CN108021005B

CN108021005B - Developing cartridge and process cartridge having the same

Info

Publication number: CN108021005B
Application number: CN201810032878.1A
Authority: CN
Inventors: 蒲宏礼
Original assignee: Zhongshan Kingway Image Tech Co ltd
Current assignee: Zhongshan Kingway Image Tech Co ltd
Priority date: 2018-01-13
Filing date: 2018-01-13
Publication date: 2020-04-24
Anticipated expiration: 2038-01-13
Also published as: CN108021005A

Abstract

The invention relates to a developing box, which comprises a shell, a driving end cover, a counting assembly and a power receiving part, wherein the driving end cover and the counting assembly are arranged at one longitudinal tail end of the shell; the sliding part is movably arranged in the positioning part; the counting teeth are used for receiving the driving force transmitted by the power receiving part; the first elastic piece is arranged between the counting teeth and the shell, and the second elastic piece is arranged between the sliding piece and the positioning piece; the poking piece is rotatably arranged on the shell and keeps contact with the sliding piece, the counting device in the developing box is realized by a mechanical mechanism, and an elastic friction layer is not arranged on the rotating piece any more, so that the counting work of the developing box can be smoothly completed.

Description

Developing cartridge and process cartridge having the same

Technical Field

The present invention relates to the field of electrophotographic image forming, and more particularly, to a process cartridge detachably mountable in an electrophotographic image forming apparatus and a developing cartridge detachably mountable in the process cartridge.

Background

The electrophotographic image formation is a process of irradiating the surface of a photosensitive member with laser light loaded with image formation information to form an electrostatic latent image on the surface of the photosensitive member, developing the electrostatic latent image with a developer, transferring the developed electrostatic latent image to an image forming medium by the photosensitive member, and finally fixing and curing. Conventionally, a developer for developing an electrostatic latent image is stored in a developer storage chamber of a developing cartridge, and in order to ensure that an end user can timely and accurately grasp life information of the developer in use, counting devices are provided in both an image forming apparatus and the developing cartridge.

Fig. 1 is a schematic structural diagram of a conventional counting device. As shown in the drawing, the counting apparatus includes a contacted member 100 provided in the image forming apparatus, a trigger end 052 provided in the developing cartridge, a contact end 051 integrally formed with the trigger end 052, and a rotation member 04 which triggers the movement of the contact end 051. Initially, the contacted member 100 is abutted by the trigger end 052, the rotating member 04 comprises a large-diameter part 042, a small-diameter part 043 and a convex part 041 coaxial with the rotating member 04, an elastic friction layer is arranged in the circumferential direction of the large-diameter part 042, when the large-diameter part 042 is opposite to the driving gear 031, the rotating member 04 is driven and rotates in the direction shown by G in the figure, the contact end 051 drives the trigger end 052 to move under the driving of the convex part 041, and the contacted member 100 is not abutted by the trigger end 052 any more; when the small diameter portion 043 opposes the drive gear 031, the rotor 04 cannot be rotationally driven, the projection 041 is also out of contact with the contact end 051, the trigger end 052 again abuts the contacted member 100, and the cartridge completes counting, whereby the life information of the developer in the cartridge is confirmed.

Although the above structure can complete the counting process of the developing cartridge, the elastic friction layer is arranged in the circumferential direction of the large-diameter part 042, and the elastic friction layer can volatilize the due elastic function under the severe environment of high temperature and high humidity, so that the rotating member 04 cannot be driven to rotate, and the counting work of the developing cartridge cannot be completed.

Disclosure of Invention

The invention provides a developing box, wherein a counting assembly in the developing box is realized by a mechanical structure, and an elastic friction layer is not arranged on a rotating member any more, so that the counting work of the developing box can be successfully completed.

In order to achieve the purpose, the invention adopts the following technical scheme:

the developing box comprises a shell, a driving end cover, a counting assembly and a power receiving part, wherein the driving end cover and the counting assembly are arranged at one longitudinal tail end of the shell, the power receiving part is used for receiving driving force from the outside, the counting assembly starts to work when receiving the driving force transmitted by the power receiving part, the counting assembly comprises a positioning part, a sliding part, a counting tooth, a first elastic part, a shifting part and a second elastic part, and the positioning part is fixed between the driving end cover and the shell and penetrates through the counting tooth; the sliding part is movably arranged in the positioning part; the counting teeth are used for receiving the driving force transmitted by the power receiving part; the first elastic piece is arranged between the counting teeth and the shell, and the second elastic piece is arranged between the sliding piece and the positioning piece; the poking piece is rotatably arranged on the shell and is kept in contact with the sliding piece.

The driving end cover comprises a driving end cover body, a through hole, a counting hole, a marking part and a protruding plate, wherein the through hole is formed in the driving end cover body and is used for allowing the power receiving part to pass through; the marking part corresponds to the marked part on the counting assembly, and the protruding plate protrudes into the counting hole from the inner wall of the counting hole; the protruding plate is circular, and an annular hole is formed between the protruding plate and the inner wall of the counting hole; a positioning hole is formed in the center of the protruding plate and used for being combined with the positioning piece, and a first guide groove is formed in the positioning hole in a mode that the positioning hole extends along the radius direction of the protruding plate.

The positioning piece comprises a cover part, a cavity part and a positioning part, the cavity part is respectively connected with the cover part and the positioning part and is positioned between the cover part and the positioning part, the cover part comprises a disc-shaped cover body, a second guide groove and a positioning protrusion, the second guide groove and the positioning protrusion are arranged on the cover body, and the positioning protrusion penetrates through the positioning hole; the cavity part is used for accommodating the sliding part and comprises a first cavity and a second cavity which are communicated with each other, the first cavity is close to the cover part, and the second cavity is close to the positioning part; the positioning part extends from the outer wall of the cavity part to the direction far away from the cover part.

A first supporting column and a second supporting column extend from the outer wall of the second cavity to the direction far away from the first cavity along the length direction of the positioning piece; when the rotation is performed by taking the R1 as the center, the circles of the rotation tracks of the center R2 and the center R3 are not concentric, wherein R1 is the center of the cover, R2 is the center of the first support column, and R3 is the center of the second support column.

The slider has a front end face and a rear end face, and includes a first slider body and a second slider body connected to each other, a sliding protrusion protruding from the front end face in a normal sliding direction of the slider, and a guided protrusion protruding from the first slider body in a direction parallel to at least one of the front end face and the rear end face and perpendicular to the sliding direction of the slider.

The counting teeth comprise cylindrical counting tooth bodies, teeth arranged on the circumferences of the counting tooth bodies and gear cavities formed by the surrounding of the counting tooth bodies, and diameter-variable parts with different diameters from the gear cavities of the counting teeth are arranged in the counting teeth; the counting tooth further comprises a partition plate located in the gear cavity, a center hole, a first alignment hole and a second alignment hole are formed in the partition plate, the center hole is used for allowing the positioning piece to penetrate through, and the first alignment hole and the second alignment hole are respectively used for being matched with the first supporting column and the second supporting column.

When the counter rotates around the center of R4, the circles where the rotation tracks of the center of R5 and the center of R6 are located are not concentric, wherein R4 is the center of the counting teeth, R5 is the center of the first alignment hole, and R6 is the center of the second alignment hole.

The present invention also provides a process cartridge comprising a drum assembly and the developing cartridge as described above, the developing cartridge being detachably mountable in the drum assembly.

The counting assembly is realized by a mechanical mechanism, and an elastic friction layer is not arranged on the rotating part any more, so that the counting work of the developing box can be smoothly completed.

Drawings

Fig. 1 is a schematic structural diagram of a conventional counting device.

Fig. 2 is a schematic view of the overall structure of the process cartridge according to the present invention.

Fig. 3 is an exploded schematic view of a process cartridge according to the present invention.

Fig. 4 is a schematic structural view of a driving end of the developing cartridge according to the present invention.

Fig. 5 is an exploded schematic view of a driving end of the developing cartridge according to the present invention.

Fig. 5A is a schematic structural view of the inside of the driving end cap of the developing cartridge according to the present invention.

Fig. 5B is a schematic structural view of a positioning member of the developing cartridge according to the present invention.

Fig. 5C is a schematic structural view of a positioning member of the developing cartridge according to the present invention as viewed from one of the ends.

Fig. 5D is a schematic structural view of a slider of the developing cartridge according to the present invention.

Fig. 5E is a front structural view of the counter teeth of the developing cartridge according to the present invention.

Fig. 5F is a schematic reverse structure view of the counter teeth of the developing cartridge according to the present invention.

Fig. 5G is a front plan view of the counter teeth of the developing cartridge according to the present invention.

Fig. 5H is a schematic structural view of a dial of the developing cartridge according to the present invention.

Fig. 6 is an exploded view of the conductive end of the developing cartridge according to the present invention.

Fig. 6A is an enlarged schematic view of a part of the structure of the developing cartridge and the drum assembly according to the present invention.

Fig. 7 is a schematic structural view of a first conductive holder of the developing cartridge according to the present invention.

Fig. 8 is a side view of the conductive end of the developing cartridge according to the present invention.

FIG. 9 is an enlarged view of a part of the structure of the conductive end of the developing roller according to the present invention.

Fig. 10A is a schematic view of the entire structure of the developing cartridge before counting by the counting assembly according to the present invention.

Fig. 10B is a side view of the driving end of the cartridge before counting with the counting assembly of the present invention.

FIG. 10C is a cross-sectional view taken along the direction J-J of the counting assembly of the present invention prior to counting.

FIG. 10D is a cross-sectional view taken along the line K-K of the counting assembly of the present invention prior to counting.

Fig. 11A is a schematic view of the entire structure of the developing cartridge in counting by the counting assembly according to the present invention.

Fig. 11B is a side view of the driving end of the developing cartridge in counting of the counting assembly according to the present invention.

FIG. 11C is a sectional view of the counting assembly of the present invention taken along the direction J-J in counting.

FIG. 11D is a cross-sectional view of the counting assembly of the present invention taken along the line K-K during counting.

Fig. 12A is a schematic view of the entire structure of the developing cartridge after the counting of the counting assembly according to the present invention is completed.

Fig. 12B is a side view of the driving end of the developing cartridge after the counting assembly according to the present invention is completed.

FIG. 12C is a cross-sectional view taken along the direction J-J of the counting assembly of the present invention after counting is completed.

FIG. 12D is a cross-sectional view taken along the line K-K of the counter assembly of the present invention after counting is complete.

Detailed Description

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

[ Structure of Process Cartridge ]

FIG. 2 is a schematic view showing the overall structure of a process cartridge according to the present invention; fig. 3 is an exploded schematic view of a process cartridge according to the present invention. For clarity of description, the following descriptions of the directions are defined as follows: the length direction of the process cartridge C is longitudinal X, the width direction of the process cartridge C is transverse Y, the height direction of the process cartridge C is vertical Z, and the direction from the drive end of the process cartridge C to the conductive end is + X direction, the direction (a) in which the process cartridge C is mounted to the image forming apparatus is + Y direction, that is, the direction a in which the process cartridge C is mounted to the image forming apparatus is parallel to the transverse direction.

As shown in the drawing, the process cartridge C includes a drum assembly PU and a developing cartridge D detachably mounted in the drum assembly PU, the developing cartridge D being mounted to the drum assembly PU in a mounting direction a. The drum assembly PU includes a front end PU0, a first side PU1, a rear end PU2, a second side PU3 and a bottom wall PU5, wherein the front end PU0 and the rear end PU2 are oppositely arranged in the transverse direction, the first side PU1 and the second side PU3 are oppositely arranged in the longitudinal direction, a front end PU0 is located at the downstream of the transverse direction of the rear end PU2, the first side PU1 is located at the upstream of the longitudinal direction of the second side PU3, and the front end PU0, the first side PU1, the rear end PU2 and the second side PU3 are sequentially connected and enclose with the bottom wall PU5 to form a developing cartridge accommodating chamber PU 4. When the process cartridge C is mounted to the image forming apparatus, one end of the process cartridge C receives a driving force from the image forming apparatus and the other end receives power from the image forming apparatus in the longitudinal direction, and thus, the process cartridge C has a conductive end E and a driving end F at both longitudinal ends, respectively, and correspondingly, the developing cartridge D also has a conductive end E and a driving end F at both longitudinal ends, respectively.

As shown in fig. 2, the rear end face PU2 is further provided with a drum assembly handle PU21 and a rear end edge PU22 for grasping the drum assembly PU, and the drum assembly handle PU21 and the rear end edge PU22 both extend in the longitudinal direction and protrude from the rear end face PU2 in the-Y direction. The developing cartridge D is coupled to the rear end edge PU22 by a fastening member 5 (described later) provided therein, so that the coupling of the developing cartridge D to the drum assembly PU in the vertical direction is achieved, thereby preventing the developing cartridge D from coming out of the drum assembly PU at the time of operation.

[ Structure of developing Cartridge ]

The developing cartridge D is adapted to be detachably mounted in an image forming apparatus by a drum assembly, and includes a casing 1, a developing member 10 rotatably mounted in the casing 1, conductive members 3 and driving end caps 21 respectively mounted at both longitudinal ends of the casing 1, a developing cartridge handle 11 projecting from the casing 1, the developing cartridge handle 11 being disposed opposite to the developing member 10 in a transverse direction of the developing cartridge D, the developing cartridge handle 11 being located upstream of the developing member 10 in the transverse direction, the developing member 10 having a rotational axis L2. After the developing cartridge D is mounted to the drum assembly PU, in order to prevent the developing cartridge D from being released from the drum assembly PU, the developing cartridge D further includes a fastening assembly 5 mounted on the casing 1, and meanwhile, in order to ensure that the developing cartridge D is combined with the drum assembly PU with a predetermined binding force in the longitudinal direction, the developing cartridge D further includes a pushing assembly 4 mounted on the casing 1, as shown in the figure, the fastening assembly 5 and the pushing assembly 4 are both located at the rear end of the mounting direction of the developing cartridge D; the fastening component 5 is combined with the rear end edge PU22 of the drum component PU to prevent the developing box D from being separated from the drum component PU; urge and push away subassembly 4 through with the rear end face PU2 butt of drum subassembly PU, realize that developing cartridge D combines with drum subassembly PU with predetermined cohesion on longitudinal direction.

[ Structure of Driving end of developing Cartridge ]

Fig. 4 is a schematic structural view of a driving end of the developing cartridge according to the present invention; fig. 5 is an exploded schematic view of a driving end of the developing cartridge according to the present invention; fig. 5A is a schematic structural view of the inside of a driving end cap of the developing cartridge according to the present invention; fig. 5B is a schematic structural view of a positioning member of the developing cartridge according to the present invention; fig. 5C is a schematic structural view of a positioning member of the developing cartridge according to the present invention as viewed from one of the ends; fig. 5D is a schematic structural view of a slider of the developing cartridge relating to the present invention; FIG. 5E is a schematic front view of a counting tooth of the developing cartridge according to the present invention; FIG. 5F is a schematic reverse structure view of a counter tooth of the developing cartridge according to the present invention; fig. 5G is a front plan view of the counting teeth of the developing cartridge according to the present invention; fig. 5H is a schematic structural view of a dial of the developing cartridge according to the present invention.

As shown in fig. 4, the driving end F of the developing cartridge D is at least provided with the power receiving element 22, and meanwhile, the developing cartridge D further includes a counting assembly 23 and a driving end cap 21 which are mounted at one longitudinal end of the housing 1, the counting assembly 23 abuts against a contacted member in the printer, and starts to operate when receiving the driving force transmitted from the power receiving element 22, and cooperates with the contacted member to count the developing cartridge, so that the counting assembly 23 can be disposed at the driving end F, and can also be disposed at the conductive end E, and from the viewpoint of improving the transmission efficiency of the developing cartridge D, it is preferable that the counting assembly 23 is disposed at the driving end F.

As shown in fig. 5, the power receiving member 22 has a rotation axis L1, and includes a power transmitting gear 221 and a power receiving portion 222 coupled to each other, the power receiving portion 222 penetrates the driving cover 21 for receiving a driving force from the outside, and the power transmitting gear 221 is rotated by the power receiving portion 222 to transmit the driving force to a gear engaged therewith, such as a developing gear, a powder feeder gear, a stirring member gear, and the like.

[ Structure of counting Assembly ]

As shown in fig. 5, the counting assembly 23 includes a positioning member 231, a sliding member 232, a counting tooth 233, a first elastic member 234, a toggle member 235 and a second elastic member 236, the positioning member 231 is fixed between the driving cap 21 and the housing 1 and passes through the counting tooth 233, the sliding member 232 is movably mounted in the positioning member 231 and can slide in a positive sliding direction shown by d1 and a d2 direction opposite to the d1 direction, i.e., a negative sliding direction, when the sliding member 232 slides in the positive sliding direction shown by d1, the sliding member 232 extends, and when the sliding member 232 slides in the negative sliding direction shown by d2, the sliding member 232 retracts, i.e., the sliding member 232 is mounted in the positioning member 231 such that it can extend and retract; in the sliding directions d1 and d2 of the sliding member 232, at least the straight line of the sliding direction d1 intersects with the rotation axis L1 of the power receiving part 22, so that the sliding member 232 is ensured to be in contact with the toggle member 235, preferably, at least the straight line of the sliding direction d1 is perpendicular to the rotation axis L1 of the power receiving part 22, and more preferably, the straight lines of the sliding directions d1 and d2 are both perpendicular to the rotation axis L1 of the power receiving part 22; the counter teeth 233 are used for receiving the driving force transmitted from the power receiving part 22; the first elastic member 234 is installed between the counting teeth 233 and the housing 1, the second elastic member 236 is installed between the sliding member 232 and the positioning member 231, the toggle member 235 is rotatably installed on the housing 1 and is kept in contact with the sliding member 232, and when the sliding member 232 applies force to the toggle member 235, the toggle member 235 rotates around the rotation axis thereof.

Before further describing the structure of the components of the counter assembly 23, the structure of the drive end cap 21 will be described.

As shown in fig. 5 and 5A, the driving end cap 21 includes a driving end cap body 211, a through hole 212 provided on the driving end cap body 211, a counting hole 213, a marking part 214, and a protruding plate 215, the through hole 212 for allowing the power receiving part 222 to pass therethrough; the marking part 214 corresponds to the marked part on the counting assembly 23 and is used for indicating the state of the counting assembly 23; a marking part 214 is arranged along the circumferential direction of the counting hole 213, which can be in any visual shape or color, preferably, the marking part 214 is an arrow mark arranged on the driving end cover main body 211; the protrusion plate 215 protrudes from the inner wall of the counting hole 213 into the counting hole 213, the protrusion plate 215 has a circular shape, a circular hole 2131 is formed between the protrusion plate 215 and the inner wall of the counting hole 213, a positioning hole 2151 is formed at the center of the protrusion plate 215, the positioning hole 2151 is used to be combined with the positioning member 231 to position the positioning member 231, a first guide groove 2152 is formed to extend from the positioning hole 2151 in the radial direction of the protrusion plate 215, and thus, the positioning hole 2151 communicates with the first guide groove 2152, the first guide groove 2152 may be closed or open according to the movement distance of a member sliding in the first guide groove 2152, and when the first guide groove 2152 is open, the positioning hole 2151, the first guide groove 2152, and the circular hole 2131 communicate with each other.

When the assembly of the developing cartridge D is completed, the positioning member 231 is fixed between the driving cap 21 and the casing 1, specifically, the positioning member 231 is located between the protruding plate 215 and the casing 1, the sliding member 232 is guided by the first guide groove 2152, in order to ensure that the force of the sliding member 232 can be applied to the dial 235, the driving cap 21 further includes an acting hole 216 disposed adjacent to the counting hole 213, and the sliding member 232 is in contact with the dial 235 through the acting hole 216.

The structure of each component in the counter assembly 23 is described in detail below in conjunction with fig. 5B-5H.

[ Structure of positioning Member ]

As shown in fig. 5B, the positioning member 231 includes a first portion (cover portion) 231a, a second portion (cavity portion) 231B and a third portion (positioning portion) 231c, and the second portion 231B is connected to the first portion 231a and the third portion 231c, respectively, and is located between the first portion 231a and the third portion 231 c.

The first portion 231a includes a cover 231a1 having a disk shape, a second guiding groove 231a2 provided on the cover 231a1, and a positioning protrusion 231a3, the second guiding groove 231a2 is used for guiding the sliding member 232, and the positioning protrusion 231a3 passes through the positioning hole 2151, thereby ensuring that the positioning member 231 is positioned between the driving cap 21 and the housing 1.

The second portion 231b is used for accommodating the sliding member 232, and includes a first cavity 231b1 and a second cavity 231b2 which are communicated with each other, along the length direction of the positioning member 231, the first cavity 231b1 is close to the first portion 231a and is communicated with the second guiding groove 231a2, the second cavity 231b2 is close to the third portion 231c, and in the direction perpendicular to the side wall of the second guiding groove 231a2, the second cavity 231b2 is longer than the first cavity 231b1, so that a first step 231b3 is formed between the first cavity 231b1 and the second cavity 231b 2; a first supporting column 231b4 and a second supporting column 231b5 are formed along the length direction of the positioning member 231, extending from the outer wall of the second cavity 231b2 to a direction away from the first cavity 231b1, the first supporting column 231b4 and the second supporting column 231b5 extend to the same length and are parallel to the third portion 231C, preferably, the first supporting column 231b4 and the second supporting column 231b5 are cylindrical bodies, as shown in fig. 5C, when viewed from the free ends thereof, the first portion 231a has a center R1, the first supporting column 231b4 has a center R2, the second supporting column 231b5 has a center R3, R1R2 represents the distance between the center R1 and the center R2, R1R 9 represents the distance between the center 1 and the center 686r 3, in the embodiment of the present invention, R1R2 is different from R1R3, that is, when the distance between the center R867 and the center R867 is taken as the center R36 2, or when the center R1 is taken as a radius, when the distance between R1R3 is a radius, the circle center R2 is not on the circle, in other words, when rotating around R1, the circles where the rotation tracks of the circle center R2 and the circle center R3 are not concentric.

The third portion 231c is a rod-shaped body, and the third portion 231c extends from the outer wall of the second cavity 231b2 in a direction away from the first portion (cover) 231a along the length direction of the positioning member 231, and the third portion 231c extends longer than the first support column 231b4 and the second support portion 231b5, and when the assembly of the developing cartridge D is completed, the third portion 231c contacts the housing 1.

[ Structure of sliding Member ]

As shown in fig. 5D, the slider 232 has a front end face 2323 and a rear end face 2324, the front end face 2323 is located downstream of the rear end face 2324 along the positive sliding direction D1 of the slider 232, the slider 232 includes a first sliding body 2321 and a second sliding body 2322 connected to each other, a sliding protrusion 2325, a guided protrusion 2326, the sliding protrusion 2325 protrudes from the front end face 2323 along the positive sliding direction of the slider 232 for applying a force to the toggle piece 235 when the slider 232 slides in the positive sliding direction D1; the guided protrusion 2326 protrudes from the first sliding body 2321 in a direction parallel to at least one of the front end surface 2323 and the rear end surface 2324 and perpendicular to the sliding direction of the slider 232, and the guided protrusion 2326 is guided by the first guide groove 2152 and the second guide groove 231a2 when the slider 232 slides.

A second step 2327 is formed at a critical position of the first sliding body 2321 and the second sliding body 2322, after the sliding member 232 is mounted to the positioning member 231, the first sliding body 2321 is received by the first cavity 231b1, the second sliding body 2322 is received by the second cavity 231b2, and the first step 231b3 is opposite to the second step 2327, so that the sliding member 232 cannot be pulled out of the positioning member 231.

The second elastic member 236 is installed between the sliding member 232 and the positioning member 231 for providing a reciprocating force to the sliding member 232, preferably, the second elastic member 236 is a spring, and in order to prevent the spring 236 from being released, the sliding member 232 is further provided with a second elastic member accommodating portion 2328 for accommodating the second elastic member 236, and specifically, the second elastic member accommodating portion 2328 is an accommodating groove extending from the sliding member rear end surface 2324 to the front end surface 2323.

[ Structure of the counting teeth ]

As shown in fig. 5E, the counter teeth 233 include a cylindrical counter tooth body 233a, teeth 233b provided on the circumference of the counter tooth body, a gear cavity 233i surrounded by the counter tooth body, a partition 233c located in the gear cavity, and first protrusions 233g provided on the counter tooth body.

Corresponding to the marking part 214, the first protrusion 233g is provided with a marked part 233g1, and as shown in fig. 5E, the marked part 233g1 is a groove provided on the first protrusion 233 g.

The partition plate 233c is formed integrally or separately with the counting tooth body 233a, the partition plate 233c is further provided with a center hole 233f, a first alignment hole 233d and a second alignment hole 233e, the center hole 233f is for allowing the positioning member 231 to pass therethrough, the first alignment hole 233d and the second alignment hole 233e are for fitting with the first support column 231b4 and the second support column 231b5, respectively, as shown in fig. 5G, R4 is the center of the counting tooth 233, R5 is the center of the first alignment hole 233d, R6 is the center of the second alignment hole 233e, R4R5 represents the distance between the center of the counting tooth 233 and the center of the first alignment hole 233d, R4R6 represents the distance between the center of the counting tooth 233 and the center of the second alignment hole 233e, R5 and R4R6 are unequal, that is, when the distance between R4R5 and the center of the circle is the circle, R7 is not on the center of the circle, or R6, when the distance between the center of the circle R632 is drawn as a circle 6, the circle center R5 is not on the circle, in other words, when rotating around R4, the circles on which the rotation trajectories of the circle center R5 and the circle center R6 are located are not concentric; to ensure that the first alignment hole 233d corresponds to the first support column 231b4 and the second alignment hole 233e corresponds to the second support column 231b5, the distance R1R2 between the center R1 and the center R2 is equal to the distance R4R5 between the center of the counting tooth 233 and the center of the first alignment hole 233d, and the distance R1R3 between the center R1 and the center R3 is equal to the distance R4R6 between the center of the counting tooth 233 and the center of the second alignment hole 233 e.

As shown in fig. 5E, to implement the counting function of the present invention, the side wall 233h of the gear cavity 233i includes at least one large diameter portion 233h2 and one small diameter portion 233h1, the large diameter portion 233h2 is connected to the small diameter portion 233h1, the radius of the large diameter portion 233h2 is R2, and the radius of the small diameter portion 233h1 is R1, in this embodiment of the present invention, the radius R1 of the small diameter portion 233h1 is the radius of the gear cavity 233i, that is, the distance from the center R4 to the large diameter portion 233h2 is R2, and the distance from the center R4 to the small diameter portion 233h1 is R1; as shown in fig. 5G, the side wall 233h has a first critical point M and a second critical point N, which are located at the boundary of the large-diameter portion 233h2 and the small-diameter portion 233h 1.

As described above, the first elastic member 234 is installed between the counting teeth 233 and the housing 1, specifically, the first elastic member 234 is a spring, and is installed between the partition plate 233c and the housing 1, and in order to prevent the spring 234 from coming off, the counting teeth 233 further includes the second protrusion 233j protruding from the partition plate 233c in a direction away from the gear cavity 233i, and the second protrusion 233j has the first elastic member accommodating portion 233k for accommodating the spring 234 formed therein, as shown in fig. 5F, and the protruding direction of the second protrusion 233j is opposite to that of the first protrusion 233 g.

[ Structure of toggle Member ]

As shown in fig. 5H, the toggle member 235 includes a rotation portion 235a, a connection portion 235b, a contact portion 235c and a toggle portion 235e, and at least one of the contact portion 235c and the toggle portion 235e is connected to the rotation portion 235a through the connection portion 235 b. When the developing cartridge D is assembled, the rotating portion 235a is rotatably mounted on the casing 1, the contact portion 235c abuts against the slider 232, and when the slider 232 slides in the normal sliding direction D1, the contact portion 235c is pushed by the slider 232 to rotate around the rotating portion 235a, and at the same time, the toggle portion 235e is rotated around the rotating portion 235 a.

In the embodiment of the present invention, the connecting portion 235b is not required, that is, at least one of the contact portion 235c and the toggle portion 235e may be directly connected to the rotating portion 235a, and therefore, the toggle portion 235 may be further described as including the rotating portion 235a, the contact portion 235c and the toggle portion 235e, and at least one of the contact portion 235c and the toggle portion 235e is connected to the rotating portion; even more simply, the contact portion 235c and the toggle portion 235e can also be combined into a single component, a contact toggle portion, i.e., the toggle portion 235 includes the contact toggle portion and the rotating portion 235a connected to each other.

As described above, the toggle member 235 is abutted by the sliding member 232 and receives the acting force applied by the sliding member 232, and the sliding member 232 is slidably mounted in the positioning member 231, in order to reduce the volume of the cavity 231b accommodating the sliding member 232 and further reduce the production cost of the positioning member 231, the contact portion 235c is further provided with an avoiding portion 235d, and initially, the sliding member 232 enters the avoiding portion 235 d; when the contact portion 235c and the toggle portion 235e are combined to be a contact toggle portion, the avoiding portion 235d is disposed on the contact toggle portion.

Before the process cartridge C is operated, the developing cartridge D needs to be mounted in the developing cartridge accommodating chamber PU4 of the drum assembly so that the developing member 10 is brought close to the photosensitive member mounted in the drum assembly PU, and at the same time, the developing cartridge D needs to be prevented from coming out of the drum assembly PU during the operation of the process cartridge C, and therefore, the developing cartridge D according to the present invention further includes the urging member 4 and the fastening member 5 provided therein.

[ urging member and fastening member ]

Fig. 6 is an exploded schematic view of a conductive end of a developing cartridge according to the present invention; fig. 6A is an enlarged schematic view of a part of the structure of the developing cartridge and the drum assembly according to the present invention.

Urge to push away subassembly 4 and be installed at the rear end of developing cartridge D installation direction, that is the rear end of casing 1, including urge to push away 41 and urge the spring 42 that pushes away with urging of pushing away 41 butt, simultaneously, still be provided with on the casing 1 and be used for installing the urge to push away the hole 14 of urging of subassembly 4, urge the one end of pushing away spring 42 with urge to push away 41 butt, the other end with urge to push away the hole bottom wall butt, therefore, urge to push away 41 movably to be installed in urging to push away hole 14, when developing cartridge D is installed at drum subassembly PU, urge to push away 41 and drum subassembly PU's rear end PU2 butt, and then force developing 10 and photosensitive member to keep close to.

The fastening member 5 is mounted on the casing at the rear end in the mounting direction of the developing cartridge D, that is, the rear end of the casing 1, and includes a fastening member 51 and an elastic compensation member 52, the elastic compensation member 52 connects the fastening member 51 to the casing 1, and the fastening member 51 is engaged with the rear end edge PU22 of the drum assembly. As shown in fig. 6A, the fastening member 51 includes a fastening portion 510 and an intermediate portion 511 which are connected to each other, the elastic compensator 52 is connected to the intermediate portion 511, the fastening portion 510 is provided with a guide surface 510a and a fastening surface 510b, the guide surface 510a is guided in abutment with the drum assembly rear end edge PU22 during the process of mounting the developing cartridge D to the drum assembly PU, so that the fastening portion 510 is deformed by a force, and the guide surface 510a is ensured to completely pass over the drum assembly rear end edge PU22, and finally, the fastening surface 510b is engaged with the drum assembly rear end edge PU22, at this time, the force F0 applied to the drum assembly rear end edge PU22 by the fastening surface 510b can be decomposed into a horizontal component F1 and a vertical component F2, and the vertical component F2 tensions the drum assembly PU and the developing cartridge D, thereby preventing the developing cartridge D from coming out of the drum assembly PU.

The developing cartridge D in the embodiment of the present invention is combined with the rear end edge PU22 of the drum assembly through the fastening surface 510b, so as to prevent the developing cartridge D from coming off the drum assembly PU, and in practical products, the rear end edge PU22 of the drum assembly may not be exactly the same in size, and when the rear end edge PU22 of the drum assembly is too large in size, the guiding surface 510a may not be able to go over the rear end edge PU22 of the drum assembly, so that the developing cartridge D cannot be fixed. In the embodiment of the present invention, since the elastic compensating member 52 is provided, the guide surface 510a is allowed to move to a greater extent during the process of mounting the developing cartridge D to the drum assembly PU, and it is effectively ensured that the guide surface 510a completely crosses the rear end PU22 of the drum assembly, and the fastening surface 510b is completely coupled to the rear end PU22 of the drum assembly.

[ Structure of conductive terminal of developing cartridge ]

As described above, the process cartridge C needs to receive power from the image forming apparatus during operation, and thus, the developing cartridge D needs to be provided at its conductive end E with the conductive member 3 for receiving power from the image forming apparatus. The structure of the conductive terminal E of the developing cartridge D is described below with reference to fig. 6, 7, 8, and 9.

As shown in fig. 6, the conductive member 3 is mounted on the case conductive end face 12, and includes a first conductive holder 31, a second conductive holder 32, and a developing member conductive member 33 for receiving electric power from the image forming apparatus and supplying the electric power to the developing member 10, the first conductive holder 31 and the second conductive holder 32 being fixedly mounted on the case conductive end face 12, and at least a part of the developing member conductive member 33 being fixedly mounted between the first conductive holder 31 and the second conductive holder 32. To ensure the supply of the developer to the surface of the developing member 10, the developing cartridge D further includes a powder feeding member (not shown) rotatably mounted in the casing 1, the powder feeding member having a rotational axis L3, the rotational axis L3 being parallel to the rotational axis L2, and thus, the conductive member 3 further includes a powder feeding member conductive member 34 for receiving power from the image forming apparatus and supplying to the powder feeding member.

As shown in fig. 8, the projection of the power receiving element 22 at the conductive end E is P, and as shown by the dotted line in the figure, when the developing conductor 33 is mounted to the casing 1, at least a part of the developing conductor 33 is located within the range of the projection P, and the developing conductor 33 does not intersect the rotation axis L1. As shown in fig. 6, the developing member conductive member 33 includes a sleeve 331 and a developing member electric contact portion 332 connected to each other, the developing member electric contact portion 332 being combined with a power output member in the image forming apparatus, the sleeve 331 being for supplying electric power to the shaft 101 of the developing member 10. As shown in fig. 9, when the assembly of the developing cartridge D is completed, the shaft 101 does not extend beyond the casing 1 at the conductive end E, that is, the distal end face 101a of the shaft 101 is not within the range of the casing conductive end distal end face 12, and preferably, the distal end face 101a of the shaft 101 is flush with the casing conductive end distal end face 12; the sleeve 331 has a conductive cavity 333 and a conductive cavity bottom wall 336, the sleeve 331 and the shaft 101 of the developing member 10 are electrically connected through a conductive member 335, preferably, the conductive member 335 is a conductive spring, in order to fix the conductive spring 335, the conductive cavity bottom wall 336 is formed with a positioning column 334 protruding to the conductive cavity 333, one end of the conductive spring 335 is fixed on the positioning column 334, and the other end is abutted against the end surface 101a of the shaft 101. To more stably support the shaft 101, the developing cartridge D further includes a sleeve 35, and as shown in fig. 6 and 9, the sleeve 35 is installed between the shaft 101 and the casing 1.

In the embodiment of the present invention, the developing part conductive member 33 and the powder feeding part conductive member 34 are both fixed to the first conductive bracket 31 by means of a snap-fit, as shown in fig. 7, the first conductive bracket 31 includes a bracket body 311, and a developing part shaft hole 312 and a powder feeding part shaft hole 313 which are arranged on the bracket body 311, the developing part conductive member 33 and the powder feeding part conductive member 34 respectively pass through the developing part shaft hole 312 and the powder feeding part shaft hole 313, in other words, at least a part of the developing part conductive member 33 and the powder feeding part conductive member 34 is supported by the first conductive bracket 31; the first conductive bracket 31 further includes a first receiving groove 314 and a second receiving groove 315 disposed on the bracket body 311, the first receiving groove 314 is communicated with the shaft hole 312 of the developing part, the second receiving groove 315 is communicated with the shaft hole 313 of the powder feeding part, and at least a part of the conductive part 33 of the developing part and a part of the conductive part 34 of the powder feeding part are clamped by the first receiving groove 314 and the second receiving groove 315 respectively.

[ counting Process of developing Cartridge ]

Fig. 10A is a schematic view of the entire structure of the developing cartridge before counting by the counting assembly according to the present invention; FIG. 10B is a side view of the drive end of the cartridge prior to counting with the counting assembly of the present invention; FIG. 10C is a cross-sectional view taken along the line J-J of the counting assembly of the present invention prior to counting; FIG. 10D is a cross-sectional view taken along the line K-K of the counting assembly of the present invention prior to counting.

As shown in fig. 10C, after the assembly of the developing cartridge D is completed, the driving member 24 is combined with the counting teeth 233, specifically, the driving member 24 is a driving gear, and at this time, the driving gear 24 is meshed with the counting teeth 233; as shown in fig. 10B, before the developing cartridge operates, the marking portion 214 corresponds to the marked portion/state indicating portion 233g1, that is, when the marking portion 214 points to the marked portion/state indicating portion 233g1, it indicates that the developing cartridge D is a new developing cartridge.

As shown in fig. 10A and 10B, when the developing cartridge D is mounted to the printer, the power receiving portion 222 is engaged with a power take-off in the printer and receives a driving force output from the power take-off to rotate the power transmission gear 221 in a direction indicated by r3 in the drawing, when the power transmission gear 221 transmits the driving force to the driving gear 24, the driving gear 24 drives the counter teeth 233 to rotate, thereby causing the slider 232 to slide in a positive sliding direction indicated by D1 in fig. 10B and a negative sliding direction indicated by D2, and when the slider 232 slides in the positive sliding direction indicated by D1, the rotating portion 235a of the dial 235 is pushed to rotate in a direction indicated by r5 in fig. 10C; when the slider 232 slides in the negative sliding direction indicated by d2, the toggle member 235 rotates in the direction opposite to the direction indicated by r5 by the reset member.

As shown in fig. 10C and 10D, the counting assembly 23 is in a first state before counting, and the driving gear 24 is engaged with the counting teeth 233; under the action of the spring 236, the front end face 2323 of the slider 232 abuts against the gear cavity side wall 233h of the counting teeth 233, the sliding protrusion 2325 contacts with the contact part 235c, when the contact part 235c is provided with the avoiding part 235d, the sliding protrusion 2325 contacts with the avoiding part 235d, and the contact part 235c is located at the initial position close to the housing 1; the toggle portion 235e is in an initial position abutting a contacted member (not shown) in the printer, at which time the front end face 2323 of the slider 232 abuts the small-diameter portion 233h1 of the gear chamber side wall, and thus, the slider 232 can be regarded as being in a retracted initial state; the first and second support posts 231b4 and 231b5 are offset from the first and

second alignment holes

233d and 233e, respectively; the counter tooth 233 compresses the spring 234 under the action of the first support post 231b4 and the second support post 231b 5.

When the counting teeth 233 receive the driving force of the driving gear 24, and then rotate in the direction indicated by r4 in fig. 10C, as described above, the positioning member 231 is fixed between the driving cover 21 and the housing 1, and when the counting teeth 233 rotate, the positioning member 231 remains stationary, so that the first and

second alignment holes

233d and 233e rotate in the direction indicated by r4 relative to the first and second support columns 231b4 and 231b 5.

As described above, the gear chamber side wall 233h has the first critical point M and the second critical point N, and when the count tooth 233 rotates in the direction indicated by r4, the slider front end surface 2323 will first pass the first critical point M, and at the same time, the first projection 233g will also rotate with the rotation of the count tooth 233, and thus the marked part/state indicating part 233g1 provided on the first projection 233g will gradually move away from the position corresponding to the indicating part 214.

Fig. 11A is a schematic view of the overall structure of the developing cartridge in counting by the counting assembly according to the present invention; FIG. 11B is a side view of the drive end of the developer cartridge during counting of the counting assembly according to the present invention; FIG. 11C is a cross-sectional view taken along the direction J-J of the counting assembly of the present invention during counting; FIG. 11D is a cross-sectional view of the counting assembly of the present invention taken along the line K-K during counting.

As shown in fig. 11A and 11B, the counting assembly 23 is in the second state of counting, the marked part/state indicating part 233g1 no longer corresponds to the indicating part 214, the sliding piece 232 slides out gradually along the positive sliding direction shown by d1, the sliding protrusion 2325 pushes the contact part 235C to rotate gradually along the direction shown by r5 in fig. 10C to be far away from the housing 1, and simultaneously, the toggle part 235e also moves gradually in the direction away from the housing 1, and further, the toggle part 235e no longer abuts against the contacted member in the printer.

As shown in fig. 11C and 11D, the slider front end surface 2323 has passed the first critical point M, entering from the small diameter portion 233h1 of the gear chamber side wall into the large diameter portion 233h2, and thus, the slider 232 is gradually slid in the positive sliding direction indicated by D1 by the spring 236.

The distance R2 from the center R4 of the counting teeth 233 to the large diameter portion 233h2 is greater than the distance to the small diameter portion 233h1, so that once the slider front end face 2323 crosses the first critical point, the slider 232 will be gradually pushed by the spring 236 in the positive sliding direction indicated by d1, when the slider front end face 2323 reaches the midpoint Q of the large diameter portion 233h2, the distance between the front end face 2323 and the center R4 of the counting teeth 233 becomes maximum, the distance that the slider 232 extends out reaches the maximum, as the counting teeth continue to rotate in the direction indicated by R4, the distance between the slider front end face 2323 and the center R4 of the counting teeth 233 gradually decreases, the slider 232 gradually retracts until the slider front end face 2323 crosses the second critical point N, during the period that the slider front end face 2323 abuts against the large diameter portion 233h2, the slider 232 will always be in the extended state, and thus the toggle portion 235e remains separated from the contacted member in the printer, it follows that the time for which the toggle part 235e is separated from the contacted member or the time for which the slider 232 extends is positively correlated with the arc length of the large diameter part 233h2, i.e., the longer the arc length of the large diameter part 233h2, the longer the slider 232 extends, and the longer the toggle part 235e is separated from the contacted member.

During the contact of the slider front end surface 2323 with the large-diameter portion 233h2, the first and

second alignment holes

233d and 233e continue to rotate in the direction indicated by r4 in fig. 10C relative to the first and second support columns 231b4 and 231b5, and as shown in fig. 11C, the first and

second alignment holes

233d and 233e gradually approach the first and second support columns 231b4 and 231b 5.

Fig. 12A is a schematic view showing the entire structure of the developing cartridge after the counting of the counting assembly according to the present invention is completed; FIG. 12B is a side view of the drive end of the cartridge after counting of the counting assembly of the present invention is complete; FIG. 12C is a cross-sectional view taken along the line J-J of the counter assembly of the present invention after counting has been completed; FIG. 12D is a cross-sectional view taken along the line K-K of the counter assembly of the present invention after counting is complete.

As shown in fig. 12A and 12B, the counting assembly 23 is in the third state where counting is completed, the marked part/state indicating part 233g1 reaches the stop position farthest from the indicating part 214, the slide member 232 is retracted in the negative sliding direction shown by d2, the contact part 235C approaches the housing 1 in the direction opposite to the direction shown by r5 in fig. 10C and returns to the initial position approaching the housing 1, and at the same time, the toggle part 235e also returns to the initial position abutting against the contacted member in the printer.

Specifically, as shown in fig. 12C and 12D, the slider front end surface 2323 passes through the second critical point N, and enters again the position of abutment with the small diameter portion 233h1 from the position of abutment with the large diameter portion 233h2, and once the slider front end surface 2323 enters the position of abutment with the small diameter portion 233h1, the slider 232 as a whole is pushed to slide in the negative sliding direction indicated by D2, and the spring 236 is compressed again; when the first alignment hole 233d and the second alignment hole 233e are aligned with the first support post 231b4 and the second support post 231b5, respectively, the counting teeth 233 are not pressed by the first support post 231b4 and the second support post 231b5, the counting teeth 233 move in a direction away from the housing 1 by the elastic force of the spring 234, and thus the counting teeth 233 are disengaged from the drive gear 24, the counting teeth 233 stop rotating by receiving the driving force of the drive gear 24, the slider front end surface 2323 remains in abutment with the small diameter portion 233h1 and does not protrude, the toggle member 235e remains in abutment with a contacted member in the printer, and the counting assembly 23 completes the counting process.

In the embodiment of the present invention, the first supporting column 231b4 and the second supporting column 231b5 are disposed on the positioning member 231, the first aligning hole 233d and the second aligning hole 233e are disposed on the counting teeth 233, when the counting assembly 23 is in the first state, neither the first supporting column 231b4 nor the second supporting column 231b5 is aligned with the first aligning hole 233d and the second aligning hole 233e, the counting teeth 233 are kept engaged with the driving gear 24 under the pressing action of the first supporting column 231b4 and the second supporting column 231b5, the spring 234 between the counting teeth 233 and the housing 1 is compressed, when the counting assembly 23 is in the third state, the first supporting column 231b4 and the second supporting column 231b5 are aligned with the first aligning hole 233d and the second aligning hole 233e, respectively, and the counting teeth 233 are disengaged from the driving gear 24 under the elastic force of the spring 234; likewise, the positions of the first and second support posts 231b4, 231b5 and the first and second alignment holes 233d, 233e may also be: the first supporting post 231b4 and the second supporting post 231b5 are both provided on the counting teeth 233, and the first aligning hole 233d and the second aligning hole 233e are both provided on the positioning member 231; or one of the first supporting post 231b4 and the second supporting post 231b5 is provided on the counting teeth 233 and the other is provided on the positioning member 231, and one of the first aligning hole 233d and the second aligning hole 233e is provided on the counting teeth 233 and the other is provided on the positioning member 231.

In summary, in the counting assembly 23 of the present invention, during the counting process, the toggle member 235 needs to be disengaged from the contacted member in the printer, namely, the toggle member 235 needs to be disengaged from the contacted member in the printer once, and the disengagement process is implemented by providing the large diameter portion 233h2 and the small diameter portion 233h1 in the counting teeth 233, in this embodiment, the diameter of the small diameter portion 233h1 is the same as the diameter of the gear cavity 233i of the counting teeth, and the diameter of the large diameter portion 233h2 is different from the diameter of the gear cavity 233i of the counting teeth, so the structure can be described as follows: a variable diameter portion having a diameter different from that of the gear chamber 233i is provided on the gear chamber side wall 233h of the counter tooth 233 to realize the sliding movement of the slider 232 and further the process of bringing the toggle member 235 out of contact with the contacted member in the printer, and a portion having the same diameter as that of the gear chamber 233i is referred to as a non-variable diameter portion connected to the variable diameter portion.

When the diameter-variable portion is the large-diameter portion 233h2, that is, the distance from the center R4 of the counting teeth 233 to the large-diameter portion 233h2 is greater than the distance to the small-diameter portion 233h1, the slider 232 can slide in the positive sliding direction indicated by d1 during rotation of the counting teeth 233; however, it is also possible to exchange that the distance from the center R4 of the counting tooth 233 to the diameter-variable portion is smaller than the distance from the small-diameter portion 233h1, in this case, the small-diameter portion 233h1 is a non-diameter portion, when the slider 232 abuts against the diameter-variable portion, the slider will slide in the negative sliding direction shown by d2, when the slider 232 abuts against the non-diameter portion, the slider will slide in the positive sliding direction shown by d1, and the time for the toggle portion 235e to be out of contact with the contacted member in the printer is related to the time for the slider 232 to be held in the positive sliding direction shown by d1, so that when the distance from the center R4 of the counting tooth 233 to the diameter-variable portion is smaller than the distance from the non-diameter portion 233, the time for the toggle portion 235e to be out of contact with the contacted member in the printer is related to the positive length of the non-diameter portion; that is, the time when the toggle part 235e is out of contact with the contacted member in the printer is positively correlated with the arc length of one of the variable diameter part and the non-variable diameter part arranged in the gear cavity side wall 233h of the counting gear, which is farther away from the center R4 of the counting gear; since the slider 232 is in the extended state when the toggle portion 235e is out of contact with the contacted member in the printer, the above conclusion can also be summarized as follows: the time that the sliding member 232 extends out is positively correlated with the arc length of one of the variable diameter portion and the non-variable diameter portion arranged in the gear cavity side wall 233h of the counting tooth, which is farther away from the center R4 of the counting gear, wherein the distance from the center R4 of the counting tooth 233 to the variable diameter portion is not equal to the radius of the gear cavity 233i of the counting tooth, and the distance from the center R4 of the counting tooth 233 to the non-variable diameter portion is equal to the radius of the gear cavity 233i of the counting tooth.

The counting assembly 23 in the developing cartridge D according to the embodiment of the present invention only needs to count once, and thus, only one diameter-variable portion and one non-diameter-variable portion connected to each other are disposed in the gear cavity 233i of the counting teeth, and for the developing cartridge D requiring to count many times, the counting assembly 23 described in the present invention is still applicable, and only the number of the diameter-variable portion and the non-diameter-variable portion need to be changed according to the number of the counting times required to be completed, for example, when the counting assembly 23 needs to count twice, the number of the diameter-variable portion and the non-diameter-variable portion are respectively two, and the diameter-variable portion and the non-diameter-variable portion are alternately disposed, so that, regarding the number of the diameter-variable portion and the non-diameter-variable portion, the number of the diameter-variable portion and the non-diameter-variable portion can be set according to the number of the counting times required to be, and the variable-diameter parts and the non-variable-diameter parts are alternately arranged.

As described above, the counting teeth 233 in the counting assembly 23 according to the present invention receive the driving force of the driving gear 24 to rotate, and by providing the large diameter portion 233h2 and the small diameter portion 233h1 therein, the sliding member 232 in the counting assembly 23 moves along the positive sliding direction indicated by d1 and the negative sliding direction indicated by d2 along with the rotation of the counting teeth 233, and further the sliding protrusion 2325 of the sliding member is driven to apply a force to the toggle member 235, so as to complete the counting operation, and therefore, the counting assembly 23 is not provided with an elastic friction layer, but the counting operation is completely realized by a mechanical mechanism, and the operation is stable and reliable.

Claims

1. A developing cartridge includes a casing, a driving cap and a counter assembly mounted at one longitudinal end of the casing, and a power receiving member,

the power receiving part is used for receiving driving force from the outside, the counting assembly starts to work when receiving the driving force transmitted by the power receiving part,

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

the counting assembly comprises a positioning piece, a sliding piece, a counting tooth, a first elastic piece, a shifting piece and a second elastic piece,

the positioning piece is fixed between the driving end cover and the shell and penetrates through the counting teeth;

the counting teeth comprise cylindrical counting tooth bodies, teeth arranged on the circumferences of the counting tooth bodies and gear cavities formed by the surrounding of the counting tooth bodies, the teeth are used for receiving driving force transmitted by the power receiving parts, and the side walls of the gear cavities are provided with diameter-variable parts with different diameters from those of the gear cavities;

the first elastic piece is arranged between the counting teeth and the shell, and the second elastic piece is arranged between the sliding piece and the positioning piece;

one part of the sliding part is abutted against the side wall of the gear cavity and is slidably arranged in the positioning part under the action of the second elastic part; the poking piece is rotatably arranged on the shell and is kept in contact with the sliding piece.

2. The developing cartridge according to claim 1, wherein the driving end cap includes a driving end cap main body, a through hole provided on the driving end cap main body, a counting hole, a marking portion and a protruding plate,

the through hole is used for allowing the power receiving piece to pass through; the marking part corresponds to the marked part on the counting assembly, and the protruding plate protrudes into the counting hole from the inner wall of the counting hole;

the protruding plate is circular, and an annular hole is formed between the protruding plate and the inner wall of the counting hole;

a positioning hole is formed in the center of the protruding plate and used for being combined with the positioning piece, and a first guide groove is formed in the positioning hole in a mode that the positioning hole extends along the radius direction of the protruding plate.

3. A developing cartridge according to claim 1, wherein the positioning member includes a cover portion, a cavity portion and a positioning portion, the cavity portion being connected to and between the cover portion and the positioning portion, respectively,

the cover part comprises a disc-shaped cover body, a second guide groove and a positioning protrusion, and the second guide groove and the positioning protrusion are arranged on the cover body;

the cavity part is used for accommodating the sliding part and comprises a first cavity and a second cavity which are communicated with each other, the first cavity is close to the cover part, and the second cavity is close to the positioning part;

the positioning part extends from the outer wall of the cavity part to the direction far away from the cover part.

4. A developing cartridge according to claim 3, wherein a first supporting column and a second supporting column are formed extending from an outer wall of the second chamber in a direction away from the first chamber along a length direction of the positioning member.

5. A developing cartridge according to claim 4, wherein when rotated about R1, the circles on which the rotation loci of center R2 and center R3 are located are not concentric, wherein R1 is the center of the cover portion, R2 is the center of the first support column, and R3 is the center of the second support column.

6. A developing cartridge according to claim 5, wherein said slider has a front end surface and a rear end surface, includes a first slider body and a second slider body connected to each other, a sliding projection, a guided projection,

the slide projection projects from the front end surface in a normal sliding direction of the slider, and the guided projection projects from the first slider body in a direction parallel to at least one of the front end surface and the rear end surface and perpendicular to the sliding direction of the slider.

7. A developing cartridge according to claim 6, wherein said count tooth further includes a spacer located in the gear chamber, a center hole, a first aligning hole and a second aligning hole being provided in the spacer,

the central hole is used for allowing the positioning piece to pass through, and the first alignment hole and the second alignment hole are respectively used for being matched with the first supporting column and the second supporting column.

8. A developing cartridge according to claim 7, wherein when rotated about R4, the circles on which the rotational loci of center R5 and center R6 are located are not concentric, wherein R4 is the center of the counter teeth, R5 is the center of the first alignment hole, and R6 is the center of the second alignment hole.

9. A process cartridge comprising a drum assembly and the developing cartridge according to any one of claims 1 to 8, which is detachably mountable in the drum assembly.