powder feeding roller 15, and the counting device 30 are driven and operated.

As shown in fig. 2, the driving force input member 21 for receiving the driving force in the driving device 20 is exposed from the end cap 12, and at least a portion of the counting device 30 is also exposed from the end cap 12, and specifically, in the y direction, the member for receiving the resetting force in the counting device 30 is exposed from the rear end of the end cap 12, so that the counting device 30 is reset by an operator, or the counting device 30 is reset by a member in a drum rack or a laser printer during the mounting or dismounting of the developing cartridge 100.

As shown in fig. 3, the doctor blade 14 includes a blade holder 141 and a blade 142 that are coupled to each other, wherein the blade holder 141 is fixedly mounted on the housing 10, and the blade abuts against the outer surface of the developing roller 11; the driving device 20 includes a driving force input member 21, a developing roller gear 22, a powder feeding roller gear 23, and at least one intermediate gear 24, the driving force input member 21 includes a driving force receiving portion 211, and a first driving gear 212 and a second driving gear 213 coupled to the driving force receiving portion 211, diameters of the driving force receiving portion 211, the first driving gear 212, and the second driving gear 213 are sequentially increased, the driving force receiving portion 211 receives a driving force from the outside, the first driving gear 212 is engaged with the powder feeding roller gear 23, the second driving gear 213 is engaged with the developing roller gear 22, and when the driving force input member 21 receives the driving force, the developing roller gear 22, the powder feeding roller gear 23, and the at least one intermediate gear 24 are all driven, and thus, the developing roller 11 and the powder feeding roller 15 start to rotate.

The counting device 30 includes a counting gear 31, a toggle member 32, a movable member 33 and a first reset member 34, the counting gear 31 is engaged with the driving gear 24, when the driving gear 24 starts to rotate, the counting gear 31 is driven, it is realized that the driving force of the counting gear 31 can also be the friction generation between a rubber layer provided on the outer surface of the driving gear 24 and the counting gear 31, or both the driving gear 24 and the counting gear 31 are replaced by rubber wheels, thus, the driving gear 24 can be regarded as one of the driving members for driving the counting gear 31 to rotate, and the counting gear 31 can be regarded as one of the driven members; the stirring piece 32 and the counting gear 31 are formed in a split mode and are arranged eccentrically, the stirring piece 32 is stirred by the counting gear 31 at intervals along with the rotation of the counting gear 31, and when the stirring piece 32 is stirred, the stirring piece 32 interacts with a part to be counted in the laser printer, so that the identification of the laser printer on the developing box 100 is completed; a part of the movable element 33 is coaxial with the counting gear 31, under the urging force action of the first resetting element 34, the movable element 33 has a tendency of being away from the driving element 24, or the movable element 33 has a tendency of being disengaged from the driving element 24, after the counting is completed, the counting gear 31 is disengaged from the driving element 24 under the driving of the movable element 33, when the counting device 30 needs to be reset, the urging force overcoming the first resetting element 34 is applied to the movable element 33, and the counting gear 31 returns to the position of being engaged with the driving element 24 under the driving of the movable element 33, in other words, the counting gear 31 in the utility model can move between the position of being engaged with the driving element 24 and the position of being disengaged from the driving element 24 under the driving of the movable element 33.

The first restoring member 34 may generate urging force by using an elastic member or a magnetic member, and preferably, the first restoring member 34 is a torsion spring, one end of which abuts against the housing 10 and the other end of which abuts against the movable member 33; as shown in fig. 3, in order to ensure that the toggle member 32 can stably receive the toggle force from the counter gear 31, the counting device 30 further includes a second reset member 35 coupled to the toggle member 32, wherein the second reset member 35 forces the toggle member 32 to return to a position capable of receiving the toggle force applied by the counter gear 31, and similarly, the second reset member 35 may also be an elastic member or a magnetic member, and preferably, the second reset member 35 is a tension spring, one end of which is coupled to the toggle member 32 and the other end of which is coupled to the end cap 12.

Fig. 4 is a perspective view of a counting gear in the developing cartridge according to the present invention; fig. 5A and 5B are perspective views of a dial of a counting device in a developing cartridge according to the present invention; fig. 6 is a perspective view of a movable member of the counting device in the developing cartridge according to the present invention; fig. 7A is a perspective view of the developing cartridge end cap according to the present invention, viewed from the outside; fig. 7B is a perspective view of the developing cartridge end cap according to the present invention as viewed from the inside.

The counting gear 31 is rotatable around a rotation axis L1 and includes teeth 312 arranged on an outer circumference, at least one toggle protrusion 313 arranged on one surface 311, and an unlocking member 314 rotatable with the counting gear, the teeth 312 are combined with the driving member 24 to receive a driving force, the toggle protrusions 313 are arranged along a circumferential direction of the counting gear 31, the number and shape of the toggle protrusions 313 can be determined according to information amount of the developing cartridge required to be recognized by the laser printer, for example, the laser printer can determine life information of the developing cartridge according to the number of the toggle protrusions 313, or the laser printer can also determine information such as a model number of the developing cartridge according to the length of the toggle protrusions 313 in the circumferential direction of the counting gear 31, when the toggle protrusions 313 are arranged in plural numbers, the plurality of toggle protrusions 313 are arranged at intervals; the unlocking member 314 is used to unlock the movable member 33, which will be described in detail later.

As shown in fig. 4, the counting gear 31 further includes a coupling portion 315 disposed therein, and the coupling portion 315 is configured to couple with a portion of the movable member 33, so that the counting gear 31 can move along with the movement of the movable member 33 after the counting device 30 completes counting. Specifically, the coupling portion 315 is a shaft hole coaxially disposed with the rotation axis L1 and protruding from the surface 311, and accordingly, the movable element 33 is provided with a protruding column 332 (as shown in fig. 6) engaged with the shaft hole, or the protruding column 332 is disposed on the counter gear 31 and the shaft hole is disposed on the movable element 33; the deformable shaft hole or the projecting column 332 may not be provided coaxially with the rotation axis L1, but may be provided in parallel with the rotation axis L1 or inclined with respect thereto on the counter gear 31 as long as the counter gear 31 can move in accordance with the movement of the movable piece 33.

The toggle piece 32 and the counting gear 31 are arranged eccentrically, and when the counting gear 31 rotates, the toggle protrusion 313 toggles the toggle piece 32 to rotate, so that the toggle piece 32 interacts with the counted part; compare in the structure that present stirring piece 32 and count gear 31 were arranged with one heart, the utility model provides a stirring piece 32 not only with count gear 31 components of a whole that can function independently setting, the two is relative off-centre still, consequently, developing box manufacturer can be according to laser printer in by the position difference of count portion, change stirring piece 32 and count gear 31 the relative position can, and needn't redesign count gear 31 again, be favorable to reducing developing box manufacturer's manufacturing cost.

The stirring piece 32 comprises a base portion 321 capable of rotating around a rotation axis L2, a middle portion 322 protruding outwards from the base portion 321, a stirring block 323 and a force-bearing portion 324, wherein the force-bearing portion 324 abuts against the stirring protrusion 313 on the counting gear 31, when the counting gear 31 rotates, the stirring protrusion 313 pushes the force-bearing portion 324 to cause the stirring piece 32 to rotate around the rotation axis L2, meanwhile, the stirring block 323 interacts with the counted portion, the stirring block 323 and the force-bearing portion 324 are respectively located on two sides of the middle portion 322 along the rotation axis L2, during the rotation of the stirring piece 32, the interaction between the stirring block 323 and the counted portion and the interaction between the force-bearing portion 324 and the stirring protrusion 313 can be unaffected, and the complexity of the developing box can be reduced.

The movable member 33 includes a main body 331, and a rotating portion 333 and a coupled portion (protruding column) 332 disposed on the main body 331, and under the urging action of the first restoring member 34 or when overcoming the urging force of the first restoring member 34, the movable member 33 can rotate around the rotation axis L3 through the rotating portion 333, as described above, preferably, the protruding column 332 is disposed coaxially with the counting gear 31, that is, the rotation axis L1 passes through the protruding column 332, at this time, the rotation axis L1 and the rotation axis L3 are parallel to each other, and the movable member 33 moves in a plane perpendicular to the rotation axis L1. As shown in fig. 6, the movable element 33 further includes a positioning portion 334, a locked portion 336 and a forced pushing portion 337 arranged on the main body 331, preferably, the positioning portion 334, the locked portion 336 and the forced pushing portion 337 are all integrally formed with the main body 331, one end of the first resetting member 34 is received by the positioning portion 334, and the locked portion 336 is used for being combined with an external locking member to prevent the movable element 33 from rotating around the rotation axis L3 under the forced pushing of the first resetting member 34, so that the combining portion 315 of the protruding column 332 and the counting gear 31 is kept relatively stationary, at which time, the counting gear 31 is kept combined with the driving member 24; when the counting device 30 needs to be reset, the forced pushing portion 337 receives a force from the outside, overcomes the urging force applied by the first resetting member 34 to the movable member 33, and causes the movable member 33 to rotate about the rotation axis L3, thereby bringing the counting gear 31 back to the position of engagement with the driving member 24 through the protruding column 332.

It is realized that the locked portion 336 and the forced pushing portion 337 are formed separately from the main body 331, in this case, the locked portion 336 and the main body 331 and the forced pushing portion 337 and the main body 331 are connected by the connecting member, and when the locked portion 336 is locked by the external locking member, the main body 331 is also locked, and when the external force is applied to the forced pushing portion 337, the main body 331 is also rotatable about the rotation axis L3.

The end cap 12 includes an end cap body 120, a first through hole 121, a second through hole 122 and a third through hole 125, the first through hole 121 is disposed on the end cap body 120, the first through hole 121 is substantially opened along the y direction and faces the rear end of the developing cartridge mounting direction, the specific shape of the first through hole 121 is not limited, that is, the first through hole 121 may be circular or polygonal, the second through hole 122 and the third through hole 125 extend along the x direction, the counting device 30 is exposed through the second through hole 122, and the driving force receiving portion 211 is exposed through the third through hole 125; as shown in fig. 7A and 7B, the end cap 12 further includes a cover 123 disposed opposite to the second through hole 122 and a plurality of positioning posts 124/127/128/129 protruding from the cover 123 or the end cap body 120 toward the housing, the counting gear 31 is opposite to the positioning posts 124, but the positioning portions 127 do not limit the movement of the counting gear 31, the movable member 33 is supported and positioned by the positioning posts 127, the toggle member 32 is supported and positioned by the positioning posts 129, and one end of the second reset member 35 is connected to the positioning posts 128.

Further, the end cap 12 further includes a locking member 126 disposed adjacent to the second through hole 122, that is, the locking member 126 of the present invention is disposed on the end cap 12, of course, the locking member 126 can also be disposed on the housing 10, and the description will be given by taking the locking member 126 disposed on the end cap 12 as an example.

Preferably, the locking member 126 is formed as a part of the end cover body 120, and the locking member 126 is deformable with respect to the end cover body 120, as shown in fig. 7B, a side of the locking member 126 facing the housing 10 is provided with an unlocking protrusion 1261 and a stopper 1262, a locking portion 1263 is formed between the locking protrusion 1261 and the stopper 1262, the locking portion 1263 is formed as a locking groove, and when the locked portion 336 enters the locking groove 1263, the movable member 33 is locked so as not to be forcibly moved by the first restoring member 34.

As described above, when the developing cartridge 100 is in operation, the driving force receiving portion 211 needs to receive driving force from the laser printer and drive the powder feed roller gear 23 and the developing roller gear 22 to rotate via the first driving gear 212 and the second driving gear 213, respectively. The holder 141 of the powder discharging blade includes a first portion 141a and a second portion 141b bent oppositely, preferably, a bent portion 141c having an included angle of 90 ° is formed between the first portion 141a and the second portion 141b, the blade 142 is fixed on the second portion 141b, when the powder discharging blade 14 is fixed on the housing 10, the first portion 141a and the second portion 141b are mutually limited, and the powder discharging blade 14 is ensured to be stably mounted on the housing 10.

The driving force input member 21 is coupled to the housing 10 through the bracket 13, and during the process of receiving the driving force from the outside by the driving force receiving portion 211, the process of transmitting the driving force between the first driving gear 212 and the powder feeding roller gear 23, and the process of transmitting the driving force between the second driving gear 213 and the developing roller gear 22, vibration is generated between the two coupled components, especially at the moment when the driving force receiving portion 211 receives the driving force, the whole driving force input member 21 generates large vibration, and when the vibration is transmitted to the powder discharging blade 14 and the developing roller 11 through the housing 10, the abutting state between the powder discharging blade 14 and the developing roller 11 may be changed.

To reduce the influence of the vibration transmission on the relative position between the powder discharging blade 14 and the developing roller 11, as shown in fig. 8, at least the driving force receiving portion 211 does not overlap with the powder discharging blade 14 when viewed in the developing cartridge x direction, the vibration transmitted to the powder discharging blade 14 and the developing roller 11 may be reduced at the moment when the driving force is received by the driving force receiving portion 211, or at least the driving force receiving portion 211 does not overlap with at least one of the bent portion 141c and the blade 142, so that even if the vibration is transmitted to the powder discharging blade 14, the vibration can affect only the first blade holder portion 141a and not the second blade holder portion 141b and the blade 142 mounted on the second blade holder portion 141 b.

As shown in fig. 8, the developing roller 11 and the blade 142 are both located in front of the driving force receiving portion 211 in the mounting direction y of the developing cartridge, or the developing roller 11 and the blade 142 are both located outside the circumferential range of the driving force receiving portion 211, and the first blade holder portion 141a is located above the driving force receiving portion 211 in the vertical direction z, so that the outer diameter of the developing roller 11 can be reduced and the material cost of the developing roller 11 can be reduced while reducing the influence of vibration on the relative position between the powder discharging blade 14 and the developing roller 11, and also in the case that the size of the developing cartridge 100 in the mounting direction is determined.

Further, the first drive gear 212 does not overlap with at least one of the bent portion 141c, the blade holder second portion 141b, and the blade 142 when viewed in the longitudinal direction of the developing cartridge 100, and thus, the influence of vibration generated when the driving force is transmitted between the first drive gear 212 and the powder feed roller gear 23 on the blade 142 is reduced.

Fig. 9A is a side view of the counting device in the developing cartridge according to the present invention, as viewed from the side of the developing cartridge, at the time of starting counting; fig. 9B is a schematic diagram of the relative position of the counting gear and the end cap when the counting device starts counting in the developing cartridge according to the present invention; fig. 9C is a side view of the counting device in the developing cartridge according to the present invention, when counting is started, as viewed in the vertical direction of the developing cartridge.

As shown in fig. 3, the developing cartridge 100 further includes a stopper plate 10b provided on the longitudinal end surface 10a of the casing 10, the stopper plate 10b serving to restrict the movement range of the counter gear 31 after counting is completed; as shown in fig. 4, the unlocking piece 314 is formed to protrude from the counter gear surface 311, and the unlocking piece 314 has a front end 314a and a rear end 314b in the rotational direction r2 of the counter gear 31, and the rear end 314b protrudes farther than the front end 314a with respect to the surface 311, thereby forming a slope 314c between the front end 314a and the rear end 314 b.

The end cap 12 is hidden in FIG. 9A to more clearly show the status of the various components of the counting assembly 30. As shown in the drawing, when the developing cartridge 100 is mounted to the laser printer along with the drum rack, the counter gear 31 may be in a coupled state with the driving member 24, or in an uncoupled state in which the counter gear 31 and the driving member 24 are separated from each other, the forced pushing portion 337 may receive a force applied from an operator or a component of the drum rack or the laser printer (e.g., a door cover, an inner wall, etc.) and further move the counter gear 31 through the movable member 33, so that the counter gear 31 reaches a position coupled with the driving member 24, at this time, the rear end 314b of the unlocking member 314 abuts against the unlocking protrusion 1261, possible reverse rotation of the counter gear 31 is prevented, and the locked portion 336 enters the locking recess 1263, even if the first returning member 34 applies a forced pushing force to the movable member 33, the movable member 33 does not move, accordingly, the counter gear 31 does not move.

The driving force input member 21 starts to rotate in the direction indicated by r1 after receiving the driving force, the driving force is transmitted to the counter gear 31 through the driving member 24, the counter gear 31 starts to rotate in the direction indicated by r2 around the rotation axis L1, when the toggle protrusion 313 toggles the force-receiving portion 324, the toggle member 32 starts to rotate in the direction indicated by r3 around the rotation axis L2, during the process that one toggle protrusion 313 toggles the force-receiving portion 324, the second reset member 35 deforms, the toggle block 323 interacts with the counted portion in the laser printer until the toggle protrusion 313 is disengaged from the force-receiving portion 324, and then under the reset force of the second reset member 35, the toggle member 32 rotates in the direction opposite to the direction indicated by r3 around the rotation axis L2, so that the force-receiving portion 324 is engaged with the next toggle protrusion 313, and the above process is repeated.

Fig. 10A is a schematic diagram illustrating relative positions of a counting gear, a driving member and a movable member of the counting device when the counting device completes counting in the developing cartridge according to the present invention; fig. 10B is a schematic diagram of relative positions of the counting gear, the driving member and the moving member when the counting device of the developing cartridge of the present invention is viewed in the vertical direction of the developing cartridge when counting is completed.

When the counting device 30 is about to complete counting, the front end 314a of the unlocking member reaches a position adjacent to the unlocking protrusion 1261, the unlocking protrusion 1261 has a slope corresponding to the slope 314c, the slope 314c is gradually abutted against the slope of the unlocking protrusion 1261, as the counting gear 31 continues to rotate, the unlocking member 314 deforms the locking member 126 by pushing the unlocking protrusion 1261, specifically, the locking member 126 deforms in a direction away from the housing 10, the locked portion 336 is disengaged from the locking groove 1263, the first reset member 34 releases the pushing force, and the movable member 33 starts to rotate around the rotation axis L3 in a direction shown by r 4; meanwhile, under the action of the combining portion 315 and the combined portion 332, the counting gear 31 is rotated together by the movable member 33 around the rotation axis L3 in the direction indicated by r4, as shown in fig. 10B, the counting gear 31 is disengaged from the driving member 24, a gap a is formed between the counting gear 31 and the driving member 24, the driving force of the driving member 24 cannot be transmitted to the counting gear 31, at this time, the counting gear 31 remains stationary, and the forced pushing portion 337 is moved to the outside of the first through hole 121, or the forced pushing portion 337 is exposed through the first through hole 121.

When the counting device 30 needs to be reset, as described above, the forced pushing portion 337 is pushed by an operator or a drum rack or a component in the laser printer through the first through hole 121 to overcome the urging force of the first resetting member 34 on the movable member 33, so that the movable member 33 rotates around the rotation axis L3 in the direction opposite to the direction indicated by r4, and at the same time, the counting gear 31 is driven by the movable member 33 through the action of the engaging portion 315 and the engaged portion 332 to rotate around the rotation axis L3 in the direction opposite to the direction indicated by r4, as shown in fig. 9C, the counting gear 31 returns to the position engaged with the driving member 24.

The utility model relates to a counting assembly 30 need not unpack apart end cover 12 when needs reset, only need apply the effort to compelled portion 337 of moving part 33 by the part in operating personnel or the drum frame or the laser printer, overcome the compel thrust of first piece 34 that resets, force moving part 33 drive count gear 31 towards be close to driving piece 24 rotate can, this mode of operation is more swift.

Claims

1. The counting device is used for interacting with a counted part outside the counting device and comprises a driven part, a toggle part, a movable part and a first reset part;

the driven part is used for being combined with the external driving part to receive the driving force and driving the shifting part to rotate, and the shifting part and the counted part interact in the rotating process of the shifting part;

the movable piece and the driven piece are combined with each other, and the driven piece can move along with the movement of the movable piece;

its characterized in that, first piece and the moving part butt that resets, under the effect of first piece that resets, the moving part has the trend that drives driven piece and keep away from external drive piece.

2. The counting device of claim 1, wherein during the counting process, the first reset member is deformed, and the movable member is locked; after the counting device finishes counting, the locking of the moving part is released, and the moving part drives the driven part to be far away from the external driving part under the action of the resetting force of the first resetting part.

3. The counting device of claim 1, wherein the toggle member is formed separately from the driven member and is eccentrically disposed.

4. The counting device of claim 1, wherein a portion of the movable member is disposed coaxially with the driven member.

5. The counting device of claim 1, wherein the movable member includes a forced pushing portion disposed therein, and when the counting device is in a state in which the driven member is disengaged from the external driving member, the forced pushing portion receives an external force, and the movable member drives the driven member to return to the state in which the driven member is engaged with the external driving member against the forced pushing force of the first returning member.

6. The counting device is used for interacting with a counted part outside the counting device and comprises a driven part, a stirring part and a movable part;

the driven member is movable between a position where it is coupled to the external driving member and a position where it is decoupled from the external driving member by the movable member.

7. Counting device according to one of claims 1-6, wherein the moving direction of the movable element lies in a plane perpendicular to the axis of rotation of the driven element.

8. A developing cartridge, comprising a casing, a driving means at a longitudinal end of the casing, and a counting means according to any one of claims 1 to 7, wherein the driving means is adapted to receive a driving force from outside the developing cartridge and drive the counting means to operate.

9. The developing cartridge according to claim 8, further comprising an end cap provided on the same side as the counting device, the end cap including a through hole through which a part of the movable member is exposed.

10. The developing cartridge according to claim 9, wherein the end cap further includes a locking member provided therein, the movable member is locked by the locking member during counting by the counting device, and the locking member is deformed and the locking of the movable member is released after the counting by the counting device is completed.