CN107219746B - Drum unit and process cartridge having the same - Google Patents

Abstract

The invention relates to a drum unit and a processing box with the drum unit, wherein the drum unit comprises a drum unit shell, a photosensitive piece and a control device, the photosensitive piece is rotatably arranged in the drum unit shell, the control device is arranged on the drum unit shell, the photosensitive piece comprises a photosensitive cylinder and a power transmission device, the power transmission device is arranged at one longitudinal tail end of the photosensitive cylinder and is used for receiving driving force from an external power source, the control device is used for controlling the combination and separation of the power transmission device and the external power source, the control device comprises a stroke amplification mechanism and a magnetic action mechanism positioned between the stroke amplification mechanism and the power transmission device, the stroke amplification mechanism comprises a driving rod, a driven rod, a large gear part and a small gear part which are mutually combined, the driving rod is combined with the small gear part, the driven rod is combined with the large; the power receiving part in the power transmission device is connected with the gear part into a whole through the connecting mechanism, so that the power receiving part can not be disengaged from the gear part.

Description

Drum unit and process cartridge having same

technical field

The present invention relates to the field of electrophotographic image forming, and more particularly, to a drum unit detachably mounted in an electrophotographic image forming apparatus and a process cartridge having the drum unit.

Background technique

Electrophotographic imaging equipment (hereinafter referred to as "equipment") is one of the indispensable equipment in the modern office field. Common equipment includes laser printers, laser copiers, etc., both of which use laser beams loaded with target information to scan photosensitive parts. On the surface, an electrostatic latent image is formed on the surface of the photosensitive member, and then the electrostatic latent image is developed with a developer, and finally the developed electrostatic latent image is transferred to the medium material through the transfer device in the equipment, thus completing the imaging process.

The above-mentioned developer is generally accommodated in a process cartridge detachably installed in the apparatus, and the above-mentioned photosensitive member is installed in the apparatus or installed in the process cartridge.

Take the above-mentioned laser printer and the installation of the photosensitive member in the process box as an example. The photosensitive member includes a photosensitive cylinder coated with photosensitive material and a power transmission device installed at one end of the photosensitive cylinder. Receive the driving force, and transmit the received driving force to the photosensitive member to drive the photosensitive member to rotate.

An existing power transmission device includes a gear part fixedly installed at one end of the photosensitive cylinder and a power receiving part installed in the gear part and freely swinging. One end of the power receiving part is a sphere, and the power is transferred through a pin. The receiving part is combined with the gear part, and the other end receives the driving force from the inside of the laser printer, and the pin transmits the driving force to the gear part, and then drives the photosensitive cylinder to rotate. Because one end of the power receiving part installed in the gear part is a sphere in this structure, the rotation axis of the power receiving part can swing freely relative to the rotation axis of the photosensitive cylinder, that is, the two rotation axes can be coaxial or Can have a certain angle of inclination.

Contents of the invention

The present invention provides a drum unit, on one end of the drum unit, a power receiving member for receiving driving force from the outside is installed, the power receiving member is not equipped with a sphere, and its rotation axis is always coaxial with the rotation axis of the photosensitive cylinder, Moreover, the power receiving part and the gear part are integrated through the connection mechanism, so there is no possibility that the power receiving part will be disengaged from the gear part.

The drum unit can be independently installed in the equipment in a detachable manner, and can also become a part of the process box and be detachably installed in the equipment along with the process box. Therefore, the present invention also provides a process box, the process box The cartridge includes the aforementioned drum unit.

To achieve the above object, the present invention adopts the following scheme:

The drum unit comprises a drum unit housing, a photosensitive member rotatably installed in the drum unit housing and a control device installed on the drum unit housing, the photosensitive member includes a photosensitive cylinder and is mounted on a longitudinal end of the photosensitive cylinder and uses For a power transmission device that receives driving force from an external power source, the control device is used to control the combination and separation of the power transmission device and the external power source. Magnetic action mechanism, the stroke amplification mechanism includes an active rod, a passive rod, and a large gear part and a pinion part combined with each other, the active rod is combined with the pinion part, the passive rod is combined with the large gear part, and the active rod is connected from the drum protrudes from the unit case.

The stroke amplification mechanism further includes a second elastic member, one end of which is in contact with the passive rod, and the other end of the second elastic member is in contact with the shell of the drum unit.

The passive rod includes a rod body, a protrusion extending from the rod body, an action part located at both ends of the rod body and a second rack part, the second rack part meshes with the large gear part, and the protrusion is combined with the power transmission device.

The magnetic action mechanism includes an active magnetic part and a passive magnetic part that can interact, the active magnetic part is installed on the action part, and the passive magnetic part is installed on the power transmission device.

The power transmission device includes a power receiving part, an intermediate part, a supporting part, a drum gear and a first elastic part, the power receiving part enters through the intermediate part and is fixed in the supporting part; the supporting part is combined with the drum gear; the first elastic part One end abuts against the supporting member, and the other end abuts against the gear portion; the gear portion is fixed at one longitudinal end of the photosensitive cylinder.

The middle piece is a cylindrical body with opposite upper and lower surfaces, including a second through hole passing through the middle piece and intersecting with the upper and lower surfaces, and a passive magnetic piece mounting groove arranged on the upper surface, the passive magnetic piece It is fixedly installed in the installation groove of the passive magnetic part; the intermediate piece also includes an anti-skid groove arranged therein, and the protrusion is combined with the anti-skid groove.

Further, the drum unit also includes a bracket installed on the drum unit shell and on the same side as the power transmission device, and the bracket is used to support the photosensitive element.

Specifically, the bracket includes a fifth through hole for the power receiving member to pass through and an anti-loosening groove, and the rod body of the passive rod is accommodated in the anti-loosening groove.

The process cartridge provided by the present invention includes a developing unit and the drum unit as described above, and the developing unit and the drum unit are connected to each other.

As mentioned above, the power receiving part is not equipped with a ball, but is integrated with the gear part through the connecting mechanism. Therefore, the power receiving part in the present invention does not have the possibility of being disengaged from the gear part.

Description of drawings

Fig. 1 is a schematic view of the overall structure of a process cartridge according to the present invention.

Fig. 2 is a structural schematic diagram of the drum unit involved in the present invention.

Fig. 3A is an exploded schematic diagram of the structure of the power transmission device and the control device in the present invention.

Fig. 3B is a schematic structural view of the gear part in the power transmission device of the present invention.

Fig. 3C is a schematic structural diagram of the passive rod in the control device of the present invention.

Fig. 3D is a schematic diagram of the structure of the stent of the present invention.

Fig. 4 is a sectional view of the power transmission device in the present invention along section A-A in Fig. 2 .

Fig. 5A is a schematic view of the state of the control device and the power transmission device when the power receiving member is extended in the present invention.

Fig. 5B is a schematic view of the state of the control device and the power transmission device when the power receiving member is retracted in the present invention.

Detailed ways

Describe the embodiment of the present invention in detail below in conjunction with accompanying drawing, wherein, drum unit can be installed in the equipment that has power take-off in detachable mode independently, also can become the part of process box along with the process box is detachably installed in equipment with In the equipment of the power output part.

[Structure of Drum Unit and Process Cartridge]

Fig. 1 is a schematic diagram of the overall structure of a process cartridge according to the present invention; Fig. 2 is a schematic diagram of the structure of a drum unit according to the present invention.

As shown in FIGS. 1 and 2, the process cartridge C includes a developing unit 1 and a drum unit 2 connected to each other. The developing unit 1 includes a developing unit housing 10 and a developing member (not shown) installed in the developing unit housing. ), the drum unit 2 includes a drum unit housing 20 and a photosensitive member 3 that is rotatably installed in the drum unit housing, and the photosensitive member includes a photosensitive cylinder 30 with a rotation axis L1 and a photosensitive cylinder mounted on a photosensitive cylinder The power transmission device 4 at the longitudinal end, the power transmission device 4 is used to receive the driving force from the external power source; at the same time, in order to ensure the more stable rotation of the photosensitive member 3, the drum unit 2 also includes a drum unit mounted on the drum unit housing And the bracket 21 on the same side as the power transmission device 4 is used to support the photosensitive element 3 .

When the drum unit 2 is installed into the equipment and starts to work, the power transmission device 4 is combined with the external power source and receives the driving force output by the external power source; when the drum unit 2 needs to be taken out from the equipment, the power transmission The device 4 must be disengaged from the external power source. Therefore, the drum unit 2 of the present invention also includes a control device 5 for controlling the combination and disengagement of the power transmission device 4 from the external power source. The control device 5 is installed on the drum unit. On the casing 2, in the embodiment of the present invention, the external power source is the power output part in the device. As shown in Figure 2, the control device 5 includes a stroke amplification mechanism 7 and a magnetic action mechanism 6 located between the stroke amplification mechanism and the power transmission device, and the magnetic action mechanism 6 interacts with the power transmission device 4 through a magnetic force , the stroke amplification mechanism 7 is mounted on the drum unit housing 20 .

[Structure of power transmission device and control device]

3A is a schematic diagram of an exploded structure of a power transmission device and a control device in the present invention; FIG. 3B is a schematic structural diagram of a gear part in a power transmission device; FIG. 3C is a schematic structural diagram of a passive rod in a control device; FIG. 3D is a schematic structural diagram of a bracket; Fig. 4 is a sectional view of the power transmission device along section A-A in Fig. 2 .

As shown in Figure 3A, the power transmission device 4 includes a power receiving part 41, a connecting mechanism 46, a first elastic part 44 and a gear part 45; preferably, the first elastic part 44 is a first spring, and the power receiving part 41 and The connection mechanism 46 is fixedly connected; the connection mechanism 46 is combined with the gear part 45; one end of the first spring 44 abuts the connection mechanism, and the other end abuts the gear part; the gear part 45 is fixed on a longitudinal end of the photosensitive cylinder 30, thus, the gear The rotation axis of the part 45 is the same as the rotation axis of the photosensitive cylinder 30; the power receiving member 41 is used to combine with the power output member and receive the driving force, and the connecting mechanism 46 is used to receive the driving force received by the power receiving member 41 transmitted to the gear unit 45 .

As shown in FIG. 3A , the power receiver 41 has a rotation axis L2 and includes a first part 411 and a second part 412 connected to each other. The second part 412 is used to combine with the power output part. The first part 411 is columnar body, and a first through hole 413 is also provided on the first part; the connecting mechanism 46 includes a split intermediate piece 42 and a support piece 43, as shown in the figure, the intermediate piece 42 is a columnar body, preferably a cylinder, And the middle piece 42 has an opposite upper surface 42a and a lower surface 42b, and also includes a second through hole 421 passing through the middle piece 42 and intersecting with the upper surface 42a and the lower surface 42b; the support piece 43 is also a columnar body , preferably a cylinder, as shown in the figure, the support member 43 also has an upper surface 43a and a lower surface 43b, and also has a third through hole 431 passing through the support member 43 and intersecting the upper surface 43a and the lower surface 43b, meanwhile, A fourth through hole 432 and a power transmission part 433 are also provided on the side of the support 43, the fourth through hole 432 passes through the support 43 and intersects with the third through hole 431, and the power transmission part 433 is along the support A protrusion extending radially outward from the support surface; the first portion 411 of the power receiving member 41 passes through the second through hole 421 into the third through hole 431, and makes the first through hole 413 and the fourth through hole The holes 432 are opposite, and a pin (not shown) passes through the first through hole 413 and the fourth through hole 432 , so as to realize the connection of the connecting mechanism 46 of the power receiving member 41 .

As mentioned above, the power receiving member 41 and the connecting mechanism 46 are connected by pins. Therefore, those skilled in the art can easily imagine that the first part 411 does not necessarily need to pass through the third through hole 431, only the first part 411 needs to be ensured. It is sufficient that the hole 413 is opposite to the fourth through hole 432 , therefore, the third through hole 431 may also be configured as a blind hole.

As shown in FIG. 3B , the gear part 45 includes a flange body 450 and a gear 457 formed on the flange body. The flange body 450 surrounds and forms a flange chamber 451 having an oppositely disposed opening 452 and a bottom wall 453, A first accommodating groove 456 for combining with the power transmission part 433 is formed on the inner wall of the flange cavity between the opening 452 and the bottom wall 453; At least one of the surface 43b and the bottom wall 453 of the gear part is provided with a mounting part. The mounting part can be, for example, a housing groove for accommodating a spring or a protruding part for supporting a spring. The axis L1 forms an extension portion 454 from the bottom wall 453 to a direction away from the opening 452 , and a second receiving groove 455 is formed in the extending portion 454 , and one end of the spring 44 is accommodated in the second receiving groove 455 .

In the embodiment of the present invention, the power receiver 41 in the power transmission device 4 is integrated with the connection mechanism 46, and the connection mechanism 46 is combined with the gear part 45, so that the rotation axis L2 of the power receiver 41 will always be aligned with the gear. The rotation axis of the part 45 remains coaxial, and the rotation axis of the gear part 45 is the same as the rotation axis L1 of the photosensitive cylinder 30. Therefore, the rotation axis L2 of the power receiving member 41 in the present invention will always be the same as that of the photosensitive cylinder 30. The axes of rotation L1 remain coaxial.

The structure of the magnetic action mechanism 6 and the stroke amplification mechanism 7 in the control device and the relationship between the control device 5 and the power transmission device 4 will be described below with reference to FIG. 3A , FIG. 3C and FIG. 3D .

As shown in Fig. 3A and Fig. 3C, stroke amplification mechanism 7 comprises active lever 71, passive lever 72 and gear part 73, and described gear part 73 is used for connecting active lever 71 and passive lever 72, and active lever 71 is provided with first The rack portion 711, the gear portion 73 includes a large gear portion 73a and a small gear portion 73b combined with each other, preferably, the large gear portion 73a and the small gear portion 73b are integrated to form a double gear, the first rack portion 711 and the small gear portion The gear part 73b is combined, and the large gear part 73a is combined with the passive rod 72; the passive rod 72 includes a rod body 720 and an action part 721 and a second rack part 722 located at both ends of the rod body, and the large gear part 73a is connected to the second rack The active part 722 is engaged, and the active part 721 includes a fork 7211 connected with the rod body.

The magnetic action mechanism 6 includes an active magnetic part 61 and a passive magnetic part 62 that can interact. Preferably, the active magnetic part 61 and the passive magnetic part 62 are magnets, and the active magnetic part 61 is installed on the stroke amplification mechanism 7. The magnetic part 62 is installed on the power transmission device 4. Specifically, as shown in FIG. 3A and FIG. 3B, the active magnetic part 61 is installed on the fork 7211 of the passive rod, and the passive magnetic part 62 is installed on the upper surface of the intermediate part 42 42a on. As shown in FIG. 3C , the active part 721 also includes an active magnetic component installation groove 7212 provided on the fork 7211 , and the active magnetic component 61 is fixedly installed in the active magnetic component installation groove 7212 ; as shown in FIG. 3B , The middle piece 42 also includes a passive magnetic component installation groove 422 provided on the upper surface 42a, and the passive magnetic component 62 is fixedly installed in the passive magnetic component installation groove 422 . In order to realize the control function of the control device 5, the magnetism of the adjacent side of the active magnetic part 61 and the passive magnetic part 62 is the same, and when the active magnetic part 61 and the passive magnetic part 62 are opposite, the repulsive force generated between the two Acting on the power transmission device 4, when the active magnetic part 61 and the passive magnetic part 62 are not opposite, that is, when the two are misaligned, no force will be generated between them.

As mentioned above, since the active magnetic part 61 and the passive magnetic part 62 have two states of relative and non-relative, that is, the fork 7211 needs to be reset after moving, therefore, the stroke amplification mechanism 7 also includes a second elastic part 74 , preferably, the second elastic member 74 is a second spring for resetting the fork 7211. As shown in FIG. Abut. 3A and 3C, the passive rod 72 also includes a support block 723 protruding from the rod body 720 for supporting the second spring 74, the second spring 74 is fixed on the support block 723, specifically, in the support A protruding post 724 is formed on the block 723 , and one end of the second spring 74 is fixed on the protruding post 724 , and the other end abuts against the drum unit shell 20 .

As shown in FIG. 4 , when the power transmission device 4 is assembled, the first spring 44 is accommodated in the second receiving groove 455 , and the first spring 44 abuts against the lower surface 43 b of the support member 43 , and the intermediate member 42 The lower surface 42b of the support member 43 is in contact with the upper surface 43a. When the power receiving part 41 receives the external driving force, the driving force will be transmitted to the supporting part 43 through the pin, so that the supporting part 43 will rotate. At this time, since the intermediate part 42 is not affected by the driving force, , theoretically, the middle piece 42 will remain stationary relative to the support piece 43; however, since the lower surface 42b of the middle piece keeps in contact with the upper surface 43a of the support piece, there There will be a certain friction force, and when the friction force reaches a certain value, the intermediate member 42 will start to rotate, resulting in constant changes in the relative position between the active magnetic member 61 and the passive magnetic member 62, and the control device 5 will fail.

In order to avoid the relative position change between the active magnetic part 61 and the passive magnetic part 62 caused by the rotation of the middle part 42, as shown in FIG. It includes a protrusion 725 extending from the rod body 720, and the protrusion 725 is combined with the anti-movement groove 423; in order to ensure that the protrusion 725 is more stable combined with the anti-movement groove 423, preferably, the anti-movement groove 423 and the second through hole 421 communicated to ensure that the protrusion 725 has a larger contact area with the anti-movement groove 423 .

As mentioned above, the active magnetic part 61 is installed on the fork 7211 of the passive rod, and the passive magnetic part 62 is installed on the intermediate part 42. When the active magnetic part 61 is opposite to the passive magnetic part 62, there will be A repulsive force is generated, and the repulsive force will not only act on the middle piece 42, but also act on the passive rod 72 through the fork 7211. Therefore, the passive rod 72 may fall off.

As shown in Figure 3D, the bracket 21 includes a fifth through hole 211 and an anti-off groove 212 for the power receiving member 41 to pass through. After the drum unit 2 or the process cartridge C are assembled, the bracket 21 is fixedly installed on the drum unit. 2, the power receiver 21 passes through the fifth through hole 211, and the rod body 720 of the passive rod is accommodated in the anti-loosening groove 212. When the passive rod 72 is subjected to a repulsive force, the bracket 21 abuts against the passive rod 72, thereby effectively The passive rod 72 is prevented from coming off.

[Extension and retraction of the power receiver]

Fig. 5A is a schematic diagram of the state of the control device and the power transmission device when the power receiver is extended; Fig. 5B is a schematic diagram of the state of the control device and the power transmission device when the power receiver is retracted.

Before the drum unit 2 or the process cartridge C on which the power transmission device 4 and the control device 5 are installed are loaded into the equipment, the power receiver 41 is in the extended state shown in Figure 5A, at this time, the first spring 44 and the second The springs 74 are all in an uncompressed state, and the active magnetic part 61 and the passive magnetic part 62 are misplaced. As shown by the dotted line in FIG. The rotation axis L1 of the drum gear 45 is coaxial with the rotation axis L2 of the power receiver 41 .

As shown in Figure 5A, when the active lever 71 is subjected to the action of an external force F, the external force F may be from the operator, or from the drum unit 2 on which the control device 5 is installed or the process cartridge C is loaded. The process of the equipment is subjected to the action from the inner wall of the equipment. In the embodiment of the present invention, taking the external force F from the inner wall of the equipment as an example, the active rod 71 moves in the direction indicated by d1 under the action of the external force F, and passes through the first rack part 711, the double gear 73 and the second Due to the action of the rack part 722, the passive rod 72 will move along the direction shown by d2, and the fork 7211 on which the active magnetic part 61 is installed moves along the direction shown by d2 to the position opposite to the passive magnetic part 62 along with the passive rod 72. position, thus a repulsive force is generated between the active magnetic part 61 and the passive magnetic part 62, and the repulsive force pushes the intermediate part 42, the supporting part 43 and drives the power receiving part 41 to move along the retraction direction shown by d3; at the same time, the first A spring 44 and a second spring 74 are respectively compressed and deformed by the support member 43 and the passive rod 72, as shown in FIG. When balanced, the power receiving member 41 no longer retracts in the direction indicated by d3.

When the drum unit 2 or the process cartridge C arrived at the predetermined position in the device, the buckle on the surface of the drum unit 2 or the process cartridge C would enter into the corresponding draw-in groove. The contact of the inner wall, that is, the external force F no longer exists, and the passive rod 72 moves in the direction opposite to the direction shown by d2 under the action of the elastic restoring force of the second spring 74, through the second rack part 7222, double-link Due to the action of the gear 73 and the first rack portion 711, the active rod 71 will move in the direction opposite to the direction shown by d1; while the passive rod 72 moves, the active magnetic part 61 on the fork 7211 will gradually move with the passive The magnetic part 62 is misplaced, and the repulsive force between the active magnetic part 61 and the passive magnetic part 62 will gradually disappear, and the middle part 42, the supporting part 43 and the power receiving part 41 connected with the supporting part 43 will be elastically reset by the first spring 44 Move in the direction opposite to that shown in d3 under the action of force, and the power receiving part 41 stretches out and combines with the power output part in the equipment. At this time, each part in the control device 5 will return to the position shown in Figure 5A initial state.

The above has described the retraction and extension process of the power receiver 41 during the installation of the drum unit 2 or the process cartridge C into the device. When the end user needs to take the drum unit 2 or the process cartridge C out of the device, the power receiver The member 41 will repeat the above-mentioned retraction and extension process again.

That is to say, when the end user needs to take out the drum unit 2 or the process cartridge C, it only needs to lift the process cartridge C in FIG. 1 or the drum unit 2 in FIG. Touch the inner wall of the equipment again, that is, the action rod 71 is again subjected to the action of the external force F, and the various parts of the control device 5 will repeat the above-mentioned movement process, the power receiving part 41 completes the retraction action and is separated from the power output part, and the end user smoothly puts the The drum unit 2 or the process cartridge C is taken out from the equipment; subsequently, the active lever 71 no longer touches the inner wall of the equipment, the external force F disappears, and each part of the power transmission device 4 and the control device 5 returns to the initial state shown in Fig. 5A State, at this time, the power receiving member 41 is stretched out.

[Explanation of stroke enlargement mechanism]

As shown in Figure 2, the stroke amplification mechanism 7 is installed in the drum unit 2, specifically, the stroke amplification mechanism 7 is on the same side as the power transmission device 4, wherein the active rod 71 protrudes from the drum unit housing 20, and the double gear 73 The active rod 71 and the passive rod 72 are respectively engaged with the dual gear 73 by being fixed on the drum unit shell 20 by pivot pins. As mentioned above, when the active rod 71 receives the external force F, the active rod 71 and the passive rod 72 will move along the directions d1 and d2 in FIG. When 711 is engaged with the second rack portion 722 by a single gear, the stroke of the active lever 71 along the direction shown by d1 will be equal to the stroke of the passive lever 72 along the direction shown by d2; however, limited by the drum unit 2 or the process cartridge C The internal structure and the distance between the drum unit 2 and the inner wall of the device, the stroke t1 that the active rod 71 is allowed to move in the direction shown by d1 is smaller than the stroke t2 required for the active magnetic part 61 to be displaced from the passive magnetic part 62 to the two relatives , therefore, under the premise that the active lever 71 has a small stroke, in order to ensure that the active magnetic member 61 has enough stroke, the embodiment of the present invention uses the dual gear 73, and the active lever 71 and the pinion of the dual gear Part 73b meshes, and the passive lever 72 meshes with the large gear part 73a of the dual gear.

The number of the dual gears 73 is not limited to one, and when the stroke t1 is smaller or the stroke t2 is required to be larger, multiple dual gears can be used for multi-stage transmission to ensure that the active magnetic parts 61 has sufficient stroke; of course, the formation form of the large gear part 73a and the small gear part 73b is not limited to the two ones, when the space of the drum unit 2 in the longitudinal direction is not enough to place the double gear, it can also be considered The large gear part 73a and the small gear part 73b are arranged in a separate form. At this time, the active rod 71 meshes with the small gear part 73b, the passive rod 72 meshes with the large gear part 73a, and the large gear part 73a meshes with the small gear part 73b.

As mentioned above, the active magnetic part 61 and the passive magnetic part 62 among the present invention interact in the mode of repulsive force, before the drum unit 2 or the process cartridge C are loaded into the equipment, the power receiving part 41 is in an extended state; During the process of loading the unit 2 or the process cartridge C into the equipment, the active magnetic member 61 is opposite to the passive magnetic member 62, and a repulsive force is generated between the two, and the power receiving member 41 is pushed toward the gear part 45 by the repulsive force to retract ; After the drum unit 2 or the process cartridge C are fully loaded into the equipment, the active magnetic part 61 and the passive magnetic part 62 are dislocated, the repulsive force between the two disappears, and the power receiving part 41 is installed in the first spring in the gear part 45 44 launched. Obviously, the active magnetic part 61 and the passive magnetic part 62 may also interact in an attractive manner, and before the drum unit 2 or the process cartridge C is loaded into the device, the power receiving part 41 is also in an extended state; When the drum unit 2 or the process cartridge C is loaded into the device, the active magnetic member 61 is opposite to the passive magnetic member 62, and an attractive force is generated between the two, and the power receiving member 41 is sucked in the direction of the gear part 45 by the attractive force retraction; after the drum unit 2 or the process cartridge C are fully loaded into the device, the active magnetic part 61 and the passive magnetic part 62 are dislocated, and the attraction force between the two disappears, and the power receiving part 41 is installed on the first gear part 45 A spring 44 is pushed out.

The power receiver 41 in the present invention is not equipped with a sphere, but is integrated with the gear part 45 through the connecting mechanism 46, and no matter at any time, the rotation axis L2 of the power receiver 41 is always in line with the rotation axis of the photosensitive cylinder 30 L1 is coaxial, so there is no possibility that the power receiving member 41 and the gear part 45 will be disengaged.

Claims (10)

1. drum unit including drum unit shell, the sensitive piece being rotatably installed in drum unit shell and is mounted on drum list Control device on first shell, sensitive piece include photosensitive cylinder and are mounted on one longitudinal end of photosensitive cylinder and are used for from outer Portion's power source receives the power transmission of driving force, and control device is used to control the knot of power transmission and external power supply It closes and separation, the control device includes stroke amplifying mechanism and between stroke amplifying mechanism and power transmission Magnetic action mechanism, the stroke amplifying mechanism include driving lever, by lever and the canine tooth wheel portion and pinion gear that be combined with each other Portion, driving lever is in conjunction with pinion part, by lever in conjunction with canine tooth wheel portion, which is characterized in that the driving lever is from drum unit shell It is prominent in body.

2. drum unit according to claim 1, which is characterized in that the stroke amplifying mechanism further includes the second elastic component, Second elastic component one end is abutted with by lever, and the other end is abutted with drum unit shell.

3. drum unit according to claim 2, which is characterized in that it is described by lever include the body of rod, extend from the body of rod Protrusion and service portion and the second tooth-strip part positioned at body of rod both ends, the second tooth-strip part are engaged with the canine tooth wheel portion, protrusion with Power transmission combines.

4. drum unit according to claim 3, which is characterized in that the magnetic action mechanism includes interactive master Dynamic magnetic part and passive magnetic part, active magnetic part are mounted on the service portion, and passive magnetic part is mounted on power transmitting dress It sets.

5. drum unit according to claim 4, which is characterized in that the power transmission include power reception part, in Between part, supporting element, drum gear and the first elastic component, power reception part pass through middleware enter and be fixed in supporting element；Support Part is in conjunction with drum gear；One end of first elastic component abuts supporting element, and the other end abuts gear part；Gear part is fixed on photosensitive circle One longitudinal end of cylinder.

6. drum unit according to claim 5, which is characterized in that the middleware is with opposite upper surface and following table The column in face, including across middleware and the second through-hole intersected with upper and lower surfaces and the quilt that upper surface is arranged in Dynamic magnetic part mounting groove, passive magnetic part are fixedly installed in passive magnetic part mounting groove.

7. drum unit according to claim 6, which is characterized in that the middleware further include be disposed therein it is anti-skidding Slot, the protrusion is in conjunction with non-slip groove.

8. drum unit according to claim 7, which is characterized in that the drum unit further includes being mounted on drum unit shell And the ipsilateral bracket with power transmission, the bracket are used to support sensitive piece.

9. drum unit according to claim 8, which is characterized in that the bracket includes the 5 passed through for power reception part Through-hole and it is anti-be disengaged from the groove, be accommodated in anti-be disengaged from the groove by the body of rod of lever.

10. handle box, which is characterized in that including developing cell and as described in any one of claim 1-9 claim Drum unit, the developing cell and drum unit are connected with each other.