CN216956670U - Cartridge for electrophotographic image forming apparatus - Google Patents
Cartridge for electrophotographic image forming apparatus Download PDFInfo
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- CN216956670U CN216956670U CN202220422096.0U CN202220422096U CN216956670U CN 216956670 U CN216956670 U CN 216956670U CN 202220422096 U CN202220422096 U CN 202220422096U CN 216956670 U CN216956670 U CN 216956670U
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- photosensitive drum
- cartridge
- image forming
- forming apparatus
- coupling member
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Abstract
The utility model discloses a cartridge for an electrophotographic image forming apparatus. The cartridge of an embodiment includes a photosensitive drum and a drive assembly connected to the photosensitive drum, the drive assembly including a link and at least one swing arm rotatably disposed within the link; the swing arm comprises a driving force receiving part, an abutted part and a rotating shaft positioned between the driving force receiving part and the abutted part, and the abutted part is further away from the photosensitive drum than the driving force receiving part in the axial direction of the photosensitive drum; the connecting piece comprises a first connecting piece and a second connecting piece which are coaxially arranged, the first connecting piece is connected with the photosensitive drum, the second connecting piece is assembled and connected with the first connecting piece in the axial direction of the photosensitive drum, and the rotating shaft is rotatably clamped between the first connecting piece and the second connecting piece. The box has the advantages of convenient assembly of the driving component and stable and reliable driving force transmission structure.
Description
Technical Field
The present invention relates to a cartridge for detachable attachment to an electrophotographic image forming apparatus.
Background
Electrophotographic image forming apparatuses such as laser printers, copiers, facsimile machines, and the like generally have a process cartridge or a photosensitive drum cartridge detachably mounted; the photosensitive drum cartridge has a photosensitive drum, and the process cartridge integrates the photosensitive drum and the developing roller. A cartridge having a photosensitive drum generally includes a drive assembly connected to the photosensitive drum for receiving a rotational drive force from an electrophotographic image forming apparatus to drive the photosensitive drum to rotate.
An electrophotographic image forming apparatus of the related art has a drive shaft for outputting a rotational driving force to a drive assembly, the drive shaft having a concave portion and an abutting portion, the concave portion being located on a front side of the abutting portion in an axial direction of the drive shaft. In a process cartridge used in such an electrophotographic image forming apparatus, a drive assembly has a cylindrical coupling member and an engaging portion located inside the coupling member, the engaging portion being connected to the coupling member through an elastic deformation portion; in mounting the process cartridge to the electrophotographic image forming apparatus, the drive shaft is inserted into the coupling member, the elastically deformable portion is deformed and then restored to cause the engaging portion to engage with the recessed portion of the drive shaft, and the coupling member rotates the photosensitive drum with the rotation of the drive shaft. Such a cartridge for an electrophotographic image forming apparatus has a drawback in that, with frequent stress of the driving assembly, there is a risk of breakage of the engaging portion and the coupling member, thereby affecting stable transmission of the driving force.
In order to solve this problem, another cartridge of the prior art employs a configuration in which a swing arm is provided inside the coupling to receive the rotational driving force, the swing arm including a driving force receiving portion, an abutted portion, and a rotating shaft between the driving force receiving portion and the abutted portion; in mounting the cartridge for an electrophotographic image forming apparatus to the electrophotographic image forming apparatus, the abutted portion abuts against the abutting portion on the drive shaft, and the swing arm is correspondingly rotated about the rotary shaft, so that the driving force receiving portion is rotated to a position engaging with the recess portion on the drive shaft, whereby the rotational driving force can be received from the electrophotographic image forming apparatus. However, in the cartridge for the electrophotographic image forming apparatus, the swing arm is inconvenient to install, and there is a drawback that the assembling efficiency of the driving assembly is low.
Disclosure of Invention
A primary object of the present invention is to provide a cartridge for an electrophotographic image forming apparatus in which a driving assembly is conveniently assembled and a rotational driving force can be stably transmitted.
In order to achieve the above-described primary object, an embodiment of the present invention discloses a cartridge for an electrophotographic image forming apparatus, including a photosensitive drum and a drive assembly connected to the photosensitive drum, the drive assembly including a coupling member and at least one swing arm rotatably disposed within the coupling member; the swing arm comprises a driving force receiving part, an abutted part and a rotating shaft positioned between the driving force receiving part and the abutted part, and the abutted part is farther away from the photosensitive drum than the driving force receiving part in the axial direction of the photosensitive drum; the coupling piece comprises a first coupling piece and a second coupling piece which are coaxially arranged; the first coupling member is connected to the photosensitive drum, the second coupling member is assembled to the first coupling member in the axial direction of the photosensitive drum, and the rotating shaft is rotatably held between the first coupling member and the second coupling member.
Preferably, the swing arm is located outside the photosensitive drum in the axial direction of the photosensitive drum.
According to one embodiment of the present invention, the second coupling member includes a cylindrical body having at least one recess at an end thereof connected to the first coupling member, the first coupling member having a protrusion engaged with the recess; the front end of bellying is equipped with first arc wall, and the bottom surface of depressed part is equipped with the second arc wall, and first arc wall and second arc wall form the pivot groove that holds the swing arm pivot.
In an alternative scheme, a first limiting groove is formed on the radial inner side of the protruding portion, and opposite side walls of the first limiting groove are used for limiting the driving force receiving portion in the axial direction of the rotating shaft.
Further, the bottom surface of the first stopper groove forms a first rotation stopper portion, and when the driving force receiving portion abuts against the first rotation stopper portion, the abutted portion is located at a position closest to the rotation center of the coupling.
In an optional scheme, the inner wall of the cylindrical main body is provided with a second limiting groove, and opposite side walls of the second limiting groove are used for limiting the abutted part in the axial direction of the rotating shaft.
In an alternative, the inner wall of the cylindrical main body has a second rotation restricting portion, and the driving force receiving portion is located at the rotational driving force receiving position when the abutted portion abuts against the second rotation restricting portion.
According to an embodiment of the present invention, the photosensitive drum has a hollow cavity into which the first coupling member and the second coupling member are partially inserted, and a front end of the protruding portion protrudes outside the photosensitive drum in an axial direction of the photosensitive drum.
According to an embodiment of the present invention, a radially outer side of the first coupling member and/or the second coupling member has a mounting positioning portion that abuts an axial end of the photosensitive drum for defining a relative position of the coupling member and the photosensitive drum.
According to a specific embodiment of the present invention, the number of the swing arms, the number of the convex portions, and the number of the concave portions are three, and the swing arms, the convex portions, and the concave portions are distributed at intervals in the circumferential direction of the coupling.
In the embodiment of the utility model, the swing arm is arranged in the connecting piece to receive the rotary driving force, so that the connecting piece has the advantages of stable and reliable driving force transmission structure; further, the connecting piece comprises a first connecting piece and a second connecting piece which are assembled and connected in the axial direction of the photosensitive drum, and the rotating shaft of the swing arm is rotatably clamped between the first connecting piece and the second connecting piece, so that the swing arm can be rapidly installed, and the assembly efficiency of the driving assembly is improved.
To more clearly illustrate the objects, technical solutions and advantages of the present invention, the present invention will be further described in detail with reference to the accompanying drawings and detailed description.
Drawings
FIG. 1 is an assembled configuration view of a photosensitive drum and a driving assembly in the embodiment;
FIG. 2 is an exploded view of the first construction of the photosensitive drum and the drive assembly in the embodiment;
FIG. 3 is an axial sectional view of the photosensitive drum and the drive assembly in the embodiment;
FIG. 4 is a second exploded perspective view of the photosensitive drum and the driving unit in the embodiment;
FIG. 5 is a first exploded view of the drive assembly of the embodiment;
fig. 6 is a second exploded view of the drive assembly of the embodiment.
Detailed Description
As described previously, the cartridge having the photosensitive drum includes a driving assembly connected to the photosensitive drum for receiving a rotational driving force from the electrophotographic image forming apparatus to drive the photosensitive drum to rotate. In the embodiment of the present invention, as shown in fig. 1 and 2, a drive assembly 20 is attached to an axial end of the photosensitive drum 10, and after the cartridge is mounted to the electrophotographic image forming apparatus, the drive assembly 20 engages with a drive shaft of the electrophotographic image forming apparatus, receiving a driving force from the drive shaft for rotating the photosensitive drum 10.
As shown in fig. 3 and 4, the drive assembly 20 includes a coupling member made up of a first coupling member 21 and a second coupling member 22; the photosensitive drum 10 has a hollow cavity 11, and the first coupling member 21 and the second coupling member 22 are partially inserted into the hollow cavity 11. Further, the drive assembly 20 further comprises a swing arm 23 rotatably disposed within the coupling; wherein, the quantity of swing arm 23 can be 1 ~ 3, preferably three as shown in figure 4, and three swing arm 23 is at the interval distribution in the circumference of connector. Preferably, as shown in fig. 3, the swing arm 23 is located outside the photosensitive drum 10 in the axial direction of the photosensitive drum 10 (i.e., to the right of the axial end of the photosensitive drum 10 marked by a chain line L in fig. 3).
In the embodiment of the present invention, the first coupling member 21 is connected to the photosensitive drum 10, and the second coupling member 22 is disposed coaxially with the first coupling member 21 and is assembled with the first coupling member 21 in the axial direction of the photosensitive drum 10. Specifically, as shown in fig. 4 and 5, the second coupling member 22 includes a cylindrical main body 221 and a connecting end 222, the connecting end 222 has recessed portions 223 arranged along the axial direction of the coupling member, the number of the recessed portions 223 may be 1 to 3, preferably three, the three recessed portions 223 are distributed at intervals in the circumferential direction of the coupling member; the first coupling member 21 has a convex portion 211 provided corresponding to the concave portion 223, the convex portion 211 is inserted into the concave portion 223 in the axial direction of the photosensitive drum 10, and the leading end of the convex portion 211 protrudes outside the photosensitive drum 10 in the axial direction of the photosensitive drum 10. In other embodiments of the present invention, the concave portion 223 and the convex portion 211 may be disposed at an angle (e.g., less than 45 degrees) with respect to the axial direction of the coupling. Form the grafting cooperation between depressed part 223 and the bellying 211, can stably transmit rotary drive power between first connector 21 and second connector 22, and simple structure, the equipment is convenient, the automated production of being convenient for.
In the embodiment of the present invention, the connection between the first coupling member 21 and the second coupling member 22 may be various detachable or non-detachable connection structures such as an adhesive connection, a snap connection, a welding connection, or a screw connection, which is not limited in the present invention. In an alternative scheme, as shown in fig. 6, a first connecting hole 215 is formed on the first coupling member 21, a second connecting hole 226 is formed on the connecting end 222 of the second coupling member, and a screw passes through the first connecting hole 215 and then forms a threaded connection with the second connecting hole 226, so that the first coupling member 21 and the second coupling member 22 are fixed to each other.
Referring to fig. 5 again, in the embodiment of the present invention, the swing arm 23 includes a rotating shaft 231, a driving force receiving portion 232, and an abutted portion 233; among them, the rotating shaft 231 is located between the driving force receiving portion 232 and the abutted portion 233, and the abutted portion 233 is further away from the photosensitive drum 10 in the axial direction of the photosensitive drum 10 than the driving force receiving portion 232 (see fig. 3). Preferably, the rotation shaft 231 is disposed perpendicular to the axial direction of the coupling.
The rotation shaft 231 is rotatably sandwiched between the first coupling member 21 and the second coupling member 22. In the embodiment of the present invention, as shown in fig. 5 and 6, the front end of the protruding portion 211 is provided with a first arc-shaped slot 212, the bottom surface of the recessed portion 223 is provided with a second arc-shaped slot 225, the first arc-shaped slot 212 and the second arc-shaped slot 225 form a pivot slot for accommodating the rotating shaft 231, and the rotating shaft 231 and the pivot slot preferably form a clearance fit.
As shown in fig. 4, the inner wall of the cylindrical main body 221 is provided with a second stopper groove 224, and opposite side walls of the second stopper groove 224 are used for stopping the contacted portion 233 in the axial direction of the rotating shaft 231. As shown in fig. 5, a first limiting groove 213 is formed on the radially inner side of the protruding portion 211, and opposite side walls of the first limiting groove 213 limit the driving force receiving portion 232 in the axial direction of the rotating shaft 231. The arrangement of the first limit groove 213 and the second limit groove 224 can avoid the swing arm 23 from shaking in the circumferential direction of the coupling, so that the rotational driving force can be transmitted more stably.
Further, as shown in fig. 3, the bottom surface 2131 of the first stopper groove 213 may be formed as a first rotation stopper portion; when the driving force receiving portion 232 abuts against the first rotation restricting portion, the abutted portion 233 is located at a position closest to the rotation center of the coupling (this state is not shown in the figure). The inner wall of the cylindrical main body 221 has a second rotation restricting portion, which may be an inner circumferential surface of the cylindrical main body 221, or a protrusion or a recess provided on the inner circumferential surface. In the present embodiment, with the inner surface of the cylindrical main body 221 as the second rotation restricting portion, the driving force receiving portion 232 is located at the rotational driving force receiving position (the state shown in fig. 3) when the abutted portion 233 abuts against the inner surface of the cylindrical main body 221.
The radially outer side of the first coupling 21 and/or the second coupling 22 may have a mounting positioning portion that abuts an axial tip of the photosensitive drum 10 to define an axial mounting position of the coupling with respect to the photosensitive drum. In an alternative embodiment, as shown in fig. 4, the first coupling 21 may be provided thereon with a first mounting and positioning portion 214, the first mounting and positioning portion 214 being located radially outside the protruding portion 211 and abutting against the axial end of the photosensitive drum 10; the second coupling member 22 may be provided with a second mounting and positioning portion 227, and the second mounting and positioning portion 227 is located radially outside the coupling end 222 and abuts against the axial end of the photosensitive drum 10.
When the cartridge is mounted to the electrophotographic image forming apparatus having the drive shaft, as the drive shaft of the image forming apparatus is inserted into the interior of the coupling, the abutting portion on the drive shaft comes into contact with the abutted portion 233 of the swing arm 23 and forces the abutted portion 233 to rotate about the rotary shaft 231 in a direction away from the center of rotation of the coupling, and the driving force receiving portion 232 correspondingly rotates in a direction closer to the center of rotation of the coupling to a state as shown in fig. 3, so that the driving force receiving portion 232 engages with the recess of the drive shaft to receive the rotational driving force of the drive shaft and thereby drive the photosensitive drum 10 to rotate.
Although the present invention has been described above by way of examples, it should be understood that the above examples are merely illustrative of possible embodiments of the present invention and should not be construed as limiting the scope of the present invention, i.e., equivalent substitutions or changes made by those skilled in the art in light of the present invention should also be covered by the scope of the present invention as defined by the appended claims.
Claims (10)
1. A cartridge for an electrophotographic image forming apparatus, comprising a photosensitive drum and a drive assembly connected to the photosensitive drum, the drive assembly comprising a coupling and at least one swing arm rotatably disposed within the coupling; wherein the swing arm includes a driving force receiving portion, an abutted portion, and a rotating shaft between the driving force receiving portion and the abutted portion, the abutted portion being farther from the photosensitive drum than the driving force receiving portion in an axial direction of the photosensitive drum; the method is characterized in that: the coupling member comprises a first coupling member and a second coupling member which are coaxially arranged, the first coupling member is connected with the photosensitive drum, the second coupling member is assembled and connected with the first coupling member in the axial direction of the photosensitive drum, and the rotating shaft is rotatably clamped between the first coupling member and the second coupling member.
2. A cartridge for an electrophotographic image forming apparatus according to claim 1, characterized in that: the swing arm is located outside the photosensitive drum in an axial direction of the photosensitive drum.
3. A cartridge for an electrophotographic image forming apparatus according to claim 1, characterized in that: the second coupling piece comprises a cylindrical main body, one end of the cylindrical main body, which is connected with the first coupling piece, is provided with at least one concave part, and the first coupling piece is provided with a convex part matched with the concave part; the front end of bellying is equipped with first arc wall, the bottom surface of depressed part is equipped with the second arc wall, first arc wall with the second arc wall forms and holds the pivot groove of pivot.
4. A cartridge for an electrophotographic image forming apparatus according to claim 3, characterized in that: the radial inner side of the protruding portion is provided with a first limiting groove, and the opposite side walls of the first limiting groove are used for limiting the driving force receiving portion in the axial direction of the rotating shaft.
5. A cartridge for an electrophotographic image forming apparatus according to claim 4, characterized in that: the bottom surface of the first stopper groove forms a first rotation stopper portion, and when the driving force receiving portion abuts against the first rotation stopper portion, the abutted portion is located at a position closest to a rotation center of the coupling.
6. A cartridge for an electrophotographic image forming apparatus according to claim 3, characterized in that: the inner wall of the cylindrical main body is provided with a second limiting groove, and the opposite side walls of the second limiting groove are used for limiting the abutted part in the axial direction of the rotating shaft.
7. A cartridge for an electrophotographic image forming apparatus according to claim 3, characterized in that: the inner wall of the cylindrical main body is provided with a second rotation limiting part, and when the abutted part is abutted against the second rotation limiting part, the driving force receiving part is located at a rotation driving force receiving position.
8. A cartridge for an electrophotographic image forming apparatus according to claim 3, characterized in that: the photosensitive drum is provided with a hollow cavity, the first coupling piece and the second coupling piece are partially inserted into the hollow cavity, and the front end of the protruding portion extends out of the photosensitive drum in the axial direction of the photosensitive drum.
9. A cartridge for an electrophotographic image forming apparatus according to claim 3, characterized in that: the swing arm, the bellying with the quantity of depressed part is three, and all is in the interval distribution in the circumference of coupling piece.
10. A cartridge for an electrophotographic image forming apparatus according to claim 1, characterized in that: the first coupling member and/or the second coupling member has a mounting positioning portion on a radially outer side thereof, the mounting positioning portion being abutted against an axial end of the photosensitive drum.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220422096.0U CN216956670U (en) | 2022-02-28 | 2022-02-28 | Cartridge for electrophotographic image forming apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220422096.0U CN216956670U (en) | 2022-02-28 | 2022-02-28 | Cartridge for electrophotographic image forming apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216956670U true CN216956670U (en) | 2022-07-12 |
Family
ID=82292737
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220422096.0U Active CN216956670U (en) | 2022-02-28 | 2022-02-28 | Cartridge for electrophotographic image forming apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216956670U (en) |
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2022
- 2022-02-28 CN CN202220422096.0U patent/CN216956670U/en active Active
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