CN219936282U - Developing device - Google Patents

Abstract

The utility model discloses a developing device, which is detachably mounted on a drum box, and comprises: a case body; a developing roller rotatably supported at the cartridge body; the action piece is movably arranged on the box body and comprises a stress part and a force application part, wherein the stress part can receive the separation force applied by the electronic imaging device, the force application part is used for transmitting the separation force, the guide part is in contact with the drum frame and used for guiding the installation of the developing device, the force pushing part is used for receiving the force pushing force applied by the drum box, the developing roller is in close contact with the photosensitive drum, the matching part is used for receiving the separation force transmitted by the force application part, and in the second direction, the matching part is positioned between the guide part and the force pushing part. By adopting the technical scheme provided by the utility model, the technical problems that the photosensitive drum is polluted by depositing toner on the photosensitive drum caused by long-time contact of the photosensitive drum and the developing roller in the prior art, and the developing roller and/or the developer are accelerated to deteriorate due to long-time friction of the photosensitive drum and the developing roller are solved.

Description

Developing device

Technical Field

The utility model relates to the technical field of electronic imaging, in particular to a developing device.

Background

The developing cartridge is a detachable part widely used in an electronic image forming apparatus. The developing cartridge has a developing roller rotatably provided on the developing cartridge, the developing roller including a developing roller shaft and a main body portion wrapped outside the developing roller shaft. When the electrophotographic apparatus is operated, the developing roller contacts and presses the photosensitive drum, causing the developer on the developing roller to be transferred to the surface of the photosensitive drum forming a specific electrostatic latent image to complete the developing process, but while the electrophotographic apparatus is stopped, the developing roller is still in contact with the photosensitive drum, the developer carried on the developing roller is unnecessarily deposited on the photosensitive drum to contaminate the photosensitive drum, and such developer is also deposited on the recording material (paper), with the result that the recording material is contaminated; and since the photosensitive drum and the developing roller rub against each other for a long time, deterioration of the developing roller and/or the developer may be accelerated. Accordingly, to solve the above technical problems, there is a need for a structure that separates a photosensitive drum from a developing roller during stop of an electrophotographic apparatus to extend the service lives of both.

Disclosure of Invention

According to an aspect of the present utility model, there is provided a developing device detachably mountable to an electronic image forming apparatus including a drum cartridge including a drum frame and a photosensitive drum, the developing device comprising:

a cartridge accommodating a developer therein, the cartridge having a first end and a second end in a first direction and a third end and a fourth end in a second direction;

a developing roller rotatably supported at a third end of the cartridge body, the developing roller including a developing roller shaft extending in a first direction;

the acting piece is movably arranged on the box body and comprises a stress part and a force application part, the stress part can receive the separation force applied by the electronic imaging device, the force application part is used for transmitting the separation force,

a guide portion in contact with the drum frame for guiding the mounting of the developing device,

a pushing part for pushing the developing roller closely to the photosensitive drum by the pushing force exerted by the drum receiving box,

and the matching part is used for receiving the separation force transmitted by the force application part, and is positioned between the guide part and the forced pushing part in the second direction.

In some embodiments, the mating portion is an arcuate protrusion; or the matching part is a convex column; alternatively, the matching part is a blind hole or a groove; alternatively, the mating portion is an arcuate hook portion.

In some embodiments, the force application portion is a card slot, or; the force application part is an arc-shaped bulge; alternatively, the force application part is an arc-shaped hook part.

In some embodiments, the protruding column extends outwards along the first direction, the clamping groove is a U-shaped groove, and the clamping groove is clamped on the protruding column.

In some embodiments, the engaging portion engages with the force applying portion in a hooking manner.

In some embodiments, the acting element comprises at least one translational element that moves linearly relative to the cartridge.

In some embodiments, the acting element comprises a first translation element and a second translation element, the first translation element comprises a force bearing part, when the first translation element receives an external acting force to move, the second translation element is driven to move, and the second translation element comprises a force application part.

In some embodiments, the first translation member and the second translation member are provided with inclined planes or cambered surfaces, and the first translation member and the second translation member drive the second translation member through contact between the inclined planes and the inclined planes or between the inclined planes and the cambered surfaces or between the cambered surfaces and the cambered surfaces.

In some embodiments, the direction of movement of the first translation member and the direction of movement of the second translation member form an angle therebetween.

In some embodiments, the included angle is an acute angle.

In some embodiments, a first sliding rail is arranged on the box body, a first mounting part is arranged on the first translation part, and the first translation part is mounted on the first sliding rail through the first mounting part and can move relative to the first sliding rail;

the box body is provided with a second sliding rail, the second translation part is provided with a second installation part, and the second translation part is installed on the second sliding rail through the second installation part and can move relative to the second sliding rail.

In some embodiments, the developing device further comprises a first collecting member, the guiding part, the pushing part and the matching part are located on the first collecting member, the first collecting member receives the separation force applied by the acting member to move, and the first collecting member moves to drive the developing device to move in a direction away from the photosensitive drum, so that the developing roller is separated from the photosensitive drum.

In some embodiments, the first manifold is connected to the developer roller, the first manifold is made of a conductive material, and the first manifold receives power from the electrophotographic device and transmits power to the developer roller.

In some embodiments, the urging portion is located at the first end of the cartridge body and extends outwardly in a first direction, and in a second direction, the urging portion is further away from the developing roller than the mating portion.

In some embodiments, the developing device further comprises a positioning shaft and a first collecting member, the first collecting member is connected with the developing roller, the matching part is located on the collecting member, the first collecting member receives the separating force applied by the acting member to move, the first collecting member moves to drive the developing device to move away from the photosensitive drum to enable the developing roller to be separated from the photosensitive drum, the positioning shaft protrudes outwards along a first direction, the collecting member is provided with a second hole and a first inserting hole connected with the developing roller shaft, the second hole is further away from the photosensitive drum than the first inserting hole in the second direction, the positioning shaft is inserted into the second hole, and the first collecting member can swing around the positioning shaft.

In some embodiments, the developing device further includes a first collecting member, the engaging portion being located at the first collecting member, the first collecting member being movable relative to the developing device after receiving the separating force applied by the acting member.

The utility model has the beneficial effects that: by adopting the technical scheme provided by the utility model, the separation of the photosensitive drum and the developing roller is realized when the electronic imaging device stops working, and the developing roller is contacted with the photosensitive drum when the electronic imaging device works, so that the technical problems that the photosensitive drum is polluted due to the deposition of the toner on the photosensitive drum caused by the long-time contact of the photosensitive drum and the developing roller, and the degradation of the developing roller and/or the developer is accelerated due to the long-time friction of the photosensitive drum and the developing roller in the prior art are solved.

Drawings

Fig. 1 is a schematic perspective view of a developing device according to a first embodiment of the present utility model;

fig. 2 is a schematic perspective view of another view of a developing device according to an embodiment of the present utility model;

FIG. 3 is a schematic perspective view of a developing device and a drum cartridge according to a first embodiment of the present utility model;

fig. 4 is an exploded perspective view of a first end of a developing device according to a first embodiment of the present utility model;

fig. 5 is a schematic perspective view showing the relative positions of the developing device and the guide member of the drum cartridge during the process of mounting the developing device on the drum cartridge or during the process of removing the developing device from the drum cartridge according to the first embodiment of the present utility model;

FIG. 6 is a schematic perspective view showing the relative position of the developing device and the drum cartridge after the fixing member is removed after the process of installing the developing device in the drum cartridge according to the first embodiment of the present utility model is completed;

FIG. 7 is a schematic perspective view showing the relative positions of the developing device and the drum cartridge after the fixing member is removed when the developing device is in a separated operation;

FIG. 8 is a schematic perspective view of a developing device according to a second embodiment of the present utility model with a fixing member at a first end removed;

FIG. 9 is a schematic view of a partial enlarged structure at A in FIG. 8;

fig. 10 is a side view of a developing device according to a second embodiment of the present utility model;

FIG. 11 is a schematic view showing a structure of a collecting member of a developing device according to a second embodiment of the present utility model;

FIG. 12 is a schematic view showing a partially engaged position of a developing device and a drum cartridge according to a second embodiment of the present utility model;

FIG. 13 is a schematic view of a partially enlarged structure at B in FIG. 12;

FIG. 14 is a schematic view showing a structure of a first collecting member in a guiding position of a drum cartridge before the developing device according to the second embodiment of the present utility model is placed in the drum cartridge;

FIG. 15 is a schematic view of the structure of the first collecting member, the guiding position, the pushing position and the acting force applied to the acting member when the developing device according to the second embodiment of the present utility model is taken out;

FIG. 16 is a schematic view showing a fitting structure of a developing device according to a third embodiment of the present utility model to a drum cartridge;

fig. 17 is a schematic perspective view of a first collecting member and an acting member of a developing device according to a third embodiment of the present utility model;

Fig. 18 is a schematic perspective view of a developing device according to a fourth embodiment of the present utility model;

FIG. 19 is a perspective view of a developing device and drum cartridge according to a fourth embodiment of the present utility model;

FIG. 20 is an exploded perspective view of a first end of a developing device according to a fourth embodiment of the present utility model;

fig. 21 is a schematic perspective view of a first translation member of a developing device according to a fourth embodiment of the present utility model;

fig. 22 is a schematic perspective view of a second translation member of the developing device according to the fourth embodiment of the present utility model;

fig. 23 is a schematic perspective view showing the relative positions of the developing device and the guide member of the drum cartridge during the process of mounting the developing device on the drum cartridge or during the process of removing the developing device from the drum cartridge according to the fourth embodiment of the present utility model;

FIG. 24 is a schematic cross-sectional view showing the relative positions of the developing device and the guide member of the drum cartridge after the process of mounting the developing device in the drum cartridge according to the fourth embodiment of the present utility model is completed;

fig. 25 is a schematic cross-sectional view showing the relative positions of the developing device and the guide member of the drum cartridge when the developing device of the fourth embodiment of the present utility model is in a separation operation;

FIG. 26 is a partially exploded view of a first end of a developing device according to a fourth embodiment of the present utility model;

FIG. 27 is a partially exploded view of a first end of a modification of the developing device according to the fourth embodiment of the present utility model;

FIG. 28 is a schematic view showing a partially engaged position of a first end of a developing device and a drum cartridge according to a fourth embodiment of the present utility model;

fig. 29 is a schematic view showing a developing device and a drum cartridge in an initial fitting position, and a developing roller and a photosensitive drum being separated;

fig. 30 is a schematic view showing a state where a developing device and a drum cartridge according to the fourth embodiment of the present utility model are in contact with a photosensitive drum (developing cartridge operation) after the developing device and the drum cartridge are completely engaged;

fig. 31 is a schematic view showing a state in which the developing roller is separated from the photosensitive drum (the developing cartridge is not operated) after the acting member of the developing device according to the fourth embodiment of the present utility model receives an external force.

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

Fig. 1 is a schematic perspective view of a developing device according to a first embodiment of the present utility model; FIG. 2 is a schematic perspective view of a developing device according to another embodiment of the present utility model; FIG. 3 is a schematic perspective view of a developing device and a drum cartridge according to an embodiment of the present utility model; as shown in fig. 1 and 2, the developing device 1 includes a cartridge 10, a developing roller 20, a powder feeding roller (not shown), a stirring member (not shown), a driving end cover 30, a transmission assembly 40, a chip 50, a collecting member, an acting member, and a fixing member, the collecting member including a first collecting member 60 and a second collecting member 70; as shown in fig. 3, the developing device 1 is detachably mounted to a drum cartridge 2, and the developing device 1 and the drum cartridge 2 are used in an electrophotographic apparatus, specifically, the drum cartridge 2 includes a drum frame 91, a photosensitive drum 92, a first guide surface 93 (shown in fig. 5), a second guide surface 94 (shown in fig. 5), a first pressing member 95, and a first spring 96.

The cartridge 10 is configured to accommodate developer, the cartridge 10 has a first end 11 and a second end 12 opposite to each other in a first direction, the first collecting member 60, the acting member 110, and the fixing member 120 are located at the first end 11 of the cartridge 10, the second collecting member 70 is located at the second end 12 of the cartridge 10, the developing device 1 is further provided with another acting member 110A, the other acting member 110A is located at the same end of the cartridge 10 as the second collecting member 70, and the second end 12 may be further provided with another fixing member; the cartridge 10 has a third end and a fourth end in the second direction, wherein the third end is also the front end of the cartridge 10, the fourth end is the rear end of the cartridge 10, the cartridge 10 is provided with an opening at the third end, and the external space of the cartridge 10 is communicated with the developer accommodating chamber of the cartridge 10 through the opening; the fourth end is provided with a handle. In addition, the third direction intersects with the first direction and the second direction, and the case 10 has a fifth end and a sixth end in the third direction, wherein the fifth end is also an upper end of the case 10, and the sixth end is a lower end of the case 10.

The developing roller 20 is rotatably installed at the opening position near the third end of the cartridge body 10, the developing roller 20 extends in the first direction, the developing roller 20 includes a developing roller main body 21 and a developing roller shaft 22, and the developing roller 20 is rotatable about a developing roller shaft line extending in the first direction. The toner feeding roller is for feeding the developer contained in the cartridge 10 to the developing roller 20, and the stirring member is for stirring the developer to prevent caking thereof, and feeding the developer to the toner feeding roller.

At the second end 12 of the cartridge 10 is a transmission assembly 40 for receiving and transmitting driving force from the electrophotographic apparatus to other components of the developing apparatus 1, the transmission assembly 40 including a coupling 41, a coupling gear 42, a developing gear 43, a powder feeding gear (not shown), and a stirring gear (not shown). The drive end cover 30 is also positioned at the second end 12 of the housing 10 and is configured to support and protect the drive assembly 40, with the drive end cover 30 at least partially exposing the drive assembly 40; wherein, the drive end protecting cover 30 is provided with a through hole, the coupler 41 is provided with a concave part in the first direction, the coupler 41 is exposed through the through hole, so that the concave part is matched with a driving device in the electronic imaging device to receive the driving force from the electronic imaging device. The drive end cover 30 and the cartridge body 10 together constitute an integral casing of the developing device 1. The drive end cap 30 is mounted to the second end of the housing 10 by, for example, screw fastening, snap fitting, or the like.

The coupling gear 42 is closer to the second end 12 of the cartridge 10 than the coupling 41 in the first direction, the coupling gear 42 transmitting the driving force received from the electrophotographic apparatus to other members of the developing apparatus 1, the coupling 41 being rotatable about a first axis extending in the first direction. The developing gear 43 is attached to one end of the developing roller 20 in the first direction, is engaged with the coupling gear 42, receives a driving force from the coupling 41, and is extendable along a second axis (developing roller axis) extending along the first direction together with the developing roller 20. The powder feeding gear is positioned at one end of the powder feeding roller in the first direction, is meshed with the coupler gear 42, receives the driving force from the coupler 41, and can rotate along with the powder feeding roller around a third axis extending along the first direction; the stirring gear is located at one end of the stirring element in the first direction and also receives a driving force from the coupling 41, and is rotatable together with the stirring element about a fourth axis extending in the first direction.

The second end 12 of the box body 10 may also be provided with a chip 50, where the chip 50 stores information of the developing device and may be electrically connected with the electronic imaging device, so as to realize electrical connection of information such as identification and data exchange between the developing device 1 and the electronic imaging device. The chip 50 is disposed on a side of the cartridge 10 (here, the cartridge includes the gear cover 53) in a first direction near the transmission assembly 40 and at an end of the cartridge in a second direction away from the developing roller 20.

When the developing device 1 receives the driving force, the developer is supplied from the inner chamber of the cartridge 10 to the outer peripheral surface of the developing roller main body 21 via the toner feeding roller. At this time, the developer is triboelectrically charged between the toner feed roller and the developing roller main body 21. Further, a bias voltage is applied to the developing roller shaft 22 of the developing roller 20. Therefore, the developer is attracted to the outer peripheral surface of the developing roller body 21 by the electrostatic force between the developing roller shaft and the developer.

FIG. 4 is an exploded perspective view of a first end of a developing device according to an embodiment of the present utility model; fig. 5 is a schematic perspective view showing the relative positions of the developing device and the guide member of the drum cartridge during the process of mounting the developing device on the drum cartridge or during the process of removing the developing device from the drum cartridge according to the first embodiment of the present utility model; as shown in fig. 4 and 5, the first collecting member 60 is located at the first end 11 of the cartridge body 10, and the first collecting member 60 is rotatably mounted to the other end of the developing roller shaft 22 in the first direction. The first collecting member 60 extends substantially in the second direction, the first collecting member 60 has a first end 61 and a second end 62, the first collecting member 60 extends between the first end 61 and the second end 62 in the second direction, the second end 62 is further from the developing roller 20 than the first end 61 in the second direction, and the second end 62 is further from the third end of the cartridge 10 than the first end 61. During the mounting of the developing device 1 to the drum cartridge 2, the first end portion 61 is in contact with the drum frame 91 and performs a guide mounting action on the developing device 1 so that the developing device 1 is smoothly mounted to the drum cartridge, i.e., the first end portion 61 is a guide portion in this embodiment. The second end 62 can receive the urging force exerted by the drum cartridge 2 so that the developing roller 20 and the photosensitive drum 92 are brought into close contact.

The first collecting member 60 further includes a connecting arm connecting the first end portion 61 and the second end portion 62, the connecting arm including a first arm 63 and a second arm 64, the second arm 64 being farther from the developing roller 20 than the first arm 63, and the second arm 64 being farther from the third end of the cartridge 10 than the first arm 62; in the present embodiment, the first end portion 61 and the second end portion 62 are integrally formed, however, the first end portion 61 and the second end portion 62 may be a separate structure, and in this case, the first end portion 61 and the second end portion 62 may be fixed to each other and connected by a connecting arm.

The first manifold 60 further includes a first insertion hole 65, the first insertion hole 65 being provided in the first end portion 61, the first insertion hole 65 extending in the first direction. The first insertion hole 65 may be a through hole passing through the first end portion 61 in the first direction, and the first insertion hole 65 may also be a blind hole not passing through the first end portion 61, and an end portion of the developing roller shaft 22 in the first direction is inserted into the first insertion hole 65. The first collecting member 60 is rotatable about the developing roller shaft 22 with respect to the cartridge body 10. More specifically, the second end 62 is pivotable relative to the first end 61 about the rotational axis of the developer roller 20.

The first collecting member 60 in this embodiment may also serve as a conductive member and be electrically connected to the developing roller 20, and thus may also be referred to as a developing electrode. The first collecting member 60 may be made of a conductive material such as a conductive resin, a metal material, or the like, without being particularly limited thereto.

The first collecting member 60 further has a fitting portion 66, the fitting portion 66 being located in the connecting arm and extending in the first direction, in this embodiment the connecting arm is provided with a groove structure, the groove passing through the connecting arm in the third direction, the fitting portion 66 being located in the groove and protruding in the first direction away from the case 10; alternatively, the connecting arm is not provided with a groove structure, but the fitting portion 66 is provided as a protruding portion protruding in the first direction compared to the connecting arm. The engaging portion 66 is located between the first end portion 61 and the second end portion 62, and in this embodiment, the engaging portion 66 is provided in a convex pillar structure, preferably a cylindrical protrusion; alternatively, the engaging portion 66 may be provided in any other shape, which is not particularly limited herein. Alternatively, the connecting arm may be configured to have at least two grooves, and the side wall of the groove may be used as the force receiving portion.

The acting element 110 is located at the first end 11 of the box body 10, the acting element 110 is a substantially rod-shaped member, the acting element 110 extends substantially along the third direction, and the acting element 110 has a force receiving portion 111, a force applying portion 112, and a cam surface 113. The force receiving portion 111 is located at one end of the acting element 110 in the third direction, the force applying portion 112 is located at the other end of the acting element 100 opposite to the force receiving portion 111 in the third direction, the cam surface 113 is located between the force receiving portion 111 and the force applying portion 112 in the third direction, the cam surface 113 is closer to the developing roller 20 than the force receiving portion 111 and the force applying portion 112 in the second direction, and the cam surface 113 is preferably an arc surface. In the present embodiment, the force receiving portion 111 is provided as an arc-shaped block, and the force applying portion 112 is provided as a U-shaped locking groove for locking to the outer surface of the engaging portion 66, so that the acting element 110 can be prevented from falling off from the first collecting element 60 in the third direction. Alternatively, the shape of the force application portion 112 may be adjusted according to the shape of the mating portion 66, for example, a rectangular slot or other irregular slot may be formed, which is not limited in particular. In this embodiment, in order to facilitate the engagement of the urging portion 112 with the engaging portion 66, the urging portion 112 may have a certain elasticity, and in other embodiments, may not have elasticity.

The acting element 110 is movable relative to the cartridge 10. When the developing device 1 is mounted on the drum cartridge 2, the cam surface 113 is in contact with the drum frame 91 (as shown below) of the drum cartridge 2. The reaction member 110 is pivotable about the cam surface 113 in contact with the drum frame 91 between a first position and a second position.

The fixing member 120 is located at the first end 11 of the box body 10, the fixing member 120 may be a frame-shaped member with an opening at one end, the fixing member 120 may be mounted on the box body 10 by means of screws, buckles, etc., a part of the acting member 110 is located between the box body 10 and the fixing member 120, and the fixing member 120 is used for holding the acting member 110, so as to prevent the acting member 110 from falling off from the box body 10. Alternatively, the fixing member 120 may be omitted, and a mounting post or a mounting groove may be provided at the first end of the case 10 for mounting the acting member 110 and preventing the acting member 110 from falling off the case 10.

As shown in fig. 2, the second manifold 70 is located at the second end 12 of the cartridge 10, and the first manifold 60 and the second manifold 70 are positioned to overlap each other as viewed in the first direction. The second collecting member 70 rotatably supports the other end of the developing roller shaft 22. The other structures of the second end 12 are similar to those of the first end 11, and the description thereof will be omitted. In other embodiments, the first manifold 60 and the second manifold 70 may not be arranged in overlapping relation, or only one manifold may be arranged.

As shown in fig. 3 and 5, the drum cartridge 2 includes a drum frame 91, a photosensitive drum 92, a first guide surface 93, a second guide surface 94, a first pressing member 95, and a first spring 96, and the developing device 1 is mounted on the drum frame 91. Specifically, the drum frame 91 has a first guide surface 93 and a second guide surface 94, and is located at one end of the drum frame 91 in the second direction for engaging with the first end 61 on the developing device 1 to guide the developing device 1 to be mounted in place during the mounting of the developing device 1 to the drum cartridge 2, the first guide surface 93 and the second guide surface 94 being disposed opposite to each other in the third direction with a track formed therebetween. The photosensitive drum 92 is located at one end of the drum frame 91 in the second direction, and the outer circumferential surface of the developing roller main body 21 is in contact with the outer circumferential surface of the photosensitive drum 92 when the developing device 1 is mounted in place. The first pressing member 95 and the first spring 96 are located at the other end of the drum frame 91 in the second direction, and furthermore, the first pressing member 95 and the first spring 96 are electrically conductive and may be made of an electrically conductive material such as an electrically conductive resin or a metal. The first spring 96 may be stretched and compressed substantially in the second direction, and one end of the first spring 96 is connected to the first pressing piece 95 and the other end is connected to the drum frame 91 in the second direction. When the developing device 1 is mounted on the drum cartridge 2, the first pressing member 95 presses the second end 62 of the first collecting member 60 toward the photosensitive drum 92 by the tension of the first spring 96, that is, the second end 62 in this embodiment acts as a urging portion and receives the urging force exerted by the drum cartridge 2, so that the developing roller 20 and the photosensitive drum 92 are brought into close contact.

It is known that the second end portion 62 of the first collecting member 60 has an arc surface, and the arc surface of the second end portion 62 is abutted by the first pressing member 95 during the mounting of the developing device 1 on the drum cartridge 2, and the second end portion 62 moves relative to the developing device 1 during the abutment, specifically, the second end portion 62 swings with the swing center of the first insertion hole 65 to be completely abutted by the first pressing member 95. In this embodiment, the cambered surface of the second end portion 62 plays a certain guiding role on the second end portion 62 in the swinging process, so that the second end portion 62 is installed more smoothly, and in other embodiments, the second end portion 62 can be in other shapes.

In addition, at the other end of the drum cartridge 2, there are a third guide surface, a fourth guide surface, a second pressing member and a second spring (not shown) corresponding to the first guide surface 93, the second guide surface 94, the first pressing member 95 and the first spring 96, and the corresponding structure works similarly, and the description thereof is omitted.

As shown in fig. 5, during mounting of the developing device 1 to the drum cartridge 2 or during removal of the developing device 1 from the drum cartridge 2, the developing device 1 is moved relative to the drum cartridge 2 so that the developing roller 20 moves closer to the photosensitive drum 92 or farther from the photosensitive drum 92. The first and second collecting members 60 and 70 pivot about the rotation axis of the developing roller 20, and the guiding action of the first and second guide surfaces 93 and 94 on the first end 61 of the first collecting member 60 and the guiding action of the third and fourth guide surfaces on the second collecting member 70 are such that the first collecting member 60 is placed between or removed from the photosensitive drum 92 and the first pressing member 95 without rotating the cartridge 10 relative to the drum frame 92, and the second collecting member 70 is placed between or removed from the photosensitive drum 92 and the second pressing member.

Fig. 6 is a schematic perspective view showing the relative position of the developing device 1 and the guide member of the drum cartridge after removing the fixing member after the process of installing the developing device in the drum cartridge according to the first embodiment of the present utility model is completed; as shown in fig. 6, when the developing device 1 is mounted to the drum cartridge 2, the first pressing member 95 presses the developing device 1 against the photosensitive drum 92 through the second end 62 of the first collecting member 60 of the Zhang Lijing of the first spring 96. The first end 61 of the first manifold 60 is in contact with the first guide surface 93 and the other portion of the first manifold 60 is in contact with the second guide surface 94 such that the position of the first manifold 60 relative to the drum frame 91 is fixed; likewise, the position of the second manifold 70 relative to the drum frame 91 is also fixed. At this time, the first pressing member 95 presses the first collecting member 60, and the second pressing member presses the second collecting member 70, that is, the developing device 1 receives the urging force exerted by the drum cartridge 2, so that the outer circumferential surface of the developing roller 20 is brought into close contact with the outer circumferential surface of the photosensitive drum 92, ensuring the image forming quality.

When the developing device 1 mounted on the drum cartridge 2 shown in fig. 6 is mounted in an electronic imaging device, the electrodes on the drum cartridge 2 are in contact with the electrode terminals in the electronic imaging device, and since the first spring 96, the first pressing member 95, and the first collecting member 60 are made of conductive materials, the power of the electronic imaging device is supplied to the developing roller shaft 22 via the electrodes, the first spring 96, the first pressing member 95, and the first collecting member 60.

Fig. 7 is a schematic perspective view showing the relative position of the developing device with the guide member of the drum cartridge after the fixing member is removed when the developing device of the first embodiment of the present utility model is in a separation operation; as shown in fig. 7, when it is necessary to temporarily separate the developing roller 20 from the photosensitive drum 92 during printing, the electrophotographic apparatus applies a separating force F to the force receiving portion 111 of the acting member 110, the separating force F presses the force receiving portion 111 of the acting member 110, the acting member 110 pivots about the cam surface 113 from the first position to the second position, the force receiving portion 111 pivots in a direction approaching the third end, and the force applying portion 112 pivots in a direction separating from the third end. At this time, the moving urging portion 112 applies a separating force to the engaging portion 66, so that the first collecting member 60 moves in a direction away from the photosensitive drum 92 under the force, thereby pressing the first pressing member 95, thereby compressing the first spring 96, and the first collecting member 60 moves in a direction away from the photosensitive drum 92 along a track formed between the first guide surface 93 and the second guide surface 94, thereby driving the entire developing device 1 to move in a direction away from the photosensitive drum 92, i.e., the first collecting member 60 receives the separating force and separates the developing roller 20 from the photosensitive drum 92 in this embodiment.

It is understood that, in the present embodiment, the first collecting member 60 may or may not move relative to the developing device 1 after receiving the separating force applied by the electrophotographic apparatus.

When the electronic image forming apparatus starts printing again, the electronic image forming apparatus stops applying the separating force F to the force receiving portion 111 of the acting element 110, and therefore the force applying portion 112 of the acting element 110 no longer abuts the engaging portion 66. At this time, under the action of the self-gravity of the developing device 1, the developing device 1 returns to the original position, so that the developing roller 20 is in contact with the photosensitive drum 92 again, and meanwhile, under the action of the elastic force of the first spring 96, the first pressing member 95 applies a pressing force in the direction approaching the photosensitive drum 92 to the second end 62 of the first collecting member 60, so that the developing roller 20 is in close contact with the photosensitive drum 92.

In this embodiment, the first collecting member 60 may be used for supporting the developing roller 20, or may be only electrically connected to the developing roller 20 without supporting, that is, the developing roller 20 may receive the power supplied from the electronic imaging device through the first collecting member 60, so that the component structure of the developing device 1 is simplified, and therefore, in the manufacturing process, the assembly process is simplified, which is beneficial to improving the production efficiency, thereby reducing the production time and the economic cost and creating greater economic benefits. In addition, in this example, the force application portion 112 of the acting member 110 is matched with the matching portion 66 of the first collecting member 60 by adopting a clamping groove and protruding column structure, and when the acting member receives the separating force F, the matching relationship between the force application portion 112 and the matching portion 66 is more stable during operation, so as to avoid the situation that the developing device 1 fails due to incorrect separation operation during operation.

Example two

As shown in fig. 8, the present embodiment provides a developing device 1, which is different from the first embodiment in the structures of the collecting member and the acting member.

As shown in fig. 8, in the present embodiment, the collecting member includes a first collecting member 60 and a second collecting member 70, the first collecting member 60 is disposed at the first end 11 of the case 10, the second collecting member is disposed at the second end 12 of the case 10, and the first collecting member 60 can be regarded as an electrically conductive electrode.

As shown in fig. 9 and 10, the first collecting member 60 rotatably supports one end portion of the developing roller 20 in the first direction, or is in contact with only one end portion of the developing roller 20 in the first direction but does not function as a support. The first collecting member 60 has a first end 61 and a second end 62, the second end 62 being farther from the developing roller shaft 22 than the first end 61, the second end 62 being farther from the third end of the cartridge 10 than the first end 61 is from the third end of the cartridge 1 in the second direction. The first manifold 60 extends along the first end 11 of the cartridge 10 between a first end 61 and a second end 62. During the mounting of the developing device 1 to the drum cartridge, the first end portion 61 contacts the drum frame 91 and performs a guiding mounting function for the developing device 1, i.e., the first end portion 61 is a guiding portion in this embodiment, guiding the developing device 1 to be mounted smoothly to the drum cartridge. The second end portion 62 can receive the urging force applied by the drum cartridge 2, i.e., the second end portion 62 is an urging portion in this embodiment, so that the developing roller 20 and the photosensitive drum 92 are brought into close contact.

As shown in fig. 11, the first manifold 60 includes a connecting arm 63a, the connecting arm 63a being located between the first end 61 and the second end 62; and the dimension of the connecting arm 63a is smaller than the dimension of the first end portion 61 and/or the second end portion 62, i.e. the dimension of the connecting arm 63a may be smaller than the dimension of the first end portion 61 or the second end portion 62, or may be smaller than both, as viewed in the first direction. Further, the connecting arm 63a is further from the third end of the cartridge 10 than the first end 61 is from the third end of the cartridge 10.

According to the present embodiment, as shown in fig. 11, the first end portion 61 and the second end portion 62 are integrally formed, however, the first end portion 61 and the second end portion 62 may also be separate members. The first collecting member 60 has a first insertion hole 65, the first insertion hole 65 extending in the first direction in the first end 61 of the first collecting member 60, the first insertion hole 65 may be a through hole passing through the first end 61 in the first direction or a blind hole not passing through the first end 60, and an end of the developing roller shaft in the first direction is inserted into the first insertion hole 65 so that the first collecting member 60 is rotatable about the developing roller shaft 22 with respect to the cartridge 10, and more specifically, the second end 62 is pivotable about the rotation axis of the developing roller 20 with respect to the first end 61. The second end 62 of the first collecting member 60 is further provided with a fitting portion 66, the fitting portion 66 is partially located in the connecting arm 63a and located between the first end 61 and the second end 62, the fitting portion 66 is located closer to the second end 62 than the first end 61, and the fitting portion 66 is arc-shaped and protrudes toward the first end 61.

The first collecting member 60 may serve as a conductive member electrically connected to the developing roller shaft 22, and the first collecting member 60 is made of a conductive material such as conductive resin or metal. The first end 61 of the first collecting member 60 is in contact with one end of the developing roller shaft 22 in the first direction, whereby the first end 61 of the first collecting member 60 is electrically connected with the developing roller shaft 22.

As shown in fig. 9 and 10, the acting element 110 is located at the first end 11 of the cartridge body 10. The acting element 110 has a force receiving portion 111, a force applying portion 112, and a cam surface 113. The force receiving portion 111 is located at one end of the acting element 110 in a third direction, which intersects the first direction and the second direction. The urging portion 112 is located at the other end of the acting element 110 in the third direction. The cam surface 113 is located between the force receiving portion 111 and the force applying portion 112 in the third direction. The force receiving portion 111 and the force applying portion 112 may be provided as arc-shaped protrusions having a cylindrical surface having a certain arc shape, and the force applying portion 112 protrudes substantially toward the second end portion 62.

As shown in fig. 14 and 15, the acting element 110 is movable with respect to the case 10. When the developing device 1 is mounted on the drum cartridge 2, the cam surface 113 is in contact with the drum frame 91 of the drum cartridge 2. The acting element 110 is pivotable about the cam surface 113 or close to the cam surface 113 between a first position and a second position. The arcuate cylindrical surface of the force application portion 112 of the acting element 110 is in two positions of contact or non-contact with the mating portion 66 of the first collecting element 60. Wherein, the acting element 110 can be fixed at the first end 11 of the box body 1 through the fixing rod 120; the fixing member 120 may be omitted, and the acting member 110 may be fixed to the first end 11 by a screw at a position near the cam surface 113, preventing the acting member 110 from falling off.

As shown in fig. 8, the second manifold 70 is located at the second end 12 of the cartridge 10. The other structures of the second end 12 are identical to those of the first end 11 and will not be described here.

As shown in fig. 14, in the process of mounting the developing device 1 to the drum cartridge 2, the developing device 1 is moved relative to the drum cartridge 2 so that the developing roller 20 is moved close to the photosensitive drum 92. The first and second aggregation members 60 and 70 pivot about the rotation axis of the developing roller 20. The first collecting member 60 may be placed between the photosensitive drum 92 and the first pressing member 95, i.e., the second end portion 62 may receive the urging force exerted by the first pressing member 95 to move the developing roller 20 in a direction approaching the photosensitive drum 92 so that the developing roller 20 and the photosensitive drum 92 are brought into close contact. At this time, the second end 62 of the first collecting member 60 has not been brought into contact with the first pressing member 95, and the first spring 96 has not been pressed. The second end 61 of the developing device 1 is movable along a track formed between the first guide surface 93 and the second guide surface 94. At this time, the urging portion 112 of the acting element 110 may or may not be in contact with the engaging portion 66.

As shown in fig. 15, when the first collecting member 60 is placed between the photosensitive drum 92 (not shown) and the first pressing member 95, the first pressing member 95 is in contact with the second end portion 62 of the first collecting member 60, and at this time, the first pressing member 95 presses the second end portion 62 of the first collecting member 60 toward the photosensitive drum 92 by the elastic force of the first spring 96, that is, the second end portion 62 receives the urging force applied by the drum cartridge 2 as an urging portion in this embodiment, so that the developing roller 20 is brought into close contact with the photosensitive drum 92. The first end portion 61 of the first collecting member 60 is in contact with the first guide surface 93 and the second guide surface 94 and plays a guiding role during the mounting of the developing device 1, so that the position of the first collecting member 60 with respect to the drum frame 91 is fixed. The force application portion 112 of the acting element 110 may or may not be in contact with the mating portion 66.

When it is necessary to temporarily separate the developing roller 20 from the photosensitive drum 92 during printing, the electrophotographic apparatus applies a separating force F to the force receiving portion 111 of the acting member 110, as in fig. 15 where the separating force F is applied to the force receiving portion 111 of the acting member 110, the separating force F presses the force receiving portion 111 of the acting member 110, and the acting member 110 pivots about the cam surface 113 from the first position to the second position. At this time, the urging portion 112 of the acting member 110 moves in a direction away from the photosensitive drum 92 and presses the engaging portion 66 of the first collecting member 60, at which time the urging portion 112 is in contact with the engaging portion 66 (arcuate projection) and applies a separating force to the engaging portion 66, so that the first collecting member 60 follows the movement of the acting member 110, while the first collecting member 60 causes the first pressing member 95 to move under pressure, so that the first spring 96 is compressed, that is, after the second end portion 62 of the first collecting member 60 is urged by the urging portion 112 of the acting member 110, it can rotate about the rotation axis of the developing roller 20, while the first collecting member 60 moves in a direction away from the photosensitive drum 92 in which the track formed between the first guide surface 93 and the second guide surface 94 moves, thereby driving the developing device 1 to move away from the photosensitive drum 92, that is, in this embodiment, the first collecting member 60 receives the separating force and brings the developing roller 20 out of contact with the photosensitive drum 92. In other embodiments, the second end 62 of the first collecting member 60 is urged by the urging portion 112 of the urging member 110, and the first collecting member 60 does not rotate relative to the developing device 1 but moves together with the developing device 1.

When the reprinting is required, the electronic imaging device cancels the separating force F applied to the force receiving part 111, so that the force application part 112 does not apply the separating force to the matching part 66 any more, the developing device 1 moves towards the direction approaching the photosensitive drum 92 again under the combined action of the self gravity of the developing device 1 and the first spring 96, and the developing roller 20 is in close contact with the photosensitive drum 92.

As can be seen, in the present embodiment, the first pressing member 95 and the first spring 96 are electrically conductive, the drum cartridge 2 further includes an electrode that is in electrical contact with the first spring 96 and with an electrode terminal in the electronic imaging device, and the power of the electronic imaging device is supplied to the developing roller 20 via the drum cartridge 2 electrode, the first spring 96, the first pressing member 95, and the first collecting member 60.

Example III

The present embodiment discloses a developing device, which is different from the first and second embodiments in that: the structure of the collecting piece and the acting piece are different.

As shown in fig. 16, in the present embodiment, the collecting member includes a first collecting member 60 and a second collecting member 70, the first collecting member 60 is disposed at the first end 11 of the case 10, the second collecting member is disposed at the second end 12 of the case 10, and the first collecting member 60 can be regarded as an electrode.

As shown in fig. 16 and 17, the first collecting member 60 includes a first end portion 61, a connecting arm 63a, and a second end portion 62. The first end portion 61, the connection arm 63a, and the second end portion 62 are made of a conductive material such as metal or conductive resin. It is noted that, in the present embodiment, the first end portion 61, the second end portion 62 and the connecting arm 63a are assembled by connecting to form the first assembly 60, wherein the second end portion 62 and the connecting arm 63a may be integrally formed or may be separate.

During the mounting of the developing device 1 to the drum cartridge, the first end portion 61 is in contact with the drum frame 91 and plays a guiding mounting role for the developing device 1 so that the developing device 1 is smoothly mounted to the drum cartridge 2, i.e., the first end portion 61 is a guiding portion guiding the mounting of the developing device 1 in this embodiment. The second end portion 62 receives urging force applied by the drum cartridge 2 as an urging portion so that the developing roller 20 and the photosensitive drum 92 are brought into close contact. The first end portion 61 is provided with a first insertion hole 65 into which the end portion of the developing roller 20 is inserted, and the first end 11 of the cartridge 10 is integrally formed with a positioning shaft 18 extending in the first direction. The first end portion 61 is integrally formed with a groove 611 at an end thereof remote from the developing roller 20 in the second direction. The groove 611 is provided with a second hole 612 into which the positioning shaft 18 is inserted. The first end 61 is held stationary by the end of the developing roller 20 and the positioning shaft 18 and is not rotatable about the rotational axis of the developing roller 20. The design of the first end 61 to remain fixed ensures that the first end 61 does not come into poor contact with the end of the developer roller 20 due to movement. For example, it is possible to avoid contact failure with the end of the developing roller 20 due to an increase in the inner diameter of the first insertion hole 65 after frequent rotation.

As shown in fig. 17, the connecting arm 63a is a pair of plate-shaped members spaced apart in the first direction. One end of the connecting arm 63a extends into the groove 611. The surface of the connecting arm 63a is closely adhered to the inner surface of the groove 611. The other end of the connecting arm 63a is integrally formed with the second end 62.

As shown in fig. 16 and 17, the surface of the second end 62 away from the developing roller 20 is a first stress surface, which is set to be an arc surface in this embodiment, and the first stress surface may be set to be a plane surface to increase the contact area, so as to ensure good current conductivity. The first force receiving surface is for contacting the first pressing piece 95 on the drum cartridge and receiving the urging force exerted by the first pressing piece 95 and receiving the current conducted out via the first spring 96 and the first pressing piece 95. The side of the second end 62 adjacent the developer roller 20 is a second force receiving surface, also referred to as a mating portion 66. In the second direction, the second force bearing surface is located between the first end 61 and the first force bearing surface.

As shown in fig. 16, the first end of the case 10 is provided with a fixing member 120, and the fixing member 120 is provided with an acting member 110. The acting element 110 can oscillate within the fixed element 120. The acting element 110 has a force receiving portion 111 at the third direction end, and a force applying portion 112 at the lower end of the acting element 110. The force receiving portion 111 is for receiving a separating force applied by the electronic imaging device, the force applying portion 112 extends between the plate-shaped members constituting the connecting arm 63a, and the force applying portion 112 is for applying a separating force to the second force receiving surface. The acting member 110 between the force receiving portion 111 and the force applying portion 112 is integrally formed with a cam surface 113, and the cam surface 113 is contactable with the drum cartridge 2 as a fulcrum and supports the acting member 110 to swing. When the force receiving portion 111 receives the separating force applied by the electronic imaging device, the acting member 110 swings around the cam surface 113.

In other embodiments, the first manifold 60 may be linear. In still another embodiment, the structure of the acting element 110 may be the same as that of the first embodiment, and the engaging portion 66 of the first collecting element 60 may be the same as that of the first embodiment.

The following is a procedure of the developing device 1 disclosed in the present embodiment, in which the developing device 1 is first mounted to a drum cartridge in an electronic image forming apparatus. The coupling 41 receives power output from the electronic imaging device and drives the developing roller 20, the powder feeding roller and the stirring frame to rotate through the transmission assembly.

As shown in fig. 16 and 17, when printing is completed, the electronic image forming apparatus no longer outputs power, and thus the developing roller 20, the powder feeding roller, and the agitator stop rotating. At this time, the electrophotographic apparatus applies a separating force F1 to the force receiving portion 111 of the acting member 110, and the force receiving portion 111 of the acting member 110 swings around the cam surface 113 in a direction approaching the developing roller 20 due to the contact of the cam surface 113 with the drum cartridge. At the same time, the urging portion 112 of the urging member 110 swings about the cam surface 113 in a direction away from the developing roller 20, thereby applying the separating force F2 in a direction away from the developing roller 20 to the second urging surface on the second end portion 62. And then the separating force received by the second end 62 is conducted to the first end 61 through the connecting arm 63a, and the first end 61 is conducted to the whole developing device through the positioning shaft 18 and the developing roller 20, so that the whole developing device is driven by the second end 62 to move in a direction away from the photosensitive drum, and further the photosensitive drum is not contacted with the developing roller 20. Meanwhile, since the first spring 96 is installed between the first pressing piece 95 and the frame 91, the first pressing piece 95 is displaced by the separating force F2 and compresses the first spring 96, so that the first pressing piece 95 does not block the movement of the second end portion 62.

When the electronic image forming apparatus starts printing again, the electronic image forming apparatus outputs power to the coupling 41, and the electronic image forming apparatus stops applying the separating force F1 to the force receiving portion 111 of the acting element 110, so the force applying portion 112 of the acting element 110 no longer applies the pushing force F2 to the first pressing member 95. At this time, under the action of the self gravity of the developing device, the developing device returns to the original position, so that the developing roller 20 contacts the photosensitive drum again, and meanwhile, under the action of the elastic force of the first spring 96, the first pressing piece 95 applies a force pushing force close to the direction of the photosensitive drum to the first stress surface on the second end portion 62, so that the first collecting piece 60 drives the developing device, and further, the developing roller 20 contacts the photosensitive drum tightly.

At the same time, the voltage output from the electronic imaging device is conducted to the first spring 96 and then to the second end 62 via the first presser 95. The second end portion 62 conducts electric power to the developing roller 20 through the connecting arm 63a and the first end portion 61. Further, since the first spring 96 is provided, the first pressing member 95 and the second end portion 62 are always kept in contact.

Through the technical scheme, the connection of the developing roller and the voltage supply for the developing roller are realized, so that the functions of the developing roller, such as contact or separation of the developing roller and the photosensitive drum, are integrated on the first collecting piece, the installation matching relation and the number of parts of the developing box are simplified, the production process is simpler when the developing box is produced and manufactured, the production efficiency is higher, the time and economic cost is reduced, and the greater economic benefit is created.

Example IV

The present embodiment provides a developing device 1 different from the first to third embodiments in the structures of the collecting member and the acting member.

As shown in fig. 18, in the present embodiment, the collecting member includes a first collecting member 60 and a second collecting member 70, the first collecting member 60 is disposed at the first end 11 of the case 10, the second collecting member is disposed at the second end 12 of the case 10, and the first collecting member 60 can be regarded as an electrically conductive electrode.

As shown in fig. 20 and 23, the first collecting member 60 is located at the first end 11 of the cartridge body 10, the first collecting member 60 is rotatably mounted to the other end of the developing roller shaft 22 in the first direction, and the first collecting member 60 may support the developing roller shaft 22 or may be in contact with only the developing roller shaft 22 but not supported. The first collecting member 60 has a first end 61, a second end 62, the first collecting member 60 extending in the second direction between the first end 61 and the second end 62, the second end 62 being further from the developing roller 20 than the first end 61, and the second end 62 being further from the third end of the cartridge 10 than the first end 61. During the mounting of the developing device 1 to the drum cartridge, the first end portion 61 is in contact with the drum frame 91 and plays a guiding mounting role for the developing device 1 so that the developing device 1 is smoothly mounted to the drum cartridge, i.e., in the present embodiment, the first end portion 61 can be regarded as a guiding portion. The second end portion 62 may receive the urging force applied by the drum cartridge 2 as an urging portion so that the developing roller 20 and the photosensitive drum 92 are brought into close contact.

The first manifold 60 further includes a first arm 63 and a second arm 64, the second arm 64 being further from the developer roller 20 than the first arm, and the second arm 64 being further from the third end of the cartridge 10 than the first arm 62; in the present embodiment, the first end portion 61 is integrally formed with the second end portion 62. However, the first end portion 61 and the second end portion 62 may be a separate structure, and in this case, the first end portion 61 and the second end portion 62 may be fixed and connected to each other.

The first manifold 60 further includes a first insertion hole 65, the first insertion hole 65 extending in a first direction in the first end 61 of the first manifold 60. The first insertion hole 65 may be a through hole passing through the first end portion 61 in the first direction, and the first insertion hole 65 may also be a blind hole not passing through the first end portion 61, and an end portion of the developing roller shaft 22 in the first direction is inserted into the first insertion hole 65. The first collecting member 60 is rotatable about the developing roller shaft 22 with respect to the cartridge body 10. More specifically, the second end 62 is pivotable relative to the first end 61 about the rotational axis of the developer roller 20.

The first collecting member 60 serves as a conductive member, and is electrically connected to the developing roller 20, and thus may also be referred to as a developing electrode. The first collecting member 60 may be made of a conductive material such as a conductive resin, a metal, or the like, without being particularly limited thereto.

The first collecting member 60 further has a mating portion 66, the mating portion 66 is disposed on the second arm 64, and in this embodiment, the mating portion 66 is a first hole 66. The first hole 66 is located between the first end 61 and the second end 62 in the second direction, the first hole 66 may not necessarily extend completely through the first collecting member 60, and an upper end of the first hole 66 may extend through the first collecting member 60 or a lower end of the first hole 66 may extend through the first collecting member 60 in the third direction. In the present embodiment, the structure of the first hole 66 is approximately rectangular, and alternatively, the shape of the first hole 66 may be a regular polygon structure or an irregular structure, which is not particularly limited.

As shown in fig. 20, the acting element 110 is disposed at the first end 11 of the box 10, and the acting element includes a first translational element 130 and a second translational element 140, where the first translational element 130 and the second translational element 140 are movable relative to the box 10. The first end 11 of the box 10 further has a first sliding rail 15 and a second sliding rail 16. In the present embodiment, the first slide rail 15 extends in the second direction, and alternatively, the first slide rail 15 may be disposed in a direction not parallel to the second direction. The second slide rail 16 forms an angle with the first slide rail 15. In the present embodiment, the angle formed by the first slide rail 15 and the second slide rail 16 is an acute angle. The first translation member 130 is installed at the position of the first sliding rail 15, the second translation member 140 is installed at the position of the second sliding rail 16, the first translation member 130 is movable relative to the first sliding rail 15, the second translation member 140 is movable relative to the second sliding rail 16, that is, the first translation member 130 and the second translation member 140 are movable relative to the box body 10, and the movement mode is linear movement. Alternatively, the movement mode may be a curved movement. In other embodiments, the first sliding rail 15 and the second sliding rail 16 may be configured as a communicated U-shaped or V-shaped sliding rail, and a translational member is installed in the sliding rail, and the translational member moves along the sliding rail when stressed, and may move in a curved or linear manner.

As shown in fig. 21, the first translation member 130 is a block member, the first translation member 130 includes a third force bearing surface 131, a third force application surface 132, and a first mounting portion 133, and the third force bearing surface 131 and the third force application surface 132 are respectively located at two ends of the first translation member 130 in the second direction; as shown in fig. 22, the second translation member 140 is a rod-shaped member, and the second translation member 140 includes a fourth force receiving surface 141, a force applying portion 112, and a second mounting portion 143, and the fourth force receiving surface 141 and the force applying portion 112 are respectively located at both ends of the second translation member 140 in the third direction. In this embodiment, the third force application surface 132 and the four force receiving surfaces 141 are inclined surfaces or arc surfaces, and the force is transferred by the contact between the inclined surfaces and the inclined surfaces, the contact between the inclined surfaces and the arc surfaces, or the contact between the arc surfaces and the arc surfaces. In the present embodiment, the first translation member 130 is a force receiving portion of the acting member of the third force receiving surface 131 that receives the external force, and the second translation member 140 is a force applying portion 112 of the acting member that transmits the external force to the first collecting member 60. In the present embodiment, the first mounting portion 133 is disposed on the surface of the first translation member 130 facing the box body 10, the second mounting portion 143 is disposed on the surface of the second translation member 140 facing the box body 10, the first mounting portion 133 and the second mounting portion 143 are both T-shaped, and the corresponding mounting positions of the first slide rail 15 and the second slide rail 16 are inverted T-shaped, so that the first slide rail 15 allows the first translation member 130 to move relative to the box body 10, and prevents the first translation member 130 from falling off from the first slide rail 15; likewise, the second slide rail 16 allows the second translation member 140 to be movable along the second slide rail 16 relative to the case 10, and prevents the second translation member 140 from falling off the second slide rail 16. Alternatively, the first mounting portion 133 and the second mounting portion 143 may be configured in other shapes, for example, rectangular, where the first sliding rail 15 and the second sliding rail 16 are configured in corresponding shapes, and in order to prevent the first translation member 130 and the first translation member 110 from falling off from the case 10, a fixing member may be further disposed at a position farther from the case 10 than the first translation member and the second translation member.

As shown in fig. 21 to 23, the third stress surface 131 is configured to receive a separating force from the electronic imaging device, so that the first translation member 130 moves along the extending direction of the first sliding rail 15; in the third direction, the first translation member 130 is at least partially located above the second translation member 140, so that the third force application surface 132 contacts the fourth force application surface 141, and when the first translation member 130 is forced to move, the fourth force application surface 141 receives the separating force from the first force application surface 143, so that the second translation member 140 moves along the extending direction of the second sliding rail 16. The force application portion 112 is disposed in the first hole 66, and the force application portion 112 abuts against an inner surface 662 (shown in fig. 24) of the first hole 66, so that the second translation member 140 drives the first collecting member 60 to perform a swinging motion or a linear motion during the movement, thereby moving the developing device 1.

The second manifold 70 is located at the second end 12 of the cartridge 10, and the first manifold 60 and the second manifold 70 are positioned to overlap one another as viewed in the first direction. The second assembly rotatably supports the other end of the developing roller shaft 22. The other structures of the second end 12 are similar to those of the first end 11, and the description thereof will be omitted. In other embodiments, the first manifold 60 and the second manifold may not be positioned to overlap each other as seen in the first direction, or only one manifold may be provided.

As shown in fig. 23, during mounting of the developing device 1 to the drum cartridge 2 and during removal of the developing device 1 from the drum cartridge 2, the developing device 1 is moved relative to the drum cartridge 2 so that the developing roller 20 is moved closer to the photosensitive drum 92 or farther from the photosensitive drum 92. The guiding action of the first guide surface 93, the second guide surface 94 on the first end portion 61 and the guiding action of the third guide surface, the fourth guide surface on the second collecting member 70 place the first collecting member 60 between the photosensitive drum 92 and the first pressing member 95 or remove from between them, and the second collecting member 70 is placed between the photosensitive drum 92 and the second pressing member or remove from between them.

As shown in fig. 24, when the developing device 1 is mounted to the drum cartridge 2, the first pressing member 95 presses the developing device 1 against the photosensitive drum 92 by the second end 62 of the first collecting member 60 of the first spring 96 Zhang Lijing, that is, the second end 62 is a pressing portion for receiving the pressing force applied by the drum cartridge 2 in this embodiment, so that the developing roller 20 is brought into close contact with the photosensitive drum 92. The first end portion 61 of the first collecting member 60 contacts with the first guide surface 93 and plays a role in guiding the installation of the developing device 1, and the other portion of the first collecting member 60 contacts with the second guide surface 94. Thus, the position of the first collecting member 60 with respect to the drum frame 91 is fixed; likewise, the position of the second manifold 70 relative to the drum frame 91 is also fixed. At this time, the first pressing member 95 presses the first collecting member 60, and the second pressing member presses the second collecting member 70, and the outer circumferential surface of the developing roller 20 contacts the outer circumferential surface of the photosensitive drum 92. The force application portion 112 of the second translation member 140 is engaged with the inner surface 662 of the first hole 66, specifically, in this embodiment, the force application portion 112 and the inner surface 662 face each other in the second direction, and optionally, the size of the force application portion 112 may be enlarged, so that the force application portion 112 is engaged with the inner surface 662 in both the second direction and the third direction, so that the force transmission process is more stable during operation.

When the developing device 1 mounted on the drum cartridge 2 shown in fig. 24 is mounted in an electronic imaging device, the electrodes on the drum cartridge 2 are in contact with the electrode terminals in the electronic imaging device, and since the first spring 96, the first pressing member 95, and the first collecting member 60 are made of conductive materials, the power of the electronic imaging device is supplied to the developing roller shaft 22 via the electrodes, the first spring 96, the first pressing member 95, and the first collecting member 60.

As shown in fig. 25, when the developing roller 20 and the photosensitive drum 92 need to be temporarily separated during printing, the electronic imaging device applies a separating force F to the third force-bearing surface 131, so that the first translation member 130 moves in a translational manner, and at this time, the third force-bearing surface 132 applies a separating force to the fourth force-bearing surface 141, so that the second translation member 140 moves in a translational manner along another direction at an angle to the first translation member 130, and further, the force-applying portion 112 applies a separating force to the inner surface 662 of the first hole 66, and the first collecting member 60 moves in a direction away from the photosensitive drum 92 under the force. The first pressing member 95 is thereby pressed, and the first spring 96 is compressed, and the first collecting member 60 moves in a direction in which the track formed between the first guide surface 93 and the second guide surface 94 is away from the photosensitive drum 92, and thereby drives the cartridge 10 to move together, so that the developing device 1 and the drum cartridge 2 are spaced in the second direction, specifically, so that the developing roller 20 and the photosensitive drum 92 are not contacted, with a space therebetween.

In the present embodiment, the movement tracks of the first translation member 130 and the second translation member 140 are both guided and defined by the first sliding rail 15 and the second sliding rail 16, so that the force transmission between the components of the developing device 1 is more stable during the working process.

Example five

As shown in fig. 26, the present embodiment provides a developing device 1 which is different from the first to fourth embodiments in the structure of the collecting member and further includes a developing electrode.

In the present embodiment, the first collecting member is not used for transmitting the bias voltage to the developing roller shaft 22, and thus, the first collecting member may not be made of a conductive material, and includes the first collecting member 60 and the second collecting member 70 provided at the first end 11 and the second end 12 of the cartridge body 10, respectively. During the mounting of the developing device 1 to the drum cartridge, the first end portion 61 is in contact with the drum frame 91 and plays a guiding mounting role for the developing device 1 so that the developing device 1 is smoothly mounted to the drum cartridge, i.e., the first end portion 61 is a guiding portion in this embodiment.

As shown in fig. 26, the first manifold 60 is located at the first end 11 of the cartridge 10. The first collecting member 60 rotatably supports one end portion of the developing roller 20 in the first direction, or does not rotate as a collecting member of the developing roller 20 supported at the first end 11 of the developing roller 20 in the first direction of the cartridge 10, or is in contact with only the developing roller 20 without being supported. Further, the first manifold 60 has a first end 61 and a second end 62. The second end 62 is farther from the developing roller shaft 22 than the first end 61. Further, the second end 62 is further from the third end of the cartridge 10 in the second direction than the first end 61 is from the third end of the cartridge 10 in the second direction. The first manifold 60 extends along the first end 11 of the cartridge 10 between a first end 61 and a second end 62. The first manifold 60 includes a connecting arm 63a, the connecting arm 63a being located between the first end 61 and the second end 62; and the dimension of the connecting arm 63a is smaller than the dimension of the first end 61 and/or the second end 62, as compared to the dimension viewed in the first direction. Further, the connecting arm 63a is farther from one end of the case 10 in the second direction than the first end 61 is from one end in the second direction. The first insertion hole 65 of the first manifold 60 is fitted over the developing roller shaft 22. The second end 62 is an arc-shaped hook (in this embodiment, the second end 62 is also a mating portion). The first insertion hole 65 extends in the first direction in the first end 61 of the first manifold 60. The first insertion hole 65 may be a through hole penetrating the first end portion 61 in the first direction, or may be a blind hole not penetrating the first end portion 61, and an end portion of the developing roller shaft in the first direction is inserted into the first insertion hole 65. As shown in fig. 26, a pushing portion 67 and a positioning member 68 are further provided on the first end 11 of the casing 10 in the first direction, and both the pushing portion 67 and the positioning member 68 protrude in the first direction away from the first end 11 of the casing 10, the pushing portion 67 being a block member for receiving the pushing force applied by the drum cartridge 2, and the pushing portion 67 being located on the side of the casing 10 away from the developing roller 20 in the second direction. The positioning member 68 is a block member, and in the second direction, the positioning member 68 is closer to the third end of the case 10 than the urging portion 67. In the second direction, the second end 62 is located between the urging portion 67 and the first end 61.

As shown in fig. 26, the developing electrode 80 is a strip-shaped member, and includes a first developing electrode end 81 and a second developing electrode end 82, the developing electrode 80 extends along the second direction, the first developing electrode end 81 is an end of the developing electrode 80 near the third end of the cartridge body 10, and the second developing electrode end 82 is farther from the third end of the cartridge body 10 than the first developing electrode end 81. The first end 81 of the developing electrode is electrically connected with the developing roller shaft 22, specifically, a third hole can be formed in the first end 81 of the developing electrode, the developing roller shaft 22 is sleeved with the third hole, the second end 82 of the developing electrode can be sleeved with the pushing portion 67 and detachably connected with the pushing portion 67, specifically, a fourth hole can be formed in the second end 82 of the developing electrode, and the pushing portion 67 is sleeved with the fourth hole. Or the developing electrode 80 and the pushing part are made of conductive materials into a whole, and the developing electrode 80 and the pushing part are fixed on the box body 10 together. The developing electrode 80 is closer to the first end 11 of the cartridge 10 than the first collecting member 60, i.e., the developing electrode 80 is located inside the first collecting member 60.

As shown in fig. 26, the acting element 110 is located at the first end 11 of the cartridge 10. The acting element 110 has a force receiving portion 111, a force applying portion 112, and a cam surface 113. The force receiving portion 111 is located at one end of the acting element 110 in the third direction, and the force applying portion 112 is located at the other end of the acting element 110 in the third direction. The cam surface 113 is located between the force receiving portion 111 and the force applying portion 112 in the third direction. The force receiving portion 111 and the force applying portion 112 may be provided as cylindrical surfaces having a certain arc shape.

As shown in fig. 28 to 31, the acting element 110 is movable with respect to the case 10. The acting element 110 may be fixed to the first end 11 of the case 1 by a fixing element 120; as shown in fig. 27, the anchor 120 may be omitted and the acting member 110 may be secured to the first end 11 by a screw a120 at a location adjacent the cam surface 113. Preventing the reaction member 110 from falling off from one side in the third direction also makes the reaction member 110 movable with respect to the case 10.

The cam surface 113 is in contact with the drum frame 91 (shown in fig. 28) of the drum cartridge 2. The acting element 110 is pivotable about the cam surface 113 or a point near the cam surface 113 between a first position and a second position. The arcuate cylindrical surface of the urging portion 112 of the urging member 110 is in two positions of being operative or inoperative with the arcuate hooks (the second end portions 62) of the first collecting member 60.

When the developing device 1 is mounted on the drum cartridge 2, the first pressing member 95 presses the urging portion 67 toward the photosensitive drum 92 by the elastic force of the first spring 96. Further, the drum cartridge 2 includes a second pressing member (not shown) and a second spring (not shown).

Specific action description of mounting, fixing and dismounting the developing device and the drum box:

as shown in fig. 29, when the developing device 1 is mounted to the drum cartridge 2, not yet completely in position, the developing device 1 is moved relative to the drum cartridge 2 so that the developing roller 20 is moved close to the photosensitive drum 92. The first and second aggregation members 60 and 70 pivot or do not rotate about the rotational axis of the developing roller 20. The first collection member 60 is between the photosensitive drum 92 and the first pressing member 95, and the electrophotographic apparatus can move the developing roller 20 close to the photosensitive drum 92. At this time, the urging portion 67 has not yet completely abutted against the first pressing piece 95, and the first spring 96 is in a state of not yet being deformed by pressing. The first end 61 of the first collecting member 60 may move along the track formed between the first guide surface 93 and the second guide surface 94, and the force applying portion 112 of the acting member 110 may be out of contact with the second end 62 (arc-shaped hook portion) of the first collecting member 60. At this time, the positioning member 68 has not yet contacted the second guide surface 94 of the drum cartridge 2. The acting element 110 does not receive an external force.

As shown in fig. 30, when the developing device 1 is further put into the drum cartridge 2, the first collecting member 60 is placed between the photosensitive drum 92 and the first pressing member 95, the first pressing member 95 is in contact with the urging portion 67, and the first spring 96 is in a pressed state, and applies urging force to the urging portion 67, bringing the developing roller 20 of the developing device 1 into contact with the photosensitive drum 92. At this time, the first pressing member 95 presses the pressing portion 67 toward the photosensitive drum 92 by the elastic force of the first spring 96. The first end 61 of the first collection member 60 then contacts the first guide surface 93 and another portion of the first collection member 60 contacts the second guide surface 94. While the positioning member 68 contacts the second guide surface 94 of the drum cartridge 2. In this way, the position of the developing device 1 with respect to the drum frame 91 is fixed. Thereby realizing the cooperation of the developing device 1 and the drum cartridge 2, thereby realizing the normal printing operation.

When it is necessary to temporarily separate the developing roller 20 from the photosensitive drum 92 during printing, the electrophotographic apparatus applies a separating force to the force receiving portion 111 of the acting member 110, as in fig. 31, a separating force F is applied to the force receiving portion 111 of the acting member 110, the separating force F pressing the force receiving portion 111 of the acting member 110, and the acting member 110 pivots about the cam surface 113 from the first position to the second position. At this time, the urging portion 112 of the acting member 110 moves in a direction away from the photosensitive drum 92, and presses the second end portion 62 (arc-shaped hook portion) of the first collecting member 60, at which time the urging portion 112 is in contact with the arc-shaped hook portion. Thereby stressing the first collecting member 60, the first collecting member 60 drives the developing device 1 to move in a direction away from the photosensitive drum 92 along a track formed between the first guide surface 93 and the second guide surface 94. At the same time, after the second end 62 of the first collecting member 60 receives the force of the force applying portion 112 of the acting member 110, it can rotate around the rotation axis of the developing roller 20, or the force applying portion 112 and the arc-shaped hook portion rotate, or the first collecting member 60 makes a linear motion, so that the pushing portion 67 is separated from the first pressing member 95, at this time, the first spring 96 is pressed, and the developing roller 20 is gradually separated from the contact photosensitive drum 92. With the above arrangement, the developing electrode for supplying the bias voltage to the developing roller does not move relative to the cartridge, the occurrence of the power failure due to the movement of the developing electrode is avoided, and the developing roller 20 is brought out of contact with the photosensitive drum 92 in a stable manner.

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 (16)

1. A developing device detachably mountable to an electrophotographic apparatus including a drum cartridge, said drum cartridge including a drum frame and a photosensitive drum, said developing device comprising:

a cartridge accommodating a developer therein, the cartridge having a first end and a second end in a first direction and a third end and a fourth end in a second direction;

a developing roller rotatably supported at a third end of the cartridge body, the developing roller including a developing roller shaft extending in a first direction;

the acting piece is movably arranged on the box body and comprises a stress part and a force application part, the stress part can receive the separation force applied by the electronic imaging device, the force application part is used for transmitting the separation force,

a guide portion in contact with the drum frame for guiding the mounting of the developing device,

a pushing part for pushing the developing roller closely to the photosensitive drum by the pushing force exerted by the drum receiving box,

And the matching part is used for receiving the separation force transmitted by the force application part, and is positioned between the guide part and the forced pushing part in the second direction.

2. A developing device according to claim 1, wherein said fitting portion is an arc-shaped projection; or the matching part is a convex column; alternatively, the matching part is a blind hole or a groove; alternatively, the mating portion is an arcuate hook portion.

3. The developing device according to claim 2, wherein the urging portion is a card slot, or; the force application part is an arc-shaped bulge; alternatively, the force application part is an arc-shaped hook part.

4. A developing device according to claim 3, wherein the boss extends outwardly in the first direction, the engaging groove is a U-shaped groove, and the engaging groove is engaged with the boss.

5. A developing device according to claim 3, wherein said engaging portion engages with said urging portion in a hooking manner.

6. A developing device according to claim 1, wherein said acting member includes at least one translational member that moves linearly with respect to said cartridge body.

7. A developing device according to claim 6, wherein said acting member includes a first translational member including a force receiving portion, and a second translational member including a force applying portion, the second translational member being moved by the first translational member when moved by receiving an external force.

8. A developing device according to claim 7, wherein said first translation member and said second translation member are provided with inclined surfaces or cambered surfaces, and said first translation member and said second translation member are driven by said first translation member through contact between the inclined surfaces or between the inclined surfaces and the cambered surfaces or between the cambered surfaces.

9. A developing device according to claim 7, wherein an angle is formed between a moving direction of the first translation member and a moving direction of the second translation member.

10. The developing device according to claim 9, wherein the included angle is an acute angle.

11. The developing device according to claim 7, wherein a first slide rail is provided on the cartridge body, a first mounting portion is provided on the first translation member, and the first translation member is mounted on the first slide rail by the first mounting portion and is movable relative to the first slide rail;

The box body is provided with a second sliding rail, the second translation part is provided with a second installation part, and the second translation part is installed on the second sliding rail through the second installation part and can move relative to the second sliding rail.

12. The developing device according to claim 1, further comprising a first collecting member on which the guide portion, the urging portion, and the engaging portion are located, the first collecting member being moved in response to the separating force applied by the acting member, the first collecting member moving to move the developing device in a direction away from the photosensitive drum to separate the developing roller from the photosensitive drum.

13. The developing device according to claim 12, wherein the first collecting member is connected to the developing roller, the first collecting member is made of a conductive material, and the first collecting member receives the power transmitted from the electrophotographic image forming apparatus and transmits the power to the developing roller.

14. A developing device according to claim 1, wherein said urging portion is located at a first end of said cartridge body and extends outwardly in a first direction, and in a second direction, said urging portion is further away from the developing roller than said fitting portion.

15. The developing device according to claim 1, further comprising a positioning shaft and a first collecting member, said first collecting member being connected to said developing roller, said fitting portion being located on said collecting member, said first collecting member being moved by receiving a separating force applied by said acting member, said first collecting member moving said developing device in a direction away from said photosensitive drum to separate said developing roller from said photosensitive drum, said positioning shaft protruding outward in a first direction, said collecting member being provided with a second hole and a first insertion hole to which a developing roller shaft is connected, said second hole being located farther from said photosensitive drum than said first insertion hole in a second direction, said positioning shaft being inserted into said second hole, the first collecting member being swingable around the positioning shaft.

16. The developing device according to claim 1, further comprising a first collecting member, said fitting portion being located at said first collecting member, said first collecting member being movable relative to the developing device upon receiving the separating force applied by said acting member.