CN113467207A

CN113467207A - Developing box

Info

Publication number: CN113467207A
Application number: CN202110903071.2A
Authority: CN
Inventors: 唐良春; 刘洪芳; 吕金波
Original assignee: Zhuhai Yuancheng Digital Technology Co ltd
Current assignee: Zhuhai Yuancheng Digital Technology Co ltd
Priority date: 2021-08-06
Filing date: 2021-08-06
Publication date: 2021-10-01
Also published as: WO2023010702A1

Abstract

The invention relates to a developing box which comprises a shell, a transmission assembly and a counting mechanism, wherein the transmission assembly and the counting mechanism are arranged at the end part of the developing box, and the transmission assembly receives driving force from a printer and drives the counting mechanism to work. The counting mechanism comprises a counting moving piece, a guide piece, an elastic piece, an actuating device and a limiting mechanism, wherein a trigger rod for touching a detection mechanism of the printer is arranged on the counting moving piece; the guide piece is used for controlling the counting moving piece to move according to a preset path under the condition that the counting moving piece is stressed; an elastic member provided between the housing of the developing cartridge and the counting moving member to apply an elastic force to the counting moving member; the actuating device is used for forcing the counting moving piece to move along different paths in sequence; the limiting mechanism is used for keeping the counting moving piece at a fixed position after the counting moving piece moves to a preset position. The counting moving piece can drive the trigger rod to horizontally move to contact or separate from the detection mechanism of the printer when moving, so that the counting function is realized.

Description

Developing box

Technical Field

The present invention relates to a developing cartridge. And in particular, to a developing cartridge detachably mountable to a laser printer.

Background

The developing cartridge is an indispensable printing consumable in a laser printer. After the laser printer works for a period of time, the carbon powder filled in the developing box is used up, and at this time, a new developing box needs to be replaced.

For some types of developing cartridges, manufacturers often provide a counting mechanism on the developing cartridge, which can be used in cooperation with a detection device on the printer to indicate to the printer whether the developing cartridge is a new developing cartridge, and then to restart calculating the service life of the developing cartridge.

Chinese patent No. 200610055011.5 discloses a developing cartridge which can be detachably mounted to a printer. Such a developing cartridge includes a casing and a gear mechanism at an end of the casing for driving respective rotary bodies, such as a developing roller, an agitating frame, or a powder feeding roller, mounted in the casing. The gear mechanism further includes an input gear, a transfer gear, and an intermediate gear. A moving part is arranged at the end part of the intermediate gear, and the moving part can rotate around the rotating shaft of the moving part under the condition of stress. Meanwhile, a detection mechanism is arranged on the printer, and when the moving part touches the detection mechanism on the printer, the printer can detect the use state of the developing box. The developer cartridge includes a casing, a movable member, a blocking portion provided at an end of the casing, the blocking portion being disposed downstream in a rotational direction of the movable member, the blocking portion being configured to urge the movable member to rotate when the movable member is rotated to a position of the blocking portion for the first time. Since the moving member is rotated so as to avoid the interference portion, the interference portion does not contact the detection mechanism when the moving member is rotated to the interference portion position for the second time. In this way, the printer can detect whether the developing cartridge mounted to the printer is a new cartridge or an old cartridge.

Chinese patent No. 201420859164.5 discloses a developing cartridge comprising a cartridge body, a gear, a rotary member, a detecting member, and a biasing member, wherein the gear is disposed outside one end wall of the cartridge body; the rotating part is arranged on the outer side of the end wall and comprises a clutch wheel which is provided with a small-diameter part in clearance fit with the tooth tops of the gears and a large-diameter part in interference fit with the tooth tops of the gears, the large-diameter part is circumferentially provided with an elastic friction layer, and one side of the clutch wheel, which is far away from the box body, is provided with a push block which deviates from a central shaft of the rotating part and protrudes along the axial direction; the push block can push the detection piece to move. The gear is provided with a coaxial cylindrical member having an open slot, and the rotating member is provided with a projection radially offset from its axis of rotation and abuttable against the cylindrical member. The biasing member applies a biasing force to the rotary member to bring the cam into contact with the cylindrical member under pressure, while the large diameter portion is not in contact with the gear. This kind of counting mechanism of the developing cartridge detects whether the developing cartridge mounted to the printer is a new cartridge or an old cartridge by pushing a detecting member to move horizontally and laterally by a push block provided on a rotating member.

Disclosure of Invention

The invention aims to provide a developing box, wherein the counting mechanism of the developing box adopts a completely different working principle from the existing counting mechanism, and enriches the selectable scope of the counting mechanism.

In order to achieve the purpose, the developing box comprises a shell, a transmission assembly and a counting mechanism, wherein the transmission assembly and the counting mechanism are arranged at the end part of the developing box, the transmission assembly receives driving force from a printer and drives the counting mechanism to work, and the transmission assembly comprises a stirring frame gear. The counting mechanism further comprises a counting moving piece, a guide piece, an elastic piece, a first actuating protrusion, a second actuating protrusion and a limiting mechanism; a trigger rod for touching a detection mechanism of the printer is arranged on the counting moving part; the guide piece is used for controlling the counting moving piece to move according to a preset path under the condition that the counting moving piece is stressed; one end of the elastic piece is arranged on the developing box, and the other end of the elastic piece is arranged on the counting movable piece; the first actuating protrusion is used for forcing the counting movable piece to rotate, the second actuating protrusion is used for forcing the counting movable piece to move, the first actuating protrusion and the second actuating protrusion are installed on the stirring frame gear, and the first actuating protrusion contacts the counting movable piece before the second actuating protrusion; the limiting mechanism is used for keeping the counting moving member at a fixed position after the counting moving member moves to a preset position. When moving, the counting moving part can drive the trigger rod to horizontally move so as to contact or separate from a detection mechanism of the printer, and therefore the counting function is achieved.

Compared with the existing counting mechanism, the counting mechanism of the developing box adopts completely different structures and working principles, and provides more solutions for the selection of the counting mechanism in the prior art.

In one embodiment, the counting movable member is provided with a guide projection, and the guide member is a guide groove, and the guide projection extends into the guide groove to control the counting movable member to move along the profile of the guide groove.

In a preferred embodiment, a limit step is arranged in the guide groove and used for limiting the counting movable piece to return to an initial position when the counting movable piece moves. Through setting up spacing step, can reduce the design and the overall arrangement degree of difficulty of first actuating protrusion, second actuating protrusion and receiving structures such as face.

In one embodiment, the developing cartridge includes an end cap, and the guide groove is provided at a side of the end cap adjacent to the driving assembly.

In one embodiment, the end cap includes an oblong opening through which the trigger rod passes at least partially outside the end cap; the trigger rod can move between a first position and a second position, and when the trigger rod is located at the first position, the trigger rod is separated from a detection mechanism of the printer; when the trigger lever is located at the second position, the trigger lever contacts a detection mechanism of the printer.

In one embodiment, an arc-shaped pressure-receiving surface is arranged on the counting moving part, and the first actuating protrusion is in contact with the arc-shaped pressure-receiving surface when being driven by the stirring frame gear to move, so that the counting moving part is driven to rotate.

In a preferred embodiment, the second actuating protrusion is closer to the center of the agitator gear than the first actuating protrusion, so that the first actuating protrusion contacts the counter movable member before the second actuating protrusion by simply arranging the second actuating protrusion and the first actuating protrusion.

In one embodiment, the limiting mechanism comprises a limiting hook and a limiting surface, the limiting hook is arranged on the counting moving part, the limiting surface is located on the end cover, and the limiting hook can slide along the limiting surface to drive the counting moving part to move. The limiting mechanism with the structure not only can keep the counting moving piece at a fixed position to avoid the counting moving piece from contacting with the actuating protrusion on the gear of the stirring frame, but also can realize the resetting of the counting mechanism by moving the limiting hook. After the reset developing cartridge is loaded into the printer, the printer treats the filled developing cartridge as a new developing cartridge.

In a preferred embodiment, the gear of the stirring frame is further provided with a limiting block, and the limiting block is used for limiting the position of the counting movable member in the initial state of the developing box. The limiting block can limit the downward moving range of the counting moving part, when the stirring frame gear starts to rotate from the initial position, the first actuating protrusion contacts with the counting moving part, and the second actuating protrusion does not contact with the counting moving part.

The invention also provides another developing box which comprises a shell, a transmission component and a counting mechanism, wherein the transmission component and the counting mechanism are arranged at the end part of the developing box, and the transmission component receives the driving force from the printer and drives the counting mechanism to work. The counting mechanism comprises a counting moving part, a guide groove with a triangular outline, an elastic piece, an actuating device and a limiting mechanism, and a trigger rod for touching a detection mechanism of the printer is arranged on the counting moving part; at least one part of the counting movable piece extends into the guide groove; the elastic member is disposed between the developing cartridge and the count movable member; the actuating device is used for forcing the counting movable piece to move along the triangular contour of the guide groove; the limiting mechanism is used for keeping the counting moving member at a fixed position after the counting moving member moves to a preset position. When moving, the counting moving part can drive the trigger rod to horizontally move so as to contact or separate from a detection mechanism of the printer, and therefore the counting function is achieved.

The invention also relates to another developing box which comprises a shell, a transmission component and a counting mechanism, wherein the transmission component and the counting mechanism are arranged at the end part of the developing box, and the transmission component receives the driving force from a printer and drives the counting mechanism to work. The counting mechanism includes: the printer comprises a counting moving piece, a guide piece, an elastic piece, an actuating device and a limiting mechanism, wherein a trigger rod used for touching a detection mechanism of the printer is arranged on the counting moving piece; the guide piece is used for controlling the counting moving piece to move according to a preset path under the condition that the counting moving piece is stressed; the elastic member is disposed between the housing of the developing cartridge and the counting moving member to apply an elastic force to the counting moving member; the actuating device is used for forcing the counting moving piece to move along different paths in sequence; the limiting mechanism is used for keeping the counting moving piece at a fixed position after the counting moving piece moves to a preset position. When moving, the counting moving piece can drive the trigger rod to horizontally move so as to contact or separate from a detection mechanism of the printer, and therefore the counting function is achieved.

Drawings

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

Fig. 2A is a front view of an end cap of the developing cartridge shown in fig. 1 including a counting mechanism.

Fig. 2B is a rear perspective view of the end cap of the developing cartridge shown in fig. 2A.

Fig. 3A is a structural perspective view of a counting mechanism of the developing cartridge of the present invention.

Fig. 3B is a perspective view showing an inner structure of an end cap of the developing cartridge shown in fig. 3A.

Fig. 4A is a perspective view of the counting movable member of the counting mechanism of the developing cartridge of the present invention.

FIG. 4B is a rear view of the counting movement of the counting mechanism shown in FIG. 4A.

Fig. 5A is a perspective view of the counter moving member of the counter mechanism of the developing cartridge of the present invention in cooperation with the gear of the agitator frame.

Fig. 5B is a perspective view of the counting moving member of the counting mechanism shown in fig. 5A at another angle in cooperation with the gear of the stirring frame.

Fig. 6A is a perspective view showing the structure of the upper end of the end cap of the developing cartridge of the present invention.

Fig. 6B is a perspective view of the position restricting mechanism of the counting mechanism of the developing cartridge of the present invention.

Fig. 7 is a schematic view showing a moving path of the counting movable member of the counting mechanism of the developing cartridge of the present invention in the guide groove.

Fig. 8A to 8C are the fitting process of the actuating device and the counting movable member of the counting mechanism of the developing cartridge of the present invention.

Fig. 9A to 9C are schematic views showing the operation of the position restricting mechanism including the counting mechanism of the developing cartridge of the present invention.

Detailed Description

The structure and other aspects of the process cartridge of the present invention will be described in further detail hereinafter with reference to the accompanying drawings by way of specific embodiments.

As shown in fig. 1 and fig. 2A-2B, the developing cartridge of the present invention comprises a casing 1, a transmission assembly 2 and a rotatable member 5, wherein the casing 1 comprises side walls at two sides and a cavity formed therein for accommodating the rotatable member or toner (developer); the rotatable member 5 includes, for example, a developing roller, a powder feeding roller, an agitating frame, or the like, and both ends of the rotatable member 5 are rotatably mounted on both side walls of the casing 1; a transmission assembly 2 is mounted at one end of the housing 1, the transmission assembly 2 generally includes a driving force input gear 20, an agitating frame gear 21, a developing roller gear 22 and other gears, and the developing roller gear 22 and the agitating frame gear 21 are respectively mounted coaxially with the developing roller and the agitating frame to respectively drive the developing roller and the agitating frame to work. According to different models of the developing boxes, the gear system of the transmission assembly can be adjusted or arranged according to actual requirements. The developing cartridge of the present invention can be detachably mounted in a printer (electronic image forming apparatus) to cooperate with other structures in the printer, thereby forming an image on a sheet (printing medium).

The developing cartridge of the present invention further includes a counting mechanism 3 and an end cap 4, the counting mechanism 3 being used to trigger a detection mechanism in the printer to indicate to the printer status information of the mounted developing cartridge, such as whether the mounted developing cartridge is a new or an old developing cartridge that has been used. The counting mechanism 3 and the transmission assembly 2 may be mounted on the end cap 4.

As shown in fig. 3A and 3B, in the developing cartridge of the present invention, the counting mechanism 3 includes a counting movable member 31, a guide member 32, an actuating device 33, a position limiting mechanism 34, and an elastic member 35, wherein the counting movable member 31 is used for touching a detection mechanism of the printer to indicate status information of the mounted developing cartridge to the printer; the guide piece 32 is used for controlling the counting movable piece 31 to move according to a preset path when the counting movable piece 31 is stressed; the actuating device 33 is used to push the counting movable element 31 to move along different paths in sequence, for example, the actuating device 33 can push the counting movable element 31 to rotate around the trigger rod 312 and can also push the counting movable element 31 to translate; the limit mechanism 34 is used to keep the counting moving member 31 in a fixed position after the counting moving member 31 moves to a predetermined position, and the structure and operation of the mechanism will be described in detail below.

Fig. 4A-4B are schematic views of the counting movable member of the counting mechanism of the developing cartridge of the present invention. In one embodiment, the counting mover 31 includes a counting mover body 311, a trigger lever 312 and a guide protrusion 313 provided on one side of the counting mover body 311, and an arc-shaped pressure receiving surface 314 provided on the other side of the counting mover body 311. The trigger lever 312 is used to contact a detection mechanism on the printer to send detection information to the printer. The end cap 4 is provided with an elongated opening 41, and the trigger lever 312 is exposed to the outside of the end cap 4 after passing through the opening 41, so as to trigger the detection mechanism after the developing cartridge is loaded into the printer. When the counting movable member 31 moves, the trigger rod 312 is driven to move left and right along the opening 41. The counting movable member 31 is further provided with a first clamping portion 316 for mounting the elastic member 35, and the structure or function of the first clamping portion 316 will be described in detail below.

In a particular embodiment, the guide 32 may be provided as a guide groove, and the guide groove 32 may be provided inside the end cap 4. At least a part of the counting mover 31 protrudes into the guide groove 32, and specifically, the guide protrusion 313 of the counting mover 31 protrudes into the guide groove 32. The movement path of the counting mover 31 is controlled by the guide groove 32 when the counting mover 31 is stressed. In a preferred embodiment, the guide groove 23 has a triangular profile, and three corner positions of the triangular profile are rounded to form a smooth transition in order to facilitate the movement of the guide protrusion 313 in the guide groove 32.

In another preferred embodiment, a limiting step 321 is disposed in the guiding groove 32, as shown in fig. 3B, when the guiding protrusion 313 moves in the guiding groove 32, the guiding protrusion 313 moves downward after passing through the limiting step 321, and then the limiting step 321 contacts the cylindrical surface of the guiding protrusion 313 to limit the counting movable element 31 from returning to the initial position in the opposite direction.

As shown in fig. 5A-5B, in one embodiment, the actuating device 33 is disposed on one side of the agitator frame gear 21, and when the agitator frame gear 21 rotates, the actuating device 33 is driven to move so as to force the counting mover 31 to move. The actuating device 33 further comprises a first actuating protrusion 331 and a second actuating protrusion 332, wherein the first actuating protrusion 331 is adapted to contact the counting mover 31 to force the counting mover 31 to rotate, and the second actuating protrusion 332 is adapted to contact the counting mover 31 to force the counting mover 31 to move in a direction to compress the elastic member 35. Specifically, the first actuation protrusion 331 contacts the pressure receiving surface 314 of the count-moving piece 31 to force the count-moving piece 31 to rotate about the trigger lever 312, and the second actuation protrusion 332 contacts the end surface 318 of the count-moving piece 31 to force the count-moving piece 31 to move in the direction of the elastic member 35 (at which the elastic member is compressed). The first actuating protrusion 331 and the second actuating protrusion 332 are disposed on the same side of the agitator frame gear 21, and their positions on the agitator frame gear 21 are set such that the first actuating protrusion 331 contacts the counter movable piece 31 prior to the second actuating protrusion 332 during rotation of the agitator frame gear 21. Specifically, the second actuating protrusion 332 is closer to the center of the agitator frame gear 21 than the first actuating protrusion 331, so that the first actuating protrusion 331 contacts the counter movable member 31 first when the agitator frame gear 21 rotates.

The actuating device 33 is disposed parallel to the counting mover 31, and when the position of the counting mover 31 is set, in order to ensure that the first rotation of the agitator frame gear 21 is performed, the first actuating protrusion 331 can contact the pressure receiving surface 314 to force the counting mover 31 to rotate around the trigger lever 312, and the second actuating protrusion 332 does not contact the end surface 318 of the counting mover 31, so that the counting mover 31 does not move in the direction of the elastic member 35. Since the first actuating protrusion 331 forces the counting moving member 31 to rotate, so that the end surface 318 of the counting moving member 31 is further close to the second actuating protrusion 332, when the stirring frame gear 21 rotates to the second rotation and the second protrusion 332 rotates to the end surface 318 of the counting moving member 31, the second protrusion 332 contacts the end surface 318 to force the counting moving member 31 to move toward the elastic member 35.

The elastic member 35 is disposed between the developing cartridge and the counting movable member 31, and specifically, a second catching portion 42 is disposed inside the end cap 4 of the developing cartridge, and the second catching portion 42 is opposite to the first catching portion 316. One end of the elastic member 35 is installed on the first catching portion 316, and the other end is installed on the second catching portion 42. The elastic element 35 can exert a certain elastic force on the counting movable element 35 to push the counting movable element 31 to move. In a preferred embodiment, the inner wall of the end cap 4 is provided with a first guide track 43, and when the counting movable member 31 moves under the action of the second actuating protrusion 332, one end of the counting movable member 31 close to the elastic member 35 always moves under the guide of the first guide track 43, so that the counting movable member 31 is ensured to move according to a desired posture or path.

As shown in fig. 6A to 6B, in a specific embodiment, the limit mechanism 34 includes a limit surface 341 and a limit hook 342, the limit surface 341 is disposed at the upper end of the end cap 4, and the limit hook 342 is disposed at the upper end of the count movable member 31. When the counting movable member 31 moves under the elastic force of the elastic member 31, the limit hook 342 can slide along the limit surface 341, thereby guiding the moving path of the counting movable member 31. The limit hook 342 does not contact the limit surface 341 in the initial state, and the limit hook 341 is located at a height lower than the limit surface 341. When the counting movable member 31 moves toward the upper end of the end cap 4 under the action of the second actuating protrusion 332, the limit hook 342 is lifted above the limit surface 341, and the limit hook 342 contacts with the limit surface 341 and slides along the limit surface 341 under the action of the elastic force of the elastic member 31 until the limit hook slides to the tail end of the limit surface 341. The upper end of the end cap 4 may also be provided with a second guide rail 343, and in the ascending process of the counting moving part 31, the limit hook 342 passes through the second guide rail 343 and then contacts with the limit surface 341.

In a preferred embodiment, a stopper rod 345 is provided at an upper end of the counting moving member 343 and at one side of the stopper hook 342, the width of the stopper rod 345 is substantially the same as the width of the second guide rail 343, and the width of the stopper hook 342 is sufficiently smaller than the width of the second guide rail 343, so that the widths of the stopper rod 345 and the stopper hook 342 are advantageous in that, on the one hand, since the stopper rod 345 is restricted by the second guide rail 343, the stopper hook 342 does not shake or separate from the stopper surface 341 while sliding along the stopper surface 341; on the other hand, because the width of the limit hook 342 is sufficiently smaller than the second guide track 343, the limit hook 342 can be sufficiently deformed under the external force, so that the limit hook 342 can be separated from the limit surface 341 under the external force, thereby realizing the reset of the counting mechanism.

In a specific embodiment, a slope 3421 (shown in fig. 4A) is provided on the end surface of the limit hook 342, and the slope 3421 always contacts the edge 3431 (shown in fig. 6A) of the second guide track 343 when the limit hook 342 passes through the second guide track 343, so that the limit hook 342 is slightly deformed. When the height of the limit hook 342 exceeds the edge 3431 of the second guide rail 343, the limit hook 342 is restored from the deformed state to the vertical state, and the limit hook 345 contacts the limit surface 341, and then the limit mechanism 34 starts to function.

Hereinafter, the operation principle and process of the developing cartridge of the present invention, particularly, the operation principle and process of the counting mechanism of the developing cartridge will be described in detail.

When the developing cartridge is in the initial state (i.e., the factory state), the guide protrusion 313 of the counter movable member 31 is located in the guide groove 32 as shown in fig. 7 (a). At this time, the height of the end of the stopper hook 342 is lower than the height of the stopper surface 341, and the stopper hook 342 does not contact the stopper surface 341, that is, the stopper mechanism 34 does not function, as shown in fig. 9C. At the same time, the actuating device 33 is also inactive, i.e. the first actuating projection 331 does not contact the arcuate pressure-receiving surface 314 of the counting movable element 31, and the second actuating projection 332 does not contact the end surface 318 of the counting movable element 31, as in the state shown in fig. 5A. The elastic member 35 is substantially in a stretched state in the initial state.

The user loads the cartridge in the initial state into the printer, and at this time, the trigger lever 312 of the counter movable member 31 is in the first position not contacting the detection mechanism of the printer. After the printer is electrically started, the driving force on the printer is transmitted to the stirring frame gear 21 through the driving force input gear 20 to drive the stirring frame gear 21 to rotate. The actuating device 33 provided on the agitator frame gear 21 starts to drive the counting mover 31 to move. Specifically, when the agitator gear 21 rotates, the first actuating protrusion 331 is brought into contact with the pressure receiving surface 314 of the counting movable member 31 by the agitator gear 21, as shown in fig. 8A. As the first actuating protrusion 331 continues to move along the pressure receiving surface 314, the counter movable member 31 rotates about the trigger lever 312, as shown in fig. 8B. At the same time, the guide protrusion 313 of the counter movable element 31 moves within the guide groove 32 until it moves to the state shown in fig. 7 (b). In the process in which the first actuation protrusion 331 contacts the pressure receiving surface 314 of the counting mover 31, that is, in the process in which the guide protrusion 313 of the counting mover 31 moves from the state shown in fig. 7 (a) to the state shown in fig. 7 (b), the second actuation protrusion 332 does not contact the end surface 318 of the counting mover 31. The elastic member 35 is also substantially in a stretched state.

As the agitator gear 21 continues to rotate, the first actuating protrusion 331 disengages from the pressure receiving surface 314 of the counting mover 31, at which time the second actuating protrusion 332 begins to contact the end surface 318 of the counting mover 31, as shown in fig. 8C. In a preferred embodiment, since the limit step 321 is disposed in the guide groove 32, the guide protrusion 313 generates a descending motion after passing through the limit step 321, and then the limit step 321 contacts the cylindrical surface of the guide protrusion 313 to limit the counter movable element 31 from returning to the initial position in the opposite direction. By providing the limit step 321, even if the first actuation protrusion 331 is separated from the pressure receiving surface 314 of the counting moving member 31 and the second actuation protrusion 332 is not yet contacted with the end surface 318 of the counting moving member 31, the counting moving member 31 will not return to the initial position in the opposite direction, which reduces the design and layout difficulties of the first actuation protrusion 331, the second actuation protrusion 332, the pressure receiving surface 314, and other structures.

When the stirring rack gear 21 further rotates, the second actuating protrusion 332 starts to push the counting movable element 31 to translate towards the elastic element 35 (at this time, the elastic element starts to be compressed) under the driving of the stirring rack gear 21, and the trigger rod 312 of the counting movable element 31 will also move along the elongated opening 41 to trigger the detection mechanism on the printer, i.e. move from the first position of not contacting the detection mechanism to the second position of contacting the detection mechanism. In the process of the second actuation protrusion 332 pushing the counting mover 31 to translate, the guide protrusion 313 of the counting mover 31 moves from the state shown in fig. 7 (b) to the state shown in fig. 7 (c). In this process, the first actuating protrusion 331 does not contact the pressure receiving surface 314 of the counter movable member 31. The elastic member 35 is continuously compressed.

In the process of moving the guide protrusion 313 of the counting movable element 31 from the state shown in fig. 7 (b) to the state shown in fig. 7 (c), when the counting movable element 31 translates along the contour of the guide groove 32, the height of the counting movable element 31 gradually rises, so that the limit hook 342 at the upper end of the counting movable element 31 is gradually lifted above the limit surface 341, and the limit mechanism 34 starts to function, as shown in fig. 9A.

After the guide protrusion 313 of the counting mover 31 moves to the state shown in fig. 7 (c), the second actuating protrusion 332 is disengaged from the end surface 318 of the counting mover 31, the stopper hook 342 contacts the stopper surface 341, the counting mover 31 is translated by the elastic force of the elastic member 35, and the guide protrusion 313 of the counting mover 31 moves from the state shown in fig. 7 (c) to the state shown in fig. 7 (d). At this time, the trigger lever 312 of the counter movable member 31 moves along the elongated opening 41 to be away from the detection mechanism of the printer, i.e., from the second position where it contacts the detection mechanism to the first position where it does not contact the detection mechanism. The moving path of the counting moving piece 31 is controlled by the limit mechanism 34, that is, by the limit hook 342 abutting against the limit surface 341. The limit hook 342 of the counting moving member 31 moves to the tail end of the limit surface 341 and stops moving, and the counting function of the counting mechanism 3 is completed. Thereafter, the actuating device 33 does not contact the counter movable element 31 again during the continued rotation of the agitator frame gear 21.

After the developing box works in the printer for a period of time, the carbon powder in the developing box can be consumed, and a user can take the developing box out of the printer and add the carbon powder into the developing box. The user pulls the limit hook 342 to deform and then separate from the limit surface 341, and presses the upper end of the limit hook 342 to make the height of the limit hook 342 lower than the limit surface 341. The counter movable element 31 is also pressed downward at the same time, and the guide projection 313 of the counter movable element 31 moves from the state shown in fig. 7 (d) to the state shown in fig. 7 (a), and thus the reset of the counter mechanism 3 is realized. After the reset developing box is loaded into the printer, the counting mechanism 3 circulates the working process of the invention, and the printer treats the developing box after powder filling as a new developing box.

In a preferred embodiment, the stirring rack gear 21 is further provided with a limiting block 211, and the limiting block 211 and the first actuating protrusion 331 and the second actuating protrusion 332 can be located on the same side of the stirring rack gear 21. When the guide protrusion 313 of the counting movable member 31 moves from the state shown in fig. 7 (d) to the state shown in fig. 7 (a), the stopper 211 may limit the downward movement range of the counting movable member 31, i.e., ensure that the counting movable member 31 moves to a position where the first actuation protrusion 331 contacts the pressure receiving surface 314 of the counting movable member 31 and the second actuation protrusion 331 does not contact the end surface 318 of the counting movable member 31 when the agitator gear 21 starts rotating from the initial position.

The above embodiments are only for illustrating the concept and scope of the present invention and are not intended to limit the scope of the present invention. Modifications, equivalents and other improvements which are obvious to those skilled in the art are made to the above-described embodiments and are also within the spirit of the invention. The scope and spirit of the invention are defined by the appended claims.

Claims

1. The utility model provides a developing box, includes the casing and sets up developing box tip's drive assembly and counting mechanism, drive assembly receives the drive power and the drive that come from the printer counting mechanism work, drive assembly includes the stirring frame gear, its characterized in that, counting mechanism includes:

the counting moving part is provided with a trigger rod for touching a detection mechanism of the printer;

the guide piece is used for controlling the counting moving piece to move according to a preset path under the condition that the counting moving piece is stressed;

the elastic piece is arranged on the shell of the developing box at one end and on the counting movable piece at the other end so as to apply elastic force to the counting movable piece;

a first actuating protrusion for forcing the counting moving member to rotate;

a second actuating protrusion for forcing the counting movable piece to move, the first and second actuating protrusions being mounted on the agitator frame gear, the first actuating protrusion contacting the counting movable piece prior to the second actuating protrusion; and

the limiting mechanism is used for keeping the counting moving piece at a fixed position after the counting moving piece moves to a preset position;

when moving, the counting moving part can drive the trigger rod to horizontally move so as to contact or separate from a detection mechanism of the printer, and therefore the counting function is achieved.

2. A developing cartridge according to claim 1, wherein a guide projection is provided on the counter movable member, and the guide member is a guide groove into which the guide projection projects to control the movement of the counter movable member along a contour of the guide groove.

3. A developing cartridge according to claim 2, wherein a limit step for limiting the count movable member to return to an initial position when moving is provided in the guide groove.

4. A developing cartridge according to claim 2, wherein said developing cartridge includes an end cap, and said guide groove is provided at a side of said end cap adjacent to said driving member.

5. A cartridge according to claim 2, wherein said end cap includes an oblong opening through which said trigger lever passes at least partially outside said end cap;

the trigger rod can move between a first position and a second position, and when the trigger rod is located at the first position, the trigger rod is separated from a detection mechanism of the printer; when the trigger lever is located at the second position, the trigger lever contacts a detection mechanism of the printer.

6. A developing cartridge according to claim 1, wherein an arc-shaped pressure receiving surface is provided on the count movable member, and the first actuating projection is brought into contact with the arc-shaped pressure receiving surface when moved by the gear of the agitator frame, thereby rotating the count movable member.

7. A developing cartridge according to claim 6, wherein said second actuating projection is closer to a center of said agitator frame gear with respect to said first actuating projection.

8. A developing cartridge according to claim 1, wherein said position restricting mechanism includes a position restricting hook provided on said count movable member and a position restricting surface provided on said end cover, said position restricting hook being slidable along said position restricting surface to thereby move said count movable member.

9. A cartridge according to claim 8, wherein a stopper is further provided on the gear of the agitator frame, the stopper being adapted to restrict the position of the movable member at the initial state of the cartridge.

10. A developing box comprises a shell, a transmission component and a counting mechanism, wherein the transmission component and the counting mechanism are arranged at the end part of the developing box, the transmission component receives driving force from a printer and drives the counting mechanism to work, and the counting mechanism is characterized by comprising:

the counting movable piece is provided with a guide groove with a triangular outline, and at least one part of the counting movable piece extends into the guide groove;

an elastic member provided between the housing of the developing cartridge and the count movable member to apply an elastic force to the count movable member;

actuating means for forcing the counter-movable member to move along the triangular profile of the guide groove; and

11. A developing cartridge according to claim 10, wherein said actuating means includes a first actuating protrusion contactable with said count movable member to urge said count movable member to rotate, and a second actuating protrusion contactable with said count movable member to urge said count movable member to move in a direction to compress the elastic member;

during the rotation of the stirring frame gear, the first actuating protrusion contacts the counting movable piece before the second actuating protrusion.

12. A developing cartridge according to claim 11, wherein an arc-shaped pressure receiving surface is provided on the count movable member, and the first actuating projection is brought into contact with the arc-shaped pressure receiving surface when moved by the gear of the agitator frame, thereby rotating the count movable member.

13. A cartridge according to claim 11, wherein said second actuating projection is closer to a center of said agitator frame gear than said first actuating projection.

14. A developing cartridge according to claim 10, wherein a guide projection is provided on the counter movable member, the guide projection projecting into the guide groove to control the movement of the counter movable member along the triangular contour of the guide groove.

15. A developing cartridge according to claim 14, wherein a limit step for limiting the return of the count movable member to an initial position when the count movable member moves is provided in the guide groove.

16. A cartridge according to claim 10, wherein the transmission assembly includes a gear of an agitator frame, and the actuator is provided at an end of the gear of the agitator frame, and the gear of the agitator frame rotates to move the actuator and thus the counter movable member.

17. A developing cartridge according to claim 10, wherein said position restricting mechanism includes a position restricting hook provided on said count movable member and a position restricting face provided at an upper end of an end cap of the developing cartridge, said position restricting hook being slidable along said position restricting face to move said count movable member.