CN201681255U

CN201681255U - Developing device and image forming device

Info

Publication number: CN201681255U
Application number: CN2009202730126U
Authority: CN
Inventors: 岸勋朗
Original assignee: Brother Industries Ltd
Current assignee: Brother Industries Ltd
Priority date: 2008-11-28
Filing date: 2009-11-27
Publication date: 2010-12-22
Anticipated expiration: 2019-11-27
Also published as: JP2010128339A

Abstract

A developing device and an image forming device can prevent developer from leaking out of a frame from the peripheral faces of two ends in the long edge direction of a developer carrier. In a developing box (6), side sealing strips (45) for preventing toner from leaking out from the peripheral faces of two ends in the width direction of a developing roller (5) are arranged on two sides of an opening portion (23) in the width direction. In a developing outer casing (20) of the developing box (6), toner grooves (53) for stopping the toner leaked from the peripheral faces of the two ends in the width direction of the developing roller (5) are arranged on the upper side portion (32E) on the upper side positioned in the rotating direction X relative to the side sealing strips (45). The toner grooves (53) and the upper side portion (32E) of the developing outer casing (20) are integrally arranged so that no gap communicated with outside of the developing outer casing (20) is arranged among the toner grooves (53) and the developing outer casing (20).

Description

Developing apparatus and image processing system

Technical field

The utility model relates to image processing systems such as a kind of laser printer and is installed in developing apparatus on this image processing system.

Background technology

As image processing system, known have a laser beam printer (for example with reference to patent documentation 1) that comprises the developing apparatus that the electrostatic latent image on the photosensitive drums is developed.

In the laser beam printer that patent documentation 1 is put down in writing, developing apparatus has toner container of accommodating toner and the developer container of accommodating developer roll.The development bearing of developer roll by being installed on the developer container two ends on its long side direction is supported on the developer container with rotating freely.The toner of toner container is carried on the outer peripheral face of developer roll, is attached to afterwards on the electrostatic latent image on the photosensitive drums, carries out the development of electrostatic latent image.

In developer container, be provided with the capturing means that is used to catch the toner that spills from the outer peripheral face at developer roll long side direction both ends near the long side direction two ends of developer roll.And in developer container, the two sides of developer roll long side direction are provided with toner and spill protection walls.The outside end face of capturing means spills protection walls with pairing toner and contacts, and the path that spills of toner is cut off thus, thereby prevents from largely to obtain toner that parts reclaim and spill between the protection walls from capturing means and toner and spill.

Patent documentation 1: TOHKEMY 2003-228234 communique

In the developing apparatus that patent documentation 1 is put down in writing, toner spills protection walls and is wholely set with being installed in the development bearing on the developer container or the guard shield of development bearing, in other words, with developer container be two parts.

Therefore, toner spills and always has the gap between protection walls and the developer container, even so contact and cut off toner and spill the path by making capturing means and toner spill protection walls, toner also can escape to the outside of developer container from the gap that toner spills protection walls and developer container.When the toner that spills from this gap is attached on the recording medium, bring influence can for the quality that is formed on the image on the recording medium.

The utility model content

The image processing system that the purpose of this utility model is to provide a kind of developing apparatus and has this developing apparatus can prevent to escape to outside the framework from the developer that the outer peripheral face at the long side direction both ends of developer carrier spills.

In order to achieve the above object, the developing apparatus that technical scheme 1 is put down in writing is characterized in that, comprising: framework, be formed with peristome, and accommodate developer; Developer carrier can be supported on the described framework, at the outer peripheral face bearing developer rotatably at described peristome; Seal member, in described framework, be arranged on the both sides of the described peristome on the long side direction of described developer carrier, contact, prevent that developer from spilling from the outer peripheral face at the long side direction both ends of described developer carrier with the outer peripheral face at the long side direction both ends of described developer carrier; And interception portion, in described framework, be wholely set in the upstream side part that is positioned at the sense of rotation upstream side of described developer carrier with respect to described seal member, the developer relative with the outer peripheral face at the long side direction both ends of described developer carrier, that interception spills from the outer peripheral face at the long side direction both ends of described developer carrier.

And, the utility model that technical scheme 2 is put down in writing is characterized in that, in the utility model that technical scheme 1 is put down in writing, described interception portion compares with peripheral part of interception portion described in the described upstream side part, the direction depression of separating towards the outer peripheral face from described developer carrier.

And the utility model that technical scheme 3 is put down in writing is characterized in that, in technical scheme 1 or 2 utility models of being put down in writing, the described sense of rotation upstream-side-end in described interception portion is provided with towards the side-prominent wall portion of the outer peripheral face of described developer carrier.

And, the utility model that technical scheme 4 is put down in writing, it is characterized in that, in the utility model that technical scheme 3 is put down in writing, comprise thin film component, this thin film component is arranged on the end face of described sense of rotation upstream side of described wall portion, compares towards the outer peripheral face of described developer carrier side-prominent with described wall portion.

And, the utility model that technical scheme 5 is put down in writing, it is characterized in that, in the utility model that technical scheme 4 is put down in writing, described thin film component is erected between the end face of described sense of rotation upstream side of described wall portion of another distolateral described interception portion of the end face of described sense of rotation upstream side of described wall portion of the distolateral described interception portion of described long side direction one and described long side direction.

And, the utility model that technical scheme 6 is put down in writing, it is characterized in that in technical scheme 4 or 5 utility models of being put down in writing, the end face of the described sense of rotation upstream side of the marginal portion of peristome is on a face described in the end face of the described sense of rotation upstream side of described wall portion and the described framework.

And, the utility model that technical scheme 7 is put down in writing, it is characterized in that, in technical scheme 1 to 6 in each described utility model, comprise partition wall, this partition wall with described framework internal separation for first Room that disposes described developer carrier with accommodate second Room that the developer that provides to described developer carrier is provided

Described framework can be divided into first framework that is provided with described partition wall and be provided with second framework of described interception portion.

And the image processing system that technical scheme 8 is put down in writing is characterized in that, comprises each described developing apparatus in the technical scheme 1 to 7.

According to technical scheme 1 and 8 utility models of being put down in writing, in this developing apparatus, developer carrier rotatably is supported on the framework at peristome.Be housed in developer carrying in the framework at the outer peripheral face of developer carrier.

And, in framework, the sidepiece strip of paper used for sealing that is arranged at the peristome both sides on the long direction (being designated hereinafter simply as " long side direction ") of developer carrier contacts with the outer peripheral face at the long side direction both ends of developer carrier, prevents that developer from spilling from the outer peripheral face at the long side direction both ends of developer carrier.

And, in framework, for the sidepiece strip of paper used for sealing, be positioned on the upstream side part of upstream side of sense of rotation (being designated hereinafter simply as " sense of rotation ") of developer carrier, be provided with interception portion.Interception portion is relative with the outer peripheral face at the long side direction both ends of developer carrier, the developer that interception spills from the outer peripheral face at the long side direction both ends of developer carrier.

Wherein, the upstream side of interception portion and framework partly is wholely set.In other words, interception portion and framework are not two parts, so do not have the gap with the external communications of framework between interception portion and the framework.Therefore the developer that spills from the outer peripheral face at the long side direction both ends of developer carrier is intercepted at towards the way of interception portion and interception portion, can prevent to escape to outside the framework.

The utility model of being put down in writing according to technical scheme 2, peripheral part of interception portion is compared in the upstream side part of interception portion and framework, the direction of separating towards the outer peripheral face from developer carrier caves in, the developer that spills from the outer peripheral face at the long side direction both ends of developer carrier is stopped, thereby can tackle this developer reliably.

The utility model of being put down in writing according to technical scheme 3, sense of rotation upstream-side-end in interception portion, be provided with towards the side-prominent wall portion of the outer peripheral face of developer carrier, even therefore flowed to the sense of rotation upstream side of interception portion by the developer of interception portion interception, flowing of developer also can be stopped by wall portion.Thus, can prevent that developer from spilling from interception portion.

According to the utility model that technical scheme 4 is put down in writing, the end face of the sense of rotation upstream side of wall portion is provided with than wall portion also towards the side-prominent thin film component of the outer peripheral face of developer carrier.Therefore, even flow to the sense of rotation upstream side of interception portion by the developer of interception portion interception, flowing of developer not only stopped by wall portion, also stopped by thin film component.Thus, can prevent that developer from spilling from interception portion.

According to the utility model that technical scheme 5 is put down in writing, thin film component is erected between the sense of rotation upstream side end face of wall portion of the sense of rotation upstream side end face of wall portion of the distolateral interception portion of long side direction one and another distolateral interception portion of long side direction.Therefore, even the developer of upstream side part meta in the zone of being clamped by the end face of long side direction both end sides of framework flows to the sense of rotation upstream side, flowing of developer also can be stopped by thin film component, therefore can prevent that this regional developer from escaping to outside the framework.

The utility model of being put down in writing according to technical scheme 6, the end face of the sense of rotation upstream side of the marginal portion of the sense of rotation upstream side end face of wall portion and framework split shed portion is on a face, therefore needn't crooked above-mentioned thin film component, can be installed to once on two end faces.Can save the time that thin film component is installed respectively at each front end face thus.

And the thin film component of being installed on the end face of the sense of rotation upstream side of the marginal portion of framework split shed portion can stop the developer that flows to the sense of rotation upstream side near peristome, therefore can prevent that developer is outside peristome flows out to framework.

According to the utility model that technical scheme 7 is put down in writing, framework inside is divided into first Room of configuration developer carrier by partition wall and accommodates second Room of the developer that offers developer carrier.And framework can be divided into first framework that partition wall is set and second framework 43 of interception portion is set.

When on second framework, having partition wall, the shape of second framework more complicated that becomes, therefore under the situation with mould molding second framework, it is complicated that the mould of second framework also becomes, and therefore has to correspondingly be provided with respectively interception portion and second framework (being framework).But can be by partition wall be set on first framework, rather than be arranged on second framework, make the shape of the mould of second framework and second framework become fairly simple, therefore interception portion can be wholely set on second framework.

Description of drawings

Fig. 1 is the sectional view of expression as an embodiment of the printer of an example of the utility model image processing system.

Fig. 2 is a skeleton view of observing the development shell of Delevoping cartridge from front left side.

Fig. 3 (a) is the front view of development shell.

Fig. 3 (b) is that the A-A of Fig. 3 (a) is to cut-open view.

The state of sidepiece strip of paper used for sealing is installed on the development shell in Fig. 4 presentation graphs 2.

Fig. 5 is illustrated in the state that with dashed lines among Fig. 4 has additional developer roll.

The state of developer roll and gear cover is installed on the development shell in Fig. 6 presentation graphs 4.

Fig. 7 is a skeleton view of observing Delevoping cartridge from forward right side.

Embodiment

1, printer

Fig. 1 is the sectional view of expression as an embodiment of the printer of an example of the utility model image processing system.And, aspect direction, with reference to illustrated direction arrow (other figure are too).Wherein, left and right directions is identical with Width, and above-below direction is identical with vertical direction.And horizontal direction comprises Width and fore-and-aft direction.

Printer 1 is a color printer.As shown in Figure 1, printer 1 has the main body cover 2 of the roughly box shape of growing on fore-and-aft direction.In main body cover 2, dispose four photosensitive drums 3 side by side with the state that rotates freely along fore-and-aft direction.On each photosensitive drums 3, relatively dispose the charged device 4 of grid electrode (scorotron) type and as the developer roll 5 of an example of developer carrier.And on each photosensitive drums 3, disposed adjacent has and keeps developer roll 5, accommodates the Delevoping cartridge 6 as the toner of an example of developer.Delevoping cartridge 6 plays the effect of an example of developing apparatus, has four equally with photosensitive drums 3.Each Delevoping cartridge 6 can be installed on main body cover 2 with freely loading and unloading.In each Delevoping cartridge 6, at the surface of developer roll 5 (outer peripheral face) carrying toner.

When forming image, expose by the laser beam (with reference to the diagram dotted arrow) that penetrates from the scanning element 7 that is located at main body cover 2 tops by behind charged device 4 uniform chargeds in the surface of each photosensitive drums 3.The surface of each photosensitive drums 3 forms the electrostatic latent image based on view data thus.The electrostatic latent image of each photosensitive drums 3 is by being carried on the developer roll 5 lip-deep toners corresponding with each photosensitive drums 3 and visual imageization, thereby forms toner image on the surface of each photosensitive drums 3.Wherein, the color of toner that is housed in 6 li of each Delevoping cartridges is different accordingly with each Delevoping cartridge 6, so the color of the toner image of each photosensitive drums 3 is different accordingly with each photosensitive drums 3.

As the paper S of an example of recording medium to be housed in the paper feeding cassette 8 that is disposed at main body cover 2 bottoms to the state that piles up towards upper and lower.When forming image, be housed in the paper S that is positioned at the top side among the paper S of paper feeding cassette 8 and send towards rear side by paper feed roller 9 from top and the adjacent setting of paper feeding cassette 8 rearward end.The paper S that sends changes direction and rises from rear side towards the front side.

The paper S that rises enters between a pair of registration roller 10.A pair of registration roller 10 passes out to paper S the travelling belt 11 of front side with predetermined sequential.

Travelling belt 11 is an annular, and the territory, lateral areas disposes four transfer rolls 12 within it.Four transfer rolls 12 dispose side by side along fore-and-aft direction, and each transfer roll 12 clips the upper portion of travelling belt 11 and relative from below and pairing photosensitive drums 3.

The paper S that sends from a pair of registration roller 10 carries out the transition to the upper portion of travelling belt 11.Afterwards, travelling belt 11, transmits the paper S of its upper portion around moving by the clockwise direction in Fig. 1 towards the front side.Each photosensitive drums 3 lip-deep toner image is transferred to the last and coincidence successively of the paper S that is sent by travelling belt 11 by the transfer bias that is applied on the transfer roll 12.Wherein, corresponding to each photosensitive drums 3, the color difference of the toner image of each photosensitive drums 3, therefore the toner image of four kinds of colors overlaps the result on paper S, forms coloured image on paper S.

The paper S that forms coloured image is sent to the photographic fixing portion 13 of front side by travelling belt 11.Wherein, the toner image of each photosensitive drums 3 of transfer printing on paper S carries out hot photographic fixing in photographic fixing portion 13.Afterwards, paper S is by the transmission of transfer roller 14, and side changes direction and rises backwards from the front side, thereby is discharged on row's paper disc 15 on main body cover 2 tops.

2, Delevoping cartridge

Below, Delevoping cartridge 6 is described.When explanation Delevoping cartridge 6, the state when being installed in main body cover 2 with Delevoping cartridge 6 is as benchmark.Therefore and in four Delevoping cartridges 6, except that the toner color difference of accommodating, structure separately is identical, in Fig. 1, describes with reference to the 6 pairs of Delevoping cartridges 6 of Delevoping cartridge that are positioned at rear side.

(1) summary of Delevoping cartridge

Delevoping cartridge 6 mainly has above-mentioned developer roll 5, bed thickness limiting scraper 21, donor rollers 22 in the development shell 20 as an example of the framework that constitutes its profile.

Development shell 20 is and is formed with box shape long on the Width of peristome 23 (with reference to Fig. 2 of explanation hereinafter) in the lower end.In development shell 20, the upside slightly in its bottom is provided with the partition wall 24 that extends towards rear side (rear wall 32 of development shell 20) continuously from the lower end of development shell 20 antethecas 31.Between the rear wall 32 of the rear end of partition wall 24 and development shell 20, form predetermined gap (being called connected entrance 25).In the inside of development shell 20, the upper-side area of partition wall 24 constitutes toner reception room 26, and the underside area of partition wall 24 constitutes the developing room 27 that is communicated with opening 23.That is, partition wall 24 is toner reception room 26 and developing room 27 with the internal separation of development shell 20.And toner reception room 26 communicates with each other by connected entrance 25 with developing room 27.Toner reception room 26 is as an example of second Room and play a role, and developing room 27 is as an example of first Room and play a role.Describe development shell 20 later in detail.

Longer on developer roll 5 its Widths, in other words, the axis of developer roll 5 extends along Width.Developer roll 5 comprises for example with metal development roll shaft 5A, the Width both ends rubber rollers 5B cylindraceous in addition that covers development roll shaft 5A that extends towards Width.Developer roll 5A and rubber rollers 5B round center separately is consistent with the axis of developer roll 5.And developer roll 5 is housed in the developing room 27, can be supported on rotatably on the development shell 20.The axis of developer roll 5 is consistent with the turning axle of developer roll 5.Developer roll 5 peristome 23 forward downside expose, also contact from back upside and pairing photosensitive drums 3 are relative.So, developer roll 5 can be supported on the development shell 20 rotatably at peristome 23.

Bed thickness limiting scraper 21 has the plate spring component 28 of the film shape of growing on the Width and is located at the crimping rubber 29 of the rearward end of plate spring component 28.Plate spring component 28 relatively disposes from downside and above-mentioned partition wall 24, and crimping rubber 29 passes through the outer peripheral face crimping of the elastic force of plate spring component 28 from top and developer roll 5 (rubber rollers 5B).

Donor rollers 22 is the same longer on Width with developer roll 5.Donor rollers 22 is configured near the separatrix (being the downside of connected entrance 25 strictly) of toner reception room 26 and developing room 27, is supported on the development shell 20 with rotating freely.The axis of donor rollers 22 is consistent with the turning axle of donor rollers 22.Under this state, donor rollers 22 is from back upside and developer roll 5 relative and contacts.

In toner reception room 26, contain the toner that offers developer roll 5.Wherein, use for example polymerization toner of non-magnetic monocomponent as toner.It is roughly spherical that polymerization toner is, good fluidity.And, in toner reception room 26, be provided with stirrer 30.Stirrer 30 is that the center freely rotates with the turning axle that extends towards Width in toner reception room 26.

When forming image as mentioned above, the toner in the toner reception room 26 is obtained stirring by the rotation of stirrer 30, and drops to the developing room 27 from connected entrance 25, thereby offers donor rollers 22.Afterwards, by the rotation of donor rollers 22, toner offers developer roll 5.Follow the rotation of developer roll 5, the toner that offers developer roll 5 enters between the outer peripheral face of the crimping rubber 29 of bed thickness limiting scraper 21 and developer roll 5 (rubber rollers 5B), and bed thickness crack betwixt is restricted, and is carried to as thin layer on the outer peripheral face of developer roll 5.

(2) concrete condition of Delevoping cartridge

Fig. 2 is a skeleton view of observing the development shell of Delevoping cartridge from front left side.(a) is the front view of development shell among Fig. 3, (b) is the A-A skeleton view of (a).The state of sidepiece strip of paper used for sealing is installed on the development shell in Fig. 4 presentation graphs 2.Fig. 5 is illustrated in the state of with dashed lines increase developer roll among Fig. 4.The state of developer roll and gear cover is installed on the development shell in Fig. 6 presentation graphs 4.Fig. 7 is a skeleton view of observing Delevoping cartridge from forward right side.

In the following description, the sense of rotation of developer roll 5 is, shown in the thick dashed line arrow of Fig. 1 (with reference to the Delevoping cartridge 6 of front side), after the part relative of developer roll 5 with donor rollers 22 with bed thickness restraint device 21 and then the direction (in left side view be clockwise direction) relative successively with photosensitive drums 3.And the upstream side and the downstream of the sense of rotation of developer roll 5 represent, the relative position relation of two positions when the direction (tangential direction that also comprises circumferencial direction) along the circumferencial direction of developer roll 5 goes up sense of rotation with developer roll 5 and is benchmark.

(2-1 development shell)

As shown in Figure 2, development shell 20 is included on the Width across the left wall 33 of configuration at interval and relatively and right wall 34, roof 35 except that above-mentioned antetheca 31 and rear wall 32.

Wherein, antetheca 31 generally perpendicularly extends, and rear wall 32 forward downside extend (with reference to the Delevoping cartridge 6 of the rear side among Fig. 1).That is, antetheca 31 narrows down along with relying on the below at interval with the front and back of rear wall 32.And, in rear wall 32, part in the way of the above-below direction consistent with donor rollers 22, in mode along the rear side outer peripheral face of donor rollers 22, bulge into towards rear side circular-arc, thereby constitute protrusion 32A (with reference to the rear side Delevoping cartridge 6 among Fig. 1).The following ora terminalis of rear wall 32 extends along Width.

Left side wall 33 is erected between the left end of the left end of antetheca 31 and rear wall 32.Right wall 34 is erected between the right-hand member of the right-hand member of antetheca 31 and rear wall 32.As mentioned above, owing to the front and back of antetheca 31 and rear wall 32 narrow down (with reference to Fig. 1) along with relying on the below at interval, therefore left wall 33 and right wall 34 are the general triangular shape that narrows down along with relying on the below respectively.

Roof 35 adds stifled antetheca 31, rear wall 32, left wall 33 and right wall 34 part that the upper end surrounded separately from the top.

And the following ora terminalis of antetheca 31 extends along Width, is arranged in than any one the high upside in lower end of rear wall 32, left wall 33 and right wall 34.Above-mentioned peristome 23 is formed by the following ora terminalis of antetheca 31, the following ora terminalis of rear wall 32, the bottom of left wall 33 and the bottom division of right wall 34, is with essentially rectangular long on the Width in front view.And the space that the bottom of the partition wall 24 that extends towards rear side continuously from the lower end of antetheca 31, rear wall 32 (the specifically part of protrusion 32A and protrusion 32A downside), left wall 33 and the bottom of right wall 34 surround promptly is above-mentioned developing room 27.

A left side demarcates the axle support slot 37 that is formed with respectively on the bottom (be called and divide part 34A) that demarcates oral area 23 in the bottom (be called and divide part 33A) of oral area 23 and the right wall 34 from separately front-end edge (marginal portion of peristome 23) upside incision backwards in the wall 33.A support slot 37 of axle support slot 37 and the right wall 34 of left side wall 33 is roughly consistent when Width is seen.In each shaft supporting part 37, the fixed position that its deep 37A (rear side upper end) constitutes developer roll 5 (being development roll shaft 5A strictly) (with reference to Fig. 3 (b) and Fig. 5).

In development shell 20, around peristome 23 (in the developing room 27) be provided with left wall 33 and right wall 34 division part (33A, 34A) separately for one, from left wall 33 and right wall 34 Width medial surface separately towards the inboard strip of paper used for sealing pedestal part 38 of extending of Width.In other words, strip of paper used for sealing pedestal part 38 is located at the two ends of the peristome 23 of Width in development shell 20.

Strip of paper used for sealing pedestal part 38 is the flexure plane (with reference to Fig. 3 (b)) of the roughly arc shape that caves in towards the rear in the mode along the outer peripheral face that is supported on the developer roll 5 on the development shell 20 when Width is seen.And when Width was seen, an axle support slot 37 (with reference to Fig. 3 (b)) was positioned at and is roughly the inboard of the strip of paper used for sealing pedestal part 38 of arc shape (zone, front side).

Wherein, when Width was seen, in each left wall 33 and right wall 34, with the protrusion 32A of rear wall 32 roughly on the consistent location, the axle that is formed with the axle of inserting logical donor rollers 22 (with reference to Fig. 1) was inserted logical portion 39.It is with the hole of wall corresponding in left wall 33 and the right wall 34 towards the Width perforation that axle is inserted logical portion 39, and the strip of paper used for sealing pedestal part 38 that will be positioned at same side on Width is cut to first 38A of downside and second 38B (with reference to Fig. 3 (b)) of upside.Shown in Fig. 3 (b), in each strip of paper used for sealing pedestal part 38, first 38A inserts the crooked extension of downside forward of logical portion 39 from axle, and second 38B inserts logical portion 39 from axle and extend towards front upper side is crooked.

And, as shown in Figure 2, from axle insert logical portion 39 forward among the inside surface 32C that excavates in the bottom of rear wall 32 32B (lower portion of protrusion 32A) of crooked first 38A that extends of downside (face relative, the face of front upper side) with developing room 27, be the end of same side on Width.That is,, be formed with the recess 50 of bottom by pairing first 38A regulation at the both ends of the Width of inside surface 32C.

Front end (lower end) at each recess 50 (first 38A) is provided with integratedly towards the outstanding wall portion 51 of front upper side.The general triangular of the cross sectional shape of the wall portion 51 when Width is seen for attenuating towards front upper side, downside adds the front end (lower end) of stifled corresponding concave part 50 in the past.

The front end face 51A of left and right sides wall portion 51 is continuous from the front end face 32D of the both sides of Width and rear wall 32 lower ends.And, the front end face 51A of left side wall portion 51 is continuous from front end face 33B (lower portion of the axle support slot 37) lower end of the division part 33A of right side and left wall 33, and the front end face 51A of right side wall portions 51 is continuous from front end face 34B (lower portion of the axle support slot 37) lower end of the division part 34A of left side and right wall 34.That is, the front end face 34B of the front end face 51A of the front end face 32D of the front end face 51A of the front end face 33B of left wall 33, left side wall portion 51, rear wall 32, right side wall portions 51, right wall 34 (is referred to as stickup face 52 with these end faces) on a face.Stickup face 52 is the roughly U word shape of the open broadness of upside in front view, be the tabular surface of approximate vertical, demarcates the downside (with reference to Fig. 3 (b)) of oral area 23.

And, in left wall 33 and right wall 34, with second 38B of strip of paper used for sealing pedestal part 38 on the continuous part of upside, be respectively equipped with threaded hole 40.

Wherein, longer at Width from the lower end of antetheca 31 as mentioned above towards the partition wall 24 that rear side (being specially the protrusion 32A of rear wall 32) extends continuously, be configured between left wall 33 and the right wall 34.Under this state, when Width was seen, partition wall 24 was positioned near (with reference to Fig. 3 (b)) of left wall 33 and right wall 34 threaded hole 40 separately.

And, as shown in Figure 6, insert logical screw 41 at the Width both ends of the plate spring component 28 of bed thickness limiting scraper 21, with each screw 41 be screwed into at the consistent threaded hole 40 (with reference to Fig. 2) of Width, thereby bed thickness limiting scraper 21 is erected between left wall 33 and the right wall 34, is fixed on left wall 33 and the right wall 34.Under this state, downside is relative with partition wall 24 in the past as mentioned above for plate spring component 28.In addition, gap, left wall 33 and the right wall 34 that adds stifled partition wall 24 and plate spring component 28 with sponge etc. separately with the gap of plate spring component 28 (Fig. 6 shows the sea 36 of stopping up partition wall 24 and the gap of plate spring component 28).

Wherein, shown in Fig. 3 (b), in development shell 20, partition wall 24 is integrally formed with antetheca 31, thereby constitute first framework 42 (with reference to being coated with part a bit), first framework 42 can the part (being called second framework 43) beyond first framework 42 separate from development shell 20.Second framework 43 (with reference to the part that is not coated with in the development shell 20 a little) constitutes the disk shape of front side all-round opening with monomer.First framework 42 and second framework 43 are respectively by the mould molding of special use.And above-mentioned recess 50 is formed on the rear wall 32 of second framework, 43 sides, and the shell 20 that therefore develops can be divided into first framework 42 that is provided with partition wall 24 and second framework 43 that is provided with recess 50.

(2-2) sidepiece strip of paper used for sealing

As shown in Figure 4, in development shell 20, be provided with the counter-lateral quadrents strip of paper used for sealing 45 as an example of seal member in the both sides of the peristome 23 of Width, the toner that this sidepiece strip of paper used for sealing 45 is used to prevent to be carried on the developer roll 5 (with reference to Fig. 1) escapes to outside the development shell 20 from the outer peripheral face at the Width both ends of developer roll 5.In addition, only show the sidepiece strip of paper used for sealing 45 (hereinafter Shuo Ming Fig. 5 too) on right side among Fig. 4.

Sidepiece strip of paper used for sealing 45 forms banded chip shape, has ground floor 45A and second layer 45B.Sidepiece strip of paper used for sealing 45 is longer along the face direction along the strip of paper used for sealing pedestal part 38 that is arc shape roughly.

Ground floor 45A is thicker, is for example formed by flexible foaming materials such as urethanes sponges.

Second layer 45B is for example formed by felt material.Though it is second layer 45B is roughly the same with the shape of ground floor 45A, and is thinner than ground floor 45A, narrower slightly than ground floor 45A width.Second layer 45B with the stacked state of ground floor 45A, stick on the ground floor 45A.Thus, ground floor 45A and second layer 45B constitute one.

This sidepiece strip of paper used for sealing 45 pastes on each strip of paper used for sealing pedestal part 38 of left wall 33 and right wall 34 and (state of only pasting sidepiece strip of paper used for sealing 45 on the strip of paper used for sealing pedestal part 38 of right wall 34 has been shown) among Fig. 4.

Particularly, in strip of paper used for sealing pedestal part 38, by double sticky tape (not shown) its mode across first 38A and second 38B (to add the mode of being inserted the part that logical portion 39 cuts off by axle that blocks in the bar pedestal part 38) is sticked on first 38A and second 38B ground floor 45A of sidepiece strip of paper used for sealing 45.Under this state, the integral body of sidepiece strip of paper used for sealing 45 along 38 bendings of strip of paper used for sealing pedestal part, is the roughly arc shape of depression towards the rear when Width is seen.And in sidepiece strip of paper used for sealing 45, ground floor 45A is relative with pairing strip of paper used for sealing pedestal part 38 from the front side, and the relative ground floor 45A of second layer 45B is positioned at the opposition side of strip of paper used for sealing pedestal part 38, exposes towards the front side from peristome 23.

And, in sidepiece strip of paper used for sealing 45, stick on first part on the 38A and expose the state of (also will be, outstanding) from recess 50 towards front upper side towards developing room 27 inside than the inside surface 32C of rear wall 32 with second layer 45B at least, be housed in the recess 50.At this moment, about front end (lower end) zone of (right side among Fig. 4) recess 50 do not have sidepiece strip of paper used for sealing 45, this zone constitutes space, thereby constitutes the toner groove (Pocket) 53 as an example of interception portion.

Fig. 5 is illustrated under the state that sidepiece strip of paper used for sealing 45 is installed on the development shell 20, and then the state of developer roll 5 is installed on development shell 20.

With reference to Fig. 5, about the installation of developer roll 5 on development shell 20, at first developer roll 5 is configured to from the front side relatively, afterwards the Width both ends of the development roll shaft 5A of developer roll 5 is embedded in the axle support slot 37 of wall that left wall 33 and right wall 34 Width is in same side from the front side with peristome 23.At this moment, in the developer roll 5, the outer peripheral face at the Width both ends of rubber rollers 5B is relative with the strip of paper used for sealing pedestal part that Width the strip of paper used for sealing pedestal part 38 of the strip of paper used for sealing pedestal part 38 of left wall 33 and right wall 34 is in same side from the front side.Afterwards, the Width both ends of development roll shaft 5A are continued to be embedded in the pairing axle support slot 37, when the Width both ends of development roll shaft 5A arrive the deep 37A of corresponding axle support slot 37 (with reference to Fig. 3 (b)), the installation on development shell 20 of developer roll 5 finishes.

Developer roll 5 is under the state that the installation on the development shell 20 finishes, as shown in Figure 5, in the developer roll 5, the deep 37A chimeric (with reference to Fig. 3 (b)) of the Width both ends of development roll shaft 5A and the axle support slot 37 of the wall that in left wall 33 and right wall 34, on Width, is positioned at same side.Wherein, strictly, as shown in Figure 6, the Width both ends of development roll shaft 5A are chimeric with the deep 37A (with reference to Fig. 5) of pairing axle support slot 37 under the state that bearing 46 is installed respectively, under this state, developer roll 5 is supported on the left wall 33 and right wall 34 of development shell 20 by each bearing 46 with rotating freely.

And, under this state, as shown in Figure 5, in developer roll 5, the rear side outer peripheral face at the Width both ends of rubber rollers 5B (with reference to the right part of the rubber rollers 5B among Fig. 5) with stick on Width on the sidepiece strip of paper used for sealing 45 that is positioned on the strip of paper used for sealing pedestal part 38 of same side contact, push this sidepiece strip of paper used for sealing 45 from the front side towards strip of paper used for sealing pedestal part 38.That is, the sidepiece strip of paper used for sealing 45 that sticks on the strip of paper used for sealing pedestal part 38 is subjected to be positioned on the Width strip of paper used for sealing pedestal part 38 of same side and the compression of the outer peripheral face of the Width end of rubber rollers 5B.Thus, sidepiece strip of paper used for sealing 45 shutoff seamlessly is on the Width between the outer peripheral face in the Width end of the strip of paper used for sealing pedestal part 38 of same side and rubber rollers 5B.Wherein, in sidepiece strip of paper used for sealing 45, second layer 45B fits tightly along the outer peripheral face of the Width end of the outer peripheral face of the Width end of rubber rollers 5B and rubber rollers 5B.And sidepiece strip of paper used for sealing 45 extends because of the direction along the face of strip of paper used for sealing pedestal part 38 by compression, thereby the end of its front upper side arrives bed thickness limiting scraper 21 (with reference to Fig. 6 and Fig. 7).

When under this state, rotating developer roll 5, the second layer 45B sliding contact of the rear side outer peripheral face at the Width both ends of developer roll 5 (rubber rollers 5B) and each sidepiece strip of paper used for sealing 45.Thus, prevent that toner from being escaped to the Width outside by the zone of the second layer 45B clamping of left and right sides sidepiece strip of paper used for sealing 45 (only showing right side sidepiece strip of paper used for sealing 45 Fig. 5) from the outer peripheral face of rubber rollers 5B.

Wherein, in Fig. 5, shown in the thick dashed line arrow, the sense of rotation of above-mentioned developer roll 5 (with reference to the thick dashed line direction of arrow of Fig. 1) is, in sidepiece strip of paper used for sealing 45 along sidepiece strip of paper used for sealing 45 crooked and in the past downsides towards the direction of front upper side.

In the bottom 32B of the rear wall 32 of development shell 20, when the part that each sidepiece strip of paper used for sealing 45 relatively is positioned at the sense of rotation upstream side of developer roll 5 was set at upstream side part 32E, upstream side part 32E was the most preceding lower portion of the bottom 32B of rear wall 32.Above-mentioned left and right sides toner groove 53 is wholely set (formation) on this upstream side part 32E, and is relative with the outer peripheral face at the Width both ends of developer roll 5 (rubber rollers 5B) from downside.And each toner groove 53 is adjacent with the sidepiece strip of paper used for sealing 45 that is positioned at same side at Width from the sense of rotation upstream side of developer roll 5.

Here, be benchmark with the sense of rotation (being designated hereinafter simply as [sense of rotation X]) and the upstream side part 32E of developer roll 5, structure of toner groove 53 etc. is described.At first, peripheral part (being inside surface 32C) of the toner groove 53 among toner groove 53 and the upstream side part 32E is compared, direction (downside) depression of separating towards the outer peripheral face from developer roll 5.And above-mentioned wall portion 51 is located at the upstream-side-end of sense of rotation X in toner groove 53, side-prominent towards the outer peripheral face of developer roll 5.And, the front end face 51A of wall portion 51 is the end face of the upstream side of wall portion 51 on sense of rotation X, with the marginal portion of the peristome 23 of development shell 20 at the upstream side end face on the sense of rotation X (that is the front end face 34B of the front end face 32D of the front end face 33B of left wall 33, rear wall 32 and right wall 34) on a face.

And, during the outer peripheral face sliding contact at Width both ends of the second layer 45B of each sidepiece strip of paper used for sealing 45 and the developer roll 5 of rotation as mentioned above, be in the toner of outer peripheral face at the Width both ends of developer roll 5, by the sidepiece strip of paper used for sealing 45 of correspondence, wipe the upstream side that rubs sense of rotation X from the outer peripheral face at the Width both ends of developer roll 5.Thus, the upstream side of sense of rotation X peeled off and drains to by the toner that is in the Width both ends outer peripheral face of developer roll 5 from the outer peripheral face at the Width both ends of developer roll 5.Afterwards, from the toner that the outer peripheral face at the Width both ends of developer roll 5 spills, the upstream side that rests on sense of rotation X with respect to pairing sidepiece strip of paper used for sealing 45 is a toner groove 53, by 53 interceptions of toner groove.

(2-3) thin film component

As shown in Figure 6, thin film component 54 is installed on development shell 20.Thin film component 54 for example uses PET sheet material, urethane rubber film.Thin film component 54 is the long essentially rectangular shape of Width, its Width both ends and bottom stick on the roughly whole zone of above-mentioned stickup face 52 (demarcating the part of oral area 23 downsides in the development shell 20, with reference to Fig. 5) by double sticky tape (not shown).

Here, the front end face 51A of each wall portion 51 about stickup face 52 includes as mentioned above, therefore thin film component 54 is located on the 51A as can be seen.

And, in Fig. 6, the edge of outer peripheral face side among the front end face 32D of the front end face 51A of each wall portion 51 and rear wall 32, developer roll 5 about having dotted (going up ora terminalis), thin film component 54 is more side-prominent towards the outer peripheral face of developer roll 5 than each wall portion 51.And thin film component 54 is erected between the front end face 51A of wall portion 51 of toner groove 53 of the front end face 51A of wall portion 51 of toner groove 53 of Width one distolateral (left side) and Width another distolateral (right side).

So, by thin film component 54 is installed on development shell 20, above-mentioned upstream side part 32E (downside of peristome 23) goes up and forms the groove 55 (with reference to Fig. 3 (b)) that is marked off by rear wall 32, left wall 33, right wall 34 and thin film component 54.Groove 55 is towards direction (downside) depression of separating from the outer peripheral face of developer roll 5 (rubber rollers 5B), and extends towards Width under the state relative with the whole zone of Width of the outer peripheral face of developer roll 5.Reclaimed by groove 55 from the unrestrained toner of the outer peripheral face of developer roll 5, the toner that overflows from toner groove 53, thereby can not escape to the outside of Delevoping cartridge 6 from peristome 23.

(2-4) other

As shown in Figure 7, in Delevoping cartridge 6, dispose gear mechanism 60 on the right wall 34 of development shell 20.Gear mechanism 60 constitutes by connecting gear 61, detection of gear 62 and other not shown a plurality of gears.The driving force that gear mechanism 60 receives from main body cover 2 (with reference to a Fig. 1) side by connection gear 61, and pass to developer roll 5, donor rollers 22 and stirrer 30 (with reference to Fig. 1).Thus, developer roll 5, donor rollers 22 and stirrer 30 rotations.And, when detection of gear 62 is installed on the main body cover 2 at Delevoping cartridge 6, rotate scheduled volume (also having non-rotary situation) by receiving from the driving force of main body cover 2 one sides, thus, relevant with Delevoping cartridge 6 information (whether Delevoping cartridge 6 is new product etc.) is input to the control part (not shown) that is located at main body cover 2 one sides.

And Delevoping cartridge 6 has gear cover 63.Gear cover 63 is two parts with development shell 20, is installed to from the right side on the right wall 34 of development shell 20, covers the part except connecting gear 61 and detection of gear 62 gear mechanism 60 from the right side.

3. action effect

(1) as shown in Figure 5, in this Delevoping cartridge 6, developer roll 5 rotatably is supported on the development shell 20 at peristome 23.Be housed in toner in the development shell 20 and be carried on the outer peripheral face of developer roll 5 (rubber rollers 5B).

And, in development shell 20, the sidepiece strip of paper used for sealing 45 (only illustrating the sidepiece strip of paper used for sealing 45 on right side in Fig. 5) that is arranged at peristome 23 both sides on the long side direction (Width) of developer roll 5 contacts with the outer peripheral face at the Width both ends of developer roll 5, prevents that toner from spilling from the outer peripheral face at the Width both ends of developer roll 5.

And, in development shell 20 (being specially rear wall 32), be positioned at respect to sidepiece strip of paper used for sealing 45 on the upstream side part 32E of upstream side of sense of rotation X of developer roll 5, be provided with toner groove 53.Toner groove 53 is relative with the outer peripheral face at the Width both ends of developer roll 5, the toner that interception spills from the outer peripheral face at the Width both ends of developer roll 5.

Wherein, toner groove 53 is wholely set with the upstream side part 32E of development shell 20.In other words, toner groove 53 is not two parts with development shell 20, so does not have the gap with the external communications of development shell 20 between toner groove 53 and the development shell 20.Therefore the toner that spills from the outer peripheral face at the Width both ends of developer roll 5 is intercepted at towards the way of toner groove 53 and toner groove 53, can prevent to escape to outside the development shell 20.

In addition, different with the utility model, when toner groove 53 is not located on the development shell 20, and when being provided in a side of on the above-mentioned gear cover 63 (with reference to Fig. 6 and Fig. 7), because gear cover 63 is two parts with development shell 20, therefore between toner groove 53 and development shell 20, certainly lead to gap with the external communications of development shell 20.

(2) toner groove 53 is compared with peripheral part (being inside surface 32C) of toner groove 53 among the upstream side part 32E, the direction of separating towards the outer peripheral face from developer roll 5 caves in, therefore, the toner that spills from the outer peripheral face at the Width both ends of developer roll 5 is stopped, thereby can tackle this toner reliably.

(3) in the sense of rotation X of toner groove 53 upstream-side-end, be provided with towards the side-prominent wall portion 51 of the outer peripheral face of developer roll 5, even therefore flowed to the sense of rotation X upstream side (edge side of peristome 23) of toner groove 53 by the toner of toner groove 53 interceptions, flowing of toner also can be stopped by wall portion 51.Thus, can prevent that toner from spilling from toner groove 53.

(4) as shown in Figure 6, the front end face 51A of the sense of rotation X upstream side of wall portion 51 is provided with than wall portion 51 also towards the side-prominent thin film component 54 of the outer peripheral face of developer roll 5.Therefore, even flow to the upstream side of the sense of rotation X (with reference to Fig. 5) of toner groove 53 by the toner of toner groove 53 interception, flowing of toner not only stopped by wall portion 51, also stopped by thin film component 54.Thus, can prevent that toner from spilling from toner groove 53.

(5) thin film component 54 is erected between the front end face 51A of wall portion 51 of toner groove 53 of the front end face 51A of wall portion 51 of toner groove 53 of Width one distolateral (left side) and Width another distolateral (right side).Therefore, even the toner that is arranged in the zone that the front end face 51A by the Width both end sides clamped among the upstream side part 32E of development shell 20 flows to the upstream side of sense of rotation X (with reference to Fig. 5), flowing of toner also can be stopped by thin film component 54, therefore can prevent that this regional toner from escaping to outside the development shell 20.

Certainly, also can not set up thin film component 54, and only on the front end face 51A of the wall portion 51 of each toner groove 53 of Width both end sides, thin film component 54 is set.

(6) as shown in Figure 5, the marginal portion of the front end face 51A of each wall portion 51 and development shell 20 split shed portions 23 at the end face (the front end face 34B of the front end face 33B of left wall 33, the front end face 32D of rear wall 32 and right wall 34) of the upstream side on the sense of rotation X on a face, therefore needn't crooked above-mentioned thin film component 54, can be installed to once (with reference to Fig. 6 and Fig. 7) on these front end faces.Can save the time that thin film component 54 is installed respectively at each front end face thus.

And, the thin film component 54 (with reference to Fig. 6 and Fig. 7) that the marginal portion of development shell 20 split shed portions 23 is installed on the end face (in other words being above-mentioned stickup face 52) of the upstream side on the sense of rotation X, therefore near the toner that can stop the upstream side that flows to sense of rotation X peristome 23 can prevent that toner is outside peristome 23 flows out to development shell 20.

(7) shown in Fig. 3 (b), the inside of development shell 20 is divided into the developing room 27 of configuration developer roll 5 by partition wall 24 and accommodates the toner reception room 26 of the toner that offers developer roll 5.And development shell 20 can be divided into first framework 42 that partition wall 24 is set and second framework 43 (simultaneously with reference to Fig. 5) of toner groove 53 is set.

When on second framework 43, having partition wall 24, the shape of second framework 43 more complicated that becomes, therefore under the situation with mould molding second framework 43, it is complicated that the mould of second framework 43 also becomes, and therefore has to correspondingly be provided with respectively toner groove 53 (with reference to Fig. 5) and second framework 43 (shell 20 promptly develops).At this moment, toner groove 53 can be set on above-mentioned gear cover 63 (with reference to Fig. 6 and Fig. 7) etc.But can be by partition wall 24 be set on first framework 42, rather than be arranged on second framework 43, make the shape of the mould of second framework 43 and second framework 43 become fairly simple, therefore toner groove 53 can be wholely set on second framework 43.

4, variation

In this printer 1, as shown in Figure 1, make photosensitive drums 3 exposures, but replace scanning element 7 can also use LED to make photosensitive drums 3 exposures by the laser that is produced by scanning element 7.And the utility model is not limited to color printer, can also be useful in all types of image processing systems of the use toner that comprises black-and-white printer.

Claims

1. a developing apparatus is characterized in that, comprising:

Framework is formed with peristome, accommodates developer;

Developer carrier can be supported on the described framework bearing developer on outer peripheral face rotatably at described peristome;

Seal member, in described framework, be arranged on the both sides of the described peristome on the long side direction of described developer carrier, contact, prevent that developer from spilling from the outer peripheral face at the long side direction both ends of described developer carrier with the outer peripheral face at the long side direction both ends of described developer carrier; And

Interception portion, in described framework, be arranged on the upstream side part that is positioned at the sense of rotation upstream side of described developer carrier with respect to described seal member integratedly, the developer relative with the outer peripheral face at the long side direction both ends of described developer carrier, that interception spills from the outer peripheral face at the long side direction both ends of described developer carrier.

2. developing apparatus as claimed in claim 1 is characterized in that,

Described interception portion compares with peripheral part of interception portion described in the described upstream side part, the direction depression of separating towards the outer peripheral face from described developer carrier.

3. developing apparatus as claimed in claim 1 is characterized in that,

Described sense of rotation upstream-side-end in described interception portion is provided with towards the side-prominent wall portion of the outer peripheral face of described developer carrier.

4. developing apparatus as claimed in claim 3 is characterized in that,

Comprise thin film component, this thin film component is arranged on the end face of described sense of rotation upstream side of described wall portion, compares towards the outer peripheral face of described developer carrier side-prominent with described wall portion.

5. developing apparatus as claimed in claim 4 is characterized in that,

Described thin film component, be erected at the distolateral described interception portion of described long side direction one described wall portion described sense of rotation upstream side end face, and the end face of the described sense of rotation upstream side of the described wall portion of another distolateral described interception portion of described long side direction between.

6. developing apparatus as claimed in claim 4 is characterized in that,

The end face of the described sense of rotation upstream side of the marginal portion of peristome is on a face described in the end face of the described sense of rotation upstream side of described wall portion and the described framework.

7. as each described developing apparatus in the claim 1 to 6, it is characterized in that,

Comprise partition wall, this partition wall with described framework internal separation for first Room that disposes described developer carrier with accommodate second Room that the developer that provides to described developer carrier is provided,

8. an image processing system is characterized in that,

Comprise each described developing apparatus in the claim 1 to 7.