CN201163335Y - Separation device for electronic photography imaging processing box - Google Patents

Abstract

The utility model relates to a separating unit for an electro-photographic image processing case, comprising a first fastening plate, a second fastening plate and a connecting block, wherein the first fastening plate and the second fastening plate extend respectively along the same direction vertical to the long edge of the connecting block from the two ends of the block. The length of the connecting block is corresponding to that of a gap reserved between a photosensitive drum and a developer roller, which are arranged in the electro-photographic image processing case. The separating unit can separate the photosensitive drum and the developer roller on the electro-photographic image processing case, which contributes to the protection of the photosensitive drum of the electro-photographic image processing case during transportation.

Description

The electrophotography image-forming processing box tripping device

Technical field

The utility model relates to the matching used tripping device of a kind of electrophotography image-forming processing box, particularly to including electronic photographic sensitive drum and the handle box that is formed at the developer roll that the lip-deep electrostatic latent image of electronic photographic sensitive drum developed being separated, so that between the interface of electronic photographic sensitive drum and developer roll, form the tripping device of released state.

Background technology

Electrophotographic imaging forming apparatus is that a kind of electrophotographic image forming method of can utilizing for example forms the device of image on the recording paper surface at recording medium, and it comprises: electrophotographic copier, laser printer etc.In its matching used handle box is a kind of removable multi-functional integrated box that but is installed in the laser printer, at least all be provided with at least one developer roll that electronic photographic sensitive roused and be used as developing parts in it, perhaps concentrate to be equipped with electronic photographic sensitive drum, developer roll, charging roller and/or cleaning doctor.

Laser printer utilizes the developer of carbon dust and so on to form gr image.Carbon dust leaves in the powder storehouse of electrophotography image-forming processing box, and it sends photosensitive drums to via developer roll.In contact-type electronic photographing imaging handle box, developer roll adjoins mutually with photosensitive drums, the state that both cylindrical outer surfaces remain in contact with one another with the parallel form of its axis.Be applied to the developer roll of this handle box, its transversal section comprises a conductive center core layer and one or more resistive layer that is stratified and set on the center core layer periphery.The resistance of resistive layer is greater than center core layer.Outermost resistive layer be in usually can with the contacted position of photosensitive drums on.Outermost resistive layer usually adopt a kind of resilient material that is distributed with conductive particle for example rubber prepare, can prevent developer roll like this because contact friction former thereby damage photosensitive drums.On the other hand, in the course of the work, stable contact condition must be kept between the cylindrical outer surface of developer roll and photosensitive drums, stable development effect could be obtained, be necessary so that by pressure-producing part for example the elastic force of spring generation is pressed on developer roll on the photosensitive drums sustainedly and stably.So, in the transportation and storage process of electrophotography image-forming processing box, promptly finish and electrophotography image-forming processing box is installed in time period in the laser printer in electrophotography image-forming processing box assembling, the contacted part of developer roll and photosensitive drums will be in hard pressed state over a long time under certain temperature, humidity, deformation such as cause the most external resistive layer of developer roll to form subsiding.The developer roll that has this deformation is when forming image, will certainly form its deformation surface and normal surface alternately contacting with rotating manner with photosensitive drum surface, cause forming inconsistent contact condition at contact area between developer roll and the photosensitive drums, influence development effect, even cause printer normally not print.

The utility model content

It is a kind of with the matching used tripping device of electrophotography image-forming processing box that the utility model purpose is to provide, and this tripping device can make in the transportation of electrophotography image-forming processing box and storage process between the cylindrical outer surface of its electronic photographic sensitive drum and developer roll and be in non-touching released state.

The utility model electrophotography image-forming processing box tripping device according to the above-mentioned purpose design comprises the first snapping plate, second snapping plate and the contiguous block.The first snapping plate is extended perpendicular to the same direction that is connected the block length limit by the edge, two ends of contiguous block respectively with the second snapping plate.Length when the length of contiguous block produces the gap corresponding to the photosensitive drums in the electrophotography image-forming processing box and developer roll.

Preferably, aforementioned electronic photographing imaging handle box tripping device, the shape of its first snapping plate and the second snapping plate respectively with the developing room of electrophotography image-forming processing box and imaging chamber along photosensitive drum shaft to stage casing outer wall surface correspondence.

Electrophotography image-forming processing box tripping device of the present utility model, utilize the simple first snapping plate and the second snapping plate that the developing room of electrophotography image-forming processing box and imaging chamber are connected in therebetween, make electrophotography image-forming processing box its developing room and imaging chamber under non-working condition be in form separately corresponding to the side at photosensitive drums and developer roll place, and then obtain the state that photosensitive drums and developer roll are separated from each other, help during the accumulating of electrophotography image-forming processing box, keeping its developer roll to be used for carrying, the roll surface of accumulating carbon dust is in intact cylindrical state.

The drawing explanation

The known electrophotography image-forming processing box skeleton view one of Fig. 1.

The known electrophotography image-forming processing box skeleton view two of Fig. 2.

The known electrophotography image-forming processing box side view of Fig. 3.

The known electrophotography image-forming processing box skeleton view of Fig. 4 is equipped with the utility model tripping device on it.

The known electrophotography image-forming processing box side view of Fig. 5 is equipped with the utility model tripping device on it.

Fig. 6 a the utility model tripping device skeleton view one.

Fig. 6 b the utility model tripping device skeleton view two.

Embodiment

With reference to Fig. 1～3, be a kind of existing printing office electrophotography image-forming processing box A.

On the handle box A end walls 103,104 axial, respectively be provided with a handle 102 and a guide 105 corresponding to photosensitive drums 101.Wherein, end walls 103,104 connections that the connecting portion of two handles 102 exists together respectively and manages box A, and along the direction extension that is parallel to end walls 103,104.Two guides 105 are positioned at handle box A with the relative side of photosensitive drums 101, and their extend one section predetermined length along the direction that is parallel to photosensitive drums 101 axis towards handle box A outside.The length in the same way that this predetermined length adds handle box A is parallel to photosensitive drums 101 axially extended length correspondences with the edge that laser printer is used for admission processing box A.When using handle box A, attach it to the installation site of laser printer in the following manner.The user at first catches handle 102 with hand so that hold handle box A, so just makes photosensitive drums 101 be positioned the front of handle box A along the direction of the insertion laser printer of handle box A.Thereafter, by supporting, slip and rotation in the corresponding guide rail of guide 105 on being arranged at the laser printer sidewall of handle box A, A is inserted in laser printer handle box.

If the photosensitive drums 101 among the handle box A is exposed under the irradiation of light for a long time, its light sensitive characteristic will descend gradually.And, when handle box A being installed to laser printer inside, in the exposed usually externally environment in the photosensitive position of the part of photosensitive drums 101, therefore very easily be subjected to frictionally damage, perhaps on its face of cylinder, adhere to pollutant.For the requirement that prevents that above-mentioned damage or pollution condition from taking place,, be provided with rotating photosensitive drums plate washer 106, so that expose or cover the exposed photosensitive position of photosensitive drums 101 when needed in the interval of handle box A corresponding to photosensitive drums 101 exposed photosensitive positions.When being installed to handle box A in the laser printer, photosensitive drums plate washer 106 is opened, thereby exposes the exposed photosensitive position of photosensitive drums 101.When handle box A was withdrawn laser printer, photosensitive drums plate washer 106 was maintained on the off-position.

Handle box A comprises developing room 108 and the imaging chamber 109 that the connecting pin 107 by a pair of coaxial arrangement links together.Both can rotate developing room 108 and imaging chamber 109 around connecting pin 107.Developing room 108 is made of powder storehouse 110 and carriage 111.Developer roll 112 just is arranged in the meal outlet 113 in powder storehouse 110, and can rotate in meal outlet 113.In imaging chamber 109, be used to accept position, be provided with photosensitive drums 101 by laser printer emitted laser bundle.Two axle heads of photosensitive drums 101 can be rotated to support on respectively on the end walls 103,104 of handle box A, and its axis is parallel to the axis of developer roll 112.

On one of the end walls of developing room 108 and imaging chamber 109 104 outside surfaces, with connecting pin 107 is center of rotation, at position, be provided with first coil spring 114 of its two ends fixedly connected developing room 108 of difference and imaging chamber 109 near photosensitive drums 101 and developer roll 112.Under the state that handle box A assembling finishes, first coil spring 114 is in extended state all the time, thereby applies to developing room 108 and imaging chamber 109 all the time that to make them be the acting force that center of rotation is moved towards the direction that is in contact with one another with connecting pin 107.Similarly, with the relative side of photosensitive drums 101, between developing room 108 and imaging chamber 109, be provided with second coil spring 115 at handle box A.Equally, under the state that handle box A assembling finishes, second coil spring 115 is in compressive state all the time, thereby applies to developing room 108 and imaging chamber 109 all the time that to make them be that center of rotation is towards being in contact with one another the acting force that direction is moved with connecting pin 107.Both can be under the design point that connecting pin 107 rotates in developing room 108 and imaging chamber 109, effect when developing room 108 and imaging chamber 109 are subjected to first coil spring 114 and second coil spring 115 makes and keeps in touch state between the face of cylinder of photosensitive drums 101 and developer roll 112.This contact condition is the necessary link that laser printer is finished image output, but can damage the developer carrying face of developer roll 112 during accumulating inevitably.The measure of avoiding this problem to take place can be adopted the following tripping device that the utility model proposes.

Referring to Fig. 6 a, b, be the tripping device B that is used for the aforementioned laser printer.

This tripping device B adopts materials such as plastics or the metal material preparation that has than hard intensity, and structurally it is made up of the first snapping plate 201, the second snapping plate 202 and contiguous block 203.Contiguous block 203 elongated flat plate shape.The first snapping plate 201 and the second snapping plate 202 respectively by two ends of contiguous block 203 along extending perpendicular to the same direction on contiguous block 203 long limits, its development length is with can be center of rotation back to a side of developer roll 112 and photosensitive drums 101 be connected between the first snapping plate 201 and the second snapping plate 202 simultaneously is advisable with connecting pin 107 with developing room 108 and imaging chamber 109.And under this state, the length of contiguous block 203 just can be oppressed first coil spring 114 and second coil spring 115 simultaneously, and then drives photosensitive drums 101 and developer roll 112 generation Separation G (referring to Fig. 5).The first snapping plate 201 and the second snapping plate 202 have the shape corresponding to developing room 108 and imaging chamber's 109 outer walls, so as when developing room 108 and imaging chamber 109 to be snapped between the first snapping plate 201 and the second snapping plate 202 simultaneously to developing room 108 and imaging chamber 109 apply perpendicular to connecting pin 107 axis and make developing room 108 and imaging chamber 109 mutually near and make the acting force that photosensitive drums 101 and developer roll 112 are separated from each other.

Referring to Fig. 4,5, handle box A is snapped between the first snapping plate 201 and the second snapping plate 202 of tripping device B back to a side of developer roll 112, and make tripping device B be fixed in handle box A along the axial stage casing of photosensitive drums 101.At this moment, developing room 108 and imaging chamber 109 are snapped between the first snapping plate 201 and the second snapping plate 202 simultaneously, between photosensitive drums 101 and the developer roll 112 because developing room 108 and imaging chamber 109 move and produce Separation G along separated direction corresponding to the side at photosensitive drums 101 and position, developer roll 112 place.This mutual released state between photosensitive drums 101 and the developer roll 112 helps during the accumulating of handle box A keeping that developer roll 112 is used to carry, the roll surface of accumulating carbon dust is in intact cylindrical state.And when using handle box A, as long as go up tripping device B removal from handle box A, developing room 108 and imaging chamber 109 are corresponding to a side at photosensitive drums 101 and position, developer roll 112 place, under the promotion of first coil spring 114 and second coil spring 115, will move along mutual approaching direction, photosensitive drums 101 and developer roll 112 are resumed contacts, enter the duty of awaiting orders shown in Figure 3.

Claims (2)

1. electrophotography image-forming processing box tripping device, it is characterized in that it comprises the first snapping plate (201), the second snapping plate (202) and contiguous block (203), described first snapping plate (201) and the described second snapping plate (202) respectively by two ends of described contiguous block (203) along extending perpendicular to the same direction on the long limit of described contiguous block (203), the length of the length of described contiguous block (203) during corresponding to photosensitive drums in the described electrophotography image-forming processing box (101) and developer roll (112) generation gap.

2. electrophotography image-forming processing box tripping device according to claim 1, the shape that it is characterized in that described first snapping plate (201) and the described second snapping plate (202) respectively with the developing room (108) of described electrophotography image-forming processing box and imaging chamber (109) along the axial stage casing outer wall surface correspondence of described photosensitive drums (101).

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