CN1763638A - Driving force transmission mechanism, image forming apparatus equipped with such a mechanism, and process unit of such an apparatus - Google Patents
Driving force transmission mechanism, image forming apparatus equipped with such a mechanism, and process unit of such an apparatus Download PDFInfo
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- CN1763638A CN1763638A CN 200510097878 CN200510097878A CN1763638A CN 1763638 A CN1763638 A CN 1763638A CN 200510097878 CN200510097878 CN 200510097878 CN 200510097878 A CN200510097878 A CN 200510097878A CN 1763638 A CN1763638 A CN 1763638A
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Abstract
A drive transmission apparatus includes a first coupling portion having a polygonal shape; a second coupling portion having a hole portion which has a cross-sectional configuration larger than the first coupling portion, the hole portion being engageable with the first coupling portion; and a center shaft provided on the first coupling or the second coupling, the center shaft penetrating the other one of the first and second coupling.
Description
Invention field
The present invention relates to be equipped with the image forming apparatus of driving force transmission mechanism and the processing unit that this image forming apparatus uses.
Background technology
Usually, the drive system as the photosensitive drums of image bearing piece that is used for driving such as the image forming apparatus of duplicating machine, printer etc. comprises: driven wheel, and it receives driving force and transmits this driving force from the image forming apparatus master component; Gear shaft, it is coaxial and rotate with driven wheel with driven wheel.Have two kinds of methods of utilizing this drive systems photosensitive drums: a kind of driving method adopts the driving shaft unitor, and another kind of method does not adopt the driving shaft unitor.Figure 12 represents not adopt the ultimate principle of driving shaft unitor method.
Referring to Figure 12, the gear shaft 13 that is directly connected to driven wheel 12 passes photosensitive drums 80, and as the drum axle of photosensitive drums 80.In this structure, photosensitive drums 80 is supported, so drum 80 rotates with gear shaft 13.In this driving method, the rotation that is used to transmit the driven wheel 12 of motor 11 driving forces is directly delivered to photosensitive drums 80.
Figure 13 represents to adopt the ultimate principle of driving shaft unitor method.In this structure, gear shaft 13 is not directly but is connected to photosensitive drums 80 through the shaft coupling 23 that inserts that the driving force of motor 11 is delivered to photosensitive drums 80 through gear shaft 13 and shaft coupling 23.
Relatively two kinds of driving methods adopt the method for unitor to have advantage aspect cost.In addition, in the image formation system that constitutes around photosensitive drums, photosensitive drums is not integrally put in a box (handle box) with single or multiple treating apparatus, for example developing apparatus.Therefore, how on the image forming apparatus master component, to mount and dismount handle box easily and just become extremely important.This caused people to various unitors, promptly to connecting two axles so that driving force is delivered to the attention of another device from an axle.In various unitors, unitor for example shown in Figure 14 has the unitor of matrix shaft coupling and convex shaft coupling, wherein, driving force is transmitted by the engagement between two shaft couplings and is transmitted performance because of its superior driving force and begins to cause paying special attention to of people.The advantage that all unitors as shown in figure 14 transmit on the performance in driving force because of them is widely used.
But, with regard to the driving force transmitting accuracy, based on the driving method of unitor not as direct driving method; In other words, the worrying driving method that is based on unitor can be adversely affected because of problem or the other problem that unitor makes problem, the unitor of two interconnective angles of axle two axles are aimed at mutually.When image forming apparatus is subjected to harmful effect because of the problems referred to above, image can relative record medium depart from and reduce image and form quality.This problem is especially obvious in the image forming apparatus that forms coloured image with multiple different images colored, different levels on recording medium.
As the unitor that is used to address the above problem, have the unitor that comprises matrix shaft coupling and convex shaft coupling, wherein at least one shaft coupling is the polygon post.Figure 15 represents the example of this unitor, and this unitor comprises the matrix shaft coupling with polygon cylindrical hole and has the convex shaft coupling of polygon column-shaped projection.
Referring to Figure 15, gear shaft 13, be that the parts of the drive system I of equipment master component are provided with the matrix shaft coupling 14 that is installed to gear shaft 13 1 ends and are provided with the distortion hole 50 that the cross section is an equilateral triangle.
On the other hand, constitute the photosensitive drums 80 of parts being driven the system that the I of system driven or the projection 10 that sleeve member is provided with a distortion, the twist angle of projection 10 is identical with the twist angle in the distortion hole of matrix shaft coupling 50 and have a cross section of equilateral triangle.The convex part 53 of projection 10 of distortion cylindricality with equilateral triangle tee section is as two drum flanges 80.Though the projection 10 here is polygon triangular column, the polygon post that it also can the polygon triangular-section of right and wrong.When sidewall in matrix part hole contact with a sidewall of convex part, the interface between two parts formed the line 60 that twists.So, when rotating force is applied to matrix part and two parts when being meshing with each other, the convex part, be that parts on photosensitive drums 80 sides are drawn into the matrix part, or the relative equipment master component of the parts on the equipment master component is accurately located.As a result, this effect is accurately located two axles, is eliminated along photosensitive drums 80 thrust and effect radially between photosensitive drums 80 and equipment master component.
Figure 16 represents the sectional view done along perpendicular to the plane of the axis of intermeshing matrix and convex part 14 and 53 liang of parts.In Figure 16 (a), solid line represents to have the matrix part 71 in hole 50 or the section of driving side, and this section is an equilateral triangle, and dotted line is represented projection 10 or be driven the section of side that this section is an equilateral triangle.Under the state shown in Figure 16 (a), though projection 10 is arranged in hole 50, the edge of projection 10 does not contact with the respective side walls in hole 50, so exist two play and matrix axis C1 partly between the parts not overlap with the axis C2 of convex part.But, when rotating drive power was applied to matrix part 71, three sidewalls in hole 50 contacted, automatically make axis C1 and C2 to overlap with three edges of projection 10 one to one, shown in Figure 16 (b).Under the state shown in Figure 16 (b), the driving force that is applied to matrix part 71 is transmitted by the interface (contact point) between matrix and the convex part as power F.
As mentioned above, comprise the unitor of matrix part and convex part, wherein, convex partly inserts the matrix part and contacts with it, makes two axles can connect, make simultaneously two axles automatically to aim at, accurately locate, also eliminate loosening.Therefore, this unitor is considered to the photosensitive drums of boxlike image formation unit and the effective link between the image forming apparatus master component.In addition, the unitor with the matrix part hole of polygon post of distortion and convex part projection can provide except that above-mentioned effect relative it is axial and pull to the effect of image forming apparatus master component with photosensitive drums.
But above-mentioned unitor can go wrong when being subjected to non-power from drive system in the system of being driven, and the contact between two systems can be disturbed.For example, when photosensitive drums contacted with intermediate transfer rollers, sensitive piece was subjected to applying thereon power along the sensitive piece circumferencial direction, and this power is disturbed the contact between two parts of above-mentioned unitor.More specifically, aimed at mutually by the contact between unitor two parts by two axles that the matrix of above-mentioned unitor and convex part connects one to one, so, when the contact between two parts is interfered, two axles become and depart from each other, when forming image, cause image and recording medium to depart from.This is a very big problem.
Summary of the invention
Therefore, fundamental purpose of the present invention provides a kind of driving force transmission mechanism, even not being the power that is delivered to the system of being driven from drive system when disturbing, this driving force transmission mechanism matrix that also can guarantee unitor in the contact between the matrix of unitor and the convex part keeps normally contacting between partly with convex, so, the sleeve part that is driven system keeps suitable supporting, no matter the size when matrix and convex partly are meshing with each other between them is how, can both keep being driven with drive system between aim at.
According to an aspect of the present invention, provide a kind of driving force transfer device, this device comprises: the first unitor part, and it has polygon; The second unitor part, it has the bore portion of cross-section structure greater than described first unitor part, and described bore portion can partly mesh with described first unitor; Central shaft, it is arranged on described first unitor or described second unitor part, and described central shaft passes another in described first and second unitors.
According to a further aspect in the invention, provide a kind of image forming apparatus, this image forming apparatus comprises: sensitive piece; Charging device is used for to described sensitive piece charging; Image processing system is used for forming electrostatic image on the described sensitive piece that is charged by described charging device; Developing apparatus is used for described electrostatic image development; Transfer device is used for the image that developing apparatus develops is transferred to recording medium; Drive source; Driver is used for and will be delivered to described sensitive piece from described drive source drives power; The first unitor part, it has polygon; The second unitor part, it has the bore portion of cross-section structure greater than described first unitor part, and described bore portion can partly mesh with described first unitor; Central shaft, it is arranged on described first unitor or described second unitor part, and described central shaft passes another in described first and second unitors; Wherein, described sensitive piece has in described first unitor part and described second unitor part, and described driver is as another unitor part.
According to a further aspect of the invention, a kind of processing unit that can be releasably attached on the image forming apparatus with drive part is provided, described processing unit comprises the treating apparatus that can act on sensitive piece, described processing unit comprises: the first unitor part, and it has polygon, also can mesh with the drive part of equipment master component; Bore portion, it and the central shaft engagement of passing the mate between described first unitor part and the driver.
To make these and other objects of the present invention, characteristic and advantage become clearer below in conjunction with accompanying drawing to the explanation of the preferred embodiment of the present invention.
To brief description of drawings
Fig. 1 is the schematic sectional view of image forming apparatus example of the present invention.
Fig. 2 is the cut-open view of processing unit example of the present invention.
Fig. 3 is the cut-open view of driving force transmission mechanism example of the present invention.
Fig. 4 is the cut-open view of another driving force transmission mechanism example of the present invention.
Fig. 5 is the cut-open view of another driving force transmission mechanism example of the present invention.
Fig. 6 is the skeleton view of the elastic component in the driving force transmission mechanism shown in Figure 3.
Fig. 7 is another example of driving force transmission mechanism of the present invention.
Fig. 8 is another example of driving force transmission mechanism of the present invention.
Fig. 9 is another example of driving force transmission mechanism of the present invention.
Figure 10 is another example of driving force transmission mechanism of the present invention.
Figure 11 is another example of processing unit of the present invention.
Figure 12 is the figure that explanation is used to drive the method for the photosensitive drums of using the axle that does not have unitor.
Figure 13 is the figure that explanation is used to drive the method for the photosensitive drums of using the axle with unitor.
Figure 14 comprises the matrix part that is connected to each other together and the figure of convex unitor partly.
Figure 15 is the figure that the unitor together that is connected to each other is described, this unitor comprises matrix part with polygon cylindricality unitor hole and the convex part with polygon cylindricality unitor projection.
Figure 16 is the figure how matrix part and the convex part of explanation unitor shown in Figure 15 automatically aims at mutually by contacting with each other.
Description of a preferred embodiment
Below in conjunction with description of drawings driving force transmission mechanism of the present invention, image forming apparatus and processing unit.In the following description, will use the label identical with the similar parts of above-mentioned parts with above-mentioned parts.
Below in conjunction with Fig. 1 and 2, the first embodiment of the present invention is described.
The image forming apparatus of this embodiment at first, is described with reference to Fig. 1.Image forming apparatus in the present embodiment is electric photograph coloured image forming device, and it adopts intermediate transfer belt 82.It has the Huang, magenta, green grass or young crops and the black image that be arranged in parallel along the horizontal position of intermediate transfer belt 82 and forms station 1,2,3 and 4.In Fig. 1, symbol Y, M, C and K represent Huang, magenta, green grass or young crops and black respectively.Though in this embodiment image forms the station, and order is set is Y, M, C and K from the left side, also can be the order different with the order of this embodiment.
Image forms station 1-4 and comprises: as photosensitive drums 80Y, 80M, 80C and the 80K of image bearing member; Charging device 86Y, 86M, 86C and 86K; Unshowned exposure device; With corresponding developing apparatus 81Y, 81M, 81C and 81K.
Referring to Fig. 2, photosensitive drums 80Y, 80M, 80C and 80K, charging device 86Y, 86M, 86C and 86K, integrally be arranged in four handle boxes with developing apparatus 81Y, 81M, 81C and 81K and used one to one, four handle boxes are releasably attached in the master component of image forming apparatus by unshowned erecting device.
Photosensitive drums 80Y, 80M, 80C and 80K are recharged device 86Y, 86M, 86C and 86K respectively and charge equably, then form data by unshowned exposure device according to image and form four sub-images one to one at photosensitive drums 80Y, 80M, 80C and 80K.It is four visual ink powder images that four sub-images are developed by developing apparatus 81Y, 81M, 81C and 81K respectively, ink powder image respectively by hierarchically transfer printing of transfer device 87Y, 87M, 87C and 87K (main transfer printing) to intermediate transfer belt 82, intermediate transfer belt 82 rotates along arrow B direction driven rolls 85.Afterwards, four ink powder images on the intermediate transfer belt 82 all are transferred to offset medium as recording medium at second transfer station 83 at once, and recording medium is in the direction of arrow C from paper supply station 90 or 91 outputs.After this, transfer printing the offset medium of whole four ink powder images be passed to fixing device, at fixing device, four ink powder images for good and all are fixed on the full-colour image that becomes permanent fixation above the offset medium.
Still with reference to Fig. 2, the processing unit B in the present embodiment comprises whole interconnective developing cell D and charhing unit C.Developing cell D comprises photosensitive drums 80, developing apparatus and developing device frame 112, and photosensitive drums 80 and developing apparatus integrally are arranged in the developing device frame 112.Charhing unit C comprises charging device 86, charging brush 111, charging device framework 113 etc., and charging device 86 and charging brush 111 integrally are arranged in the charging device framework 113.
Below with reference to Fig. 3, the master component of the image forming apparatus that is provided with drive system is described.
Drive system I comprises: motor 11, driven wheel 12, gear shaft 13 and the second unitor part 14, drive system I is arranged on the equipment master component.When driven wheel 12 is rotated from the driving force of the motor 11 of drive force source, with driven wheel 12 coaxial as the gear shaft 13 of output shaft along with driven wheel 12 rotates.Gear shaft 13 passes the through hole 14a of the second unitor part 14, overlaps with the central shaft of this unitor.The through hole 14a of the partial L of the gear shaft 13 of the fitted around second unitor part 14 and the second unitor part 14 forms the D tee section, promptly remove the basic size part and make partial L pass the shape that through hole 14a is constituted from disk, so the gear shaft 13 and the second unitor part 14 are rotated together.
It is polygon (triangle for example shown in Figure 16) and the hole 50 that is positioned at the second unitor part, 14 1 axial ends that the second unitor part 14 is provided with the cross section.After the second unitor part 14 was installed on the gear shaft 13, the axis in hole 50 overlapped with the pivot center of axle 13.Hole 50 is arranged in the second unitor part 14, and the feasible shape that can change hole 50 easily; Can be by switching the shape that the second unitor part 14 changes hole 50.Also can be independent of the overall diameter of gear shaft 13 and the size in hole 50 is set.
The following describes the system that is driven the II of system or is driven by drive system I.Photosensitive drums 80 (80Y, 80K, 80C and 80K) as driven sleeve member is provided with a pair of drum flange, and drum flange is arranged on vertical end of photosensitive drums 80 one to one.A unshowned drum flange rotatably support photosensitive drums 80.Another drum flange or drum flange 18 integrally comprise polygon cylindricality (for example, having the equilateral triangle tee section) and are assembled to the first unitor part 10 in the hole 50 of the second unitor part 14.In other words, hole 50 is used as a side of unitor, and the first unitor part 10 of polygon cylindricality is made the opposite side of unitor by week.
Below, be driven the II of system and describe selecting to have the above-mentioned hole 50 of equilateral triangle tee section and 10 pairs of unitor parts.
Have the first unitor part 10 of equilateral triangle tee section or be driven in the hole 50 of projection engages on the drive system side on the system side (following will being called " the convex unitor partly enters the engagement of matrix unitor part ") with equilateral triangle tee section.Driven wheel 12, gear shaft 13 and the second unitor part 14 are with rotating from the driving force of motor 11.Partly carry out in the engagement process in hole 50 pack into the hole 10 (following will being called " axle enter the hole engagement ") of drum flange 18, the extension 130 of gear shaft 13 at first unitor.The second unitor part 14 is fixed, and makes that the pivot center of the axis in hole 50 and gear shaft 13 is coaxial, and the axis of the through hole 19 that the extension 130 of gear shaft 13 is passed is coaxial with the axis of the first unitor part 10 with polygon triangular-section shape projection.The cross section in the hole 50 of distortion is similar each other to the cross section of first unitor part with equilateral triangle tee section, all is equilateral triangle.Therefore, when the second unitor part 14 was rotated, the second unitor part 14 contacted with three points with the first unitor part 10 and keeps this to contact (shown in Figure 16 (b)).As a result, photosensitive drums 80 is gone into by equipment master component layback and is fixed on the position of relative equipment master component, and simultaneously, the first unitor part 10 of hole 50 and polygon post is automatically aimed at, thereby makes their axis coaxial each other.In this processing procedure, hole 50 overlaps with the pivot center of gear shaft 13 with the axis of the aligning of the first unitor part 14 of the cylindricality with equilateral triangle tee section.So the automatic axis alignment function of unitor is not disturbed in the engagement that axle enters the hole.Make axle 13 as joint coupling shaft by gear shaft 13 being passed the second unitor part 14, can improve drive system and be driven the precision that the axis of system is aimed at mutually.
Play between the extension 130 of flange 18 and gear shaft 13, be that play between the circumferential surface of extension 130 of the wall of through hole 19 of flange 18 and gear 13 is less than the play between the second unitor part 14 and the first unitor part 10, i.e. play between the sidewall of the wall in the hole 50 of the second unitor part 14 and the first unitor part 10.As a result, photosensitive drums is regulated by the play amount between the extension 130 of flange 18 and gear shaft 13 rather than by the play amount between the second unitor part 14 and the first unitor part 10 in the maximum play amount of its radial direction (below be called " radially ").So, can in fact eliminate by the play amount between the extension 130 that minimizes flange 18 and gear shaft 13 when photosensitive drums 80 velocities of rotation during, because of the radial displacement of the photosensitive drums that external disturbance produced 80 of the contact of for example intermediate transfer belt 82 etc. greater than rated speed, can not disturb the rotation of photosensitive drums 80 in the scope that play reduces between the extension 130 of flange 18 and gear shaft 13, in other words, alignment precision can keep by the play between the extension 130 that minimizes flange 18 and gear shaft 13 between photosensitive drums 80 axis and driving shaft 13 axis.In addition, the play on radial direction can be increased between the first and second unitor parts 14 and 10.Therefore, advance the comfort level in hole 50 by the first unitor part, 10 engagements that increase play between the first and second unitor parts 14 and 10, can increase the polygon post, thereby improve the operability of handle box.
In addition, the extension 130 of gear shaft 13 can be made into taper (part 98 among Fig. 8), so tapering part 98 guiding extension parts 130 are so that through hole 19 can more easily be slipped in extension 130.
Though the first unitor part 10 in the present embodiment is polygon posts simply, the first unitor part 10 also can be the polygon post of distortion, and its twist angle is identical with the twist angle in hole 50.In this case, contact, promptly the interface between two unitors part has the line of torsion rather than the point of contact size greatly with formation.So the power that draw in the power of photosensitive drums, promptly keeps two axles to connect will become bigger.
In this embodiment, driving force transmission mechanism of the present invention is described for driving force is delivered to the driving force transmission mechanism of image forming apparatus photosensitive drums.But it also can be the driving force transmission mechanism that is used for other rotatable parts of non-image forming device photosensitive drums.
In this embodiment, the structure setting is such, and promptly driving force is transmitted from motor 11 through driven wheel 12.But, the output shaft of motor 11 can be directly connected to gear shaft 13, and driven wheel 12 in the middle of needn't inserting.
In addition, in this embodiment, the first unitor part 10 of polygon post is positioned at and is driven side, and second unitor that has through hole 50 partly is positioned at driving side.But, be positioned at the drum flange 18 that is driven side and can be provided with unitor hole 50, and the first unitor part 10 of polygon post is arranged on driving side.This set can provide the effect identical with the present embodiment structure.
Below in conjunction with Fig. 4 the second embodiment of the present invention is described.
In first embodiment, the extension 130 of gear shaft 13 is as the axle of axis hole engagement.But in the present embodiment, the axle that uses in the axis hole engagement is independent of gear shaft 13 and makes.
Referring to Fig. 4, drive system I comprises motor 11, driven wheel 12, gear shaft 13 and the second unitor part 14.The second unitor part 14 is connected with gear shaft 13 connected pieces 90, and the second unitor part 14 is fixed to the bulging side end of web member 90, and web member 90 is as the central shaft of the second unitor part 14.One end of web member 90 is provided with hole 92 and is positioned at the axle collar 94 that is used for accurately locating the second unitor part 14 of bulging side, and the other end of web member 90 is provided with the hole 95 that gear shaft 13 is packed into.Web member 90 usefulness retainers 93 keep gear shaft 13.By remove the web member 90 that the basic size section forms alphabetical D shape as shown in the figure from disk, make the second unitor part 14 rotate with web member 90.
Identical with the second unitor part 14 among first embodiment, the second unitor part 14 in the present embodiment is provided with hole 50.Hole 50 has polygonal cross-section and is positioned at the end of the second unitor part 14 of photosensitive drums 80 sides.Here, the hole 92 of driven wheel 12, gear shaft 13 and web member 90 and 50 dead in line and rotate together.Identical with the second unitor part 14 among first embodiment, the second unitor part 14 is kept, also can be moved along its axis by the pressure that spring 16 produces.
On the other hand, being driven the II of system is a processing unit that can be releasably attached in the image forming apparatus master component.This processing unit comprises photosensitive drums 80, and its each end is equipped with drum flange.The drum flange 18 of faces aperture 50 and the first unitor part, 10 structures are an integral body, and drum flange 18 has the polygon post, also hole 50 is entered in engagement.Drum flange 18 also is provided with axle 91, and the hole 92 of web member 90 and coaxial with the first unitor part 10 of polygon post is entered in axle 91 engagements.The part of axle 91 is stretched out from the end face of the first unitor part 10 of polygon post.The length of this extension of axle 91 is less than the degree of depth in hole 92, so, when photosensitive drums 80 be drawn into when not being equipped with master component, make photosensitive drums 80 its axially on relatively the end face that becomes as the first unitor part 10 of polygon post of the position of equipment master component with the bottom surface in hole 50 contacts, be fixed.By being pressed into drum flange or using cementing agent and axle 91 is fixed to drum flange, axle 91 rotates with drum flange.In addition, the same with first embodiment, the play amount of axle 91 engagement in hole 92 is less than the play amount of convex unitor part in the matrix unitor partly meshes.
The same with first embodiment, use above-mentioned structure setting, can in fact eliminate when photosensitive drums 80 velocities of rotation during, because of the radial displacement of the photosensitive drums that external disturbance produced 80 of the contact of for example intermediate transfer belt 82 etc. greater than rated speed.Alignment precision between photosensitive drums 80 axis and driving shaft 13 axis is held, so make the reduced minimum of driving force transmitting accuracy.In addition, axle 91 end can be made into taper (part 98), so when processing unit is installed, tapering part 98 leading axles 91 make it more easily slip into hole 92.
As the axle 91 among this embodiment, make joint coupling shaft separate then available material joint coupling shaft with fine sliding and intensity with the axle of driving side.The play amount in the axis hole engagement in addition, allows to change joint coupling shaft, so can change by changing joint coupling shaft or adjust easily.
Though the axle 91 in the present embodiment stretches out from the first unitor part 10 of polygon post, axle 91 also can stretch out from the bottom surface in the second unitor part hole 50.This structure setting also can provide the effect identical with the present embodiment structure.
Polygonal first unitor in the present embodiment can be the polygon post of distortion, and is the same with first embodiment, its distortion than with the distortion in hole 50 than identical.
Though in the present embodiment, the first unitor part 10 of polygon post is positioned at and is driven side, and second unitor that is provided with hole 50 partly is positioned at driving side, and their position can be exchanged; Even exchange their position, also can obtain the effect identical with present embodiment.
As mentioned above, in driving force transmission mechanism of the present invention, processing unit and image forming apparatus, sleeve member can enter the engagement of another unitor polygonal hole partly and be connected or break away from drive system by the polygon projection of unitor part.When two unitors partly mesh, from a plurality of interfaces transmission of point or line between the hole wall of the driving force of the drive system polygon projection by the unitor part and the polygonal hole of another unitor part.Be to have the unitor part of polygon projection or be that the unitor with polygonal hole partly is provided with along the axially extended axle of unitor that the unitor that outrigger shaft is not set partly is provided with the hole that can make the outrigger shaft engagement.So, when be driven that side joint receives from the power of driving side outside the power rotating speed during that makes sleeve member greater than fast rotating speed, even the contact between first and second unitors part is disturbed, the sleeve member that is driven on the side still supports with being stabilized.In addition, no matter matrix and convex unitor part, promptly first and second unitors partly between diametrically the play amount how, the alignment precision that drives and be driven between the side can both keep.Therefore thereby can reduce color deviation can provide high-quality image.
Below in conjunction with Fig. 5 the third embodiment of the present invention is described.Drum flange 18 is provided with the sleeve elastic component 5 as brake component that is made of rubber.Describe elastic component 5 in detail in conjunction with Fig. 6.Elastic component 5 is provided with a center pit 6, and hole 6 is through holes, and the extension 130 of gear shaft 13 is engaged in the hole 6.Gear shaft 13 also constitutes the central shaft of unitor.The internal diameter in hole 6 is less than the internal diameter of the through hole 19 of drum flange 18, hole 6 the drum flange 18 that comprises the first unitor part 10 axially on stretch, promptly projection is polygon cylindricality; The internal diameter in hole 6 is such, promptly when the extension 130 of gear shaft 13 is in through hole 19, do not have the play amount between the extension 130 of drum flange 18 and gear shaft 13.In this structure was provided with, when the engagement of the extension 130 of gear shaft 13 was advanced in the hole 6 of elastic component 5, the elastic force of elastic component 5 was compressed extension 130.Like this, when photosensitive drums 80 be subjected to external force, for example be subjected in the middle of during with 82 the power that friction produced, this external force is offset by the friction force between the wall in the extension 130 of gear shaft 13 and hole 6, so the contact condition between matrix and the convex unitor part keeps normal.
Amount of friction between the extension 130 of gear shaft 13 and the wall in hole 6 is determined by two numerical value: the extension 130 of gear 13 and the elasticity number of friction co-efficient value between the elastic component 5 and elastic component 5.Two numerical value are provided with like this, make amount of friction between the wall in the extension 130 of gear shaft 13 and hole 6 submit to but overcome the external force (for example, by the fricative power between photosensitive drums 80 and the intermediate transfer belt 82) that acts on the photosensitive drums 80 as the torque of the gear shaft 13 of output shaft.In this set, the friction with damping force function can not become the first unitor part 10 to the polygon post enter polygonal cross-section second unitor part hole 50 the unitor motion interference and keep first unitor part and the normal unitor of second unitor part.So when photosensitive drums 80 was driven, drive system was aimed at photosensitive drums 80 all the time.
Referring again to Fig. 6, making the edge of opening in the hole 6 that the extension 130 of gear 13 inserts is tapers, and forms tapering part 4.When 130 patchholes 6 of the extension of gear shaft 13, tapering part 4 is as the guide rail of the extension 130 of guide gear wheel shaft 13.It can prevent that also elastic component 5 from being separated from drum flange 18 by the extension 130 of gear shaft 13.
In addition, rotate relative to drum flange 18 in order to prevent elastic component 5, elastic component 5 is provided with planar section, and this planar section is to form by the part of removing the elastic component 5 that equates with the disk sectorial area.As shown in Figure 6, elastic component 5 be provided with a pair of planar section that is parallel to each other 3, in order to regulate elastic component 5, so elastic component 5 moves on prescribed direction only.In this case, drum flange 18 is provided with hole 7, and hole 7 has the cross section of lengthening hole shape, and elastic component 5 is assemblied in the hole 7 and is being parallel to play on the 7 cross section y directions of hole only.
In above-mentioned structure is provided with, in 130 patchholes, 6 processes of the extension of gear shaft 13, when the tapering part 98 of 130 ends, extension contacted with the tapering part 4 in hole 6, the position of elastic component 5 was automatically adjusted so that the extension 130 of gear shaft 13 is assembled in the hole 6.In other words, the hole 6 of gear shaft 13, through hole 19 and elastic component 5 overlaps on axis; Unitor driving side and the problems of missing aim that is driven between the side can be avoided.In addition, elastic component 5 and have play between the wall in hole 7 in elongated hole cross section and make elastic component 5 to move being parallel on this major cross-sectional axis direction.Therefore, elastic component 5 can rotate with drum flange 18 under without any the situation of play on its rotation direction.
Referring again to Fig. 5, the location of elastic component 5 is as far as possible away from polygon projection 10.More specifically, the hole 6 that the location of elastic component 5 makes after polygonal cross-section hole 50 is entered in the first unitor part 10 engagement of polygon post, elastic components 5 are inserted in the extension 130 of gear shaft 13.In this structure, when 130 patchholes 6 of the extension of gear shaft 13, the resistance felt of user is less; The resistance of feeling when inserting the extension 130 of gear shaft 13 can make the user be sure of that polygon projection 10 relative polygonal hole 50 are provided with rightly.
Though first unitor in the present embodiment partly is simple polygon post, first unitor part can be the polygon post of distortion, and its twist angle is identical with the twist angle in the hole 50 of polygonal cross-section.This improvement is changed into line of torsion with contact (boundary) state between two unitor parts from point when driving force is transmitted.In other words, it has increased by two boundary sizes between the unitors part, and the contact that has increased between two unitors parts is pulling to photosensitive drums the power that is produced on the equipment master component direction, thereby has increased and keep the appropriate power that connects of two axles.
In addition, in the present embodiment, the first unitor part 10 of polygon post is positioned at and is driven system side, and the hole 50 of polygonal cross-section is positioned at the drive system side.But the present invention also can be applicable to during structure setting and opposite configuration of the present invention be provided with, and the hole 50 that promptly is applied to polygonal cross-section is arranged in and is driven system side and the first unitor part 10 of polygon post is positioned at the structure of drive system side is provided with.This change can provide the effect identical with the present embodiment structure.
In addition, in the present embodiment, gear shaft 13, more precisely its extension 130 itself is used as joint coupling shaft.But in the extension 130 that does not utilize gear shaft 13 during as joint coupling shaft, one is separated with gear shaft but is set to joint coupling shaft with axle that gear shaft 13 rotates.When using with joint coupling shaft that gear shaft 13 separates, the side that joint coupling shaft is set both can be the first unitor part 10 of polygon post, also can be the second unitor part with polygonal cross-section hole 50.
In the above-mentioned explanation of present embodiment, this embodiment describes at the driving force transmission mechanism that is used for photosensitive drums.But, embodiments of the invention also can be used for the driving force transmission mechanism to the tumbler transmission of drive force of non-photosensitive drums.
In the present embodiment, the part with polygonal hole and the combination as bossing with polygon post are used as the essential part of driving force transmission mechanism.But this combination is not limited to a combination in the present embodiment.In other words, present embodiment can be applicable to comprise the matrix that can be meshing with each other or separate and any driving force transmission mechanism of convex part unitor; The effect that this application provided is identical with the effect of present embodiment.
Below in conjunction with Fig. 7 the fourth embodiment of the present invention is described.In the present embodiment, friction force is used as damping force.
The system II of being driven comprises photosensitive drums 80 and can be releasably attached to processing unit on the image forming apparatus master component.Photosensitive drums 80 is provided with a pair of drum flange one to one at its vertical end.In two flanges, drum flange 18, promptly be one and be engaged in the polygonal hole 50 in the face of flange in polygonal cross-section hole 50 and the first unitor part, 10 structures of polygon post.
The drum flange 18 that comprises the first unitor part 10 of polygon post is provided with through hole 19, and through hole 19 is along the extending longitudinally that comprises the drum flange 18 of the first unitor part 10, and gear shaft 13 passes through hole 19.The dead in line of the axis of through hole 19 and the first unitor part 10.Relatively the inner of the drum flange 18 of photosensitive drums 80 is provided with the elastic component 31 of a pair of for example spring, and elastic component 31 is installed in that mode on the drum flange makes when through hole 19 is passed in the extension 130 of gear shaft 13, the elastic force of elastic component 31 is pressed on the extension 130 elastic component 31.Utilize unshowned device that elastic component 31 is fixed to drum flange 18.In this structure is provided with, photosensitive drums 80 for example is subjected to the external force by the power that friction produced of intermediate transfer belt 82, this external force is offset by the friction between the extension 130 of gear shaft 13 and the elastic component 31, so matrix can keep contacting rightly with convex unitor part each other.
Be arranged to make this friction to yield to as the amount of friction between the extension 130 of the gear shaft 13 of unitor central shaft but can overcome the external force that acts on the photosensitive drums 80 power that friction produced of intermediate transfer belt (for example, by) as the torque of the gear shaft 13 of output shaft.In this set, the normal engaged in the friction of damping force first unitor part 10 that does not influence the polygon post and the hole 50 with polygonal cross-section is provided and keeps matrix and mutual appropriate contact of convex unitor part.Therefore, photosensitive drums 80 is normally driven by drive system I all the time.
In the present embodiment, two extensions 130 that elastic component 31 is clamped gear shaft 13.But elastic component 31 is not limited in above-mentioned quantity and position.
In the present embodiment structure of driving force transmission mechanism make the first unitor part 10 at the polygon post be engaged in the hole 50 of polygonal cross-section after, the extension 130 of gear shaft 13 contacts with elastic component 31.In this structure is provided with, when the extension 130 of gear shaft 13 contacts with elastic component 31, the resistance felt of user is less; The resistance of feeling when inserting the extension 130 of gear shaft 13 can make the user be sure of that polygon projection 10 relative polygonal hole 50 are provided with rightly.
In addition, in the present embodiment, first unitor partly is simple polygon post.But first unitor part can be the polygon post of distortion, and the same with first embodiment, its twist angle is identical with the twist angle in the hole 50 of polygonal cross-section.In addition, for the first unitor part 10 that is provided with the polygon post or have a side of the second unitor part 14 in polygonal cross-section hole 50, identical with the practice of first embodiment, the first unitor part 10 is set and the second unitor part 14 is set for being substituted in the drum flange side, can the first unitor part 10 is set and the second unitor part 14 is set in the gear shaft side in the drum flange side in the gear shaft side.The first and second unitor parts 10 can provide the effect identical with original position with 14 opposite location.
In addition, in the present embodiment, gear shaft 13 itself, more precisely its extension 130 itself is used as joint coupling shaft.But, identical with the change among first embodiment, available separate and replace with the extension 130 of gear shaft 13 as joint coupling shaft with gear shaft 13 with axle that gear shaft 13 rotates make joint coupling shaft.
In the above-mentioned explanation of present embodiment, have the driving force that the projection of the parts in distortion hole of polygonal cross-section and polygon post is used separately as in the driving force transmission mechanism and transmit side and driving force receiver side.But, the driving force of driving force transmission mechanism transmission side and driving force receiver side need not to be the version in the present embodiment.As long as the driving force transmission mechanism use matrix and convex unitor part as drive system with the geared assembly that is driven system and keep mutual appropriate the contact, just can obtain the effect identical with present embodiment.
Below in conjunction with Fig. 8 the fifth embodiment of the present invention is described.In the present embodiment, magnetic force is as damping force.Drive system in the present embodiment and the system that is driven are in fact with the drive system of the 3rd embodiment with to be driven system identical.Therefore, with the explanation of omitting, and only the part different with the 3rd embodiment described them.
Referring to Fig. 8, drum flange 18 has the tubular magnetized element 201 that is arranged in its hollow parts.Magnetized element 201 is provided with through hole 202, the dead in line of the axis of through hole 202 and magnetized element 201, and the extension 130 of gear shaft 13 is assemblied in the through hole 202.The diameter in hole 202 can be greater than the external diameter of the extension 130 of gear shaft 13; More precisely, it can be even as big as providing certain play amount between the extension 130 of hole 202 and gear shaft 13.On the other hand, gear shaft 13 is made by magnetic material.
In above-mentioned structure is provided with, part 201 magnetization that is magnetized of the extension 130 of gear shaft 13, so, in the face of the magnetization polarity of the part of the extension 130 of the gear shaft 13 of magnetized element 201 opposite with the polarity of the magnetized element 201 of the extension 130 of facing gear shaft 13.As a result, act on magnetic force between the wall in the extension 130 of gear shaft 13 and hole 202 with the mode effect of the extension 130 of brake tooth wheel shaft 13.So, when external force, when for example being used on the photosensitive drums 21 by the masterpiece that friction produced of intermediate transfer belt 82, external force is applied in the extension 130 of gear shaft 13 and the magnetic force between the hole 202 and offsets, and therefore, the contact condition between matrix and the convex unitor part keeps normal.
Here, the magnetic force that acts between the extension 130 of gear shaft 13 is set in the scope, in this scope, magnetic force is yielded to as the torque of the gear shaft 13 of output shaft but is overcome the external force that the acts on photosensitive drums 21 fricative power of intermediate transfer belt 32 (for example, by).
In above-mentioned structure is provided with, provide the magnetic force of damping force to make the unitor part in hole 50 keep the normal normal engaged that contacts and can not influence the first unitor part 10 and hole 50 with the first unitor part 10 of polygon post with polygonal cross-section.So the drive system that photosensitive drums 21 is connected to photosensitive drums 21 all the time rightly drives.
Though, magnetized element 201 in the present embodiment is the cylindrical member with through hole 202, but as long as they can provide magnetic attraction or damping force between the extension 130 of magnetic part 201 and gear shaft 13, then the structure of magnetic part 201 and position are also limited by present embodiment needn't.
In addition, magnetic part 201 also is provided with the part that prevents that magnetic part 201 from rotating relative to drum flange 18.This part of magnetic part 201 prevents that with for example rotation of elastic component 5 shown in Figure 6 the structure of part is identical.
Polygon projection in the present embodiment can be the distortion polygon projection among first embodiment, and its twist angle is identical with the twist angle in the hole 50 with polygonal cross-section.In drive system be driven on the side between the system, polygon projection 10 can be set and have the hole 50 of polygonal cross-section, they are arranged on the both sides as first embodiment one to one.Even their position is opposite with present embodiment, also can provides with the present embodiment structure identical effect is set.
In the 5th embodiment, gear shaft 13 itself, more precisely its extension 130 itself is used as joint coupling shaft.But, available with gear shaft 13 separate and the magnetic axle that rotates with gear shaft 13 as joint coupling shaft.
In the above-mentioned explanation of present embodiment, the projection with the parts in distortion hole of polygonal cross-section and polygon post is selected as the both sides of unitor in the driving force transmission mechanism.But, as long as the unitor of driving force transmission mechanism uses matrix and the convex unitor part that is meshing with each other, separates or keep in touch mutually, then can obtain the same effect that provides with present embodiment.
Below in conjunction with Fig. 9 the sixth embodiment of the present invention is described.In the present embodiment, damping force only works in one direction.Drive system I structure is identical with first embodiment, so omit the explanation to it.In addition, drive system II is in fact identical with the 3rd embodiment, so the part that drive system II is different with the 3rd embodiment only is described.
Referring to Fig. 9, drum flange 18 has and is positioned at the hollow cylindrical member 302 of drum flange 18.Cylindrical member 302 has three-decker, comprises the internals 302a, unidirectional coupling 301 and the outermost spare 302b that are arranged in order from the central shaft side.Internals 302a is provided with center pit 303, and the extension 130 of gear shaft 13 is engaged in the hole 303.Relation between the extension 130 of hole 303 and gear shaft 13 makes can not play between the extension 130 of the wall in hole 303 and gear shaft 13.Gear shaft 13 can rotate with internals 302a.On the other hand, outermost spare 302b is provided with and prevents that outermost spare 302b from rotating and making the mechanism (Fig. 6) of the directed play of outermost spare 302b.
In above-mentioned structure was provided with, when hole 303 was entered in 130 engagements of the extension of gear shaft 13, the position of cylindrical member 302 can automatically be adjusted.Therefore, can avoid the problem that when driven shaft on the skew is connected to driving shaft, produces.Unidirectional coupling 302 is adjusted the rotation direction of gear shaft 13, rotates so that gear shaft 13 can be gone up at driving direction (direction of arrow E).In other words, carry out control so that outermost spare 302b rotates in the direction of arrow F relative to the internals 302a that rotates with gear shaft 13.That is, are shear lines as unidirectional coupling 301, allowing to be driven the direction that side is rotated, internals 302a and outermost spare 302b shear mutually in the direction of arrow E and F respectively.
On the contrary, the rotating speed that makes photosensitive drums 80 because of the external force such as the fricative power between photosensitive drums 80 and the intermediate transfer belt 82 is the arrow G indicated direction greater than the direction of normal speed.Outermost spare 302b rotates with flange 18.When external force act on photosensitive drums 80 in the direction and the rotating speed that makes photosensitive drums 80 greater than along the normal speed of arrow G direction the time, external force also along the directive effect of arrow G at outermost spare 302b.But, in this case, the part of rotating along arrow E and G direction mutual shearing unlike the part of rotating along arrow E and F direction respectively respectively.So when external force acts on photosensitive drums 80 and the rotating speed that makes photosensitive drums 80 during greater than normal speed in the direction, damping force is applied by unidirectional coupling 301.In other words, the external force of a structure setting negative function on photosensitive drums 80 in the present embodiment (for example, fricative external force because of intermediate transfer belt 82), do not influence normal contact the between the first unitor part 10 of second unitor part with polygonal hole 50 and polygon post.So the matrix of driving force transmission mechanism unitor keeps normally contacting with the convex part each other.In other words, photosensitive drums 80 is driven system drive with normal connection status all the time.
In addition, the drive transmission mechanism in the present embodiment be arranged so that after the first unitor part 10 of polygon post is engaged in the hole 50 with polygonal cross-section, the extension 130 of gear shaft 13 is engaged in the hole 303.When this structure can make extension 130 patchholes 303 of gear shaft 13, the resistance felt of user is less; The resistance of feeling when inserting the extension 130 of gear shaft 13 can make the user be sure of that polygon projection 10 relative polygonal hole 50 are provided with rightly.
In the present embodiment, first unitor partly is simple polygon post.But first unitor part can be the polygon post of distortion, and the same with first embodiment, its twist angle is identical with the twist angle in the hole 50 of polygonal cross-section.In addition, have the first unitor part 10 of polygon post and have polygonal cross-section hole 50 and be arranged on drive system and be driven on the side between the system, they are identical with the practice of first embodiment, are arranged on the both sides one to one.Even the position opposite in their position and the present embodiment also can obtain the effect identical with present embodiment.
In the present embodiment, gear shaft 13 itself, more precisely its extension 130 itself is used as joint coupling shaft.But, identical with the change among first embodiment, available separate and replace with the extension 130 of gear shaft 13 as joint coupling shaft with gear shaft 13 with axle that gear shaft 13 rotates make joint coupling shaft.
In the above-mentioned explanation of present embodiment, the projection with the parts in distortion hole of polygonal cross-section and polygon post is selected as the both sides of unitor in the driving force transmission mechanism.But, as long as the unitor of driving force transmission mechanism uses matrix and the convex unitor part that is meshing with each other and keeps in touch mutually, just can obtain the effect identical with present embodiment.
Below in conjunction with Figure 10 the seventh embodiment of the present invention is described.In the present embodiment, damping force utilizes powder brake to provide.Drive system I in the present embodiment is with to be driven the II of system identical with the 6th embodiment.So, below will be not to except that with the 6th embodiment in the different part drive system I and be driven the II of system and describe.
Referring to Figure 10, drum flange 18 has the cylindrical member 502 that is positioned at its space.Cylindrical member 502 has three-decker, comprises the internals 502a, powder brake 501 and the outermost spare 502b that are arranged in order from the central shaft side.Internals 502a is provided with center pit 503, and the extension 130 of gear shaft 13 is engaged in the hole 503.Relation between the extension 130 of hole 503 and gear shaft 13 makes can not play between the extension 130 of the wall in hole 503 and gear shaft 13.Gear shaft 13 can rotate with internals 502a.So, acting on the photosensitive drums 80 such as external force by the fricative power of intermediate transfer belt 82, this external force is offset by the damping force that the powder brake 501 between corresponding interior and outermost spare 502a and 502b is applied.Therefore, the matrix of driving force transmission mechanism keeps normally contacting with the convex part mutually.
The damping force of powder brake 501 is arranged in the scope of yielding to as gear shaft 13 torques of output shaft, but can overcome the external force that acts on the photosensitive drums 21 power that friction produced of intermediate transfer belt (for example, by).In above-mentioned structure was provided with, the hole 50 that the damping force that powder brake 501 provides can keep having polygonal cross-section contacted with first the normal of unitor part 10 of polygon post, and does not influence the normal engaged of the first unitor part 10 in hole 50.Therefore, photosensitive drums 80 is all the time by the drive systems that is connected to photosensitive drums 80 rightly.
Outermost spare 502b is provided with and prevents that outermost spare 502b from rotating and making the mechanism (Fig. 6) of the directed play of outermost spare 502b.
In above-mentioned structure was provided with, when 130 patchholes 503 of the extension of gear shaft 13, the position of cylindrical member 502 was automatically adjusted.So the problem that can avoid driven axle when unitor point on the skew is connected to driving shaft, to be produced.
In addition, the driving force transmission mechanism of present embodiment be arranged so that after the first unitor part 10 of polygon post is engaged in the hole 50 with polygonal cross-section, the extension 130 of gear shaft 13 is engaged in the hole 503.This structure setting can reduce the resistance that the user feels when the extension 130 of gear shaft 13 is engaged in the hole 503, and the resistance that the user is felt when processing unit is installed can be used as the relative rightly polygonal hole 50 of polygon projection 10 and the guarantee of setting.
In the present embodiment, first unitor partly is simple polygon post.But first unitor part can be the polygon post of distortion, and the same with first embodiment, its twist angle is identical with the twist angle in the hole 50 of polygonal cross-section.In addition, have the first unitor part 10 of polygon post and have polygonal cross-section hole 50 and be arranged on drive system and be driven on the side between the system, they are identical with the practice of first embodiment, are arranged on the both sides one to one.Both made their position and the position opposite in the present embodiment, also can obtain the effect identical with present embodiment.
In addition, in the present embodiment, gear shaft 13 itself, more precisely its extension 130 itself is used as joint coupling shaft.But, available separate and replace with the extension 130 of gear shaft 13 as joint coupling shaft with gear shaft 13 with axle that gear shaft 13 rotates make joint coupling shaft.
In the above-mentioned explanation of present embodiment, the projection with the parts in distortion hole of polygonal cross-section and polygon post is selected as the both sides of unitor in the driving force transmission mechanism.But, as long as the unitor of driving force transmission mechanism uses matrix and the convex unitor part that is meshing with each other and keeps in touch mutually, just can obtain the effect identical with present embodiment.
As mentioned above, in driving force transmission mechanism of the present invention, processing unit and image forming apparatus, the unitor of driving force transmission mechanism comprises matrix part and convex part, they are fixed on one of the image forming apparatus master component vertically one of cylindrical member vertical end in end and the processing unit one to one, are delivered to cylindrical member from the driving force of output shaft by the point between matrix or the convex part or a plurality of boundaries of face.Parts in matrix part or the convex part are provided with along the side gear shaft on the image forming apparatus master component side to the axle that extends, another parts, the parts that promptly are not provided with outrigger shaft are provided with the mechanism that damping force is provided, and damping force acts on the hole wall and outrigger shaft of matrix part along the hole wall of matrix part and the circumferencial direction of outrigger shaft.So, both made the side that is driven of driving force transmission mechanism be subjected to non-transmission power of coming the driving side of self drive transmission mechanism, contact between matrix and the convex part also remains normal contact condition, and total energy assurance driving force is delivered to satisfactorily and is driven side, and makes colour cast from minimizing.Therefore can provide high-quality image.
Embodiment 8
In the present embodiment or the eighth embodiment of the present invention, central shaft passes the driving force transmitting portions, damping force be applied to the central shaft structure for one the axle, so that more firm driving force transmission mechanism to be provided.This structure setting as shown in figure 11 is the cut-open view that is used for the processing unit of present embodiment unitor 100.
The photosensitive drums 80 that can be releasably attached on the image forming apparatus master component with processing unit 100 is provided with drum flange 18b and the 18d that are installed in 80 liang of vertical ends of photosensitive drums one to one.Drum flange 18b is provided with the first unitor part 10 that the equipment rear side of being positioned at is used for the polygon post of transmission of drive force.Drum flange 18d is positioned at equipment front side and non-transmission of drive force.Drum flange 18b and 18d are equipped with the center pit of placing drum axle 130a.Drum flange 18b is provided with hole 19, and the driving shaft 13 on the equipment master component side passes hole 19.When photosensitive drums 80 was rotated, drum axle 130a and drum flange 18b and 18d rotated with photosensitive drums 80.In other words, photosensitive drums 80 is rotated relative to the axis of drum axle 130a.
The front end of drum axle 130a is supported by bearing 2e, and bearing 2e is fixed to bearing seat 2c.Bearing seat 2c is fixed to the framework 59 of processing unit 100.
When processing unit 100 inserts image forming apparatus, also the unitor of constitution equipment master component side partly is inserted into the hole 19 of drum flange 18b, drum axle 130a and central shaft 13 are rotated together, and the relative equipment master component of the center of rotation of photosensitive drums 80 is located rightly.Simultaneously, the second unitor part 14 with hole of equipment master component side is advanced in the first unitor part, 10 engagements that are provided with drum flange 18b, so that photosensitive drums 80 drives with being rotated.The first unitor part 10 of polygon post can not only transmission of drive force, can also produce the power that photosensitive drums 80 is pulled to the equipment master component along the direction of central shaft 13 when driving force is delivered to this first unitor part 10.
The back plate 65 of image forming apparatus is provided with the fulcrum post 63 to processing unit 100 location; When fulcrum post inserted the framework 68 of processing unit 100, the position of the framework 68 of processing unit 100 was fixed.
On the other hand, be fixed to the non-drum flange 18d that is driven on the side of being positioned at of photosensitive drums 80 front sides and be provided with groove, its bottom is provided with rib 2d1.In addition, be driven on the side, be provided with the torque limiter 2h that is used for applying the scheduled volume load to drum axle 130a along the circumferencial direction of photosensitive drums as the load generation device non-.Torque limiter 2h is pressed into rib 2d1 by the end with it and is fixed to the non-drum flange 18d that is driven on the side.The other end, be torque limiter 2h at a non-end that is driven on the side, apply part 2i as thrust and be fixed at the axial generation pressure of drum axle 130a.Thrust applies part 2i and is provided with tapering part 2i1, and tapering part 2i1 has the rib of the equidistant location of the axis symmetry of drum axle 130a relatively.In above-mentioned structure was provided with, the load of scheduled volume was applied to a drum axle 130a by the torque limiter 2h that is fixed to drum flange 18d along the circumferencial direction of photosensitive drums 80.So, both made processing unit 100 be subjected to the external force of non-driving force from the equipment master component, the both sides of driving force transmitting portions unitor also can keep the normal contact condition of transmission of drive force satisfactorily, therefore color deviation are minimized.So, can obtain high-quality image.
Though first unitor in the present embodiment partly is simple polygon post, identical with first unitor improvement partly in the previous embodiment, it also can be the polygon post of distortion.Polygon post and polygonal hole can be positioned at the driving side of unitor respectively and be driven side, or be positioned at unitor be driven side and driving side; Even polygon post and polygonal hole is out of position, it is identical that the effect that provides with present embodiment also can be provided.In other words, the unitor part that offers processing unit 100 can be polygon post or polygonal hole.
Though in conjunction with structure disclosed herein the present invention has been described, the present invention is not limited to these specific descriptions, and the application will cover those improvement or the variation that may be included in the claim scope in the improvement purpose or following.
Claims (48)
1. drive transmission device, it comprises:
The first unitor part, it has polygon;
The second unitor part, it has the bore portion of cross section structure greater than described first unitor part, and described bore portion can partly mesh with described first unitor; With
Central shaft, it is arranged on described first unitor part or described second unitor part, and described central shaft passes another in described first and second unitors part.
2. device as claimed in claim 1, wherein, described first unitor partly receives the driving force from described second unitor part.
3. device as claimed in claim 1, wherein, what described second unitor part can be along described central shaft moves axially and is provided with the thrust unit that is used for along described second unitor part of the axial promotion of described central shaft.
4. device as claimed in claim 1, wherein, described central shaft has pyramidal structure in the end.
5. device as claimed in claim 1, wherein, described first unitor partly has the distortion projection of polygonal cross-section.
6. device as claimed in claim 1, wherein, the bore portion of described second unitor part has polygonal cross-section.
7. as claim 5 or 6 described devices, wherein, the described polygon of described second unitor part. twist in the hole.
8. device as claimed in claim 1, wherein, described central shaft can integrally rotate with described first and second unitors part.
9. device as claimed in claim 8 also comprises and can act on clamping device on this central shaft along described central shaft circumferencial direction.
10. device as claimed in claim 9, wherein, described clamping device applies friction force to described central shaft.
11. device as claimed in claim 10, wherein, described friction force is by applying with the elastic component that described central shaft contacts.
12. device as claimed in claim 9, wherein, described clamping device is a powder brake.
13. device as claimed in claim 9, wherein, described clamping device provides torque.
14. device as claimed in claim 9, wherein, described clamping device comprises the magnetic force bringing device that is used for described central shaft is applied magnetic force.
15. an image forming apparatus, it comprises:
Sensitive piece;
Charging device, it gives described sensitive piece charging;
Image processing system, it forms electrostatic image on by the sensitive piece of described charging part charging;
Developing apparatus, it develops to electrostatic image;
Transfer device, it is transferred to recording materials with the image that developing apparatus develops;
Drive source;
Driver, it is delivered to described sensitive piece with driving force from described drive source;
The first unitor part, it has polygon;
The second unitor part, it has the bore portion of cross section structure greater than described first unitor part, and described bore portion can partly mesh with described first unitor;
Central shaft, it is arranged on described first unitor part or the second unitor part, and described central shaft passes a part in described first and second unitors part;
Wherein, described sensitive piece has a part in described first unitor part and second unitor part, and described driver is as another unitor part.
16. equipment as claimed in claim 15, wherein, described first unitor part partly receives driving force from described second unitor.
17. equipment as claimed in claim 15, wherein, described sensitive piece utilizes the described relatively image forming apparatus of described central shaft correctly to position.
18. equipment as claimed in claim 15, wherein, described central shaft has pyramidal structure in the end.
19. equipment as claimed in claim 15, wherein, described first unitor partly has the distortion projection of polygonal cross-section.
20. equipment as claimed in claim 15, wherein, the bore portion of described second unitor part has polygonal cross-section.
21. equipment as claimed in claim 15, wherein, the described polygonal hole of described second unitor part is twisted.
22. equipment as claimed in claim 15, wherein, described central shaft can integrally rotate with described first and second unitors part.
23. equipment as claimed in claim 15 also comprises and can act on clamping device on this central shaft along described central shaft circumferencial direction.
24. equipment as claimed in claim 23, wherein, described clamping device applies friction force to described central shaft.
25. equipment as claimed in claim 24, wherein, described friction force is by applying with the elastic component that described central shaft contacts.
26. equipment as claimed in claim 23, wherein, described clamping device is a powder brake.
27. equipment as claimed in claim 23, wherein, described clamping device provides torque.
28. equipment as claimed in claim 23, wherein, described clamping device comprises the magnetic force bringing device that is used for described central shaft is applied magnetic force.
29. equipment as claimed in claim 15, wherein, described transfer device comprises the intermediate transfer part.
30. equipment as claimed in claim 15, wherein, described sensitive piece is a part that comprises the unit that acts on the treating apparatus on the described sensitive piece.
31. equipment as claimed in claim 30, wherein, described treating apparatus comprises described charging device, described developing apparatus at least and is used for cleaning a device of the described cleaning device of sensitive piece.
32. the processing unit that can be releasably attached on the image forming apparatus with drive part, described processing unit comprises the treating apparatus that can act on the sensitive piece, and described treating apparatus comprises:
The first unitor part, it has polygon, also can mesh with the drive part of equipment master component;
Bore portion, it and the central shaft engagement of passing the mate between described first unitor part and the driver.
33. processing unit as claimed in claim 32, wherein, described processing unit utilizes the described relatively image forming apparatus of described central shaft correctly to position.
34. processing unit as claimed in claim 32, wherein, described central shaft has pyramidal structure in the end.
35. processing unit as claimed in claim 32, wherein, described first unitor partly has the projection of polygonal cross-section.
36. processing unit as claimed in claim 35, wherein, described polygon partly twists.
37. processing unit as claimed in claim 32, wherein, described first unitor partly has the bore portion of polygonal cross-section.
38. processing unit as claimed in claim 37, wherein, described bore portion twists.
39. processing unit as claimed in claim 32, wherein, described central shaft can integrally rotate with described first unitor part.
40. processing unit as claimed in claim 39 also comprises and can act on clamping device on this central shaft along described central shaft circumferencial direction.
41. processing unit as claimed in claim 40, wherein, described clamping device applies friction force to described central shaft.
42. processing unit as claimed in claim 41, wherein, described friction force is by applying with the elastic component that described central shaft contacts.
43. processing unit as claimed in claim 40, wherein, described clamping device is a powder brake.
44. processing unit as claimed in claim 40, wherein, described clamping device provides torque.
45. processing unit as claimed in claim 40, wherein, described clamping device comprises the magnetic force bringing device that is used for described central shaft is applied magnetic force.
46. processing unit as claimed in claim 32 also comprises sensitive piece.
47. processing unit as claimed in claim 46, wherein, described first unitor partly is arranged on the described sensitive piece.
48. processing unit as claimed in claim 32, wherein, described processing unit comprises described charging device, described developing apparatus at least and is used for cleaning a device of the described cleaning device of sensitive piece.
Applications Claiming Priority (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP320945/2000 | 2000-10-20 | ||
| JP2000320945A JP3762211B2 (en) | 2000-10-20 | 2000-10-20 | Image forming apparatus |
| JP333198/2000 | 2000-10-31 | ||
| JP2000333198 | 2000-10-31 | ||
| JP342354/2000 | 2000-11-09 | ||
| JP2000342354A JP3720698B2 (en) | 2000-11-09 | 2000-11-09 | Driving force transmission mechanism, process cartridge, and image forming apparatus |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN01143320A Division CN1356602A (en) | 2000-10-20 | 2001-10-19 | Drive for transfer mechanism, imaging device and the processing unit of said device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1763638A true CN1763638A (en) | 2006-04-26 |
| CN1763638B CN1763638B (en) | 2010-06-09 |
Family
ID=18799150
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200510097878 Expired - Fee Related CN1763638B (en) | 2000-10-20 | 2001-10-19 | Image forming apparatus |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP3762211B2 (en) |
| CN (1) | CN1763638B (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102981386A (en) * | 2011-09-05 | 2013-03-20 | 佳能株式会社 | Cartridge and image forming apparatus |
| CN103279023A (en) * | 2006-12-22 | 2013-09-04 | 佳能株式会社 | Process cartridge, electrophotographic image forming apparatus, and electrophotographic photosensitive drum unit |
| CN103293909A (en) * | 2012-02-22 | 2013-09-11 | 株式会社理光 | Development device, and image forming apparatus and process cartridge |
| US10022194B2 (en) | 2008-09-30 | 2018-07-17 | Intuitive Surgical Operations, Inc. | Passive preload and capstan drive for surgical instruments |
| US10478163B2 (en) | 2008-09-30 | 2019-11-19 | Intuitive Surgical Operations, Inc. | Medical instrument engagement process |
| CN112805568A (en) * | 2018-10-01 | 2021-05-14 | 勃林格殷格翰维特梅迪卡有限公司 | Analyzer for testing a sample |
| US12023114B2 (en) | 2022-06-28 | 2024-07-02 | Intuitive Surgical Operations, Inc. | Passive preload and capstan drive for surgical instruments |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5749028A (en) * | 1996-06-26 | 1998-05-05 | Xerox Corporation | Multi-size photoreceptor flange bearing |
| JP3689504B2 (en) * | 1996-09-26 | 2005-08-31 | キヤノン株式会社 | Electrophotographic image forming apparatus |
-
2000
- 2000-10-20 JP JP2000320945A patent/JP3762211B2/en not_active Expired - Fee Related
-
2001
- 2001-10-19 CN CN 200510097878 patent/CN1763638B/en not_active Expired - Fee Related
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| US10671018B2 (en) | 2006-12-22 | 2020-06-02 | Canon Kabushiki Kaisha | Process cartridge, electrophotographic image forming apparatus, and electrophotographic photosensitive drum unit |
| US10551793B2 (en) | 2006-12-22 | 2020-02-04 | Canon Kabushiki Kaisha | Process cartridge, electrophotographic image forming apparatus, and electrophotographic photosensitive drum unit |
| US10585391B2 (en) | 2006-12-22 | 2020-03-10 | Canon Kabushiki Kaisha | Process cartridge, electrophotographic image forming apparatus, and electrophotographic photosensitive drum unit |
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| US11547503B2 (en) | 2008-09-30 | 2023-01-10 | Intuitive Surgical Operations, Inc. | Passive preload and capstan drive for surgical instruments |
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| US9188945B2 (en) | 2011-09-05 | 2015-11-17 | Canon Kabushiki Kaisha | Cartridge and image forming apparatus |
| CN102981386B (en) * | 2011-09-05 | 2015-06-03 | 佳能株式会社 | Cartridge and image forming apparatus |
| CN102981386A (en) * | 2011-09-05 | 2013-03-20 | 佳能株式会社 | Cartridge and image forming apparatus |
| CN103293909A (en) * | 2012-02-22 | 2013-09-11 | 株式会社理光 | Development device, and image forming apparatus and process cartridge |
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| US12023114B2 (en) | 2022-06-28 | 2024-07-02 | Intuitive Surgical Operations, Inc. | Passive preload and capstan drive for surgical instruments |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3762211B2 (en) | 2006-04-05 |
| CN1763638B (en) | 2010-06-09 |
| JP2002130312A (en) | 2002-05-09 |
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