CN218547254U

CN218547254U - Coupling assembly of photosensitive drum, photosensitive drum assembly and cartridge of electrophotographic image forming apparatus

Info

Publication number: CN218547254U
Application number: CN202222738514.XU
Authority: CN
Inventors: 闻艺俊
Original assignee: Zhuhai Chaojun Technology Co ltd
Current assignee: Zhuhai Chaojun Technology Co ltd
Priority date: 2022-10-18
Filing date: 2022-10-18
Publication date: 2023-02-28
Anticipated expiration: 2032-10-18

Abstract

The utility model discloses a coupling subassembly, sensitization drum subassembly and electrophotographic image forming apparatus's of sensitization drum box. The coupling assembly of an embodiment includes a coupling member, a pusher member, and a resilient element; the pushing piece is movably connected with the connecting piece but is not used for receiving the rotary driving force; wherein the pusher is movable relative to the coupling member in an axial direction of the coupling member, and the resilient element is adapted to cause the pusher to project from an outer end of the coupling member. The photosensitive drum assembly comprises a photosensitive drum and a connecting assembly arranged at one end of the photosensitive drum, and when the cartridge provided with the photosensitive drum assembly is installed in the electrophotographic image forming device, the pushing piece can be abutted against the driving head in the electrophotographic image forming device in an inclined state, so that the inclination angle of the driving head can be adjusted. The utility model discloses in, but the top pushes away the piece and sets up to the axial is flexible, can enough adjust the inclination of driving head, is difficult to again influence the dismouting machine operation of box.

Description

Coupling assembly of photosensitive drum, photosensitive drum assembly and cartridge of electrophotographic image forming apparatus

Technical Field

The utility model relates to the field of electronic photographic imaging equipment; and more particularly, to a cartridge for an electrophotographic image forming apparatus, a photosensitive drum assembly of the cartridge, and a coupling assembly of the photosensitive drum.

Background

In an electrophotographic image forming apparatus such as a laser printer, a copier, a facsimile machine, etc., it is common to have a detachably mountable cartridge having a rotatable photosensitive drum, one end of which is provided with a power receiving portion that can receive a rotational driving force from a driving head in the electrophotographic image forming apparatus during image formation, and thereby rotate the photosensitive drum.

In an electrophotographic image forming apparatus of the related art, a driving head is tiltably provided with respect to a rotation axis in its operating state. Accordingly, a movable urging member for abutting against the driving head after the cartridge loading machine to thereby align the driving head in a non-tilted state is required to be provided on the cartridge used in such an electrophotographic image forming apparatus, so that a transmission connection can be formed between the power receiving portion and the driving head.

In the related art cartridge, the urging member is provided to abut against and tilt the driving head from the radially outer side of the driving head, but when the mounting and demounting operation of the cartridge is performed, the urging member thus provided easily interferes with the electrophotographic image forming apparatus, affecting the mounting and demounting operation of the cartridge.

Disclosure of Invention

The utility model mainly aims at providing a photosensitive drum coupling assembly which can adjust the inclination angle of a driving head and is not easy to influence the operation of a box dismounting machine.

Another object of the present invention is to provide a photosensitive drum assembly having the above coupling assembly and a cartridge having the photosensitive drum assembly.

In order to achieve the above-described main object, a first aspect of the present invention discloses a coupling assembly of a photosensitive drum, comprising:

a coupling member;

the pushing piece is movably connected with the connecting piece but is not used for receiving the rotary driving force; wherein the ejector is movable relative to the coupling member in an axial direction of the coupling member;

and an elastic member for causing the pusher to protrude from the outer end of the coupling member.

According to a specific embodiment of the present invention, the front end of the pushing member is formed into a tapered shape.

According to an embodiment of the invention, the elastic element is arranged in the cavity of the coupling.

According to a specific embodiment of the present invention, the inner end of the connecting member is connected to a bottom plate, and the pushing member has a guide rod; the elastic element is a compression spring sleeved on the guide rod, one end of the compression spring is abutted to the bottom plate, and the other end of the compression spring is abutted to an axial limiting part arranged on the pushing piece.

Furthermore, a first guide hole is formed in the bottom plate, and the guide rod is in sliding fit with the first guide hole.

According to the utility model discloses a concrete implementation mode is equipped with power receiving part on the connector, and power receiving part is used for receiving rotary driving power.

Further, the power receiving portion has a second guide hole through which the pushing member passes.

According to a specific embodiment of the present invention, the coupling has a gear portion.

The second aspect of the utility model discloses a sensitization drum subassembly, including the sensitization drum, the one end of sensitization drum is equipped with as above arbitrary hookup subassembly, the connector and the sensitization drum of this hookup subassembly are connected.

Further, the urging member is disposed coaxially with the rotation axis of the photosensitive drum.

Further, the other end of the photosensitive drum opposite to the coupling member is provided with a transmission gear.

A third aspect of the present invention discloses a cartridge of an electrophotographic image forming apparatus, including any one of the photosensitive drum assemblies described above.

The technical scheme of the utility model following beneficial effect has:

in the utility model, the connecting component of the photosensitive drum is provided with the pushing piece for adjusting the inclination angle of the driving head in the electrophotographic imaging equipment, and the pushing piece can axially elastically stretch relative to the connecting piece, so that the operation of a smooth dismounting machine of the box is not easily influenced; after the box packing machine is installed, the pushing piece can push the driving head in an inclined state along the axial direction of the connecting piece, and then the inclination angle of the driving head is adjusted.

It is particularly emphasized that the ejector of the present invention, although it can adjust the tilt angle of the driving head in the electrophotographic image forming apparatus, is not used to receive the rotational driving force from the driving head.

To more clearly illustrate the objects, technical solutions and advantages of the present invention, the present invention will be described in further detail with reference to the accompanying drawings and detailed description.

Drawings

FIG. 1 is a view showing a structure of a cartridge according to embodiment 1 of the present invention, in which a photosensitive drum assembly is in a state of being detached from a cartridge body;

FIG. 2 is a structural view of a photosensitive drum assembly according to embodiment 1 of the present invention;

fig. 3 is an exploded view of the photosensitive drum assembly according to embodiment 1 of the present invention;

fig. 4 is a first axial sectional view of the photosensitive drum assembly in embodiment 1 of the present invention, in which the maximum protruding position of the pushing member is shown;

FIG. 5 is a second axial cross-sectional view of the photosensitive drum assembly according to embodiment 1 of the present invention, showing a retracted position of the pushing member;

FIG. 6 is a schematic view of the ejector applying force to the drive head in an inclined state;

FIG. 7 is a schematic view of the structure of the ejector adjusting the driving head to a non-tilted state;

fig. 8 is a structural view of a photosensitive drum assembly in embodiment 2 of the present invention;

fig. 9 is a structural view of a photosensitive drum assembly in embodiment 3 of the present invention.

Detailed Description

Example 1

As shown in fig. 1 to 3, a cartridge disclosed in embodiment 1 includes a photosensitive drum assembly 20 rotatably provided on a cartridge frame 10, the photosensitive drum assembly 20 including a photosensitive drum 21 and a coupling assembly 22 provided at one end of the photosensitive drum 21, the coupling assembly 22 including a coupling member 221 connected to the photosensitive drum 21 and partially inserted inside the photosensitive drum 21, the coupling member 221 being provided with a power receiving portion 222. The electrophotographic image forming apparatus has a tiltable drive head 100 therein (see fig. 6 and 7), and a power receiving portion 222 can receive a rotational driving force from the drive head 100 and rotate the photosensitive drum 21 via a coupling 221.

In embodiment 1, the power receiving portion 222 is fixedly mounted on the coupling 221. In other embodiments of the present invention, the power receiving portion 222 and the coupling member 221 may be an integrated structure, or may form a relatively movable transmission connection with the coupling member 221; in addition, the power receiving portion 222 and the coupling 221 may be directly connected or may be connected through an intermediate transmission member. In other words, the connection therebetween is sufficient as long as the power receiving portion 222 can transmit the rotational driving force to the coupling 221.

Further, in the embodiment, the coupling assembly 22 further includes an ejector 223 and a compression spring 224 as an example of an elastic member. Wherein, the pushing member 223 is movably connected to the coupling member 221 and is movable relative to the coupling member 221 in the axial direction of the coupling member 221 (i.e., the axial direction of the photosensitive drum 21); a compression spring 224, which is an example of an elastic member, acts on the pusher 223, causing the pusher 223 to protrude from the outer end of the coupling 221 (i.e., the end relatively distant from the photosensitive drum 21). Preferably, the pushing member 223 is provided coaxially with the coupling 221 and the rotation axis of the photosensitive drum 21.

In an embodiment, as shown in fig. 3, the inner end of the coupling member 221 is connected to a base plate 225, and a first guide hole 2251 is formed on the base plate 225; the pusher 223 has a guide rod 2231, and the guide 2231 is in sliding engagement with the first guide hole 2251. The power receiving portion 222 is provided with a second guide hole 2221, and the pushing member 223 passes through the second guide hole 2221 and can be protruded from the outer end of the power receiving portion 222 by the compression spring 224. Among them, the front end 2232 of the pushing piece 223 is preferably formed in a tapered shape so as to better abut against the driving head 100 and more favorably avoid interference with the electrophotographic image forming apparatus during the changer process.

A compression spring 224 may be disposed within the cavity of the coupling 221. Specifically, the compression spring 224 may be sleeved on the guide rod 2231; one end of the compression spring 224 abuts against the bottom plate 225, and the other end of the compression spring 224 abuts against an axial stopper 2233 provided on the pusher 223. A side of the axial stopper portion 2233 opposite to the compression spring 224 may abut against a front cover plate or the power receiving portion 222 of the coupling member 221 for defining a maximum protruding position of the pusher 223 relative to the coupling member 221; the axial position-limiting portion 2233 may be formed in a circular plate-shaped structure, but the present invention is not limited thereto.

The pusher 223 is movable toward the outer end of the coupling member 221 to a maximum extended position as shown in fig. 4 by the compression spring 224. When the pusher 223 is forced toward the inner end of the coupling 221, for example, into abutment with the drive head 100, it can move against the force of the compression spring 224 toward the inner end of the coupling 221 to the retracted position as shown in fig. 5.

The drive head 100 is tiltably arranged with respect to the axis of rotation in its operative state. As shown in fig. 6, at the time of cartridge loading (mounting to the electrophotographic image forming apparatus), the ejector 223 in the extended state may abut the drive head 100 in the electrophotographic image forming apparatus, and may apply a force in the F direction to the drive head 100 in the tilted state to change the tilt angle of the drive head 100. Wherein the F direction is parallel to the rotation axis of the photosensitive drum 21.

As shown in fig. 7, the driving head 100 is changed from the tilted state tilted with respect to the rotation axis thereof to the non-tilted state coaxial with the rotation axis thereof by the pusher 223; at the same time, the pusher 223 will move axially inwardly of the coupling 221 against the force of the compression spring 224 in reaction to the drive head 100, facilitating the establishment of a driving connection between the power receiving portion 222 and the drive head 100.

Further, as shown in fig. 2 and 3, a gear portion 226 may be provided on the coupling 221, and the gear portion 226 is preferably formed integrally with the coupling 221. The gear portion 226 may be intermeshed with a gear provided on another rotary member (e.g., a developing roller) in the cartridge for transmitting a rotational driving force to the other rotary member.

Example 2

As shown in fig. 8, embodiment 2 differs from embodiment 1 in that: in embodiment 2, no gear portion is provided on the coupling 221, but a transmission gear 23 is provided on the other end of the photosensitive drum 21 with respect to the coupling 221, and the transmission gear 23 is engaged with a gear provided on another rotating member (e.g., a developing roller) in the cartridge for transmitting a rotational driving force to the other rotating member.

Example 3

As shown in fig. 9, embodiment 3 differs from embodiment 1 in that: the coupling 221 in embodiment 3 is provided with the gear portion 226, but does not have a power receiving portion for receiving a rotational driving force from a driving head in the electrophotographic image forming apparatus; the outer end of the coupling member 221 is provided with a front cover plate 227, the front cover plate 227 abuts against an axial stop 2233 (see fig. 3), and the ejector 223 can project from a guide hole in the front cover plate 227 under the action of a compression spring 224 (also provided in the cavity of the coupling member 221, not visible in fig. 9).

In embodiment 3, the cartridge may further include a developing roller and a developing roller gear (not shown in the figure) provided at an end of the developing roller, and the gear portion 226 may be engaged with the developing roller gear.

In the electrophotographic image forming apparatus to which the cartridge of embodiment 3 is applied, the tiltable drive head is provided with a drive gear portion capable of meshing with the developing roller gear, and the cartridge rear pusher 223 can also push the drive head to move it from the tilted state to the non-tilted state. At the moment, the developing roller gear is meshed with the driving gear part, so that the driving head can drive the developing roller to rotate; at the same time, since the gear portion 226 of the coupling 221 meshes with the developing roller gear, the photosensitive drum 21 can also be rotated simultaneously.

The contents that are not described in detail in embodiments 2 and 3 can refer to embodiment 1, and are not described again.

Although the present invention has been described above by way of examples, it should be understood that the above examples are merely illustrative of the possible embodiments of the present invention and should not be interpreted as limiting the scope of the present invention, i.e. all equivalent permutations or variations that can be made by those skilled in the art in accordance with the present invention are intended to be covered by the scope of the present invention as defined by the appended claims.

Claims

1. A coupling assembly of a photosensitive drum, comprising a coupling member, characterized in that:

a pusher movably connected to the coupling member but not adapted to receive a rotational driving force; wherein the pusher is movable relative to the coupling member in an axial direction of the coupling member;

an elastic member for causing the pusher to protrude from an outer end of the coupling member.

2. The coupling assembly of a photosensitive drum according to claim 1, wherein: the front end of the pushing piece is formed into a conical shape.

3. The coupling assembly of a photosensitive drum according to claim 1, wherein: the resilient element is disposed within the cavity of the coupling.

4. The coupling assembly of a photosensitive drum according to claim 1, wherein: the inner end of the connecting piece is connected with a bottom plate, and the pushing piece is provided with a guide rod; the elastic element is a compression spring sleeved on the guide rod, one end of the compression spring is abutted to the bottom plate, and the other end of the compression spring is abutted to an axial limiting part arranged on the pushing piece.

5. The coupling assembly of a photosensitive drum according to claim 4, wherein: the bottom plate is provided with a first guide hole, and the guide rod is in sliding fit with the first guide hole.

6. The coupling assembly of a photosensitive drum according to claim 1, wherein: the coupling is provided with a power receiving portion for receiving a rotational driving force.

7. The coupling assembly of a photosensitive drum according to claim 6, wherein: the power receiving part is provided with a second guide hole for the pushing piece to pass through.

8. The coupling assembly of a photosensitive drum according to claim 1, wherein: the coupling has a gear portion.

9. A photosensitive drum assembly comprising a photosensitive drum, characterized in that: the photosensitive drum is provided at one end with a coupling assembly as claimed in any one of claims 1 to 8, the coupling member of the coupling assembly being connected to the photosensitive drum.

10. The photosensitive drum assembly according to claim 9, wherein: the pushing piece is arranged coaxially with the rotation axis of the photosensitive drum.

11. The photosensitive drum assembly according to claim 9, wherein: and a transmission gear is arranged at the other end of the photosensitive drum relative to the connecting piece.

12. A cartridge for an electrophotographic image forming apparatus, characterized by comprising the photosensitive drum assembly according to any one of claims 9 to 11.