CN105807596B - Processing box and rotary force transmission assembly and photosensitive drum thereof - Google Patents
Processing box and rotary force transmission assembly and photosensitive drum thereof Download PDFInfo
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- CN105807596B CN105807596B CN201610375183.4A CN201610375183A CN105807596B CN 105807596 B CN105807596 B CN 105807596B CN 201610375183 A CN201610375183 A CN 201610375183A CN 105807596 B CN105807596 B CN 105807596B
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- force receiving
- magnet
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- rotating force
- rotating
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G15/00—Apparatus for electrographic processes using a charge pattern
- G03G15/75—Details relating to xerographic drum, band or plate, e.g. replacing, testing
- G03G15/757—Drive mechanisms for photosensitive medium, e.g. gears
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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
- G03G21/1842—Means for handling the process cartridge in the apparatus body for guiding and mounting the process cartridge, positioning, alignment, locks
- G03G21/185—Means for handling the process cartridge in the apparatus body for guiding and mounting the process cartridge, positioning, alignment, locks the process cartridge being mounted parallel to the axis of the photosensitive member
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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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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Computer Vision & Pattern Recognition (AREA)
- Electrophotography Configuration And Component (AREA)
- Transmission Devices (AREA)
Abstract
The invention relates to a processing box, a rotating force transmission assembly and a photosensitive drum thereof, and belongs to the technical field of electrophotographic imaging printing. The processing box comprises a box body, a deviation mechanism and a photosensitive drum which can be rotatably supported between two end walls of the box body around a rotating axis. When the rotating force receiving teeth of the photosensitive drum are in a disconnection state, the deviation mechanism forces the rotating force transmission head to rotate to a position where an included angle is formed between a connecting line between the pair of rotating force receiving teeth and the insertion direction of the processing box to the host machine. By additionally arranging the deviation mechanism, the smoothness of the falling process of the processing box can be effectively improved.
Description
Technical Field
The present invention relates to a process cartridge detachably mountable to an electrophotographic image forming apparatus, a rotational force transmitting assembly thereof, and a photosensitive drum.
Background
An electrophotographic image forming apparatus, which is an apparatus for forming an image on a printing medium such as paper using the principle of electrophotography, includes a copying machine, a printer, a facsimile machine, and the like, and generally includes a main body and a process cartridge detachably mounted in the main body. The processing box is provided with a box body and a photosensitive drum which is rotatably supported between two end walls of the box body, and the photosensitive drum comprises a drum barrel and a rotating force transmission assembly which is arranged at one axial end of the drum barrel.
A torque transmission device, i.e., a rotational force transmitting assembly is disclosed in patent document No. CN 103376696A. As shown in fig. 1, the torque transmission device 01 includes a rotational force transmitting head 011, an axial stopper 012, a drum gear 013, an axial reset 014, and a pair of rotational force receiving teeth 015 provided on the rotational force transmitting head 011, and the rotational force transmitting head 011 and the rotational force receiving teeth 015 together constitute a rotational force receiving head.
As shown in fig. 1 and 2, the drum gear 013 is formed with an accommodating chamber 0131 opened at one axial end of the drum gear 013, and a guide hole 0133 communicating with the accommodating chamber 0131 is formed at the other axial end of the drum gear 013.
The rotating force transmission head 011 is composed of a guide rod 0112 and a rotating force receiving part 0111 which is arranged at one axial end of the guide rod 0112, and a pair of output arms 01121 which extend outwards along the transverse direction are arranged on the transverse outer wall of the guide rod 0112; on the outer end wall of the rotating force receiving part 0111 back to the guide rod 0112 along the axial direction of the guide rod 0112, a pair of the rotating force receiving teeth 015 formed by protruding outwards along the axial direction of the guide rod 0112 at the position of the outer end wall deviating from the center of the outer end wall along the guide rod 0112. On an inner wall of the housing chamber 0131 parallel to the axial direction of the drum gear 013, there are provided a pair of input arms 0132 extending toward the radial center thereof, and in the circumferential direction of the drum gear 013, the output arm 01121 is in abutting contact with the input arms 0132 at the position of the input arms 0132, so that the rotational force transmitting head 011 is rotatable about the central axis of the guide rod 0112 within a predetermined angular range with respect to the drum gear 013. The axial reset piece 014 is sleeved on the guide rod 0112, one end of the axial reset piece 014 abuts against one side of the output arm 01121 far away from the rotating force receiving part 0111, and the other end of the axial reset piece 014 abuts against the bottom surface of the accommodating cavity 0131, so that the rotating force transmission head 011 can reciprocate along the axial direction of the guide rod 0112.
When the process cartridge having the torque transmission device 01 is loaded into the main unit, if the connecting line between the pair of rotational force receiving teeth 015 is arranged in the direction indicated by the arrow in fig. 2, i.e., parallel to the insertion direction of the process cartridge into the main unit, and once the output arm 01121 abuts against the input arm 0132, the compression amount of the axial restoring member 014 needs to greatly exceed the height of the rotational force receiving teeth 015 to complete the coupling between the rotational force applying arm 021 and the rotational force receiving teeth 015, which results in that the whole coupling process is not easy, i.e., the dropping process of the process cartridge is not smooth enough.
A rotational driving force receiving head and a driving assembly, i.e., a rotational force receiving head and a rotational force transmitting assembly, are disclosed in patent document No. CN 201945803U. As shown in fig. 3, the rotational force transmitting assembly 03 includes an axial stopper 031, a drum gear 032, an axial restoring member 033, and a rotational force receiving head 08. The rotational force receiving head 08 is composed of a rotational force transmitting head 04, two tension springs 05, two pin shafts 06, and two rotational force receiving teeth 07. The coupling end of the rotating force receiving tooth 07 is provided with a coupling surface 071 matched with a rotating force output arm of a main machine driving shaft, the middle part of the rotating force receiving tooth is provided with a shaft hole 072 matched with the pin shaft 06, the reset end is provided with a hanging hole 073 matched with a hook of the tension spring 05, and the coupling end and the reset end are respectively positioned at two opposite sides of the shaft hole 072. The rotational force transmitting head 04 is composed of a guide rod 041 and a bracket 042, a mounting groove 0422 matched with the middle part of the rotational force receiving tooth 07 and a hanging hole matched with the other hook of the tension spring 05 are formed on the bracket 042, and shaft holes 0421 matched with the pin shaft 06 are formed on two sides of the mounting groove 0422. Through the cooperation of the pin shaft 06, the shaft hole 0421 and the shaft hole 072, the rotating force receiving tooth 07 can be rotatably hinged to the rotating force transmission head 04 around the pin shaft 06, namely can be rotated back and forth between a connection position connected with the main machine driving shaft and a disconnection position disconnected with the main machine driving shaft. One hook of the tension spring 05 is hooked to the hanging hole 073, and the other hook is hooked to a hanging hole provided on the bracket 042.
As shown in fig. 4, when the toner in the process cartridge is exhausted, the process cartridge is detached from the main unit, and if the process cartridge is pulled out from the main unit in the direction indicated by the arrow in the drawing, the rotational force receiving teeth 07 are rotated clockwise about the pin shaft 06 to the disengaged position against the elastic restoring force of the tension spring 05 due to the abutting action of the spherical end portion 022 of the drive shaft 02 so that the drive shaft 02 is disengaged from the rotational force receiving head 08, and when the two are completely disengaged, that is, the pair of rotational force receiving teeth 07 is in the disengaged state, the two tension springs 05 serve as the tooth restoring member, and the elastic restoring force thereof urges the rotational force receiving teeth 07 to be restored to the engaged position.
This rotational force transmitting assembly 03 can facilitate the decoupling of the rotational force receiving head 08 from the drive shaft 02, but when the insertion direction of the process cartridge constructed therewith into the main body is as indicated by the arrow in fig. 5, i.e., the line between the pair of rotational force receiving teeth 07 is arranged in the parallel insertion direction, there is a tendency for the rotational force receiving teeth 07 to be abutted to cause the coupling ends thereof to rotate inward, making the entire coupling process difficult to achieve, as shown in fig. 5.
Disclosure of Invention
The invention mainly aims to provide a processing box which can improve the smoothness of the falling process;
another object of the present invention is to provide a rotational force transmitting assembly for constructing the above-mentioned process cartridge;
it is still another object of the present invention to provide a photosensitive drum constructed with the above rotational force transmitting assembly.
In order to achieve the above-described main object, the present invention provides a process cartridge including a cartridge body, a biasing mechanism, and a photosensitive drum rotatably supported between both end walls of the cartridge body about a rotational axis. The photosensitive drum includes a drum and a rotational force transmitting assembly mounted at one axial end of the drum. The rotating force transmission assembly comprises a drum gear, an axial reset piece, a rotating force transmission head and a pair of rotating force receiving teeth; the rotational force transmitting head is provided with a force receiving section for receiving a force for urging the rotational force transmitting head to rotate relative to the drum gear about the rotational axis within a predetermined angular range. When a pair of rotating force receiving teeth are in a disconnection state, the deviation mechanism applies force to the force bearing section to force the rotating force transmission head to rotate to a position where an included angle is formed between a connecting line between the pair of rotating force receiving teeth and the insertion direction of the processing box to the host machine, namely the connecting line is not parallel to the insertion direction.
According to the scheme, the deviation mechanism forces the connecting line between the rotating force receiving teeth not to be parallel to the inserting direction of the processing box to the main machine, and the smoothness of the falling process of the processing box can be improved.
In a specific embodiment, when the pair of rotational force receiving teeth are in the decoupled state, the biasing mechanism urges the rotational force transmitting head to rotate with the rotational force receiving teeth biased from a first plane parallel to the insertion direction and in which the rotational axis is located. Further improving the smoothness of the falling process of the processing box.
More specifically, when the pair of rotational force receiving teeth are in the decoupled state, the biasing mechanism forces the rotational force transmitting head to rotate to the rotational force receiving teeth to be biased away from a sector having a rotational axis perpendicular to the sector and having an apex on a rotational axis whose bisector is arranged in parallel to the insertion direction. The smoothness of the falling process of the processing box is further improved.
The central angle of the sector is more than or equal to that of the rotating force receiving tooth. And the smoothness of the falling process of the processing box is further improved.
Another specific proposal is that the deviation mechanism forces the connecting line between a pair of rotating force receiving teeth to form an included angle which is more than or equal to 45 degrees with the insertion direction. Further improving the smoothness of the falling process of the processing box.
One preferred solution is that the deviation means comprise a first magnet, a second magnet and a third magnet arranged with their polar lines radially and coplanar along the drum. One of the stress section and the box body is fixed with a first magnet, and the other is fixed with a second magnet and a third magnet; the magnetic pole connecting lines of the second magnet and the third magnet are collinear. The deviation mechanism has simple structure, convenient assembly and low cost.
Another preferred scheme is that the rotating force transmission head comprises a guide rod and a rotating force receiving part positioned at one axial end of the guide rod, and the end part of the guide rod adjacent to the rotating force receiving part is a stressed section. The deviation mechanism comprises two elastic rods which are arranged in parallel, and the stress section is clamped between the two elastic rods; the cross section of the stress section is a rhombic surface or a first non-circular surface, the first non-circular surface is composed of a first circular surface, a first protruding surface and a second protruding surface, the first protruding surface and the second protruding surface are formed by protruding from the edge of the first circular surface along the radial direction, and the first protruding surface and the second protruding surface are symmetrically arranged around the center of the circle of the first circular surface; the size of the first projection surface is gradually reduced along the projection direction in a direction perpendicular to the radial direction; the dimension of the second projection surface gradually decreases in a direction perpendicular to the radial direction along the projection direction. The deviation mechanism has simple structure, convenient processing and low cost.
Still another preferred mode is that the rotational force receiving tooth is hinged to the rotational force transmitting head by a hinge shaft, and the axis of the hinge shaft and the rotational axis are perpendicular to each other and out of plane in space, that is, they are not coplanar and their direction vectors are orthogonal. The rotary force receiving tooth is reciprocatingly rotatable about the hinge shaft between a coupling position and a disengaging position. The rotating force transmission head is provided with a limiting part which limits the rotating force receiving teeth to turn from the coupling position to the position far away from the disengagement position; still include the tooth piece that resets, it is used for forcing revolving force receiving tooth to support and lean on spacing portion. It is convenient to detach the process cartridge from the main body.
In order to achieve the above another object, the present invention provides a rotational force transmitting assembly including a drum gear, an axial restoring member, an axial limiting member, a rotational force transmitting head, and a rotational force receiving tooth. The revolving force transmission head comprises a guide rod and a revolving force receiving part arranged at an axial end of the guide rod. The end of the guide bar adjacent to the rotational force receiving portion is a force receiving section for receiving a force for forcing the rotational force transmitting head to rotate in a predetermined angular range about the central axis of the guide bar with respect to the drum gear.
One specific scheme is that the stress section is fixed with a first magnet or a second magnet and a third magnet, and the magnetic pole connecting lines of the magnets are arranged along the radial direction of the guide rod. The magnetic pole connecting lines of the second magnet and the third magnet are collinear.
The other specific scheme is that the cross section of the stress section is a rhombic surface or a first non-circular surface, the first non-circular surface is composed of a first circular surface, a first protruding surface and a second protruding surface, the first protruding surface and the second protruding surface are formed by protruding from the edge of the first circular surface along the radial direction, and the first protruding surface and the second protruding surface are symmetrically arranged around the center of the circle of the first circular surface; the size of the first projection surface is gradually reduced along the projection direction in a direction perpendicular to the radial direction; the dimension of the second projection surface gradually decreases in a direction perpendicular to the radial direction along the projection direction.
In order to achieve the above-mentioned further object, the present invention provides a photosensitive drum including a drum and a rotational force transmitting assembly provided at an axial end of the drum. The rotational force transmitting assembly is the rotational force transmitting assembly described in any of the above technical solutions.
Drawings
FIG. 1 is a structural view of a conventional rotational force transmitting assembly;
FIG. 2 is an exploded structural view of the rotational force transmitting assembly shown in FIG. 1;
FIG. 3 is an exploded view of another prior art rotational force transmitting assembly;
FIG. 4 is a schematic view illustrating a decoupling manner between the rotational force transmitting assembly of FIG. 3 and the main body driving shaft;
FIG. 5 is a schematic view of a coupling between the rotational force transmitting assembly of FIG. 3 and a main drive shaft;
FIG. 6 is a perspective view of a first embodiment of the process cartridge of the present invention;
FIG. 7 is a perspective view of a rotational force transmitting assembly in the first embodiment of the process cartridge of the present invention;
FIG. 8 is an exploded perspective view of the rotational force transmitting assembly in the first embodiment of the process cartridge of the present invention;
FIG. 9 is an exploded perspective view of a rotational force receiving head in the first embodiment of the process cartridge of the present invention;
FIG. 10 is an enlarged view of portion A of FIG. 9;
FIG. 11 is an exploded perspective view of the rotational force transmitting head, the pin shaft and the rotational force receiving teeth with respect to the driving shaft of the main unit in the first embodiment of the process cartridge of the present invention;
fig. 12 is a front view of a rotational force receiving head in the first embodiment of the process cartridge of the present invention;
FIG. 13 is a perspective view of an end cover plate in the first embodiment of the process cartridge of the present invention;
FIG. 14 is a perspective view of an end cover plate and a rotational force transmitting assembly in the first embodiment of the process cartridge of the present invention;
FIG. 15 is a schematic view of a biasing mechanism in the first embodiment of the process cartridge of the present invention;
FIG. 16 is a schematic view showing a first engagement state of the biasing mechanism and the rotational force transmitting assembly in the printing process in the first embodiment of the process cartridge of the present invention;
FIG. 17 is a schematic view showing a first engagement state between the biasing mechanism and the rotational force transmitting member when the pair of rotational force receiving teeth are in a disengaged state in the first embodiment of the process cartridge according to the present invention;
FIG. 18 is a schematic view showing a second engagement state between the biasing mechanism and the rotational force transmitting member in the case where the pair of rotational force receiving teeth of the first embodiment of the process cartridge according to the present invention are in the decoupled state;
FIG. 19 is a schematic view showing a third engagement state between the biasing mechanism and the rotational force transmitting member when the pair of rotational force receiving teeth are in a decoupled state in the first embodiment of the process cartridge according to the present invention;
FIG. 20 is a schematic view showing a fourth engagement state between the biasing mechanism and the rotational force transmitting assembly in the case where the pair of rotational force receiving teeth of the first embodiment of the process cartridge according to the present invention are in the decoupled state;
FIG. 21 is a schematic view showing a fifth engagement state between the biasing mechanism and the rotational force transmitting member when the pair of rotational force receiving teeth are in a disengaged state in the first embodiment of the process cartridge according to the present invention;
FIG. 22 is a schematic view of a sector of the first embodiment of the cartridge of the present invention;
FIG. 23 is a schematic view showing the construction of another deviating mechanism in the first embodiment of the cartridge of the present invention;
FIG. 24 is a schematic view showing the state of the rotational force receiving head, the deviating mechanism and the driving shaft of the main unit in the process of dropping the first embodiment of the process cartridge of the present invention;
FIG. 25 is a perspective view of an end cover plate, a biasing mechanism and a rotational force receiving head in the second embodiment of the process cartridge of the present invention;
FIG. 26 is a schematic view showing a first construction of a biasing mechanism in a second embodiment of the cartridge according to the present invention;
FIG. 27 is a schematic view showing a second structure of the biasing mechanism in the second embodiment of the process cartridge according to the present invention;
FIG. 28 is a schematic view showing a third construction of the biasing mechanism in the second embodiment of the process cartridge of the present invention;
FIG. 29 is a schematic view showing a fourth structure of the biasing mechanism in the second embodiment of the process cartridge of the present invention;
FIG. 30 is a schematic view showing a fifth construction of the biasing mechanism in the second embodiment of the cartridge of the present invention;
FIG. 31 is a schematic view showing a sixth construction of the biasing mechanism in the second embodiment of the process cartridge of the present invention;
FIG. 32 is a schematic view showing a seventh construction of the biasing mechanism in the second embodiment of the process cartridge of the present invention.
The invention is further illustrated by the following examples and figures.
Detailed Description
The invention mainly adds a deviation mechanism between the box body of the processing box and the rotating force transmission assembly to improve the smoothness of the falling process of the processing box, and other structures of the processing box can be completely designed according to the existing products.
The following embodiments are directed mainly to the process cartridge of the present invention, and since the process cartridge of the present invention employs the rotational force transmitting assembly and the photosensitive drum of the present invention, the description of the rotational force transmitting assembly embodiment and the photosensitive drum embodiment has been included in the description of the embodiments of the process cartridge.
First embodiment of Process Cartridge
Referring to fig. 6, the process cartridge 1 has a cartridge body 10 and a photosensitive drum 11 rotatably supported between both end walls of the cartridge body 10 about a rotation axis 001, and the cartridge body 10 has an end cover 13 provided on a driving end. The photosensitive drum 11 has a drum and a rotational force transmitting assembly 2 as shown in fig. 7, the rotational force transmitting assembly 2 being mounted to one axial end of the drum.
Referring to fig. 7 to 9, the rotational force transmitting assembly 2 is constituted by the rotational force receiving head 3, the axial direction restricting member 21, the spring 22, and the drum gear 23. The drum gear 23 is provided with an accommodating chamber 231 opened at one axial end thereof, and a guide hole 232 communicating with the accommodating chamber 231 is formed at the other axial end. The spring 22 constitutes the axial return member of the present embodiment.
The rotational force receiving head 3 is constituted by a rotational force transmitting head 31, a transmitting shaft 32, two torsion springs 33, a pin 34, and rotational force receiving teeth 35.
The rotational force transmitting head 31 is composed of a cylindrical guide rod 311 and a rotational force receiving portion 312 at one axial end of the guide rod 311, and a through hole 3111 is formed in the middle of the guide rod 311 in the radial direction to be engaged with the transmission shaft 32. The rotating force receiving portion 312 is concavely formed with a stepped hole 3121 at an outer end wall 3120 facing away from the guide bar 311, a leading-in surface 31210 is formed at a port of the stepped hole 3121, a pair of mounting grooves 3122 for mounting the rotating force receiving teeth 35 are formed at the rotating force receiving portion 312, and shaft holes 3123 for fitting with the pin shaft 34 are formed at both sides of the mounting grooves 3122. The end of the guide bar 311 adjacent to the rotational force receiving portion 312 is a force receiving section 313.
The drum gear 23 is substantially cylindrical in appearance, and a helical gear 230 is provided on a radially outer wall of the drum gear 23 at about the middle in the axial direction thereof for transmitting the rotational force received by the drum gear 23 to other rotary members; an inner wall of the accommodation chamber 231 parallel to the axial direction of the drum gear 23 is provided with an input arm 233 extending toward the radial center of the drum gear 23. The other axial end of the guide rod 311 passes through the through hole formed in the axial direction limiting piece 21 in sequence, the spring 22, the accommodating chamber 231 reach the guide hole 232 in clearance fit therewith, so that the rotational force transmitting head 31 can reciprocate axially along the guide rod 311 relative to the drum gear 23; in the circumferential direction of the drum gear 23, the transmission shaft 32 comes into abutting contact with the input arm 233 at the position of the input arm 233, thereby transmitting the rotational force received by the rotational force transmitting head 31 to the drum gear 23; when the force receiving section 313 is subjected to circumferential torque, the rotational force transmission head 31 can rotate around the rotation axis 001 within a predetermined angular range relative to the drum gear 23, and the predetermined angular range is regulated and controlled by the structures, sizes and numbers of the input arms 233 and the transmission shafts 32.
One end of the spring 22 abuts against the transmission shaft 32 and the other end abuts against the bottom surface of the accommodating chamber 231. The axial limiting member 21 is covered on the open end of the accommodating cavity 231, and the elastic restoring force of the spring 22 in the axial direction forces the transmission shaft 32 to abut against the axial limiting member 21.
Referring to fig. 10, the rotational force receiving teeth 35 are formed at the upper end portion thereof with a coupling surface 350, at the lower end portion thereof with a shaft hole 351 to be matched with the pin shaft 34, at the side of the upper end portion facing away from the coupling surface 350 with a projection 353 formed convexly, and at the lower end portion thereof with a receiving groove 352 concavely formed therein for receiving the coil 330. The pin 34 is matched with the shaft hole 3123, the shaft hole 351 and the spring coil 330, so that the rotating force receiving tooth 35 is hinged into the mounting groove 3122, namely hinged to the rotating force transmitting head 31 through a hinge shaft, and can rotate back and forth between a coupling position and a disengagement position, and the axis of the pin 34 is perpendicular to and opposite to the rotating axis 001 shown in fig. 8 in space; one torsion arm 331 of the torsion spring 33 abuts against the rotational force receiving portion 312, and the other torsion arm 332 abuts against the rotational force receiving tooth 35; the rotary force receiving tooth 35 is limited at the coupling position by the protrusion 353 abutting against the outer end wall 3120, that is, the outer end wall 3120 constitutes a limiting part for the rotary force receiving tooth 35 to rotate from the coupling position to the separation position; the elastic restoring force of the torsion spring 33 forces the projection 353 against the outer end wall 3120, i.e., forces the rotational force receiving tooth 35 at the coupling position.
Referring to fig. 11 and 12, the second plane 091 is a plane whose normal direction is parallel to the axial direction of the pin 34, the third plane 092 is a plane parallel to the axial direction of the pin 34, and the rotation axis 001 is in the second plane 091 and the third plane 092 as shown in fig. 6. As shown in fig. 11, the main body driving shaft drives the rotational force transmitting head 31 to rotate counterclockwise around the rotational axis 001, when the rotational force output arm 021 of the driving shaft is coupled with the rotational force receiving tooth 35, the side of the rotational force receiving tooth 35 facing away from the coupling surface 350 abuts against the abutting side wall 3124 of the mounting groove 3122, so as to transmit the rotational force to the rotational force transmitting head 31, when the abutting side wall 3124 is parallel to the second plane 091, the tangential direction of the acting force between the rotational force receiving tooth 35 and the abutting side wall 3124 along the rotational direction of the rotational force transmitting head 31 can be ensured, i.e. a component force parallel to the second plane 091 is not generated, and the outward expansion of the rotational force receiving tooth 35 during the rotation process can be effectively prevented, so as to improve the stability of the coupling between the rotational force transmitting assembly and the main body driving shaft. When the rotational force output arm 021 is coupled with the coupling surface 350, the second plane 091 forms an axial symmetry plane of the rotational force output arm 021, meanwhile, the projections of the two coupling surfaces 350 on the third plane 092 form a first circular arc, the projections of the two rotational force output arms 021 on the third plane 092 form a second circular arc, the first circular arc and the second circular arc are concentric and have the same radius, so that the acting force applied by the rotational force output arm 021 to the rotational force receiving tooth 35 is effectively ensured to be tangential along the rotational circumferential direction of the rotational force transmission head 31, and the coupling stability between the rotational force transmission head 31 and the main machine driving shaft is improved. When the two rotational force receiving teeth 35 are arranged in the rotational direction toward the position deviated from the second plane 091, that is, in the rotational direction of the rotational force transmitting head 31, the rotational force receiving teeth 35 are positioned between the second plane 091 and the abutment side wall 3124, thereby reducing the lateral dimension of the rotational force receiving teeth 35 under the strength requirement of the rotational force receiving teeth 35 is satisfied to improve the smoothness of the coupling and decoupling process of the rotational force transmitting assembly with the driving shaft.
Referring to fig. 13, the end cover 13 is provided with two resilient bars 12 arranged parallel to each other and cooperating with the force-bearing section 313 as shown in fig. 9. In the process cartridge 1, the engagement of the rotational force transmitting assembly 2 with the end cover 13 is as shown in fig. 14, and the force receiving section 313 is sandwiched between the two elastic bars 12. As shown in fig. 15, the two elastic rods 12 are in an outward bending elastic deformation state due to the pressing action of the force receiving section 313, and will apply an inward pressing reaction force to the force receiving section 313, and the reaction force will generate a torque to the force receiving section 313.
Referring to fig. 15, the cross-section of the force-receiving section 313 is a first non-circular surface consisting of a first circular surface 3130 and a first protrusion surface 3131 and a second protrusion surface 3132 formed by radially protruding from an edge of the first circular surface 3130. The first protrusion surface 3131 and the second protrusion surface 3132 are arranged symmetrically with respect to the center of the first circular surface 3130. In the convex direction, the size of the first protrusion face 3131 gradually decreases in a direction perpendicular to the radial direction. The dimension of the second projection surface gradually decreases in a direction perpendicular to the radial direction along the projection direction.
When the rotational force receiving teeth 35 rotate the drum gear 23 to the position shown in fig. 16 by abutment of the transmission shaft 32 with the input arm 233, and when the pair of rotational force receiving teeth 35 are in the decoupled state, the elastic restoring force of the elastic lever 12 generates a torque by the force receiving section 313 to force the rotational force transmitting head to rotate about the rotational axis to the position shown in fig. 17 with respect to the drum gear 23.
When the rotational force receiving teeth 35 are driven by the main machine driving shaft and bring the rotational force receiving head and the drum gear 23 to rotate counterclockwise by 45 degrees, 90 degrees, 135 degrees and 180 degrees with respect to the position shown in fig. 16, and when the pair of rotational force receiving teeth 35 are in the decoupled state, the rotational force transmitting head is forced to rotate the rotational force receiving teeth 35 about the rotational axis with respect to the drum gear 23 to the position shown in fig. 18, 19, 20 and 21 by the torque generated by the elastic restoring force of the elastic rod 12 and the abutting action between the transmitting shaft 32 and the input arm 233. It can be seen that when the main body drive shaft drives the connecting line between the pair of rotational force receiving teeth 35 to rotate to lie within the scallops 121 and 122 as shown in fig. 22, then, if the rotational force receiving teeth 35 are decoupled from the main body drive shaft, such as when a process cartridge is pulled out of the main body, the connecting line between the pair of rotational force receiving teeth 35 will be deviated outside the region of the scallops 121 and 122 by the elastic restoring force of the elastic lever 12. The central angle of the sectors 121, 122 is less than 90 degrees, the specific size being related to the configuration and dimensions of the first non-circular surface.
Of course, this effect can be achieved by replacing the cross section of the force-bearing section with the diamond surface 1313 as shown in fig. 23, and when the diamond surface 1313 is square, the central angle between the sector 121 and the sector 122 will reach 90 degrees.
Referring to fig. 24, the insertion direction 006 of the process cartridge into the host is shown by an arrow, the first plane 004 is arranged parallel to the insertion direction 006, and the rotation axis 001 is in the first plane 004.
Before the process cartridge is dropped, that is, when the pair of rotational force receiving teeth 35 are in the disconnected state, if the connecting line 005 between the pair of rotational force receiving teeth 35 can be not parallel to the insertion direction 006, that is, the connecting line 005 and the insertion direction 006 form an included angle, part of the rotational force receiving teeth 35 can avoid the host driving shaft 02 during the dropping process, so as to improve the smoothness of the dropping process of the process cartridge; when the whole rotating force receiving tooth 35 deviates from the first plane 004 before the machine falls, the rotating force receiving tooth 35 can further avoid the main machine driving shaft 02 in the machine falling process so as to further improve the smoothness of the machine falling process; as shown in fig. 22, by adjusting the relationship between the sectors 121 and 122 and the insertion direction 006, the connecting line 005 between the rotational force receiving teeth 35 can be deviated from a sector 1210 having the sector 121 as the upper limit and the angular bisector arranged in parallel to the insertion direction 006 before the machine falls, the sector 1210 being a hatched area shown in fig. 22, to further improve the smoothness of the machine falling process; if the included angles between the two sides of the sector 1210 and the adjacent sides of the two sides of the sector 121 are both greater than or equal to half of the central angle of the rotating force receiving tooth 35, it means that the rotating force receiving tooth 35 can be deviated from the sector 1210 before falling, and when the central angle of the sector 1210 is greater than or equal to the central angle of the rotating force receiving tooth 35, the falling smoothness can be obviously improved; when the central angle of the segments 121 and 122 is 90 degrees and the insertion direction 006 is parallel to the bisector of the two, i.e., the segment 1210 coincides with the segment 121, the angle between the connecting line 005 and the insertion direction 006 is 45 degrees or more when the pair of rotational force receiving teeth 35 are in the disconnected state.
In the present invention, the line 005 between the pair of rotational force receiving teeth 35 is defined as: the rotational force receiving tooth 35 is located above the outer end wall 3120 and is connected to the projection center on the outer end wall 3120. The central angle of the rotational force receiving tooth 35 is defined as: and the intersection point of the rotating axis 001 and the plane of the outer end wall 3120 is taken as the center of circle, and the center of circle and the part of the rotating force receiving tooth 35 above the outer end wall 3120 form an included angle between two tangent lines of the contour line projected on the outer end wall 3120. In the projection process, if the outer end wall 3120 is an end surface perpendicular to the rotation axis 001, the projection is made to the end surface; if the outer end wall 3120 is an arc-shaped end surface, the projection is to a plane perpendicular to the rotation axis 001 and passing through the highest point of the outer end wall 3120. The insertion direction 006 is the insertion direction of the process cartridge to the host during the falling process, and can be determined by the guide post when the process cartridge end cover is provided with the guide post matched with the guide piece on the host.
Wherein the size of the central angle of the sectors 121, 122 is independent of the relative position between the rotation force receiving tooth 35 and the elastic rod 12, and is dependent on the cross-sectional shape of the force-receiving section 313.
The two elastic rods 12 together constitute the deviation mechanism of the present embodiment, for forcing the rotational force transmitting head to rotate to a position where the connecting line 005 between the pair of rotational force receiving teeth 35 has an angle with the insertion direction 006 when the pair of rotational force receiving teeth 35 is in the decoupled state, so as to improve the smoothness of the process cartridge dropping process.
Second embodiment of Process Cartridge
As a description of the second embodiment of the process cartridge of the present invention, only the differences from the first embodiment of the process cartridge will be described below.
The deviating mechanism in this embodiment is constituted by a first magnet, a second magnet, and a third magnet.
Referring to fig. 25, the first magnet 41 fixed to the end cover plate 13 and the second and third magnets 42 and 43 fixed to the end of the guide rod 311 adjacent to the rotational force receiving portion 312 are used instead of the two elastic rods in the first embodiment of the process cartridge, and the fixing place of the second and third magnets 42 and 43 constitutes the force receiving section of the present embodiment, the cross-sectional shape of which is not limited. As shown in fig. 26, the connection lines of the magnetic poles of the first magnet 41, the second magnet 42 and the third magnet 43 are all arranged in the radial direction of the guide rod 311 and in the same plane, and the second magnet 42 and the third magnet 43 are arranged in the opposite direction with the same polarity, that is, they are fixed on the opposite sides of the guide rod 311 and the connection lines of the magnetic poles are collinear. The magnetic poles at the free ends of the first magnet 41 and the second magnet 42 are unlike magnetic poles, and the connecting line between the two rotating force receiving teeth 35 is parallel to the connecting line of the magnetic poles of the first magnet 41. At this time, the first quadrant is a sector 121, the third quadrant is a sector 122, and the central angles of both sectors are 90.
Referring to fig. 27, in the second deviation mechanism of this embodiment, the first magnet 41 is fixed on the guide rod 311, the second magnet 42 and the third magnet 43 are fixed on the box body with the same poles facing each other, and the magnetic pole connecting lines of the three magnets are arranged along the radial direction of the guide rod 311 and are coplanar. The free ends of the first magnet 41 and the second magnet 42 are unlike magnetic poles, and the line connecting the two rotational force receiving teeth 35 is orthogonal to the line connecting the magnetic poles of the first magnet 41, so that the second quadrant is the sector 121, the fourth quadrant is the sector 122, and the central angles are both 90 degrees.
Referring to fig. 28, in the third deviation mechanism of the present embodiment, the first magnet 41 is fixed on the guide rod 311, the second magnet 42 and the third magnet 43 are fixed on the box body in a homopolar opposite arrangement, and the magnetic pole connecting lines of the three magnets are arranged along the radial direction of the guide rod 311 and are coplanar. The free ends of the first magnet 41 and the second magnet 42 are unlike magnetic poles, and the line connecting the two rotational force receiving teeth 35 coincides with the line connecting the magnetic poles of the first magnet 41, so that the first quadrant is the sector 121, the third quadrant is the sector 122, and the central angle is 90 degrees.
Referring to fig. 29, in the fourth deviation mechanism of the present embodiment, the first magnet 41 is fixed on the case, the second magnet 42 and the third magnet 43 are fixed on the guide rod 311 with their magnetic poles arranged in the same direction, and the magnetic pole connecting lines of the three magnets are arranged along the radial direction of the guide rod 311 and are coplanar. The free ends of the first magnet 41 and the second magnet 42 are unlike magnetic poles, and the line connecting the two rotational force receiving teeth 35 is orthogonal to the line connecting the magnetic poles of the first magnet 41, so that the second quadrant is the sector 121, the fourth quadrant is the sector 122, and the circular angle is 90 degrees.
Referring to fig. 30, in the fifth deviation mechanism of this embodiment, the first magnet 41 is fixed on the guide rod 311, the second magnet 42 and the third magnet 43 are fixed on the box body with their magnetic poles arranged in the same direction, and the magnetic pole connecting lines of the three magnets are arranged along the radial direction of the guide rod 311 and are coplanar. The free ends of the first magnet 41 and the second magnet 42 are unlike magnetic poles, and the line connecting the two rotational force receiving teeth 35 coincides with the line connecting the magnetic poles of the first magnet 41, so that the first quadrant is the sector 121, the third quadrant is the sector 122, and the central angle is 90 degrees.
Referring to fig. 31, in the sixth deviation mechanism of this embodiment, the first magnet 41 is fixed on the guide rod 311, the second magnet 42 and the third magnet 43 are fixed on the box body in a magnetic pole opposite arrangement, and the magnetic pole connecting lines of the three magnets are arranged along the radial direction of the guide rod 311 and are coplanar. The free ends of the first magnet 41 and the second magnet 42 are like magnetic poles, and the line connecting the two rotational force receiving teeth 35 coincides with the line connecting the magnetic poles of the first magnet 41, so that the second quadrant is the sector 121, the fourth quadrant is the sector 122, and the central angle is 90 degrees.
Referring to fig. 32, which is a seventh deviation mechanism in this embodiment, the first magnet 41 is fixed on the box, the second magnet 42 and the third magnet 43 are fixed on the guide rod 311 with their magnetic poles arranged oppositely, and the magnetic pole connecting lines of the three magnets are arranged along the radial direction of the guide rod 311 and are coplanar. The free ends of the first magnet 41 and the second magnet 42 are like magnetic poles, and the line connecting the two rotating force receiving teeth 35 is orthogonal to the line connecting the magnetic poles of the first magnet 41, so that the first quadrant is the sector 121, the third quadrant is the sector 122, and the central angles are both 90 degrees.
In this embodiment, the magnetic pole connecting line of the magnet refers to a connecting line between the N pole and the S pole, for example, if one end of a cylindrical magnet is the N pole and the other end is the S pole, the magnetic pole connecting line is a connecting line between the centers of the two end faces.
When the bisector of the quadrant in which the sector is located is parallel to the insertion direction of the process cartridge into the main unit, the two rotational force receiving teeth 35 can be made to avoid the drive shaft well in the falling process.
The main idea of the invention is that a deviation mechanism is added on the processing box, when a pair of rotating force receiving teeth are in a disconnection state, the deviation mechanism applies force to a force-bearing section arranged on a rotating force transmission head to force the rotating force transmission head to rotate to a position where an included angle is formed between a connecting line between the pair of rotating force receiving teeth and the insertion direction of the processing box to a host machine, thereby improving the smoothness of the dropping process of the processing box; there are many obvious variations of the structure of the rotational force receiving head.
Claims (12)
1. A process cartridge including a cartridge body and a photosensitive drum rotatably supported between both end walls of the cartridge body about a rotation axis;
the photosensitive drum comprises a drum barrel and a rotating force transmission assembly arranged at one axial end of the drum barrel, wherein the rotating force transmission assembly comprises a drum gear, an axial reset piece, a rotating force transmission head and a pair of rotating force receiving teeth;
the method is characterized in that:
the rotational force transmitting head is provided with a force receiving section for receiving a force for forcing the rotational force transmitting head to rotate around the rotational axis within a predetermined angular range relative to the drum gear;
and when the pair of rotating force receiving teeth are in a decoupling state, the biasing mechanism applies force to the force receiving section to force the rotating force transmission head to rotate to a position where an included angle is formed between a connecting line between the pair of rotating force receiving teeth and the insertion direction of the processing box to the host machine.
2. A process cartridge according to claim 1, wherein:
the deviation mechanism forces the rotational force transmitting head to rotate until the rotational force receiving teeth deviate from the first plane;
the first plane is parallel to the insertion direction and the axis of rotation is in the first plane.
3. A process cartridge according to claim 2, wherein:
said biasing means urging said rotational force transmitting head to rotate said rotational force receiving tooth to be biased to a sector perpendicular to said rotational axis;
the apex of the sector is on the axis of rotation and the bisector of the angle of the sector is arranged parallel to the insertion direction.
4. A process cartridge according to claim 3, wherein:
the central angle of the sector is larger than or equal to that of the rotating force receiving tooth.
5. A cartridge according to claim 1, wherein:
the included angle is greater than or equal to 45 degrees.
6. A process cartridge according to any one of claims 1 to 5, wherein:
the deviation mechanism comprises a first magnet, a second magnet and a third magnet, wherein the magnetic pole connecting lines are arranged along the radial direction of the drum barrel in a coplanar manner;
one of the force-bearing section and the box body is fixed with the first magnet, and the other is fixed with the second magnet and the third magnet;
the magnetic pole connecting lines of the second magnet and the third magnet are collinear.
7. A process cartridge according to any one of claims 1 to 5, wherein:
the rotating force transmission head comprises a guide rod and a rotating force receiving part positioned at one axial end of the guide rod, and the end part of the guide rod, which is adjacent to the rotating force receiving part, is the stressed section;
the deviation mechanism comprises two elastic rods which are arranged in parallel, and the stress section is clamped between the two elastic rods;
the cross section of the stress section is a rhombic surface or a first non-circular surface;
the first non-circular surface consists of a first circular surface, a first protruding surface and a second protruding surface, wherein the first protruding surface and the second protruding surface are formed by protruding from the edge of the first circular surface along the radial direction;
the first protrusion surface and the second protrusion surface are arranged in a central symmetry mode relative to the circle center of the first circular surface;
the size of the first projection surface is gradually reduced along the projection direction of the first projection surface in the direction perpendicular to the radial direction;
the second projection surface is gradually reduced in size in a direction perpendicular to the radial direction along a projection direction of the second projection surface.
8. A process cartridge according to any one of claims 1 to 5, wherein:
the rotating force receiving teeth are hinged to the rotating force transmission head through a hinge shaft, and the axis of the hinge shaft and the rotating axis are mutually perpendicular and are different in plane in space;
the rotary force receiving teeth can rotate around the hinge shaft in a reciprocating mode between a connecting position and a disengaging position;
the rotating force transmission head is provided with a limiting part which limits the rotating force receiving teeth to turn from the coupling position to a position far away from the disengagement position;
still include the tooth piece that resets, the tooth piece that resets forces the revolving force receiving tooth to support and lean on spacing portion.
9. The rotating force transmission assembly comprises a drum gear, an axial reset piece, an axial limiting piece, a rotating force transmission head and a rotating force receiving tooth;
the rotating force transmission head comprises a guide rod and a rotating force receiving part arranged at one axial end of the guide rod;
the method is characterized in that:
the end of the guide bar adjacent to the rotational force receiving portion is a force receiving section for receiving a force for forcing the rotational force transmitting head to rotate relative to the drum gear about the central axis of the guide bar within a predetermined angular range.
10. A rotational force transmitting assembly according to claim 9, wherein:
a first magnet or a second magnet and a third magnet are fixed on the stress section, and the magnetic pole connecting lines of the first magnet, the second magnet and the third magnet are arranged along the radial direction of the guide rod;
the magnetic pole connecting lines of the second magnet and the third magnet are collinear.
11. A rotational force transmitting assembly according to claim 9, wherein:
the cross section of the stress section is a rhombic surface or a first non-circular surface;
the first non-circular surface is composed of a first circular surface, a first protruding surface and a second protruding surface, wherein the first protruding surface and the second protruding surface are formed by protruding from the edge of the first circular surface along the radial direction;
the first protrusion surface and the second protrusion surface are arranged in a central symmetry mode relative to the circle center of the first circular surface;
the size of the first projection surface is gradually reduced along the projection direction of the first projection surface in the direction perpendicular to the radial direction;
the second projection surface is gradually reduced in size in a direction perpendicular to the radial direction along a projection direction of the second projection surface.
12. The photosensitive drum comprises a drum barrel and a rotating force transmission assembly arranged at one axial end of the drum barrel;
the method is characterized in that:
the rotational force transmitting assembly as claimed in any one of claims 9 to 11.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610375183.4A CN105807596B (en) | 2016-05-30 | 2016-05-30 | Processing box and rotary force transmission assembly and photosensitive drum thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610375183.4A CN105807596B (en) | 2016-05-30 | 2016-05-30 | Processing box and rotary force transmission assembly and photosensitive drum thereof |
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| CN105807596B true CN105807596B (en) | 2022-05-06 |
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| CN201610375183.4A Active CN105807596B (en) | 2016-05-30 | 2016-05-30 | Processing box and rotary force transmission assembly and photosensitive drum thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107831645B (en) * | 2017-12-15 | 2024-02-20 | 珠海联合天润打印耗材有限公司 | Rotational driving force receiving member, driving assembly, and cartridge |
| US10416604B1 (en) | 2018-04-18 | 2019-09-17 | Jiangxi Yibo E-Tech Co.Ltd. | Process cartridge |
| US10338513B1 (en) | 2018-04-18 | 2019-07-02 | Jiangxi Yibo E-Tech Co., Ltd. | Process cartridge |
| CN108873659A (en) * | 2018-07-24 | 2018-11-23 | 珠海天威飞马打印耗材有限公司 | Handle box |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH07257776A (en) * | 1994-03-23 | 1995-10-09 | Canon Inc | Drive transmitting device and image forming device |
| JP6017323B2 (en) * | 2013-01-15 | 2016-10-26 | ヒロセ電機株式会社 | Rotation detector |
| JP6265080B2 (en) * | 2014-07-10 | 2018-01-24 | 三菱ケミカル株式会社 | End member, photosensitive drum unit, developing roller unit, and process cartridge |
| CN105334712B (en) * | 2014-08-08 | 2019-05-17 | 江西镭博钛电子科技有限公司 | A kind of handle box |
| CN205787613U (en) * | 2016-05-30 | 2016-12-07 | 珠海天威飞马打印耗材有限公司 | Handle box and revolving force transmitting assembly thereof and photosensitive drums |
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