CN201000540Y

CN201000540Y - Carbon powder box for laser printer

Info

Publication number: CN201000540Y
Application number: CNU2007200479897U
Authority: CN
Inventors: 白利民; 陈世杰
Original assignee: Print Rite Technology Development Co Ltd of Zhuhai
Current assignee: Print Rite Technology Development Co Ltd of Zhuhai
Priority date: 2007-01-23
Filing date: 2007-01-23
Publication date: 2008-01-02
Anticipated expiration: 2017-01-23

Abstract

The utility model relates to a laser printer toner container, which comprises a toner storing chamber and a stirring frame. The toner storing chamber is a cylinder cartridge with the axial end sealed with the transverse end wall. The transverse end wall is provided with an axle hole and a toner outlet. The stirring frame comprises a rotating axle and a blade. One end of the rotating axle perforating out the axle hole is fixed and connected with a transmitting gear. One end of the blade is fixed on the rotating axle, and a sliding contacting state is kept between the opposite end and the toner storing chamber. A smooth transition curved surface is arranged on the toner storing chamber axial cross section of the connecting part formed by the surface formed by the cave part corresponding to the toner outlet projecting the toner storing chamber and the cylinder-shaped surface of the toner storing chamber. The toner container has the advantage of less toner residual quantity.

Description

Carbon powder cartridge for laser printer

Technical field

The utility model relates to carbon powder cartridge for laser printer.This cartridge is used to hold the carbon dust that stores up scheduled volume, provides the carbon dust supply for developer roll under the installation state.

Background technology

Electrophotographic image forming, for example laser printer is the photosensitive drums that has predetermined uniform potential 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 predetermined equally distributed electromotive force by charging roller, and response is formed corresponding to the electrostatic latent image for the treatment of print image by 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 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, also can be for production, accumulating, link such as choose and bring bigger facility.

Yet,, remain improved link also existing aspect the utilization ratio of developer though the manufacturer has considered the configuration relation of developing apparatus, induction installation and cartridge comparatively all sidedly.For example, existing a kind of cartridge 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 has been consumed most carbon dust, remaining carbon dust will retain in the member space, forms nonvolatil residual powder.

Shown in Fig. 2 a, 2b, be the structure of a kind of known cartridge A.This cartridge A with cylindrical drum 101 as main structure body.An axial end of cylindrical drum 101 opens wide, and is sealed by hot melt or bonding way by corresponding end cap (not shown) under the formed uncovered state that carbon dust arranged in filling, and the other end is by transverse end wall 102 sealings.Space between end cap and the transverse end wall 102 becomes and is used to take in or store for example storeroom 103 of carbon dust of developer.At transverse end wall 102 and the position that cylindrical drum 101 axis overlap, be provided with circular hole 104.Shaft 106 1 ends that carry stirring piece 105 on it pass circular hole 104 backs with transmission gear 107 secure bond, and one section that stirring piece 105 is installed is suspended in the storeroom 103.Under the effect of the driving moment that transmission gear 107 is transmitted, shaft 106 drives the axis rotation of stirring piece 105 around cylindrical drum 101.Be provided with meal outlet 108 at transverse end wall 102 near the position on cylindrical drum 101 all edges.Because cartridge A generally is configured in developing apparatus or the printer with the parallel attitude of its axis, therefore, usually spirality powder delivery roller (not shown) can be set in meal outlet 108.The main part of spirality powder delivery roller stretches in the storeroom 103, and adopts to rotatablely move and be sent to the carbon dusts in the storeroom 103 near the meal outlet 108 or by meal outlet 108 storeroom 103 interior carbon dusts brought to storeroom 103 outsides.In order to cooperate the flow characteristics of carbon dust, cartridge A is provided with two zones 109,110 that concave along cylindrical drum 101 footpaths corresponding to the cylindrical wall of meal outlet 108.The position in the first recessed district 109 between meal outlet 108 and transverse end wall 102, the position in the second recessed district 110 in abutting connection with the first recessed district 109 and along cylindrical drum 101 extend axially to aforementioned uncovered near.The first recessed district 109 degree that concaves than the footpath in the second recessed district 110 is many greatly.Two recessed districts 109,110 cooperate with the developing apparatus of printer and constitute the carbon dust flow channel, make carbon dust flow into developing apparatus in airtight area of space.Yet, two recessed districts 109,110 have but occupied quite a few space of storeroom 103, and they cause carbon dust absorption, are piled up in these dead angles because indent is former thereby part that protrude in the storeroom 103 has constituted the not runny dead angle of carbon dust, can not be utilized effectively.

The utility model content

The utility model purpose is to provide a kind of carbon powder cartridge for laser printer, and this cartridge can maximally utilise the carbon dust in it, and the remaining amount of its residual powder is low.

According to above-mentioned purpose, the utility model carbon powder cartridge for laser printer comprises powder-storage bin, puddle support.Powder-storage bin is the cylindrical drum of its axial end by the transverse end wall sealing.Transverse end wall is provided with axis hole and meal outlet.Puddle support comprises rotating shaft and blade.Rotating shaft one end passes axis hole and fixedlys connected with transmission gear.Blade one end is fixed in the rotating shaft, keeps the sliding contact state between its opposite end and the powder-storage bin.The surface that protrudes in the powder-storage bin with meal outlet corresponding concave part zone has level and smooth fillet surface with the position that the powder-storage bin cylindrical surface connects on the powder-storage bin axial cross section.

Before carbon powder cartridge for laser printer, its fillet surface protrudes in recess between the cylindrical surface of surface in the powder-storage bin and powder-storage bin and keep tangent connection status respectively on the powder-storage bin axial cross section.

Carbon powder cartridge for laser printer of the present utility model, the smooth connection of tangent form is adopted at the position that surface in meal outlet protrudes in powder-storage bin connects with the powder-storage bin cylindrical surface, the powder-storage bin cylindrical surface is protruded in meal outlet keep the type of attachment of smoothly releiving between the surface in the powder-storage bin.Like this, what just can contact powder-storage bin when the puddle support blade slides almost all is parallel to its axial surface, to eliminate the dead angle that prior art exists, reduces the carbon dust residual quantity.

The drawing explanation

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

Fig. 2 a is existing cartridge skeleton view one.

Fig. 2 b is existing cartridge skeleton view two.

Fig. 3 the utility model cartridge skeleton view.

Fig. 4 the utility model cartridge STRUCTURE DECOMPOSITION synoptic diagram.

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 under the enlightenment of this technical scheme and not exceed the various of the utility model cartridge technical scope and essence and be equal to or the similar techniques structure.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 111, four developing apparatuss 112, four cartridge A, has transfer printing assembly 114, first transfer roll 115, second transfer roll 116 and the fixation unit 117 of transfer belt 113.

Be laid with photoconductive layer on the cylindrical surface of photosensitive drums 111, 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 111, cloth is shown laser scan unit 119, four developing apparatuss 112, transfer printing assembly 114, first transfer roll 115, useless powder recovery bin 118 and charging rollers 120 successively.

Wherein, each in four developing apparatuss 112 all comprises the cylindrical substantially developer roll 1121 of its configuration.The face of cylinder of each root developer roll 1121 and photosensitive drums 111 are separated a minim gap each other.Generally speaking, this gap remains on tens scopes to the hundreds of micron.Four developer rolls 1121 are around the circumferencial direction of photosensitive drums 111 Boulez successively.Four developing apparatuss 112 connect with meal outlet 108 correspondences of four cartridge A respectively, from its storeroom 103, obtain the carbon dust of various corresponding colors by meal outlet 108, so that the work of the developer roll 1121 by correspondence makes the electrostatic latent image that is formed on the photosensitive drums 111 developed (referring to Fig. 1,3,4).

Transfer printing assembly 114 comprises seamless annular transfer belt 113, two backing rolls 121,122.Two columniform backing rolls 121,122 are parallel to the mode Boulez of photosensitive drums 111 with its axis, they all prop up on the inner ring surface of annular transfer belt 113, make annular transfer belt 113 keep tensioning states, and drive annular transfer belt 113 around backing roll 121,122 to equal the rotational line speed rotation on photosensitive drums 111 faces of cylinder.Annular transfer belt 113 photosensitive drums 111 have on axially greater than, at least equal the width of employed maximum paper 123 breadths of laser printer, on photosensitive drums 111 axial cross sections, have greater than, equal the length on the employed maximum paper of laser printer 123 long limits at least.

First transfer roll 115 is parallel to the mode Boulez of photosensitive drums 111 with its axis, it is positioned at the ring of the annular transfer belt 113 that is strutted by two backing rolls 121,122, by the inner ring surface of oppressing annular transfer belt 113 annular transfer belt 113 outer ring surfaces is close on the face of cylinder of photosensitive drums 111.First transfer roll 115 is transferred to the carbon dust image that is formed on photosensitive drums 111 faces of cylinder on annular transfer belt 113 outer ring surfaces by apply a direct current transfer bias to photosensitive drums 111.The mode cloth that second transfer roll 116 is parallel to photosensitive drums 111 with its axis is listed near one of two backing rolls 122.When annular transfer belt 113 entrained carbon dust image lines proceed to backing roll 122 positions, second transfer roll 116 provides a direct current transfer bias, the entrained carbon dust image transfer of annular transfer belt 113 between second transfer roll 116 and annular transfer belt 113 are corresponding to the position of backing roll 122 with the paper 123 that equals annular transfer belt 113 rotational line speed operation on.Paper 123 is when the working line of laser printer inside marches to fixation unit 117, pass two

fixing rollers

1171,1172 of fixation unit 117, apply predetermined pressure and temperature by 1171,1172 pairs of paper 123 of two fixing rollers, the carbon dust image is for good and all solidified in self surface.

Aforementioned photosensitive drums 111 is after the bias effect that first transfer roll 115 is applied, its most carbon dusts that are arranged in the carbon dust image on the periphery have been transferred on the annular transfer belt 113, 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 111 second rounds of photosensitive drums and sharpness of formed electrostatic latent image etc.Thus, on photosensitive drums 111 operative orientation α, the useless powder recovery bin 118 that axially stretches and keep in touch with photosensitive drums 111 faces of cylinder along photosensitive drums 111 is set in the downstream direction of first transfer roll 115.By the residual carbon dust on scraper removing photosensitive drums 111 faces of cylinder that are provided with on the useless powder recovery bin 118, and be stored in the useless powder recovery bin 118.Through the photosensitive drums 111 after the cleaning, by keeping in touch with photosensitive drums 111 or the charging roller 120 of adjacency state charges to its external cylindrical surface to it and reaches same electromotive force.Laser printer is finished a workflow like this, enters for second work period.

Introduce the structure of the utility model cartridge A below.See Fig. 3,4,, and in conjunction with Fig. 2 a, 2b the utility model cartridge A with cylindrical drum 101 as main structure body.An axial end of cylindrical drum 101 opens wide, and is sealed by hot melt or bonding way by the corresponding end cap (not shown) that adopts the same material preparation under the formed uncovered state that carbon dust arranged in filling, and the other end is by transverse end wall 102 sealings.Space between end cap and the transverse end wall 102 becomes and is used to take in or store for example storeroom 103 of carbon dust of developer.At transverse end wall 102 and the position that cylindrical drum 101 axis overlap, be provided with circular hole 104.Shaft 106 1 ends that carry stirring piece 105 on it pass circular hole 104 backs with transmission gear 107 secure bond, and one section that stirring piece 105 is installed is suspended in the storeroom 103.Stirring piece 105 is fixed on the shaft 106 along cylindrical drum 101 end radially, keeps the sliding contact state between the cylindrical part of its opposite end and storeroom 103 inside surfaces.Under the effect of the driving moment that transmission gear 107 is transmitted, shaft 106 drives the axis rotation of stirring piece 105 around cylindrical drum 101.Be provided with meal outlet 108 at transverse end wall 102 near the position on cylindrical drum 101 all edges.Present embodiment cartridge A is configured in the laser printer with the attitude that its axis is parallel to photosensitive drums 111 axis place surface levels, so, spirality powder delivery roller (not shown) is set in meal outlet 108, just can will be passed near the meal outlet 108 away from the carbon dust of meal outlet 108 1 ends.The main part of spirality powder delivery roller stretches in the storeroom 103, and adopts to rotatablely move and be sent to the carbon dusts in the storeroom 103 near the meal outlet 108 or by meal outlet 108 storeroom 103 interior carbon dusts brought to storeroom 103 outsides.In order to cooperate the flow characteristics of carbon dust, cartridge A is provided with two zones 109,110 that concave along cylindrical drum 101 footpaths corresponding to the cylindrical wall of meal outlet 108.The position in its first recessed district 109 is positioned at the adjacency section of meal outlet 108 and transverse end wall 102, near the position in the second recessed district 110 is adjoined the first recessed district 109 and axially extended to aforementioned uncovered or end cap back to meal outlet 108 along cylindrical drum 101.The first recessed district 109 is many greatly to the degree that storeroom 103 footpaths concave than the second recessed district 110.Two recessed districts 109,110 are rendered as circular arc on the axial cross section of cylindrical drum 101, they cooperate the airtight powder flow passage of formation with the developing apparatus 112 (shown in figure) of printer, carbon dust is flowed in developing apparatus 112 from meal outlet 108 outflows and along this flow channel use in order to developing roller 1121.

Near the first recessed district 109 meal outlet 108 protrudes between the cylindrical surface of part with storeroom 103 in the storeroom 103, adopts curved surface 124 transition of smoothly releiving to connect.Specifically, on the axial cross section of cylindrical drum 101, protrude in the part in the storeroom 103 and the cylindrical surface of storeroom 103 near the first recessed districts 109 the meal outlet 108, connection is between the two adopted and is protruded in the interior part of storeroom 103 with the first recessed district 109 and the cylindrical surface of storeroom 103 all keeps the curved surface 124 of tangent relation to be connected.Like this, what just can contact storeroom 103 when stirring piece 105 rotates almost all is parallel to the axial inside surface of cylindrical drum 101, helps eliminating the dead angle area that prior art exists, and the residual quantity of minimizing carbon dust improves its utilization ratio.

Claims

1. carbon powder cartridge for laser printer, comprise powder-storage bin, puddle support, described powder-storage bin is the cylindrical drum of its axial end by the transverse end wall sealing, described transverse end wall is provided with axis hole and meal outlet, described puddle support comprises rotating shaft and blade, described rotating shaft one end passes described axis hole and fixedlys connected with transmission gear, described blade one end is fixed in the described rotating shaft, keep the sliding contact state between described blade opposite end and the described powder-storage bin, it is characterized in that protruding in surface in the described powder-storage bin with on described powder-storage bin axial cross section, having level and smooth fillet surface between the cylindrical surface of described powder-storage bin with described meal outlet corresponding concave part.

2. according to the described carbon powder cartridge for laser printer of claim 1, it is characterized in that described fillet surface protrudes in described recess between the cylindrical surface of surface in the described powder-storage bin and described powder-storage bin and on described powder-storage bin axial cross section, keep tangent connection status respectively.