CN216248773U - Developing box - Google Patents

Abstract

The utility model relates to a developing box which can be detachably installed in a printer, and comprises a shell, an end cover and a counting mechanism, wherein the shell comprises side walls positioned at two sides and a cavity formed in the shell; an end cap is mounted at an end of the housing; the counting mechanism comprises a counting moving part, the counting moving part is arranged between the side wall of the shell and the end cover, and the counting moving part can drive the trigger rod to move so as to contact or separate from the detection mechanism of the printer when moving. The developing box also comprises a telescopic control rod and a reset mechanism, wherein the first end of the telescopic control rod is in contact with the counting movable piece so as to force the counting movable piece to move towards a first direction vertical to the side wall; the reset mechanism can force the counting movable piece to move towards a second direction opposite to the first direction. The end cover has first opening, and the inner structure contact of first opening and printer can be passed to the second end of flexible control lever.

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. 201110077214.5 discloses a process cartridge for an image forming apparatus, which is detachably mountable to the image forming apparatus, the process cartridge comprising: a housing configured to accommodate therein a developer and including a first side wall and a second side wall opposed to the first side wall in a longitudinal direction; a driven unit configured to receive a driving force from the driving unit, disposed on the first sidewall, and rotatable about a first axis parallel to the longitudinal direction; and a detected body that is disposed on the first side wall and includes a detected portion detected by the detection unit. The detected body is advanced outward in the longitudinal direction with respect to the first side wall and retracted inward in the longitudinal direction with respect to the first side wall by the driving force received by the driven unit. In the utility model, due to the particularity of the internal structure of the image forming apparatus, the object to be detected needs to advance outward in the longitudinal direction after being mounted to the image forming apparatus to touch the detection mechanism in the image forming apparatus, and at the same time, the object to be detected needs to retract inward in the longitudinal direction to take out the process cartridge from the image forming apparatus. In order to realize the function, a sliding part is arranged on the first side wall of the processing box, two inclined planes with different directions are arranged on the end surface of the sliding part, and the detected body can slide along the end surface of the sliding part. When the detected body passes through the slope, the detected body rises or falls along the slope, thereby realizing the advance or retraction of the detected body in the longitudinal direction.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a developing box, wherein the telescopic mode of a counting mechanism of the developing box is completely different from the telescopic mode of the existing counting mechanism, and the selectable scope of the counting mechanism is enriched.

In order to achieve the above object, the developing cartridge of the present invention can be detachably mounted in a printer having a detecting mechanism, the developing cartridge includes a casing, an end cap, and a counting mechanism, the casing includes side walls on both sides and a cavity formed inside the casing; the end cap is mounted at an end of the housing; the counting mechanism comprises a counting moving part, the counting moving part is arranged on the side wall of the shell and between the end covers, a trigger rod used for touching the detection mechanism of the printer is arranged on the counting moving part, at least one part of the trigger rod is exposed to the outside of the end covers, and the counting moving part can drive the trigger rod to move so as to contact or separate from the detection mechanism of the printer when moving. The developing box further comprises a telescopic control rod and a reset mechanism, wherein the first end of the telescopic control rod is in contact with the counting movable piece so as to force the counting movable piece to move towards a first direction perpendicular to the side wall; the reset mechanism can force the counting movable piece to move towards a second direction opposite to the first direction. The end cover is provided with a first opening, and the second end of the telescopic control rod can penetrate through the first opening to be in contact with the internal structure of the printer. When the developing box is installed inside the printer, the second end of the telescopic control rod can touch the internal structure of the printer so as to force the telescopic control rod to move, and further force the counting movable piece to move towards the first direction; when the developing box is taken out of the printer, the second end of the telescopic control rod is separated from the internal structure of the printer, and the counting movable piece moves towards the second direction under the action of the reset mechanism.

The trigger bar is in a retraction state when the developing box is in an initial state, and the trigger bar cannot interfere with a printer when the developing box is installed. Promote the count moving part so that the trigger bar stretches out the end cover through setting up flexible control lever, the trigger bar can touch detection mechanism after developing box installation to printer like this. Meanwhile, when the developing box is taken out from the printer, the counting movable part moves under the action of the reset mechanism, so that the trigger rod is driven to retract, and the trigger rod cannot interfere with the printer when the developing box is taken out. The telescopic mode of the counting mechanism of the developing box is completely different from the telescopic mode of the existing counting mechanism, and the selectable scope of the counting mechanism is enriched.

In one embodiment, the telescopic control lever is rotatably mounted to an end of the developing cartridge, a first end of the telescopic control lever being provided with a first slope; a second inclined plane matched with the first inclined plane is arranged on the counting moving part; when the telescopic control rod is rotated, the first inclined surface is contacted with the second inclined surface so as to force the counting movable piece to move along a first direction. Through the cooperation of two inclined planes, the power of installing the direction converts the power of developing cartridge longitudinal direction into and promotes the count moving part and remove towards the first direction of perpendicular to lateral wall, the simple structure of flexible control lever.

In one embodiment, the counting mechanism further comprises a guide track, an elastic element and an actuating device, wherein the guide track is arranged on the inner side of the end cover and has a triangular outline, and the guide track is used for controlling the counting movable element to move from the initial position to the final position through the intermediate position under the condition of stress on the counting movable element; one end of the elastic piece is installed on the end cover of the developing box, and the other end of the elastic piece is installed on the counting movable piece so as to apply elastic force to the counting movable piece; the actuating device is used for forcing the counting movable piece to move along the triangular contour of the guide track. The counting moving piece is arranged on the guide rail, wherein a first limiting step is arranged in the guide rail and used for limiting the counting moving piece at an initial position; the end cover is provided with a second opening, and at least one part of the counting movable piece is exposed to the outside of the end cover through the second opening when the counting movable piece is in the final position, so that the counting movable piece can be manually restored to the initial position from the final position. The developing box can be used for detecting a normally closed printer, a moving path of a guide protrusion of a counting mechanism in a guide rail does not need to form a closed loop when the printer works, so that a limiting mechanism in the conventional developing box can be omitted, a user can reset the counting mechanism by manually shifting a counting moving part, the structure and the working process of the counting mechanism are simpler, and the processing and manufacturing cost of the developing box is lower.

In one embodiment, the actuating means comprise a first actuating projection for forcing the counting moving member to rotate and a second actuating projection for forcing the counting moving member to move, the first and second actuating projections being mounted on an end face of the stirring rack gear, the first actuating projection contacting the counting moving member before the second actuating projection upon rotation of the stirring rack gear. The counting moving part is provided with an arc-shaped pressed surface, and the first actuating protrusion can be contacted with the arc-shaped pressed surface when moving under the driving of the stirring frame gear, so that the counting moving part is driven to rotate. The actuating device further comprises a third actuating protrusion, the third actuating protrusion is mounted on the end face of the stirring frame gear, and the second actuating protrusion contacts the counting movable piece before the third actuating protrusion when the stirring frame gear rotates. Through the structural design, after the trigger rod of the counting moving part touches the detection mechanism of the printer, the trigger rod can be continuously contacted with the detection mechanism for a certain time, and then the trigger rod can be separated from the detection mechanism of the printer, so that the special requirements of the printer of certain specific models on detection time sequence control can be met.

In one embodiment, the second actuating protrusion is fan-shaped in a cross-sectional shape parallel to the side wall.

In one embodiment, the counter movable element is provided with a guide projection which projects into the guide track to control the movement of the counter movable element along the contour of the guide track.

In one embodiment, a second limit step is arranged in the guide track, and the second limit step is used for limiting the counting movable piece to return to the initial position when moving.

Drawings

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

Fig. 2 is a perspective view of the developing cartridge shown in fig. 1 with the end cap removed.

Fig. 3a and 3b are perspective views of the end cap removed in fig. 2, respectively.

Fig. 4 is a partial exploded view of the developing cartridge of the present invention.

Fig. 5a and 5b are a front view and a perspective view, respectively, of an end cap of the developing cartridge shown in fig. 1.

Fig. 6a and 6b are perspective views of the counting movable member of the developing cartridge of the present invention, respectively.

Fig. 7 is a partially enlarged view of a guide rail of the developing cartridge of the present invention.

Fig. 8a and 8b are perspective views of the telescopic controller of the developing cartridge of the present invention, respectively.

Fig. 9a and 9b are perspective views showing different angles of the fitting relationship of the counting movable member and the telescopic control member in the developing cartridge according to the present invention, respectively.

Fig. 10a and 10b are schematic views of different positions of the trigger lever in the developing cartridge of the present invention which extends and contracts along the second through hole, respectively.

Fig. 11a is a perspective view of the end cap with the reset mechanism installed.

Fig. 11b is a perspective view of the counter movable element with the reset mechanism mounted thereon.

Fig. 12a and 12b are perspective views of the stirring frame gear of the developing cartridge of the present invention, respectively.

Fig. 13a is a perspective view showing the relationship between the counter movable element and the gear of the agitator frame in the developing cartridge of the present invention.

Fig. 13b is a schematic view of the initial position of the guide projection in the guide rail in the developing cartridge of the present invention shown in fig. 13 a.

Fig. 13c is a schematic view of the first actuating projection coming into contact with the actuating means in the developing cartridge of the present invention.

Fig. 14a is a perspective view showing another fitting relationship of the counting movable member and the agitator frame gear in the developing cartridge of the present invention.

Fig. 14b is a schematic view showing an intermediate position of the guide projection in the guide rail in the developing cartridge of the present invention shown in fig. 14 a.

Fig. 15a is a perspective view showing another fitting relationship of the counting movable member and the agitator frame gear in the developing cartridge according to the present invention.

Fig. 15b is an explanatory view of another intermediate position of the guide projection in the guide rail in the developing cartridge of the present invention shown in fig. 15 a.

Fig. 16 is a schematic view showing a change in position of the trigger lever moving along the second through hole in the developing cartridge of the present invention.

Fig. 17a is a perspective view showing another fitting relationship of the counting movable member and the agitator frame gear in the developing cartridge of the present invention.

Fig. 17b is a schematic view showing a final position of the guide projection in the guide rail in the developing cartridge of the present invention shown in fig. 17 a.

Fig. 18 is another schematic view showing a change in position of the trigger lever moving along the second through hole in 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 2, in one embodiment, the developing cartridge of the present invention comprises a housing 1, a transmission assembly 2, a rotatable member 3 and an end cap 4, wherein the housing 1 comprises side walls 11 at both sides and a cavity formed therein for accommodating the rotatable member 3 or toner (developer). The rotatable member 3 includes, for example, a developing roller, a powder feeding roller, an agitating frame, or the like, and both ends of the rotatable member 3 are rotatably mounted on both side walls of the casing 1. The transmission assembly 2 is mounted at one end of the housing 1 and is located between the side wall 11 of the housing and the end cap 4. The transmission assembly 2 is used for driving the developing roller, the powder feeding roller or the stirring frame to rotate. The transmission assembly 2 generally comprises a driving force input gear 20, an agitating frame gear 21, a developing roller gear 22 and an intermediate gear 23, wherein the driving force input gear 20 is coaxially mounted with a power receiving port 24, and the developing roller gear 22 and the agitating frame gear 21 are coaxially mounted with the developing roller and the agitating frame respectively to drive the developing roller and the agitating frame to work respectively. 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 (image forming apparatus) to cooperate with other structures in the printer, thereby forming an image on a sheet (printing medium).

As shown in fig. 3a-3b and fig. 4, the developing cartridge of the present invention further includes a counting mechanism 5, a telescopic control member 6, and a reset mechanism 7, wherein the counting mechanism 5 is used for triggering a detecting mechanism in the printer to send a corresponding indication signal to the printer, the telescopic control member 6 is used for controlling the telescopic of the partial structure of the counting mechanism 5, and the reset mechanism 7 is used for resetting the partial structure of the counting mechanism 5 to the initial position.

In one embodiment, the counting mechanism 5 further includes a counting mover 51, a guide rail 52, an elastic member 53, and an actuating device 54, wherein the counting mover 51 is used for touching the detection mechanism of the printer, the guide rail 52 has a triangular profile and is used for controlling the counting mover 51 to move from an initial position 525 to a final position 527 via an intermediate position 526 when the counting mover 51 is stressed, the elastic member 53 is used for applying a pulling force to the counting mover 51 to move the counting mover 51 along the guide rail 52, and the actuating device 54 is used for forcing the counting mover 51 to move along the guide rail 52.

As shown in fig. 5a and 5b, in one embodiment, the end cap 4 of the developing cartridge of the present invention includes a first through hole 41 having a circular shape and a second through hole 42 having an elongated shape, wherein the power receiving port 24 mounted on the developing cartridge is engaged with a driving head of a printer after passing through the first through hole 41, so as to transmit the driving force of the printer to the developing cartridge. A part of the structure of the counter movable member 51 is exposed to the outside of the end cap 4 through the elongated second through hole 42 (described in detail later). The guide rail 52 is provided on the inner side of the end cap 4, i.e., on the side close to the side wall 11. In addition, the inner side of the end cover 4 of the developing cartridge of the present invention is further provided with a groove 44, and the groove 44 is used for fixing or accommodating the reset mechanism 7. In the embodiment of the present invention, the return mechanism 7 includes a spring 71 and a push block 72, the spring 71 is disposed in the groove 44, one side of the push block 72 is in contact with the spring 71, and the other side is in contact with the counting movable member 51, and the counting movable member 51 is pushed to return to the initial position under the elastic force of the spring 71.

In addition, the end cap 4 is provided with a first opening 47 and a second opening 45, at least a portion of the counting moving member 51 can be exposed to the outside of the end cap 4 through the second opening 45, and a user can touch the counting moving member 51 through the second opening 45 to push the counting moving member 51 from the final position 527 to the initial position 525. In the developing cartridge of the present invention, the second opening 45 is provided at the bottom of the end cap 4. At least a portion of the telescoping control 6 may be exposed to the outside of the end cap 4 through the first opening 47, the first opening 47 being positioned such that the portion of the telescoping control 47 exposed to the outside of the end cap 4 through the first opening 47 is accessible to a specific structure within the printer, such as a bump inside the printer near the developer cartridge. In some printers, the lugs are located on mounting rails within the printer that guide the mounting of the developer cartridge.

As shown in fig. 6a and 6b, in one embodiment, the counting moving part 51 includes a body 511, a trigger rod 512 located on one side of the body 511, and a pressure receiving surface 513 located on the other side of the body 511, at least a portion of the trigger rod 512 is located outside the end cap 4 after passing through the second through hole 42, and the trigger rod 512 is used for touching a detection mechanism on the printer so as to send an indication signal to the printer. The pressure-receiving surface 513 is of an arc-shaped configuration, and the actuating device 54 rotates the counter movable element 51 by contacting the pressure-receiving surface 513. The counting mover 51 further includes a guide protrusion 514, the guide protrusion 514 being located on the same side of the body 511 as the trigger lever 512, at least a portion of the guide protrusion 514 being capable of protruding into the guide rail 52 to control the moving path of the counting mover 51.

As shown in fig. 7, a first limit step 521 is provided in the guide rail 52 of the developing cartridge of the present invention, and the first limit step 521 is used to restrict the counter movable member 51 to the initial position 525. Specifically, the cylindrical surface of the guide protrusion 514 contacts the first limit step 521 to limit the movement of the guide protrusion 514 by the elastic member 53.

In the preferred embodiment, the elastic member 53 is an extension spring, and one end of the extension spring 53 is mounted on the end cap 4 and the other end is mounted on the counter movable member 51. Specifically, a first fixed seat 48 is provided on the end cap 4, a second fixed seat 515 is provided on the counting movable member 51, one end of the extension spring 53 is connected to the first fixed seat 48, and the other end is connected to the second fixed seat 515, as shown in fig. 3 a.

As shown in fig. 8a and 8b, in one embodiment, the telescopic controller 6 of the developing cartridge of the present invention includes a first end 61, a second end 62, and a hollow rotating shaft 63, and the first end 61 and the second end 62 are fixed on a cylindrical surface of the rotating shaft 63 at an angle. A cylinder 49 is provided on the inside of the end cap 4, and the cylinder 49 is inserted into the hollow rotary shaft 63 so that the telescopic control member 6 can be rotated around the cylinder 49. The second end 62 of the telescopic control rod 6 protrudes outside the end cap 4 through the first opening 47. The second end 62 can contact a tab in the printer when the cartridge is installed in the printer. A ramp 611 is provided on the first end 61 of the telescopic control 6. Accordingly, an inclined surface 5110 matching with the inclined surface 611 is disposed on the body 511 of the counting movable member 51, when the telescopic control member 6 rotates, the inclined surface 611 of the first end 61 contacts with the inclined surface 5110 of the counting movable member 51, and the inclined surface 611 slides relative to the inclined surface 5110, so as to push the counting movable member 51 to move along the first direction X perpendicular to the side wall 11, at which time the trigger rod 512 of the counting movable member 51 extends in the first direction, i.e., extends outward, as shown in fig. 10a and 10 b.

In assembling the end cap 4 of the developing cartridge, the reset mechanism 7 is first mounted in the groove 44 inside the end cap 4, as shown in fig. 11 a. And a counting movable piece 51 and an elastic piece 53 are arranged above the resetting mechanism 7, as shown in fig. 11 b. The telescopic control member 6 is then mounted on the cylinder 49 of the end cap 4, and the end cap 4 with the telescopic control member 6 mounted thereon is shown in fig. 3 a.

As shown in fig. 12a and 12b, in one embodiment, the actuating device 54 of the developing cartridge of the present invention includes a first actuating protrusion 541 and a second actuating protrusion 542, the first actuating protrusion 541 is used for forcing the counter mover 51 to rotate, and the second actuating protrusion 542 is used for forcing the counter mover to move, and the first actuating protrusion 541 and the second actuating protrusion 542 are installed on an end surface of the agitator frame gear 21 away from the side wall 11. The positions of the first and second actuating protrusions 541 and 542 on the end surface of the agitator frame gear 21 are set such that, when the agitator frame gear 21 is rotated, the first actuating protrusion 541 contacts the counter movable element 51 before the second actuating protrusion 542, and specifically, the first actuating protrusion 541 rotates the counter movable element 51 by contacting the arc-shaped pressure receiving surface 513. In the present embodiment, the position of the second actuating protrusion 542 is closer to the center of the agitator frame gear 21 than the position of the first actuating protrusion 541.

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 (or factory state), the trigger lever 512 of the counting mover 51 is in the retracted state shown in fig. 10a, and the guide protrusion 514 of the counting mover 51 is located in the guide rail 52 as shown in fig. 13 b. At this time, the actuating device 54 is not in operation, i.e., the first actuating protrusion 541 does not contact the arc-shaped pressure receiving surface 513 of the counter movable element 51, and the second actuating protrusion 542 does not contact the counter movable element 51, as shown in fig. 13 a. The tension spring 53 is in a stretched state in the initial state of the developing cartridge, and exerts a tensile force on the counter movable member 51. Since the guide protrusion 514 of the counting mover 51 is restrained by the first limit step 521, the counting mover 51 is restrained at the initial position 525.

The user loads the cartridge in the printer in an initial state, and the second end 62 of the telescopic lever 6 contacts the projection in the printer. The projection in the printer pushes the second end 62 of the telescopic control rod 6 to rotate the telescopic control rod 6 around the rotation shaft 63, the inclined surface 611 of the first end 61 contacts the inclined surface 5110 of the counter movable element 51, and the inclined surface 611 slides relative to the inclined surface 5110, so as to push the counter movable element 51 to move along the first direction X perpendicular to the side wall 11. At this time, the reset mechanism 7 is compressed to accumulate the repulsive force, and the trigger lever 512 of the counter movable element 51 is extended outward in the first direction X as shown in fig. 10b, so that the trigger lever 512 can touch the detection mechanism of the printer in the first direction.

In the present invention, after the user loads the developer cartridge in the initial state into the printer, the trigger lever 512 of the counter movable element 51 is in the first position where it does not contact 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 54 provided on the agitator frame gear 21 starts to drive the counting movement member 31 in movement. Specifically, when the stirring rack gear 21 rotates, the first actuating protrusion 541 is brought into contact with the pressure receiving surface 513 of the counting movable member 51 by the stirring rack gear 21, as shown in fig. 13 c. As the first actuation protrusion 541 continues to move along the pressure receiving surface 513, the counter movable member 51 is rotated. At the same time, the guide projection 514 of the counter-moving member 51 starts to move within the guide track 52 until it reaches the position shown in fig. 14b, i.e. the counter-moving member 51 is in the intermediate position 526. During this process, second actuation projection 542 does not contact end face 518 of counter-moving member 51.

As the agitator gear 21 continues to rotate, the first actuation protrusion 541 disengages from the pressure receiving surface 513 of the counter movable element 51, at which time the second actuation protrusion 542 begins to contact the end surface 518 of the counter movable element 51, as shown in fig. 14 a. In a preferred embodiment, since the second limit step 522 is provided in the guide rail 52, the guide protrusion 514 may move downward after passing through the second limit step 522, and then the second limit step 522 contacts the cylindrical surface of the guide protrusion 514 to limit the counter-movable member 51 from returning to the initial position 525 in the opposite direction. By providing the second limit step 522, even if the first actuation protrusion 541 is instantaneously disengaged from the pressure receiving surface 513 of the counting movable piece 51 and the second actuation protrusion 542 is not yet in contact with the end surface 518 of the counting movable piece 51, the counting movable piece 51 will not return to the initial position 525 in the opposite direction, which reduces the design and layout difficulties of the first actuation protrusion 541, the second actuation protrusion 542, the pressure receiving surface 513, and other structures.

As the agitator gear 21 rotates further, the second actuating protrusion 542 starts to push the counter movable element 51 to move under the driving of the agitator gear 21 until the guide protrusion 514 of the counter movable element 51 moves from the position shown in fig. 14b to the position shown in fig. 15b, i.e., the counter movable element 51 is at the other intermediate position 526. At this time, the trigger rod 512 of the counting movable member 51 will also move along the second elongated through hole 42 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, as shown in fig. 16. In this process, the first actuating protrusion 541 has disengaged from the pressure receiving surface 314 of the movable member 51. The extension spring 53 is still in a stretched state.

When the second actuating protrusion 542 continues to push the counter mover 51 to move until the guide protrusion 514 passes the lowest point 519 in the guide track 52, the counter mover 51 is moved by the tension spring 53, and the guide protrusion 514 of the counter mover 51 moves from the position shown in fig. 15b to the position shown in fig. 17b, i.e., the counter mover 51 is moved to the final position 527. At the same time, the trigger rod 512 of the counting movable member 51 will also move along the second elongated through hole 42 to disengage the detection mechanism on the printer, i.e. from the second position of contacting the detection mechanism to the first position of not contacting the detection mechanism, as shown in fig. 18. The counting mechanism 5 now completes the counting function. Thereafter, the actuating device 54 does not contact the counter movable element 51 again during the cyclic rotation of the agitator frame gear 21.

In a preferred embodiment, for some specific models of printers, due to the particularity of the detection timing control, the trigger lever 512 of the movable member 51 needs to be continuously contacted with the detection mechanism for a certain time after contacting the detection mechanism of the printer, and then can be separated from the detection mechanism of the printer. To achieve this particular requirement, in the developing cartridge of the present invention, the actuating device 54 further includes a third actuating protrusion 543, the third actuating protrusion 543 is mounted on the end surface of the agitating frame gear 21, and the second actuating protrusion 542 contacts the counter-movable member prior to the third actuating protrusion 543 when the agitating frame gear 21 rotates. The second actuating protrusion 542 has a fan shape along a sectional shape parallel to the side wall 11. The second actuating protrusion 542 is configured such that, when the second actuating protrusion 542 continues to push the counter mover 51 to move until the trigger lever 512 contacts the detection mechanism of the printer, after the trigger lever 512 contacts the detection mechanism of the printer, the end surface 518 of the counter mover 51 starts to move along the sector of the second actuating protrusion 542 until the end surface 518 of the counter mover 51 moves to the third actuating protrusion 543. In the process, the trigger lever 512 is in constant contact with the detection mechanism of the printer and the guide projection 514 does not clear the lowest point 519 within the guide track 52. Since the third actuating protrusion 543 is farther from the center of the agitator gear 21 than the second actuating protrusion 542, when the end surface 518 of the counter movable element 51 moves to the third actuating protrusion 543, the third actuating protrusion 543 will contact and push the counter movable element 51 to move further until the guide protrusion 514 passes the lowest point 519 in the guide track 52, the counter movable element 51 is moved by the tension spring 53, and the guide protrusion 514 of the counter movable element 51 moves from the position shown in fig. 15b to the position shown in fig. 17 b. The counting mechanism 5 now completes the counting function. Thereafter, the actuating device 54 does not contact the counter movable element 51 again during the cyclic rotation of the agitator frame gear 21.

The developing box can be used up after working for a period of time in the printer, the carbon powder in the developing box can be consumed, the user can take out the developing box from the printer and add the carbon powder in the developing box, or after factory detection is completed, when the user takes out the developing box from the printer, the second end 62 of the telescopic control rod 6 can be separated from the convex block in the printer. At this time, the reset mechanism 7 pushes the counting mover 51 to move in a second direction opposite to the first direction, and the trigger lever 512 of the counting mover 51 retracts toward the end cap 4 in the second direction. At the same time, the telescopic control rod 6 also rotates reversely under the action of the counting movable piece 51. After the trigger lever 512 of the counter movable member 51 is retracted in the second direction, the developer cartridge can be taken out from the printer, and the retracted trigger lever 512 does not interfere with the printer.

In a preferred embodiment, in order to facilitate the reverse rotation of the telescopic control lever 6 when the developing cartridge is removed from the printer, as shown in fig. 3a, the developing cartridge of the present invention is further provided with a spring 65, one end of the spring 65 is fixed to the end cap 4, and the other end is fixed to the second end 62 of the telescopic control lever 6. When the user takes the cartridge out of the printer, the second end 62 of the telescopic control lever 6 disengages from the protrusion in the printer, and the spring 65 applies a pulling force to the second end 62 to force the telescopic control lever 6 to rotate reversely, which is more advantageous to reduce the reset resistance of the counter movable member 51.

After taking out the developing cartridge, the user manually dials the reset portion 517 of the counting movable member 51 through the second opening 45, so that the guide protrusion 514 of the counting movable member 51 moves along the guide rail 52 from the position shown in fig. 17b to the position shown in fig. 13b, thereby resetting the counting mechanism of the developing cartridge. After the reset developing cartridge is loaded into the printer, the counting mechanism 5 cycles the above-described working process of the present invention, and the printer treats the used developing cartridge as a new developing cartridge.

In the conventional counting mechanism for detecting the normally open state in the developing cartridge, the moving path of the guide projection in the guide rail needs to be in a closed loop state when the printer operates. The developing box is mainly used for detecting a normally closed printer, and a moving path of a guide protrusion of a counting mechanism in a guide rail does not need to form a closed loop state when the printer works, so that a limiting mechanism in the conventional developing box can be omitted, and a user can reset the counting mechanism by manually shifting a counting moving piece, so that the structure and the working process of the counting mechanism are simpler, and the processing and manufacturing cost is lower.

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 utility model. The scope and spirit of the utility model are defined by the appended claims.

Claims (13)

1. A developing cartridge detachably mountable to a printer having a detecting mechanism, comprising:

the shell comprises side walls positioned on two sides and a cavity formed inside the shell;

an end cap mounted at an end of the housing; and

the counting mechanism further comprises a counting moving part, the counting moving part is arranged between the side wall of the shell and the end cover, a trigger rod used for touching a detection mechanism of the printer is arranged on the counting moving part, at least one part of the trigger rod is exposed to the outside of the end cover, and the counting moving part can drive the trigger rod to move to contact or separate from the detection mechanism of the printer when moving;

characterized in that, the developing cartridge further comprises:

the first end of the telescopic control rod is in contact with the counting movable piece so as to force the counting movable piece to move towards a first direction perpendicular to the side wall; and

the reset mechanism can force the counting movable piece to move towards a second direction opposite to the first direction;

the end cover is provided with a first opening, and the second end of the telescopic control rod can pass through the first opening and then is in contact with the internal structure of the printer;

when the developing box is installed inside the printer, the second end of the telescopic control rod can touch the internal structure of the printer so as to force the telescopic control rod to move and further force the counting movable piece to move towards the first direction;

when the developing box is taken out of the printer, the second end of the telescopic control rod is separated from the internal structure of the printer, and the counting movable piece moves towards the second direction under the action of the reset mechanism.

2. A developing cartridge according to claim 1, wherein said telescopic lever is rotatably mounted to an end portion of the developing cartridge, a first end of said telescopic lever being provided with a first slope;

a second inclined plane matched with the first inclined plane is arranged on the counting moving part;

when the telescopic control rod is rotated, the first inclined surface is contacted with the second inclined surface so as to force the counting movable piece to move along a first direction.

3. A developing cartridge according to claim 2, wherein said reset mechanism includes a spring and a push block mounted between said side wall and said count movable member, said push block being in contact with said count movable member and urging said count movable member to move in the second direction under the action of said spring.

4. A cartridge according to claim 1, wherein the printer includes a mounting rail along which the cartridge is mounted into the printer, and a projection on the mounting rail.

5. A developing cartridge according to any one of claims 1 to 4, wherein said counting mechanism further comprises:

the guide rail is arranged on the inner side of the end cover, has a triangular outline and is used for controlling the counting movable piece to move from an initial position to a final position through an intermediate position under the condition that the counting movable piece is stressed;

one end of the elastic piece is installed on the end cover of the developing box, and the other end of the elastic piece is installed on the counting movable piece so as to apply elastic force to the counting movable piece; and

an actuating device for forcing the counter-movable member to move along the triangular profile of the guide track;

the counting moving piece is arranged on the guide rail, wherein a first limiting step is arranged in the guide rail and used for limiting the counting moving piece at an initial position;

the end cover is provided with a second opening, and at least one part of the counting movable piece is exposed to the outside of the end cover through the second opening when the counting movable piece is in the final position, so that the counting movable piece can be manually restored to the initial position from the final position.

6. A developing cartridge according to claim 5, wherein said developing cartridge includes a transmission assembly including a stirring frame gear, said stirring frame gear being coaxially mounted with a rotation shaft of the stirring frame.

7. A developing cartridge according to claim 6, wherein said actuating means includes:

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

and a second actuating protrusion for forcing the counting movable piece to move, wherein the first actuating protrusion and the second actuating protrusion are installed on the end surface of the stirring rack gear, and the first actuating protrusion contacts the counting movable piece before the second actuating protrusion when the stirring rack gear rotates.

8. A developing cartridge according to claim 7, 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.

9. A cartridge according to claim 8, wherein said second actuating projection is closer to a center of said agitator frame gear than said first actuating projection.

10. A developing cartridge according to claim 7, wherein said actuating means further includes a third actuating projection, said third actuating projection being mounted on an end surface of the agitator gear, said second actuating projection contacting said counting movable member prior to the third actuating projection when the agitator gear rotates.

11. A developing cartridge according to claim 10, wherein said second actuating projection is fan-shaped in a sectional shape parallel to the side wall.

12. A developing cartridge according to claim 5, wherein a guide projection is provided on the counter movable member, the guide projection projecting into the guide rail to control the movement of the counter movable member along the contour of the guide rail.

13. A developing cartridge according to claim 5, wherein a second limit step is provided in the guide rail, the second limit step being for limiting the return of the count movable member to the initial position when the count movable member moves.

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