CN110941168A - Driving force transmission mechanism and processing box - Google Patents
Driving force transmission mechanism and processing box Download PDFInfo
- Publication number
- CN110941168A CN110941168A CN201811448334.XA CN201811448334A CN110941168A CN 110941168 A CN110941168 A CN 110941168A CN 201811448334 A CN201811448334 A CN 201811448334A CN 110941168 A CN110941168 A CN 110941168A
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- Prior art keywords
- power receiving
- drive shaft
- process cartridge
- receiving portion
- cylindrical portion
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G21/00—Arrangements not provided for by groups G03G13/00 - G03G19/00, e.g. cleaning, elimination of residual charge
- G03G21/16—Mechanical means for facilitating the maintenance of the apparatus, e.g. modular arrangements
- G03G21/18—Mechanical means for facilitating the maintenance of the apparatus, e.g. modular arrangements using a processing cartridge, whereby the process cartridge comprises at least two image processing means in a single unit
- G03G21/1839—Means for handling the process cartridge in the apparatus body
- G03G21/1857—Means for handling the process cartridge in the apparatus body for transmitting mechanical drive power to the process cartridge, drive mechanisms, gears, couplings, braking mechanisms
- G03G21/186—Axial couplings
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G21/00—Arrangements not provided for by groups G03G13/00 - G03G19/00, e.g. cleaning, elimination of residual charge
- G03G21/16—Mechanical means for facilitating the maintenance of the apparatus, e.g. modular arrangements
- G03G21/18—Mechanical means for facilitating the maintenance of the apparatus, e.g. modular arrangements using a processing cartridge, whereby the process cartridge comprises at least two image processing means in a single unit
- G03G21/1839—Means for handling the process cartridge in the apparatus body
- G03G21/1857—Means for handling the process cartridge in the apparatus body for transmitting mechanical drive power to the process cartridge, drive mechanisms, gears, couplings, braking mechanisms
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- Engineering & Computer Science (AREA)
- Computer Vision & Pattern Recognition (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Electrophotography Configuration And Component (AREA)
Abstract
The invention discloses a driving force transmission mechanism capable of engaging with a driving shaft having a concave part in an image forming apparatus, comprising: the coupling member is provided with a cylindrical part, a power receiving part and a limiting part, the power receiving part extends from the inner wall of the cylindrical part towards the radial inner part, the power receiving part can be meshed with the concave part of the driving shaft, the power receiving part receives driving force transmitted from the driving shaft to drive the coupling member to rotate around the axis of the power receiving part, the power receiving part is configured into at least one protruding part protruding towards the radial inner side of the cylindrical part, the protruding part is immovable relative to the cylindrical part in the radial direction of the cylindrical part, and the limiting part can move relative to the cylindrical part in the radial direction of the cylindrical part. The technical problem that when a driving shaft of an image forming device in the prior art transmits driving force to a power receiving part of a processing box, a supporting part of the power receiving part is extruded and deformed by the driving shaft or is directly damaged, so that the driving force cannot be transmitted is solved.
Description
Technical Field
The present invention relates to a driving force transmission mechanism used in an image forming apparatus and a process cartridge including the driving force transmission mechanism.
Background
The process cartridge is a cartridge detachably mountable to a main body of the image forming apparatus, and the cartridge includes, as an integral unit, an electrophotographic photosensitive member and at least one of processors such as a charger, a developer, a cleaner, and the like. Since the process cartridge is detachably mounted with respect to the image forming apparatus main body, maintenance of the apparatus is facilitated. An electronic image forming apparatus employing an electrophotographic image forming method is operated as follows: the charger is uniformly charged by light of the image forming apparatus, selective exposure is performed on the electrophotographic photosensitive member to form an electrostatic latent image, the latent image is developed with toner by a developer to form a toner image, and the formed toner image is transferred onto a recording medium by a transfer device to form an image on the recording material.
Generally, a photosensitive assembly of the process cartridge is provided with a power receiving device, which is engaged with a machine driving device in the image forming apparatus to drive the photosensitive assembly to rotate so as to drive the entire process cartridge to operate. However, the photosensitive member needs to be detachably mounted in the image forming apparatus along with the process cartridge, and therefore, when the process cartridge is removed from the image forming apparatus, the power receiving means is required to be disengaged from the machine driving means to ensure that the process cartridge is smoothly removed from the image forming apparatus; when the processing box is installed in the image forming device for printing operation, the power receiving device is required to be meshed with the machine driving device, and the photosensitive assembly is ensured to smoothly receive driving force.
Chinese patent No. CN207601523U discloses a process cartridge detachably mountable to an image forming apparatus. The image forming apparatus has a drive shaft, and a front end of the drive shaft is provided on a circumferential surface thereof with recesses arranged at equal intervals in a circumferential direction of the drive shaft, the recesses extending along an axis of the drive shaft and an upper end of the front end of the drive shaft being closed. The processing box is provided with a driving force transmission mechanism, the driving force transmission mechanism comprises a power receiving part which can be meshed with the driving shaft to receive driving force and a flange part which receives the driving force transmitted by the power receiving part and drives the photosensitive assembly to rotate, and the power receiving part is provided with a pressing end and a power receiving end. When the processing box is installed in the image forming device, the front end of the driving shaft presses the pressing end of the power receiving part, and the pressing end and the power receiving end of the power receiving part are integrated, so that the pressing end drives the power receiving end to turn over to be meshed with the concave part of the driving shaft, and the power receiving part can receive the driving force transmitted by the driving shaft and drive the driving assembly to rotate through the flange part. However, when the pressing end of the power receiving portion is pressed by the front end of the driving shaft to turn over the power receiving end, the power receiving end may abut against the circumferential surface of the driving shaft and may not directly engage with the concave portion of the driving shaft, so that the power receiving end is crushed by the driving shaft or directly damaged, resulting in a situation where the driving force cannot be transmitted.
Disclosure of Invention
In order to solve the technical problem that when a driving shaft of the image forming device in the prior art transmits driving force to a power receiving part of a processing box, the power receiving part is extruded and deformed by the driving shaft or is directly damaged to cause that the driving force cannot be transmitted, the invention is realized by the following technical scheme:
a process cartridge detachably mountable to an image forming apparatus including a drive shaft provided with a recess, the drive shaft having a closed front end, the process cartridge comprising:
a shell body, a plurality of first connecting rods and a plurality of second connecting rods,
a coupling member disposed at one side end of the housing,
the coupling member includes a cylindrical portion and a power receiving portion configured to enter the recess portion and receive a rotational driving force from the drive shaft,
the coupling member further includes a support portion supporting the power receiving portion and a stopper portion elastically contactable with the drive shaft, the support portion supporting the power receiving portion inelastically, the power receiving portion being configured as at least one protruding portion protruding radially inward of the cylindrical portion, the power receiving portion being immovable in a radial direction of the cylindrical portion with respect to the cylindrical portion, and the stopper portion being movable in the radial direction of the cylindrical portion with respect to the cylindrical portion.
Further, the cylindrical portion is provided with a support portion that supports the power receiving portion, the support portion is configured to fixedly support the power receiving portion, and an arc length of the support portion extending in the circumferential direction of the cylindrical portion is larger than an arc length of the power receiving portion extending in the circumferential direction of the cylindrical portion.
Further, the number of the limiting portions is at least two, and at least two limiting portions are arranged asymmetrically in the circumferential direction of the cylindrical portion.
Further, an elastic member is provided between the stopper portion and the cylindrical portion.
Further, at least a part of the stopper portion is provided inside the cylindrical portion.
Further, the stopper portion is provided such that a force received from the drive shaft during engagement of the coupling member with the drive shaft forces the stopper portion to move radially outward of the cylindrical portion.
Further, the power receiving portion is integrally formed with the cylindrical portion.
Further, the power receiving portion may urge the drive shaft to move inside the cylindrical portion such that the axis of the drive shaft is inclined with respect to the axis of the cylindrical portion.
Further, the power receiving portion may be configured to receive power from the power receiving portion when the drive shaft enters the inside of the cylindrical portion and the axis of the drive shaft is inclined with respect to the axis of the cylindrical portion.
Further, still include the sensitization drum, the coupling member is fixed in an axial side end of sensitization drum, at least a part setting of spacing portion is in the inside of sensitization drum.
Compared with the prior art, the present invention provides a process cartridge with a new driving force transmission mechanism. The power receiving part of the driving force transmission mechanism has high strength and stable structure, is not easy to be extruded by the driving shaft to deform, and has stable power transmission. The technical problem that when a driving shaft of an image forming device in the prior art transmits driving force to a power receiving part of a processing box, a supporting part of the power receiving part is extruded and deformed by the driving shaft or is directly damaged, so that the driving force cannot be transmitted is solved.
Description of the drawings:
FIG. 1 is a schematic view showing the construction of a process cartridge according to a first embodiment of the present invention;
FIG. 2 is a schematic view showing a configuration of a driving shaft of an image forming apparatus in the related art;
FIG. 3 is an exploded schematic view of a driving force transmission mechanism of the process cartridge in the first embodiment of the present invention;
fig. 4 is a schematic view of a coupling member of the driving force transmission mechanism in the first embodiment of the invention;
FIG. 5 is a schematic view showing the installation of the position-restricting portion of the coupling member according to the first embodiment of the present invention;
fig. 6 is a schematic view showing a first state of the driving force transmission mechanism and the drive shaft in the first embodiment of the invention;
fig. 7 is a schematic view of a second state of the driving force transmission mechanism and the drive shaft in the first embodiment of the invention;
fig. 8 is a schematic view of the driving force transmission mechanism disengaged from the drive shaft in the first embodiment of the invention;
fig. 9 is a schematic view of a driving force transmission mechanism in a second embodiment of the invention;
fig. 10 is a partially exploded sectional view of a driving force transmission mechanism in a second embodiment of the invention;
fig. 11 is a schematic mounting diagram of a magnetic member of the driving force transmission mechanism in the second embodiment of the invention;
fig. 12 is a schematic view of a driving force transmission mechanism and a drive shaft in a first state in a second embodiment of the invention;
fig. 13 is a second state diagram of the driving force transmission mechanism and the drive shaft in the second embodiment of the invention;
fig. 14 is a sectional view of a driving force transmission mechanism in a third embodiment of the invention;
fig. 15 is a schematic view of a driving force transmission mechanism and a drive shaft in a first state in a third embodiment of the invention;
fig. 16 is a schematic view of a second state of the driving force transmission mechanism and the drive shaft in the third embodiment of the invention;
fig. 17 is a third state diagram of the driving force transmission mechanism and the drive shaft in the third embodiment of the invention.
The specific implementation mode is as follows:
in order to make the object, technical scheme and technical effect of the embodiment of the present invention clearer, the technical scheme of the developing cartridge of the present invention will be clearly and completely described below with reference to the accompanying drawings. It should be apparent that the described embodiment is only one preferred embodiment of the present invention, not all embodiments, and other embodiments obtained by those skilled in the art without inventive efforts based on the embodiments of the present invention belong to the protection scope of the present invention.
First embodiment
Fig. 1 is a schematic view showing a structure of a process cartridge 1 according to an embodiment of the present invention. The process cartridge 1 includes: a casing 2 in which developer is stored; a photosensitive drum 4 rotatably supported on the housing 2; and the driving force transmission mechanism 3 is arranged at one longitudinal end of the photosensitive drum 4 and is used for receiving the driving force transmitted by the image forming device and driving the photosensitive drum 4 to rotate.
As shown in fig. 2, a schematic diagram of a driving shaft 100 of an image forming apparatus in the related art is shown. The drive shaft 100 is substantially cylindrical, and three recesses 100b (only one is shown) are provided on the circumferential surface of the drive shaft 100 in uniform distribution. One end of the driving shaft 100 is connected to the elastic member 101, and the driving shaft 100 can extend in the direction of a1 or retract in the direction of a2 along the axial direction under the elastic force of the elastic member 101. The drive shaft 100 has a certain clearance h from the image forming apparatus frame in the direction perpendicular to the axial direction, and when the drive shaft 100 is subjected to an external force in the direction perpendicular to the axial direction, the drive shaft 100 may be inclined from the axial direction in the A3 or a4 direction. When the process cartridge 1 is mounted in the image forming apparatus in a direction substantially parallel to the axis of the photosensitive drum, the driving shaft 100 is engaged with a driving force transmission mechanism 3 (see fig. 1) to rotate the photosensitive drum, and a specific engaging process will be described in detail later.
As shown in fig. 3 to 5, the driving force transmission mechanism 3 in the present embodiment includes a coupling member 5 and a positioning member 6. The coupling member 5 is cylindrical and is engageable with a drive shaft 100 in the image forming apparatus to receive and transmit a driving force to the photosensitive drum 4, and the coupling member 5 is substantially coaxial with the photosensitive drum 4. The coupling member 5 includes a cylindrical portion 7, a power receiving portion 11a, a support portion 11b, and a stopper portion 12. The cylindrical portion 7 is a hollow cylindrical body having a first end 9 and a second end 10 in the direction of the axis X; the outer circumferential surface of the first end 9 is insertable into the drum inner wall of the photosensitive drum 4, the coupling member 5 is attached to the photosensitive drum 4 by interference fit, and in order to prevent the coupling member 5 from falling off from the photosensitive drum 4 in general, an appropriate amount of adhesive may be coated on the outer circumferential surface of the first end 9, so that the coupling member 5 is more compactly fitted with the cylindrical inner wall of the photosensitive drum 4; the second end 10 is the portion of the coupling member 5 that extends out of the drum of the photoreceptor drum 4. The support portion 11b is configured as a support plate projecting from the inner wall of the cylindrical portion 7 in the radial direction toward the axis X, the power receiving portion 11a is a hook-shaped portion projecting from the support portion 11b toward the axis X, and both the power receiving portion 11a and the support portion 11b are made of a rigid material, are integrally formed with the cylindrical portion 7, and are immovable relative to the cylindrical portion 7. The stopper portion 12 is detachably mounted in the cylindrical portion 7, specifically, a protruding portion 15 protruding from the inner wall of the cylinder toward the axis X is provided in the cylindrical portion 7, the protruding portion 15 is integrally formed with the cylindrical portion 7, an opening 16 is formed between the protruding portion 15 and the support portion 11b, the stopper portion 12 is mountable in the opening 16, and the stopper portion 12 is specifically configured in two, and is asymmetrically provided on the cylindrical portion 7 with respect to the circumferential direction; the stopper portion 12 is formed with an attachment hole 12a, a first stopper portion 12b, a second stopper portion 12c, and an abutment portion 12d, the elastic member 14 is attached to the attachment hole 12a, and when the stopper portion 12 is attached to the opening 16, one end of the elastic member 14 abuts on the inner wall of the cylindrical portion 7 and the other end abuts on the attachment hole 12a, and therefore, the stopper portion 12 is movable in the radial direction by the elastic member 14; in order to limit the amount of movement of the stopper portion 12 in the radial direction, the protrusion portion 15 is provided with a first protruding portion 15a at one end where the opening 16 is formed, the support portion 11b is provided with a second protruding portion 11b1 at one end where the opening 16 is formed, a space is formed in the radial direction between the first protruding portion 15a and the second protruding portion 11b1, and the first stopper portion 12b and the second stopper portion 12c can only move in the space to limit the amount of movement of the stopper portion 12 in the radial direction.
The positioning member 6 is configured in a substantially boss shape, is mountable to the first end 9 of the coupling member 5, is connected with the first end 9 of the coupling member 5 by means of an adhesive or a snap fit or the like and is stably mounted within the cylindrical inner wall of the first end 9, and closes the axial end of the first end 9 of the coupling member 5. In the present embodiment, the positioning member 6 is directly snap-fitted on the axial end of the first end 9 by interference fit, so that the positioning member 6 is mounted on the coupling member 5. Wherein the positioning member 6 is formed with a positioning groove 8, the following explains, in conjunction with fig. 1, that the positioning member 6 restricts the movement of the image forming apparatus drive shaft 100 in the axial direction. The front end 100a of the drive shaft 100 of the image forming apparatus is conical, the positioning recess 8 of the positioning member 6 receives and accommodates the front end 100a of the drive shaft 100, and since the positioning member 6 is fixed in the process cartridge and thus does not move, the drive shaft 100 tends to move toward the side of the positioning member 6 by the elastic member 101 during transmission of the driving force, but since the front end 100a of the drive shaft 100 abuts against the positioning recess 8, the positioning recess 8 restricts the movement of the drive shaft 100 in the axial direction. The driving force transmission mechanism 3 in the present embodiment is provided with the positioning member 6 for more stable driving force transmission, and alternatively, the positioning member 6 may be omitted.
How the driving force transmission mechanism 3 is engaged with and disengaged from the driving shaft 100 of the image forming apparatus in the present embodiment will be described with reference to the drawings.
When the process cartridge 1 is mounted in the image forming apparatus in a direction substantially parallel to the axis X, the front end 100a of the drive shaft 100 abuts against the power receiving portion 11a of the drive force transmission mechanism 3, and at this time, as shown in fig. 6, the power receiving portion 11a applies a force in the radial direction to the drive shaft 100, forcing the drive shaft 100 to shift in the radial direction, the axial center position of the drive shaft 100 to shift from a1 to a2, and the stopper portion 12 is pressed by the drive shaft 100 to move away from the axial center a1 in the radial direction. When the drive shaft 100 is driven to rotate in the N direction by the motor in the image forming apparatus, since the stopper portion 100 may partially enter the recess 100b of the drive shaft 100, the stopper portion 100 is further pressed by the drive shaft 100 to move away from the axial center a1 in the radial direction, and the power receiving portion 11a abuts against the circumferential surface of the drive shaft 100. As the drive shaft 100 is further rotated in the direction N, the drive shaft 100 is rotated until the recess 100b thereof is opposed to the power receiving portion 11a, and the stopper portion 12 presses the drive shaft 100 and moves closer to the axial center a1 in the radial direction under the elastic potential energy accumulated in the elastic member 14, forcing the recess 100b of the drive shaft 100 to engage with the power receiving portion 11 a. As the drive shaft 100 is rotated still further in the N direction, as shown in fig. 7, the power receiving portion 11a abuts on one surface of the recessed portion 100b, the drive shaft 100 transmits the driving force to the power receiving portion 11a through the abutting of the recessed portion 100b and the power receiving portion 11a, and the power receiving portion 11a rotates the photosensitive drum in the N direction. At this time, the stopper portion 12 is always kept in contact with the circumferential surface of the drive shaft 100 by the elastic force of the elastic member 14, and therefore, the drive shaft 100 does not cause the recess portion 100b to disengage from the power receiving portion 11a due to its own centrifugal force when rotating, thereby affecting the transmission of the drive force; further, the minimum arc length of the stopper portion 12 is defined to be larger than the maximum arc length of the opening of the recess portion 100b as measured in the circumferential direction of the cylindrical portion 7, and therefore, the stopper portion 12 is always spaced from the recess portion 100b during rotation of the drive shaft 100.
When the process cartridge 1 is removed from the image forming apparatus in a direction substantially parallel to the axis X, the power receiving portion 11a of the driving force transmission mechanism 3 interferes with a portion of the recess 100b of the drive shaft 100 near the front end 100 a. At this time, as shown in fig. 8, when the external force continues to act on the process cartridge 1 to cause the power receiving portion 11a to press the recess 100b of the drive shaft 100, since the contact portion between the power receiving portion 11a and the recess 100b of the drive shaft 100 is a slope-inclined surface, the power receiving portion 11a applies a component force in the radial direction to the drive shaft 100, the drive shaft 100 is radially displaced by the radial force applied by the power receiving portion 11a, the axial position of the drive shaft 100 is displaced from a1 to A3, and the stopper portion 12 is radially displaced away from the axial center a1 by being pressed by the drive shaft in accordance with the displacement of the drive shaft 100. As described above, the power receiving portion 11a is disengaged from the recess 100b of the drive shaft 100 during the radial displacement of the drive shaft 100, the drive shaft 100 no longer interferes with the driving force transmission mechanism 3, and the process cartridge 1 can be smoothly taken out of the image forming apparatus.
Second embodiment
In this embodiment, the same structure as that in the first embodiment will not be described again, and only the technical features different from those in the first embodiment will be briefly described. As shown in fig. 9 to 11, the driving force transmission mechanism 20 of the present embodiment includes a cylindrical portion 21, a coupling member 22, and a positioning member 23, and the driving force transmission mechanism 20 is rotatable about an axis X. The coupling member 22 includes a power receiving portion 24 and a support portion 25, and the power receiving portion 24 is movably mounted in the support portion 25. Wherein the support portion 25 includes a groove portion 25a and a protrusion portion 25b, the groove portion 25a is an open groove formed on the circumferential outer wall of the cylinder portion 21, and the opening thereof is directed radially outward of the cylinder portion 21; the protrusion 25b is formed on the inner circumferential wall of the cylindrical portion 21 and protrudes radially toward the axial center a1, the protrusion 25b is integrally formed with the groove 25a, and the protrusion 25b is formed with a first opening 25C that communicates with the groove 25 a. The power receiving portion 24 includes a protruding portion 24a and a restricting portion 24b, and when the power receiving portion 24 is mounted into the support portion 25, the protruding portion 24a passes through the groove portion 25a, the first opening 25c in order in the radial direction, and moves toward the axis a1 until the restricting portion 24b abuts on a side surface of the protruding portion 25b facing the groove portion 25a, i.e., indicating that the power receiving portion 24 has been mounted into the support portion 25, and the restricting portion 24b functions to restrict the protruding amount of the protruding portion 24a protruding out of the first opening 25c in this embodiment.
In the present embodiment, the coupling members 22 are specifically provided in three, and the power receiving portions 24 of the coupling members 22 are each made of a magnetic metal material. The magnetic member 26 is sleeved on the periphery of the extension portion 24a of the power receiving portion 24, specifically, the magnetic member 26 is provided with a second opening 26a, and the extension portion 24a of the power receiving portion 24 passes through the second opening 26a so that the magnetic member 26 abuts against the limiting portion 24b of the power receiving portion 24. When the power receiving portion 24 is mounted into the support portion 25, the magnetic member 26 is mounted into the groove portion 25a of the support portion 25 with the power receiving portion 24, and the magnetic member 26 is sandwiched between the regulating portion 24b of the power receiving portion 24 and the protruding portion 25b of the support portion 25. Since the magnetic member 26 has a magnetic force, the power receiving portion 24 made of a magnetic metal material is movable in the radial direction in the first opening 25c under the attraction of the magnetic member 26. Alternatively, the magnetic portion 26 may be provided on the protruding portion 24a of the power receiving portion 24 or the power receiving portion 24 may be provided directly magnetically, and the power receiving portion 24 may be moved in the radial direction in the first opening 25c by mutual attraction between the power receiving portions 24. Alternatively, magnetic members 26 may be provided in the power receiving portion 24 and the supporting portion 25, respectively, wherein the magnetic members 26 on the power receiving portion 24 and the magnetic members 26 in the supporting portion 25 have like poles opposite to each other, and the power receiving portion 24 is also movable in the radial direction in the first opening 25c by mutual repulsion between the magnetic members 26.
When the process cartridge is mounted in the image forming apparatus in a direction substantially parallel to the axis X, the front end 100a of the drive shaft 100 abuts the protruding portion 24a of the power receiving portion 24, and at this time, as shown in fig. 12, the drive shaft 100 applies a force in the radial direction to the power receiving portion 24, forcing the power receiving portion 24 to move in the support portion 25 in the radial direction away from the shaft center a1 until the front end 100a of the drive shaft 100 is accommodated in the positioning member 23. When the drive shaft 100 is driven to rotate in the N direction by the motor in the image forming apparatus, the circumferential surface of the drive shaft 100 further presses the power receiving portion 24, causing the power receiving portion 24 to continue moving away from the shaft center a1 in the radial direction. As the drive shaft 100 rotates until its upper recess 100b is opposed to the power receiving portion 24, as shown in fig. 13, since the power receiving portion 24 is attracted by the magnetic member 26, the power receiving portion 24 moves closer to the axis a1 in the radial direction to engage with the recess 100b of the drive shaft 100, the drive shaft 100 transmits the driving force to the power receiving portion 24 by abutting the recess 100b against the power receiving portion 24 and rotates, and the power receiving portion 24 further transmits the driving force to the driving force transmission mechanism 20 to rotate the photosensitive drum 4.
In this embodiment, when the process cartridge is attached and detached, the power receiving portions 24 are always in a mutually attracted state by the magnetic members 26, and therefore the power receiving portions 24 are not pressed by the drive shaft 100 to fall off from the support portions 25; further, the power receiving portion 24 is engaged with the first opening 25c of the support portion 25, and when the power receiving portion 24 is rotated by the driving shaft 100, the centrifugal force applied to the power receiving portion 24 by the driving shaft 100 does not force the power receiving portion 24 to be separated from the support portion 25.
Third embodiment
In this embodiment, the same structure as that in the first embodiment will not be described again, and only the technical features different from those in the first embodiment will be briefly described. As shown in fig. 14, the driving force transmission mechanism 30 of the present embodiment includes a cylindrical portion 31, a pressing portion 32, and a power receiving portion 33. The pressing portion 32 is movably provided in the cylindrical portion 31, and specifically, the pressing portion 32 moves axially along the axis X against the circumferential inner wall of the cylindrical portion 31. The power receiving portions 33 are specifically provided in three, and the power receiving portions 33 are specifically configured as triangular blocks in the present embodiment, including the tip end 33a and the flat surface portion 33 b. The circumferential inner walls of the cylindrical portions 31 are formed with three mounting grooves 31a, respectively, and the power receiving portions 33 are mounted in the mounting grooves 31a, respectively, by coupling pins 34 and are rotatable about the coupling pins 34.
As shown in fig. 15 to 17, when the process cartridge is mounted in the image forming apparatus in a direction substantially parallel to the axis X, the drive shaft 100 in the image forming apparatus is coupled to the drive force transmission mechanism 30. As the drive shaft 100 is inserted into the cylindrical portion 31, the protrusion 100c of the drive shaft 100 abuts against the pressing portion 32, and the pressing portion 32 is pressed to move along the axis X toward the power receiving portion 33. The tip end 100a of the driving shaft 100 abuts against the tip end 33a of the power receiving portion 33, and the power receiving portion 33 is forced to rotate around the connecting pin 55 so as to avoid the position interfering with the tip end 100a, that is, the power receiving portion 33 rotates until the flat portion 33b thereof faces the driving shaft 100, and it should be noted that when the original state of the power receiving portion 33 is the state where the flat portion 33b faces the driving shaft 100, the tip end 100a of the driving shaft 100 does not contact the power receiving portion 33. As the drive shaft 100 further extends into the cylindrical portion 31, the drive shaft 100 presses the pressing portion 32 to make the pressing portion 32 abut on the power receiving portion 33, and the power receiving portion 33 is forced to rotate around the connecting pin 34, and at this time, if the concave portion 100b of the drive shaft 100 is opposed to the power receiving portion 33, the power receiving portion 33 is pressed by the pressing portion 32 and rotates until the tip end 33a thereof engages with the concave portion 100b of the drive shaft 100, and when the drive shaft 100 is driven to rotate by the motor of the image forming apparatus, the drive force transmission mechanism 30 rotates by receiving the drive force from the drive shaft 100 through the power receiving portion 33; when the circumferential surface of the drive shaft 100 is opposed to the power receiving portion 33, the power receiving portion 33 is constantly pressed by the pressing portion 32, and when the drive shaft 100 is driven to rotate by the motor of the image forming apparatus, as the concave portion 100b of the drive shaft 100 rotates to be opposed to the power receiving portion 33, the power receiving portion 33 pressed by the pressing portion 32 rotates until the tip end 33a thereof engages with the concave portion 100b of the drive shaft 100, and the drive force transmission mechanism 30 rotates by the power receiving portion 33 receiving the drive force from the drive shaft 100.
Compared with the prior art, the present invention provides a process cartridge with a new driving force transmission mechanism. The power receiving part of the driving force transmission mechanism has high strength and stable structure, is not easy to be extruded by the driving shaft to deform, and has stable power transmission. The technical problem that when a driving shaft of an image forming device in the prior art transmits driving force to a power receiving part of a processing box, the power receiving part is extruded and deformed by the driving shaft or directly damaged, so that the driving force cannot be transmitted is solved.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A process cartridge detachably mountable to an image forming apparatus including a drive shaft provided with a recess, the drive shaft having a closed front end, the process cartridge comprising:
a shell body, a plurality of first connecting rods and a plurality of second connecting rods,
a coupling member disposed at one side end of the housing,
the coupling member includes a cylindrical portion and a power receiving portion configured to enter the recess portion and receive a rotational driving force from the drive shaft,
characterized in that the coupling member further comprises a support portion supporting the power receiving portion and a stopper portion elastically contactable with the drive shaft, the support portion supporting the power receiving portion inelastically, the power receiving portion being configured as at least one protruding portion protruding radially inward of the cylindrical portion, the power receiving portion being immovable in a radial direction of the cylindrical portion with respect to the cylindrical portion, and the stopper portion being movable in the radial direction of the cylindrical portion with respect to the cylindrical portion.
2. A process cartridge according to claim 1, wherein a support portion supporting said power receiving portion is provided on said cylindrical portion, said support portion is configured to fixedly support said power receiving portion, and an arc length of said support portion extending in a circumferential direction of said cylindrical portion is larger than an arc length of said power receiving portion extending in the circumferential direction of said cylindrical portion.
3. A process cartridge according to claim 1, wherein at least two of said position restricting portions are provided, at least two of said position restricting portions being provided so as to be arranged asymmetrically in a circumferential direction of said cylindrical portion.
4. A process cartridge according to claim 1, wherein an elastic member is provided between said stopper portion and said cylindrical portion.
5. A process cartridge according to claim 1, wherein at least a part of said stopper portion is provided inside said cylindrical portion.
6. A process cartridge according to claim 1, wherein said stopper portion is provided such that a force received from said drive shaft during engagement of said coupling member with said drive shaft forces said stopper portion to move radially outward of said cylindrical portion.
7. A process cartridge according to claim 1, wherein said power receiving portion is formed integrally with said cylindrical portion.
8. A process cartridge according to claim 1, wherein said power receiving portion urges said drive shaft to move inside said cylinder portion such that an axis of said drive shaft is inclined with respect to an axis of said cylinder portion.
9. A process cartridge according to claim 1, wherein when said drive shaft enters inside said cylinder part and an axis of said drive shaft is inclined with respect to an axis of said cylinder part, said stopper part urges said drive shaft to move so that said power receiving part enters said recess.
10. A process cartridge according to claim 1, further comprising a photosensitive drum, wherein said coupling member is fixed to an axial one-side end of said photosensitive drum, and at least a part of said stopper portion is provided inside said photosensitive drum.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821559464 | 2018-09-25 | ||
| CN2018215594646 | 2018-09-25 | ||
| CN2018215824794 | 2018-09-27 | ||
| CN201821582479 | 2018-09-27 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110941168A true CN110941168A (en) | 2020-03-31 |
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ID=66808046
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821990733.4U Active CN208999774U (en) | 2018-09-25 | 2018-11-30 | A kind of driving force transfer mechanism and handle box |
| CN201811448334.XA Pending CN110941168A (en) | 2018-09-25 | 2018-11-30 | Driving force transmission mechanism and processing box |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821990733.4U Active CN208999774U (en) | 2018-09-25 | 2018-11-30 | A kind of driving force transfer mechanism and handle box |
Country Status (1)
| Country | Link |
|---|---|
| CN (2) | CN208999774U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113064335A (en) * | 2021-03-09 | 2021-07-02 | 珠海联合天润打印耗材有限公司 | Drive assembly of box and box |
| CN113156790A (en) * | 2021-03-11 | 2021-07-23 | 珠海天威飞马打印耗材有限公司 | Driving force transmission assembly, rotating part, toner cartridge and electronic imaging equipment |
| WO2024046242A1 (en) * | 2022-08-27 | 2024-03-07 | 江西亿铂电子科技有限公司 | Processing box |
-
2018
- 2018-11-30 CN CN201821990733.4U patent/CN208999774U/en active Active
- 2018-11-30 CN CN201811448334.XA patent/CN110941168A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113064335A (en) * | 2021-03-09 | 2021-07-02 | 珠海联合天润打印耗材有限公司 | Drive assembly of box and box |
| CN113156790A (en) * | 2021-03-11 | 2021-07-23 | 珠海天威飞马打印耗材有限公司 | Driving force transmission assembly, rotating part, toner cartridge and electronic imaging equipment |
| WO2024046242A1 (en) * | 2022-08-27 | 2024-03-07 | 江西亿铂电子科技有限公司 | Processing box |
Also Published As
| Publication number | Publication date |
|---|---|
| CN208999774U (en) | 2019-06-18 |
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