CN105573092B

CN105573092B - Processing box

Info

Publication number: CN105573092B
Application number: CN201510964507.3A
Authority: CN
Inventors: 杨晓锋; 王其乐
Original assignee: Print Rite Unicorn Image Products Co Ltd
Current assignee: Print Rite Unicorn Image Products Co Ltd
Priority date: 2015-12-18
Filing date: 2015-12-18
Publication date: 2022-03-01
Anticipated expiration: 2035-12-18
Also published as: CN105573092A

Abstract

The invention relates to a processing box, which belongs to the technical field of laser printing and comprises a box body, a photosensitive drum and a separation device. Wherein, the sensitization drum includes revolving force transmission assembly, and revolving force transmission assembly includes revolving force transmission piece, and revolving force transmission piece includes guide arm and revolving force receiving portion, and the tip that the guide arm is close to revolving force receiving portion is equipped with the atress portion. The separating device is arranged at one end of the box body close to the rotating force receiving part and comprises a push rod, a reset piece and a lever, a force application part for applying force to the force application part is arranged at the end part of the action arm of the lever, which is far away from the rotating support shaft, the lever is driven to rotate around the axis of the rotating support shaft by the sliding of the guided part arranged on the lever receiving arm along the guide surface arranged on the push rod, and the connecting and separating process of the rotating force receiving part and the host machine drive shaft is controlled. The separating device improves the smoothness of connection and separation of the processing box in the processes of falling and taking off the processing box from the main machine, and effectively reduces the friction resistance.

Description

Processing box

Technical Field

The invention relates to a processing box for supplying carbon powder to a laser printer.

Background

A laser printer is an apparatus for forming an image on a printing medium such as paper using an electrophotographic principle, and is generally composed of a main body and a process cartridge detachably mounted to the main body; the process cartridge has a cartridge body, a photosensitive drum for forming an electrostatic latent image, and a developing roller for supplying a developer to the photosensitive drum to develop the electrostatic latent image, the photosensitive drum and the developing roller being rotatably supported between both end walls of the cartridge body. The photosensitive drum has a drum and a rotational force transmitting assembly mounted on one axial end of the drum, and the drum is generally composed of an aluminum pipe and a photosensitive material layer coated outside the aluminum pipe. When the processing box is arranged on the host machine, the rotating force transmission assembly is convenient to be firmly connected with a driving shaft arranged on the host machine, and the rotating force of the driving shaft is transmitted to the drum barrel and other rotating pieces, so that the normal work of the photosensitive drum and other rotating pieces is ensured; when the toner in the process cartridge is exhausted, the process cartridge needs to be detached from the main body to replace the process cartridge, and the rotational force transmission assembly should be easily decoupled from the driving shaft by an external force during the detachment of the process cartridge.

Patent document No. CN101846955A discloses a process cartridge, which includes a housing, a photosensitive drum mounted in the housing, a power receiving port connected to the photosensitive drum and providing power to the photosensitive drum, a telescopic mechanism for allowing the power receiving port to extend and retract along the axial direction of the photosensitive drum, and a control mechanism for controlling the telescopic mechanism to extend and retract. The control mechanism comprises a first elastic element and a press rod arranged on one side of a power receiving port on the processing box shell, the press rod is connected with the telescopic mechanism, one end of the first elastic element is connected with the press rod, the other end of the first elastic element is connected with the processing box shell, an opening is formed in one end of the press rod, a pushing surface and a retracting surface are arranged at the opening end, a height difference exists between the pushing surface and the retracting surface in the axial direction of the photosensitive drum, a supporting table is arranged on the power receiving port, and the supporting table can be supported by the pushing surface or the retracting surface. The telescopic mechanism is a guide groove arranged on the photosensitive drum element and a guide post arranged on the power receiving port, and the guide post can slide along the guide groove. In the working process, the end part of the pressing rod is abutted by the convex block on the printer host cover body, and the power receiving port is close to the driving shaft on the host and is connected with the driving shaft by the extrusion action of the pushing surface to the supporting table, so that the axial power receiving port is driven to transmit the rotating torque, and the processing box is driven to normally work. However, in the whole working process, the connection between the power receiving port and the main machine driving shaft needs to be supported by the extrusion and the abutting between the propelling surface and the table top of the supporting table, and when the supporting table rotates relative to the propelling surface, the friction resistance is generated, namely, the propelling surface and the table top of the supporting table are always in an extrusion dry friction state, which is not beneficial to the stable work of the processing box.

Disclosure of Invention

The invention aims to provide a processing box which aims to improve the smoothness of connection and disconnection in the processes of falling and detaching from a main machine and effectively reduce the friction resistance.

In order to achieve the above-described main object, the present invention provides a process cartridge including a cartridge body, a photosensitive drum rotatably supported between both end walls of the cartridge body, and a disengaging device provided at one end of the cartridge body. The photosensitive drum includes a drum and a rotational force transmitting assembly mounted at one axial end of the drum. Revolving force transmission assembly includes drum gear, rotatory power transmission piece, first elastic component and axial locating part, and rotatory power transmission piece includes the guide arm and is located the revolving force receiving part of an axial end of guide arm. The drum gear is provided with an accommodating cavity with one axial end open, the other axial end of the drum gear is provided with a guide hole communicated with the accommodating cavity, and the other axial end of the guide rod penetrates through the accommodating cavity and is in clearance fit with the guide hole. The first elastic component forces the rotating force receiving part to be far away from the containing cavity, and the axial limiting part forms the limiting position of the rotating force receiving part far away from the containing cavity. The end of the guide rod close to the rotating force receiving part is provided with a stressed part used for receiving acting force for overcoming the restoring force of the first elastic part. The disengaging gear is arranged at one end of the box body close to the rotating force receiving part and comprises a push rod, a reset piece and a lever. The axial direction of the rotating support shaft of the lever is orthogonal to the axial direction of the guide rod. The push rod can reciprocate between a disengagement position and a coupling position along a direction parallel to the end surface of the box body, and the reset piece forces the push rod to reset to the disengagement position. The push rod is provided with a guide surface, and the distance between the guide surface and the rotating force receiving part in the axial direction of the guide rod is gradually reduced along the direction from the disengaging position to the coupling position. The receiving arm of the lever is provided with a guided part which slides along the guide surface, and the end part of the acting arm is a force application part which applies force to the force application part on the guide rod.

According to the scheme, after the processing box is installed in a printer host, the convex block on the cover body abuts against the end face of the push rod along with the closing of the cover body, the push rod is enabled to move from the disengaging position to the connecting position, the force application part on the lever action arm moves along the direction far away from the box body through the sliding of the guided part along the guide surface, the guide rod moves towards the direction close to the drive shaft of the host under the action of the elastic restoring force of the first elastic part, the connection between the rotating force receiving part and the drive shaft is completed, a certain distance is reserved between the rotating force receiving part and the drive shaft in the process of installing the processing box into the host, and the smoothness of connection in the falling process of the processing box is effectively ensured. In the printing process, the coupling between the rotating force receiving part and the driving shaft is ensured by the elastic restoring force of the first elastic member, and compared with the prior art, the friction resistance between the force applying part and the force receiving part is effectively reduced, so that the stable work of the processing box is ensured. When the carbon powder in the processing box is used up, the main machine cover body is opened to replace the processing box, after the cover body is opened, the end part of the push rod loses external constraint force, the push rod is reset to a separation position from the connection position under the action of the reset force of the reset piece or assisted by certain pull force, the lever action arm moves along the direction close to the box body through the sliding of the guided part along the guide surface, the rotating force receiving part is driven to move along the axial direction of the guide rod to the direction close to the drum gear, the separation and connection of the rotating force receiving part and the driving shaft are realized, and the smoothness of separation and connection in the process of taking the processing box from the main machine is effectively ensured.

One concrete scheme is that the push rod body is a plate-shaped structure, a convex block is formed on the surface of the push rod body, which faces to one side of the receiving arm, along the axial direction parallel to the guide rod, and the end surface of the convex block, which faces away from the push rod body, forms a guide surface; the receiving arm is provided with a guide groove matched with the lug, and the edge part of the guide hole far away from the acting arm forms a guided part. After the connection is completed, the lever moves along with the guide rod to enable the guided part to abut against the guide surface, so that the guided part is less limited by the guide surface, the interference of the separation device on the normal work of the processing box is reduced, and the stable work of the processing box is effectively ensured.

The other specific scheme is that the resetting piece is a second elastic piece, one end of the second elastic piece is pressed on the push rod, and the other end of the second elastic piece is pressed on the box body. The restoring force of the elastic piece provides restoring force for the push rod to restore to the disengaging position, and the structure is simple and effective.

The reset piece is a first magnet and a second magnet which are oppositely arranged in the same pole, the first magnet is fixed on the push rod, and the second magnet is fixed on the box body. The repulsion force between the homopolarity of the magnets provides reset force for the push rod to reset to the separation position, compared with the elastic piece, the space structure between the two magnets has no special requirement, namely the interference to the structural arrangement of the box body is reduced, and the structure on the box body can not abut against or contact each other to influence the moving process of the push rod.

One preferable scheme is that the end wall of the box body is provided with a sliding groove matched with the push rod. Simple structure provides effectual support and guide for the reciprocating motion of push rod.

The more preferable scheme is that the end part of the push rod far away from the action arm extends along the direction parallel to the axial direction of the guide rod and far away from the rotating force receiving part to form a top pressure plate part, and the end part of the push rod close to the action arm is bulged to form a limiting clamping hook; when the top pressing plate part is abutted against the end face of the chute far away from the acting arm, the push rod is stopped at a coupling position; when the limiting clamping hook abuts against the end face, close to the acting arm, of the sliding groove, the push rod is stopped at the separation position. Simple structure is effective, and the equipment of being convenient for.

Another preferable mode is that the acting arm is deviated in a direction away from the rotational support shaft toward the rotational force receiving portion with respect to the receiving arm. The size of the process cartridge is effectively reduced.

Another preferred scheme is that when the processing box is not subjected to external constraint force, the end part of the push rod is not subjected to the action of the abutting pressure of the convex block on the main machine cover body, and the resultant force of the restoring force of the first elastic piece and the restoring force of the restoring piece enables the push rod to be located at the disengaging position. The disengaging device automatically drives the rotating force receiving part to be disengaged from the driving shaft of the main machine.

Another preferable mode is that the guide surface includes an arc surface and a chamfered surface smoothly connected to the arc surface, and the chamfered surface is located at an end of the arc surface away from the rotational force receiving portion. The chamfer surface is convenient for starting the separation process, the arc surface is effectively adapted to the separation process, and the requirement that the pressure applied to the guide rod is larger and larger is met.

In another preferred scheme, an input arm extending towards the radial center of the drum gear is arranged on the inner wall of the accommodating cavity parallel to the axial direction of the drum gear, an output arm extending outwards along the radial direction of the guide rod is arranged on the radial outer wall of the guide rod, and the output arm and the input arm form abutting contact at the position where the input arm is located in the circumferential direction of the drum gear; the first resilient member also urges the output arm away from the input arm. The smoothness of the coupling process of the rotational force receiving portion and the driving shaft is effectively improved.

Drawings

FIG. 1 is a perspective view of a first embodiment of the present invention;

FIG. 2 is a perspective view of a photosensitive drum in the first embodiment of the present invention;

FIG. 3 is a structural view of a rotational force transmitting assembly in the first embodiment of the present invention;

fig. 4 is a perspective view of a rotational force transmission member in the first embodiment of the present invention;

FIG. 5 is a perspective view of a drum gear in the first embodiment of the present invention;

FIG. 6 is an exploded view of the detachment device in the first embodiment of the present invention;

FIG. 7 is a first perspective view of the putter in accordance with the first embodiment of the present invention;

FIG. 8 is a perspective view of the putter of the first embodiment of the present invention from a second perspective;

FIG. 9 is a structural view of a lever in the first embodiment of the present invention;

FIG. 10 is a front view of the lever in the first embodiment of the present invention;

FIG. 11 is a perspective view of the end cap of the cartridge body in accordance with the first embodiment of the present invention;

FIG. 12 is an exploded view of the disengagement means and cartridge end cap of the first embodiment of the present invention;

FIG. 13 is a coupling view of the disengaging means and the rotational force transmitting assembly in accordance with the first embodiment of the present invention;

FIG. 14 is a schematic view of the disengaging means controlling the rotating force receiving portion to be disengaged from the driving shaft of the main body in the first embodiment of the present invention;

FIG. 15 is a schematic view of the disengaging means controlling the coupling state of the rotational force receiving portion with the driving shaft of the main unit in accordance with the first embodiment of the present invention;

FIG. 16 is a structural view of a rotational force receiving member in the second embodiment of the present invention;

FIG. 17 is a perspective view of a push rod in a third embodiment of the present invention;

FIG. 18 is a perspective view of a lever in a third embodiment of the present invention;

FIG. 19 is a structural view of a push rod in a fourth embodiment of the invention;

FIG. 20 is a front view of a lever in a fourth embodiment of the present invention;

FIG. 21 is a perspective view of a disengagement device, a cartridge end cap and a rotational force receiving member in a sixth embodiment of the present invention;

FIG. 22 is a perspective view of the disengaging device, cartridge end cap and rotational force receiving member of FIG. 21 with the cartridge end cap cut away in an upper half;

fig. 23 is a perspective view of the cartridge body end cap and push rod from a view opposite that of fig. 22.

The invention is further illustrated by the following examples and figures.

Detailed Description

The invention mainly improves a mechanism for controlling the separation of the rotary force receiving part from the driving shaft of the printer main body, so as to improve the smooth connection and separation of the processing box in the processes of falling and taking off the printer main body, reduce the friction resistance, and design other parts of the processing box according to the existing products.

First embodiment

Referring to fig. 1, the process cartridge has a cartridge body 1, a photosensitive drum 2 rotatably supported between both end walls of the cartridge body 1, and a disengaging device 3 mounted on an end cap 11 of the cartridge body 1.

Referring to fig. 2, the photosensitive drum 2 has a drum 21 and a rotational force transmitting assembly 22 mounted on one axial end of the drum 21, and the drum 21 is composed of an aluminum pipe and a photosensitive material layer coated on the aluminum pipe.

Referring to fig. 3, the rotational force transmitting assembly 22 is composed of a rotational force transmitting member 221, an axial direction stopper 222, a torsion spring 223, and a drum gear 224. The drum gear 224 is provided with an accommodating chamber 2240 opened at one axial end thereof, and the other axial end is formed with a guide hole 2242 communicating with the accommodating chamber 2240.

Referring to fig. 4, the rotational force transmission member 221 is composed of a cylindrical guide rod 2211 and a rotational force receiving portion 2212 at one axial end of the guide rod 2211. The guide bar 2211 is provided with an output arm 22111 extending radially outward along the radially outer wall thereof. The outer end wall 22123 of the rotational force receiving portion 2212, which faces away from the guide bar 2211, is formed with a recess 22121, the recess 22121 penetrates the rotational force receiving portion 2212 in the radial direction of the guide bar 2211, the outer end walls 22123 of both sides of the recess 22121 are each formed with a rotational force receiving arm 22122 protruding outward in the axial direction of the guide bar 2211, one side of the rotational force receiving arm 22122 is formed with a concave surface 221221 for receiving the rotational force applying arm of the drive shaft, and both the rotational force receiving arms 22122 and the recess 22121 are arranged symmetrically with respect to the center of the axis of the guide bar 2211. In a direction in which the guide bar 2211 is axially directed toward the rotational force receiving portion 2212, the rotational force receiving arm 22122 is gradually contracted along the guide bar 2211 in a direction away from the side 221222 of the guide bar 2211, that is, the distance between the side 221222 and the axis of the guide bar 2211 is gradually reduced to form a smooth curved surface. In the direction in which the guide bar 2211 is axially directed toward the rotational force receiving portion 2212, the outer end wall 22123 is gradually narrowed in the direction approaching the rotational force receiving arm 22122 to form a smooth curved surface. The connecting portion of the guide bar 2211 and the rotational force receiving portion 2212 is necked to form an annular groove 22112, and the side wall surface of the annular groove 22112 away from the rotational force receiving portion 2212 constitutes a force receiving portion of the present embodiment.

Referring to fig. 2 and 5, the drum gear 224 has a substantially cylindrical outer shape, and a helical gear 2241 is provided on a radially outer wall of the drum gear 224 at about the middle in the axial direction thereof, for transmitting the rotational force received by the drum gear 224 to other rotating members. The receiving chamber 2240 is provided with an output arm 2244 extending toward the radial center of the drum gear 224 on the inner wall parallel to the axial direction of the drum gear 224. The end faces, far away from the guide holes 2242, of the two output walls 2244 are convexly formed along the direction far away from the guide holes 2242, and guide angles are formed on the end faces, back to the guide holes 2242, of the fixing hooks 22440.

The other axial end of the guide rod 2211 sequentially passes through the through hole 2220 formed in the axial stopper 222, the torsion spring 223 and the accommodating chamber 2240 to the guide hole 2242 in clearance fit therewith, so that the rotational force transmission member 221 can reciprocate relative to the drum gear 224 in the axial direction of the guide rod 2211; in the circumferential direction of the drum gear 224, the output arm 22111 is in abutting contact with the input arm 2244 at the position of the input arm 2244, thereby transmitting the rotational force received by the rotational force receiving portion 2212 to the drum gear 224.

One of the torsion arms of the torsion spring 223 is fixed to one of the output arms 22111, and the other is fixed to a fixing post 2243 formed in the accommodating chamber 2240, so that the output arm 22111 is located between the two input arms 2244 in the circumferential direction of the drum gear 224, i.e., the elastic restoring force of the torsion spring 223 in the circumferential direction urges the output arm 22111 away from the input arm 2244. The axial limiting member 222 covers the open end of the accommodating cavity 2240, and is in snap fit with the peripheral end surface of the through hole 2220 in the axial limiting member 222 through the fixing snap 22440, so that the axial limiting member 222 is fixedly connected with the drum gear 224, and the part of the through hole 2220, which is matched with the fixing snap 22440, forms a bayonet in this embodiment; also, the elastic restoring force of the torsion spring 223 in the axial direction urges the output arm 22111 against the axial stopper 222. When the rotational force applying arm 011 of the drive shaft 01 is coupled with the rotational force receiving arm 22122, the hemispherical end 012 of the drive shaft 01 is positioned in the recess 2212 with a gap between the hemispherical end 012 and both sides of the recess 22122. The torsion spring 223 constitutes a first elastic member in this embodiment.

Referring to fig. 6, the disengaging means 3 is constituted by a push rod 31, a lever 32 and a spring 33. The spring 33 constitutes a second elastic member of the present embodiment, and the second elastic member is a restoring member of the present embodiment, and its elastic restoring force is a restoring force of the restoring member.

Referring to fig. 7 and 8, the body 310 of the push rod 31 is a plate-shaped structure, one end of which is bent by 90 degrees to form a top pressing plate 311, and the other end of which is protruded to form two limit hooks 313. The inner side surface of the top pressure plate portion 311 is provided with an annular cylinder 312, an inner cavity 3120 of the annular cylinder 312 is used for accommodating one end of the spring 33, and in the working process, one end of the spring 33 always abuts against the bottom surface of the accommodating cavity 3120. A projection 314 is formed on the side of the body 310 opposite to the annular cylinder 312 in a protruding manner, i.e., the projection 314 is formed on the plate surface of the body 310 facing the lever 32. The end surface of the protrusion 314 away from the body 310 is a guide surface 3140, and the distance between the guide surface 3140 and the body 310 gradually decreases along the length direction of the body 310 from the hook 313 to the top pressing plate 311. The guide surface has an arc surface 31401 and a chamfered surface 31402 smoothly connected with the arc surface 31401, and the chamfered surface 31402 is located at one end of the arc surface 31401 far from the rotational force receiving portion 2212.

Referring to fig. 9 and 10, the lever 32 is composed of a receiving arm 320, an acting arm 323, and a rotation supporting shaft 34, and the rotation supporting shaft 34 is a rod body fixedly connected to a connection portion of the receiving arm 320 and the acting arm 323. The receiving arm 320 is provided with a guiding groove 321 matching with the bump 314, and the guiding groove 321 is a through groove. The end of the actuating arm 323 remote from the pivot support shaft 34 is a bayonet 324 that mates with the annular bayonet 22112. The acting arm 323 is constituted by a tilting arm 3232 and an applying arm 3231, wherein the applying arm 3231 is arranged substantially in parallel to the receiving arm 320, the tilting arm 3232 is arranged tilted upward with respect to the receiving arm 320, that is, in a direction away from the rotation supporting shaft 34, and the acting arm 323 is deviated with respect to the receiving arm 320 in a direction approaching the rotational force receiving portion 2212. The bayonet 324 constitutes the urging portion of the present embodiment.

The end wall of the base 110 of the end cap 11 is recessed to form a coupling limit groove 111, a slide groove 112, a disengagement limit groove 113, a receiving groove 114, and a mounting groove 115 for mounting the spring 33. Two pairs of claws 1151 are convexly formed on both side end surfaces of the receiving groove 114, and a channel 1150 between each pair of claws 1151 forms a fixing groove for fixing one end of the rotary supporting shaft 34. The coupling limiting groove 111, the sliding groove 112, the disengagement limiting groove 113 and the accommodating groove 114 are sequentially communicated. The end wall of the chute 112 adjacent to the rotational force receiving portion 2212 is formed with a long notch 1121 for protruding the projection 314 from the end wall of the case, i.e., for protruding the guide surface 3140 from the end wall of the case.

Referring to fig. 12, the body 310 of the lever 31 is disposed in the sliding slot 112 and can slide back and forth along the sliding slot 112, the limit hook 313 is compressed after being inserted into the sliding slot 112, and is released after entering the disengagement limit groove 113 to be fastened on an end wall of the disengagement limit groove 113 close to the sliding slot 112, so as to limit the movable range of the body 310 along the sliding slot 112, that is, when the limit hook 313 abuts against an end wall of the disengagement limit groove 113, that is, when the limit hook 313 abuts against an end surface of the sliding slot 112 close to the acting arm, the push rod 31 is stopped at the disengagement position; the top pressure plate part 311 is positioned in the coupling limiting groove 111, and the movable range of the body 310 along the sliding groove 115 is limited by the mutual abutting of the inner end surface of the top pressure plate part and the end wall of the coupling limiting groove 111, at the moment, the top pressure plate part 311 abuts against the end wall of the coupling limiting groove 111, namely the limiting clamping hook 313 abuts against the end surface of the sliding groove 112 far away from the acting arm, and the push rod 31 is stopped at the coupling position; thereby ensuring that the push rod 31 can be moved back and forth between the coupling position and the decoupling position. One end of the spring 33 abuts against the closed end wall of the mounting groove 115 and the other end abuts against the bottom surface of the annular cylinder 312, and the elastic restoring force of the spring 33 urges the body 310 to move in a direction away from the disengagement limit groove 113, that is, urges the push rod 31 to move to the disengagement position. The rotating support shaft 34 is engaged in the fixed slot and is rotatable about its own axis.

Referring to fig. 13, the bayonet 324 is engaged with the annular bayonet 22112, and the guiding surface 3140 of the projection 314 abuts against the guiding hole 321 away from the rotational force receiving portion 2212, so that the receiving arm 320 is guided to move along the surface of the guiding surface 3140 and rotate around the axis of the rotation support 34. The guide hole 321 remote from the edge portion of the rotational force receiving portion 2212 constitutes the guided portion of the present embodiment.

Referring to fig. 14, after the process cartridge is loaded into the printer main body, before the main body cover is closed, the top pressing plate portion 311 is kept at a position away from the rotational force receiving member 221 by the elastic restoring force of the spring 33, the push lever 31 is always kept, that is, the push rod 31 is kept at the disengagement position, and the distance between the guide surface 3140 and the rotational force receiving portion 2212 in the axial direction of the guide rod 2211 gradually decreases as the rotational force receiving portion 2212 is directed to the coupling position along the disengagement position, and the end wall of the guide hole 321 far from the rotational force receiving portion 2212 is located at the high position of the guide surface 3140, and at this time, the bayonet 324 of the acting arm 323 applies a downward force in the axial direction of the guide rod 2211 to the annular bayonet slot 22112, so that the rotational force receiving portion 2212 is always kept in the disengagement state from the drive shaft 01, that is, the rotational force receiving portion 2212 is spaced from the drive shaft 01 by a predetermined distance, so that the process cartridge can be easily loaded into the printer main body, and the process cartridge can be smoothly dropped.

Referring to fig. 15, after the cover body is closed, the bump 02 on the cover body applies a pressing force to the top plate portion 311 in a direction approaching the rotational force receiving member 221, thereby compressing the spring 33, the end wall of the guide hole 321 loses the support of the guide surface 3140, and under the elastic restoring force of the torsion spring 223 along the guide rod 2211 axial direction, the acting arm 323 and the receiving arm 320 rotate clockwise around the axis of the rotation support shaft 34, and the rotational force receiving member 221 moves upward until the push rod 31 moves to the coupling position, thereby coupling the rotational force receiving member 2212 and the drive shaft 01, and performing a subsequent printing operation.

When the toner in the process cartridge is exhausted, the process cartridge needs to be replaced, the cover body is opened, the lug 02 on the cover body does not apply pressing force to the top pressing plate portion 311 any more, and the rotating force receiving member 221 is pushed to move downwards by the sliding of the guided portion along the guide surface under the action of the elastic restoring force of the spring 33 until the push rod 31 moves to the disengaging position, so that the rotating force receiving portion 2212 is disengaged from the drive shaft 01, and the process cartridge is convenient to take out from the printer host.

During printing, since the coupling maintaining force between the rotational force receiving part 2212 and the driving shaft 01 is provided by the elastic restoring force of the torsion spring 223 in the axial direction of the guide bar 2211, the stability of the operation of the process cartridge is effectively ensured.

In this embodiment, when the top pressure plate portion 311 is not constrained by the projection 02, the resultant force of the elastic restoring forces of the torsion spring 223 and the spring 33 automatically moves the push rod 31 to the disengaged position, which is convenient for the use of the process cartridge, i.e. as shown in fig. 14, the torsion spring 223 axial restoring force cooperates with the force applying portion through the force receiving portion to generate a moment in a clockwise direction to the acting arm 323, the axial restoring force of the spring 33 cooperates with the guided surface to generate a moment in a counterclockwise direction to the receiving arm 320 through the guiding surface, the resultant moment of the two moments is in the counterclockwise direction, and the driving lever rotates counterclockwise around the rotation support shaft 34.

Second embodiment

As a description of the second embodiment of the present invention, only the differences from the first embodiment will be described below.

Referring to fig. 16, the guide rod 4211 of the rotational force receiving member 421 is protrusively formed with an outer shoulder 4210 at an outer side wall of an end portion thereof adjacent to the rotational force receiving portion 4212, and the outer shoulder 4210 forms a force receiving portion of the present embodiment.

Third embodiment

As a description of the third embodiment of the present invention, only the differences from the first embodiment will be described below.

Referring to fig. 17, a circular arc type guide groove 4140 is formed on one long side surface of the projection 414 on the push rod 41, and both side wall surfaces of the guide groove 4140 constitute the guide surface of the present embodiment.

Referring to fig. 18, a cylindrical slider 4201 engaged with the guide groove 4140 is protrudingly formed at a position corresponding to the guide groove 4140 of the receiving arm 420 of the lever 42.

The rotation of the lever 42 about the axis of the rotation support shaft 44 is achieved by the sliding of the columnar slider 4201 along the guide groove 4140.

The columnar slider 4201 constitutes the guided portion of the present embodiment.

Fourth embodiment

As a description of the fourth embodiment of the present invention, only the differences from the first embodiment will be described below.

Referring to fig. 19, wings 511 matched with the sliding grooves are formed at both sides of a body 510 of the push rod 51, a guide groove 514 is concavely formed on an upper surface of the body 510, and a bottom surface 5140 of the guide groove 514 is an arc-shaped surface which constitutes a guide surface of the present embodiment.

Referring to fig. 20, the end of the receiving arm 520 of the lever 52 is a cylindrical slider 5201 fitted to the guide groove 514.

The rotation of the lever 52 about the axis of the rotation support shaft 54 is realized by the sliding of the columnar slider 5201 along the bottom face 5140.

The end of the receiving arm 510 constitutes the guided portion of the present embodiment.

Fifth embodiment

As a description of the fifth embodiment of the present invention, only the differences from the first embodiment will be described below.

The end part of the top pressure plate part of the push rod, which is far away from the limiting clamping hook, is provided with a pull rod, and when the processing box is not under the action of external constraint force and the top pressure plate part is not under the action of the constraint force of a lug on the main machine cover body, if the resultant force of the elastic restoring force of the spring and the elastic restoring force of the torsion spring is not enough to enable the push rod to be positioned at a separation position, the pull rod applies certain pulling force to the push rod to assist the separation device to work.

Sixth embodiment

As a description of the sixth embodiment of the present invention, only the differences from the first embodiment will be described below.

This example employs two magnet blocks arranged with like poles facing each other instead of the spring 33 in the first embodiment.

Referring to fig. 21 to 23, a surrounding wall 712 is formed by protruding an inner side surface of the top plate portion 711 of the push rod 71, and the surrounding wall 712 and the body 710 surround a mounting seat for mounting the first magnet block 331.

As the push rod 71 moves from the disengaged position to the coupled position, the end cap 61 is formed with a mounting seat 615 for mounting the second magnet block 332 at a downstream of the first magnet block 331 in a direction in which the first magnet block 331 moves.

Referring to fig. 23, the inner side wall surface of the end cover 61 protrudes to form two sliding grooves 6121 with oppositely arranged notches, in the process that the body 710 reciprocates along the sliding grooves 6121, when the end face 7120 on the top pressing plate portion 711 abuts against the right end surface of the sliding groove 6121, that is, the end face of the sliding groove 6121 is far away from the action arm, the push rod 71 is located at the coupling position, and when the limit hook 713 abuts against the left end surface of the sliding groove 6121, that is, the end face of the action arm is close to, the push rod 71 is located at the disengagement position.

The end cap 61 has a receiving cavity 610 formed therein for receiving the lever 72 and the protrusion 714. The receiving chamber 610 is located between the two slide slots 6121, and the opening 6120 of the receiving chamber 610 allows the guide face 7140 to extend into the receiving chamber 610.

When the process cartridge is loaded into the printer main body, the cover applies pressure to the top pressing plate 711 as the cover of the main body is closed, thereby overcoming the repulsive force between the first magnet 331 and the second magnet 332 and compressing the gap therebetween, even if the push rod 71 moves from the disengaged position to the engaged position; when the lid is opened, the top pressing plate 711 loses its biasing force by the lid, and the push rod 71 is moved from the coupling position to the decoupling position by the repulsive force between the first magnet block 331 and the second magnet block 332.

The first magnet piece 331 and the second magnet piece 332 together constitute the returning member of the present embodiment, and the repulsive force therebetween constitutes the returning force of the returning member.

The main idea of the invention is to improve the mechanism for controlling the rotating force receiving part to be decoupled from the driving shaft of the printer main body, so as to improve the smoothness of the coupling and decoupling of the process box in the process of falling and taking off the printer main body and reduce the friction resistance. There are also many obvious variations of the shape of the guiding surface according to the present concept, such as the use of a flat surface instead of an arc-shaped surface; the structure of the stress part and the force application part has various obvious changes, for example, the stress part is a plurality of support shafts arranged on the outer side wall of the guide rod along the radial direction of the guide rod, a ring sleeve is sleeved on the guide rod, and the ring sleeve is hinged with the end part of the action arm through a hinge shaft; there are also many obvious variations in the structure of the guided portion and the manner of attachment of the detaching device to the end of the case.

Claims

1. The processing box comprises a box body and a photosensitive drum which is rotatably supported between two end walls of the box body, wherein the photosensitive drum comprises a drum barrel and a rotating force transmission assembly which is arranged at one axial end of the drum barrel;

the rotating force transmission assembly comprises a drum gear, a rotating force transmission piece, a first elastic piece and an axial limiting piece, wherein the rotating force transmission piece comprises a guide rod and a rotating force receiving part located at one axial end of the guide rod;

the drum gear is provided with an accommodating cavity which is opened at one axial end of the drum gear, a guide hole communicated with the accommodating cavity is formed at the other axial end of the drum gear, and the other axial end of the guide rod penetrates through the accommodating cavity and is in clearance fit with the guide hole;

the first elastic piece forces the rotating force receiving part to be far away from the accommodating cavity, and the axial limiting piece forms the limiting of the rotating force receiving part to be far away from the accommodating cavity;

the method is characterized in that:

the end part of the guide rod, which is close to the rotating force receiving part, is provided with a stressed part for receiving acting force for overcoming the restoring force of the first elastic part;

the disengaging gear is arranged at one end of the box body close to the rotating force receiving part and comprises a push rod, a reset piece and a lever;

the axial direction of the rotating support shaft of the lever is orthogonal to the axial direction of the guide rod;

the push rod can move back and forth between a disengagement position and a coupling position along a direction parallel to the end surface of the box body, and the reset piece forces the push rod to reset to the disengagement position;

the push rod is provided with a guide surface, and the distance between the guide surface and the rotating force receiving part in the axial direction of the guide rod is gradually reduced along the direction from the disengaging position to the coupling position;

the receiving arm of the lever is provided with a guided part which slides along the guide surface, and the end part of the acting arm of the lever is a force application part which applies force to the force application part.

2. A process cartridge according to claim 1, wherein:

the body of the push rod is of a plate-shaped structure, a convex block is formed on the plate surface of the body facing one side of the receiving arm along the axial direction parallel to the guide rod, and the end surface of the convex block back to the body forms the guide surface;

the receiving arm is provided with a guide groove matched with the bump, and the edge part of the guide groove far away from the acting arm forms the guided part.

3. A process cartridge according to claim 1, wherein:

the reset piece is a second elastic piece, one end of the second elastic piece is pressed on the push rod, and the other end of the second elastic piece is pressed on the box body.

4. A process cartridge according to claim 1, wherein:

the reset piece is a first magnet and a second magnet which are oppositely arranged in the same pole, the first magnet is fixed on the push rod, and the second magnet is fixed on the box body.

5. A process cartridge according to any one of claims 1 to 4, wherein:

the box body is provided with a sliding groove matched with the push rod.

6. A process cartridge according to claim 5, wherein:

the end part of the push rod far away from the action arm extends along the axial direction parallel to the guide rod towards the direction far away from the rotating force receiving part to form a top pressure plate part, and the end part of the push rod close to the action arm is protruded to form a limiting clamping hook;

when the top pressing plate part abuts against the end face, far away from the acting arm, of the sliding groove, the push rod is stopped at the coupling position;

when the limiting clamping hook abuts against the end face, close to the acting arm, of the sliding groove, the push rod is stopped at the separation position.

7. A process cartridge according to any one of claims 1 to 4, wherein:

the acting arm is deviated from the receiving arm in a direction of approaching the rotational force receiving portion in a direction of departing from the rotational support shaft.

8. A process cartridge according to any one of claims 1 to 4, wherein:

when the processing box is not subjected to external constraint force, the push rod is positioned at the disengaging position by the resultant force of the restoring force of the first elastic piece and the restoring force of the restoring piece.

9. A process cartridge according to any one of claims 1 to 4, wherein:

the guide face include the arc surface and with the smooth chamfer surface of connecting of arc surface, the chamfer surface is located the arc surface is kept away from the one end of revolving force receiving portion.

10. A process cartridge according to any one of claims 1 to 4, wherein:

an input arm extending towards the radial center of the drum gear is arranged on the inner wall of the accommodating cavity parallel to the axial direction of the drum gear, an output arm extending outwards along the radial direction of the guide rod is arranged on the outer wall of the guide rod in the radial direction, and the output arm and the input arm form abutting contact in the position where the input arm is located in the circumferential direction of the drum gear;

the first resilient member also urges the output arm away from the input arm.