CN1912766A - Tandem photosensitive-member unit for image-forming device - Google Patents
Tandem photosensitive-member unit for image-forming device Download PDFInfo
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- CN1912766A CN1912766A CN 200610111034 CN200610111034A CN1912766A CN 1912766 A CN1912766 A CN 1912766A CN 200610111034 CN200610111034 CN 200610111034 CN 200610111034 A CN200610111034 A CN 200610111034A CN 1912766 A CN1912766 A CN 1912766A
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Abstract
The tandem photosensitive-member unit includes a plurality of photosensitive-member and a pair of side plates. The plurality of photosensitive-member holding units each extends in a first direction. The plurality of photosensitive-member holding units is arranged in a second direction perpendicular to the first direction. The pair of side plates each extends in the second direction. The pair of side plates is disposed at both ends of the arranged plurality of photosensitive-member holding units with respect to the first direction. The tandem photosensitive-member unit is configured to be detachably mounted as an integral unit in a main body of an image-forming device.
Description
The cross reference of related application
The application requires the right of priority of Japanese patent application No. 2005-234825 that proposes on August 12nd, 2005 and the Japanese patent application No. 2005-376112 that proposed on Dec 27th, 2005.The full content of these priority applications is incorporated by reference herein.
Technical field
The present invention relates to a kind of tandem photosensitive-member and a kind of image processing system.
Background technology
Four photosensitive drums and the developer roll that comprise yellow, magenta, dark green and black at tandem color laser printer well-known in the art a type.In such tandem color laser printer, the basic toner image of every kind of color separately that on photosensitive drums, forms simultaneously of developer roll.Subsequently, toner image is transferred on paper or the intermediate transfer belt, make coloured image can with on monochromatic laser printer, form image speed much at one and form.
A kind of such tandem color laser printer that proposes in U.S. Patent Application Publication No. 2004/165910 (corresponding to Japan patent applicant announce 2004-279551) comprises that each developer box that all has developer roll and each all have the drum unit of photosensitive drums, thereby Delevoping cartridge and drum unit can be arranged separately in the main casing of laser printer or therefrom remove.
At U.S. Patent number 6, another image processing system that discloses among 738,590 (corresponding to the Japanese patent application No. 2003-50531) has image formation unit, is wherein assembled a plurality of image bearing members integratedly, a plurality of developer units, a plurality of charhing units and at least one intermediate transfer member.This unitary assemblage can be installed in the main body of image processing system or therefrom remove.
Summary of the invention
Yet because the developer box and the drum unit of every kind of color of yellow, magenta, dark green and black are installed respectively in according to the image processing system of U.S. Patent Application Publication No. 2004/165910, eight boxes are changed as consumptive material respectively altogether.Have so a large amount of consumable part, may be with regard to there being the user by the danger of doing fascination and changing with the box of false color.
On the other hand, at U.S. Patent number 6, another kind of image formation unit in the image processing system that discloses in 738,590 assembly parts as a whole is installed in the main body of image processing system or therefrom removes, thereby prevents above-mentioned such obscuring when the user changes wrong box.Yet, make the complicacy and the cost that have increased manufacturing process as the image formation unit of one assembly parts, also make maintenance inconvenient simultaneously.Also too complicated and inconvenient for recycling the process of dismantling image formation unit after use.
In view of the foregoing, a target of the present invention provides a kind of tandem photosensitive-member unit, this tandem photosensitive-member unit has and only has the minority consumable part to prevent simple structure that the user obscures and can be by convenient assembling and maintenance minimizing cost when changing these parts.Another target of the present invention provides a kind of recycling tandem photosensitive-member unit that is suitable for.Another target of the present invention provides a kind of image processing system that this tandem photosensitive-member unit is installed.
In order to reach above-mentioned and other target, provide a kind of tandem photosensitive-member unit according to an aspect of the present invention.This tandem photosensitive-member unit comprises a plurality of Electrifier frame, photoreceptors and pair of side plates.In a plurality of photosensitive-member holding units each all extends upward and keeps the Electrifier frame, photoreceptor of every kind of color in the multiple color in first party.A plurality of photosensitive-member holding units are arranged on the second direction perpendicular to first direction.Each side plate in the pair of side plates all extends upward in second party.This is arranged in the two ends of a plurality of photosensitive-member holding units of being arranged with respect to first direction to side plate.This tandem photosensitive-member unit is configured to as a whole, and the unit is detachably mounted in the main body of image processing system.
According to the invention provides a kind of image processing system on the other hand.This image processing system comprises main body and tandem photosensitive-member unit.This tandem photosensitive-member unit is configured to be removably mounted in the main body.Tandem photosensitive-member unit comprises a plurality of photosensitive-member holding units and pair of side plates.In a plurality of photosensitive-member holding units each all extends upward and keeps the Electrifier frame, photoreceptor of each color in the multiple color in first party.A plurality of photosensitive-member holding units are arranged on the second direction perpendicular to first direction.Each side plate in the pair of side plates extends upward in second party.This is arranged in the two ends of a plurality of photosensitive-member holding units of being arranged with respect to first direction to side plate.Tandem photosensitive-member unit is configured to be removably mounted in the main body as a unit.
Description of drawings
Illustrative aspect according to the present invention will be described in detail with reference to the accompanying drawings, wherein;
Fig. 1 is the side sectional view of demonstration as the color laser printer of the one side of image processing system of the present invention;
Fig. 2 is arranged on the side sectional view of the bulging subelement in the color laser printer among Fig. 1, and developer box is installed on the bulging subelement;
Fig. 3 is the side sectional view of the developer box shown in Fig. 2;
Fig. 4 is installed in the skeleton view that the left side of drum unit is wherein seen from developer box;
Fig. 5 is the skeleton view that the left side of a drum unit that is removed from developer box is seen;
Fig. 6 is the planimetric map of the drum unit shown in Fig. 4;
Fig. 7 is the left side view of the drum unit shown in Fig. 4;
Fig. 8 is the cut-open view along the line VIII-VIII shown in Fig. 7;
Fig. 9 is the decomposition diagram of drum subelement;
Figure 10 is the skeleton view of drum subelement;
Figure 11 is the skeleton view of the explanation pair of side plates seen from the left side front-axle beam that is assembled to coordination, four bulging subelements and the back rest;
Figure 12 A is the skeleton view of the explanation pair of side plates seen from the right side front-axle beam that is assembled to coordination, four bulging subelements and the back rest;
Figure 12 B is the zoomed-in view of Figure 12 A of explanation electrode;
Figure 13 A is the side view of the location of drum axle in the explanation side plate;
Figure 13 B is the zoomed-in view of explanation near Figure 13 A of the part of wire spring;
Figure 13 C is the key diagram how the display line spring promotes the drum axle;
Figure 14 is the skeleton view of the pair of side plates of the explanation seen from the left side front-axle beam that has been mounted to coordination, four bulging subelements and the back rest;
Figure 15 A is the skeleton view of the pair of side plates of the explanation seen from the right side front-axle beam that has been mounted to coordination, four bulging subelements and the back rest;
Figure 15 B is the zoomed-in view of Figure 15 A of explanation electrode;
Figure 16 is the rear view of developer box;
Figure 17 is the left side view of developer box;
Figure 18 is the skeleton view that shows the drum unit in the main casing that is installed in laser printer;
Figure 19 is the skeleton view of the laser printer among the cut Figure 18 of a part;
Figure 20 is the skeleton view that shows the drum unit of partly being pulled out from main casing;
Figure 21 is the skeleton view of the drum unit after demonstration is removed from main casing;
Figure 22 is the skeleton view of seeing from the left side of drum unit (having rotatable nearside grip part);
Figure 23 shows the skeleton view that is installed in the drum unit in the main casing;
Figure 24 is the skeleton view that shows the drum unit that removes from main casing;
Figure 25 is the skeleton view of seeing from the bottom left of the drum unit that is equipped with the forward foot in a step and the rear foot;
Figure 26 is the left side view at the drum unit shown in Figure 25;
Figure 27 A is the side view according to the side plate of the location of drum axle in the first distortion explanation side plate;
Figure 27 B is the zoomed-in view how the display line spring promotes Figure 27 A of drum axle;
Figure 28 is the decomposition diagram according to the bulging subelement of second distortion;
Figure 29 is the explanation pair of side plates seen from the left side front-axle beam that is assembled to coordination, according to four the bulging subelements of the distortion of second shown in Figure 28 and the skeleton view of the back rest;
Figure 30 is the skeleton view that is mounted to the pair of side plates of four the bulging subelements shown in the front-axle beam, Figure 28 of coordination and the back rest from the explanation that the left side is seen;
Figure 31 shows the skeleton view that is installed in according to the drum unit in the main casing (having rotatable nearside grip part) of the 6th printer that is out of shape;
Figure 32 A be according to the diagram protecgulum in the zone that comprises protecgulum and handle of the printer of the 6th distortion to off-position motion and handle sectional view towards the deposit position rotation, wherein the teat of the guiding piece on protecgulum contacts the far-end of handle;
Figure 32 B is the sectional view according to the printer of the 6th distortion, wherein the far-end of the parallel portion of guiding piece contact handle; And
Figure 32 C is the sectional view of printer according to the 6th distortion, and wherein protecgulum is in off-position and handle is in deposit position.
Embodiment
The tandem photosensitive-member unit of image processing system according to certain aspects of the invention will be described with reference to the accompanying drawings, and wherein identical part and element are repeated in this description avoiding with identical reference numerals.
1, the general structure of laser printer
Fig. 1 is the side sectional view of demonstration as the color laser printer 1 of an aspect of image processing system of the present invention.Fig. 2 is arranged on the side sectional view of the bulging subelement in the color laser printer among Fig. 1, and developer box 22 is installed on the bulging subelement.Fig. 3 is the side sectional view of the developer box 22 shown in Fig. 2.
As shown in FIG. 1, color laser printer 1 is the horizontal tandem type printer that has on the direction of level a plurality of bulging subelement 23 side by side.Printer 1 comprises that main casing 2 and being used in main casing 2 provide the feed-in unit 4 of paper 3, be used for forming the image formation unit 5 of images and after image is formed on the paper 3, being used to discharge the deliverying unit 6 of paper 3 at the paper that provides from feed-in unit 43.
In the following description, the right side of the printer 1 in Fig. 1 (the bulging opening 162 of main casing 2 is formed on a side wherein) will be called as " front side ", and the left side of the printer 1 among Fig. 1 will be called as " rear side ".Further, the nearside about paper width direction among Fig. 1 will be called as " left side ", and the distally among Fig. 1 will be called as " right side ".
Have in addition the description except following, hereinafter will meet drum unit 21 and developer box 22 and be installed in state in the main casing 2 direction in the description of drum unit 21 and developer box 22.
(1) feed-in unit
Feed-in unit 4 comprises the dish described later accommodation section 171 that can slip into main casing 2 bottoms in fore-and-aft direction or the paper dish 7 that is used to hold paper 3 that therefrom removes; Be arranged on the last front end of paper dish 7 and separate roller 8 that faces one another and separating pad 9; With the feed-in roller 10 that is arranged on separate roller 8 rear sides.
Feed-in unit 4 comprises the feed side paper transport path 11 that is used to guide from the paper 3 of paper dish 7 transmission.Feed side paper transport path 11 has basic U font on lateral plan, be used for initially guiding paper 3 forward and subsequently towards the back reverse directions.Feed side paper transport path 11 has the upstream extremity of the downside that is positioned at the U font adjacent with separate roller 8 and is positioned at the downstream end of the upside of the U font adjacent with travelling belt described later 53.
Feed-in unit 4 also comprises along feed side paper transport path 11 and faces one another paper cleaning roller 12 and the pinch roll 13 that is provided with and is positioned at last the place ahead of separate roller 8; Be arranged on a pair of registration rollers 14 of paper cleaning roller 12 and pinch roll 13 tops on the feed side paper transport path 11 equally.
The inside that pressboard 15 is arranged on paper dish 7 is used for the paper 3 of support stack state.Pressboard 15 is pivotally supported in its back-end, thus front end downwards pivot rotate to pressboard 15 and lean against rest position on the base plate of paper dish 7, and can rotate to pressboard from the acclivitous feed-in of rear end forward end position to head lamp brush guard pivot.
The following front portion that lever 16 is arranged on paper dish 7 is used for upwards lifting the front end of pressboard 15.Lever 16 pivotally is supported on the position of pressboard 15 front ends below, thereby the front end of lever 16 can move up and down.
By rotating lever 16 pivotally, lever 16 lifts the front end of pressboard 15, and mobile pressboard 15 makes it enter the feed-in position.When pressboard 15 was in the feed-in position, the paper that is stacked on paper 3 tops on the pressboard 15 was compressed against on the feed-in roller 10.When 10 rotations of feed-in roller, paper 3 is by the position feed-in between separate roller 8 and separating pad 9.
When paper dish 7 by when main casing 2 removes, pressboard 15 enters rest position.When pressboard 15 was in rest position, paper 3 can be stacked on the pressboard 15.After feed-in roller 10 had been fed into paper 3 position between separate roller 8 and the separating pad 9,8 ground of the separate roller of rotation separated and transmit paper 3.The paper that separated roller 8 transmits is by between paper cleaning roller 12 and the pinch roll 13, and this moment, paper cleaning roller 12 was removed the paper dust from paper 3, and continued to shift to registration rollers 14 along feed side paper transport path 11.
Behind alignment paper 3, registration rollers 14 is sent to travelling belt 53 with paper 3.
(2) image formation unit
(2-1) scanning element
Image formation unit 5 comprises scanning element 17, processing unit 18, transfer printing unit 19 and fixation unit 20.Independent scanning element 17 is arranged on the top of main casing 2.Although do not show that in the drawings scanning element 17 comprises laser emission element, polygon mirror and a plurality of lens and catoptron.Laser emission element is based on the view data emission of lasering beam of every kind of color.At scioptics with after mirror reflects, laser beam irradiation photosensitive drums 24 separately corresponding to every kind of color.
(2-2) processing unit
Processing unit 18 is arranged on scanning element 17 belows and 4 tops, feed-in unit.As will be described below, processing unit 18 comprises independent drum unit 21 and four developer boxes 22 corresponding to four kinds of colors.
(2-2-1) drum unit
As following will detailed description, drum unit 21 front side from main casing 2 on fore-and-aft direction is detachably mounted on the bulging accommodation section 161 of main casing 2.Drum unit 21 comprises the bulging subelement 23 of four of four kinds of every kind of colors in the color.Particularly, four bulging subelements 23 are yellow drum subelement 23Y, pinkish red drum subelement 23M, dark green drum subelement 23C and black drum subelement 23K.
As shown in Figure 2, each drum subelement 23 keeps photosensitive drums 24, grid-control formula corona charging device 25 and cleaning brush 68.
Photosensitive drums 24 (hereinafter, Width will be indicated the left and right directions perpendicular to fore-and-aft direction and vertical direction) on Width is extended.Photosensitive drums 24 comprises columniform and has the main drum body 26 of the positive charge photographic layer that is formed by polycarbonate on its outer surface and the drum axle 27 that is provided with along the main axis that rouses body 26.
Two transverse end of drum axle 27 are inserted into (see figure 10) in the body side frame part 71 described later, and by side plate 121 location (see figure 7)s described later.
Rotatable supporting member 30 (seeing Figure 12 A) is installed on two axial ends of main drum body 26, so that but it can not rotate with respect to main drum body 26 can be with respect to 27 rotations of drum axle.Have this structure, main drum body 26 rotatably is supported on the drum axle 27.In image forming course, photosensitive drums 24 is by the drive force rotation of the motor from be arranged on main casing 2 (not having to show) transmission.
As shown in FIG. 2, charger 25 is supported on the last rear of photosensitive drums 24 on the following central frame part 72 diagonally.Charger 25 is at a certain distance in the face of photosensitive drums 24.Charger 25 comprises in the face of still separating the discharge electric wire 28 of setting with photosensitive drums 24 and being arranged on the grid 29 that discharge between electric wire 28 and the photosensitive drums 24.
Discharge electric wire 28 is connected to electric wire electrode 80 described later (seeing Figure 12 B).Grid 29 are connected to gate electrode 81 described later (Figure 12 B).
Form operating period at image, the high-tension circuit plate (not showing) that is arranged in the main casing 2 is applied to discharge electric wire 28 to produce corona discharge from discharge electric wire 28 by electric wire electrode 80 with high voltage.Simultaneously, the high voltage circuit plate (not having to show) that is arranged in the main casing 2 is applied to grid to control the amount of charge that is provided on it on the surface that uniform positive charge is applied to photosensitive drums 24 simultaneously by gate electrode 81 with high voltage.
Cleaning brush 68 is supported on the central frame part 72 described later in the position of photosensitive drums 24 back, and in the face of and contact photosensitive drums 24.Form operating period at image, be arranged on high voltage circuit plate (not showing) in the main casing 2 and will clean bias voltage by cleaning electrode 83 described later (seeing Figure 12 B) and be applied to cleaning brush 68.
(2-2-2) developer box
As shown in fig. 1, developer box 22 is removably installed corresponding to the bulging subelement 23 of every kind of color.Particularly, developer box 22 comprises the yellow developer box 22Y that is removably mounted on the yellow drum subelement 23Y, is removably mounted on pinkish red developer box 22M on the pinkish red drum subelement 23M, is removably mounted on the dark green developer box 22C on the dark green drum subelement 23C and is removably mounted on black developer box 22K on the black drum subelement 23K.
As shown in FIG. 3, each developer box 22 comprises developer frame 31 and the stirrer in developer frame 31 32, donor rollers 33, developer roll 34 and thickness adjusted blade 35.
Developer frame 31 is formed box-like, has opening 36 in the lower end.Partition wall 39 is relevant to the centre that vertical direction is arranged on developer frame 31, is used for the inside of developer frame 31 is separated into toner container cavity 37 and development chamber 38.Through hole 40 is formed in the partition wall 39 so that be communicated with between toner container cavity 37 and the development chamber 38.
The toner of every kind of color all is the toner with non magnetic one-component of positive charge.Polymerized toner has spherical form and by obtaining with well-known polymerization copolymerization polymerization single polymerization monomer such as suspension polymerization.For example, polymerization single polymerization monomer can be such as cinnamic styrene monomer or such as the acrylic monomers of acrylic acid, alkyl (C1-C4) acrylate or alkyl (C1-C4) allylidene acid esters.The basic granules of toner is mainly formed by the binder resin that mixes with the colorant of respective color, charge control agent, paraffin etc., and further comprises and be used to improve mobile adjuvant.
Yellow, magenta, colorant dark green and black is mixed and produce every kind of color of these colors.Charge control agent is by having such as the ion monomer of the ion functional group of ammonium salt and monomer such as styrene monomer that can homo-ion monomer copolymerization or the charge control resin that the acrylic monomers copolymerization obtains.Adjuvant can be such as silicon dioxide, aluminium oxide, titanium dioxide, strontium titanates, cerium oxide or magnesian metal oxide powder; Or such as the inorganic powder of carbide powder or metal salt powder.
Stirrer 32 is arranged in the toner container cavity 37 and comprises the turning axle 41 in the two side 141 that rotatably is supported on developer frame 31 and the agitating member 42 that is axially disposed within on the turning axle 41 and extends radially outwardly from turning axle along turning axle 41.During image forms, be transferred to turning axle 41 from the driving force that is arranged on the motor (not having to show) in the main casing 2 by passive connection gear 144 (seeing Figure 17), make agitating member 42 in toner container cavity 37, carry out circular motion.
Donor rollers 33 is arranged on 38 inner via holes, 40 belows, development chamber.Donor rollers 33 comprises supply roll shaft 43 in the two side that rotatably is supported on developer frame 31 141 that is formed by metal and the sponge roller 44 that is formed by the conductive sponge material around the covering supply roll shaft 43.During image forms, be transferred to supply roll shaft 43 to drive donor rollers 33 rotations by passive connection gear 144 from the driving force that is arranged on the motor (not having to show) in the main casing 2.
Developer roll 34 is arranged on the following rear of development chamber 38 internal feed rollers 33 diagonally.Developer roll 34 comprises the rubber rollers 46 that is formed and rotatably be supported on the development roll shaft 45 in the two side 141 of developer frame 31 and formed by the conductive rubber that covers around the development roll shaft 45 by metal.
More specifically; rubber rollers 46 has double-layer structure; the coating that comprises the rubber rollers layer that constitutes by materials such as the conductive polyurethane rubber that contains meticulous carbon granule or this type of material, silicon rubber, EPDM rubber and be applied to the rubber rollers laminar surface and mainly form by urethane rubber, urethane resin, polyimide resin or this type of material.Developer roll electrode 82 described later (seeing Figure 12 B) is connected to development roll shaft 45.
Developer roll 34 is arranged to against donor rollers 33, so that produce pressure between rubber rollers 46 and sponge roller 44.Developer roll 34 also exposes in the bottom of developer box 22 by opening 36.
During image forms, be transferred to development roll shaft 45 from the driving force that is arranged on the motor (not having to show) in the main casing 2 by passive connection gear 144 (seeing Figure 17) and be used for rotating developer roll 34.The development bias voltage that high-tension circuit plate from be arranged on main casing 2 (not having to show) provides also is applied to developer roll 34 by developer roll electrode 82.
Thickness adjusted blade 35 is arranged on and consequently presses developer roll 34 in the development chamber 38 from top.Thickness adjusted blade 35 comprises the pressure portion 49 of blade 48 that is made of the metal blade spring member and the far-end that is arranged on blade 48.Pressure portion 49 is formed by electrically insulating silicone rubber and has a semicircular xsect.
The cardinal extremity of blade 48 is fixed to partition wall 39 by fixed component 47, and the elastic force of blade 48 makes the rubber rollers 46 of the pressure portion 49 of far-end from top contact developer roll 34 simultaneously.
(2-2-3) development operation in the processing unit
In each developer box 22, the toner that is contained in the respective color in the toner container cavity 37 moves towards through hole 40 by himself gravity.When stirrer 32 stirred toner, some toners were discharged in the development chamber 38 by through hole 40.
The toner that is discharged in the development chamber 38 by through hole 40 is provided on the donor rollers 33.When donor rollers 33 rotations, the toner that is carried on the donor rollers 33 is provided to developer roll 34.At this moment, when the development bias voltage is applied to developer roll 34, toner between donor rollers 33 and developer roll 34 by the forward triboelectric charging.
When developer roll 34 rotation, between the pressure portion 49 and the rubber rollers 46 of developer roll 34 of the toner that is provided to developer roll 34 surfaces by thickness adjusted blade 35, thereby on the surface of rubber rollers 46, keep the uniform thin layer of thickness.
Simultaneously, as shown in Figure 2, the charger 25 generation corona discharges corresponding to developer box 22 in the drum subelement 23 are used for the surface charging of uniform normal polarity to photosensitive drums 24.When photosensitive drums 24 continues rotation, the laser beam of launching from scanning element 17 with high-velocity scanning photosensitive drums 24 through the surface of positive charge, forming corresponding to the electrostatic latent image that will be formed on the image on the paper 3 on the photosensitive drums 24.
Next, when developer roll 34 rotation, the toner that is carried on developer roll 34 lip-deep positive charge and photosensitive drums 24 contact and are provided to and be exposed to laser beam on the surface of photosensitive drums 24 of positive charge so and have a zone of electronegative potential.Like this, the sub-image on the photosensitive drums 24 develops to visual image according to the discharged-area development process, thus the toner image of the corresponding respective color of photosensitive drums 24 carryings.
Be developed roller 34 recovery at the toner that remains in behind the transfer operation on the photosensitive drums 24.Further, paper dust on the photosensitive drums 24 brush 68 that is cleaned that is deposited on from paper 3 removes.
(2-3) transfer printing unit
As shown in fig. 1, transfer printing unit 19 is arranged in the main casing 24 tops, feed-in unit and the front and back below processing unit 18 extend upward.Transfer printing unit 19 comprises driven roller 51, follows roller 52, travelling belt 53, transfer roll 54 and cleaning unit 55.
Driven roller 51 and follow roller 52 and on fore-and-aft direction, be provided with relative to one another separated by a distancely.Driven roller 51 is arranged on the back of black drum subelement 23K, and follows the front that roller 52 is arranged on yellow drum subelement 23Y.
Travelling belt 53 is the endless belts that formed by the film of synthetic resin such as poly-carbon ester acid of the conduction as the conductive particle of carbon that contains distribution or polyimide.Travelling belt 53 is around driven roller 51 and follow roller 52 circlewise.
During image forms, be sent to driven roller 31 from the driving force that is arranged on the motor (not having to show) in the main casing 2 and make its rotation.When driven roller 51 was driven in rotation, travelling belt 53 centered on driven roller 51 and follows roller 52 circulations and advance, and follows the motion that roller 52 is followed travelling belt 53 simultaneously.Travelling belt 53 in the transfer position of the photosensitive drums 24 of contact drum subelement 23 to move with the surperficial identical direction of photosensitive drums 24.
Transfer roll 54 is arranged on the position of facing each photosensitive drums 24 in the travelling belt 53, and travelling belt 53 is inserted between the two simultaneously.Transfer roll 54 covers the rubber rollers that is formed by conductive rubber by metal roller shaft and constitutes.Move with the direction identical with travelling belt 53 in transfer position on the surface that transfer roll 54 rotatably is arranged to make transfer roll 54.During image formed, the high-tension circuit plate (not showing) that is arranged in the main casing 2 was applied to transfer roll 54 with transfer bias.
Cleaning unit 55 is arranged on travelling belt 53 belows and comprises main clearer 56, second clearer 57, scraping blade 58 and toner gatherer 59.
Main clearer 56 is arranged in the bottom of a side contacts travelling belt 53 relative with the top of the contact photosensitive drums 24 of travelling belt 53 and transfer roll 54.Main clearer 56 is formed on the direction of the circular motion of following travelling belt 53 and rotates.During image forms, be arranged on high-tension circuit plate (not showing) in the main casing 2 and will lead the cleaning bias voltage and be applied to main clearer 56.
Second clearer 57 is arranged on main clearer 56 belows and is in contact with it, and is configured to outer surface that its rotation makes second clearer 57 and moves with the direction identical with main clearer 56 at contact position.During image formed, the high-tension circuit plate (not showing) that is arranged in the main casing 2 was applied to second clearer 57 with the second cleaning bias voltage.
Scraping blade 58 is arranged to from following contact second clearer 57.
Toner gatherer 59 be arranged on the main clearer 56 and second clearer 57 below, be used for collecting the toner that falls from second clearer 57.
Transmit the paper 3 that provides from feed-in unit 4 along the driving of driven roller 51 and the travelling belt 53 that circulation moves of following of following roller 52 towards the rear side of printer 1, thereby make paper 3 in succession by transfer position corresponding to each drum subelement 23.When paper 3 was transmitted, the toner image that is carried on every kind of color on each photosensitive drums 24 of rousing subelement 23 was transferred on the paper 3 in succession, forms coloured image thereon.
For example, at first, the photosensitive drums 24 lip-deep yellow toner image that are carried among the yellow drum subelement 23Y are transferred on the paper 3, after this, the photosensitive drums 24 lip-deep magenta toner image that are carried among the pinkish red drum subelement 23M are transferred on the paper 3, and are superimposed upon on the yellow toner image that has been transferred.Be carried on equally, respectively on the toner image that photosensitive drums 24 lip-deep dark green toner image among dark green drum subelement 23C and the black drum subelement 23K and black toner image be superimposed on previous transfer printing on paper 3, to form coloured image.
Being deposited on be cleaned subsequently unit 55 of travelling belt 53 lip-deep any toners in the above-mentioned transfer operation removes.At first, be transferred to main clearer 56 by main cleaning bias voltage, and transferred to second clearer 57 by the second cleaning bias voltage subsequently at travelling belt 53 lip-deep toners.Next, scraping blade 58 scrapes off the toner that is transferred on second clearer 57.The toner that scrapes off from second clearer 57 drops on the toner gatherer 59.
(2-4) fixation unit
Fixation unit 20 is arranged in the main casing 2 back of black drum subelement 23K and relative on fore-and-aft direction with the transfer position of photosensitive drums 24 contact travelling belts 53.Fixation unit 20 comprises warm-up mill 61 and pressure roll 62.
Warm-up mill 61 is made of metal tube, and its surface scribbles releasing layer.Metal tube holds the Halogen lamp LED that extends along the axial direction of main casing 2, is used for the surface of warm-up mill 61 is heated to fixed temperature.
Pressure roll 62 is arranged on below the warm-up mill 61 and faces warm-up mill 61.Pressure roll 62 from its bottom abutment on warm-up mill 61.
After coloured image was transferred on the paper 3, paper 3 was sent to fixation unit 20.In fixation unit 20, in the time of between paper 3 is by warm-up mill 61 and pressure roll 62, coloured image by heat by photographic fixing to paper 3.
(3) deliverying unit
Outlet end transfer path 63 is arranged in the deliverying unit 6.Outlet end transfer path 63 has basic U font in side view, upstream extremity is positioned at the downside adjacent with fixation unit 20, and 64 adjacent upsides are coiled in the discharge that downstream end was positioned at and was formed on main casing 2 tops.Therefore, outlet end transfer path 63 at first guides paper 3 backward, then reverse directions and upwards discharge paper 3 forwards.
Transfer roll 65 and pinch roll 66 are provided with along outlet end transfer path 63 with facing with each other.Further, a pair of distributing roller 67 is arranged on the downstream end of outlet end transfer path 63.Discharge dish 64 is formed on the top of main casing 2, as the recess that deepens gradually towards rear side.Discharge dish 64 plays a part the discharge paper 3 of support stack state.
By behind the fixation unit 20, transfer roll 65 and pinch roll 66 transmit paper 3 along outlet end transfer path 63 to distributing roller 67, and distributing roller 67 is discharged to paper 3 on the discharge dish 64 at paper 3.
2, drum unit
Fig. 4 is installed in the skeleton view that the left side of drum unit 21 is wherein seen from developer box 22.Fig. 5 is the skeleton view that the left side of a drum unit that is removed 21 from developer box 22 is seen.Fig. 6 is the planimetric map of the drum unit 21 shown in Fig. 4.Fig. 7 is the left side view of the drum unit 21 shown in Fig. 4.Fig. 8 is the cut-open view along the line VIII-VIII shown in Fig. 7.Fig. 9 is the decomposition diagram of drum subelement 21.Figure 10 is the skeleton view of drum subelement 21.Figure 11 is the skeleton view of the explanation pair of side plates 121 seen from the left side front-axle beam 96 that is assembled to coordination, four drum subelements 23 and the back rest 111.Figure 12 A is the skeleton view of the explanation pair of side plates 121 seen from the right side front-axle beam 96 that is assembled to coordination, four drum subelements 23 and the back rest 111.Figure 12 B is the zoomed-in view of Figure 12 A of explanation electrode.Figure 13 A is the side view of the location of the drum axle 27 in the explanation side plate 121.Figure 13 B is the zoomed-in view of explanation near Figure 13 A of the part of wire spring 127.Figure 13 C is the key diagram how display line spring 127 promotes drum axle 27.Figure 14 is the skeleton view of the pair of side plates 121 of the explanation seen from the left side front-axle beam 96 that has been mounted to coordination, four drum subelements 23 and the back rest 111.Figure 15 A is the skeleton view of the pair of side plates 121 of the explanation seen from the right side front-axle beam 96 that has been mounted to coordination, four drum subelements 23 and the back rest 111.Figure 15 B is the zoomed-in view of Figure 15 A of explanation electrode.
Next, drum unit 21 will be described to 15B with reference to figure 4.
As shown in FIG. 4, drum unit 21 comprises corresponding with four kinds of colors and four bulging subelements 23 arranged side by side on fore-and-aft direction; Be arranged on the front-axle beam 96 and the back rest 111 of the front and back side of four bulging subelements 23; Pair of side plates 121 with the transverse end that is arranged on front-axle beam 96, four drum subelements 23 and the back rest 111.Four bulging subelements 23 (except the belfry of photosensitive drums 24 grades), front-axle beam 96, the back rest 111 and pair of side plates 121 constitute unit framework.
Four bulging subelements 23, front-axle beam 96, the back rest 111 and pair of side plates 121 that constitute drum unit 21 unit as a whole are installed in the bulging opening 162 of main casing 2 slidably or therefrom remove.
(1) rouses subelement
As shown in Fig. 9 and 10, drum subelement 23 is included in the pair of side frames part 71 that faces with each other and be provided with separated by a distance on the Width, and between body side frame part 71 across central frame part 72.
(1-1) body side frame part
Each body side frame part 71 is all formed by the synthetic resin material and have the tabular of basic rectangle in lateral plan.More specifically, body side frame part 71 is configured as in lateral plan and resembles parallelogram substantially and recede downwards.
Guiding groove 73 is formed in the inner wall surface of body side frame part 71 position respect to one another on Width, is used for guiding developer box 22 when developer box 22 is installed in bulging subelement 23 or removes from it.
Guiding groove 73 in the inner wall surface of body side frame part 71 basically form near the top edge of the rear side of body side frame part 71 on vertical direction near the point of the lower limb of the front side of body side frame part 71.The upstream extremity of guiding groove 73 is wideer and towards open top.When developer box 22 was installed on the bulging subelement 23, the downstream end of guiding groove 73 (deep) was arranged on the position corresponding to development roll shaft 45, thereby made developer roll 34 contact photosensitive drums 24.Guiding groove 73 is formed the recess that outwards caves in the inner wall surface of body side frame part 71 on Width.As shown in Figure 16, the ring element 50 of conduction is received in the guiding groove 73 slidably, is used for covering two transverse end of development roll shaft 45.
As shown in FIG. 9, projection 75 is formed on the position of guiding groove 73 fronts in the upside of body side frame part 71.Projection 75 is for cylindrical shape and have the hollow bulb that penetrates body side frame part 71.Projection 75 is outwards outstanding on Width from the outer wall of body side frame part 71.When developer box 22 was installed on the bulging subelement 23, the window 142 of developer box 22 (seeing Figure 17 equally) faced with each other on Width by projection 75, as shown in Figure 8.
Drum support unit 76 (Fig. 9) is formed on and is used for supporting photosensitive drums 24 in the body side frame part 71.Each drum support unit 76 comprises in the inner wall surface that is formed on body side frame part 71 lower end side frame parts 71 and has on Width the receptacle 77 of outwards recessed cylindrical shape.Receptacle 77 is admitted below columniform insertion section 90 of the central frame part 72 that will describe.Axle inserts through hole 78 and is formed on the center of receptacle 77 and penetrates body side frame part 71 on thickness direction.
Two tapped through holes 79 are formed on the back edge in each body side frame part 71, penetrate body side frame part 71 on thickness direction.Bolt 92 is inserted into tapped through hole 79, is used for body side frame part 71 is fixed on the central frame part 72.One of tapped through hole 79 is formed in the following back edge of body side frame part 71, and another is formed on along antemarginal centre.
The upwardly extending ridge 84 in front and back be formed on each body side frame part 71 projection 75 above.Ridge 84 forms and extends upward in front and back and from the outer wall surface of body side frame part 71 outwards outstanding narrow edge fit on Width.
As shown in FIG. 9, connect the left side position intermediate that inner via hole 74 is formed on guiding groove 73 in the body side frame part 71, when developer box 22 is installed on the bulging subelement 23, this position on Width corresponding to the passive connection gear 144 (Figure 17) of developer box 22.Connect inner via hole 74 on Width, penetrating the circular hole of left side frame part 71.
As shown in Figure 12 B, electric wire electrode 80, gate electrode 81, developer roll electrode 82 and cleaning electrode 83 are supported in the right side frame part 71 by be inserted into body side frame part 71 on thickness direction, so that outwards outstanding on Width from the outer wall surface of body side frame part 71.
Further, the adaptive wall 94 of periphery is arranged on the position corresponding to each electric wire electrode 80.Semi arch is outwards given prominence to and formed to each adaptive wall 94 from the outer wall surface of right side frame part 71 around electric wire electrode 80 on Width.
(1-2) central frame part
As shown in Fig. 9 and 10, central frame part 72 usefulness synthetic resin materials are independent of body side frame part 71 molded forming.Central frame part 72 is made of central plate 86 that extends on Width and apodema 87 integral body that are arranged on two transverse end of central plate 86.
The charger holding unit 88 that has basic narrow boards shape in planimetric map is arranged on the vertical centre of the central plate 86 that extends on the Width, is used for keeping charger 25.Charger holding unit 88 remains on grid 29 (see figure 2)s below the discharge electric wire 28 that extends on the Width and the electric wire 28 that discharges.The discharge electric wire clearer 89 that charger holding unit 88 also keeps clamping discharge electric wire 28 and can slide on the electric wire 28 that discharging on the Width.
The inner panel 87 of transverse end that is arranged on central plate 86 is by forming forwards being bent upwards central plate 86.In side view, each inner panel 87 has the shape of the fundamental triangle that narrows down forward.This front end that columniform axle insertion section 90 is arranged on inner panel 87 is used for admitting drum axle 27.
Further, bolt receptacle 91 is formed in the upper and lower side on its rear rim of each inner panel 87, and 86 extends internally at Width from the outer wall surface of inner panel 87 along central plate.Bolt 92 is threaded into bolt receptacle 91 so that body side frame part 71 is installed on the central frame part 72.
(1-3) rouse the assembling of subelement
As shown in FIG. 9, body side frame part 71 is positioned at two transverse end of central frame part 72.Central frame part 72 is in the following manner between the inserting side frame part 71.At first, insert through hole 78, the receptacle 77 in the bulging support unit 76 of the cylindrical shaft insertion section 90 inserting side frame parts 71 of central frame part 72 for overlapping axle on Width.Simultaneously, the tapped through hole 79 of bolt receptacle 91 overlapping body side frame part 71 on Width of central frame part 72.Next, bolt 92 is inserted into tapped through hole 79 and is threaded into bolt receptacle 91.As a result, body side frame part 71 is installed in two transverse end of central frame part 72, as shown in Figure 10, finishes the assembling of bulging subelement 23.
When body side frame part 71 is installed in the two ends of central frame part 72, the central plate 86 of central frame part 72 contact side frame part 71 in the zone from the bottom to the vertical midpoint on back edge, and between two body side frame parts 71 across.
When body side frame part 71 is installed in two transverse end of central frame part 72, is arranged on electric wire electrode 80 and gate electrode 81 on the right side frame part 71 and on central frame part 72, forms and being connected of discharge electric wire 28 and grid 29.Further, cleaning electrode 83 is connected to cleaning brush 68.
Further, photosensitive drums 24 is maintained in the bulging subelement 23.Particularly, fitting in rotating supporting member 30 (seeing Figure 12 A) neutralization can not be arranged between the inner panel 87 with respect to the main drum body 26 of its rotation, makes it be parallel to charger 25 and still leaves certain distance.Next, drum axle 27 is inserted the columniform axle insertion section 90 of through hole 78 and central frame part 72 along the main axle that rouses the axis inserting side frame part 71 of body 26 and is fixed, and makes it insert through hole 78 rotations with respect to axle.Bulging axle 27 rotatably supports the rotating supporting member 30 of leading drum body 26 in order to support, thereby photosensitive drums 24 is remained in the bulging subelement 23.
By two axial ends of support drum axle 27, body side frame part 71 can be located with the other side relative to each other by drum axle 27.
(2) front-axle beam
As shown in Figure 11 and the 12A, front-axle beam 96 is arranged on the front of four bulging subelements 23 arranged side by side on the fore-and-aft direction, and between pair of side plates 121 across.
Front-axle beam 96 is included in the pair of sidewalls 97 that faces with each other on the Width, and between this oppose side wall 97 across antetheca 98 and rear wall 99.The parts of front-axle beam 96 are molded with the synthetic resin material monolithic.
The sidewall shank 101 that each sidewall 97 all is included in the sidewall base portion 100 that is configured as parallelogram in the side view substantially and extends back downwards diagonally from the lower end of sidewall base portion 100.Preceding bolt receptacle 103 is arranged on the outer wall surface of sidewall base portion 100.Bolt receptacle 103 was used for attached side plate 121 before bolt 136 was threaded into.
Downward sweptback front angled surface 102 is formed on the rear end face of sidewall 97, and sidewall base portion 100 is connected to sidewall shank 101.
Nearside grip part (grip part, front side) 104 is arranged on the transverse center of antetheca 98.Nearside grip part 104 by on the Width separated by a distance face with each other the pair of side plates 105 that is provided with and between side plate 105 across central plate 106 constitute.
Each side plate 105 basically forms leg-of-mutton plate shape when seeing from the side, and outstanding forward from the front wall surfaces of antetheca 98.The leading edge of side plate 105 is downward-sloping forward diagonally.
As shown in Figure 11, rear wall 99 has the rectangular-plate-shaped of the prolongation of extending on Width in rear view.Rear wall 99 is set to the back of antetheca 98 and across between sidewall 97, the front angled surface 102 along sidewall 97 recedes downwards simultaneously.
(3) back rest
As shown in Figure 11 and the 12A, the back rest 111 is arranged on the rear side of four bulging subelements 23 arranged side by side on the fore-and-aft direction, and between pair of side plates 121 across.
The back rest 111 usefulness synthetic resin material monolithics are molded and be included in the pair of sidewalls 112 that faces with each other on the Width, and between this oppose side wall 112 across bridge joint wall 113.
Bridge joint wall 113 has the rectangular-plate-shaped of basic prolongation and extends on Width in rear view.Bridge joint wall 113 vertically erect and between pair of sidewalls 112 across.
The front wall surfaces of bridge joint wall 113 is the rear-inclined surface 115 downward sweptback flat surfaces along sidewall 112.
Grip part, distally (rear side grip part) 116 is arranged on the transverse center of bridge joint wall 113.Grip part, distally 116 comprises the recess 117 that forms to lower recess by the top edge that makes bridge joint wall 113 in rear view, with three limits that form rectangle in rear view and the back handle 118 that is connected with the top edge of bridge joint wall 113.
The air vent 119 that has the rectangular shape of basic prolongation in rear view is formed between recess 117 and the back handle 118 and passes through at air-flow direction (fore-and-aft direction) with the permission air, hereinafter will be described.
Grip part, distally 116 is oriented to make the transverse center of its transverse center coupling back rest 111.Therefore, behind building drum unit 21, the transverse center of grip part, distally 116 is positioned on the straight line X1 of the transverse center of passing through drum subelement 23 on the fore-and-aft direction, as shown in Figure 6.
(4) side plate
As shown in Figure 11 and the 12A, pair of side plates 121 is arranged to make it it to be clipped in the middle from two transverse edges of front-axle beam 96, four drum subelements 23 and the back rest 111.
Side plate forms with the material with linear expansion coefficient lower than the synthetic resin material that is used to form bulging subelement 23.For example, side plate 121 usefulness metals or fibre reinforced resin form, and the most handy metal forms.
Each side plate 121 has the rectangular-plate-shaped of the upwardly extending basic prolongation in front and back in side view.When building drum unit 21, as described later, side plate 121 is formed in the face of front-axle beam 96 arranged side by side on fore-and-aft direction, drum subelement 23 and the back rest 111, thereby leading edge is faced front-axle beam 96 and back edge is faced the back rest 111.Side plate 121 also forms and makes top edge face the ridge 84 of body side frame part 71 and the lower limb that feather edge is faced body side frame part 71.
As the flange part 122 of locking portion form on the fore-and-aft direction across the top edge of each side plate 121 and on Width, stretch out.Top edge by outwardly-bent side plate 121 on Width forms flange part 122 to form L shaped xsect.Flange part 122 can be fitted in the track 164 (seeing Figure 20) of the bulging accommodation section 161 that hereinafter will describe and slidably as guide portion.
Four light transmission through holes 123 are formed in the top edge of each side plate 121, and when body side frame part 71 was installed on the bulging subelement 23, transmission through hole 123 was used for admitting the projection 75 of each drum subelement 23.
Four light transmission through holes 123 are formed in the top edge of side plate 121 on fore-and-aft direction at certain intervals.As shown in figure 17, when body side frame part 71 is installed on the bulging subelement 23 and developer box 22 when being installed on the bulging subelement 23, with the window 142 (seeing Figure 17) and protruding 75 positions aligning of developer box 22, light transmission through hole 123 is formed in the manhole that penetrates side plate 121 on the thickness direction on Width.
As shown in Figure 12 A,, be used for when body side frame part 71 is installed on the bulging subelement 23, admitting the axial end of each drum axle 27 along four shaft through-holes 124 of lower limb formation of each side plate 121.
Four shaft through-holes 124 are formed in the lower limb of side plate 121 at certain intervals along fore-and-aft direction.Shaft through-hole 124 is square openings, when body side frame part 71 is installed on the bulging subelement 23, with the position to the axial end of drum axle 27 above the Width on, shaft through-hole 124 penetrates side plate 121 on thickness direction.More specifically, each shaft through-hole 124 has the shape of basic rectangle in side view, and its parallel sided is in fore-and-aft direction and vertical direction, as shown in Figure 13 A.The top of shaft through-hole 124 and preceding neighboring form two with the cross one another straight line of approximate right angle.These neighborings form aftermentioned by the surface in contact 131 of drum axle 27 in a plurality of some contacts.
Any side on the fore-and-aft direction of shaft through-hole 124 a little above the position, pair of engaging hole 126 is formed in each side plate 121 corresponding to each shaft through-hole 124.Being formed on one of conjugate foramen 126 in the right plate 121 forms continuously with central opening 133 described later.
As shown in Figure 13 A, 13B and the 13C, on the inner wall surface of right plate 121, wire spring 127 is engaged with and is used for the axle location in the pair of engaging hole 126.Wire spring 127 is made of the steel wire of basic V-arrangement in the side view, and two upper ends are outwardly-bent on Width.
All along the inner wall surface setting of side plate 121, its upper end is bonded in the pair of engaging hole 126 each wire spring 127.Therefore, wire spring 127 is maintained on the side plate 121 between the pair of engaging hole 126, thereby the central area is recessed down with V-arrangement when seeing from the side.Further, wire spring 127 is oriented to make its rear side upwards to cross shaft through-hole 124 diagonally backward.
As shown in Figure 11 and the 12A, preceding bolt hole 128 is formed on the leading edge near each side plate 121, the position relative with the preceding bolt receptacle 103 of sidewall base portion 100 when side plate 121 is installed on the front-axle beam 96.Bolt 136 is inserted into preceding bolt hole 128.
Further, back bolt hole 129 is formed on the back edge near each side plate 121, the position relative with the bolt receptacle 114 of sidewall 112 when side plate 121 is installed on the back rest 111.Bolt 136 is inserted into back bolt hole 129.As shown in Fig. 5,7,11 and 14, connect inner via hole 130 be formed in the left plate 121 when side plate 121 be installed in bulging subelement 23 and developer box 22 when being installed on the bulging subelement 23 on Width corresponding to the position of the passive connection gear 144 of developer box 22.
Four connect inner via hole 130 is formed on side plate 121 at certain intervals on fore-and-aft direction vertical centre.Connect inner via hole 130 for when being installed on the bulging subelement 23 when body side frame part 71 at the circular port that on thickness direction, penetrates side plate 121 on the Width corresponding to the position of the connection inner via hole 74 of left side frame part 71.
Four centre bolt through holes 132 (seeing Figure 11) also are formed in the left plate 121 position of the bolt receptacle 85 of left side frame part 71 when being installed on the bulging subelement 23 when side plate 121.Bolt 136 is inserted into centre bolt through hole 132.Four centre bolt through holes 132 are in the position that is formed on certain interval on the fore-and-aft direction between corresponding connection inner via hole 130 and the shaft through-hole 124.
As shown in Figure 12 A, 15A and the 15B, central opening 133 is formed in the right plate 121.When side plate 121 is installed on the bulging subelement 23, central opening 133 will be arranged on the outside that electric wire electrode 80 on the right side frame part 71 and gate electrode 81 are exposed to right plate 121 on the Width.Four central openings 133 form with certain interval along fore-and-aft direction.Central opening 133 is big openings, the adaptive adaptive wall 94 that comprises electric wire electrode 80 of its shape, and can admit gate electrode 81.
Further, front openings 134 is formed on the front side of each central opening 133 in the right plate 121.Front openings 134 plays when side plate 121 is installed on the bulging subelement 23 function that developer roll electrode 82 is exposed to outside the right plate 121 on Width.Four front openings 134 form when side plate 121 is installed on the bulging subelement 23 corresponding to central opening 133 and are positioned in above the Width developer roll electrode 82.
Further, rear openings 135 is formed on the rear side of each central opening 133 in the right plate 121.Rear openings 135 plays and will clean electrode 83 be exposed to function outside the right plate 121 when side plate 121 is installed on the bulging subelement 23 on Width.Four rear openings 135 form when side plate 121 is installed on the bulging subelement 23 corresponding to central opening 133 and are positioned at above the Width cleaning electrode 83.
(5) assembling of drum unit
At first, four bulging subelements 23 are arranged on fore-and-aft direction adjacent to each other.As shown in Figure 11 and the 12A, for adjacent bulging subelement 23, the front surface of the body side frame part 71 in back drum subelement 23 is configured to contact with the rear surface of body side frame part 71 in the preceding bulging subelement 23.Like this, drum subelement 23 on fore-and-aft direction side by side, simultaneously downwards and recede.
Next, front-axle beam 96 is arranged to adjacent to top bulging subelement 23, and the back rest 111 is arranged to adjacent to rearmost bulging subelement 23.When the front-axle beam 96 that is provided with adjacent to top bulging subelement 23, the front surface of the body side frame part 71 in the bulging subelement 23 up front is configured to contact with the front angled surface 102 of front-axle beam 96.Further, when the back rest 111 that is provided with adjacent to rearmost bulging subelement 23, in the end the rear surface of the body side frame part 71 in the bulging subelement 23 of face is configured to contact with the rear-inclined of the back rest 111 is surperficial.
Next, side plate 121 is arranged on two transverse end of the front-axle beam arranged on the fore-and-aft direction 96, four drum subelements 23 and the back rest 111, and is fixed on these parts by bolt 136.
When left plate 121 being attached to the left side of front-axle beam 96, four drum subelements 23 and the back rest 111, as shown in Figure 11, on Width, the preceding bolt hole 128 of side plate 121 aligns with the preceding bolt receptacle 103 on front-axle beam 96 left sides, and the back bolt hole 129 of left plate 121 aligns with the bolt receptacle 114 on the back rest 111 left sides.The centre bolt through hole 132 of left plate 121 is aliging with the bolt receptacle 85 on drum subelement 23 left sides on the Width.
Next, the inner wall surface of left plate 121 is configured to contact with ridge 84 on the left side frame part 71, thereby the left end of drum axle 27 is inserted into the shaft through-hole 124 of left plate 121.Simultaneously, in the projection 75 of the body side frame part 71 in each drum subelement 23 left side is fitted to light transmission through hole 123 in the left plate 121, thereby projection outwards exposes on Width.Be fitted to by the projection 75 with left side frame part 71 in the light transmission through hole 123 of left plate 121, drum subelement 23 is limited with respect to left plate 121 around 27 rotations of drum axle.
As shown in Figure 11, bolt 136 is inserted into preceding bolt hole 128 and is threaded in the preceding bolt receptacle 103, and disengagement bolts 136 is inserted into back bolt hole 129 and is threaded in the bolt receptacle 114 simultaneously.Also have, other bolt 136 is inserted into centre bolt through hole 132 and is threaded in the bolt receptacle 85.Like this, as shown in Figure 14, left plate 121 is attached to the left side of front-axle beam 96, drum subelement 23 and the back rest 111.
When right plate 121 being attached to the right side of front-axle beam 96, four drum subelements 23 and the back rest 111, as shown in Figure 12 A, on Width, the preceding bolt hole 128 of right plate 121 aligns with the preceding bolt receptacle 103 on front-axle beam 96 right sides.Simultaneously, the back bolt hole 129 of right plate 121 is aliging with the bolt receptacle 114 on the back rest 111 right sides on the Width.
Next, the inner wall surface of right plate 121 is configured to contact with ridge 84 in the body side frame part 71 on drum subelement 23 right sides, thereby the right-hand member of drum axle 27 is inserted into the shaft through-hole 124 of right plate 121, the projection 75 of correct frame part 71 is fitted in the light transmission through hole 123 of right plate 121, thereby projection 75 outwards exposes on Width.Further, the adaptive wall 94 that rouses subelement 23 is fitted in the central opening 133 that is formed in the right plate 121.Be fitted to by the projection 75 with right side frame part 71 in the light transmission through hole 123 of right plate 121, drum subelement 23 is limited with respect to right plate 121 around 27 rotations of drum axle.
As shown in Figure 12 A, before bolt 136 is inserted into bolt hole 128 and back bolt hole 129 and be threaded into before in bolt receptacle 103 and the bolt receptacle 114.Like this, as shown in Figure 15 A, right plate 121 is attached to the right side of front-axle beam 96, drum subelement 23 and the back rest 111.
As shown in Figure 14,15A and the 15B, when drum unit 21 by as when assembling above-mentionedly, the transverse end that is supported on the drum axle 27 in pair of side frames part 71 of each drum subelement 23 is inserted in the shaft through-hole separately 124 of side plate 121.The diameter of shaft through-hole 124 is bigger than the diameter of drum axle 27 (perpendicular to the size of the xsect of drum axle 27 on axially).As shown in Figure 13 A, 13B and the 13C, the part of wire spring 127 is upwards crossed shaft through-hole 124 backward on to the angular direction.As shown in Figure 13 C, when the transverse end of drum axle 27 is inserted into shaft through-hole 124, rouses axle 27 osculatory springs 127 and make wire spring 127 diagonal angle distortion backward downwards a little.Here, in Figure 13 C, dotted line is presented at the shape of the wire spring 27 before the drum axle 27 insertion shaft through-holes 124.Therefore, the axle head of drum axle 27 by wire spring 127 diagonally forward and upwards towards with drum axle 27 face above and the surface in contact 131 of front promote.Therefore, wire spring 127 is at the axle head of a contact point by drum pressure axle 27.Drum axle 27 also on a plurality of contact points contacts with the surface in contact 131 of front.Like this, the axial end of drum axle 27 accurately is positioned between the pair of side plates 121 by 3 contacts.
When drum unit 21 is assembled by this way, as shown in Figure 14, be formed on connection inner via hole 130 in the left plate 121 connection inner via hole 74 on Width to left side frame part 71.
When drum unit 21 as above-mentioned being assembled, as shown in Figure 15 A and the 15B, gate electrode 81 and electric wire electrode 80 outwards expose on Width by the central opening 133 that is formed in the right plate.Further, developer roll electrode 82 outwards exposes on Width by front openings 134, and cleaning electrode 83 outwards exposes on Width by rear openings 135.
3, developer box
Figure 16 is the rear view of developer box 22.Next, will be described in detail with reference to figs. 2 to 6,16 and 17 developer box.
(1) developer box
Described with reference to Figure 16 as mentioned, developer box 22 is constructed such that developer roll 34 is by the bottom-exposed of opening 36 from developer frame 31.The development roll shaft 45 (Figure 17) of developer roll 34 rotatably is supported in the sidewall 141 of developer frame 31, and the transverse end of development roll shaft 45 is 141 outstanding from the two side on Width.Conducting ring member 50 covers the transverse end of development roll shaft 45.
As shown in Fig. 3 and 17, in order to detect the quantity of remaining toner in the toner container cavity 37, window 142 is embedded in the two side 141 of definition toner container cavity 37.Optical sensor 173 emissions that are made of photocell 174 described later and light receiving element 175 (see figure 8)s are used for detecting optically the detection light of remaining toner quantity in toner container cavity 37.Window 142 allows to detect light and pass through toner container cavity 37 on Width.
Gear mechanism (not having to show) is arranged on the left side wall 141 of developer box 22.Gear mechanism is covered by gear cap 143 (Figure 17).Gear mechanism comprise the passive connection gear 144 (Figure 17) that exposes by gear cap 143 and with the passive gear 144 meshed gears series (not showing) that connect.
Connection input shaft 145 (see figure 5)s described later are arranged in the main casing 2.Connecting input shaft 145 can advance on the axial direction of turning axle 41 and return, and can engage with passive connection gear 144, and it can not be rotated with respect to passive connection gear 144.Be transferred to connection input shaft 145 from the driving force that is arranged on the motor (not having to show) in the main casing 2.
Gear series comprises the stirrer-driven gear that engages with the turning axle 41 of stirrer 32, donor rollers driven wheel that engages with the supply roll shaft 43 of donor rollers 33 and the developer roll driven wheel that engages with the development roll shaft 45 of developer roll 34.These gears connect gear 144 engagements by neutral gear etc. with passive.
As shown in Fig. 5 and 17, developer box grip part 146 is arranged on the developer frame 31.Developer box grip part 146 is arranged on the transverse center of the developer frame 31 on the upper wall 147 and comprises by making the handle 149 of upper wall 147 on recess 148 that lower recess forms and the back edge that is arranged on recess 148.
As shown in FIG. 6, recess 148 has the shape of basic rectangle and forms by excision leading edge portion in planimetric map, when developer box 22 is installed in the drum unit 21, forms towards the deep recess of the developer box adjacent in the front side 22.
Handle 149 is arranged on the back edge of recess 148 and extends on Width.Handle 149 is included in the sidewall 150 that is positioned at recess 148 two ends on the Width and the center wall 151 of bridging side wall 150.
Each sidewall 150 all is leg-of-mutton shape in outboard profile and narrows down towards rear side.Sidewall 150 extends upward from two transverse end of recess 148.Center wall 151 between the coboundary of sidewall 150 across.The handle 149 that forms by this way allows the user to insert finger and catch the inner wall surface of center wall 151 upwards to pull out developer box 22 from the front side by recess 148.
Developer box grip part 146 is oriented to make its transverse center to align with the transverse center of developer frame 31.In other words, as shown in FIG. 6, when developer box 22 was installed in the drum unit 21, the transverse center of developer box grip part 146 was positioned in the straight line X1 of the transverse center of passing through drum subelement 23 on the fore-and-aft direction.
(2) developer box is installed in drum unit
As shown in FIG. 5, when in the bulging subelement 23 that the developer box 22 of every kind of color is installed to every kind of color in the drum unit 21, developer box 22 at first is inserted into above drum unit 21 the bulging subelement 23 corresponding to this developer box 22.
More specifically, ring element 50 on the axial end of development roll shaft 45 is inserted in the guiding groove 73 of the body side frame part 71 that is formed on corresponding bulging subelement 23, and is pushed downwards in the bulging subelement 23 when ring element 50 developer box 22 when guiding groove 73 slides.When the deep of ring element 50 contact guidance grooves 73, this contact restriction developer box 22 is pushed to darker.In this state, developer roll 34 contacts with photosensitive drums 24.By this process, developer box 22 is installed in the corresponding bulging subelement 23, as shown in FIG. 4.
When developer box 22 was installed in the corresponding bulging subelement 23, the ring element 50 on the horizontal right-hand member of development roll shaft 45 was connected to the developer roll electrode 82 that is arranged on the right side frame part 71.
Further, when developer box 22 is installed in the corresponding bulging subelement 23, as as shown in Fig. 7 and 8, be embedded in the left side wall 141 of developer frame 31 left window 142 be formed on left side frame part 71 in projection 75 and be formed on light transmission through hole 123 in the left plate 121 and be relevant to Width and align and pass through to allow detecting light.Similarly, be embedded in right window 141 in the right side wall 141 of developer frame 31 on Width be formed on right side frame part 71 in projection 75 and be formed on light transmission through hole 123 in the right plate 121 and align and pass through to allow detecting light.
Further, as shown in FIG. 5, the passive connection gear 144 that exposes by the gear cap 143 that is arranged on the left side wall 141 on Width be formed on left side frame part 71 in connection inner via hole 74 and the connection inner via hole 130 that is formed in the left plate 121 align, to allow to connect input shaft 145 by these through holes insertions with return.
When all developer boxes 22 were installed in the bulging subelement 23, as shown in Figure 6, alignd on fore-and-aft direction in the grip part, distally 116 of the nearside grip part 104 of front-axle beam 96, the developer box grip part 146 of developer box 22 and the back rest 111.More specifically, the transverse center of these parts is positioned on the straight line X1 of the transverse center of passing through drum subelement 23 on the fore-and-aft direction.
Further, when all developer boxes 22 are installed in the bulging subelement 23, insert recess 148 by pointing from the front side of recess 148, catch the inner wall surface of center wall 151 and the handle 149 that makes progress, each developer box 22 can both upwards be pulled out.
Therefore, all developer boxes 22 are installed in the bulging subelement 23 of drum unit 21 after, as shown in fig. 1, drum unit 21 is installed in the described later bulging accommodation section 161 of main casing 2.At this moment, printer 1 can form to operate on the paper 3 and form coloured image according to above-mentioned image.
4, main casing
Figure 18 is the skeleton view that shows the drum unit 21 in the main casing 2 that is installed in laser printer 1.Figure 19 is the skeleton view of the laser printer 1 among the cut Figure 18 of a part.Figure 20 is the skeleton view that shows the drum unit 21 that partly is drawn out from main casing 2.Figure 21 is the skeleton view of the drum unit 21 after demonstration removes from main casing 2.
Next, main casing 2 will be described with reference to Figure 18 to 21.
(1) main casing
As shown in Figure 18, main casing 2 has the box-like of basic rectangle and in front openings in lateral plan.Drum accommodation section 161 is formed on and is used for holding drum unit 21 in the main casing 2.The bulging opening 162 that is communicated with drum accommodation section 161 is formed in the antetheca 170 of main casing 2.
As shown in FIG. 1, protecgulum 163 is arranged on the antetheca 170 of main casing 2, is used for covering or exposes rousing opening 162.Protecgulum 163 is rotatably supported by the hinge on the lower limb that is arranged on bulging opening 162 (not showing), and it can be opened and closed on main casing 2.Therefore, in order to cover bulging opening 162 (off-position), protecgulum 163 can be around the hinge rotary closing, and in order to expose bulging opening 162 (open position), protecgulum 163 can be around the hinge Unscrew.When drum opening 162 when being exposed, drum unit 21 can by drum opening 162 from the installed in front of main casing 2 drum accommodation section 161 or therefrom remove.
As shown in Figure 19 and 20, track 164 is arranged on and is used for the adaptive slidably flange part 122 that is arranged on the side plate 121 on the drum unit 21 in the bulging accommodation section 161.Main casing 2 has sidewall 165 respect to one another on Width.Guide rail 164 is arranged on the inner wall surface of sidewall 165 and extends upward on the position respect to one another and in front and back on the Width.Each guide rail 164 comprises upper rail 166 and the lower guideway 167 that vertically faces with each other and have the enough big spacing that can insert flange part 122.
As shown in Fig. 1 and 19, pipeline 168 is arranged in the main casing 2, is used for discharging the hot-air of main casing 2 and extracts the ozone that charger 25 produces out.When drum unit 21 was installed in the bulging accommodation section 161, pipeline 168 was formed on the rear side of drum unit 21.Exhaust port 169 is formed in the pipeline 168 towards preceding position.
Form operating period at image, the air in main casing 2 is extracted out by the exhaust port 169 that is formed in the pipeline 168, shown in arrow at Fig. 1 to 9, produces the air-flow from the front side to rear side between scanning element 17 and drum unit 21.Hot-air in main casing 2 and at first be raised to space between scanning element 17 and the drum unit 21 from the ozone that charger 25 produces, and be carried away along air-flow by outlet opening 169.
Owing to be formed on grip part, distally 116 center dants 117 of the back rest 111 and the air vent 119 (Figure 19) between the back handle 118 in the airflow direction upper shed, air can flow and discharges by exhaust port 169 by air vent 119.
When drum unit 21 is installed in the bulging accommodation section 161, as shown in Figure 5, the connection input shaft 145 corresponding to passive connection gear 144 is inserted into corresponding connection inner via hole 130 that is formed in the left plate 121 and the corresponding connection inner via hole 74 that is formed in the body side frame 71 that is arranged on left plate 121 inboards on the Width.Connect output shaft 145 and connected, it can not be rotated with respect to passive connection gear 144 with the corresponding passive gear 144 that connects of each developer box 22.
When drum unit 21 was installed in the main casing 2, the end that connects input shaft 145 was inserted in the groove of cutting in the passive connection gear 144 (not showing), thereby forms the joint that is used for transmitting driving force.Further, when drum unit 21 removes from main casing 2, push away towards the center of drum unit 21 and connect input shaft 145 by at first being relevant to left and right directions, (being disengaged) withdrawed from the end that connects input shaft 145 from the groove of passive connection gear 144.
In developer box 22 with this structure, connecting input shaft 145 will be sent to passive connection gear 144 from the driving force of motor (not having to show), and passive connection gear 144 drives stirrer 32, donor rollers 33 and developer roll 34 rotations by gear series.
Connect input shaft 145 and be arranged in the main casing 2 position corresponding to each passive connection gear 144.Be relevant to the opening and closing operation of protecgulum 163, connect input shaft 145 towards passive connection gear 144 stretching, extensions or from its withdrawal.Particularly, when protecgulum 163 is opened, connect input shaft 145, therefore throw off connection from it from passive connection gear 144 withdrawals.When protecgulum 163 is closed, connects input shaft 145 and advance and connect with it towards passive connection gear 144.
As shown in FIG. 8, in order to detect the toner quantity that remains in the toner container cavity 37, optical sensor 173 is provided with optical sensor 173 for each developer box 22.Each optical sensor 173 is included in the both sides of drum unit 21 photocell 174 positioned opposite to each other and light receiving element 175 (at the photocell 174 on right side with at the light receiving element 175 in left side).
When corresponding developer box 22 is installed in the drum unit 21 and drum unit 21 when being installed in the bulging accommodation section 161, photocell 174 and light receiving element 175 are positioned in the outside of a pair of light transmission through hole 123 on the Width, and on Width to light transmission through hole 123.
Have this structure, by being fitted to the projection 75 the right light transmission through hole 123, enter toner container cavity 37 and by toner container cavity 37 by right window 142 from the detection light of photocell 174 emission.Detect light and leave toner container cavity 37 by left window 142 then, by being fitted to the projection 75 in the left light transmission through hole 123 and being detected by light receiving element 175.
The terminal that is connected to the high-tension circuit plate (not having to show) that is arranged in the main casing 2 is connected to each electric wire electrode 80 and the gate electrode 81 that exposes by the central opening 133 that is formed in the right plate 121, by the developer roll electrode 82 of front openings 134 exposures and the cleaning electrode 83 that exposes by rear openings 135.
(2) remove drum unit from main casing
In order to remove the drum unit 21 the bulging accommodation section 161 from its installment state, at first, the protecgulum 163 shown in Fig. 1 is opened to expose bulging opening 162 around its hinge.As shown in Figure 18, at the pull-out direction of drum unit 21 (forwards to), nearside grip part 104 is arranged on the nearside (in the front side and the downstream of pull-out direction) of front-axle beam 96, thereby nearside grip part 104 can be exposed on bulging opening 162 neutralizations by 162 operations of drum opening.
When drum unit 21 is installed in the bulging accommodation section 161, be relevant to the pull-out direction of drum unit 21, grip part, distally 116 is arranged on the distally (at the rear side and the upstream side of pull-out direction) of the back rest 111.Therefore, when protecgulum 163 was opened, grip part, distally 116 was not exposed in the bulging opening 162, therefore can not be operated.
As shown in Figure 20, when operator grasps nearside grip part 104 and when drawing drum unit 21 forward, flange part 122 is directed along guide rail 164.Particularly, when drum unit 21 is drawn forward, flange part 122 between upper rail 166 and lower guideway 167 to front slide.
After further pulling out drum unit 21 forward, as shown in figure 21, flange part 122 separates from guide rail 164, thereby drum unit 21 can freely be pulled out from drum accommodation section 161.When drum unit 21 was drawn forward out from the point that separates drum accommodation section 161, the grip part, distally 116 that is arranged on the distally of drum unit 21 on pull-out direction was exposed in the bulging opening 162 and can be held at this moment.
Therefore, when drum unit 21 separated from rousing accommodation section 161, the operator can hold grip part, distally 116 and nearside grip part 104 simultaneously, and can mention and carry drum unit 21 under an action.
5, the operation and the effect of drum unit assembling
In the printer 1 aspect above-mentioned, the drum unit 21 with four bulging subelements 23 can be installed in main casing 2 neutralizations as a unit and therefrom remove.Therefore, the structure of printer 1 can prevent to change obscuring corresponding to the bulging subelement 23 of different colours such as user error ground.Further, the structure that bulging subelement 23 has been simplified bulging subelement 23 is set between pair of side plates 121, thus simplified manufacturing technique and minimizing cost.During maintenance job, can only change the bulging subelement 23 that needs repairing, thereby reduce maintenance cost.And this structure is dismantled easily and is convenient to and recycles.
Further, when adjacent bulging subelement 23 is connected to each other, can imagine the accumulation of the positioning error between photosensitive drums 24.Yet when independently rousing subelement 23 as using pair of side plates 121 to connect in the structure aspect this, the positioning error of photosensitive drums 24 can not accumulated, thereby has improved the degree of accuracy of location photosensitive drums 24.
When the transverse end of drum axle 27 is inserted in the shaft through-hole separately 124 of side plate 121, the part of wire spring 127 upwards and backward to the angular direction on cross shaft through-hole 124, as shown in Figure 13 C.When the transverse end of drum axle 27 is inserted in the shaft through-hole 124, rouses axle 27 osculatory springs 127 and make wire spring 127 distortion that it is moved diagonally backward downwards.Therefore, the axial end of drum axle 27 is promoted forward and upwards diagonally by the surface in contact 131 of wire spring 127 towards top and front.Therefore, wire spring 127 is at the axial end of a contact point by drum pressure axle 27.And the axial end of drum axle 27 also on a plurality of contact points contacts with the surface in contact 131 of front.Like this, the axial end of drum axle 27 is accurately positioned between pair of side plates 121 by 3 contacts.Therefore, the degree of accuracy of locating each photosensitive drums 24 can be further improved.Further, this structure can reach accurate localization by simple structure.
Further, side plate 121 is formed by the material with linear expansion coefficient lower than the synthetic resin material that is used to form bulging subelement 23.For example, side plate 121 is formed by metal or fibre reinforced resin, and the most handy metal forms.Therefore, side plate 121 can be guaranteed the rigidity of drum unit 21, and can reach the more accurate localization to photosensitive drums 24.Further, form side plate 121 simplified manufacturing techniques and can reduce cost by metal or fibre reinforced resin.Because the transverse end of drum axle 27 is inserted into the shaft through-hole 124 that is formed in the side plate 121 and contacts with the side plate 121 that is positioned to shaft through-hole 124 places, side plate 121 can be used as the ground connection of photosensitive drums 24 when being formed by metal.This structure does not need specific grounded parts, thereby reduces the quantity of the parts that require.
In the printer 1 aspect above-mentioned, when drum unit 21 being installed in the bulging accommodation section 161 of main casing 2 or therefrom removing drum unit 21, the flange part 122 of side plate 121 fits between the upper rail 166 and lower guideway 167 of guide rail 164.Guide rail 164 guiding flange portions 122, so developer box 22 can slide on fore-and-aft direction between upper rail 166 and lower guideway 167, rolls paper and changes the required attended operation of parts thereby be convenient to remove.
The front-axle beam 96 and the back rest 111 respectively in the front and back of drum unit 21 side across between pair of side plates 121.Therefore, the front-axle beam 96 and the back rest 111 can improve the rigidity of drum unit 21.
Further, nearside grip part 104 and grip part, distally 116 are separately positioned on the front-axle beam 96 and the back rest 111.Therefore, drum unit 21 can be by holding nearside grip part 104 and grip part, distally 116 is operated.As a result, this structure has been strengthened operability.
Further, be detachably mounted in the bulging subelement 21 in the drum unit 21 corresponding to every kind of color developers box 22 corresponding to every kind of color.Therefore, can only change the corresponding developer box 22 of each drum subelement 23 to reduce operating cost.
When drum unit 21 is installed in the bulging accommodation section 161 of main casing 2, connection input shaft 145 corresponding to each passive connection gear 144 is inserted into connection inner via hole 130 that is formed in the left plate 121 and the connection inner via hole 74 that is formed in the left side frame part 71 that is arranged on side plate 121 inboards on the Width, and be connected to the corresponding passive connection gear 144 of developer box 22, it can not be rotated with respect to passive connection gear 144.Therefore, by transmitting from the driving force that is arranged on the motor (not having to show) the main casing 2 to passive connection gear 144 from connecting input shaft 145, this structure can drive stirrer 32, donor rollers 33 and developer roll 34 rotations of each developer box 22 reliably.
Further, each drum subelement 23 has the pair of side frames part 71 that supports photosensitive drums 24, and across the central frame part 72 that between body side frame part 71, is used to support charger 25.Charger 25 can be reliably along the axial direction setting of photosensitive drums 24.And charger with the regulation septal surface to photosensitive drums 24.This structure guarantees that reliable electric charge can be applied to photosensitive drums 24.
Be fitted to by the ring element 50 on two transverse end that will be arranged on the development roll shaft 45 in the developer box 22 in the guiding groove 73 of the body side frame part 71 that is formed on bulging subelement 23, with by along guiding groove 73 slip ring members 50, developer box 22 is installed in the bulging subelement 23.Therefore, developer box 22 can be installed in the bulging subelement 23 reliably.
In the right plate 121 of above-mentioned drum unit 21, electric wire electrode 80 and gate electrode 81 expose by central opening 133, and developer roll electrode 82 exposes by front openings 134, and cleaning electrode 83 exposes by rear openings 135.Therefore, this structure can connect reliably, and each terminal all is connected to the high-tension circuit plate (not showing) that is arranged in the main casing 2.
Further, pair of side frames part 71 and central frame part 72 are formed in the above-mentioned bulging subelement 23 separatedly.If body side frame part 71 and central frame part 72 are integrally formed, owing to shift out the difficulty of parts, will require complicated mould, and molded operation also will become more complicated from mould, cause cost to increase inevitably.
Yet,, just can simplify mould structure and improve the efficient of molded operation, thereby can reduce cost by forming body side frame part 71 and central frame part 72 discretely and assembling these parts subsequently as described above to form bulging subelement 23.
In above-mentioned bulging subelement 23, the relative position of pair of side frames part 71 is determined by the drum axle 27 of photosensitive drums 24.Therefore and since body side frame part 71 and central frame part 72 when assembling with the drum axle 27 of photosensitive drums 24 as reference, drum axle 27 is enhanced with respect to the bearing accuracies of drum subelement 23.
Further, as as shown in Figure 15 B, when building drum unit 21, the projection 75 of body side frame part 71 of each drum subelement 23 is fitted in the light transmission through hole 123 in the pair of side plates 121, is used for limiting bulging subelement 23 with respect to the rotation of pair of side plates 121 around drum axle 27.Therefore, rousing subelement 23 can be accurately positioned with respect to pair of side plates 121.
Further, as shown in Figure 8, be fitted to by projection 75 in the light transmission through hole 123 of side plate 121 body side frame part 71, by being fitted to the projection 75 the right light transmission through hole 123, enter toner container cavity 37 and by toner container cavity 37 from the detection light of photocell 174 emission by right window 142.Subsequently, detect light and leave toner container cavity 37, by being fitted to the projection 75 in the left light transmission through hole 123, and detected by light receiving element 75 by left window 142.Therefore, this structure can accurately detect remaining toner quantity in the toner container cavity 37.
6, drum unit operation and the effect installing and remove
In above-mentioned printer 1, the drum unit 21 that is equipped with four bulging subelements 23 can be installed in the main casing 2 or therefrom removes as a unit.More specifically, the operator can pull out drum unit 21 from main casing 2, thereby by the nearside grip part 104 of holding on the antetheca 98 that is arranged on front-axle beam 96 drum unit 21 is slided on fore-and-aft direction along discharge dish 64.The nearside of nearside grip part 104 place's drum units 21 on pull-out direction.Subsequently, except nearside grip part 104, the operator also can mention drum unit 21 by the grip part, distally 116 of holding on the bridge joint wall 113 that is arranged on the back rest 111.Grip part, distally 116 is arranged on the distally on drum unit 21 pull-out directions.Therefore, drum unit 21 is being pulled out the step of main casing 2 and mentioning and remove between the step of drum unit 21, the user need not discharge the nearside grip part 104 of drum unit 21.When in main casing 2 drum unit 21 being installed, the user also need not discharge the handle of nearside grip part 104.Therefore, the drop danger of drum unit 21 of this structure decrease user is convenient to its installation and is removed.
Further, nearside grip part 104 is arranged on the transverse center of above-mentioned antetheca 98, and grip part, distally 116 similarly is arranged on the transverse center of bridge joint wall 113 simultaneously, thereby nearside grip part 104 is arranged on position reciprocity mutually on the Width with grip part, distally 116.Particularly, the position of nearside grip part 104 and grip part, distally 116 position on Width and drum unit 21 transverse center promptly the straight line X1 of the center of gravity by drum unit 21 align.Therefore, by holding nearside grip part 104 and grip part, distally 116, the user can easily stablize drum unit 21, thereby further is convenient to the installation of drum unit 21 and removes.
Further, when drum unit 21 was installed in the bulging accommodation section 161, the pipeline 168 that is arranged in the main casing 2 was positioned in the back of drum unit 21, and was formed on exhaust port 169 in the pipeline 168 towards preceding.Air vent 119 is formed between grip part, distally 116 center dants 117 and the back handle 118 on fore-and-aft direction the position to the exhaust port 169 of pipeline 168.The air-flow (shown in the arrow among Fig. 1 and 19) that forms when the air in the main casing 2 is extracted out by the exhaust port in the pipeline 168 169 is followed the direction by air vent 119.Therefore, air vent 119 has reduced the quantity that grip part, distally 116 is applied to the resistance to flow of air-flow.As a result, the hot-air in the main casing 2 and can follow air-flow and extracted out by pipeline 168 reposefully, and the disturbance that does not produce air-flow from the ozone that charger 25 produces.
In above-mentioned drum unit 21, be detachably mounted in the corresponding bulging subelement 23 corresponding to the developer box 22 of every kind of color.Therefore, when one of developer box 22 needs to change, can only change the relevant developer box 22 in the corresponding drum subelement 23.
Further, developer box grip part 146 transverse center that is arranged on developer box 22 is equivalent to the position of the lateral attitude of nearside grip part 104 and grip part, distally 116 on Width.In other words, developer box grip part 146 is in the center on the straight line X1 of the center of gravity by drum unit 21.Therefore, when holding developer box 22, the user can easily find and hold developer box grip part 146.
Further, the leading edge of excision developer box grip part 146 in the recess of basic rectangular shape is formed on the recess 148 in the developer box grip part 146 during by observation in planimetric map.Therefore, when developer box 22 was installed in the bulging subelement 23, recess 148 was towards adjacent developer box 22 openings of front side.Recess 148 plays the effect in the space that is used for when holding developer box grip part 146 inserting finger, and is convenient to the processing of developer box grip part 146 and does not need to form unnecessary space between adjacent developer box 22.
Further, when drum unit 21 is installed in the bulging accommodation section 161 of main casing 2, is arranged on nearside grip part 104 on the front-axle beam 96 and is set at nearside on drum unit 21 pull-out directions.Therefore, nearside grip part 104 is exposed in the bulging opening 162 and can be easily held.On the contrary, when drum unit 21 is installed in the bulging accommodation section 161, is arranged on grip part, distally 116 on the back rest 111 and is set at distally on drum unit 21 pull-out directions.Therefore, grip part, distally 116 is not exposed in the bulging opening 162 and can not be operated at this moment when protecgulum is opened.Yet, when drum unit 21 is in installment state, nearside grip part 104 is exposed and can be operated, make the user can hold nearside grip part 104 and pull out drum unit 21 towards user's (forward), the guide rail 164 of throwing off in the main casings 2 up to the flange part 122 of side plate 121 separates from drum accommodation section 161 with drum unit 21.When drum unit 21 will be when separate drum accommodation section 161, the grip part, distally 116 that is arranged on the distally on drum unit 21 pull-out directions is exposed in the bulging opening 162 and can be operated at this moment.The point of this structural limitations drum unit 21 between installment state and released state removes from drum accommodation section 161, thereby prevents that the user from pulling out drum unit 21 because of carelessness.
In above-mentioned printer 1, the antetheca 170 of main casing 2 is equipped with dish opening 172 that is communicated with the dish accommodation section 171 that holds paper dish 7 and the bulging opening 162 that is communicated with the bulging accommodation section 161 that holds drum unit 21.Have this structure, paper dish 7 can remove from main casing 2 on identical direction with drum unit 21, has improved the operability of printer 1.
7, the modification of drum unit
Figure 22 is the skeleton view of seeing from the left side of drum unit 21 (having rotatable nearside grip part).Figure 23 shows the skeleton view that is installed in the drum unit 21 in the main casing 2.Figure 24 is the skeleton view that shows the drum unit 21 that removes from main casing 2.Figure 25 be from the bottom left of the drum unit 21 that is equipped with the forward foot in a step 110 and the rear foot 120 see skeleton view.Figure 26 is the left side view at the drum unit shown in Figure 25 21.Figure 27 A is the side view according to the side plate 121 of the location of the drum axle 27 in first modification explanation left plate 121.Figure 27 B is the zoomed-in view how display line spring 127 promotes Figure 27 A of drum axle 27.
Next, the modification of drum unit will be described with reference to Figure 22 to 33C, and wherein identical part and assembly are repeated in this description avoiding with identical reference numerals.
(1) first modification
Figure 22 has shown a kind of possible modification of nearside grip part 104.This modification comprises that installing plate 109, hinge 108 and the process hinge 108 of the antetheca 98 that is fixed to front-axle beam 96 rotatably are supported on the handle 107 on the installing plate 109.
Each installing plate 109 all is L shaped substantially thin plate in front view and forms by two.A vertically extending installing plate 109 is thin plates of the fundamental triangle that narrows down to the top in side view.A formed hole is passed the bottom of fundamental triangle plate and penetrate this plate on thickness direction (left and right directions).Another piece plate of composition installing plate 109 curves the right angle with first block of plate substantially from its lower end and stretches out at Width.
Handle 107 has basic U font and comprises basis end and the basic free end of holding of bridge joint that faces one another with spacing in plan view.Hinge 108 is arranged on the relative position on the inner surface of essential part.
Thereby two installing plates 109 are fixed to the width center symmetry that front-axle beam 96 is relevant to front-axle beam 96, have basic L font in front view, and thereby be aligned to make hole that the set square bottom forms on left and right directions relative to each other.Hinge 108 is fitted in these holes, and handle 107 is installed on the installing plate 109 through hinge 108.By this structure, the free end of handle 107 rotatably is supported on the end of basis around hinge 108 with respect to installing plate 109 (drum unit 21 that just comprises front-axle beam 96).Yet, the L shaped installing plate 109 of another piece of basic end in contact of handle 107 and therefore be limited to forward to the orientation that is lower than level.Therefore, handle 107 is limited in the scope shown in Figure 22 arrow around hinge 108 rotations.More specifically, in left side view, handle 107 can turn clockwise from 0 ° (being called plumbness thereafter) to 90 ° (being called horizontality thereafter), and 0 ° is orientation upwards here.
This structure has been arranged, as shown in figure 23, when the user when drum unit 21 is pulled out in the bulging accommodation section 161 of main casing 2, the handle of being held by the user 107 is in horizontality.Therefore, pulling force effectively is sent to drum unit 21, makes the user pull out drum unit 21 from main casing 2 reposefully.When the user when after main casing 2 is pulled out drum unit 21, mentioning drum unit 21, handle 107 rotates to horizontality shown in Figure 24 around hinge 108.By this way, put forward power and can effectively be sent to drum unit 21.By back handle 118 and the handle 107 of holding distally grip portions 116, the user can easily mention drum unit 21.
Further, when when main casing 2 is pulled out drum unit 21, the grip part, front side that is made of handle 107, hinge 108 and installing plate 109 does not cause interference, mentions drum unit 21 and be convenient to the user.
(2) second modification
The forward foot in a step 110 is affixed to the bottom of sidewall shank 101 in the modification that Figure 25 shows.Aspect above-mentioned, sidewall shank 101 forms the part of the sidewall 97 of front-axle beam 106.This modification also comprises the rear foot 120 of the bottom of the sidewall 112 that is arranged on a part that constitutes the back rest 111.
The forward foot in a step 110 forms continuously with sidewall shank 101 and continues from sidewall shank 101 outstanding diagonally backward downwards.The rear foot 120 form continuously with sidewall 112 and the feather edge of the sidewall 112 from its rear side further outstanding downwards.
As shown in figure 26, when the user is being positioned over drum unit 21 on the table after main casing 2 removes drum unit 21 or on other surfaces the time, thereby a gap is kept on the forward foot in a step 110 and the rear foot 120 these surfaces of contact between this surface and photosensitive drums 24.Therefore, the forward foot in a step 110 can prevent because photosensitive drums 24 contacts the damage to photosensitive drums 24 that this surface causes with the rear foot 120.Therefore, this structure can be placed on the table or other surperficial processing eases that make drum unit 21 of going up by making drum unit 21.
(3) the 3rd modification
In the drum unit 21 aspect above-mentioned, the transverse end that wire spring 127 upwards promotes drum axle 27 forward diagonally to top and front contact surface 131 in the face of drum axle 27, thus drum axle 27 is positioned between the pair of side plates 121 by 3 contacts.But shown in Figure 27 A and 27B, wire spring 127 can be substituted and be configured to the axial end that upwards promotes drum axle 27 diagonally backward to top and back surface in contact 231 in the face of drum axle 27, is positioned between the pair of side plates 121 by 3 contacts equally.
More specifically, shown in Figure 27 A and 27B, the shaft through-hole 124 that is formed on the side plate 121 is the shape of basic rectangle in side view, have side parallel on fore-and-aft direction and parallel in vertical direction side.Therefore, two straight lines with basic right angle intersection are followed in the top of shaft through-hole 124 and neighboring, back, and are formed in the surface in contact 231 of contact drum axle 27 on a plurality of points.
In drum unit 21 with this structure, when the end of drum axle 27 was inserted into shaft through-hole 124, the wire spring 127 that upwards intersects forward diagonally with shaft through-hole 124 was to a transverse end that upwards promotes to rouse spools 27 in the face of the top of drum axle 27 and back surface in contact 231 diagonally backward.Therefore, the transverse end of drum axle 27 is pressed on a contact point by wire spring 127 and contact top and back surface in contact 231 on a plurality of contact points.Therefore, the transverse end of drum axle 27 is accurately positioned between pair of side plates 121 by 3 contacts.
Further, by shown in Figure 27 A and 27B, the pushing direction of wire spring 127 being set at diagonally upwards backward, the pushing direction Y1 of wire spring 127 is in the axial centre of radially passing through drum axle 27, thereby the imaginary plane L1 of installation direction Y2 both directed in orthogonal of the pushing direction Y1 of wire spring 127 and installation developer box 22 is relevant to the rear side of fore-and-aft direction.That is, pushing direction Y1 points to and is relevant to the identical side perpendicular to the vertical imaginary plane L1 of fore-and-aft direction with installation direction Y2.Therefore, the straight line Y1 of wire spring 127 can be set to the identical side of direction that presses photosensitive drums 24 with developer roll 34, thereby further improves the accuracy of photosensitive drums 24 location.
(4) the 4th modification
In the drum unit 21 aspect above-mentioned, the pair of side frames part 71 that constitutes each drum subelement 23 is formed the unit that separates with central frame part 72, as shown in Figure 9.Yet, as shown in figure 28, can form a body side frame part 71 with central frame part 172 integral body, such as left side frame part 71L.
In bulging subelement 23 as shown in figure 28, central frame part 172 and left side frame part 71L are molded with the synthetic resin material monolithic, but right side frame part 71 usefulness synthetic resin material separation ground is molded.
(4-1) body side frame part
Formed right side frame part 71 is identical with the right side frame part 71 of above-mentioned aspect.
Left side frame part 71L by with central frame part 172 integrally formed rear frame parts 181 with separate the front side frame part 182 that forms with rear frame part 181 and constitute.
Though do not show among the figure, drum support unit 76 forms in rear frame part 181 in order to supporting above-mentioned photosensitive drums 24, and an axle insertion through hole 78 rouse support unit 76 in be formed centrally and on its thickness direction, penetrate rear frame part 181.An above-mentioned ridge 84 forms in the upper area of the upwardly extending rear frame part 181 in front and back.
The front end face that rear side recess 183 is arranged on rear frame part 181 is formed on the recessed arc of backward directions midway.Rear frame part 183 and the front side recess 184 of the front side frame part of next describing 182 form position and above-mentioned developer box 22 together the passive relative connection inner via hole 74 of gear 144 that connects.
Front side frame part 182 has the plate shape of fundamental triangle in side view and narrows down to the bottom.Front side frame part 182 thereon side rear end face with the front end face of rear frame part 181 form when developer box 22 be installed in the bulging subelement 23 or when it removes in order to the guiding groove 73 of guiding developer box 22.
Above-mentioned another ridge 84 is formed on the upper area of the front side frame part 182 of fore-and-aft direction extension.
Above-mentioned protruding 75 are formed on the below of ridge 84 on the front side frame part 182.As in aspect this, projection 75 is configured to when developer box 22 is installed in the bulging subelement 23 on Width the window 142 to developer box 22.
(4-2) central frame part
(Figure 28 does not show the Unitarily molded and whole inner panel 87 that is provided in central plate 86 that extends on the Width and the right-hand member that is arranged on central plate 86 on Width of central frame part 172 and above-mentioned rear frame part 181; See Fig. 9).
In aspect above-mentioned, charger holding unit 88 is arranged on the central plate 86; Discharge electric wire 28 extends in charger holding unit 88; And grid 29 remain on discharge electric wire 28 belows.Thereby the discharge electric wire clearer 89 of clamping discharge electric wire 28 is kept and can be slided on Width by charger holding unit 88.
Further, as aspect above-mentioned, brush holding unit 93 is arranged on the central plate 86 charger holding unit 88 belows in order to the brush 68 that keeps clean.
As shown in Figure 9, inner panel 87 is formed in the right-hand member of its Width from central plate 86 crooked and extensions forward.Inner panel 87 shapes are triangle substantially and narrow down forward in side view.Columniform axle insertion section 90 is arranged on the leading edge of inner panel 87 in order to admit drum axle 27.
Further, bolt receptacle 91 is formed on inner panel 87 outer wall surface from inner panel 87 in the back edge of two vertical end and on Width and extends internally along central plate 86.Bolt 92 is screwed into bolt receptacle 91 in order to right side frame part 71 is attached to central frame part 72.
(4-3) rouse the assembling of subelement
As shown in figure 28, right side frame part 71 is arranged on the right side of the Width of central frame part 172.Columniform axle insertion section 90 (see figure 9)s of central frame part 172 are inserted in the receptacle 77 of right side frame part 71.Simultaneously, align with insertion through hole 78 on Width in columniform insertion section 90.Right side frame part 71 is with respect to central frame part 172 location, thereby the tapped through hole 79 of body side frame part 71 aligns with the bolt receptacle 91 of central frame part 172 on Width.Next, bolt 92 is inserted into tapped through hole 79 and is screwed into bolt receptacle 91, thereby the right side of Width that right side frame part 71 is attached to central frame part 172 is to finish the assembling of the bulging subelement with structure similar to above-mentioned aspect.By this assembling process, right side frame part 71, the rear frame part 181 of central frame part 172 and left side frame part 71L is mounted to together (integral part that after this is called as bulging subelement 23), and the front side frame part 182 separated settings of left side frame part 71L.
(4-4) assembling of drum unit
When with bulging subelement shown in Figure 29 29 building drum unit 21, the front side frame part 182 of left side frame part 171 is installed in each and rouses on the subelement 23 corresponding left plates 121.When on left plate 121, each front side frame part 182 being installed, front side frame part 182 is positioned in the inboard of left plate 121 on Width, thereby the inner wall surface of the ridge of front side frame part 182 84 contact left plates 121, and the projection 75 of front side frame part 182 is fitted in the light transmission through hole 123 of side plate 121, thereby projection 75 is outwards exposed at Width.
At this moment, the bolt receptacle 186 of front side frame part 182 is oriented to connect the auxiliary bolt patchhole 187 that inner via hole 130 forms previously in left plate 121 relative.Bolt 185 is inserted into auxiliary bolt patchhole 187 and is screwed into bolt receptacle 186, thereby front side frame part 182 is fixed to left plate 121.
Next, arrange adjacent to each other on fore-and-aft direction as the integral part of the bulging subelement 23 of above-mentioned four of being assembled.When arranging the integral part of four bulging subelements 23, the front end face that the rear end face of the right side frame part 71 in the integral part of front side drum subelement 23 is configured to the right side frame part 71 in the integral part with rear side drum subelement 23 contact, and the rear end face in the bottom of the rear frame part 181 of front side drum subelement 23 is configured to contact with the front end face of the bottom of the rear frame part 181 of rear side drum subelement 23.This structure has been arranged, and the integral part of drum subelement 23 can be with downward being oriented on the fore-and-aft direction side by side backward.
Next, similar to above-mentioned aspect, front-axle beam 96 is arranged to the integral part adjacent to the most forward bulging subelement 23, and the back rest 111 is arranged to the integral part adjacent to the bulging subelement 23 after leaning on most.Further, side plate 121 is positioned in the both sides of the Width of the integral part of 96, four bulging subelements 23 of fore-and-aft direction front-axle beam arranged side by side and the back rest 111.As described in above-mentioned aspect, side plate 121 usefulness bolts 136 are assembled to front-axle beam 96, the integral part and the back rest 111 of drum subelement 23.
When side plate 121 is assembled to the left side of integral part, is formed on centre bolt through hole 132 in the left plate 121 and on Width, aligns with the bolt receptacle 85 that forms in the rear frame part 181 of integral part.Next, the inner wall surface of left plate 121 is configured to contact with the ridge 84 of rear frame part 181 in the integral part, thereby the left end of drum axle 27 is inserted into the shaft through-hole 124 that forms in the left plate 121.
Next, bolt 136 is inserted into centre bolt through hole 132 and is screwed into bolt receptacle 85, thereby finishes the assembling of left plate 121 in drum subelement 23 left sides, as shown in figure 30.At this moment, rear frame part 181 and front side frame part 182 are alternately arranged on fore-and-aft direction, form guiding groove 73 between the rear end face of the front end face of rear frame part 181 and front side frame part 182 in body side frame part 171.Simultaneously, connect between the corresponding front side recess 184 that inner via hole 74 is formed on the rear side recess 183 of rear frame part 181 and front side frame part 182.In other words, rear frame part 181 and each front side frame part 182 coupled inner via hole 74 on fore-and-aft direction is disconnected from each other.
(4-5) operation of the 4th modification and effect
By rear frame part 181 and the central frame part 172 of integral body formation left side frame part 71L, the bulging subelement 23 shown in Figure 28 has reduced the quantity of the parts that require, thereby has reduced manufacturing cost.
Further, since left side frame part 71L by with central frame part 172 integrally formed rear frame parts 181 with separate the front side frame part 182 that forms with rear frame part 181 and constitute, just can be by forming the quantity that rear frame parts 181 reduce the parts that require with central frame part 172 is whole, and by separate the rigidity that forms front side frame part 182 raising left side frame part 71L with rear frame part 181.
Just, when left side frame part 71L is formed by integral body, connect the recessed intensity that has reduced body side frame part 71L of inner via hole, cause left side frame part 71L such as damage along the edge break that connects inner via hole 74 owing to making.
Yet, when body side frame part 71L at the coupled inner via hole of fore-and-aft direction 74 separately when forming rear frame part 181 and front side frame part 182, the intensity of body side frame part 71L does not have coupled inner via hole 74 to reduce, thereby guarantees the intensity of rear frame part 181 and front side frame part 182.
Further, because rear frame part 181 whole formation the among central frame part 172 and the left side frame part 71L, keep the central frame part 72 of charger 25 to locate, thereby improve the accuracy of location with respect to side plate 121 and rear frame part 181 integral body.
In bulging subelement 23 as shown in figure 28, left side frame part 71L and central frame part 172 whole formation, and the 71 separated formation of right side frame part.But, can form right side frame part and the separated formation of left side frame part 71L with central frame part 172 integral body.Perhaps can wholely form left side frame part 71L, right side frame part 71 and central frame part 172.
(5) the 5th modification
In the drum unit 21 aspect above-mentioned, the developer box 22 of every kind of color separates setting and is removably mounted in the corresponding bulging subelement 23 with corresponding bulging subelement 23.But developer box 22 and bulging subelement 23 separately can wholely form.In this situation, can change versicolor toner, developer roll 34 and photosensitive drums 24 simultaneously by changing bulging subelement 23.
(6) the 6th modification
Figure 31 is the skeleton view that shows the drum unit in the main casing (having rotatable nearside grip part) that is installed in according to the printer of the 6th modification.Figure 32 A to 32C describes protecgulum towards the motion of off-position and the handle sectional view towards the zone that comprises protecgulum and handle of the rotation of deposit position.
In above-mentioned first modification, handle 107 is limited in the scope shown in the arrow of Figure 22 around the rotation of hinge 108.Just, see that from the left side handle 107 can forward along clockwise direction the levels operation position behind the half-twist of upright position from 0 ° upright position to.But, can provide the deposit position that describes below to replace the upright position.
Particularly, deposit position can be set to the position shown in the dotted line among Figure 22, is in the position that rotates (for example 20 °) from 0 ° vertical direction clockwise a little at this position handle 107.Here, the rotation of handle 107 be limited in above-mentioned from deposit position (20 ° position this example) in the scope of operating position (horizontal level).At deposit position, continue driving handle 107 from the component in sense of rotation of the weight of handle 107 and rotate to operating position.Therefore, if user's support handle 107 not, handle 107 will rotate to operating position from deposit position at once.
As shown in figure 31, deposit guiding piece 190 be arranged on the protecgulum 163 be contained in bulging accommodation section 161 in the relative position of handle of drum unit 21.Deposit guiding piece 190 be positioned in protecgulum 163 on the Width the width center the position relative to each other, both sides and constitute by a pair of rib that on direction, prolongs perpendicular to Width.Each is deposited guiding piece 190 and constitutes by the parallel portion 199 that is basically parallel to protecgulum 163 surface extensions when protecgulum 163 is in off-position in vertical direction with the continuous teat 200 that form and that give prominence to drum unit 21 slightly in the bottom of parallel portion 199.
Therefore, shown in Figure 32 A, when protecgulum 163 when open position moves to off-position, the teat of depositing guiding piece 190 midway 200 contact positions during this moves are at the far-end of the handle 107 of operating position.At this moment, deposit the far-end that guiding piece 190 is applied to pressure on handle 107.By the expulsive force of depositing the handle 107 that the guiding piece 190 applied pressures antagonism rotational component by the weight of handle 107 causes, and handle 107 begins to rotate to deposit position from operating position.
Shown in Figure 32 B, when protecgulum 163 further when off-position is rotated, the far-end of handle 107 slides along the parallel portion 199 of depositing guiding piece 190.Here, depositing guiding piece 190 continues to exert pressure to the far-end of handle 107 in that handle 107 is turned on the direction of deposit position.
Shown in Figure 32 C, handle 107 is finished its rotation to deposit position when protecgulum 163 has rotated to off-position.At this moment, depositing guiding piece 190 continues to exert pressure to the handle 107 that is on the deposit position.
When handle 107 be in deposit position and protecgulum 163 be in off-position and subsequently from off-position when open position moves, be removed by depositing the pressure that guiding piece 190 is applied on the handle 107, because the expulsive force of above-mentioned himself weight is rotated handle 107 fast to operating position.
This structure has been arranged, when drum unit 21 is installed in the bulging accommodation section 161, if protecgulum 163 rotates to off-position, be associated with the motion of protecgulum 163, handle 107 rotates to deposit position.Therefore, this structure does not need to carry out the independent operation in order to mobile protecgulum 163 and rotary handle 107, thereby improves the operability of drum unit 21 and printer 1.
Further, when drum unit 21 is installed in the bulging accommodation section 161, if protecgulum 163 rotates to open position, be associated with the motion of protecgulum 163, handle 107 rotates to operating position.Therefore, this structure does not need to carry out the independent operation in order to mobile protecgulum 163 and rotary handle 107, thereby improves the operability of drum unit 21 and printer 1.
Further, the guiding piece 190 of depositing in this structure is tied to the rotation of handle 107 between operating position and deposit position with the opening and closing campaign of protecgulum 163 smoothly, thereby improves the operability of drum unit 21 and printer 1.
8, the modification of color printer
Above-mentioned aspect relates to directly image is transferred to tandem type color laser printer 1 on the paper 3 from photosensitive drums 24, but the invention is not restricted to this situation.For example, the present invention can be applied to the toner image that is constructed to provisionally every kind of color and be transferred to intermediate transfer member from Electrifier frame, photoreceptor, and at once combination picture is transferred to the intermediate transfer type color laser printer on the paper subsequently.
Claims (50)
1, a kind of tandem photosensitive-member unit is characterized in that, comprising:
A plurality of photosensitive-member holding units, in these a plurality of photosensitive-member holding units each all extends upward and keeps the Electrifier frame, photoreceptor of every kind of color in the multiple color in first party, described a plurality of photosensitive-member holding units are arranged on the second direction perpendicular to first direction; With
Each is all in the upwardly extending pair of side plates of second party, and this is arranged in the two ends of a plurality of photosensitive-member holding units of being arranged to side plate with respect to first direction,
Wherein said tandem photosensitive-member unit is configured to as a whole, and the unit is removably mounted in the main body of image processing system.
2, tandem photosensitive-member unit as claimed in claim 1 is characterized in that, wherein each Electrifier frame, photoreceptor tool all
Axle is arranged; And
Wherein said pair of side plates comprises that the location remains on the axle location division of the axle of each Electrifier frame, photoreceptor in the described photosensitive-member holding units.
3, tandem photosensitive-member unit as claimed in claim 2 is characterized in that, wherein said pair of side plates forms axis hole in the position corresponding to each;
Wherein each is inserted into axis hole separately; And
Wherein said axle location division comprises:
Be arranged on the surface in contact of the neighboring of described axis hole, this neighboring forms along two imaginary crossing lines; With
Pushing part, this pushing part are in the face of described axle, so that this axle is between this pushing part and the surface in contact, described pushing part promotes described axle towards described surface in contact.
4, tandem photosensitive-member unit as claimed in claim 1 is characterized in that, wherein a plurality of photosensitive-member holding units are formed by first material with first linear expansion coefficient; And
Wherein said pair of side plates is formed by second material with second linear expansion coefficient that is lower than first linear expansion coefficient.
5, tandem photosensitive-member unit as claimed in claim 4 is characterized in that, wherein said pair of side plates is formed by fibre reinforced resin.
6, tandem photosensitive-member unit as claimed in claim 4 is characterized in that, wherein said pair of side plates is formed by metal.
7, tandem photosensitive-member unit as claimed in claim 1, it is characterized in that, wherein said pair of side plates is equipped with locking portion, this locking portion and the guide portion that is arranged on the image processing system main body are adaptive slidably, remove thereby allow described tandem photosensitive-member unit to be slidably mounted within the main body of image processing system or from image processing system.
8, tandem photosensitive-member unit as claimed in claim 1 further is included in a pair of beam that sets up between the described pair of side plates, and this is arranged in the two ends of described a plurality of photosensitive-member holding units with respect to second direction to beam.
9, tandem photosensitive-member unit as claimed in claim 8 further comprises the grip part at least one that is arranged in the described a pair of beam.
10, tandem photosensitive-member unit as claimed in claim 1, it is characterized in that, further comprise the developer unit on each photosensitive-member holding units that is removably mounted in a plurality of photosensitive-member holding units, this developer unit keeps providing to Electrifier frame, photoreceptor the developer bearing member of developer.
11, tandem photosensitive-member unit as claimed in claim 10 is characterized in that, wherein said tandem photosensitive-member unit is installed in the image processing system neutralization and removes from image processing system on second direction;
Wherein said pushing part promotes the axle of described Electrifier frame, photoreceptor on the pushing direction of the axial centre by described axle radially;
Wherein each developer unit is installed in the tandem photosensitive-member unit on installation direction; And
Wherein said pushing direction points to a side identical with installation direction with respect to the imaginary plane perpendicular to second direction.
12, tandem photosensitive-member unit as claimed in claim 10, it is characterized in that, be formed with on the described pair of side plates and be used to insert first patchhole that drives transport unit, described driving transport unit is sent to described developer unit with driving force from the main body of image processing system.
13, tandem photosensitive-member unit as claimed in claim 10 is characterized in that, further comprises the charhing unit that is kept by each photosensitive-member holding units in a plurality of photosensitive-member holding units, and this charhing unit is described Electrifier frame, photoreceptor charging,
Each photosensitive-member holding units in wherein a plurality of photosensitive-member holding units comprises:
The pair of side frames part that on first direction, has certain distance therebetween and face one another; With
The central frame part of setting up between described pair of side frames part, this central frame part supports described charhing unit along first direction.
14, tandem photosensitive-member unit as claimed in claim 13, it is characterized in that the guide portion that wherein said pair of side frames has partly that the described developer unit of guiding is installed in the described photosensitive-member holding units or removes from described photosensitive-member holding units.
15, tandem photosensitive-member unit as claimed in claim 13 is characterized in that, each photosensitive-member holding units in wherein a plurality of photosensitive-member holding units all comprises the power supply unit that applies voltage to charhing unit; And wherein said pair of side plates is formed with the opening that exposes described power supply unit on first direction towards the photosensitive-member holding units outside.
16, tandem photosensitive-member unit as claimed in claim 13, it is characterized in that, wherein said pair of side frames partly is formed with and is used to insert second patchhole that drives transport unit, and this driving transport unit is sent to described developer unit with driving force from the main body of image processing system.
17, tandem photosensitive-member unit as claimed in claim 13 is characterized in that, each the body side frame part in the wherein said pair of side frames part partly forms the member that separates with central frame.
18, tandem photosensitive-member unit as claimed in claim 13 is characterized in that, at least one the body side frame part in wherein said central frame part and the described pair of side frames part is formed by whole.
19, tandem photosensitive-member unit as claimed in claim 18 is characterized in that, at least one body side frame in the wherein said pair of side frames part partly comprises:
With integrally formed first separated part of described central frame part; With
With second separated part of first separating part from formation.
20, tandem photosensitive-member unit as claimed in claim 19, it is characterized in that, wherein said pair of side frames partly is formed with and is used to insert second patchhole that drives transport unit, and this driving transport unit is sent to described developer unit with driving force from the main body of image processing system; And
Wherein first separated part and second separated part are at the second patchhole place separately.
21, tandem photosensitive-member unit as claimed in claim 17 is characterized in that, the two ends of wherein said pair of side frames part back shaft; And
Wherein many offsides frame part is relative to each other located through axle.
22, tandem photosensitive-member unit as claimed in claim 13 is characterized in that, wherein said pair of side plates is formed with the rotation limiting holes; And
Wherein said pair of side frames partly comprises and fits in the described rotation limiting holes and limit the rotation restrictions that described pair of side frames part is pivoted with respect to described pair of side plates.
23, tandem photosensitive-member unit as claimed in claim 22 is characterized in that, wherein said developer unit has to transmit and is used for the window of detection light that optical detection is contained in the developer quantity of described developer unit; And
Wherein said rotation restrictions have cylindrical profile and on detect the direction that light is transmitted to described window.
24, tandem photosensitive-member unit as claimed in claim 23 is characterized in that, wherein said pair of side frames part is formed with the light transmission through hole to position of window on the direction that detection light is transmitted.
25, tandem photosensitive-member unit as claimed in claim 23 is characterized in that, wherein said pair of side plates is formed with the light transmission through hole to position of window on the direction that detection light is transmitted.
26, a kind of image processing system is characterized in that, comprising:
Main body; With
Be configured to be removably mounted on the tandem photosensitive-member unit in the described main body, this tandem photosensitive-member unit comprises:
A plurality of photosensitive-member holding units, in these a plurality of photosensitive-member holding units each all extends upward and keeps the Electrifier frame, photoreceptor of every kind of color in the multiple color in first party, described a plurality of photosensitive-member holding units are arranged on the second direction perpendicular to first direction; With
Each is all in the upwardly extending pair of side plates of second party, and this is arranged in the two ends of a plurality of photosensitive-member holding units of being arranged to side plate with respect to first direction,
Wherein said tandem photosensitive-member unit is configured to as a whole, and the unit is removably mounted in the described main body.
27, image processing system as claimed in claim 26 is characterized in that, wherein each Electrifier frame, photoreceptor all has axle; And
Wherein said pair of side plates comprises that the location remains on the axle location division of the axle of each Electrifier frame, photoreceptor in the described photosensitive-member holding units.
28, image processing system as claimed in claim 27 is characterized in that, is formed with axis hole in the position corresponding to each on the wherein said pair of side plates;
Wherein each is inserted into axis hole separately; And
Wherein said axle location division comprises:
Be arranged on the surface in contact of the neighboring of described axis hole, this neighboring forms along two imaginary crossing lines; With
Pushing part, this pushing part are in the face of described axle, so that this axle is between this pushing part and the surface in contact, described pushing part promotes described axle towards described surface in contact.
29, image processing system as claimed in claim 26 is characterized in that, wherein a plurality of photosensitive-member holding units are formed by first material with first linear expansion coefficient; And
Wherein said pair of side plates is formed by second material with second linear expansion coefficient that is lower than first linear expansion coefficient.
30, image processing system as claimed in claim 29 is characterized in that, wherein said pair of side plates is formed by fibre reinforced resin.
31, image processing system as claimed in claim 29 is characterized in that, wherein said pair of side plates is formed by metal.
32, image processing system as claimed in claim 26 is characterized in that, wherein said main body has the guide portion that described tandem photosensitive-member unit was installed or removed in guiding; And
Wherein said pair of side plates has locking portion, and this locking portion and described guide portion are adaptive slidably, removes from described main body so that described tandem photosensitive-member unit is slidably mounted within described main body neutralization.
33, image processing system as claimed in claim 26 is characterized in that, wherein said tandem photosensitive-member unit further is included in a pair of beam that sets up between the described pair of side plates; And
Wherein said a pair of beam is with respect to the two ends that are arranged in a plurality of photosensitive-member holding units in second direction.
34, image processing system as claimed in claim 33 is characterized in that, wherein said tandem photosensitive-member unit further comprises the grip part at least one that is arranged in the described a pair of beam.
35, image processing system as claimed in claim 26 is characterized in that, wherein said tandem photosensitive-member unit further comprises the developer unit on each photosensitive-member holding units that is removably mounted in a plurality of photosensitive-member holding units; And
Wherein said developer unit keeps providing to Electrifier frame, photoreceptor the developer bearing member of developer.
36, image processing system as claimed in claim 35 is characterized in that, wherein said tandem photosensitive-member unit is installed in the image processing system neutralization and removes from image processing system on second direction;
Wherein said pushing part promotes the axle of described Electrifier frame, photoreceptor on the pushing direction of the axial centre of radially passing through axle;
Wherein each developer unit is installed in the tandem photosensitive-member unit on installation direction; And
Wherein said pushing direction points to a side identical with installation direction with respect to the imaginary plane perpendicular to second direction.
37, image processing system as claimed in claim 35, it is characterized in that, be formed with on the wherein said pair of side plates and be used to insert first patchhole that drives transport unit, described driving translator unit is sent to described developer unit with driving force from the main body of image processing system.
38, image processing system as claimed in claim 35 is characterized in that, wherein said tandem photosensitive-member unit further comprises the charhing unit that is kept by each photosensitive-member holding units in a plurality of photosensitive-member holding units;
Wherein said charhing unit is described Electrifier frame, photoreceptor charging,
Each photosensitive-member holding units in wherein a plurality of photosensitive-member holding units comprises:
The pair of side frames part that on first direction, has certain distance therebetween and face one another; With
The central frame part of setting up between described pair of side frames part, this central frame part supports described charhing unit along first direction.
39, image processing system as claimed in claim 38 is characterized in that, the guide portion that wherein said pair of side frames has partly that the described developer unit of guiding is installed in the described photosensitive-member holding units or removes from described photosensitive-member holding units.
40, image processing system as claimed in claim 38 is characterized in that, each photosensitive-member holding units in wherein a plurality of photosensitive-member holding units all comprises the power supply unit that applies voltage to charhing unit; And
Wherein said pair of side plates is formed with the opening that exposes described power supply unit on first direction towards the photosensitive-member holding units outside.
41, image processing system as claimed in claim 38, it is characterized in that, wherein said pair of side frames partly is formed with and is used to insert second patchhole that drives transport unit, and this driving transport unit is sent to described developer unit with driving force from the main body of image processing system.
42, image processing system as claimed in claim 38 is characterized in that, each the body side frame part in the wherein said pair of side frames part partly forms the member that separates with central frame.
43, image processing system as claimed in claim 38 is characterized in that, at least one the body side frame part in wherein said central frame part and the described pair of side frames part is formed by whole.
44, image processing system as claimed in claim 43 is characterized in that, at least one body side frame in the wherein said pair of side frames part partly comprises:
With integrally formed first separated part of described central frame part; With
With second separated part of first separating part from formation.
45, image processing system as claimed in claim 44, it is characterized in that, wherein said pair of side frames partly is formed with and is used to insert second patchhole that drives transport unit, and this driving transport unit is sent to described developer unit with driving force from the main body of image processing system; And
Wherein first separated part and second separated part are separated at the second patchhole place.
46, image processing system as claimed in claim 42 is characterized in that, the two ends of wherein said pair of side frames part back shaft; And
Wherein many offsides frame part is relative to each other located through axle.
47, image processing system as claimed in claim 38 is characterized in that, wherein said pair of side plates is formed with the rotation limiting holes; And
Wherein said pair of side frames partly comprises and fits in the described rotation limiting holes and limit the rotation restrictions that described pair of side frames part is pivoted with respect to described pair of side plates.
48, image processing system as claimed in claim 47 is characterized in that, wherein said developer unit has to transmit and is used for the window of detection light that optical detection is contained in the developer quantity of described developer unit; And wherein said rotation restricted part has cylindrical profile and on detect the direction that light is transmitted to described window.
49, image processing system as claimed in claim 48 is characterized in that, wherein said pair of side frames part is formed with the light transmission through hole to position of window on the direction that detection light is transmitted.
50, image processing system as claimed in claim 48 is characterized in that, on the direction that detection light is transmitted position of window is formed with the light transmission through hole on the wherein said pair of side plates.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2005234825 | 2005-08-12 | ||
| JP2005234825 | 2005-08-12 | ||
| JP2005376112 | 2005-12-27 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1912766A true CN1912766A (en) | 2007-02-14 |
| CN100501586C CN100501586C (en) | 2009-06-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006101110343A Active CN100501586C (en) | 2005-08-12 | 2006-08-10 | Tandem photosensitive-member unit for image-forming device |
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| Country | Link |
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| CN (1) | CN100501586C (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102169300A (en) * | 2010-02-25 | 2011-08-31 | 富士施乐株式会社 | Image-forming apparatus |
| CN102566359A (en) * | 2008-05-27 | 2012-07-11 | 佳能株式会社 | Color-image forming apparatus |
| CN102650840A (en) * | 2011-02-28 | 2012-08-29 | 兄弟工业株式会社 | Image forming apparatus and holder |
| CN103279019A (en) * | 2013-06-17 | 2013-09-04 | 天津光电通信技术有限公司 | Electrode plate component for toner cartridge drawing mechanism of office equipment |
| CN104516225A (en) * | 2013-09-27 | 2015-04-15 | 兄弟工业株式会社 | Image forming device |
| CN108062018A (en) * | 2016-11-07 | 2018-05-22 | 佳能株式会社 | Photosensitive-member unit and electrophotographic image-forming apparatus |
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2006
- 2006-08-10 CN CNB2006101110343A patent/CN100501586C/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102566359A (en) * | 2008-05-27 | 2012-07-11 | 佳能株式会社 | Color-image forming apparatus |
| CN102566359B (en) * | 2008-05-27 | 2015-01-28 | 佳能株式会社 | Color-image forming apparatus |
| CN102169300A (en) * | 2010-02-25 | 2011-08-31 | 富士施乐株式会社 | Image-forming apparatus |
| CN102169300B (en) * | 2010-02-25 | 2015-02-04 | 富士施乐株式会社 | Image-forming apparatus |
| CN102650840A (en) * | 2011-02-28 | 2012-08-29 | 兄弟工业株式会社 | Image forming apparatus and holder |
| US8712283B2 (en) | 2011-02-28 | 2014-04-29 | Brother Kogyo Kabushiki Kaisha | Image forming apparatus |
| CN102650840B (en) * | 2011-02-28 | 2014-10-29 | 兄弟工业株式会社 | Image forming apparatus and holder |
| CN103279019A (en) * | 2013-06-17 | 2013-09-04 | 天津光电通信技术有限公司 | Electrode plate component for toner cartridge drawing mechanism of office equipment |
| CN104516225A (en) * | 2013-09-27 | 2015-04-15 | 兄弟工业株式会社 | Image forming device |
| CN108062018A (en) * | 2016-11-07 | 2018-05-22 | 佳能株式会社 | Photosensitive-member unit and electrophotographic image-forming apparatus |
| CN108062018B (en) * | 2016-11-07 | 2021-05-25 | 佳能株式会社 | Photosensitive member unit and electrophotographic image forming apparatus |
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| CN100501586C (en) | 2009-06-17 |
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