CN203299516U

CN203299516U - Photosensitive drum for laser printer

Info

Publication number: CN203299516U
Application number: CN2013203740437U
Authority: CN
Inventors: 杨晓锋; 赖亚勇
Original assignee: Print Rite Unicorn Image Products Co Ltd
Current assignee: Print Rite Unicorn Image Products Co Ltd
Priority date: 2013-06-26
Filing date: 2013-06-26
Publication date: 2013-11-20
Anticipated expiration: 2023-06-26

Abstract

The utility model relates to a photosensitive drum for a laser printer. The photosensitive drum comprises a photosensitive component and a transmission component. The transmission component is fixed on one side of the photosensitive component along the length direction. A cylindrical stressed block is arranged at one end of the transmission component turning the back to the photosensitive component along the length direction of the photosensitive component. Blind holes recessed along the self axial direction are arranged on an outer end wall of the stressed block turning the back to the photosensitive component along the self axial direction. The blind holes are provided with continuous hole walls on the axial cross section of the stressed block, and the number of the blind holes is four. On the axial cross section of the stressed block, the four blind holes are in symmetrical distribution relative to the radial center of the stressed block. The stressed block of the photosensitive drum is aligned with a laser printer driving head accurately, and needed rotating driving force can be obtained from the laser printer stably.

Description

Light sensitive drum for laser printer

Technical field

The utility model relates to the component parts photosensitive drums as laser printer.This photosensitive drums consists of photosensitive part and drive disk assembly.

Background technology

Imaging process take handle box 100 as the laser printer of basic comprising core is, sees Fig. 1, charged equably by charging roller 102 in photosensitive drums 101 surfaces.Laser scanner 103 contains image information and through the laser beam 104 of ovennodulation to photosensitive drums 101 external cylindrical surfaces emissions, form its distribution at the cylindrical surface of photosensitive drums 101 and deposit discrepant static charge distribution plan after laser beam 104 irradiation, that is the electrostatic latent image corresponding with image to be copied.Afterwards, the developer of carbon dust 106 that autography roller 105 transmits and so on is under the state of regulating bed thickness through powder outlet cutter 113 then be adsorbed on the cylindrical surface of photosensitive drums 101, after aforementioned electrostatic latent image was covered, it is converted to can macroscopic visual image.Along with the rotation of photosensitive drums 101, the visual image that is formed at photosensitive drum surface by carbon dust 106 replaces to the position at transfer roll 107 places.Effect through the entrained transfer voltage of transfer roll 107, the carbon dust of visual image form is transferred on the surface of the recording mediums 108 such as paper, after heating pressurization with the carbon dust of the visual image form by on warm-up

mill

111 and 112 pairs of recording mediums 108 of backer roll, carbon dust is penetrated in the fibrage of recording medium 108, and the visual image that carbon dust is formed for good and all solidifies on recording medium 108.Visual image on aforementioned photosensitive drums 101 is after being transferred roller 107 transfer printings, residual carbon dust 109 attached to it is struck off to useless powder collecting bin by useless powder scraping blade 110, and photosensitive drums 101 surfaces return to without the dustless stand-by state of electricity after the corresponding electric equipment that disappears is eliminated static.So just completed a basic imaging workflow.The result of this flow process iterative cycles running, just can obtain the needed image of printing person.

For above-mentioned handle box 100, different manufacturers can be according to function, serviceable life and the construction features etc. of handle box 100 each component parts, in conjunction with oneself research and development pattern making, go out the different product of integrated level.For example, the developer roll 105 of bearing developing function, the component integrations such as powder storehouse bearing the powder outlet cutter 113 of regulating carbon dust bed thickness function and bear developer storage, supplying functional are Delevoping cartridge independently.Such Delevoping cartridge has storage powdery type developer and developer is transported to photosensitive drums 101 surfaces, the effect that electrostatic latent image is developed.101 of photosensitive drums directly are disposed in laser printer in advance, and perhaps for example charging roller 102 and useless powder scraping blade 110 are disposed in laser printer after combining separately the electrophotographic image forming unit again with other parts.

The course of work of aforementioned laser printer, no matter photosensitive drums 101 is pre-configured in laser printer, or be disposed in laser printer after assembly separately with other parts again, and the formation of its visual image all depends on the continuous rotation of photosensitive drums 101.Under this working method, the rotation of photosensitive drums 101 depends on the rotary driving force of laser printer generation and the drive disk assembly 115 of bearing this driving force transformation task.

Referring to Fig. 2,3,4, the basic comprising of photosensitive drums 101 comprises photosensitive part 114 and drive disk assembly 115.The general hollow cylinder that adopts aluminium to prepare of photosensitive part 114 is that aluminum barrel is basic building block.Be coated with photosensitive material on the external cylindrical surface of aluminum barrel.An axial end at aluminum barrel is equiped with drive disk assembly 115.Drive disk assembly 115 passes to photosensitive drums 101 with the rotary driving force that laser printer produces, and makes photosensitive drums 101 produce rotation.

The structural feature of drive disk assembly 115 is rendered as right cylinder substantially.Be provided with driven wheel 116 on this cylindrical external cylindrical surface.Driven wheel 116 can pass to developer roll 105 parts such as grade (consulting Fig. 1) to the rotary driving force that drive disk assembly 115 obtains., in order from laser printer, to obtain rotary driving force, at drive disk assembly 115, along self, axially back to an end of photosensitive part 114, be provided with cylindrical force block 117.The radial outer end section of force block 117 be provided with four its be distributed symmetrically in the gap 118 of force block 117 radial center.Gap 118 along force block 117 radially outer end and axially back to a side of photosensitive part 114, all be in open state along force block 117, the driving gear 120 of being convenient on laser printer driving head 119 can insert in gap 118, referring to Fig. 6 a, b, realize driving gear 120 with the engagement between gap 118, the rotary driving force that produces to obtain laser printer.

Above-mentioned photosensitive drums 101 obtains the mode of rotary driving force from laser printer, due to when assembling photosensitive drums 101 be upwards to be pushed into laser printer from self footpath, laser printer driving head 119 sprang back to the state of driving gear 120 insertion gap 118 before this again after the axial rollback of photosensitive drums 101 in photosensitive drums 101 enters the process of laser printer.In this process, because driving gear 120 upwards can form mobile with respect to gap 118 in force block 117 footpaths, cause both radial center of driving head 119 and force block 117 dislocation easily to occur, so that after photosensitive drums 101 is mounted in laser printer 120 pairs of four driving gears separately the outer wall of gap 118 form asymmetric and inhomogeneous compressing, damage driving gear 120 or gap 118, affect photosensitive drums 101 with the torque transfer between laser printer.

The utility model content

Forbidden to cause photosensitive drums with the effective problem of transfer of torque between laser printer for above-mentioned because of driving head and force block contraposition, the utility model purpose is to provide a kind of photosensitive drums of laser printer.This photosensitive drums can overcome driving head and the inaccurate phenomenon of force block contraposition effectively, in order to stably from laser printer, obtain required rotary driving force, and then avoid the drive disk assembly of laser printer driving head and photosensitive drums to sustain damage when assembling and transfer of torque.

For reaching to above-mentioned utility model purpose, the utility model has been developed a kind of pointed light sensitive drum for laser printer.It comprises photosensitive part and drive disk assembly.Drive disk assembly is fixed in the side of photosensitive part along self length direction.The end of drive disk assembly along the photosensitive part length direction back to photosensitive part is provided with cylindrical force block.Force block along self axially back to the blind hole that is provided with on the outer end wall of photosensitive part along self axial indent.Blind hole has continuous hole wall on the force block axial cross section.The quantity of blind hole is four.On the force block axial cross section, four blind holes are symmetric with respect to the radial center of force block.

Aforementioned photosensitive drums, on its force block axial cross section, with respect to the position of blind hole along the radially contiguous force block radial center of force block, blind hole along force block radially the position of contiguous force block outer cylindrical wall along the circumferencial direction of force block towards the outside bulging of blind hole.On the force block axial cross section, with respect to the position of blind hole along the radially contiguous force block radial center of force block, narrow towards blind hole inside along the circumferencial direction of force block in the stage casing that blind hole makes progress between the force block footpath.

Forbidden cause photosensitive drums with laser printer between the effectively problem of transfer of torque because of its force block with the contraposition of laser printer driving head for existing photosensitive drums, the utility model is provided with the blind hole of indent on the force block outer end wall of photosensitive drums drive disk assembly.Under this make, driving gear on the laser printer driving head is when same blind hole engagement, horizontal or footpath at the photosensitive drums drive disk assembly makes progress, the position of driving gear will be subject to the restriction of the equidirectional outer wall of blind hole, make driving gear accurately insert in blind hole, avoid the radial center of laser printer driving head and force block mutual dislocation to occur, guarantee that laser printer driving head and the radial center of force block are on same axis, and then the assurance photosensitive drums is with transfer of torque effectively between laser printer.and, the stage casing that blind hole makes progress between the force block footpath is configured to the structural feature that narrows towards the inside of blind hole along the circumferencial direction of force block, the narrowed width of stage casing on the force block circumferencial direction that result causes blind hole to make progress between the force block footpath, so, after the driving gear on the laser printer driving head is inserting blind hole, driving gear just directly is limited between two walls that blind hole narrows down at the mobile space on the force block circumferencial direction, this has just reduced the move about gap of driving gear before forming contact with blind pore wall on the force block circumferencial direction, and then after inserting blind hole, driving gear just can form rapidly contacting between driving gear and blind pore wall, thereby the moment of torsion that more effectively driving gear is transmitted passes to force block.

Description of drawings

Fig. 1 has working of laser printer process schematic diagram now.

Fig. 2 has light sensitive drum for laser printer skeleton view one now.

Fig. 3 has light sensitive drum for laser printer skeleton view two now.

Fig. 4 has light sensitive drum for laser printer skeleton view three now.

Fig. 5 the utility model light sensitive drum for laser printer skeleton view.

Fig. 6 a, b have laser printer driving head skeleton view one, two now.

Fig. 7 the utility model photosensitive drums is with existing laser printer driving head docking operation skeleton view.

Embodiment

Describe the utility model photosensitive drums in detail below in conjunction with accompanying drawing.

Fig. 5,7, the skeleton view that shows the utility model photosensitive drums and with existing laser printer driving head, dock from different perspective view respectively.

The main make of the utility model light sensitive drum for laser printer and the prior art of near field are basic identical, those skilled in the art can consult the correlation technique data of near field prior art and in conjunction with the introduction of instructions background technology part to know the essential structure situation of the utility model light sensitive drum for laser printer.Given this, the Reference numeral of related member will continue to continue to use the Reference numeral of the utility model instructions background technology part identical components in the description of the utility model light sensitive drum for laser printer embodiment.In addition, according to the utility model for existing photosensitive drums with the effective problem of transfer of torque between laser printer, propose the original intention of suitable solution, the applicant will relate to its structure that guarantees that photosensitive drums obtains stablize rotary driving force with regard to the utility model light sensitive drum for laser printer and partly carry out the emphasis description.

Referring to Fig. 5, the formation of photosensitive drums 101 comprises photosensitive part 114 and drive disk assembly 115.

Photosensitive part 114 is the hollow cylinders that adopt the aluminium preparation, namely uses aluminum barrel as its basic building block.Be coated with the photographic layer of photochromics preparation on the external cylindrical surface of aluminum barrel.

Drive disk assembly 115 is component parts of photosensitive drums 101, and its structural feature is rendered as right cylinder substantially, and it is plugged in the inner chamber of the axial end of aluminum barrel regularly.Be provided with driven wheel 116 on the external cylindrical surface of drive disk assembly 115.Driven wheel 116 can pass to developer roll 105 parts such as grade (consulting Fig. 1) to the rotary driving force that drive disk assembly 115 obtains.Axially back to an end of photosensitive part 114, be provided with the cylindrical force block 117 of its outward appearance at drive disk assembly 115 along self.The axis of force block 117 overlaps with the axis of drive disk assembly 115.

Force block 117 along self axially on the outer end wall 117-1 of photosensitive part 114, be provided with along the blind hole 121 of force block 117 axial indents.Blind hole 121 does not connect force block 117 at force block 117 on axially, and it only axially extend into the inside of force block 117 along force block 117 from outer end wall 117-1.On the xsect axial perpendicular to force block 117, the hole wall that surrounds blind hole 121 is in the uninterrupted state that connects that continues.On the xsect axial perpendicular to force block 117, radially be close to the position of force block 117 radial center with respect to blind hole 121 along force block 117, blind hole 121 is the outside bulging along the circumferencial direction of force block 117 towards blind hole 121 along the position of radially contiguous force block 117 outer cylindrical wall of force block 117, forms two bulging mouths 122.On the xsect axial perpendicular to force block 117, radially be close to the position of force block 117 radial center with respect to blind hole 121 along force block 117, narrow towards the inside of blind hole 121 along the circumferencial direction of force block 117 in the stage casing that blind hole 121 makes progress between force block 117 footpaths, forms neck 123.The quantity of blind hole 121 is four.On the xsect axial perpendicular to force block 117, four blind holes 121 are symmetric with respect to the radial center of force block 117.

Referring to Fig. 7, and in conjunction with Fig. 5,6a, b, in the time of in photosensitive drums 101 is assembled to laser printer, four driving gears 120 on laser printer driving head 119 will insert respectively in the blind hole corresponding with it 121.In driving gear 120 inserts the process of blind hole 121, due to blind hole 121 in drive disk assembly 115 footpaths upwards back to the restriction of the outer wall of drive disk assembly 115 radial center, four driving gears 120 can upwards not form and move in the footpath of drive disk assembly 115 after inserting blind hole 121, thereby guarantee that laser printer driving head 119 and the radial center of photosensitive drums force block 117 are on same axis.

In addition, neck 123 is set in blind hole 121 after, the narrowed width of neck 123 on force block 117 circumferencial directions.under this structural feature, after driving gear 120 inserts blind hole 121, driving gear 120 just directly is limited between two walls of neck 123 at the mobile space on force block 117 circumferencial directions, and then reduced the move about gap of driving gear 120 before forming contact with one of two walls of neck 123 on force block 117 circumferencial directions, thereby guarantee that after driving gear 120 inserts blind holes 121 promotions due to driving head 119 Stimulated Light printers drive driving gear 120 and form rapidly itself and the contacting of one of two walls of neck 123, the rotary driving force that laser printer is produced effectively passes to force block 117, impel photosensitive drums 101 rotations.

Claims

1. light sensitive drum for laser printer, comprise photosensitive part and drive disk assembly, described drive disk assembly is fixed in the side of described photosensitive part along self length direction, the end of described drive disk assembly along described photosensitive part length direction back to described photosensitive part is provided with cylindrical force block, it is characterized in that, described force block along self axially back to the blind hole that is provided with on the outer end wall of described photosensitive part along self axial indent, described blind hole has continuous hole wall on described force block axial cross section, the quantity of described blind hole is four, four described blind holes are symmetric with respect to the radial center of described force block on described force block axial cross section.

2. photosensitive drums according to claim 1, it is characterized in that, on described force block axial cross section, described blind hole along the position of the radially contiguous described force block outer cylindrical wall of described force block with respect to described blind hole along described force block radially the position of contiguous described force block radial center along the circumferencial direction of described force block towards the outside bulging of described blind hole, radially narrow towards described blind hole inside along the circumferencial direction of described force block at the position of contiguous described force block radial center along described force block with respect to described blind hole in the stage casing that described blind hole makes progress between described force block footpath.