CN216118398U - Driving force transmission assembly, rotating assembly and processing box - Google Patents
Driving force transmission assembly, rotating assembly and processing box Download PDFInfo
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- CN216118398U CN216118398U CN202122471844.2U CN202122471844U CN216118398U CN 216118398 U CN216118398 U CN 216118398U CN 202122471844 U CN202122471844 U CN 202122471844U CN 216118398 U CN216118398 U CN 216118398U
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Abstract
The utility model relates to a driving force transmission assembly, a rotating assembly and a processing box with the driving force transmission assembly, wherein the driving force transmission assembly comprises a driving part and a driven part which are combined with each other, the driving part is used for receiving driving force from the outside, the driven part is combined with the rotating part and is used for transmitting the driving force to the rotating part, the driven part and the driving part are both cylinders, one of the driven part and the driving part is provided with a plane or a cambered surface used for receiving the driving force, and the other one of the driven part and the driving part is provided with a protrusion used for being combined with the plane or the cambered surface; before the driving part receives the driving force, the driving part can move relative to the driven part; when the driving part receives the driving force, the protrusion is combined with the plane or the cambered surface, and the protrusion is combined with the plane or the cambered surface to transmit the driving force, so that the number of parts of the driving force transmission assembly is reduced, and the structure is greatly simplified.
Description
Technical Field
The present invention relates to the field of electrophotographic image forming, and more particularly to a process cartridge detachably mountable in an electrophotographic image forming apparatus, and a rotating assembly and a driving force transmitting assembly located in the process cartridge.
Background
Chinese patent application No. cn202110616722.x discloses a process cartridge rotatably provided with a developing roller 3 and a photosensitive drum 2, wherein a rotational force transmitting assembly 4 is provided at the end of the photosensitive drum 2, a developing roller gear assembly 5 is provided at the end of the developing roller 3, and the rotational force transmitting assembly 4 and the developing roller gear assembly 5 are located at the same side of the process cartridge. The drive head 10 provided in this process cartridge-adapted laser printer has a gear portion 101 and a coupling portion 102, and when the process cartridge is mounted to the laser printer, the gear portion 101 is combined with the developing roller gear assembly 5, and the coupling portion 102 is combined with the rotational force transmitting assembly 4, so that the developing roller 3 and the photosensitive drum 2 can be driven simultaneously.
In practice, the gear portion 101 and the coupling portion 102 need to be combined with the developing roller gear assembly 5 and the rotational force transmitting assembly 4 at the same time, respectively, and since the components of the developing roller gear assembly 5 engaged with the coupling portion 102 are gears, there is a possibility that the coupling portion 102 and the gears may be not engaged in place when the process cartridge is mounted, which causes a problem that the process cartridge may jump between the gears and the coupling portion 102 when the process cartridge starts to operate, for this reason, the technical solution provided by the above-mentioned patent application cn20211061616722. x is to arrange the gears to be fixedly combined with the developing roller 3 and the guide gear 52 rotatable relative to the developing roller, and to make the coupling portion 102 and the guide gear 52 form a good combination by virtue of the mobility of the guide gear 52.
However, the structure of the developing roller gear assembly 5 is too complicated, and it is necessary to prepare the developing roller gear 51 and the guide gear 52 at the same time, and also to consider the assembling relationship among the developing roller 3, the developing roller gear 51, and the guide gear 52, and thus it is apparent that the structure of the conventional developing roller gear assembly 5 is complicated, which causes problems such as an increase in the number of parts of the process cartridge, an increase in the number of assembling processes, and an increase in cost.
SUMMERY OF THE UTILITY MODEL
In view of the above, the present invention provides a driving force transmission assembly for simplifying a structure of a developing roller receiving a driving force from a laser printer, thereby reducing an assembling process and cost of a process cartridge, and the driving force transmission assembly adopts the following specific scheme:
the driving force transmission assembly is used for transmitting driving force to the rotating piece and comprises a driving piece and a driven piece which are combined with each other, wherein the driving piece is used for receiving the driving force from the outside, the driven piece is combined with the rotating piece and used for transmitting the driving force to the rotating piece, the driven piece and the driving piece are both cylinders, one of the driven piece and the driving piece is provided with a plane or an arc surface used for receiving the driving force, and the other one of the driven piece and the driving piece is provided with a protrusion used for being combined with the plane or the arc surface; before the driving part receives the driving force, the driving part can move relative to the driven part; when the driving member receives the driving force, the protrusion is combined with the flat surface or the arc surface.
Preferably, the driving force transmission assembly further comprises a reset member located between the driving member and the driven member, the reset member being configured to force the protrusion to a position furthest away from the plane or the arc surface before the driving member receives the driving force.
The projection comprises a driving force transmission surface and a supporting surface, the driving force transmission surface is used for being combined with the plane or the cambered surface, and the supporting surface is used for supporting the driving force transmission part; or, the protrusion is a cylinder extending along the rotation axis of the rotating member; or, the protrusion is a sphere.
The driving force transmission component is provided with two protrusions which are opposite in the radial direction, and two planes or cambered surfaces which are opposite in the radial direction and correspond to the protrusions.
The utility model also provides a rotating assembly comprising a rotating member and a driving force transmission assembly as described above, the driving force transmission assembly being provided at one end of the rotating member.
The present invention also provides a process cartridge including a housing and the rotating assembly as described above rotatably disposed in the housing.
Alternatively, the present invention provides a process cartridge detachably mountable to a laser printer provided with a driving force output member, the process cartridge comprising a powder hopper casing and a waste powder hopper casing which are combined with each other, and a second rotating assembly located in the powder hopper casing and a first rotating assembly located in the waste powder hopper casing, the first rotating assembly comprising a first rotating member and a first driving force transmitting assembly which are combined with each other, the second rotating assembly comprising a second rotating member and a driving force transmitting assembly as described above which are combined with each other, the first driving force transmitting assembly being different from the driving force transmitting assembly; when the process cartridge is mounted to the laser printer, the first driving force transmission assembly and the driving force transmission assembly are simultaneously combined with the driving force output member.
A recess for accommodating the driving force output member is formed between the driving force transmission member and the first driving force transmission member in a lengthwise direction of the process cartridge.
As described above, in the driving force transmission assembly of the present invention, the driven member is provided with at least one flat surface or curved surface for receiving the driving force, and the driving member is provided with at least one protrusion combined with the flat surface or curved surface, the driven member is directly combined with the rotating member, and the protrusion is combined with the flat surface or curved surface to transmit the driving force, so that the number of parts of the driving force transmission assembly is reduced, and the structure is greatly simplified.
Drawings
Fig. 1 is a perspective view of a process cartridge according to an embodiment of the present invention.
Fig. 2 and 3 are schematic structural views of a driving force transmission assembly according to an embodiment of the present invention.
Fig. 4 is a side view of the follower in the driving force transmission assembly as viewed along the axis of the developing roller in the first embodiment of the present invention.
Fig. 5 is a side view of the driving member of the driving force transmission assembly as viewed along the axis of the developing roller in the first embodiment of the present invention.
Fig. 6 is a cross-sectional view of the driving member of the driving force transmission assembly engaging with the driven member, as viewed along the axis of the developing roller, in accordance with the first embodiment of the present invention.
Fig. 7 is a side view of the follower in the driving force transmission assembly as viewed along the axis of the developing roller in the second embodiment of the present invention.
Fig. 8 is a side view of the driving member of the driving force transmission assembly as viewed along the axis of the developing roller in the third embodiment of the present invention.
Detailed Description
Embodiments of the present invention are described in detail below with reference to the accompanying drawings.
[ example one ]
Fig. 1 is a perspective view of a process cartridge according to an embodiment of the present invention.
The process cartridge 100 includes a powder hopper 2 and a waste powder hopper 1 which are combined with each other, wherein the powder hopper 2 includes a powder hopper housing 20 and a developing roller 21 rotatably mounted in the powder hopper housing 20, the waste powder hopper 1 includes a waste powder hopper housing 10 and a photosensitive drum 11 rotatably mounted in the waste powder hopper housing 10, the powder hopper housing 20 stores carbon powder, the developing roller 21 supplies the carbon powder to the photosensitive drum 11, and the waste powder hopper housing 10 stores waste powder scraped off from the surface of the photosensitive drum 11 during operation of the process cartridge.
As shown in fig. 1, the process cartridge 100 further includes a first driving force transmission assembly 12 and a second driving force transmission assembly 3, the first driving force transmission assembly 12 and the second driving force transmission assembly 3 are respectively located at the ends of the photosensitive drums 11 and the developing rollers 21, the first driving force transmission assembly 12 and the second driving force transmission assembly 3 are located at the same side of the process cartridge 100, and when the process cartridge 100 is detachably mounted to the laser printer, the first driving force transmission assembly 12 and the second driving force transmission assembly 3 are simultaneously combined with a driving force output member located in the laser printer, thereby respectively driving the photosensitive drums 11 and the developing rollers 21 to rotate. In the process cartridge 100, the first driving force transmission assembly 12 and the second driving force transmission assembly 3 are not opposite to each other along the axial direction of the photosensitive drum 11 or the axial direction of the developing roller 21, that is, the first driving force transmission assembly 12 and the second driving force transmission assembly 3 are arranged in a staggered manner, in the embodiment, the second driving force transmission assembly 3 extends farther than the first driving force transmission assembly 12 relative to the other side (the side opposite to the side where the driving force transmission assembly is arranged) of the process cartridge 100, so that a recessed portion 13 capable of accommodating the driving force output member is formed between the first driving force transmission assembly 12 and the second driving force transmission assembly 3, the recessed portion 13 is equivalent to be arranged on the waste toner bin 1, and the laser printer can be simultaneously combined with the first driving force transmission assembly 12 and the second driving force transmission assembly 3 only by arranging one driving force output member through the recessed portion 13, thereby ensuring that the developing roller 21 and the photosensitive drum 11 can be rotated in synchronization while simplifying the structure in the laser printer.
Alternatively, it may be arranged that the first driving force transmission member 12 extends further than the second driving force transmission member 3 with respect to the other side of the process cartridge 100 (the side opposite to the side where the driving force transmission member is provided), in which case a recess 13 accommodating the driving force output member is still formed between the first driving force transmission member 12 and the second driving force transmission member 3, but in which case the recess 13 is equivalent to being provided on the powder hopper 2; accordingly, the photosensitive drum 11 may be referred to as a first rotary member, the photosensitive member 11 and the first driving force transmission member 12 may be referred to as a first rotary member, the developing roller 21 may be referred to as a second rotary member, and the developing roller 21 and the second driving force transmission member 3 may be referred to as a second rotary member, and one of the first driving force transmission member 12 and the second driving force transmission member 3 extends further than the other in a lengthwise direction of the process cartridge 100, or, in an axial direction of the first rotary member 11 or the second rotary member 21, with respect to the other side (the side opposite to the side where the driving force transmission member is provided) of the process cartridge 100, and thus, the recess 13 is formed between the first driving force transmission member 12 and the second driving force transmission member 3.
The first drive force transmission member 12 is a substantially triangular post, and the structure of the second drive force transmission member 3 will be described with an emphasis on the following.
Fig. 2 and 3 are schematic structural views of a driving force transmission assembly according to an embodiment of the present invention.
The second driving force transmission assembly 3 includes a driving member 32 and a driven member 31 coupled to each other, the driving member 32 being configured to be coupled to and receive a driving force from a driving force output member, and the driven member 31 being coupled to the developing roller 20 to drive the developing roller 20 to rotate about the rotation axis L in a direction indicated by r.
The follower 31 is connected with the end of the developing roller 20, the driving force receiving portion 33 is arranged on the follower 31, preferably, the follower 31 is a cylinder, the driving force receiving portion 33 is a plane arranged on the circumferential surface of the follower 31, and the plane can be formed by cutting on the follower 31 or extruding the follower 31; the driving member 32 is a hollow cylinder having teeth on an outer circumferential surface of the cylinder and a driving force transfer part 34 on an inner circumferential surface of the cylinder, and specifically, the driving force transfer part 34 is a protrusion protruding radially inward from the inner circumferential surface of the cylinder.
Preferably, two driving force receiving portions 33 are disposed on the driven member 31 in a radially opposite manner, and correspondingly, two driving force transmitting portions 34 are disposed on the inner circumferential surface of the driving member 32 in a radially opposite manner, and each driving force receiving portion 33 has the same structure, and each driving force transmitting portion 34 has the same structure, so that only one driving force receiving portion 33 and its corresponding driving force transmitting portion 34 will be described hereinafter.
FIG. 4 is a side view of the follower of the driving force transmission assembly as viewed along the axis of the developer roller in accordance with the first embodiment of the present invention; FIG. 5 is a side view of the driving member of the driving force transmission assembly as viewed along the axis of the developer roller in the first embodiment of the present invention; fig. 6 is a cross-sectional view of the driving member of the driving force transmission assembly engaging with the driven member, as viewed along the axis of the developing roller, in accordance with the first embodiment of the present invention.
As shown in fig. 4 and 5, the driving force receiving portion 33 is a whole plane parallel to the rotation axis L, the driving force transmitting portion 34 includes a driving force transmitting surface 341 and a supporting surface 342, the driving force transmitting surface 341 is configured to be combined with the plane 33, the supporting surface 342 is configured to support the driving force transmitting portion 34, and the shortest distance between the two driving force transmitting portions 34 is smaller than the diameter of the driven member 31, so that the driving force transmitting portions 34 are only combined with the plane 33 and do not reach the outside of the area of the plane 33, and the driving force of the driving member 32 can be stably transmitted to the driven member 31.
Before the process cartridge 100 is mounted to the laser printer, the driving member 32 is in a free-running state in which the driving member 32 is rotatable relative to the developing roller 20, and during mounting of the process cartridge 100 to the laser printer, even if the teeth of the outer surface of the driving member 32 and the teeth of the driving force output member are in a misaligned state, the driving member 32 is touched by the driving force output member to rotate until the driving member 32 is completely engaged with the driving force output member as the process cartridge 100 is mounted.
As shown in fig. 6, when the driving member 32 is driven, the driving force is transmitted to the plane 33 through the driving force transmission surface 341, at this time, the driving force transmission portion 34 and the driving force receiving portion 33 are in surface-to-surface contact, and further, the developing roller 20 is driven by the driven member 31, and the developing roller 20 rotates in the direction indicated by r together with the second driving force transmission member 3 around the rotation axis L; when the process cartridge 100 is taken out of the laser printer, the driving member 32 is returned to the free-run state again.
As can be seen from the above, the driving force transmitting surface 341 does not engage with the flat surface 33 before the process cartridge 100 is mounted to the laser printer, which is advantageous for ensuring that the driving force output member engages with the driving member 32; at this time, if the driving force transmission surface 341 is located at the position farthest from the plane 33, which is more advantageous for the engagement of the driving force output member with the driving member 32, it is achievable that a reset member for forcing the driving force transmission surface 341 to the position farthest from the plane 33 may be provided between the driven member 31 and the driving member 32, for example, a member such as a compression spring, an elastic rubber, an elastic steel sheet, or the like may be provided between the driven member 31 and the driving member 32 as the reset member, or the above-mentioned reset member may be provided between the driving force transmission surface 341 and the plane 33.
[ example two ]
Fig. 7 is a side view of the follower in the driving force transmission assembly as viewed along the axis of the developing roller in the second embodiment of the present invention.
In this embodiment, the driving force receiving portion 33a is configured to be non-planar, as shown in fig. 7, the driving force receiving portion 33a is a V-shaped structure having two intersecting planes, and accordingly, the driving member 32 is provided with a driving force transmitting surface capable of being combined with one of the planes, when the driving force transmitting surface transmits the driving force to the one of the planes of the driving force receiving portion 33a, so that the driven member 31 rotates around the rotation axis L in the direction indicated by r, a force for pulling back the driving force transmitting surface is generated between the driving force transmitting surface and the driving force receiving portion 33a, and the force can prevent the driving force transmitting surface from being separated from the driving force receiving portion 33 a.
Alternatively, the driving force receiving portion 33a may have an arc-shaped configuration having a curved surface, and may also function to couple with the driving force transmitting surface and transmit the driving force to the developing roller 20.
According to the above technical idea, the position where the driving force transmitting surface 341 (protrusion 34) is farthest from the plane or the arc surface by the reset member generally means the position where the driving force transmitting surface 341 (protrusion 34) is farthest from the contact between the driving force receiving portion 33 and the driving force transmitting portion 34.
[ third example ]
Fig. 8 is a side view of the driving member of the driving force transmission assembly as viewed along the axis of the developing roller in the third embodiment of the present invention.
In the present embodiment, the driving force transmitting portion 34a of the driving member 32 is provided as a sphere protruding radially inward from the inner circumferential surface of the cylinder, or the driving force transmitting portion 34a is provided as a cylinder extending along the rotation axis L, and the driving force transmitting portion 34a of the present embodiment has a simpler structure than the driving force transmitting portion 34 of the first embodiment, which is advantageous for reducing the complexity of the mold of the driving member 32.
Alternatively, the projection 34 as the driving force transmitting portion and the flat 33/arc 33a as the driving force receiving portion may also be interchanged, i.e., the projection 34 is provided on the driven member 31, the flat 33/arc 33a is provided on the driving member 32, and when two diametrically opposite projections 34 are provided in the driven member 31 and two diametrically opposite flat 33/arc 33a are provided in the driving member 32, the maximum distance between the two projections 34 is smaller than the inner circle diameter of the driving member 32.
The above-described embodiment in which the driven member 31 is accommodated by the driving member 32, and conversely, the above-described structure is also applicable when the driving member 32 is accommodated by the driven member 31.
[ advantageous effects ]
The second driving force transmission assembly 3 is configured such that the driving member 32 is movable relative to the developing roller 20 before the process cartridge 100 is mounted to the laser printer, and in particular, the driving member 32 is rotatable relative to the developing roller 20, and when the process cartridge 100 is mounted to the laser printer, the driving member 32 is rotatable about the rotational axis until the driving member 32 engages with the driving force output member even if the teeth of the driving member 32 are in a position where they cannot be well engaged with the driving force output member.
The second driving force transmission component 3 is provided with at least one plane or cambered surface for receiving the driving force on the driven part 31, and at least one protrusion 34/34a combined with the plane or the cambered surface on the driving part 32, the driven part 31 is directly combined with the developing roller 20, and the protrusion is combined with the plane or the cambered surface to transmit the driving force, so that the number of parts of the second driving force transmission component 3 is reduced, the structure is greatly simplified, only the driving part 32 needs to be installed on the driven part 31, and the driven part 31 can be directly formed on a steel shaft of the developing roller 20, thereby reducing the cost of the second driving force transmission component 3.
When two diametrically opposite protrusions 34 are provided in the driving member 32, the shortest distance between the two protrusions 34 is smaller than the outer diameter of the driven member 31, and at this time, the protrusions 34 and the corresponding flat or curved surfaces thereof form identification portions, and the second driving force transmission member 3 is correctly assembled only when the protrusions 34 are opposed to the flat or curved surfaces, and thus, the protrusions 34 and the corresponding flat or curved surfaces thereof also have an effect of preventing an assembly error of the second driving force transmission member 3.
Claims (10)
1. A driving force transmission assembly for transmitting a driving force to the rotating member, the driving force transmission assembly including a driving member for receiving the driving force from the outside and a driven member coupled to the rotating member for transmitting the driving force to the rotating member, the driving force transmission assembly including a driving member for receiving the driving force from the outside and a driven member coupled to the rotating member,
the driven part and the driving part are both cylinders, one of the driven part and the driving part is provided with a plane or a cambered surface for receiving driving force, and the other one of the driven part and the driving part is provided with a protrusion for combining with the plane or the cambered surface;
before the driving part receives the driving force, the driving part can move relative to the driven part;
when the driving member receives the driving force, the protrusion is combined with the flat surface or the arc surface.
2. A drive power transmitting assembly according to claim 1, further comprising a reset member between the driving member and the driven member for forcing the protrusion to a position furthest from the plane or curved surface before the driving member receives the drive power.
3. The drive power transmitting assembly according to claim 2, wherein the protrusion includes a drive power transmitting surface for engaging with the flat surface or the curved surface, and a support surface for supporting the drive power transmitting portion.
4. The drive power transmitting assembly according to claim 2, wherein the protrusion is a cylindrical body extending along the rotational axis of the rotary member.
5. The drive power transmitting assembly according to claim 2, wherein the protrusion is a sphere.
6. A drive power transmitting assembly according to any one of claims 1 to 5, wherein the drive power transmitting assembly is provided with two diametrically opposed protrusions, and two diametrically opposed flat or curved faces corresponding to the protrusions.
7. A rotary assembly comprising a rotary member and a drive force transfer assembly as claimed in any one of claims 1 to 6, the drive force transfer assembly being provided at one end of the rotary member.
8. A process cartridge, comprising a housing and a rotation member according to claim 7, the rotation member being rotatably provided in the housing.
9. A process cartridge detachably mountable to a laser printer provided with a driving force output member, wherein the process cartridge comprises a powder hopper casing and a waste powder hopper casing which are combined with each other, and a second rotating assembly in the powder hopper casing and a first rotating assembly in the waste powder hopper casing, the first rotating assembly comprising a first rotating member and a first driving force transmitting assembly which are combined with each other, the second rotating assembly comprising a second rotating member and a driving force transmitting assembly as claimed in any one of claims 1 to 6 which are combined with each other, the first driving force transmitting assembly being different from the driving force transmitting assembly;
when the process cartridge is mounted to the laser printer, the first driving force transmission assembly and the driving force transmission assembly are simultaneously combined with the driving force output member.
10. A process cartridge according to claim 9, wherein a recess for accommodating the driving force output member is formed between the driving force transmission member and the first driving force transmission member in a longitudinal direction of the process cartridge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122471844.2U CN216118398U (en) | 2021-10-13 | 2021-10-13 | Driving force transmission assembly, rotating assembly and processing box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122471844.2U CN216118398U (en) | 2021-10-13 | 2021-10-13 | Driving force transmission assembly, rotating assembly and processing box |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216118398U true CN216118398U (en) | 2022-03-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122471844.2U Active CN216118398U (en) | 2021-10-13 | 2021-10-13 | Driving force transmission assembly, rotating assembly and processing box |
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| Country | Link |
|---|---|
| CN (1) | CN216118398U (en) |
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2021
- 2021-10-13 CN CN202122471844.2U patent/CN216118398U/en active Active
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