CN218782516U

CN218782516U - Developing box

Info

Publication number: CN218782516U
Application number: CN202223356431.0U
Authority: CN
Inventors: 彭航宇
Original assignee: Zhuhai Dinghe Technology Co ltd
Current assignee: Zhuhai Dinghe Technology Co ltd
Priority date: 2022-12-12
Filing date: 2022-12-12
Publication date: 2023-03-31
Anticipated expiration: 2032-12-12

Abstract

The utility model relates to a detachably install the developing cartridge in the imaging device who is provided with the application of force part, this developing cartridge includes the casing that holds the developer and sets up the developer roll in the casing rotatably, the developer roll is used for carrying the developer towards the sensitization drum surface rather than arranging relatively, the developing cartridge still includes the basal portion that sets up at casing longitudinal end and the elastic component of being connected with the basal portion, the basal portion is used for transmitting the effort that the application of force part applyed to the casing, makes developer roll and sensitization drum be close to each other or mutual separation; the elastic member is further away from the developing roller than the base portion in a direction along a line connecting the center of the base portion and the center of the developing roller, and therefore, the manufacturing accuracy of the developing cartridge/casing can be reduced, and the elastic member can be mounted more smoothly with a wider range of choices of materials and volumes.

Description

Developing box

Technical Field

The utility model relates to an electrophotographic image forming field especially relates to a detachably installs the development box in electrophotographic image forming apparatus.

Background

Chinese patent CN214225685 discloses a cartridge provided with a movable member 37, wherein the movable member 37 protrudes from a housing of the cartridge for receiving an acting force applied from a force application member of an image forming apparatus, thereby achieving contact and separation between a developing roller located in the cartridge and a photosensitive drum outside the cartridge.

In order to adjust the contact pressure between the developing roller and the photosensitive drum, an elastic component is usually arranged between the moving part and the developing roller, so that the contact pressure between the developing roller and the photosensitive drum is kept in a preset range, and correspondingly, an accommodating part for accommodating the elastic component is also required to be arranged on the shell, so that the requirement on the manufacturing precision of the shell is higher, the requirement on the volume and the material of the elastic component is provided, and otherwise, the problem of non-adaption or damage can occur; meanwhile, the elastic member also needs to be precisely mounted to the receiving portion, and thus, the mounting of the elastic member is not facilitated in the conventional structure.

SUMMERY OF THE UTILITY MODEL

Therefore, the utility model provides an adopt following technical scheme's development box to reduce the manufacturing accuracy requirement of development box, enlarge the optional scope of the material and the volume of elastic component, and be convenient for the elastic component installation, the concrete scheme is as follows:

a developing cartridge detachably mountable to an image forming apparatus provided with a force application member, the developing cartridge including a housing accommodating a developer and a developing roller rotatably provided in the housing for conveying the developer toward a surface of the photosensitive drum disposed opposite thereto, the developing cartridge further including a base portion provided at a longitudinal end of the housing for transmitting a force applied by the force application member to the housing so that the developing roller and the photosensitive drum approach or separate from each other, and an elastic member connected to the base portion; the elastic member is located farther from the developing roller than the base portion in a direction along a line connecting the center of the base portion and the center of the developing roller, and therefore, the manufacturing accuracy of the developing cartridge/casing can be reduced, and the elastic member can be mounted more smoothly with a wider range of choices of materials and volumes.

In some embodiments, the elastic member is farther from the developing roller than the base in the moving direction of the force application member.

In some embodiments, the developing cartridge further comprises a cover assembly at a longitudinal end of the casing, the base being connected to the cover assembly or the casing.

Wherein the base is fixedly connected with the cover assembly or the shell; the base may also be movably connected to the cover assembly or the housing.

When the base is disposed to rotate relative to the cap assembly or the casing, the rotational axis of the base is parallel to the longitudinal direction of the developing cartridge; when the base is provided to slide relative to the cover assembly or the housing, the sliding direction of the base coincides with the moving direction of the force application member.

The developing cartridge further includes a restricting member provided on the cover assembly or the casing for preventing the base portion from coming off and/or transmitting the urging force applied by the urging member to the casing when the base portion is disposed to rotate relative to the cover assembly or the casing.

In some embodiments, the developing cartridge further comprises a pressing member abutting the elastic member, the pressing member receiving the urging force applied by the urging member.

In some embodiments, the resilient member is a cantilever connected to the base.

Drawings

Fig. 1A and 1B are perspective views of a developing cartridge according to an embodiment of the present invention.

Fig. 2A is a state diagram of the developing cartridge according to the first embodiment of the present invention after the driving end cover and the housing are separated.

Fig. 2B is a state diagram of the developing cartridge according to the first embodiment of the present invention after the non-driving end cap and the casing are separated.

Fig. 3 is a side view of a non-driving end cap according to an embodiment of the present invention, as viewed in a longitudinal direction.

Fig. 4 is a perspective view of a non-drive end cover according to a second embodiment of the present invention.

Fig. 5 is a side view of a non-driving end cap according to a second embodiment of the present invention, viewed in a longitudinal direction.

Fig. 6 is a state diagram in which a part of the driving end and a part of the non-driving end of the developing cartridge according to the third embodiment of the present invention are separated from the housing at the same time.

Detailed Description

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[ example one ]

A developing cartridge 10 detachably mountable to an image forming apparatus provided with a driving force output member and a force application member 9, the developing cartridge 10 including a casing 1 accommodating a developer, a developing roller 2 rotatably provided in the casing 1, and a driving force receiving member 3 for receiving a driving force; the direction in which the developing roller 2 extends is referred to as a longitudinal direction/x direction of the developing cartridge, the driving force receiving member 3 is provided at one longitudinal end of the housing 1, the one longitudinal end at which the driving force receiving member 3 is provided is referred to as a driving end F, the opposite one longitudinal end is referred to as a non-driving end E, a direction directed from the non-driving end E to the driving end F is + x direction, and a direction directed from the driving end F to the non-driving end E is-x direction.

The driving force receiver 3 may be disposed such that the rotational axis of the driving force receiver 3 is coaxial with the rotational axis L of the developing roller 2, or the rotational axis of the driving force receiver 3 and the rotational axis L of the developing roller 2 are parallel to each other, and regardless of the disposition of the driving force receiver 3, the driving force receiver 3 can be coupled with the driving force output member and receive the driving force of the driving force output member to drive the developing roller 2 to rotate when the developing cartridge 10 is mounted to the image forming apparatus.

Further, the developing cartridge 10 further includes a first cover member 5 and a second cover member 6 at both longitudinal ends of the casing 1, wherein the first cover member 5 is disposed at the driving end F, the second cover member 6 is disposed at the non-driving end E, and the driving force receiver 3 is exposed outward from the first cover member 5.

The first cover assembly 5 may be configured to be formed by combining a plurality of end covers, or may be configured to be only one end cover, and similarly, the second cover assembly 6 may be configured to be formed by combining a plurality of end covers, or may be configured to be only one end cover, and according to design requirements, the first cover assembly 5 is described below as including the driving-end inner cover 51 and the driving-end outer cover 52, and the second cover assembly 6 is described as being only one end cover, so that the second cover assembly 6 may also be referred to as a non-driving end cover.

Further, the developing cartridge 10 further includes a force receiving mechanism 7, the developing roller 2 is disposed opposite to the photosensitive drum 8 described below in a state where the developing cartridge 10 is mounted to the image forming apparatus, and the force receiving mechanism 7 can receive a force applied from the force applying member 9 in the image forming apparatus so that the developing roller 2 and the photosensitive drum 8 are close to or away from each other.

Fig. 2A is a state diagram of the developing cartridge according to the first embodiment of the present invention after the driving end outer cover and the housing are separated; fig. 2B is a state diagram of the developing cartridge according to the first embodiment of the present invention after the non-driving end cap and the casing are separated; fig. 3 is a side view of a non-driving end cap according to an embodiment of the present invention, as viewed in a longitudinal direction.

As shown in fig. 2A, the developing cartridge 10 further includes a driving force transmission assembly 31 coupled to the driving force receiving member 3, the driving force transmission assembly 31 for transmitting the driving force of the driving force receiving member 3 to the developing roller or other rotatable member in the developing cartridge; the driving end inner cover 51 is fixedly mounted on the housing 1, at least a part of the driving force transmission assembly 31 is arranged on the driving end inner cover 51, and the driving end outer cover 52 is connected with the housing 1 or the driving end inner cover 52, so that at least a part of the driving force transmission assembly 31 is positioned between the driving end inner cover 51 and the driving end outer cover 52 to be protected, and parts between the driving end inner cover 51 and the driving end outer cover 52 can be prevented from falling off, thereby preventing the parts from being damaged.

In some embodiments, the force receiving mechanism 7 includes a first force receiving member 7A at the driving end and a second force receiving member 7B at the non-driving end, and the first force receiving member 7A and the second force receiving member 7B can simultaneously receive the force applied by the force applying member, so that both longitudinal ends of the developing cartridge 10 can be simultaneously applied and the movement process of the developing cartridge 10 can be stabilized.

In other embodiments, only one of the first acting force receiving assembly 7A and the second acting force receiving assembly 7B is provided, after the acting force receiving assembly receives the acting force applied by the force application component 9, the developing roller 2 and the photosensitive drum 8 are close to or away from each other on the side where the acting force receiving assembly is provided, and the developing roller 2 and the photosensitive drum 8 are also driven to be close to or away from each other on the side where the driving force receiving assembly is not provided.

As shown in fig. 2A, the first acting force receiving assembly 7A includes a base portion 7A1, an elastic member 7A2 and a pressing member 7A3, wherein the base portion 7A1 can be connected with the housing 1 or the first cover assembly 5, and in the present embodiment, the base portion 7A1 is preferably fixedly connected with the housing 1 or the first cover assembly 5, and more preferably, the base portion 7A1 is integrally formed with the housing 1 or the first cover assembly 5, so that when the base portion 7A1 is connected with the first cover assembly 5, the base portion 7A1 can be connected with both the driving end inner cover 51 and the driving end outer cover 52; the elastic piece 7A2 is positioned between the base part 7A1 and the pressing piece 7A3, and the elastic piece 7A2 is provided as a compression spring with one end abutting against the base part 7A1 and the other end abutting against the pressing piece 7A 3; furthermore, the base part 7A1 can be further provided with a positioning column 7A4, and the elastic piece 7A2 is abutted and positioned with the base part 7A1 through the positioning column 7A4, so that the elastic piece 7A2 can be deformed along a predetermined path, and the elastic piece 7A2 is prevented from deviating in direction or slipping during elastic deformation, so as to enhance the positioning accuracy of the elastic piece.

In some embodiments, the pressing member 7A3 may not be provided, and at this time, the urging member 9 will directly abut against the elastic member 7A2, and at this time, the elastic member 7A2 also functions to directly receive the force exerted by the urging member 9, and when the force is applied to the elastic member 7A2, the elastic member 7A2 transmits the force to the base portion 7A1.

The second force receiving assembly 7B has substantially the same structure as the first force receiving member 7A, and as shown in fig. 2B, the second force receiving assembly 7B includes a base portion 7B1, an elastic member 7B2 and a pressing member 7B3, the base portion 7B1 may be configured to be fixedly connected with the housing 1, or may be configured to be fixedly connected with the non-driving cap 6, and preferably, the base portion 7B1 is formed integrally with the housing 1 or the non-driving cap 6; likewise, the second force receiving assembly 7B also includes a positioning post 7B4 provided on the base portion 7B1 to position the elastic member 7B 2.

As shown in fig. 3, the urging member 9 provided in the image forming apparatus is movable in the y direction intersecting the x direction, and at least a part of the urging force receiving mechanism 7 reaches the movement path of the urging member 9 in the y direction after the developing cartridge 10 is mounted to the image forming apparatus, and the developing roller 2 is opposed to the photosensitive drum 8 outside the developing cartridge 10, but is not in contact with but in a state of being away from each other. As shown in fig. 3, a center of the base portion 7B1 and a center connecting line AB of the developing roller 2 are located in a z direction intersecting both the x direction and the y direction.

In the case where the pressing member 7B1 is provided in the second force receiving unit 7B, when the urging member 9 moves in the + y direction, the urging member 9 abuts against the pressing members 7A3/7B3, and the urging force of the urging member 9 urges the elastic members 7A2/7B2 to be elastically deformed by the pressing members 7A3/7B3, thereby pushing the base 7A1/7B1 and the casing 1 to move, and the developing roller 2 and the photosensitive drum 8 approach each other and are held in the state of approaching each other by the urging force of the urging member 9. It follows that the urging force exerted by the urging member 9 is not entirely directly applied to the casing 1 by the elastic members 7A2/7B2, but the elastic members 7A2/7B2 are urged first, so that the force urging the developing roller 2 toward the photosensitive drum 8 can be regulated by the elastic members 7A2/7B2, and finally, the contact force between the developing roller 2 and the photosensitive drum 8 is maintained within a suitable range, and the image forming quality of the developing cartridge 10 can be ensured.

In some embodiments, when the urging member 9 applies the urging force to the pressing piece 7A3/7B3, the base portion 7A1/7B1 urges the casing 1 to move by the first lid assembly 5/second lid assembly 6, eventually bringing the developing roller 2 and the photosensitive drum 6 close to each other; that is, regardless of whether the base portions 7A1/7B1 are directly connected to the casing 1 or connected to the first cover assembly 5/the second cover assembly 6, the base portions 7A1/7B1 can always transmit the urging force applied by the urging member 9 to the casing 1, thereby causing the casing 1 to bring the developing roller 2 and the photosensitive drum 6 close to or away from each other.

The elastic members 7A2/7B2 are located on the-y direction side (rear side) of the base portions 7A1/7B1 in the y direction, i.e., the elastic members 7A2/7B2 are further away from the developing roller 2 than the base portions 7A1/7B1, and an accommodating chamber for accommodating the elastic members 7A2/7B2 between the developing roller 2 and the base portions 7A1/7B1 will no longer be required, and the structures of the casing 1, the first cover assembly 5, and the second cover assembly 6 can be simplified; further, when the elastic members 7A2/7B2 are mounted, no part of the rear side of the base portion 7A1/7B1 interferes with the elastic members 7A2/7B2, so that the mounting of the elastic members 7A2/7B2 becomes smoother. When viewed in the z direction, the elastic members 7A2/7B2 are located on the-z direction side of the base portions 7A1/7B1, and likewise, the elastic members 7A2/7B2 are further away from the developing roller than the base portions 7A1/7B1, and also have the above-described advantageous effects.

In some embodiments, the elastic members 7A2/7B2 can be replaced by sponge, rubber or other elastic ribs, and the like, so that the selectable range of the elastic members 7A2/7B2 is greatly expanded.

[ example two ]

Fig. 4 is a perspective view of a non-driving end cap according to a second embodiment of the present invention; fig. 5 is a side view of a non-driving end cap according to a second embodiment of the present invention, viewed in a longitudinal direction.

In this embodiment, the elastic member 7A2/7B2 and the pressing member 7A3/7B3 in the force receiving assembly 7A/7B are simplified to be a cantilever that can receive the force and can be elastically deformed after being applied with the force, and thus, the cantilever can be regarded as at least one of the elastic member 7A2/7B2 and the pressing member 7A3/7B 3.

Taking the second force receiving member 7B provided at the non-driving end cap 6 as an example, the structure of the first force receiving member 7A may be identical to that of the second force receiving member 7B.

The second force receiving member 7B includes a base 7B1 fixedly connected to the non-driving end cap 6 and a cantilever 7B5 provided on the base 7B1, the cantilever 7B5 being located on the-y direction side (rear side) of the base 7B1 in the y direction so that the cantilever 7B5 is further away from the developing roller 2 than the base 7B1, or the cantilever 7B5 being located on the-z direction side of the base 7B1 in the z direction, and likewise, the cantilever 7B5 being further away from the developing roller 2 than the base 7B 1.

The force receiving member 7B having the cantilever 7B5 has advantages in addition to the advantages described in the first embodiment, the structure of the cantilever 7B5 is simpler than the structure of the combined body of the elastic member 7B2 and the pressing member 7B3, the manufacturing is facilitated, and the step of mounting the cantilever 7B5 can be omitted when the cantilever 7B5 can also be formed integrally with the base 7B 1.

[ third example ]

On the basis of the above-described first and second embodiments, the base portion 7A1/7B1 in the present embodiment is changed.

With respect to the first force-receiving element 7A, whether the base 7A1 is connected to the housing 1 or to the first cover element 5, the base 7A1 is movable relative to the housing 1/first cover element 5, for example, in a rotational or sliding manner.

Fig. 6 shows a structure in which the base portion 7A1 is rotatably mounted on the driving inner cover 51, wherein the base portion 7A1 and the driving inner cover 51 are combined by means of shaft hole fitting, and in some embodiments, the base portion 7A1 may be further combined with the driving outer cover 52 or the housing 1.

For the second force-receiving element 7B, the base 7B1 can be connected to either the non-driving end cap 6 or the housing 1, but the base 7B1 can also be arranged to move relative to the non-driving end cap 6 or the housing 1, either rotationally or slidably.

When the base 7A1/7B1 is arranged to rotate relative to the housing 1/first cover assembly 5/second cover assembly 6, preferably the axis of rotation of the base 7A1/7B1 is parallel to the x-direction; when the base portion 7A1/7B1 is configured to slide relative to the housing 1/the first cover assembly 5/the second cover assembly 6, it is preferable that the sliding direction of the base portion 7A1/7B1 coincides with the moving direction of the force application member 9, and both of the above configurations are advantageous in that the force applied by the force application member 9 can be quickly and efficiently transmitted to the housing 1.

Understandably, when the base 7A1/7B1 is movably arranged relative to the housing 1 or the first cover assembly 5/the second cover assembly 6, the housing 1 or the first cover assembly 5/the second cover assembly 6 also needs to be provided with a limiting piece for limiting the rotation range of the base 7A1/7B1, and the limiting piece has at least one of the following functions, firstly, the limiting piece can be used for preventing the base 7A1/7B1 from falling off; in the second aspect, the base portion 7A1/7B1 can transmit the acting force applied by the force application member 9 to the housing 1 through the restriction member, so that the housing 1 drives the developing roller 2 to approach or separate from the photosensitive drum 8; in the third aspect, when the instantaneous force applied to the base portion 7A1/7B1 by the urging member 9 is excessive, the base portion 7A1/7B1 needs to move a certain distance to abut against the restricting member, and therefore, the rotatable base portion 7A1/7B1 can play a role of cushioning for the base portion 7A1/7B1 while preventing the base portion 7A1/7B1 from being broken or broken.

In summary, the elastic members 7A2/7B2 in the force receiving mechanism are arranged such that the elastic members 7A2/7B2 are each further from the developing roller 2 than the base portion 7A1/7B1 in the y direction or the z direction, whereby the following advantageous effects can be produced:

1. no matter the shell 1 or the first cover assembly 5/the second cover assembly 6 is provided with a containing cavity for containing an elastic piece, the structures of the shell 1 and the first cover assembly 5/the second cover assembly 6 can be simplified, and the manufacturing precision requirement can be reduced;

2. the elastic members 7A2/7B2 are not interfered by other parts of the developing cartridge during the mounting process, and thus, the mounting efficiency of the elastic members 7A2/7B2 can be improved;

3. the material of the elastic member 7A2/7B2 can be selected in various ways, for example, the elastic member 7A2/7B2 can be a compression spring, or a sponge, rubber, elastic rib, etc., and the volume of the elastic member 7A2/7B2 can also be conveniently adjusted according to the design requirement, thus, the design freedom of the elastic member 7A2/7B2 is high.

4. When the cantilever 7B5 is a kind of elastic member, the structure of the force receiving assembly can be simplified, and further, when the cantilever 7B5 is formed integrally with the housing 1 or the first cover assembly 5/second cover assembly 6, the structure of the force receiving assembly becomes simpler, and the mounting step of the cantilever 7B5 can be omitted.

Claims

1. A developing cartridge detachably mountable to an image forming apparatus provided with a force application member, the developing cartridge including a casing accommodating a developer and a developing roller rotatably provided in the casing, the developing roller for conveying the developer toward a surface of a photosensitive drum disposed opposite thereto,

the developing cartridge further includes a base portion provided at a longitudinal end portion of the casing for transmitting the urging force applied by the urging member to the casing so that the developing roller and the photosensitive drum approach or separate from each other, and an elastic member connected to the base portion;

the elastic member is further away from the developing roller than the base portion in a direction along a line connecting the center of the base portion and the center of the developing roller.

2. A developing cartridge according to claim 1, wherein the elastic member is farther from the developing roller than the base portion in a moving direction of the urging member.

3. A developing cartridge according to claim 1, further comprising a cover member at a longitudinal end of the casing, the base portion being connected to the cover member or the casing.

4. A developing cartridge according to claim 3, wherein the base portion is fixedly connected with the lid assembly or the casing.

5. A developing cartridge according to claim 3, wherein the base portion is movably connected with the cap assembly or the casing.

6. A developing cartridge according to claim 5, wherein when the base is provided to rotate relative to the lid assembly or the casing, the rotational axis of the base is parallel to the longitudinal direction of the developing cartridge; when the base is provided to slide relative to the cover assembly or the housing, the sliding direction of the base coincides with the moving direction of the force application member.

7. The developing cartridge according to claim 5, wherein when the base portion is provided to rotate relative to the lid assembly or the casing, the developing cartridge further comprises a restricting member provided on the lid assembly or the casing for preventing the base portion from coming off and/or transmitting the urging force applied by the urging member to the casing.

8. A developing cartridge according to any one of claims 1-7, further comprising a pressing member abutting against the elastic member, the pressing member being for receiving the urging force applied by the urging member.

9. A developing cartridge according to any one of claims 1-7, wherein the elastic member is a cantilever connected to the base.