CN2852204Y

CN2852204Y - Carbon powder box used for laser printer

Info

Publication number: CN2852204Y
Application number: CN 200520131976
Authority: CN
Inventors: 金本友
Original assignee: Print Rite Technology Development Co Ltd of Zhuhai
Current assignee: Print Rite Technology Development Co Ltd of Zhuhai
Priority date: 2005-10-29
Filing date: 2005-10-29
Publication date: 2006-12-27
Anticipated expiration: 2015-10-29

Abstract

The utility model relates to a carbon powder box used for a laser printer, which comprises a developing unit which is at least composed of a developing roller, a powder conveying roller and a carbon powder chamber, wherein a sealing strip for preventing carbon powder from leaking from a transfer printing position is arranged among the developing roller, the powder conveying roller and the frame of the carbon powder box; the sealing strip forms a V shape in the cross-section which is perpendicular to the axial direction of the developing roller, one end of the sealing strip is fastened to the frame of the carbon powder box in the transfer printing position, and the other end of the sealing strip is fastened or cleaved to the frame of the carbon powder box which is arranged in the carbon powder chamber and corresponds to the surface of the powder conveying roller; elastic contact relationship between the vertex of the V shape of the sealing strip and the outer surface of the developing roller is kept. The utility model has the advantages that a blind zone between the powder conveying roller and a sealing element on the transfer printing position can be eliminated, and the accumulation of the carbon powder in the carbon powder box can be reduced effectively.

Description

Carbon powder cartridge for laser printer

Technical field

The utility model relates to carbon powder cartridge for laser printer, the Delevoping cartridge that can separate with the fixation unit at the transfer printing unit at laser scan unit, transfer roll place and fixing roller place particularly, the electrostatic latent image that is used for that photosensitive drums is produced forms the visual image by developers such as carbon dust record.

Background technology

Common Equipment for forming image comprises duplicating machine, laser printer, facsimile recorder, colour band printer and LED printer etc.

In the Equipment for forming image of laser scanning or laser photo-typesetting form, carbon dust is the final image forming medium of realization figure---light------figure conversion.Usually, the developer roll of drum, powder integral type imaging device just is arranged at around the photosensitive drums, is formed on the photosensitive drums in order to the carbon dust image.The carbon dust of developer roll is from toner.The Chu Fenliang of toner is subjected to the warehouse capacity limitation, therefore, must be provided by the Delevoping cartridge or the cartridge of special use after the carbon dust in the powder storehouse is used up.

The major function piece that laser image forms device comprises: laser scan unit, photoelectric conversion unit, charhing unit, developing cell, transfer printing unit and fixation unit.The main member of laser scan unit is laser generator and light reflection and transmission system.The main member of photoelectric conversion unit is a photosensitive drums.Charhing unit mainly comprises the charging roller of positive charge grid-control formula corona charging roller or other form.Developing cell is made of the storage powder chamber, developing room and the developer roll that are used to store carbon dust.Transfer printing unit mainly comprises transfer roll.Fixation unit is made of warm-up mill and backer roll.Common cartridge or handle box generally include photoelectric conversion unit, charhing unit, developing cell.Also have photoelectric conversion unit, charhing unit directly are arranged on the laser image formation device main frame, cartridge then only comprises developing cell, forms the laser image that the device main frame forms assembly assembling by cartridge that only comprises developing cell and laser image and forms device.

Under cartridge was packed the user mode of laser printer into, photosensitive drum surface was charged equably by charging roller.Laser scanner is launched the laser through ovennodulation that contains image information to photosensitive drums, forms and the electrostatic latent image for the treatment of that duplicating image is corresponding at photosensitive drum surface.Afterwards, from the carbon dust of developer roll then be adsorbed on and make electrostatic latent image convert visual image on the photosensitive drum surface.Along with the rotation of photosensitive drums, replace to transfer roll at the visual image that photosensitive drum surface forms by carbon dust.Through the effect of transfer roll transfer voltage, visual image is transferred on the recording medium such as paper, with after after warm-up mill and backer roll carry out heating and pressurizing to the visual image on the recording medium, the visual image full solidification that carbon dust is formed is on recording medium.Finish a basic imaging operation like this.

In above-mentioned print procedure, convert the electrostatic latent image on the photosensitive drums to visual image, must depend on the adsorbed carbon dust of developer roll.These carbon dusts are stored in the toner, and by the transport supply of powder feeding roller realization to developer roll.As shown in Figure 1, 2, 3, during work, cartridge 1 is by the driving of corresponding external power supply, and powder feeding roller 6 is transported to the carbon dust in the toner 10 by arrow directions X shown in Figure 2 the zone of being pollinated of developer roll 4.Developer roll 4 is adsorbed in its region surface of being pollinated by the Electrostatic Absorption effect with carbon dust, simultaneously according to arrow Y direction rotation shown in Figure 2, and then by the adjustment of carbon dust layer thickness adjustment sheet 8 the carbon dust layer thickness is limited in suitable scope.Afterwards, developer roll 4 continues to rotate along the Y direction, to be converted to the bulging face that photosensitive drums 3 process Laser Modulation have electrostatic latent image through the carbon dust layer of thickness adjusted, will turn round to transfer position by the visual image that carbon dust develops according to arrow Z direction rotation shown in Figure 2 by photosensitive drums 3.By exchange visual image is transformed into subsequently on the recording mediums such as paper with the transfer printing unit (not shown).

Developer roll 4 is passed to photosensitive drums 3 with carbon dust, continues subsequently along according to arrow Y direction rotation shown in Figure 2, and the transfer position that is in naked state 7 through facing jointly with photosensitive drums 3 surfaces returns back in the developing chamber 10 afterwards, enters the next work period.Under this mated condition, reveal in order to prevent the carbon dust in the developing chamber 10, must between developer roll 4 and transfer position 7, diaphragm seal 9 be set, the gap that exists between sealing developer roll 4 and the transfer position 7.Diaphragm seal 9 one ends are fixed on the cartridge framework 2 at transfer position 7 places, keep the Elastic Contact relation between the other end and developer roll 4 faces of cylinder.At both contact positions, diaphragm seal plane, 9 place and developer roll 4 surperficial tangent lines keep a sharp angle.Like this, diaphragm seal 9 allows developer roll 4 carrying through exchanging the residual carbon dust in back with photosensitive drums 3 and enters developing chamber 10.In developing chamber 10, powder feeding roller 6 is transported to carbon dust after the developer roll 4, continues to proceed to the zone at diaphragm seal 9 places along arrow directions X rotation shown in Figure 2.Because diaphragm seal 9 is fixed in the front region of powder feeding roller 6 sense of rotation, and then cause the carbon dust of powder feeding roller 6 remained on surface owing to vibration, swipe and fall and accumulate the blind area 5 that forms between powder feeding roller 6 respective surfaces, diaphragm seal 9 and cartridge framework 2 threes.Under the single direction rotation status of powder feeding roller 6, the outside surface of powder feeding roller 6 will produce impact, oscillation action to the carbon dust in the blind area 5, finally form the dense packing of carbon dust in the blind area 5.In case forming this carbon dust piles up, normal rotation for powder feeding roller 6 might produce adverse influence, for example 5 pairs of powder feeding roller 6 outside surfaces in blind area that tamped by carbon dust produce bigger frictional resistance, and on the other hand, the carbon dust in the blind area 5 also is difficult to be utilized effectively.

The utility model content

The utility model purpose provides the carbon powder cartridge for laser printer that carbon dust is piled up in the blind area that can eliminate between powder feeding roller and the transfer position place seal.

According to above-mentioned purpose, carbon powder cartridge for laser printer of the present utility model comprises the developing cell that is made of developer roll 4, powder feeding roller 6 and toner 10 at least.Keep between the processing unit at this developing cell and photosensitive drums 3 places flexibly connecting or fixedlying connected.Be provided with the diaphragm seal 9` that prevents that carbon dust from revealing from transfer position 7 between developer roll 4, powder feeding roller 6 and cartridge framework 2 threes.Diaphragm seal 9` is " V " font on the cross section axial perpendicular to developer roll 4.The end of diaphragm seal 9` is fixed on the cartridge framework 2 at transfer position 7 places, the other end be fixed in or be close in the toner 10 with powder feeding roller 6 surperficial corresponding cartridge frameworks 2 on.Keep the Elastic Contact relation between " V " font summit 90` of diaphragm seal 9` and the outside surface of developer roll 4.

Preferably, the part between " V " font summit of the other end that is positioned at toner 10 of above-mentioned diaphragm seal 9` and diaphragm seal 9` is the cambered surface that has the same center of circle with the outside surface of powder feeding roller 6.The outside surface of this cambered surface and powder feeding roller 6 maintains a gap between the two.

Behind the cartridge that uses the utility model to provide on the laser printer, owing to only have less clearance between improved diaphragm seal and the powder feeding roller, thereby the carbon dust in this gap can be brought in the toner effectively with the rotation of powder feeding roller and is used, therefore, between developer roll, powder feeding roller and cartridge framework three, can not form the blind area that causes carbon dust to be piled up, and then the carbon dust that has overcome effectively in this blind area is piled up problem.

The drawing explanation

Fig. 1 has carbon powder cartridge for laser printer face shaping synoptic diagram now.

Fig. 2 is the A-A cut-open view of Fig. 1.

Fig. 3 is the partial enlarged drawing of Fig. 2.

Fig. 4 the utility model carbon powder cartridge for laser printer A-A cut-open view, it analyses and observe the position corresponding to Fig. 2.

The diaphragm seal structural representation that Fig. 5 the utility model carbon powder cartridge for laser printer uses.

Fig. 6 is the partial enlarged drawing of Fig. 4.

Embodiment

Fig. 1,4,5,6 illustrates the structural diagrams under the utility model different conditions respectively, and wherein the same configuration relation is used identical mark.In order to save the instructions length and to reach succinct purpose, the utility model has omitted diagram and the explanatory note of cartridge with relevant processing unit annexation, then emphasis is described in the cartridge about being used to adjust the diaphragm seal 9` of sealing between powder feeding roller 6 respective surfaces, transfer position 7 and cartridge framework 2 threes.Relevant processing unit is the detailed description of photosensitive drums, laser system, transfer roll etc. for example, and the reader can consult for example 00106749 Chinese invention patent instructions of prior art.

Referring to Fig. 1,4,5,6, carbon powder cartridge for laser printer of the present utility model, its developing cell are made of developer roll 4, powder feeding roller 6 and toner 10 at least.Keep between the processing unit at this developing cell and photosensitive drums 3 places flexibly connecting or fixedlying connected.Be provided with the diaphragm seal 9` that prevents that carbon dust from revealing from transfer position 7 between developer roll 4, powder feeding roller 6 and cartridge framework 2 threes.Diaphragm seal 9` is " V " font on the cross section axial perpendicular to developer roll 4.The end of diaphragm seal 9` is fixed on the cartridge framework 2 at transfer position 7 places, the other end be fixed in or be close in the toner 10 with powder feeding roller 6 surperficial corresponding cartridge frameworks 2 on.Keep the Elastic Contact relation between " V " font summit 90` of diaphragm seal 9` and the outside surface of developer roll 4.Above-mentioned diaphragm seal 9` is positioned at the part between " V " font summit 90` of the other end of toner 10 and diaphragm seal 9`, is the cambered surface that has the same center of circle with the outside surface of powder feeding roller 6.The outside surface of this cambered surface and powder feeding roller 6 maintains a gap between the two.

During work, cartridge 1 is by the driving of corresponding external power supply, and powder feeding roller 6 is transported to the carbon dust in the toner 10 by arrow directions X shown in Figure 4 the zone of being pollinated of developer roll 4.Developer roll 4 is adsorbed in its region surface of being pollinated by the Electrostatic Absorption effect with carbon dust, simultaneously according to arrow Y direction rotation shown in Figure 4, and then by the adjustment of carbon dust layer thickness adjustment sheet 8 the carbon dust layer thickness is limited in suitable scope.Afterwards, developer roll 4 continues to rotate along the Y direction, to be converted to the bulging face that photosensitive drums 3 process Laser Modulation have electrostatic latent image through the carbon dust layer of thickness adjusted, rotate according to arrow Z direction shown in Figure 4, will turn round to transfer position 7 by the visual image that carbon dust develops by photosensitive drums 3.By exchange visual image is transformed into subsequently on the recording mediums such as paper with the transfer printing unit (not shown).

Developer roll 4 is passed to photosensitive drums 3 with carbon dust, continues subsequently along according to arrow Y direction rotation shown in Figure 4, and the transfer position that is in naked state 7 through facing jointly with photosensitive drums 3 surfaces returns back in the developing chamber 10 afterwards, enters the next work period.The diaphragm seal 9` that between developer roll 4 and transfer position 7, is provided with, because the outside surface of itself and powder feeding roller 6 belongs to concentric circles, only there is less clearance between the two, the end on two inclined-planes of diaphragm seal 9` formation " V " font and cartridge framework 2 constitute the cavity 5` that does not allow carbon dust to enter simultaneously, thereby the carbon dust in this gap can be brought in the toner effectively with the rotation of powder feeding roller and is used.So, being present in blind area 5 between powder feeding roller 6 respective surfaces, diaphragm seal 9 and cartridge framework 2 threes and interior carbon dust thereof in the prior art piles up (as shown in Figure 2) and is overcome.

Claims

1. carbon powder cartridge for laser printer, comprise at least by developer roll (4), the developing cell that powder feeding roller (6) and toner (10) constitute, keep between the processing unit at described developing cell and photosensitive drums (3) place flexibly connecting or fixedlying connected, described developer roll (4), be provided with the diaphragm seal (9`) that prevents that carbon dust from revealing from transfer position (7) between described powder feeding roller (6) and cartridge framework (2) three, it is characterized in that described diaphragm seal (9`) is " V " font on the cross section axial perpendicular to described developer roll (4), one end of described diaphragm seal (9`) is fixed on the cartridge framework (2) at transfer position (7) place, the other end be fixed in or be close in the toner (10) with the surperficial corresponding cartridge framework of described powder feeding roller (6) (2) on, keep Elastic Contact to concern between " V " font summit (90`) of described diaphragm seal (9`) and the outside surface of described developer roll (4).

2. carbon powder cartridge for laser printer according to claim 1, it is characterized in that part between " V " font summit of the described other end of described diaphragm seal (9`) and described diaphragm seal (9`) is that outside surface with described powder feeding roller (6) has the cambered surface in the same center of circle, the outside surface of described cambered surface and described powder feeding roller (6) maintains a gap between the two.