CN220626867U - Processing box - Google Patents

Abstract

A process cartridge detachably mountable to a main assembly of an electronic image forming apparatus, the main assembly including a driving force transmitting member, the process cartridge including: a housing; a photosensitive drum rotatably supported by the casing; a driving force receiving unit which is connected with the photosensitive drum and can receive the driving force of the driving force transmission member to drive the photosensitive drum to rotate; the driving force receiving unit includes an engaging portion that engages the driving force transmitting member when the driving force transmitting member is engaged with the driving force receiving unit. The driving force receiving unit of the processing box is provided with the clamping part which is used for clamping the driving force transmitting member when the driving force transmitting member is jointed with the driving force receiving unit, so that the driving force receiving unit is prevented from being separated from the driving force transmitting member, and the power transmission is more stable.

Description

Processing box

Technical Field

The utility model relates to the technical field of electronic imaging devices, in particular to a processing box.

Background

Conventionally, in the field of electrophotographic image forming apparatuses, an electrophotographic photosensitive member (hereinafter referred to as a photosensitive drum) and a process means acting on the photosensitive drum are integrally formed as a cartridge (generally referred to as a process cartridge). Such a process cartridge is detachable from the main assembly of the image forming apparatus. In such a structure, the electronic image forming apparatus is provided with a driving force transmitting unit, and the process cartridge is provided with a driving force receiving unit that is engaged with the driving force transmitting unit to receive a rotational driving force.

CN113574469a discloses a main assembly driving force transfer unit, the driving force transfer unit includes a driving force transfer member, and correspondingly, the driving force receiving unit of the process cartridge includes a driving force receiving member, the driving force receiving member receives the driving force from the main assembly by being engaged with the driving force transfer member, and since the driving force receiving unit and the driving force transfer unit are not provided with other engaging members, the transfer of the driving force is ensured only by the engagement of the driving force receiving member and the driving force transfer member, and the situations of detachment and unstable connection are easy to occur in the transfer process.

Disclosure of Invention

According to an aspect of the present utility model, there is provided a process cartridge detachably mountable to a main assembly of an electronic image forming apparatus, the main assembly including a driving force transmitting member, the process cartridge comprising:

a housing; a photosensitive drum rotatably supported by the casing;

a driving force receiving unit which is connected with the photosensitive drum and can receive the driving force of the driving force transmission member to drive the photosensitive drum to rotate;

the driving force receiving unit includes an engaging portion that engages the driving force transmitting member when the driving force transmitting member is engaged with the driving force receiving unit, for preventing the driving force receiving unit from being disengaged from the driving force transmitting member.

In some embodiments, the engagement portion includes a guide slope at an end of the engagement portion toward the driving force transmission member.

In some embodiments, the driving force receiving unit includes a shaft portion at a position of a central axis thereof, the engagement portion is provided at the shaft portion, and the engagement portion engages with the positioning boss of the driving force transmitting member when the driving force receiving unit is engaged with the driving force transmitting member.

In some embodiments, the engagement portion is provided on an end of the shaft portion toward the driving force transmission member or an inner side wall of the shaft portion.

In some embodiments, the engagement portion is provided on a circumferential surface of an outermost side of the driving force receiving unit and extends along an axis of the driving force receiving unit.

In some embodiments, the engagement portion has one end connected to a circumferential surface of the driving force receiving unit that is outermost toward one end of the driving force transmitting member, and the other end extends in a direction toward the driving force transmitting member.

In some embodiments, the driving force transmitting member is provided with an annular flange, and the engaging portion grips an outer surface of the flange when the driving force transmitting member is engaged with the driving force receiving unit.

In some embodiments, the engagement portion is an elastic buckle or an elastic protrusion.

In some embodiments, the number of the engaging portions is plural, and the plural engaging portions are arranged in an annular array on the driving force receiving unit.

The utility model has the beneficial effects that: the driving force receiving unit of the processing box is provided with the clamping part which is used for clamping the driving force transmitting member when the driving force transmitting member is jointed with the driving force receiving unit, so that the driving force receiving unit is prevented from being separated from the driving force transmitting member, and the power transmission is more stable.

Drawings

FIG. 1 is a schematic diagram of a conventional electronic imaging device;

fig. 2 is an exploded schematic view of a driving force transmission unit of a conventional electronic imaging device;

FIG. 3 is a schematic view of a conventional first brake force engagement member and brake force transmission member;

fig. 4 is a sectional view of a conventional driving force transmission unit;

fig. 5 is a cut-away perspective view of a conventional driving force transmission unit;

fig. 6 is a schematic structural view of a conventional driving force transmission unit;

fig. 7 is a perspective view of a process cartridge according to a first embodiment of the present utility model;

fig. 8 is an exploded view of a process cartridge according to a first embodiment of the present utility model;

Fig. 9 is a schematic structural view of a driving force receiving unit of a photosensitive drum according to the first embodiment of the present utility model;

fig. 10 is a schematic view showing a structure in which a driving force receiving unit provided in the first embodiment of the present utility model has a driving force receiving member removed;

fig. 11 is a sectional view of a driving force receiving unit provided in the first embodiment of the present utility model;

fig. 12 is a schematic structural diagram of a driving force receiving unit and a driving force transmitting unit in an electronic imaging device in an initial position according to an embodiment of the present utility model;

FIG. 13 is an enlarged partial schematic view of FIG. 12A;

fig. 14 is a schematic view showing a configuration of a driving force receiving member engaged with a driving force transmitting unit in an electronic imaging device according to the first embodiment of the present utility model;

FIG. 15 is an enlarged partial schematic view at B in FIG. 14;

fig. 16 is a schematic structural view of a driving force receiving member and a driving force transmitting unit in an electronic imaging device in a second position according to the first embodiment of the present utility model;

fig. 17 is a schematic view of a driving force receiving member and a driving force transmitting unit in an electronic imaging device in a second position from another perspective in accordance with the first embodiment of the present utility model;

fig. 18 is a schematic structural view of a driving force receiving unit of a photosensitive drum according to a second embodiment of the present utility model;

Fig. 19 is a schematic view showing a configuration of a driving force receiving member according to the second embodiment of the present utility model mated with a driving force transmitting unit in an electronic imaging device;

fig. 20 is a schematic structural view of a driving force receiving member and a driving force transmitting unit in an electronic imaging device in a second position according to a second embodiment of the present utility model;

fig. 21 is a schematic structural view of a driving force receiving unit of a photosensitive drum according to a third embodiment of the present utility model;

fig. 22 is a sectional view of a third driving force receiving unit according to an embodiment of the present utility model;

fig. 23 is a cross-sectional view showing successful engagement of the driving force receiving member with the driving force transmitting unit in the electronic imaging device in the third embodiment of the present utility model;

fig. 24 is a schematic view showing a structure in which a driving force receiving member and a driving force transmitting unit in an electronic imaging device are located at initial positions in accordance with a fourth embodiment of the present utility model;

fig. 25 is a perspective view of a driving force receiving unit in a fourth embodiment of the utility model;

fig. 26 is a perspective view of a driving force transmission unit in a fourth embodiment of the present utility model;

fig. 27 is a perspective view of a driving force receiving unit in a fifth embodiment of the utility model;

FIG. 28 is an enlarged schematic view of the structure of FIG. 27 at position C;

fig. 29 is a schematic view showing a structure in which a driving force receiving member and a driving force transmitting unit in an electronic imaging device are located at initial positions in a sixth embodiment of the present utility model;

Fig. 30 is a perspective view of a driving force receiving unit in a sixth embodiment of the utility model.

Detailed Description

The present utility model will now be described in further detail with reference to the accompanying drawings, wherein the embodiments described are some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be noted that the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implying a number of technical features being indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and include, for example, either fixedly attached, detachably attached, or integrally formed; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

In the above description, descriptions of the terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

Example 1

As shown in fig. 1, there is an electronic imaging device M which is basically the same in structure and principle as the electronic imaging device M disclosed in the CN113574469a patent, and only a brief description will be made below regarding a portion of the electronic imaging device, and in the following description, reference numerals which are the same as those of the CN113574469a patent belong to the same components, and have the same structure and operation principle.

The electronic image forming apparatus M includes a main assembly 170, a drawer 171, and a door cover 11, the main assembly 170 having a receiving portion, a driving force transmitting unit 203, a separating mechanism, a transfer unit, and the like provided therein, the drawer 171 being capable of receiving the process cartridge 100 and moving relative to the main assembly 170 to mount the process cartridge 100 into the receiving portion of the main assembly 170. The door cover 11 is provided at an outer side of the main assembly 170, and is capable of opening or closing the receiving part of the main assembly 170.

As shown in fig. 2 to 6, the driving force transmitting unit 203 provided on the main assembly 170 includes a driving force transmitting assembly including a rotating member 201 and a driving force transmitting member 180, the rotating member 201 being rotatably supported on a support shaft 202, one end of the driving force transmitting member 180 being provided with a rotation stopping portion 180b for receiving driving force, the other end being provided with a driving force transmitting portion 180d, the driving force transmitting member 180 being movably fitted on the rotating member 201 in the axial direction M1, the rotation of the driving force transmitting member 180 being effected by cooperation between the rotation stopping portion 201b provided on the rotating member 201 and the rotation stopping portion 180b provided on the driving force transmitting member 180.

The braking force application assembly includes a braking member 206, a first braking force engagement member 204, a second braking force engagement member 208, a first engagement spring 211, a fourth elastic piece 210, and a braking force transmission member 207, wherein the braking member 206 includes a fixed side 206a and a rotating side 206b, the fixed side 206a is fixedly connected with the support shaft 202, the rotating side 206b is rotatable relative to the fixed side 206a and generates a braking force, and a method of generating a braking force may be appropriately selected from those using friction and viscosity.

The first braking force engagement member 204 and the second braking force engagement member 208 are for applying braking force to the process cartridge 100, and may be assembled together in such a manner that the rotation stop protrusion 208c and the rotation stop recess 204c are engaged, and may have synchronized action. The second braking force engagement member 208 is located inside the first braking force engagement member 204, and the engagement portion 204b of the first braking force engagement member 204 can be fitted to or abutted against the driving force transmission portion 180 d.

The shaft portion 207b of the braking force transmitting member 207 passes through the through holes in the middle of the first and second braking force engaging members 204 and 208 and is connected to the rotation side 206b of the braking member 206 so as to be able to transmit braking force to the first and second braking force engaging members 204 and 208.

Specifically, the flange portion 207a of the braking force transmitting member 207 is provided with a projection 207e, and the corresponding projection 204e is provided at the flange portion 204a of the first braking force engaging member 204, and when the projection 207e of the braking force transmitting member 207 is engaged with the projection 204e of the first braking force engaging member 204, the braking force transmitting member 207 can transmit braking force to the first braking force engaging member 204.

The first and second braking force engagement members 204, 208 are movable in the axial direction M1 with respect to the braking force transmission member 207 and the braking member 206, and the second and first braking force engagement members 208, 204 will not receive braking force when the protrusion 207e of the braking force transmission member 207 is offset or separated from the protrusion 204e of the first braking force engagement member 204 in the axial direction M1.

Continuing, referring to fig. 4 and 5, one end of the first engagement spring 211 is pressed against the end face 206d of the brake member 206, and the other end is pressed against the flange portion 204a of the first braking force engagement member 204, the first engagement spring 211 is in a compressed state, which applies an elastic force to the first braking force engagement member 204 in the M1B direction.

The second engagement spring 210 is a compression coil spring, and is provided so as to be sandwiched and compressed between the end surface 206d of the brake member 206 and the flange portion 207a of the brake force transmitting member 207, the second engagement spring 210 applying a repulsive force (urging force, elastic force) to each of the end surface 206d of the brake member 206 and the flange portion 207a of the brake force transmitting member 207.

Among the components of the drive transmission unit 203 described above, the protrusion 207f at the end of the braking force transmission member 207 in the axial direction M1A abuts against the contact surface 180f of the driving force transmission member 180 under the action of the first engagement spring 211 and the second engagement spring 210. The movement of the driving force transmitting member 180 in the arrow M1B direction is regulated (restricted) by the axial direction restricting portion 212 so that the driving force transmitting member 180 does not fall off from the main assembly 170 side driving force transmitting unit 203.

Among the above-described components of the drive transmission unit 203, the drive force transmission member 180 is movable in the directions M1A and M1B with respect to the rotation member 201, and the first braking force engagement member 204 and the second braking force engagement member 208 are movable in the directions M1A and M1B with respect to the braking force transmission member 207 and the rotation member 201, and are also movable in the directions M1A and M1B with respect to the drive force transmission member 180.

Specifically, as shown in fig. 6 after the assembly of the components of the drive transmission unit 203 is completed, with the positioning boss 180i of the drive force transmission member 180 as the axis, the second braking force engagement member 208 is closer to the positioning boss 180i than the first braking force engagement member 204, and the second braking force engagement member 208 is further provided with an inward protrusion 208e extending toward the positioning boss 180 i. The first braking force engagement member 204 and the driving force transmission portion 180d are located within the same radius range as viewed in the axial direction of the driving force transmission member 180, and since the second braking force engagement member 208 is located inside the first braking force engagement member 204, the second braking force engagement member 208 and the driving force transmission portion 180d are located within different radius ranges. Further, a connecting portion 189 is also provided between the driving force transmitting portion 180d and the positioning boss 180i, wherein the connecting portion 189 does not interfere with the first braking force engagement member 204 and the second braking force engagement member 208, and the connecting portion 189 is integrally movable with the driving force transmitting portion 180 d.

As shown in fig. 7 and 8, the present embodiment also provides a process cartridge 100 detachably mountable to an electrophotographic apparatus M, the process cartridge 100 including a drum unit 108 and a developing unit 109, the drum unit 108 and the developing unit 109 being connected in a relatively rotatable manner therebetween. Wherein the drum unit 108 includes a drum holding frame 115 (one of the process cartridge housings) and the photosensitive drum 104 rotatably supported on the drum holding frame 115.

The developing unit 109 includes a developing frame 125 (one of the process cartridge housings) and a developing roller 106 rotatably supported on the developing frame 125, the developing roller 106 and the photosensitive drum 104 facing each other to enable a developing operation.

As shown in fig. 9 to 11, one end of the photosensitive drum 104 is provided with a driving force receiving unit 14, wherein the driving force receiving unit 14 may be directly connected or indirectly connected to the photosensitive drum 104, and in this embodiment, the driving force receiving unit 14 is directly connected to the photosensitive drum 104. Specifically, the driving force receiving unit 14 is provided with a shaft portion 147 at its central shaft position and a shutter 144 provided outside the shaft portion 147, wherein the shutter 144 is for contacting the second braking force engagement member 208 to block the protruding portion of the driving force transmitting unit 203 from entering in the axial direction. Further, the driving force receiving unit 14 has a protruding portion protruding outward from the shaft portion 147 in the direction of the axis L of the photosensitive drum 104. The projection has a guide portion, which is a first guide portion 1451 and a second guide portion 1452, the first guide portion 1451 being located on the upstream side of the second guide portion 1452 in the rotational direction (arrow G direction), and the first guide portion 1451 being adjacent to the shutter 144, and the braking force receiving portion 146 being a side surface facing the downstream side in the rotational direction G. As shown in fig. 10, a notch 149 is also provided in the end face 141 of the driving force receiving unit 14.

In order to receive the driving force from the driving force transmitting unit 203 in the electronic imaging device, a driving force receiving member 410 is further provided on the driving force receiving unit 14. Specifically, the driving force receiving member 410 is an elongated rod member, a first end 411 of which is fixedly connected to the top plate 420 disposed inside the photosensitive drum 104, and a second end 412 of which is exposed to the outside of the driving force receiving unit 14 through the slot 149, and the driving force receiving member 410 is movable in the axial direction in the photosensitive drum 104 after being subjected to an external force, thereby driving the top plate 420 to axially move inside the photosensitive drum 104. Further, the second end 412 of the driving force receiving member 410 is provided with an abutment surface 4122, a first inclined surface 4121 and a second inclined surface 4123. Wherein the abutment surface 4122 is a plane parallel to the end surface 141 and is located between the first and second inclined surfaces 4121, 4123. The first inclined surface 4121 and the second inclined surface 4123 are both inclined surfaces with respect to the axis L of the photosensitive drum 104, and the inclination directions of the two are not the same.

The driving force receiving unit 14 further includes a first elastic member 440 and a second elastic member 450, wherein the first elastic member 440 is sleeved on the driving force receiving member 410, one end of the first elastic member is abutted against the inner wall of the driving force receiving unit 14, and the other end of the first elastic member is abutted against the driving force receiving member 410. The second elastic member 450 is installed in the inner cavity of the photosensitive drum 104, and one end thereof is in contact with the top plate 420 and the other end thereof is in contact with the bottom plate 430, so that the driving force receiving member 410 can be maintained in an extended state by the elastic forces of the first elastic member 440 and the second elastic member 450. Alternatively, the first elastic member 440 and the second elastic member 450 may employ springs.

Next, a description will be given of the engagement process of the driving force receiving unit 14 and the driving force transmitting unit 203 in the electronic imaging device.

As shown in fig. 12 and 13, when the process cartridge is mounted in the electronic imaging device, the door cover 11 of the electronic imaging device is closed, and the driving force transmitting unit 203 in the electronic imaging device is moved toward the driving force receiving unit 14 of the process cartridge in the direction of M1B and gradually moved to a position in contact with the driving force receiving unit 14. At this time, the shutter 144 abuts against the inward projection 208e of the second braking force engagement member 208 so that the second braking force engagement member 208 and the first braking force engagement member 204 stop moving toward the photosensitive drum 104, and since the driving force transmission portion 180d and the shutter 144 are not in the same radial range, the shutter 144 does not interfere with the driving force transmission portion 180d, and thus the other components in the driving force transmission unit 203 are still moving toward the driving force receiving unit 14 in the direction of M1B, the position where the shutter 14 abuts against the second braking force engagement member 208 is referred to as an initial position, i.e., the position where the driving force receiving unit 14 abuts against the driving force transmission unit 203 is referred to as an initial position.

As shown in fig. 14 and 15, since the shutter 144 blocks the first and second braking force engagement members 204 and 208 from continuing to move in the M1 direction, the first braking force engagement member 204 at this time is disconnected from the braking force transmission member 207, and the first and second braking force engagement members 204 and 208 can be shifted to a state of rotation without receiving the rotational load of the braking member 206. At this time, in order to complete the engagement of the driving force transmitting unit 203 and the driving force receiving unit 14, the driving force transmitting unit 203 further rotates from the abutting state, the driving force transmitting portion 180d starts to rotate around the rotation direction G, and pushes the first braking force engaging member 204 abutting thereto to rotate together, the first braking force engaging member 204 is forced to drive the second braking force engaging member 208 engaged therewith to rotate synchronously, the second braking force engaging member 208 moves along the first guide portion 1451 to a position contacting the first inclined surface 4121 of the driving force receiving member 410, and gives the driving force receiving member 410 a force in the direction of M1B to retract, and as the driving force transmitting unit 203 rotates and approaches the photosensitive drum 104, the second braking force engaging member 208 moves to a position engaged with the braking force receiving portion 146 after passing through the first inclined surface 4121, the abutting surface 4122, the second inclined surface 4123, and the second guide portion 1452 in this order. As shown in fig. 16 and 17, in this state, the first braking force engagement member 204 is separated from the driving force transmission portion 180d by a certain gap, and since the second braking force engagement member 208 no longer interferes with the driving force transmission member 410, the driving force transmission member 410 is restored to the extended state by the urging force of the first elastic piece 440 and the second elastic piece 450 and is inserted into a position abutting against the connecting portion 189, whereby the driving force receiving unit 14 abuts against the connecting portion 189 through the driving force receiving member 410 to receive driving force from the driving force transmission member 180, and engages with the second braking force engagement member 208 through the braking force receiving portion 146 to receive braking force, and driving force transmission between the driving force transmission unit 203 and the driving force receiving unit 14 is achieved.

By the structure in which the driving force receiving member 410 directly abuts against the connecting portion 189 in the driving force transmitting member 180 to receive the power, the engagement of the driving force transmitting member 180 and the driving force receiving member 410 can be made more stable, the disengagement is less likely, and the power transmission is more stable.

Example two

The process cartridge of the present embodiment is substantially the same as the process cartridge of the first embodiment in structure, and the same points are not described in detail, and the differences are mainly described below.

As shown in fig. 18, one end of the photosensitive drum 104 is provided with a driving force receiving unit B14, and specifically, the driving force receiving unit B14 includes a shaft portion B147, a shutter B144, and a guide portion B145, wherein a braking force receiving portion B146 is also provided extending along one end of the guide portion B145, the B146 being a side surface facing the downstream side in the rotation direction G. Further, the driving force receiving unit B14 further includes a driving force receiving member B410, unlike the embodiment in which the driving force receiving member B410 is a protrusion protruding outward from the end face B141 of the driving force receiving unit B14, and the driving force receiving member B410 is provided with a driving force receiving portion B411 outwardly in the axial direction of the photosensitive drum 104, the driving force receiving portion B411 being a surface inclined with respect to the axis L of the photosensitive drum 104, the height of which gradually increases toward the end face B141 in the rotation direction G of the driving force receiving unit B14. The driving force receiving member B410 and the guide portion B145 are not located within the same radial range, i.e., the driving force receiving member B410 is farther from the axis L than the guide portion B145 in the radial direction. Preferably, in order to avoid interference of the driving force receiving member B410 with the driving force transmitting unit 203 when not engaged with the driving force transmitting unit 203, the driving force receiving member B410 may be axially moved by providing an elastic piece (not shown) in the driving force receiving unit B14.

As shown in fig. 19, when the process cartridge is mounted in the electrophotographic image forming apparatus, the door is closed, the driving force transmitting unit 203 gradually moves toward the photosensitive drum 104 in the direction M1B, and when the driving force transmitting member 180 moves to abut against the driving force receiving unit B14, since the driving force transmitting unit 203 continues to move in the direction M1B, the guide portion B145 at this time presses the second braking force engaging member 208 and prevents the second braking force engaging member 208 and the first braking force engaging member 204 from continuing to move in the direction M1B, and the second braking force engaging member 208 and the first braking force engaging member 204, which are no longer subjected to the rotational load of the braking member 206, move along the guide portion B145 toward the downstream side in the rotational direction G.

As shown in fig. 20, when the second braking force engagement member 208 moves to engage with the braking force receiving portion B146, the driving force receiving portion B411 of the driving force receiving member B410 also simultaneously abuts on the inclined surface of the first braking force engagement member 204, and at this time, the driving force receiving member B410 is in a state capable of receiving the braking force from the second braking force engagement member 208.

As the driving force transmitting member 180 rotates in the rotation direction G, the driving force transmitting portion 180d also moves toward the first braking force engagement member 204 in the rotation direction G, thereby abutting against the first braking force engagement member 204 and pushing the first braking force engagement member 204 to rotate, and the driving force receiving member B410 can receive the driving force from the first braking force engagement member 204 due to the integral rotation of the first braking engagement member 204 and the second braking engagement member 208. At this time, the driving force receiving member B410 is successfully engaged with the driving force transmitting unit 203 in the electronic imaging device, and the driving force receiving member B410 is in the second position.

Unlike the first embodiment, the first braking force applying member 204 as a braking force applying member functions as a driving force transmitting member in the present embodiment to transmit a driving force to the driving force receiving member B140.

By the arrangement of the structure, the first braking force applying member 204 drives the driving force receiving unit B14 to rotate, so that the situation that the driving force receiving unit B14 is worn due to the acting force of the driving force transmitting part 180d and the braking force applying component in the imaging working process is avoided, the service life of the driving force receiving unit B14 is prolonged, and the power transmission is more stable.

Example III

The process cartridge of the present embodiment is substantially the same as the process cartridge of the first embodiment in structure, and the same points are not described in detail, and the differences are mainly described below.

As shown in fig. 21 and 22, one end of the photosensitive drum 104 is provided with a driving force receiving unit C14, and specifically, the driving force receiving unit C14 includes a shaft portion C147, a shutter C144, and a guide portion C145, wherein a through hole C149 is opened on an end face C141 of the driving force receiving unit C14. In the present embodiment, the construction of the braking force receiving portion is eliminated, i.e., a plane perpendicular to the axis L is provided extending along the guide portion C145 in the rotation direction G, which is unable to receive braking force from the braking force engagement assembly.

Specifically, the driving force receiving unit C14 includes a driving force receiving member C411, wherein the driving force receiving member C411 is disposed to move in the direction of the axis L. The driving force receiving unit C411 further includes a pressing member C412, a top plate C413, a supporting portion C414, and a bottom plate C415. Preferably, the pressing member C412 is provided in the shaft portion C147 and movable in the direction of the axis L, and the third elastic member C440 passes through the center hole of the top plate C413 and abuts against the pressing member C412 and the supporting portion C414, respectively, to apply elastic force to the pressing member C412 and the supporting portion C414. The fourth elastic member C450 is provided in the photosensitive drum 104, and has one end abutting against the supporting portion C414 and the other end abutting against the bottom plate C415. The pressing member C412 is kept in an extended state by the elastic forces of the third elastic member C440 and the fourth elastic member C450 without being subjected to an external force.

Further, the driving force receiving unit C14 further includes a movable member C416, the driving force receiving member C411 is movably connected to the supporting portion C414 through the movable member C416, and the fifth elastic member C460 is sleeved on the driving force receiving member C411 and abuts against the top plate C413. One end of the driving force receiving member C411 may be exposed in the through hole C149 through the positioning hole C4131 of the top plate C413. A sixth elastic member C470 is further provided between the movable member C416 and the support portion C414 for providing an elastic force for restoring the movable member C416 to an original state.

In the present embodiment, the number of driving force receiving members C411 is four, two of which are arranged axisymmetrically in a group. Since the driving force transmitting portion 180d of the driving force transmitting member 180 has an axisymmetric structure, the driving force receiving members C411 are provided in a pair of structures, and can be engaged with the driving force transmitting portion 180d to perform power transmission in a similar manner.

As shown in fig. 23, when the process cartridge is mounted in the electrophotographic apparatus, the door is closed, the driving force transmitting unit 203 is moved toward the photosensitive drum 104 in the direction of M1B, the guide portion C145 abuts against the second braking force engaging member 208, so that the second braking force engaging member 208 is moved toward the direction of M1A with respect to the other components of the driving force transmitting unit 203, is no longer subjected to the rotational load of the braking member 206, is moved toward the downstream side in the rotational direction G along the guide portion C145, and since the first braking force engaging member 204 and the second braking force engaging member 208 are integrally rotated, the first braking force engaging member 204 and the second braking force engaging member 208 are also synchronously moved, so that a gap is generated between the driving force transmitting portion 180d and the first braking force engaging member 204, at this time, with the movement of the driving force transmitting unit 203, the positioning boss 180i abuts against the pressing piece C412, and causes the pressing piece C412 to move in the shaft portion C147 along the direction M1B, thereby compressing the third elastic piece C440 and the supporting portion C414, the movable piece C416 is forced to move the driving force receiving member C411 along the direction M1A, the driving force receiving member C411 protrudes from the through hole C149 and sandwiches the driving force transmitting portion 180d, that is, the driving force transmitting portion 180d is located between the two driving force receiving members C411, and as the driving force transmitting unit 203 rotates around the rotation direction G, the driving force receiving member C411 abuts against the driving force transmitting portion 180d and receives driving force therefrom, enabling power transmission between the driving force transmitting unit 203 and the driving force receiving unit C14. Since the braking force receiving portion is eliminated in the present embodiment, the first braking force engagement member 204 and the second braking force engagement member 208 do not apply braking force to the driving force receiving unit C14 during power transmission.

Alternatively, in the present embodiment, the driving force receiving member C411 is provided so as to sandwich the driving force transmitting portion 180d in an axially moving structure, but the driving force receiving member C411 is not necessarily limited to this structure, and a structure in which the driving force receiving member C411 is provided to move radially may be provided, and power transmission may be achieved as well with the driving force transmitting portion 180 d.

Example IV

The process cartridge of the present embodiment is substantially the same as the process cartridge of the first embodiment in structure, and the same points are not described in detail, and the differences are mainly described below.

Referring to fig. 24 to 26, one end of the photosensitive drum 104 is provided with a driving force receiving unit 14, wherein the driving force receiving unit 14 may be directly connected or indirectly connected to the photosensitive drum 104, and in this embodiment, the driving force receiving unit 14 and the photosensitive drum 104 are directly connected. Specifically, the driving force receiving unit 14 is provided with a shaft portion D147 of a hollow structure and a shutter D144 provided outside the shaft portion D147, wherein the shutter D144 is for contacting the second braking force engagement member 208 to block the protruding portion of the driving force transmitting unit 203 that enters in the axial direction. The driving force receiving unit 14 is further provided with a guide portion D1453, and one end of the guide portion D1453 abuts against the shutter D144.

Further, the driving force receiving unit 14 has a protrusion portion D148 protruding outward from the shaft portion D147 in the axial direction of the photosensitive drum 104, a side surface of the protrusion portion D148 on the upstream side in the rotation direction G is a driving force receiving surface D1455, a side surface of the protrusion portion D148 on the downstream side in the rotation direction G is a first plane D1454 perpendicular to the end face 141 of the driving force receiving unit 14, wherein the driving force receiving surface D1455 is for abutting against the driving force transmitting portion 180D to receive the driving force, the first plane D1454 is a vertical plane, and cannot be engaged with the first braking force engaging member 204 and the second braking force engaging member 208, that is, the driving force receiving unit 14 cannot receive the braking force of the braking force applying assembly.

In some embodiments, the driving force receiving unit 14 is further provided with an engaging portion for engaging with the driving force transmitting member 180 when the driving force receiving unit 14 is engaged with the driving force transmitting member 180, preventing the two from being separated. Specifically, the engaging portion is a first fastening structure D151 disposed on the shaft portion D147, two first fastening structures D151 disposed on the shaft portion D147 are disposed on an end portion (one end toward the driving force transmission member 180) of the shaft portion D147, and the two first fastening structures D151 are mounted on the shaft portion D147 to be elastically deformable, that is, the first fastening structures D151 are elastic fastening structures, and the first fastening structures D151 can fasten the positioning boss 180i of the driving force transmission member 180 by elastically deformed force.

The first engaging structure D151 is further provided with a guide slope D152, so that the positioning boss 180i of the driving force transmitting member 180 can be guided by the guide slope D152 to slide into the shaft portion D147 when the positioning boss is fitted into the shaft portion D147. Specifically, the guiding inclined surface D152 is disposed at the front end (toward one end of the driving force transmission member 180) of the first fastening structure D151 and is inclined toward the inner wall of the shaft portion D147, so that when the positioning boss 180i is embedded in the shaft portion D147, the positioning boss 180i is guided by the guiding inclined surface D152, passes between the two first fastening structures D151 and pushes the two first fastening structures D151 to elastically deform, and the two first fastening structures D151 clamp the positioning boss 180i under the action of the elastic deformation.

Further, two first catching structures D151 are disposed in a ring-shaped array on the driving force receiving unit 14. Specifically, in the present embodiment, the two first engaging structures D151 are disposed on the shaft portion D147 in an annular array with the axis L of the shaft portion D147 as the center. Alternatively, in some other embodiments, a plurality of first fastening structures D151 may be provided, and the plurality of first fastening structures D151 may be provided on the shaft in an annular array with the axis L of the shaft D147 as a center, and may be used to clamp the positioning boss 180i embedded in the shaft D147, where the number is not limited.

In order to receive the driving force from the driving force transmitting unit 203 in the electronic imaging device, the engagement process of the driving force receiving unit 14 and the driving force transmitting unit 203 in the electronic imaging device is described next.

When the process cartridge is mounted in the electronic imaging device, the door cover 11 of the electronic imaging device is closed, and the driving force transmitting unit 203 in the electronic imaging device is moved toward the driving force receiving unit 14 of the process cartridge in the direction of M1B and gradually moved to a position in contact with the driving force receiving unit 14. At this time, the shutter D144 abuts against the inward projection 208e of the second braking force engagement member 208 so that the second braking force engagement member 208 and the first braking force engagement member 204 stop moving toward the photosensitive drum 104, and since the driving force transmission portion 180D and the shutter D144 are not in the same radial range, the shutter D144 does not interfere with the driving force transmission portion 180D, and thus the other components in the driving force transmission unit 203 are still moving toward the driving force receiving unit 14 in the direction of M1B, the position where the shutter D144 abuts against the second braking force engagement member 208 is referred to as an initial position, i.e., the position where the driving force receiving unit 14 abuts against the driving force transmission unit 203 is referred to as an initial position.

As shown in fig. 24, since the shutter D144 blocks the first and second braking force engagement members 204 and 208 from continuing to move in the M1B direction, the first braking force engagement member 204 at this time is disconnected from the braking force transmission member 207, and the first and second braking force engagement members 204 and 208 can be shifted to a state of rotation without receiving the rotational load of the braking member 206. At this time, in order to complete the engagement of the driving force transmitting unit 203 and the driving force receiving unit 14, the driving force transmitting unit 203 further rotates from the abutting state, the driving force transmitting portion 180D starts rotating around the rotation direction G, and pushes the first braking force engaging member 204 abutting thereto to rotate together, the first braking force engaging member 204 is forced to drive the second braking force engaging member 208 engaged therewith to rotate synchronously, the second braking force engaging member 208 moves to a position on the side of the first plane D1454 along the guide portion D1453, and as the driving force transmitting unit 203 rotates and approaches toward the photosensitive drum 104, as shown in fig. 25 and 26, the protrusion portion D148 enters into the gap 220 between the first braking force engaging member 204 and the driving force transmitting portion 180D, and at this time, the driving force receiving surface D1455 of the protrusion portion D148 abuts against the driving force transmitting portion 180D to receive the driving force from the driving force transmitting member 180, and since the first plane D1454 is a vertical plane, the shape of which does not engage with the first braking force engaging member 204 and the second braking force engaging member 208, and the first braking force engaging member 208 do not receive the braking force engaging member 208 from the first plane D1454. And in the process that the driving force transmitting unit 203 moves towards the driving force receiving unit 14, the positioning boss 180i is guided into the embedded shaft portion D147 through the guiding inclined plane D152, and the positioning boss 180i can be clamped by the two first clamping structures D151, so that the phenomenon that the driving force receiving unit 14 is separated from the driving force transmitting unit 203 in the driving force transmitting process is avoided.

By providing a structure in which the positioning boss 180i is clamped by the engagement portion, the engagement of the driving force transmitting member 180 with the driving force receiving unit 14 can be made more stable, and the disengagement is less likely to occur, so that the power transmission is made more stable.

Example five

The process cartridge of the present embodiment is substantially the same as the process cartridge of the fourth embodiment in structure, and the same points are not described in detail, and the differences are mainly described below.

Referring to fig. 27 and 28, the other structures of the driving force receiving unit 14 of the present embodiment are the same as those of the fourth embodiment, and the main difference is in the structure of the engaging portion. Specifically, in the present embodiment, the shaft portion E147 is hollow, and the engagement portion is a second engagement structure E151 provided on the inner side wall of the shaft portion E147 so as to protrude toward the center of the axis L, and when the positioning boss 180i is fitted into the shaft portion E147, the engagement portion can be gripped by the second engagement structure E151.

Specifically, in the present embodiment, two second fastening structures E151 are disposed on the inner side wall of the shaft portion E147, two second fastening structures E151 are disposed opposite to each other on the inner side wall of the shaft portion, and the distance between the two second fastening structures E151 is slightly smaller than the diameter of the positioning boss 180i, so that when the positioning boss 180i is embedded into the shaft portion E147, the driving force transmitting member 180 can be clamped by the two second fastening structures E151, so that the driving force receiving unit 14 cannot be easily moved when the driving force transmitting member 180 is connected.

Alternatively, the second fastening structure E151 may be an elastic protrusion, where the positioning boss 180i is pressed to deform when being embedded in the shaft portion E147, and the elastic protrusion is tightly held against the outer surface of the positioning boss 180i after being deformed.

Alternatively, the number of the second catching structures E151 may be set greater, and the plurality of second catching structures E151 are disposed on the inner sidewall of the shaft portion E147 in the rotation direction G.

Further, the second fastening structure E151 is further provided with a guiding inclined plane E152, so that when the positioning boss 180i is embedded in the shaft portion E147, the positioning boss can slide into the shaft portion E147 through guiding the guiding inclined plane E152. Specifically, in the present embodiment, the guide inclined surface E152 is provided on the side surface of the second engagement structure E151 in the axial L direction of the shaft portion E147, inclined toward the axial L of the shaft portion D147, and provided on the front side of the second engagement structure E151 in the M1A direction, so that when the positioning boss 180i is fitted into the shaft portion E147, it is guided by the guide inclined surface E152 first, thereby entering into the shaft portion E147 to be gripped by the two second engagement structures E151.

Example six

The process cartridge of the present embodiment is substantially the same as the process cartridge of the fourth embodiment in structure, and the same points are not described in detail, and the differences are mainly described below.

Referring to fig. 29 and 30, the other structures of the driving force receiving unit 14 of the present embodiment are the same as those of the fourth embodiment, and the main difference is in the structure of the engaging portion and the structure of the driving force transmitting member 180 engaged with the engaging portion. Specifically, in the present embodiment, the engaging portion is provided on one end of the photosensitive drum 104 and is located outside the driving force receiving unit 14, a ring-shaped flange 180h is provided on the driving force transmitting member 180, and when the driving force transmitting member 180 is engaged with the driving force receiving unit 14, the flange 180h extends in the M1B direction on the driving force transmitting member 180 near one end of the driving force receiving unit 14, and the engaging portion can be clamped on the outer surface of the flange 180h to prevent the two from being separated, so that the driving force transmitting member 180 can be kept stably engaged with the driving force receiving unit 14. Specifically, in the present embodiment, the engaging portion is a third click structure F151 provided on one end of the driving force receiving unit 14, wherein the third click structure F151 is provided on the outermost circumferential surface of the driving force receiving unit 14 and extends on the axis L, that is, one end of the third click structure F151 is connected to the outermost circumferential surface of one end of the driving force receiving unit 14 in the direction M1A, and the other end extends in a direction close to the driving force transmitting member 180 (that is, extends in the direction M1A). The third fastening structure F151 is an elastic fastener. Further, the number of the third fastening structures F151 in the present embodiment is three, and the three third fastening structures F151 are uniformly arranged along the rotation direction G. When the driving force transmitting member 180 is engaged with the driving force receiving unit 14, the flange 180h on the driving force transmitting member 180 falls between the three third catching structures F151, and can be caught by the three third catching structures F151, so that the driving force transmitting member 180 does not easily move when connected to the driving force receiving unit 14.

Further, the third fastening structure F151 is further provided with a guiding inclined plane F152, so that the positioning boss 180i can slide into the shaft portion F147 through the guiding inclined plane F152 when the positioning boss is inserted into the shaft portion F147. Specifically, in the present embodiment, the guide slope F152 is provided on the front side of the third catching structure F151, that is, on the front side of the third catching structure F151 in the M1A direction, and is inclined toward the axis L of the shaft portion F147, so that when the flange 180h is fitted between the three third catching structures F151, first, guided by the guide slope F152 and pushed against the three third catching structures F151 to be elastically deformed, the three third catching structures F151 clamp the outer surface of the flange 180h under the force of their elastic deformation, preventing the driving force receiving unit 14 from being disengaged from the driving force transmitting member 180.

Alternatively, the number of the third catching structures F151 may be set greater or smaller, with a minimum of two, and the plurality of third catching structures F151 may be disposed on the outermost circumferential surface of the driving force receiving unit 14 in the rotation direction G.

What has been described above is merely some embodiments of the present utility model. It will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the spirit of the utility model.

Claims (9)

1. A process cartridge detachably mountable to a main assembly of an electronic image forming apparatus, said main assembly including a driving force transmitting member, said process cartridge comprising:

a housing; a photosensitive drum rotatably supported by the casing;

a driving force receiving unit which is connected with the photosensitive drum and can receive the driving force of the driving force transmission member to drive the photosensitive drum to rotate; the driving force receiving unit includes an engaging portion that engages the driving force transmitting member when the driving force transmitting member is engaged with the driving force receiving unit, for preventing the driving force receiving unit from being disengaged from the driving force transmitting member.

2. A process cartridge according to claim 1, wherein said engaging portion includes a guide slope at an end of said engaging portion toward said driving force transmitting member.

3. A process cartridge according to claim 1 or 2, wherein said driving force receiving unit includes a shaft portion at a position thereof, said engaging portion is provided at said shaft portion, and said engaging portion engages with a positioning boss of said driving force transmitting member when said driving force receiving unit is engaged with said driving force transmitting member.

4. A process cartridge according to claim 3, wherein said engaging portion is provided on one end of said shaft portion toward said driving force transmitting member or on an inner side wall of the shaft portion.

5. A process cartridge according to claim 1 or 2, wherein said engaging portion is provided on a circumferential surface of an outermost side of said driving force receiving unit and extends along an axis of the driving force receiving unit.

6. A process cartridge according to claim 5, wherein said engaging portion is connected at one end to a circumferential surface of said driving force receiving unit outermost toward one end of said driving force transmitting member, and at the other end extends in a direction toward said driving force transmitting member.

7. A process cartridge according to claim 6, wherein said driving force transmitting member is provided with an annular flange, and said engaging portion clamps an outer surface of said flange when said driving force transmitting member is engaged with said driving force receiving unit.

8. A process cartridge according to claim 4 or 6, wherein said engaging portion is an elastic buckle or an elastic projection.

9. A process cartridge according to claim 8, wherein the number of said engaging portions is plural, and a plurality of said engaging portions are arranged in an annular array on said driving force receiving unit.