CN201000544Y - Carbon powder box for laser printer - Google Patents

Abstract

The utility model relates to a laser printer toner container, which comprises a toner chamber and a stirring frame. The outline of the toner chamber is a cylinder tube with the axial both ends are opened. The openings at the both ends of the cylinder tube are sealed with two chamber covers respectively. The stirring frame is a cylindrical helical loop arranged in the toner chamber. One end of the helical loop is swingingly fixed on one of the chamber covers being corresponding to the position of the toner chamber middle axle, and the opposite end suspends freely. A flexible material layer is coated on the outer part of loop core of the helical loop. The toner container has the characteristics of complete toner using and less residual quantity.

Description

Carbon powder cartridge for laser printer

Technical field

The utility model relates to carbon powder cartridge for laser printer.This cartridge comprises the powder storehouse that is used to hold storage scheduled volume carbon dust and provides the carbon dust outlet at certain position, and the Cang Gai of carbon dust port closing effect is provided at another allocation.Under the installation state, this cartridge provides the carbon dust supply for developer roll.

Background technology

Electrophotographic image forming, for example laser printer is that the fileinfo of gathering and being stored in the computing machine is formed corresponding laser beam, has the photosensitive drums of predetermined uniform potential again by the laser scanning irradiation, forms electrostatic latent image on its surface.This electrostatic latent image is developed with predetermined carbon dust, and then will be transferred on the paper, the image fixing of transfer printing acquisition, become the visual image that naked eyes can be observed afterwards,---signal---conversion between the image that realizes image thus through the image that develops.

Common laser printer is provided with charging roller, photosensitive drums, laser scanning mechanism, developing apparatus, transfer roll and fixing roller etc. in its casing.Wherein, photosensitive drums charges to the predetermined electromotive force that is evenly distributed by charging roller, and response is formed corresponding to the electrostatic latent image for the treatment of print image by the irradiation of laser scanning mechanism emitted laser bundle.Store carbon dust in the container that developing apparatus is established within it, and utilize powder feeding roller and developer roll that carbon dust is sent to the photosensitive drums that has electrostatic latent image and reach the state of even covering electrostatic latent image.The visual image that forms on the photosensitive drums is transferred on the paper between photosensitive drums and the transfer roll by transfer roll, utilizes fixing roller that the carbon dust image on the paper is given permanent photographic fixing at last.

For color-image forming apparatus, need the carbon dust of configuration multicolour usually, for example yellow, magenta, cyan and black, totally four look carbon dusts.Utilize corresponding four developer rolls or developing apparatus that overlapping one by one being covered in of the carbon dust of each single color formed coloured image on the electrostatic latent image.

Usually, as the developing apparatus of developing mechanism, its employed developer for example carbon dust is a kind of consumptive material.Carbon dust with constant volume reserves restriction is run out after the printing through some paper consumes immediately, causes replacing, additional carbon dust to become a regular job.Different production firms can propose the product design scheme of multiple version for different design concepts.For example, powder feeding roller and developer roll etc. is fitted in together, is designed to a separate unit, can be referred to as developing apparatus; Photosensitive drums, waste powder hopper, charging roller etc. are fitted in together, are designed to a separate unit, can be referred to as induction installation; Perhaps the powder storehouse separation that is used to hold a certain amount of carbon dust of storage is designed to a separate unit, can be referred to as cartridge.This split design can fully and reasonably utilize its technology potential according to the technical characteristic of each unit, for example consider the characteristic that induction installation and developing apparatus technical life are long, it is prepared into the separate unit that can freely assemble respectively so that make full use of its technical life, cartridge kept as the container that the single appearance storage of expendable carbon dust function only is provided changing or the convenient characteristic of additional carbon dust, can also bring bigger facility for links such as production, accumulating and consumer choose like this.

Yet,, yet have many links that haves much room for improvement aspect the structural design of cartridge though the manufacturer has considered developing apparatus, induction installation and cartridge three's configuration relation comparatively all sidedly.For example, existing a kind of cylindric cartridge A (see figure 2) that only is used to hold storage and supply developer, reason because of its configuration aspects, cause the carbon dust of its content storage to exist a part residual all the time, especially in print procedure when cartridge A has been consumed most carbon dust, remaining carbon dust will form nonvolatil residual powder because of being free on powder feeding mechanism for example outside the transmission reach of puddle support and residue in its powder storehouse.In addition, its puddle support normally adopts the spiral winding 124 of metal wire rod preparation, referring to Fig. 3.These spiral winding 124 axial ends freely suspend, the other end is fixed on the end cap 117 in cartridge powder storehouse 116 (referring to Fig. 2), impel its main part in cartridge powder storehouse 116, to form rotatablely moving of single direction by corresponding driving mechanism, push carbon dust outlet 115 to for example along α rotation direction rotation shown in Figure 3, and then carbon dust.Because puddle support is with the state that keeps relative motion between 116 inwalls of cartridge powder storehouse, therefore require between the different single-stage coils of puddle support spiral winding 124 under the identical prerequisite of their diameters, must to keep its axis or the center of circle to be in the coaxial or concentric of coincidence.Yet, right alignment between the different single-stage coils but is subjected to the influence such as machining precision and assembly precision, so that form the phenomenon that departs from right alignment in actual production process, causing puddle support to form with its stiff end around cartridge powder storehouse 116 (referring to Fig. 2) axis is the conical surface motion of basic point.In case this coaxial departure degree reaches certain limit, make the end that freely suspends of puddle support, even the main part of its coil 124 contact may cause puddle support to be bitten or cling because of contact point friction force is excessive, and then lose turning power when being urged to the inwall in powder storehouse 116.To this, common counter-measure is the diameter that reduces puddle support spiral winding 124, radially obtains predetermined gap between the outer edge in the hope of inwall and puddle support spiral winding 124 in cartridge powder storehouse 116, to keep the rotating function of puddle support.

The utility model content

The utility model purpose is to provide a kind of carbon powder cartridge for laser printer, and this cartridge has good carbon dust to be carried and agitation characteristics, and its carbon dust utilization is comparatively thorough, and residual quantity is low.

According to above-mentioned purpose, the utility model carbon powder cartridge for laser printer comprises powder storehouse, puddle support.The powder storehouse is that profile is the cylindrical drum that its axial both ends are opened wide.The open at both ends of this cylindrical drum is sealed respectively by two Cang Gai.Puddle support is the cylindric spiral coil that is arranged in the powder storehouse.One end of spiral coil rotatably is fixed in the position of one of two Cang Gai corresponding to powder storehouse axis, and its opposite end freely suspends.The circle core external packets of this spiral coil is covered with flexible material layer.

Aforementioned laser printer cartridge, its flexible material layer along the diametric outside surface in powder storehouse with preferably keeping in touch state between the inwall in powder storehouse.

Carbon powder cartridge for laser printer of the present utility model on the basis of existing cylindric spiral coil stereosphere core, has coated one deck by the flexible material elastomeric layer of preparation such as elastic caoutchouc for example in circle core outside.Like this, change original puddle support rigidity coil turn core with the rigidity contact condition between the inwall of cartridge powder storehouse, for the elastomeric layer of the utility model puddle support with the flexible contact condition between the inwall of cartridge powder storehouse, and then be scattered in the elastomeric layer of puddle support concentrating on the pressure of stereosphere core under original rigidity contact condition with inwall contact site, cartridge powder storehouse.So, in technical solutions of the utility model, the elastomeric layer of puddle support is in cartridge powder storehouse inwall contact process, the suffered pressure of its contact point scheme compared to prior art reduces greatly, puddle support can rotated in cartridge powder storehouse under the effect identical with original driving moment swimmingly, make the carbon dust that all is stored in the powder storehouse be delivered to meal outlet smoothly and enter in the developing apparatus, reach the carbon dust that efficiently utilizes in the cartridge powder storehouse, reduce the purpose of residual quantity.

The drawing explanation

Fig. 1 is the laser printer structural representation that includes the utility model cartridge.

Fig. 2 the utility model cartridge skeleton view.

Fig. 3 is existing cartridge fragmentary, perspective view.

Fig. 4 the utility model cartridge fragmentary, perspective view.

Fig. 5 the utility model cartridge stirs bobbin core retainer plate skeleton view.

Fig. 6 the utility model cartridge stirs bobbin core skeleton view.

Embodiment

Describe the utility model cartridge in detail below in conjunction with accompanying drawing.In institute's drawings attached, identical mark will be used to refer to identical parts, feature or structure.Embodiment introduce in the process at concrete structure or the parts reference illustration of only understanding the utility model cartridge as those skilled in the art; those skilled in the art can also design do not exceed the utility model cartridge technical scope and essence various and be equal to or the similar techniques structure under the enlightenment of this technical scheme; if it is unfavorable limiting the protection domain that the utility model cartridge claim included with this exemplary illustration thus, be equal to or the technical scheme that is similar to the utility model cartridge still belongs to the protection domain of the utility model cartridge claim.And for simple and clear needs, the applicant has omitted the description of known function and structure.

Fig. 1 shows the laser printer schematic structure of using the utility model cartridge.The applicant does one at this to the structure of laser printer and course of work and introduces roughly, so that person skilled is understood better and implemented this cartridge.This laser printer structurally comprises photosensitive drums 101, carries transfer printing assembly 107, first transfer roll 109, second transfer roll 110 and fixation unit 113 that corresponding four cartridge A (referring to Fig. 2) get four developing apparatuss 106, have transfer belt 114.

Be laid with photoconductive layer on the cylindrical surface of photosensitive drums 101, it is accepted and responds by the printer emitted laser, forms the electrostatic latent image corresponding to laser signal on photoconductive layer.Round the circumferencial direction of photosensitive drums 101, cloth is shown laser scan unit 102, four developing apparatuss 106, transfer printing assembly 107, first transfer roll 109, useless powder recovery bin 104 and charging rollers 103 successively.

Wherein, four developing apparatuss 106 are concentrated and are assemblied on the support 105.Support 105 is the rounded cylindrical rolls of its xsect.Four developing apparatuss 106 can rotate around support 105 under the drive of support 105.In four developing apparatuss 106 each all comprises the cylindrical substantially developer roll (not shown) of configuration.Developer roll in four developing apparatuss 106 is to be listed in the circumferential edge edge of support 105 with the even cloth of mode of support 105 face of cylinder inscribes.Each root developer roll makes its face of cylinder and photosensitive drums 101 keep separating each other the state of a minim gap in the mode with photosensitive drums 101 axis keeping parallelisms.Generally speaking, this gap remains on tens scopes to the hundreds of micron.Four developing apparatuss 106 connect with meal outlet 115 correspondences of four cartridge A respectively, after from its powder storehouse 116, obtaining the carbon dust of various different colors by meal outlet 115, developer roll by correspondence is listed in carbon dust cloth on the photosensitive drums 101, makes the electrostatic latent image that is formed on the photosensitive drums 101 developed (referring to Fig. 1,2,4).

Transfer printing assembly 107 comprises seamless annular transfer belt 114, two backing rolls 108,110.Two columniform backing rolls 108,110 are parallel to the mode Boulez of photosensitive drums 101 axis with its axis, they all prop up on the inner ring surface of annular transfer belt 107, make annular transfer belt 107 keep tensioning state, and drive annular transfer belt 107 around backing roll 108,110, to equal the linear velocity rotation on photosensitive drums 101 faces of cylinder.Annular transfer belt 107 photosensitive drums 101 have on axially greater than, at least equal the width of employed maximum paper 112 breadths of laser printer, on photosensitive drums 101 axial cross sections, have greater than, equal the length of employed maximum paper 112 long side directions of laser printer at least.

First transfer roll 109 is parallel to the mode Boulez of photosensitive drums 101 with its axis, it is positioned at the ring of the annular transfer belt 107 that is strutted by two backing rolls 108,110, by the inner ring surface of oppressing annular transfer belt 107 annular transfer belt 107 outer ring surfaces is close on the face of cylinder of photosensitive drums 101.First transfer roll 109 is transferred to the carbon dust image that is formed on photosensitive drums 101 faces of cylinder on annular transfer belt 107 outer ring surfaces by apply a direct current transfer bias to photosensitive drums 101.The mode cloth that second transfer roll 110 is parallel to photosensitive drums 101 with its axis is listed near one of two backing rolls 110.When annular transfer belt 107 entrained carbon dust image lines proceed to backing roll 110 positions, second transfer roll 110 provides a direct current transfer bias, the entrained carbon dust image transfer of annular transfer belt 107 between second transfer roll 110 and annular transfer belt 107 are corresponding to the position of backing roll 110 with the paper 112 that equals annular transfer belt 107 rotational line speed operation on.Paper 112 is when the working line of laser printer inside marches to fixation unit 113, pass two fixing rollers 1131,1132 of fixation unit 113, apply predetermined pressure and temperature by 1131,1132 pairs of paper 112 of two fixing rollers, the carbon dust image is for good and all solidified in self surface.

Aforementioned photosensitive drums 101 is after the bias effect that first transfer roll 109 is applied, its most carbon dusts that are arranged in the carbon dust image on photosensitive drums 101 peripheries have been transferred on the annular transfer belt 107, but the carbon dust that still has minute quantity is adsorbed on the face of cylinder, finally forms residual carbon dust.These residual carbon dusts all can cause harmful effect for the laser induced ability of 101 second rounds of photosensitive drums and sharpness of formed electrostatic latent image etc.Thus, on photosensitive drums 101 operative orientation β, be provided with along photosensitive drums 101 and axially stretch in the downstream direction of first transfer roll 109, and the useless powder recovery bin 104 that keeps in touch with photosensitive drums 101 faces of cylinder.Remove residual carbon dust or toner on photosensitive drums 101 faces of cylinder by the scraper that is provided with on the useless powder recovery bin 104, and it is stored in the useless powder recovery bin 104.Through the photosensitive drums 101 after the cleaning, by keeping in touch with photosensitive drums 101 or the charging roller 103 of adjacency state charges to its external cylindrical surface to it and reaches same electromotive force.Laser printer is just finished a complete workflow like this, enters for second work period.

Introduce the structure of the utility model cartridge A below.Referring to Fig. 2,4,5,6, cartridge A comprises mainly structurally that powder storehouse 116, storehouse cover 1, the storehouse covers 2 118 and puddle support 119.Under confined state, cartridge A is installed in the developing apparatus 106 in the mode that its length direction or its powder storehouse 116 axis directions are parallel to photosensitive drums 101.

Powder storehouse 116 face shapings approximately are the cylindrical drum shape.116 axial two ends, powder storehouse are in opening-wide state.The inner chamber of its hollow cover through storehouse described below 1 and the storehouse cover 2 118 airtight after formation be used as the container that holds and store carbon dust.The external cylindrical surface in powder storehouse 116 is provided with the 116 axially extended location-plates 120 along the powder storehouse.Location-plate 120 is 116 axial about semicirculars in shape of xsect along the powder storehouse, and keep circumscribed state at the external cylindrical surface in semicircle fracture position and powder storehouse 116, are used for cartridge A is fixed in developing apparatus 106 (referring to Fig. 1).

Referring to Fig. 2,4, the storehouse cover 1 and the storehouse cover 2 118 and be respectively applied for sealing powder storehouse 116 and be positioned at its two open ports on axially.

Wherein, the storehouse is covered one 117 end faces that point to powder storehouses 116 and rotatably is fixed with an end of puddle support 119 corresponding to the position of powder storehouse 116 axis, and the opposite end is provided with transmission gear 121.The rotary torque that transmission gear 121 produces printer passes to puddle support 119 and impels it to rotate in powder storehouse 116.

The storehouse is covered 2 118 and is had and the corresponding cylindrical shape of 116 diameters shirt rim, powder storehouse, and under confined state, this shirt rim is nested on the cylindrical wall of one of powder storehouse 116 axial two-port.The outside surface of 116 shirt rims, powder storehouse is provided with the spacer 122 corresponding to location-plate 120.The effect of spacer 122 is similar to location-plate 120, and has the operating personnel of being convenient to grip the storehouse to cover 2 118, makes it can do certain angle rotation with respect to powder storehouse 116.The storehouse cover 2 118 along about middle part of powder storehouse 116 central axis direction by the disjunction of dividing plate (not shown).Like this, 2 118 parts that are nested on 116 ports of powder storehouse are covered in the storehouse, cover 1 together with powder storehouse 116 and storehouse, and the three constitutes the container that carbon dust is held and stores in airtight being used to jointly.The 2 118 airtight bins of being told by aforementioned separator plate back to powder storehouse 116 are covered in the storehouse, promptly cover the airtight bin that a part of three of 2 118 axial end walls and shirt rim constitutes jointly, be used for collecting the carbon powder carrier that is adsorbed in aforementioned developing apparatus 106 developer roll surfaces by this dividing plate, storehouse.After the storehouse is covered 2 118 relative powder storehouses 116 rotation or reversible rotation of certain angles taken place, make at two extreme positions of the anglec of rotation to be positioned at the storehouse and to cover meal outlet 115 on 2 118 shirt rims and useless powder and collect mouthfuls 123 and be in simultaneously and open or closed condition.Meal outlet 115 is communicated with powder storehouse 116 inner chambers, and being used for that the carbon dust in the powder storehouse 116 is introduced developing apparatus 106 provides the carbon dust flow openings.Useless powder is collected mouthful aforementioned airtight bin of 123 connections, is used to provide the flow passage of aforementioned residual carbon powder carrier.

Referring to Fig. 5,6, puddle support 119 is coils of coil spring shape.It comprises adopts coil core 124 that the metal wire rod coiling obtains and by the soft resilient material coil cover 125 of rubber preparation for example.Coil core 124 is coated in the coil cover 125.Coil cover 125 and coil core 124 constitute a complete coiled type puddle support 119.Under confined state, an end of puddle support 119 is fixed in the storehouse and covers the position of the end face in one 117 sensing powder storehouses 116 corresponding to powder storehouse 116 axis, and the opposite end is in the state that freely suspends.Under the driving of transmission gear 121, puddle support 119 in the powder storehouse 116 inward turning handle carbon dusts push meal outlet 115 to.After adopting coil cover 125 to coat the mode of coil core 124, coil core 124 in the prior art and then is difficult to even the phenomenon that can not rotate in powder storehouse 116 is eliminated because departing from of causing of processing reason or assembly precision reason is coaxial.This is to should be the coil cover 125 that is coated on the coil core 124 can depart from maximum any the pressure of right alignment on the coil core 124 and be dispersed to coil cover 125 than the cause on the large tracts of land originally concentrating on.

Claims (2)

1. carbon powder cartridge for laser printer, comprise powder storehouse, puddle support, described powder storehouse is that profile is the cylindrical drum that its axial both ends are opened wide, the open at both ends of described cylindrical drum is sealed respectively by two Cang Gai, described puddle support is the cylindric spiral coil that is arranged in described powder storehouse, one end of described spiral coil rotatably is fixed in the position of one of two Cang Gai corresponding to described powder storehouse axis, the opposite end of described spiral coil freely suspends, and it is characterized in that the circle core external packets of described spiral coil is covered with flexible material layer.

2. according to the described carbon powder cartridge for laser printer of claim 1, it is characterized in that described flexible material layer keeps in touch state between the inwall of described powder storehouse outside surface radially with described powder storehouse.

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