WO2020211469A1

WO2020211469A1 - Automatically resettable developing cartridge

Info

Publication number: WO2020211469A1
Application number: PCT/CN2019/130664
Authority: WO
Inventors: 唐良春; 吕金波; 曹松林; 李凯
Original assignee: 珠海市源呈数码科技有限公司
Priority date: 2019-04-15
Filing date: 2019-12-31
Publication date: 2020-10-22

Abstract

Provided by the present invention is an automatically resettable developing cartridge. The developing cartridge is detachably installed in a device provided with a counted component, and comprises a casing, a power receiving component and a counting component installed at a longitudinal end of the casing, the power receiving component being configured to receive a driving force from the device and drive the counting component to rotate so that the counting component is combined with the counted component. The developing cartridge further comprises a reset device used for automatically resetting the counting component when the developing cartridge is taken out and reinstalled in the device. When the developing cartridge is taken out and reinstalled, the counting component can be automatically reset without the need of manual operation by a terminal user, which improves the use experience of the terminal user.

Description

Developing cartridge capable of being reset automatically

Technical field

The present invention relates to the field of electrophotographic imaging, and more particularly to a developing cartridge that can be detachably installed in an electrophotographic imaging device such as a printer or a copier, and the developing cartridge can be automatically reset.

Background technique

Commonly used electrophotographic imaging equipment (hereinafter referred to as "equipment"), such as printers or copiers, etc., the developing box is a consumable necessary for the operation of the equipment, which contains the developer required for development, so that the equipment can recognize the installed The developing box, the existing developing box is provided with a counting piece, and the device is provided with a counted piece for matching with the counting piece. When the developing box is installed, the device pairing is realized by the combination and disconnection of the counting piece and the counted piece. Identification of the developing cartridge.

In practice, once paper jams or other problems occur during the use of the developing cartridge, the end user needs to remove the developing cartridge from the device. When the end user installs the developing cartridge into the device again, the counter piece must be reset, otherwise the device will The developer cartridge cannot be identified; however, most end users don’t actually know that there is a counter piece in the developer cartridge, let alone how to reset the counter piece. Even though the developer cartridge has instructions, the existing developer cartridges When resetting, the end cover needs to be disassembled. For the end user, such a design undoubtedly reduces the end user's experience.

Summary of the invention

The present invention provides an automatically resettable developing cartridge. When the developing cartridge is taken out of the device and then installed again, the counting piece can be automatically reset without manual operation by the terminal user, thereby improving the terminal user's use experience.

In order to achieve the above objectives, the present invention adopts the following technical solutions:

Automatically resettable developing cartridge, the developing cartridge is detachably installed in the equipment provided with the counted part, including a housing, a power receiving part and a counting part installed at the longitudinal end of the housing, and an end installed on the same side as the counting part The power receiving member is used to receive the driving force from the device and drive the counter member to rotate so that the counter member is combined with the counter member. The developing cartridge also includes a device for removing the developing cartridge from the device and reinstalling it to the device A reset device that automatically resets the counting part during the process; the reset device includes a force applying part and a reset part that can apply force to the counting part; the end cover includes an end cover body and a perforation provided on the end cover body, the counting part passes through Exposure through the perforation; the resetting piece is arranged on the end cover, the first end of which is connected with the end cover body, and the second end is used to apply force to the counter; along the up and down direction of the developing cartridge, the second end of the resetting piece is located at the center of the perforation Below, along the front and rear direction of the developing cartridge, the second end of the resetting member is located in front of the center of the perforation or in front of the projection point under the end cover.

Preferably, the force applying member and the resetting member do not simultaneously apply a force to the counter member, or, when the developing cartridge is taken out, the force applying member applies a force to the counter member to force the counter member to rotate by a first angle. During installation, the resetting element exerts a force on the counting element to force the counting element to continue to rotate by a second angle.

Preferably, after the counting is completed, the counting member is blocked by the reset member and cannot rotate.

Preferably, the reset member is arranged along the circumferential direction of the perforation, the reset member protrudes from the end cover body in a cantilever manner, the first end is a deformable part connected with the end cover body, and the second end is a deformable part arranged on the The action part, the action part acts with the counting element, and the deformable part is used to provide force for the reset of the action part.

As one of the embodiments, the force applying member is a compression spring for applying force to the counting member in the left and right direction of the developing cartridge.

Among them, the counting member includes a rotating body, an edge protruding radially outward from one end of the rotating body, a counting protrusion protruding from the edge along the axis of rotation of the counting member away from the rotating body, and an actuated radially outer portion of the counting protrusion. When the counter is reset, the acting part applies a force to the acting part.

As another embodiment, the force applying member is a torsion spring that applies force to the counting member along the circumferential direction of the counting member.

Wherein, the end cap further includes a third through hole arranged along the circumference of the perforation, the resetting action rod is arranged in the third through hole, and the resetting member further includes an abutting portion provided therein, and the abutting portion is not subjected to external force. , At least a part of the second end of the reset member is located in the perforation.

Further, the housing includes a lower housing and an upper housing that are combined with each other. The upper housing includes a face cover extending in the front-rear direction and the left-right direction, a support body extending in the left-right direction and intersecting the face cover in the up-down direction, and The part to be joined is arranged at the end of the support body in the left and right direction. The lower housing is provided with a joining part to be joined to the joined part. When one of the upper housing or the lower housing receives a pressing force in the up and down direction, the joint is joined to the other A force along the left-right direction is generated at the joint of the part, which forces the joint part and the joined part to be joined in the left-right direction.

Preferably, the joining position of the joining part and the joined part is not located at the longitudinal end of the housing.

Preferably, the supporting body includes a first part and a second part connected to each other, wherein the first part is closer to the face cover body than the second part, and the second part is substantially trapezoidal.

Preferably, the coupled portion includes a first coupling surface formed in front of the first portion and a second coupling surface formed in the left-right direction of the second portion, and both the first coupling surface and the second coupling surface are coupled with the coupling portion.

Preferably, the first joining surface is parallel to the left-right direction, and the second joining surface is neither perpendicular to the left-right direction nor parallel to the front-rear direction.

Preferably, the second coupling surface is inclined to the left or right with respect to the front and rear direction.

As described above, the developer cartridge of the present invention is provided with an automatic reset device therein, and when the developer cartridge is taken out and installed again, the counting assembly can be automatically reset without manual operation by the end user, which improves the end user's experience.

Description of the drawings

Figure 1 is a schematic diagram of the overall structure of a developing cartridge according to Embodiment 1 of the present invention.

2 is a schematic diagram of the overall structure of the drum assembly involved in the first embodiment of the present invention.

Figure 3 is an exploded schematic view of some parts of the developing cartridge involved in the first embodiment of the present invention.

4 is a cross-sectional view of the developing cartridge according to the first embodiment of the present invention, taken from the middle part of the left-right direction along the front-rear direction.

5A is a perspective view of the upper casing of the developing cartridge according to Embodiment 1 of the present invention when viewed from the outside.

Fig. 5B is an enlarged schematic view of the end of Fig. 5A.

5C is a perspective view of the upper casing of the developing cartridge according to Embodiment 1 of the present invention when viewed from the inside.

Fig. 5D is an enlarged schematic view of the end of Fig. 5C.

6A is a perspective view of the end of the lower casing of the developing cartridge according to the first embodiment of the present invention.

Fig. 6B is an enlarged schematic view of the end of Fig. 6A.

FIG. 7 is a partial schematic diagram of the combination of the upper casing and the lower casing in the developing cartridge according to the first embodiment of the present invention.

Figure 8A is a perspective view of the protective cover in the developing cartridge according to the first embodiment of the present invention.

Fig. 8B is a side view of the end cap according to the first embodiment of the present invention when viewed from left to right.

9A and 9B are three-dimensional views of the counting piece according to the first embodiment of the present invention.

10 is a schematic diagram of a state in which the counting member is separated from the housing of the developing cartridge in the developing cartridge according to the first embodiment of the present invention.

11A to 11E are schematic diagrams of the process from the initial position to the completion of the counting of the counting member in the developing cartridge involved in the first embodiment of the present invention.

Figure 12 is a schematic diagram of the overall structure of the developing cartridge involved in the second embodiment of the present invention.

Figure 13 is an exploded schematic view of the structure of the counting assembly in the developing cartridge according to the second embodiment of the present invention.

FIG. 14A is a schematic diagram of the overall structure of the counting element involved in the second embodiment of the present invention.

Fig. 14B is a top view of the counting element involved in the second embodiment of the present invention.

15A and 15B are perspective views of the end cap involved in the second embodiment of the present invention.

Figure 16A is a schematic diagram of the relative positions of the reset lever and the counter before the developing cartridge involved in the second embodiment of the present invention is installed.

16B is a schematic diagram of the positions of the components of the counting assembly before the developing cartridge according to the second embodiment of the present invention is installed.

Figure 17A is a schematic diagram of the relative positions of the reset lever and the counting member after the developing cartridge according to the second embodiment of the present invention is installed and counting is completed.

17B is a schematic diagram of the positions of the components of the counting assembly after the developing cartridge according to the second embodiment of the present invention is installed and counting is completed.

Fig. 18A is a perspective view of an improved counter piece according to the present invention.

Fig. 18B is a top view of the improved counter piece according to the present invention.

Fig. 18C is a side view of the improved counter piece according to the present invention.

detailed description

The embodiments of the present invention will be described in detail below with reference to the drawings.

Example one

For the convenience of description, first define the developing cartridge as follows: along the length of the developing cartridge is the left and right direction (longitudinal), along the width of the developing cartridge is the front and rear direction (horizontal), and along the thickness of the developing cartridge is the vertical direction (vertical) ), the longitudinal, lateral and vertical directions are perpendicular to each other.

[the whole frame]

1 is a schematic diagram of the overall structure of a developing cartridge related to Embodiment 1 of the present invention; FIG. 2 is a schematic diagram of the overall structure of a drum assembly related to Embodiment 1 of the present invention; FIG. 3 is a partial view of the developing cartridge related to Embodiment 1 of the present invention Fig. 4 is a cross-sectional view of the developing cartridge according to the first embodiment of the present invention, which is cut from the middle part of the left and right direction along the front and back direction.

The developing cartridge 100 is installed in the device in a detachable manner. It is installed when the developing cartridge 100 moves forward, and is removed when the developing cartridge 100 moves backward; when the developing cartridge 100 is installed in the device, it can be removed from the device. Receiving driving force and electric power. Generally, the components for receiving driving force and electric power are respectively located at the longitudinal ends of the developing cartridge. Here, the end receiving the driving force in the developing cartridge is called the driving end, which is used to receive electric power. One end is called a conductive end. Specifically, in the developing cartridge 100 involved in the present invention, the left end is the driving end and the right end is the conductive end.

As shown in Figure 1, the developing cartridge 100 includes a housing 10A, a developing member 4 rotatably mounted in the housing 10A, an end cover 3 fixedly mounted on the housing 10A, and an adjusting member 5; wherein, the housing 10A contains There is a developer (toner) required for development. The developer 4 is used to supply toner to the outside. The adjustment member 5 is in contact with the developer and is used to adjust the thickness of the toner layer on the surface of the developer; The power receiving member 6 is installed at the driving end, and the power receiving member 6 passes through the end cover 3 to be exposed.

Generally, the developing cartridge 100 can also be installed to the drum assembly A20 first, and the two are combined to form a process cartridge, and then the developing cartridge 100 is installed to the device along with the drum assembly A20. As shown in Figure 2, the drum assembly A20 includes a bottom plate A29, and a first plate A21, a second plate A22, a third plate A23, and a fourth plate A24 extending in the same direction from the periphery of the bottom plate A29. The first plate A21, The second plate A22, the third plate A23, the fourth plate A24 and the bottom plate A29 enclose to form a receiving groove A25 for accommodating the developing cartridge 100. The developing cartridge 100 is fixedly mounted to the receiving groove A25 in a detachable manner. After the developer contained in the accommodating cavity is consumed, the end user removes the process cartridge from the device, and then takes the developer cartridge 100 out of the accommodating slot A25, and then the developer cartridge 100 can be refilled with new developer or replaced with a new developer cartridge 100; Similarly, according to the orientation of the developing cartridge 100 defined above, the drum assembly A20 also has the same orientation.

After the developing cartridge 100 is installed in the receiving groove A25, the first plate A21 and the third plate A23 restrict it in the longitudinal direction of the developing cartridge 100 to prevent the developing cartridge 100 from moving in the longitudinal direction.

Further, as shown in FIG. 3, the developing cartridge 100 further includes a counting component 7 used for cooperating with a pre-counted component in the device, a driving component 11 for driving the counting component 7 to rotate, and a stirring component 15 for agitating toner. The driving member 11 receives the driving force of the power receiving member 6 to drive the counting assembly 7, and the stirring member 15 receives the driving force of the power receiving member 6 to rotate.

With reference to FIG. 4, the developing cartridge 100 further includes a supply member 8 rotatably installed in the housing 10A and a sealing member 9 between the housing and the adjusting member 5, and the supply member 8 is used to supply the developing member 4 Toner, along the front and rear direction of the developing cartridge 100, the sealing member 9 is used to seal the space between the adjusting member 5 and the housing 10A; the driving ends of the developing member 4 and the supply member 8 are respectively mounted with a developing member gear 41 and a supply member gear 81, the developing gear 41 and the supply gear 81 are combined with the power receiving member 6, and receive the driving force of the power receiving member 6 to rotate. During operation, the power receiving member 6 rotates around the rotation axis L1, and the counting assembly 7 moves along The direction shown by r (shown in FIG. 11A) rotates around the rotation axis L2.

The housing 10A includes a lower housing 1 and an upper housing 2 combined with each other. The upper housing 2 and the lower housing 1 enclose a accommodating cavity 10 for accommodating carbon powder, and the stirring member 15 is rotatably installed in In the accommodating cavity 10; along the front and rear direction, a powder outlet 13 is formed between the developer 4 and the accommodating cavity 10. The powder outlet 13 extends in the left-right direction, and its extension length is slightly shorter than the developer 4 in the left-right direction The toner is supplied to the developing member 4 through the powder outlet 13 and the sealing member 9 is located above the powder outlet 13. Similarly, the upper casing 2 is also located above the powder outlet 13.

[Combination of upper and lower shells]

One of the upper and lower shells is provided with a welding wire, and the two are combined by ultrasonic. Aiming at the defect that powder is easily leaked at the part of the upper and lower shells opposite to the adjusting member in the existing developing cartridge, the present invention makes the following improvements .

5A is a perspective view of the upper casing of the developing cartridge according to Embodiment 1 of the present invention when viewed from the outside; FIG. 5B is an enlarged schematic view of the end of FIG. 5A; FIG. 5C is the upper casing of the developing cartridge according to Embodiment 1 of the present invention A perspective view when viewed from the inside; FIG. 5D is an enlarged schematic view of the end of FIG. 5C; FIG. 6A is a perspective view of the end of the lower housing of the developing cartridge involved in Embodiment 1 of the present invention; FIG. 6B is an enlarged schematic view of the end of FIG. 6A; Figure 7 is a partial schematic diagram of the combination of the upper casing and the lower casing in the developing cartridge according to the first embodiment of the present invention.

As shown in the figure, the upper housing 2 includes a face cover 21 extending in the front-rear direction and the left-right direction, a support body 22 that extends in the left-right direction and intersects the face cover 21 in the up-down direction, and is provided at the left-right end of the support 22 Preferably, the support body 22 and the face cover 21 are perpendicular to each other, that is, the support body 22 also extends in the up and down direction, and the extension length of the support body 22 in the left and right direction is less than that of the face cover 21 in the left and right directions. The extension length of the direction; preferably, the left and right ends of the support body 23 are provided with the joined part 23, and the joined part at the right end of the support body 22 is used as an example for description.

As shown in the enlarged schematic view of part R1 in FIG. 5B, as a whole, the supporting body 22 includes a first part 221 and a second part 222 connected to each other, wherein the first part 221 is closer to the face cover 21 than the second part 222, and the second part 222 It can be regarded as a part protruding from the first part 221 in a direction away from the face cover 21, and the joined part 23 is recessed on the support 22 from front to back and from right to left, that is, the part of the joined part 23 The front and right sides are suspended, and the joined portion 23 includes a first joining surface 231 formed in front of the first part 221 and a second joining surface 232 formed on the right of the second part 222. The first joining surface 231 and the second joining The surfaces 232 are adjacent; the support body 22 has a front surface 220, the seal 9 is installed on the front surface 220, and the first part 221 and the second part 222 have the same front surface 220.

It should be noted that the first joining surface 231 is parallel to the left-right direction, and the second joining surface 232 is neither perpendicular to the left-right direction nor parallel to the front-to-rear direction. In the area where the joined portion 23 is located, the second joining surface 232 is inclined to the left with respect to the front-to-rear direction. Therefore, as a whole, the second part 222 is trapezoidal. In the direction from back to front, the distance between the left and right ends of the second part 222 is gradually reduced. The good combination of the housing 2 and the lower housing 1 will be described in detail below.

Regarding the upper casing 2, further, as shown in FIGS. 5C and 5D, the first bonding surface 231 and the second bonding surface 232 are respectively provided with a first welding wire 233 and a second welding wire 234, and the face cover 21 is provided with The third welding wire 211 connected with the first welding wire 233, therefore, when the upper casing 2 is combined with the lower casing 1, the edge portion of the casing 10A can be tightly connected; at the same time, the second portion 222 is also provided with The supporting surface 223, the supported surface 223 and the front surface 220 are opposed to each other in the front-to-rear direction. Therefore, the first welding line 233 and the second welding line 234 are blocked between the supported surface 223 and the front end of the upper housing 2 , The third welding wire 211 is blocked between the supported surface 223 and the right end of the upper casing 2.

As shown in FIGS. 6A and 6B, in the lower housing 1, a coupling portion 12 is further provided above the powder outlet 13, and the coupling portion 12 includes a longitudinal portion 12a and a transverse portion 12b that are coupled to each other. The portion 12a is orthogonal to the transverse portion 12b, the longitudinal portion 12a extends in the left-right direction, and the transverse portion 12b extends in the front-rear direction; the longitudinal portion 12a is arranged so that when the upper and lower casings are combined, the coupling portion 12 and the coupled portion 23 are combined The location need not be at the longitudinal end of the housing 10A. The reason is: the longitudinal end of the housing 10A often needs to be equipped with various accessories. Therefore, the structure of the longitudinal end of the housing 10A is relatively more complicated. If the joining position of the joining part 12 and the joined part 23 is located at the longitudinal end of the housing 10A, correspondingly Therefore, the design of the combined structure of the connecting part 12 and the connected part 23 also needs to be complicated, so the difficulty of the design will inevitably increase.

The longitudinal portion 12a has a front surface 121. In the left-right direction, the longitudinal portion 12a and the transverse portion 12b do not completely overlap, that is, in the left-right direction, the transverse portion 12b exposes a surface 123 through the longitudinal portion 12a, that is, along the front and rear direction. The longitudinal portion 12a and the lateral portion 12b form a stepped surface 123, and the left side of the longitudinal portion 12a forms a third joining surface 122. Preferably, the longitudinal portion 12a and the lateral portion 12b have a common upper side surface 124. Therefore, the The overall structure is simplified; as shown in FIG. 6B, the third joining surface 122 is neither parallel to the front-to-rear direction nor perpendicular to the left-to-right direction, but inclined to the left, along the front-to-rear direction, in the area opposite to the step surface 123, The angle between the third joining surface 122 and the up-down direction is an acute angle. Along the left-right direction, the length of the upper side 124 of the longitudinal portion 12a extends less than the length of the rear side opposite to the upper side 124. In general, at least the third The coupling surface 122 has a shape matching the second coupling surface 232, and preferably, the upper side surface 124 of the longitudinal portion 12a has a shape matching the first coupling surface 231.

The upper housing 2 and the lower housing 1 are combined in the vertical direction. Generally, the lower housing 1 is fixed and the upper housing 2 moves from top to bottom. In the upper housing 2, except for the parts corresponding to the joint 23 Area and the area corresponding to the second part 222, the third welding line 211 is distributed along the edge of the upper housing 2, and the extension direction of the third welding line 211 is parallel to the up and down direction. Therefore, when the upper housing 2 is from top to bottom When moving, the third welding wire 211 will move with the upper casing 2 as a whole perpendicular to the lower casing 2. Once the ultrasonic device presses the upper casing 2, the third welding wire 211 will easily combine the upper and lower casings. Part is not the research focus of the present invention. What the present invention will describe is the combination of the support body 22 and the lower housing 1, especially the combination of the two longitudinal ends of the support body 22 and the lower housing 1, specifically, the support The coupling between the coupled portion 23 of the body 22 and the coupling portion 12 located in the lower casing 1.

As described above, both the second joining surface 232 and the third joining surface 122 are inclined to the left, and the second welding line 234 is also provided on the second joining surface 232. Take any point P of the third joining surface 122 as an example. The simplified analysis of the force on point P in Fig. 7 shows that when the upper shell 2 moves from top to bottom toward the lower shell 1, the second welding wire 234 exerts a force f on the third bonding surface 122. The direction of the force f is parallel to the up and down direction, and points from the top to the bottom. It is precisely because the third joining surface 122 is inclined relative to the up and down direction, the force f can be decomposed into a first perpendicular to the third joining surface 122. The component f1 and the second component f2 parallel to the third joining surface 122, wherein the second component f2 provides power for the movement of the upper housing 2 relative to the lower housing 1, and the first component f1 will force the second The bonding wire 234 is pressed against the third bonding surface 122. Further, according to the principle of force decomposition, the first component force f1 will also generate a force parallel to the left and right directions, thereby ensuring that the second bonding surface 232 and the third bonding surface 122 are in contact with each other. The left and right directions can be closely combined.

Further, in the process of combining the second bonding surface 232 and the third bonding surface 122, the supported surface 223 is combined with the stepped surface 123, which is equivalent to the support body 22 being supported by the stepped surface 123, so that the stability of the housing 10A is improved Effective guarantee; at the same time, the first part 221 faces the upper side surface 124 of the longitudinal portion, and the first welding line 233 moves vertically toward the upper side surface 124, similar to the third welding line 211, the first welding line 233 will also be easy The first joining surface 231 is combined with the upper side surface 124 of the longitudinal portion.

As shown in FIG. 7, by the combination of the above-mentioned joining part 12 and the joined part 23, the first joining surface 231 is joined with the upper side surface 124 of the longitudinal part through the first welding wire 233, and the flow path of the carbon powder is Is sealed; the second bonding surface 232 and the third bonding surface 122 are combined by the second welding wire 234, and the flow path of the carbon powder is sealed along the left-right direction and the front-rear direction; preferably, the front surface 220 of the support body and the longitudinal direction The front surface 121 of the part is flush. Finally, the sealing element 9 is installed on the front surface 220 of the support body, and the sealing element 9 crosses the joining position of the joining part 12 and the joined part 23 to reach the front surface 121 of the longitudinal part, namely The sealing member 9 crosses the second joining surface 232 and the third joining surface 122, and the regulating member 5 is installed in front of the sealing member 9. Therefore, the flow path of the toner in the front and rear directions is further sealed, and the overall sealing performance of the developing cartridge 100 is improved. Further improve.

Different from the design in which the second joint surface 232 and the third joint surface 122 are completely opposite in the left-right direction and parallel to the up-down direction in the existing process box, that is, the second joint surface 232 and the third joint surface 122 are both perpendicular to the left-right direction, In the present invention, the second joint surface 232 and the third joint surface 122 are arranged in a shape that is inclined to match the vertical direction and the left-right direction, and the second joint surface 232 and the third joint surface 122 are both facing the housing with respect to the vertical direction. The inner side of 10A is inclined, so that during the joining process of the upper and lower shells, the second joining surface 232 can exert a force on the third joining surface 122 to ensure that the second welding wire 234 located between the two can be fully melted, thereby realizing the up and down The tight coupling of the housing; further, along the left and right directions, the support 22 of the present invention is also provided with a first portion (corner portion) 221 that extends longer than the second portion 222, and the first portion 221 faces downward in the up and down direction The first joining surface 231 of the casing 1 becomes a part of the joined portion 23. At the same time, the longitudinal portion 12a of the lower casing 1 also has an extension in the left-right direction and forms an upper side surface 124 that can be opposed to the first joining surface 231. Preferably, the upper side surface 124 and the first joining surface 231 are both parallel to the left and right direction, and the first welding wire 233 located between the two can be sufficiently melted when subjected to the pressure in the up and down direction, thereby joining the two ends of the upper and lower shells. This further prevents the toner from leaking from the longitudinal end of the housing 10A; as described above, the longitudinal end of the support body of the upper housing is provided with a corner portion 221, and the longitudinal portion 12a of the lower housing extends in the left-right direction, which not only simplifies the joint 12 The combined structure with the joined portion 23 also makes the upper and lower shells more convenient to combine, and the operability when the two are combined is greatly improved; since the two longitudinal ends of the support body 22 are provided with the joined portion 23, On the whole, at least a part (the second part) of the supporting body 22 is substantially trapezoidal, that is, the distance between the two longitudinal ends of the supporting body 22 gradually decreases in the direction from top to bottom.

As a modified embodiment, the design in which the second coupling surface 232 and the third coupling surface 122 are inclined and matched with respect to the up and down direction may also be non-planar matching. For example, the third coupling surface 122 is set in a concave shape. The second joining surface 232 is set to be convex, or the third joining surface is set to be convex, correspondingly, the second joining surface 232 is set to be concave; no matter the second joining surface 232 and the third joining surface 122 are When the upper and lower casings are combined, the second joint surface 232 and the third joint surface 122 can be matched, and when one of the casings is pushed in the vertical direction, the second joint surface 232 and A force along the left-right direction is generated at the joint of the third joining surface 122, which forces the second joining surface 232 and the third joining surface 122 to join in the left-right direction.

[Automatic reset]

8A is a perspective view of the protective cover of the developing cartridge involved in the first embodiment of the present invention; FIG. 8B is a side view of the end cover involved in the first embodiment of the present invention when viewed from left to right.

3, the end cover 3 includes an end cover body 31, a first perforation 32 and a second perforation 33 provided on the end cover body 31, a limit plate 34 extending from the periphery to the middle of the second perforation 33, and a power receiver 6 Exposed through the first perforation 32, the counter assembly 7 includes a counter 72 and a compression spring 71. The counter 72 is exposed through the second perforation 33. The compression spring 71 is installed between the counter 72 and the limit plate 34 for Provide a force for the reset of the counting member 72; as shown in FIG. 8A, the end cover 3 is also provided with a reset rod 35 for blocking the counting member 72 from continuing to rotate after the counting assembly 7 completes counting. When the developing cartridge 100 is removed (disassembled) ), the reset lever 35 no longer blocks the counting member 72. Under the elastic force of the compression spring 71, the counting member 72 continues to rotate to a certain angle. When the developing cartridge 100 is installed again, the reset lever 35 receives an external force and forces the counting The member 72 is reset, and the reset rod 35 is arranged along the circumferential direction of the second perforation 33. Specifically, the reset rod 35 protrudes from the end cover body 31 in a cantilever manner, and includes a deformable portion 351 connected with the end cover body 31 (section One end) and an acting portion 352 (second end) provided on the deformable portion 351. The acting portion 352 acts on the counting member 72, and the deformable portion 351 is used to provide a force for the resetting of the acting portion 352.

As shown in FIG. 8B, along the vertical direction, the ray d1 passes through the center M of the second perforation 33 and is parallel to the vertical direction, the ray d2 passes through the center N of the acting portion 352 and the center M of the second perforation 33, the straight line d1 and the straight line d2 Do not overlap, the angle between the two is α. Preferably, the ray d2 is located in front of the ray d1, that is, the acting portion 352 is located below the center M of the second perforation 33, and the acting portion 352 is located in front of the center M or It is in front of the projection point Q below the end cap 3. The end cover 3 will be installed along the direction indicated by A along with the housing 10A. When the developing cartridge 100 needs to be installed on the drum assembly A20 first, the acting portion 352 will abut the first plate A21 of the drum assembly A20. When 100 does not need to be installed to the drum assembly A20 first, the acting part 352 will abut other parts of the equipment, and the acting part 352 will be forced to push before the point Q. Once the acting part 352 is forced to push, the acting part 352 will be The force can be transmitted to the counting member 72, thereby forcing the counting member 72 to reset. It can be seen that this design helps the counting member 72 to be reset faster to ensure that the counting member 72 is fully installed after the developing cartridge 100 is fully installed. In the reset state, it is different from the existing developing cartridge that needs to be fully installed in place before the counting element starts to be reset; during the reset process, if the acting part 352 is stuck and cannot be applied to the counting element 72 Compared with the existing developing cartridge, it is obvious that the developing cartridge 100 adopting the reset structure described in the present invention can be quickly detected by the operator and quickly taken out. However, since the existing developing cartridge has been completely installed in place, the operator needs to wait until the device is sent out. The prompt knows that the counting member 72 has not been reset. Therefore, the use experience of the developing cartridge 100 of the present invention is better.

9A and 9B are three-dimensional views of the counting member involved in the first embodiment of the present invention; FIG. 10 is a schematic diagram of the state in which the counting member is separated from the developing cartridge housing in the developing cartridge involved in the first embodiment of the present invention; FIGS. 11A-11E are the present invention The first embodiment of the invention relates to a schematic diagram of the process from the initial position of the counting member in the developing cartridge to the completion of counting.

As shown in FIG. 9A, the counter 72 rotates around the rotation axis L2, and includes a rotation body 721, a rim portion 722 protruding radially outward from one end of the rotation body 721, and the rim portion 722 away from the rotation body 721 along the rotation axis L2. The protruding counting protrusion 723, the actuated portion 724 arranged radially outward of the counting protrusion 723, and the tooth portion 726 and the missing tooth portion 725 arranged along the circumferential direction of the rotating body 721; wherein the tooth portion 726 receives the drive of the driving member 11 Rotating by force, along the radial direction of the rotating body 721, the edge 722 does not exceed the tooth 726 without the risk of being broken. The counting protrusion 723 is used to cooperate with the counted part, and the actuated part 724 is used to connect with the end cover 3. The action part 352 is provided to cooperate. When the missing tooth part 725 is opposite to the driving member 11, the counting member 72 is no longer driven and remains stationary.

As shown in FIG. 9B, the counting member 72 further includes a supporting column 720 protruding from the rotating body 721 in a direction opposite to the protruding direction of the counting protrusion 723, and a first slope section 727 and a second slope provided inside the rotating body 721. Section 729, a holding section 728 located between the two, the first slope section 727, the second slope section 729, and the holding section 728 are located on the periphery of the support column 720, and can go around the support column 720 as a whole with the counter 72 It rotates, and the first slope section 727 and the second slope section 729 are both inclined planes.

As shown in FIG. 10, the end of the lower housing 1 is also provided with a positioning column 14 that cooperates with the supporting column 720 and an action protrusion 15 arranged adjacent to the positioning column 14. The action protrusion 15 is provided with a rising slope section 151, The descending slope section 152 and the holding surface 153 located between the two, the ascending slope section 151 and the descending slope section 152 are both inclined planes, relative to the rotation axis L2, the descending slope section 152 has a greater inclination angle than the ascending slope section 151 When counting, the second slope section 729 is first combined with the ascending slope section 151, and then the holding section 728 is combined with the holding surface 153, and finally, the first slope section 727 is combined with the descending slope section 152; or the counting piece 72 is combined with the housing 10A The distance between the counting element 72 is measured, as the counting element 72 rotates, the counting element 72 first gradually moves away from the housing 10A, and then the distance from the housing 10A remains unchanged, and finally, the counting element 72 gradually approaches the housing 10A.

The counting and resetting process of the counting member 72 will be described below with reference to FIGS. 11A-11E.

As shown in FIG. 11A, before the developing cartridge 100 needs to be taken out, the missing tooth portion 725 of the counting member 72 is opposite to the driving member 11, the compression spring 71 is still in a partially compressed state, the first slope section 727 and the descending slope section 152 Part of the joint, the deformable part 351 is elastically deformed, the acting part 352 is pressed and combined with the acting part 724 to limit the rotation of the counter element 71, although the compression spring 71 exerts a urging force on the counter element 72 towards the housing 10A, When the slope section 727 is combined with the descending slope section 152, the counter member 72 has a tendency to rotate around the rotation axis L2 in the direction indicated by r by the forced thrust. However, the rotation of the counter member 72 is restricted by the action part 352 prohibited.

As the developing cartridge 100 is taken out, once the acting portion 352 is no longer compressed, under the action of the elastic restoring force of the deformable portion 351, the acting portion 352 no longer restricts the counting member 72, and finally, in the compression spring 71 and the first slope section Under the combined action of 727 and the descending slope section 152, the counting member 72 rotates by an angle (first angle) around the rotation axis L2 in the direction indicated by r. At this time, the counting member 72 is closer to the lower casing 1; when the developing cartridge 100 is again When being installed, before the developing cartridge 100 is completely installed in place, the deformable portion 351 is elastically deformed again, and the acting portion 352 moves toward the inside of the second perforation 33 while exerting a force on the acting portion 724, forcing the counter member 72 to move along the whole Rotate another angle (a second angle) around the rotation axis L2 in the direction shown by r. At this time, the driving member 11 and the teeth 726 of the counter member 72 begin to engage, and when the developing cartridge 100 is fully installed in place, the counter member 72 is reset .

As the power receiving member 6 starts to receive the external driving force to rotate, the driving member 11 transmits the driving force to the counting member 72, and the counting member 72 starts to count. As shown in FIG. 11C, the counting member 72 rotates in the direction indicated by r The axis L2 continues to rotate, and at the same time, the second slope segment 729 begins to be combined with the ascending slope segment 151, and under the guidance of the ascending slope segment 151, the entire counting element 72 gradually moves away from the lower housing 1, and the counting protrusion 723 gradually extends accordingly , The compression spring 71 is compressed; when the holding section 728 is combined with the holding surface 153, the counting member 72 is the farthest from the lower housing 1, as shown in FIG. 11D, the counting protrusion 723 starts to cooperate with the counting member.

As shown in FIG. 11E, as the counting member 72 continues to rotate, the counting protrusion 723 disengages from the counted member, and the counting of the counting member 72 is completed. At this time, the first slope section 727 starts to be combined with the descending slope section 152, and the spring 71 is compressed. The elastic restoring force starts to be released, and the whole counting member 72 begins to move toward the lower housing 1 until it returns to the position shown in FIG. 11A, that is, the driving member 11 is opposite to the missing tooth portion 725. At this time, even if the power receiving member 6 continues to rotate, the counting member 72 stops rotating because it cannot receive the driving force until the developing cartridge 100 is taken out.

As described above, the counting member 72 of the developing cartridge 100 can be automatically reset, and the terminal user no longer needs to manually reset. Especially for terminal users who have no experience in using the developing cartridge 100, the automatic reset structure can greatly improve the user experience.

[other instructions]

As described above, the driving ends of the developing member 4 and the supply member 8 are respectively installed with the developing member gear 41 and the supply member gear 81, and the developing member gear 41 and the supply member gear 81 are combined with the power receiving member 6 and are The member 6 is driven to rotate, and then the developing member 4 and the supply member 8 are driven to rotate.

As shown in FIG. 3, the power receiving member 6 includes a power receiving portion 61 for receiving driving force, and a first gear 62 and a second gear 63 combined with the power receiving portion 61. The first gear 62 is located at the power receiving portion 61 and the second gear. Between the two gears 63, the diameter of the first gear 62 is smaller than the diameter of the second gear 63, the first gear 62 meshes with the supply gear 41, and the second gear 63 meshes with the developing gear 81.

Compared with the existing developing cartridge, the developing member 4 and the supply member 8 used in the developing cartridge 100 of the present invention have smaller diameters. Correspondingly, the transmission ratio a between the second gear 63 and the developing member gear 41 and the first gear 62 The transmission ratio b between the gear 81 and the supply gear 81 is different from that of the existing developing cartridge. After many experiments and tests by the inventor, the value of a is preferably 36:15, and the value of b is preferably 33:18. Increase the value of the transmission ratio a and b, so that the reduced diameter of the developing member 4 and the supply member 8 can also be applied to the developing cartridge 100; further, since the diameter of the developing member 4 and the supply member 8 are reduced, it means The manufacturing cost of the developing part 4 and the supply part 8 is lower, which ultimately helps to reduce the production cost of the production enterprise.

Example two

In this embodiment, the combination of the upper and lower housings of the developing cartridge will not be described again. The following mainly describes another automatic reset structure of the counter.

[Structure of developing cartridge and process cartridge]

Figure 12 is a schematic diagram of the overall structure of the developing cartridge involved in the second embodiment of the present invention. The developing cartridge involved in this embodiment has the same orientation as the above embodiment, and will not be repeated here.

As shown in Figure 12, the developing cartridge A10 can be installed along the installation direction B, including a housing A11, a rotating member A12 rotatably installed in the housing A11, an end cover A13 located at one longitudinal end of the housing A11, and a power receiving A14 and a counting component A15, the power receiving component A14 and the counting component A15 are both exposed through the end cover A13, the power receiving component A14 is used to receive driving force from the outside, and the driving force is respectively transmitted to the rotating component A12 and the counting component A15; The counting assembly A15 rotates around the rotation axis L2.

Similarly, the developer cartridge A10 involved in this embodiment can be directly installed on the device alone, or it can be installed first on the drum assembly A20 described in the above embodiment, and then installed on the device together with the drum assembly A20. The latter installation method of A10 is described as an example.

[The structure of the counting component]

13 is an exploded schematic view of the structure of the counting assembly in the developing cartridge involved in the second embodiment of the present invention; FIG. 14A is a schematic diagram of the overall structure of the counting member involved in the second embodiment of the present invention; Top view; Figures 15A and 15B are perspective views of the end cap involved in the second embodiment of the present invention.

As shown in FIG. 13, the developing cartridge A10 further includes an intermediate gear A16 for transmitting the driving force from the power receiving member A14 to the counting assembly A15. The counting assembly A15 includes a counting part A151 and a resetting device combined with the counting part A151. The resetting device is used to restore the counting part A151 to the initial position to start counting after the counting part A151 completes counting. The elastic piece A152 combined with the piece A151 is used to provide the initial force required for resetting to the counting piece A151 along the circumferential direction of the counting piece A151. After the elastic piece A152 exerts a force on the counting piece A151, the resetting action The rod A153 again exerts a resetting force on the counting piece A151, and finally the counting piece A151 is reset.

As shown in FIGS. 14A and 14B, the counter member A151 is rotatable about the rotation axis L2, and includes a cylindrical body A151a, a power receiving portion A151b and a non-power receiving portion A151c arranged in the circumferential direction of the cylindrical body A151a, and a rotation axis L2 from The toggle protrusion A151f protruding from the cylinder A151a; preferably, the power receiving portion A151b is a toothed portion in the circumferential direction of the cylinder A151a, and the non-power receiving portion A151c is a toothless portion in the circumferential direction of the cylinder A151a.

Further, a plurality of supporting parts A151d and blocking parts A151e are further provided in the circumferential direction of the cylinder A151a. As shown in the figure, the supporting parts A151d and the blocking parts A151e are both protrusions protruding from the circumferential surface of the cylinder A151a, and The protruding height of the supporting portion A151d is smaller than the protruding height of the blocking portion A151e, and the supporting portion A151d is used to abut the end cover A13, so that the counting member A151 is positioned between the housing A11 and the end cover A13. The supporting portion A151d and the cylindrical body A151a are integrally formed, which can effectively reduce the manufacturing cost of the counting piece A151 and the supporting portion A151d. At the same time, the supporting portion A151d is set to have a smaller protrusion height than the blocking portion A151e, and the supporting portion A151d can also be blocked. A151e protects to prevent the support part A151d from breaking due to the falling of the counting piece A151; since the blocking part A151e needs to interact with the reset lever A153, the blocking part A151e is set to a larger protrusion height, which helps to reduce the movement stroke of the reset lever A153, thereby Reduce the structure and material requirements of the reset rod A153, which will be described below.

After the counting is completed, the counting member A151 is disengaged from the intermediate gear A16, and the blocking portion A151e is restricted by the resetting lever A153; when the developing cartridge A10 is taken out, the elastic member A152 applies one to the counting member A151 in the circumferential direction of the counting member A151 With the initial force, the counting member A151 rotates a certain angle (the first angle), so that the blocking part A151e is opposite to the resetting lever A153; when the developing cartridge A10 is installed again, the resetting lever A153 receives the external force and moves towards the blocking part. A151e exerts a resetting force, the counting piece A151 again rotates a certain angle (a second angle), and finally the counting piece A151 meshes with the intermediate gear A16 to complete the reset.

As shown in FIGS. 15A and 15B, the end cap A13 includes a first through hole A131 and a second through hole A132 provided therein, and the power receiving member A14 and the counter member A151 pass through the first through hole A131 and the second through hole A132, respectively. Further, the end cap A13 of this embodiment further includes a limiting plate A133 and a third through hole A134, the limiting plate A133 is arranged in the circumferential direction of the second through hole A132, and the third through hole A134 is along the second through hole A133 is arranged on the circumference, and the reset lever A153 is arranged in the third through hole A134; the limit plate A133 is used to abut the support portion A151d, preferably along the vertical direction (up and down direction) of the developing cartridge A10, The three through hole A134 is located below the second through hole A132. When the developing cartridge A10 is mounted to the drum assembly A20, the third through hole A134 is closer to the drum assembly A20 than the second through hole A132. When the reset lever A153 in A134 receives an external force, it moves roughly along the straight line of the vertical direction of the developing cartridge.

The reset lever A153 includes a deformable base A1531 (first end) formed in the third through hole A134, an abutment portion A1532 provided on the base A1531, and a force application portion A1533 (second end), wherein the base The A1531 is arranged in the third through hole A134 in the form of a cantilever, and the entire reset lever A153 can be protected by the end cover. The abutting portion A1532 is used to receive an external force, and the urging portion A1533 is used to block or push the blocking portion A151e. Preferably, the abutting portion A1532 and the urging portion A1533 are provided at the free end of the base A1531, When the part A1532 is not subjected to an external force, at least a part of the force application part A1533 is located in the second through hole A132; when the contact part A1532 is subjected to an external force, the base part A1531 is elastically deformed, and the force application part A1533 can The displacement occurs when the base portion A1531 and the end cover A13 rotate as the axis. Since the displacement of the force applying portion A1533 is small, the rotational movement of the force applying portion A1533 can be regarded as being in the vertical direction of the developing cartridge. Linear motion.

Similarly, in order to enable the counting element A151 to be reset faster, similar to the above-mentioned embodiment, the force applying portion A1533 in this embodiment is also located below the center of the second through hole A132, and the force applying portion A1533 is located at the second The center of the through hole is in front of or the center is in front of the projection point below the end cap A13.

[Counting and resetting process of counting components]

Figure 16A is a schematic diagram of the relative positions of the reset lever and the counter member before the developer cartridge in the second embodiment of the present invention is installed; Figure 16B is the component of the counter assembly before the developer cartridge in the second embodiment of the present invention is installed Figure 17A is a schematic diagram of the relative position of the reset lever and the counting member after the developing cartridge involved in the second embodiment of the present invention is installed and counting; Figure 17B is the developing cartridge involved in the second embodiment of the present invention After installation and counting, the positions of the components of the counting assembly are shown.

As shown in the figure, before the developing cartridge A10 is mounted to the drum assembly A20, the abutting portion A1532 is located outside the second through hole A132, the blocking portion A151e is not opposed to the force applying portion A1533, and the toothed portion A151b of the counter member A151 is The intermediate gear A16 is engaged. At this time, along the front and rear direction of the developing cartridge A10, the blocking portion A151e is located behind the force applying portion A1533; when the developing cartridge A10 is mounted to the drum assembly A20 and the power receiver A14 receives the driving force, The force portion A1533 does not interfere with the blocking portion A151e following the rotation of the counting piece A151, the counting piece A151 rotates in the direction indicated by r and starts counting. At this time, the abutting portion A1532 abuts against the first plate A21 of the drum assembly A20, The force applying part A1533 moves in the second through hole A132 in a direction substantially parallel to the vertical direction; when the counting part A151 completes counting, the toothless part A151c of the counting part A151 faces the intermediate gear A16, even if the power receiving part A14 continues Receiving the driving force from the outside, the counting member A151 does not continue to rotate. At this time, as shown in FIG. 17A, along the front and rear direction of the developing cartridge A10, the blocking portion A151e reaches the front of the urging portion A1533, and the blocking portion A151e is urged Block A1533.

When the developing cartridge A10 is taken out of the drum assembly A20, the abutting portion A1532 is no longer abutted by the first plate A21 of the drum assembly and returns to the state outside the second through hole A132, and at the same time, the urging portion A1533 is no longer abutted. Block the blocking part A151e, under the elastic force of the elastic part A152, the counting part A151 rotates a first angle in the direction indicated by r, so that the blocking part A151e is opposite to the force applying part A1533. At this time, the counting part A151 has teeth Part A151b is still not engaged with the intermediate gear A16; when the developing cartridge A10 is mounted to the drum assembly A20 again, under the action of the first plate A21 of the drum assembly, the abutting part A1532 drives the urging part A1533 to be approximately vertical to the developing cartridge Move into the second through hole A132 in a direction parallel to the direction, the force applying portion A1533 applies a reset force to the blocking portion A151e, and the counter piece A151 continues to rotate in the direction indicated by r by a second angle. At this time, the counter piece A151 has teeth The portion A151b meshes with the intermediate gear A16. Once the power receiving member A14 starts to rotate, the counting member A151 can be driven by the intermediate gear A16 to start to rotate in the direction indicated by r to complete the counting.

As mentioned above, the reset rod A153 is set in the third through hole A134 of the end cover A13. Preferably, the reset rod A153 and the end cover A13 are formed integrally, and the materials used for both are the same. Generally, they are made of the material of the end cover A13. The cantilever-shaped reset rod A153 can produce a certain amount of elastic deformation. However, compared with elastic parts such as springs and tension springs, the cantilever-shaped reset rod A153 of the present invention has a smaller amount of elastic deformation. This defect of the rod A153, the blocking part A151e used to be combined with it is set to a higher protrusion height. Even if the elastic deformation of the reset rod A153 is small, it can cooperate with the blocking part A151e to complete the predetermined action. On the other hand, if If the protrusion height of the blocking part A151e is not enough, the movement of the cantilever-shaped reset rod A153 will not trigger the movement of the blocking part A151e. At this time, the reset rod A153 can only be redesigned. The common way is to change the material of the base A1531 so that the base A1531 can be used. A greater amount of elastic deformation is produced. Obviously, when the material of the base A1531 is different from that of the end cap A13, the integrated formation of the end cap A13 and the reset rod A153 will not be realized, and the overall structure of the reset rod A153 will also be complicated. Conducive to reducing the overall cost of the processing box.

The above two embodiments describe in detail two different resetting device structures. In summary, in the first embodiment, the resetting device for forcing the counter element 72 to reset includes a reset lever 35 and a compression spring 71, wherein the compression spring 72 runs along the developing The left and right directions of the box apply a urging force to the counting member 72; after the counting of the counting assembly 7 is completed, the compression spring 72 is compressed, and the missing tooth portion 725 of the counting member 72 is opposed to the driving member 11. Since the reset rod 35 blocks the counting member 72, Even if the compression spring 72 exerts a urging force on the counter member 72 at this time, the counter member 72 still cannot rotate; once the developing cartridge 100 is taken out, the reset lever 35 no longer blocks the counter member 72. Under the urging force of the compression spring 72, The counting member 72 rotates a first angle, but the counting member 72 has not been reset, that is, the counting member 72 has not yet started to engage with the driving member 11. At this time, even if the driving member 11 rotates, the counting member 72 will not rotate; when the developing cartridge 100 is When it is installed again, the reset lever 35 begins to be elastically deformed under the action of an external force, thereby forcing the counting member 72 to continue to rotate by a second angle so that the counting member 72 starts to engage with the driving member 11, and finally, the counting member 72 is reset.

In the second embodiment, the resetting device for forcing the counter element A151 to reset includes a reset lever A153 and an elastic element A152, wherein the elastic element A152 is a torsion spring that applies a urging force to the counter element A151 along the circumferential direction of the counter element A151; After the component A15 counts, the toothless part A151c of the counter piece A151 faces the intermediate gear (drive gear) A16. Even if the torsion spring A152 exerts a force on the counter piece A151, the counter piece A151 restricted by the reset lever A153 cannot rotate; Once the developing cartridge A10 is taken out, the reset lever A153 no longer blocks the counter piece A151. Under the action of the torsion spring A152, the counter piece A151 rotates a first angle, but the counter piece A151 still does not mesh with the intermediate gear A16; when the developing cartridge A10 When being installed again, the reset lever A153 begins to receive an external force to elastically deform, thereby forcing the counting element A151 to continue to rotate a second angle so that the counting element A151 starts to mesh with the intermediate gear A16, and finally, the counting element A151 is reset.

It can be seen from the above description that the compression spring 71 in the first embodiment and the torsion spring A152 in the second embodiment are both used to apply a force to the counter member when the developing cartridge is taken out, forcing the counter member to rotate at a first angle. When being installed again, both the reset lever 35 in the first embodiment and the reset action lever A153 in the second embodiment are elastically deformed when subjected to an external force, thereby forcing the counter to continue to rotate the second angle so that the counter is reset. The compression spring 71 and the torsion spring A152 can be collectively referred to as a force application member, and the reset rod 35 and the reset action rod A153 can be collectively referred to as a reset member, that is, the reset device includes an application member that can apply force to the counting member. The force member and the reset member. After the counting of the counter member is completed, the counter member is restricted by the reset member and cannot be rotated. When the developing cartridge is taken out, the force member applies a force to the counter member to force the counter member to rotate by a first angle. Applying force to the counting element, when the developing cartridge is installed again, the resetting element exerts a force on the counting element to force the counting element to continue to rotate a second angle, the force applying element does not apply force to the counting element, and finally the counting element is reset. It can be seen that the force applying member and the resetting member do not apply force to the counting member at the same time, and the sum of the first angle and the second angle is not less than the angle corresponding to the missing tooth part (no tooth part). The developing cartridge is automatically reset by the reset device, without manual operation by the end user, and the use experience of the end user is improved.

[Improvement of counting pieces]

As mentioned above, in order to make the counting piece no longer mesh with the driving gear after the counting is completed, the counting piece is provided with a toothless part. When the design and manufacturing of the counting piece result in an excessively large toothless area due to accuracy errors, the counting may result The toothed part of the piece cannot mesh with the drive gear and cannot rotate.

Fig. 18A is a perspective view of the improved counter piece related to the present invention; Fig. 18B is a top view of the improved counter piece related to the present invention; Fig. 18C is a side view of the improved counter piece related to the present invention.

The counting member A5 includes a rotating body A51, a base plate A52 provided at one end of the rotating body A51, a protrusion A53 protruding from the base plate A52 away from the rotating body A51, an acted part A54 provided on the protrusion A53, and a peripheral surface of the rotating body A51. The first tooth portion A55 and the second tooth portion A56, and the missing tooth portion A57 opposite to the second tooth portion A56 along the rotation axis L; wherein, along the circumference of the rotating body, the first tooth portion A55 and the second tooth portion A56 encloses to form a complete circle. Along the rotation axis L, the first tooth portion A55 is longer than the second tooth portion A56. The difference between the two forms the missing tooth portion A57, that is, along the rotation axis L, The sum of the length of the second tooth portion A56 and the length of the missing tooth portion A57 is equal to the length of the first tooth portion A55; along the radial direction of the rotating body A51, the maximum size of the base plate A52 is the same as the first tooth portion A55 and the second tooth portion The maximum size of the A56 is equal. Therefore, the base plate A52 can protect the first tooth portion A55 and the second tooth portion A56 from external wear, and can also avoid interference with the rotation of the counter A5.

The protrusion A53 is used for coupling and disassociating with the counted piece. Along the rotation direction r, the protrusion A53 has a first end A53a and a second end A53b, and the toothless portion A57 has a first edge A57a and a second edge A57b. The protrusion A53 At least a part of is located in the range of the missing tooth portion A57, as shown in Figure 18C, the first end A53a is located between the first edge A57a and the second edge A57b, the overlap between the two is h, that is, the protrusion A53 is The arrangement is as close as possible to the missing tooth part A57, which is more conducive to the action of the external acting part and the acted part A54, so as to control the counting part A5 to realize automatic reset.

18A and 18B, the acted part A54 is provided on the radially outer side of the protrusion A53 for being acted on by the external acting part, including the acted surface A54a located on the upstream side and the holding surface A54b located on the downstream side, as the counter piece A5 When the counting is completed, the missing tooth part A57 faces the drive gear, and at the same time, the external action part faces the holding surface A54; when the developing cartridge is taken out, the external action part no longer faces the holding face A54, and the counting part A5 is in the forced position of the reset part. Push down and rotate the first angle. Once the developing cartridge is installed to the predetermined position again, the external acting part faces the acting surface A54a and applies a urging force to the acting surface A54a, forcing the counter member A5 to rotate again by the second angle, finally making the first A tooth portion A55 meshes with the drive gear A62; in the present invention, even if the missing tooth portion A57 is set to be larger, after the counting member A5 rotates again, the first tooth portion A55 still does not mesh with the drive gear, because the second tooth portion A56 The second tooth portion A56 can mesh with the driving gear, so as to ensure that the counting element A5 can be reset.

Set the rotation center of the rotating body A51 to M and the arc center of the protrusion A53 to N. Along the rotation direction r, the acted part A54 is not set at the position corresponding to the point N, but is set downstream of the line MN The reason for this arrangement is that the external acting part is arranged below the developing cartridge shown, and when the missing tooth part A57 is opposed to the drive gear A62, the counting member A5 is just in the state shown in Figure 18B, that is, it is acting The part A54 is also located below the developing cartridge. Furthermore, the acting part and the acting part A54 act below the developing cartridge, that is, the action of the acting part and the acting part A54 is realized by the action of installing the developing cartridge, which can ensure the stable combination of the two .

As described above, since the counting member A5 is provided with the second tooth portion A56, when the developing cartridge is installed to a predetermined position again, the second tooth portion A56 meshes with the driving gear A62, thereby ensuring that the counting member A5 is reset.

Claims

Automatically resettable developing cartridge, the developing cartridge is detachably installed in the equipment provided with the counted part, including a housing, a power receiving part and a counting part installed at the longitudinal end of the housing, and an end installed on the same side as the counting part Cover, the power receiving member is used to receive the driving force from the device and drive the counting member to rotate so that the counting member is combined with the counted member, characterized in that:

The developing cartridge also includes a resetting device for automatically resetting the counting part when the developing cartridge is taken out of the equipment and being installed in the equipment again; the resetting device includes a force applying part and a resetting part that can apply force to the counting part ；

The end cover includes an end cover body and a perforation provided on the end cover body, and the counting piece is exposed through the perforation;

The reset member is arranged on the end cover, the first end of which is connected with the end cover body, and the second end is used to apply force to the counting member;

Along the up and down direction of the developing cartridge, the second end of the resetting member is located below the center of the perforation, and along the front and rear direction of the developing cartridge, the second end of the resetting member is located in front of the center of the perforation or in front of the projection point below the end cover.
The developing cartridge capable of being automatically reset according to claim 1, wherein the force applying member and the resetting member do not simultaneously apply force to the counting member.
The automatic resetable developing cartridge according to claim 1, wherein when the developing cartridge is taken out, the urging member applies a force to the counter member to force the counter member to rotate by a first angle, and when the developing cartridge is installed again, it resets The element exerts a force on the counting element to force the counting element to continue rotating by a second angle.
The developing cartridge capable of being automatically reset according to claim 1, wherein after the counting is completed, the counting member is blocked by the resetting member and cannot be rotated.
2. The automatically resetable developing cartridge according to claim 1, wherein the resetting member is arranged along the circumferential direction of the perforation.
The automatically resetable developing cartridge according to claim 1, wherein the resetting member protrudes from the end cover body in a cantilever manner, the first end is a deformable part connected with the end cover body, and the second end is The acting part arranged on the deformable part acts with the counting element, and the deformable part is used to provide force for the resetting of the acting part.
The automatically resetable developing cartridge according to any one of claims 1 to 6, wherein the urging member is a compression spring for applying a force to the counter member in the left and right directions of the developing cartridge.
7. The automatically resetable developing cartridge according to claim 7, wherein the counter includes a rotating body, an edge protruding radially outward from one end of the rotating body, and the counter rotates away from the edge along the axis of rotation of the counter. When the counting protrusion protruding from the body and the acted part provided on the radially outer side of the counting protrusion, the actuating part applies a force to the acted part when the counter is reset.
The automatically resetable developing cartridge according to any one of claims 1 to 6, wherein the force applying member is a torsion spring that applies force to the counting member along the circumferential direction of the counting member.
According to the automatically resetable developing cartridge of claim 9, the end cover further comprises a third through hole arranged along the circumference of the perforation, and the resetting lever is arranged in the third through hole.
The developing cartridge capable of being automatically reset according to claim 10, wherein the resetting member further comprises an abutting portion provided therein, and when the abutting portion is not subjected to external force, at least a part of the second end of the resetting member is located at Inside the perforation.
The automatically resetable developing cartridge according to claim 1, wherein the housing includes a lower housing and an upper housing that are combined with each other, and the upper housing includes a face cover extending in the front-rear direction and the left-right direction. The supporting body extending in the vertical direction and intersecting the face cover in the up and down direction and the joined part arranged at the end of the supporting body in the left and right direction. The lower housing is provided with a joining part that is joined to the joined part. When the upper housing or the lower housing When a force is applied in the up and down direction, a force in the left and right direction is generated at the junction of the coupling part and the other coupling part, which forces the coupling part and the coupled part to be coupled in the left and right direction.
11. The self-resetting developing cartridge according to claim 12, wherein the position of the coupling part and the coupled part is not located at the longitudinal end of the housing.
The self-resetting developing cartridge according to claim 13, wherein the supporting body comprises a first part and a second part connected to each other, wherein the first part is closer to the face cover than the second part, and the second part is substantially It is trapezoidal.
The self-resetting developing cartridge according to claim 14, wherein the joined part includes a first joining surface formed in front of the first part and a second joining surface formed in the left-right direction of the second part, the Both the first coupling surface and the second coupling surface are coupled with the coupling portion.
The self-resetting developing cartridge according to claim 15, wherein the first joining surface is parallel to the left-right direction, and the second joining surface is neither perpendicular to the left-right direction nor parallel to the front-rear direction.
16. The automatically resettable developing cartridge according to claim 16, wherein the second coupling surface is inclined to the left or right with respect to the front-to-rear direction.