CN1728011A - Developing apparatus, process cartridge and image forming apparatus - Google Patents

Abstract

The invention relates to a development device, a processing box and an imaging device. A scraper back seal (87) with relatively lower elasticity rate and larger thickness is adhered to a scraper assembling part (46) and a seal configuration part (96), and a sponge sealing member (92) with relatively higher elasticity rate and smaller thickness is adhered to the roller opposite face (98) of the sealing configuration part (96); the scraper back seal (87) and the sponge sealing member (92) are pressed by the plate spring member (57) of a scraper assembly (40) and are gripped between the plate spring member (57) and the scraper assembling part (46) and the seal configuration part (96) in the status that the scraper back seal (87) and the sponge sealing member (92) are compressed to have the same thickness.

Description

Developing apparatus, handle box and imaging device

Technical field

The present invention relates to developing apparatus, handle box and imaging device.

Background technology

In the imaging device of laser printer etc.,, developer can be looked like be carried on the surface of photosensitive drums by on the surface of photosensitive drums, forming electrostatic latent image and developer being supplied with to this electrostatic latent image from developing apparatus.And,, reach the formation of image to printer paper by this developer is looked like to be printed on the printer paper.

Developing apparatus has: the framework of the peristome of oriented photosensitive drums opening; The developer carrier that the developer that is housed in this framework is carried; The bed thickness of the developer that carried is limited the scraper of usefulness on developer carrier.Developer carrier, on the peristome of framework, the state that exposes with the part on surface rotatably is being supported.Again, scraper is by constituting to the axially extended laminal elastic scraper of developer carrier and the support plate of this elastic scraper of supporting.Elastic scraper, need in the longitudinal direction developer carrier is pushed equably, in the longitudinal direction the relative support plate in upper end is carried out spot welding, the surface pressure of bottom and developer carrier is followed (for example, opening the 2001-356592 communique with reference to the Jap.P. spy) with each fixed (for example 10mm) at interval.And, the developer in the framework is supplied with on the surface of developer carrier, along with the rotation of developer carrier, by between the surface of scraper and developer carrier and become on the surface that certain thickness thin layer is carried on developer carrier.Be carried on the lip-deep developer of developer carrier, when contacting with the surface of photosensitive drums, formed electrostatic latent image is supplied with on the surface in photosensitive drums.

On such developing apparatus, usually, be provided with and prevent that toner from leaking the containment member of usefulness from the length direction both ends of developer carrier.Containment member, be configured in developer carrier the length direction both ends near, and push to the surface at the length direction both ends of this developer carrier.For example, proposed following technical proposals: upstream seal member and the downstream containment members different with mutual elasticity constitute such containment member, on the sense of rotation of developer carrier, at the big upstream seal member of upstream side configuration elasticity, at the little downstream containment member (for example, with reference to Japanese patent laid-open 11-73017 communique) of downstream configuration elasticity.

But, open the structure of being put down in writing in the flat 11-73017 communique the spy, because it is less that the pressing force to developer carrier that the downstream containment member causes becomes the pressing force to developer carrier that causes than upstream seal member, so there be the unfavorable condition of developer from leaking between downstream containment member and the developer carrier.

In addition, open the structure of being put down in writing in the 2001-356592 communique the spy, if from microcosmic, between each welding portion and each welding portion, the crimp force difference of the relative support plate of elastic scraper exists in the unfavorable condition that produces distortion on the elastic scraper.When producing distortion on the elastic scraper, since developer carrier axially on, the pressing force on the surface of the relative developer carrier of elastic scraper produces deviation, so can not be constrained to homogeneous thickness to the thin layer of the developer that on the surface of developer carrier, carried, its result presents undesirable deep or light for formed image on printer paper.

Summary of the invention

Therefore, the objective of the invention is to, the mutual elasticity of use different the 1st containment member and the 2nd containment member are provided, can prevent the developing apparatus that developer leaks reliably from the gap of pressing member on the peristome of framework and framework; Have the handle box of this developing apparatus and have the such developing apparatus or the imaging device of handle box.

Again, the objective of the invention is to, provide the distortion that can prevent scraper etc. bending, and can on the surface of developer carrier, carry the developing apparatus of thin layer of the developer of uniform thickness; Have the handle box of this developing apparatus and have the such developing apparatus or the imaging device of handle box.

In order to achieve the above object, developing apparatus of the present invention is characterized in that, has: the framework that the peristome of the flute profile of making is arranged; Along the configuration of the length direction of described peristome, can be rotated to support on the developer carrier on the described framework; And be configured on the peristome of described framework, push the pressing member of the 1st containment member and the 2nd containment member, described the 1st containment member, has the 1st spring rate, be configured on the peristome of described framework, state after being compressed with the 1st decrement between described pressing member and the described framework is held, prevent developer from described peristome described pressing member and the leakage the gap of described framework, described the 2nd containment member, have 2nd spring rate littler than described the 1st spring rate, on the peristome of described framework, be configured in abutting connection with ground with described the 1st containment member, and the state after being compressed with the 2nd decrement bigger than described the 1st decrement between described pressing member and the described framework is held, prevent developer from described peristome described pressing member and the leakage the gap of described framework.

Adopt such structure, because the 1st spring rate than the 2nd spring rate greatly and the 1st compressibility is more less than the 2nd compressibility, so can reduce the difference of the power that power that the 1st containment member pushes pressing member and framework and the 2nd containment member push pressing member and framework.Therefore, use the 1st different containment member of mutual elasticity and the 2nd containment member, can prevent reliably developer from the peristome of framework pressing member and the leakage the gap of framework.

Again, developing apparatus of the present invention is characterized in that, described the 1st containment member and described the 2nd containment member, by utilizing described pressing member to be compressed with described the 1st decrement and described the 2nd decrement respectively, the thickness on the relative direction of described framework and described pressing member is equated.

Adopt such structure, because the 1st containment member has identical thickness with the 2nd containment member, so can prevent between the 1st containment member and the 2nd containment member, to produce step, can prevent between the 1st containment member or the 2nd containment member and pressing member or framework, to produce the gap because of such step.Therefore, can prevent more reliably developer from the peristome of framework pressing member and the leakage the gap of framework.

Again, developing apparatus of the present invention is characterized in that, described pressing member constitutes by having than the high hard material of described the 1st containment member hardness.

If the rigidity of pressing member is lower,, might between pressing member and the 1st containment member, produce the gap because of reacting force from the 1st big containment member of spring rate.But, adopt this structure, owing to pressing member is made of hard material, thus can prevent between such pressing member and the 1st containment member, to produce the gap, and can utilize pressing member reliably the 2nd containment member to be pushed.Therefore, can prevent more reliably developer from the peristome of framework pressing member and the leakage the gap of framework.

Again, developing apparatus of the present invention is characterized in that, described pressing member is usefulness was pushed and the bed thickness of the developer that carried was limited to side's side end on described developer carrier to described developer carrier a doctor assemblies.

Adopt such structure, because doctor assemblies double as pressing member, so can reduce the part number.

Again, developing apparatus of the present invention is characterized in that, described framework has: be communicated with, accommodate the resettlement section of developer with described peristome; 2 sidepieces that are positioned at the length direction both ends of described peristome, on the communication direction of described peristome and described resettlement section, along the face relative with described pressing member, extend with described developer carrier; Intersect with the length direction of described peristome and with direction that described communication direction is intersected on, connecting portion from described 2 sidepieces to the length direction of described peristome that extend, be connected between with, described the 1st containment member is configured on the described sidepiece, and described the 2nd containment member is configured on the described connecting portion.

Adopt such structure, has big elasticity owing to be configured in the 1st containment member of sidepiece, so the rotation along with developer carrier even the 1st containment member is subjected to big torque from this developer carrier, also can prevent the connecting airtight property reduction of the 1st containment member and developer carrier reliably.Therefore, can prevent the leakage of developer reliably from the length direction both ends of developer carrier.

Again, developing apparatus of the present invention, it is characterized in that, described the 1st containment member and described the 2nd containment member, the end that adjoins each other disposes on the direction of described compression superimposedly, either party in the end of the end of this overlapped described the 1st containment member and described the 2nd containment member, be formed with to described the 1st containment member and described the 2nd containment member in abutting connection with the outstanding teat of direction.

Adopt such structure, because the either party in the end of the end of the 1st overlapped containment member and the 2nd containment member is formed with teat, so with pressing member with the 1st containment member and the 2nd containment member when its overlapped direction is pushed, because the end that teat is out of shape or does not form teat along the shape that does not form the end of teat is out of shape along the shape of teat, is connected so the 1st containment member is not produced with gap with the 2nd containment member.Therefore, can prevent the leakage of developer reliably from the coupling part of the 1st containment member and the 2nd containment member.

Again, when configuration the 1st containment member and the 2nd containment member, owing to the end of the end that can allow the 1st containment member and the 2nd containment member is overlapping, so can alleviate the time of in the configuration of the 1st containment member and the 2nd containment member, being spent.

Again, developing apparatus of the present invention is characterized in that, described the 2nd containment member is configured between described framework and described the 1st containment member.

Adopt such structure, because the end of the 1st containment member that spring rate is big is configured on the end of the 2nd little containment member of spring rate and utilizes pressing member and framework that they are pushed the ground clamping, so the end of the 2nd little containment member of spring rate is out of shape along the shape of the end of the 1st big containment member of spring rate.Therefore, can prevent from reliably to produce the gap, and can prevent the leakage of developer more reliably from the coupling part of the 1st containment member and the 2nd containment member in the coupling part of the 1st containment member and the 2nd containment member.

Again, developing apparatus of the present invention is characterized in that, at least one side and the surface of contact described framework of described the 1st containment member and described the 2nd containment member and with at least one side of the surface of contact of described pressing member, be formed with recess and protuberance.

Adopt such structure, can will concentrate on protuberance because of the pressing force that pressing member causes, and improve on this protuberance with framework or/and the connecting airtight property of pressing member.Therefore, can improve the sealing between pressing member and framework, can prevent more reliably developer from the peristome of framework pressing member and the leakage the gap of framework.

Again, developing apparatus of the present invention is characterized in that, described recess and described protuberance form on described surface of contact continuously.

Adopt such structure, on the direction that recess and protuberance extend in the long zone, can improve the 1st containment member or/and the 2nd containment member and framework or/and the connecting airtight property of pressing member.Therefore, can prevent more reliably developer from the peristome of framework pressing member and the leakage the gap of framework.

Again, developing apparatus of the present invention is characterized in that, described recess and described protuberance are to extending with the direction that the direction that the inboard of described peristome is connected with the outside is intersected.

Adopt such structure since recess and protuberance in the direction in the inboard of connection opening portion and the outside, promptly extending, so can prevent the leakage of developer more reliably to the direction of intersecting with the leakage direction of developer.

Again, developing apparatus of the present invention, it is characterized in that, have adjacent part with described the 1st containment member and described the 2nd containment member relative and from the inboard configuration relatively of described peristome, be used to the dike member (baffle) that prevents that developer from leaking from described adjacent part.

Adopt such structure, utilize the dike member can prevent that developer from entering to the coupling part of the 1st containment member and the 2nd containment member.Therefore, can prevent the leakage of developer from the coupling part of the 1st containment member and the 2nd containment member.

Again, developing apparatus of the present invention is characterized in that, described developer is by polymerizable monomer is carried out the polymerized toner that polymerization obtained.

Adopt such structure, even use the polymerized toner of good fluidity, also can prevent this polymerized toner from the peristome of framework pressing member and the gap of framework leak.

Again, the detachable handle box of relative imaging device of the present invention is characterized in that having developing apparatus of the present invention.

Adopt such structure and since have can prevent developer from the peristome of framework pressing member and the gap of framework the developing apparatus that leaks, so can prevent the leakage of developer from developing apparatus.

Again, imaging device of the present invention is characterized in that, has developing apparatus of the present invention or handle box.

Adopt such structure and since have can prevent developer from the peristome of framework pressing member and the gap of framework the developing apparatus or the handle box that leak, so can prevent the leakage of developer from developing apparatus or handle box.

Again, developing apparatus of the present invention is characterized in that, has: the framework that peristome is arranged; State after a part that is configured to make the surface on the described peristome is exposed, can be rotated to support on the described framework, the developer carrier of bearing developer in its surface; Make to the length direction of described developer carrier extend lamellar, the side's side end on the direction of intersecting with this length direction the surface of described developer carrier is pushed and to surface at described developer carrier on the bed thickness of the developer that carried limit the scraper of usefulness; The fulcrum arrangement that the opposing party's side end of described scraper is supported along the length direction of described scraper; On the length direction both ends of described scraper, described scraper is separately fixed at the 1st fixed component and the 2nd fixed component on the described fulcrum arrangement; And be arranged on the rib of strengthening usefulness between described at least the 1st fixed component and described the 2nd fixed component, to described scraper.

Adopt such structure, owing to utilize the 1st fixed component and the 2nd fixed component that the length direction both ends of scraper are fixed on the fulcrum arrangement and between the 1st fixed component and the 2nd fixed component rib is set, so can prevent the bending of the distortion of the scraper between the 1st fixed component and the 2nd fixed component or deflection etc.Its result can utilize scraper with uniform power the surface of developer carrier to be pushed, and can carry the thin layer of the developer with uniform thickness on the surface of developer carrier.

Again, developing apparatus of the present invention is characterized in that, described rib is formed described fulcrum arrangement.

Adopt such structure, because with rib double as fulcrum arrangement, so can reduce the part number.

Again, developing apparatus of the present invention, it is characterized in that, described fulcrum arrangement, have the 1st supporting member on a side's who is configured in described scraper the face and be configured in the 2nd supporting member on the opposing party's the face of described scraper, described scraper by described the 1st supporting member and described the 2nd supporting member clamping, and described rib is formed described the 1st supporting member.

Adopt such structure since with the 1st supporting member and the 2nd supporting member with the scraper clamping, so can stably support scraper.Again, because with rib double as the 1st supporting member, so can reduce the part number.

Again, developing apparatus of the present invention is characterized in that, described the 1st supporting member has: the contact site that extends, contacts with the described side's of described scraper face along the length direction of described scraper; With end described developer carrier opposition side, to the portion that extends that the direction of hand-deliver fork described scraper and a described side is extended, the described portion of extending is made to described rib from described contact site.

Adopt such structure, utilize contact site and the portion of extending to give high rigidity to the 1st supporting member.Therefore, contact and utilize the 1st supporting member and the 2nd supporting member to support scraper with scraper, so can prevent the bending of scraper reliably by the contact site that makes the 1st supporting member.Again, because the rib double as is extended portion, so can reduce the part number.

Again, developing apparatus of the present invention, it is characterized in that, the described relatively scraper of described the 1st supporting member is set at the expose side of described developer carrier from described peristome, the described portion that extends is extending to the described side of exposing from the end with described developer carrying side opposition side of described contact site.

Adopt such structure,, extend the interference of portion and developer carrier so can prevent this because the portion of extending is extended from the end of contact site and opposition side developer carrier and from the side of exposing of the peristome of developer carrier.

Again, developing apparatus of the present invention is characterized in that, described the 1st supporting member, have from the described trip end that extends direction that extends portion to extend the handle part that direction that direction intersects is extended.

Adopt such structure, handle part is just controlled and can easily scraper be installed on the framework.

Again, developing apparatus of the present invention, it is characterized in that, described the 1st fixed component and described the 2nd fixed component, connect the length direction both ends of described contact site respectively, the described portion that extends has: with direction that the length direction of described contact site intersects on relative with described the 1st fixed component respectively with described the 2nd fixed component, extending and have 2 end of the 1st width to extend portion on the direction; Being arranged on 2 described ends extends between the portion, has the central authorities of 2nd width bigger than described the 1st width to extend portion on the direction extending.

Adopt such structure, between the 1st fixed component and the 2nd fixed component, utilizing extending direction has the portion of extending of central authorities of big width scraper can be strengthened, and can prevent the bending of the distortion etc. of scraper.On the other hand, relative with the 2nd fixed component with the 1st fixed component respectively end extends portion, because it is less that the width that extends direction is formed, so when utilizing the 1st fixed component and the 2nd fixed component to be fixed on scraper on the fulcrum arrangement, even from the trip end side that extends direction of the portion of extending, also can easily operate to the 1st fixed component and the 2nd fixed component.

Again, developing apparatus of the present invention is characterized in that, described handle part, extend from described central authorities on the length direction of portion at least one square end portion to extend the direction that direction intersects and extend.

Adopt such structure, owing to do not have the portion of extending in the side of handle part, so can easily handle part be controlled from the side.

Again, developing apparatus of the present invention, it is characterized in that, the described portion that extends, direction is extended, notch part on these length direction both ends to extending to have the whole zone from length direction on described contact site and end described developer carrying side opposition side.

Adopt such structure, be provided with breach owing to extend the length direction both ends of portion, so when utilizing the 1st fixed component and the 2nd fixed component to be fixed on scraper on the fulcrum arrangement, even from the trip end side that extends direction of the portion of extending, also can easily operate to the 1st fixed component and the 2nd fixed component.

Again, developing apparatus of the present invention is characterized in that, described the 1st fixed component and the 2nd fixed component have the screw rod that connects described the 1st supporting member, described scraper and described the 2nd supporting member respectively; Be arranged on the axial end of described screw rod, the head of screw of relative configuration with described contact site.

Adopt such structure since form at the width that extends direction of the part relative with the head of screw of the portion of extending less, so even from the trip end side that extends direction of the portion of extending, also can easily operate to head of screw.

Again, developing apparatus of the present invention, it is characterized in that, have length direction both ends in described framework, across described scraper and the configuration of described framework, with the surface at the length direction both ends of described developer carrier carry out swiping, prevent the 1st containment member that developer leaks from the length direction both ends of described developer carrier.

Adopt such structure, utilize the 1st containment member can prevent the leakage of developer from the length direction both ends of developer carrier.Again, because that the width that extends direction on the both ends of the portion of extending forms is less, so when disposing the 1st containment member, can not can intrusively, easily dispose the 1st containment member with the portion of extending.

Again, developing apparatus of the present invention is characterized in that, described the 1st containment member has: be set on the relative position at length direction both ends of the described developer carrier on the described framework, resilient base material; Respectively across the length direction both ends of described scraper and the configuration of described base material, with the swiping member of the surperficial swiping of described developer carrier.

Adopt such structure, because that the width that extends direction on the both ends of the portion of extending forms is less, so when disposing the swiping member, can not can intrusively, easily dispose the swiping member with the portion of extending.

Again, developing apparatus of the present invention is characterized in that, has to be separately positioned on than described the 1st fixed component and the 2nd fixed component more to lean on the length direction outside of described scraper, described scraper is installed in the installation component of using on the described framework.

Adopt such structure, owing to more be provided with installation component by the length direction outside of scraper than the 1st fixed component and the 2nd fixed component, so between the 1st fixed component and the 2nd fixed component, can prevent that the distortion ground of the scraper that causes because of pushing of installation component is installed in scraper on the framework.

Again, developing apparatus of the present invention, it is characterized in that, have on side's side end of described scraper to the length direction extension of described scraper, the pressing body that is pressed into to the surface of described developer carrier, described the 1st fixed component and described the 2nd fixed component, on the length direction of described scraper, be set at the inboard of two ora terminalis of described pressing body.

Adopt such structure, on the length direction of scraper, if the 1st fixed component and the 2nd fixed component are arranged on the inboard of two ora terminalis of pressing body, the part relative with the 2nd fixed component that just can make pressing body with the 1st fixed component reliably with the surperficial butt of developer carrier.Therefore, on the length direction of pressing body, can prevent to produce the difference of the pressing force that pressing force that side's end side pushes the surface of developer carrier and the opposing party's end side push the surface of developer carrier.

Again, the detachable handle box of relative imaging device of the present invention is characterized in that having developing apparatus of the present invention.

Adopt such structure, owing to have the developing apparatus of the bending that can prevent scraper distortion or deflection etc., so can on the surface of developer carrier, carry the thin layer of the developer of uniform thickness, an amount of developer can be supplied with to the surface of the picture supporting body that is had in handle box.

Again, imaging device of the present invention is characterized in that, has developing apparatus of the present invention or handle box.

Adopt such structure, owing to have the developing apparatus of the bending that can prevent scraper distortion or deflection etc., so can on the surface of developer carrier, carry the thin layer of the developer of uniform thickness, an amount of developer can be supplied with to the surface of the picture supporting body that is had in handle box.Its result can form the image that does not have undesirable deep or light high-quality.

Adopt the present invention, use the 1st different containment member of mutual elasticity and the 2nd containment member, can prevent reliably developer from the peristome of framework pressing member and the leakage the gap of framework.

Adopt the present invention, can prevent more reliably developer from the peristome of framework pressing member and the leakage the gap of framework.

Adopt the present invention, can prevent more reliably developer from the peristome of framework pressing member and the leakage the gap of framework.

Adopt the present invention, because doctor assemblies double as pressing member, so can reduce the part number.

Adopt the present invention, can prevent the leakage of developer reliably from the length direction both ends of developer carrier.

Adopt the present invention, the 1st containment member can not produced with gap with the 2nd containment member and be connected, and can prevent the leakage of developer reliably from the coupling part of the 1st containment member and the 2nd containment member.Can alleviate the time of in the configuration of the 1st containment member and the 2nd containment member, being spent again.

Adopt the present invention, can prevent from reliably to produce the gap, and can prevent the leakage of developer more reliably from the coupling part of the 1st containment member and the 2nd containment member in the coupling part of the 1st containment member and the 2nd containment member.

Adopt the present invention, can improve the sealing between pressing member and framework, can prevent more reliably developer from the peristome of framework pressing member and the leakage the gap of framework.

Adopt the present invention, can prevent more reliably developer from the peristome of framework pressing member and the leakage the gap of framework.

Adopt the present invention, can prevent the leakage of developer more reliably.

Adopt the present invention, can prevent the leakage of developer from the coupling part of the 1st containment member and the 2nd containment member.

Adopt the present invention, the polymerized toner that can prevent good fluidity from the peristome of framework pressing member and the gap of framework leak.

Adopt the present invention, can prevent more reliably developer from the peristome of framework on the gap of developer carrier leakage.

Adopt the present invention, can prevent the leakage of developer from developing apparatus.

Adopt the present invention, can prevent the leakage of developer from developing apparatus or handle box.

Adopt the present invention, can prevent the bending of the distortion of scraper or deflection etc.Its result can utilize scraper with uniform power the surface of developer carrier to be pushed, and can carry the thin layer of the developer with uniform thickness on the surface of developer carrier.

Adopt the present invention, can reduce the part number.

Adopt the present invention, can stably support scraper, can reduce the part number again.

Adopt the present invention, can prevent the bending of scraper reliably, can reduce the part number again.

Adopt the present invention, can prevent the interference of portion of extending and developer carrier.

Adopt the present invention, handle part can be controlled and can easily scraper be installed on the framework.

Adopt the present invention, can prevent the bending of the distortion etc. of scraper, and when utilizing the 1st fixed component and the 2nd fixed component to be fixed on scraper on the fulcrum arrangement, even from the trip end side that extends direction of the portion of extending, also can easily operate to the 1st fixed component and the 2nd fixed component.

Adopt the present invention, can easily handle part be controlled from the side.

Adopt the present invention, when utilizing the 1st fixed component and the 2nd fixed component to be fixed on scraper on the fulcrum arrangement, even from the trip end side that extends direction of the portion of extending, also can easily operate to the 1st fixed component and the 2nd fixed component.

Adopt the present invention, even from the trip end side that extends direction of the portion of extending, also can easily operate to head of screw.

Adopt the present invention, utilize the 1st containment member can prevent the leakage of developer from the length direction both ends of developer carrier.Can easily dispose the 1st containment member again.

Adopt the present invention, can easily dispose the swiping member.

Adopt the present invention, between the 1st fixed component and the 2nd fixed component, can prevent the scraper that causes because of pushing of installation component distortion scraper is installed on the framework.

Adopt the present invention, on the length direction of pressing body, can prevent to produce the difference of the pressing force that pressing force that side's end side pushes the surface of developer carrier and the opposing party's end side push the surface of developer carrier.

Adopt the present invention, an amount of developer can be supplied with to the surface of the picture supporting body that is had in handle box.

Adopt the present invention, can form the image that does not have undesirable deep or light high-quality.

For conduct of the present invention achieve the goal further structure, feature, be described in detail below in conjunction with accompanying drawing.

Description of drawings

Fig. 1 is the major part sectional view of expression as an example of the laser printer of imaging device of the present invention;

Fig. 2 is the sectional view of Delevoping cartridge shown in Figure 1;

Fig. 3 is the stereographic map of the framework of Delevoping cartridge shown in Figure 2;

Fig. 4 is the rear view of doctor assemblies shown in Figure 2;

Fig. 5 is the front view of doctor assemblies shown in Figure 2;

Fig. 6 is the vertical view of doctor assemblies shown in Figure 2;

Fig. 7 is the side view of doctor assemblies shown in Figure 2;

Fig. 8 is the rear view of structure at the length direction both ends of expression Delevoping cartridge shown in Figure 2;

Fig. 9 is the sectional view of structure of peristome of the framework of expression Delevoping cartridge shown in Figure 2;

Figure 10 is a rear view of pasting the state after the sealing and side seal behind the scraper on the peristome of framework of expression Delevoping cartridge shown in Figure 2;

Figure 11 is the front view that the paste position of sealing and side seal behind the scraper shown in Figure 10 is described usefulness;

Figure 12 is the sectional view of the state of the peristome before the expression installation doctor assemblies shown in Figure 10;

Figure 13 is the sectional view of another example of the state of the peristome before the expression installation doctor assemblies shown in Figure 10;

Figure 14 is the rear view of another example (upper end of sponge containment member being configured in overlappingly the form on the bottom of the sealing sidepiece that seals behind the scraper) of expression Delevoping cartridge;

Figure 15 is the stereographic map of structure of Width one side's side of expression Delevoping cartridge shown in Figure 14;

Figure 16 is the stereographic map of structure of Width the opposing party side of expression Delevoping cartridge shown in Figure 14;

Figure 17 A and 17B are expression describes usefulness to the sealing behind the scraper shown in Figure 14 and the connection status of sponge containment member stereographic maps;

Figure 18 A and 18B are that expression does not have the unfavorable condition of teat occasion to describe the stereographic map of usefulness to sponge containment member shown in Figure 14;

Figure 19 is the rear view of another example of diagrammatically representing sealing and sponge containment member behind the scraper (sealing forms elongated rectangular plate shape behind the scraper, and has the form of the dike member relative with the coupling part of sealing and sponge containment member behind the scraper);

Figure 20 is the stereographic map that seals behind the scraper shown in Figure 19; And

Figure 21 A and 21B are the stereographic maps that the sealing behind the scraper shown in Figure 19 and the connection status of sponge containment member is described usefulness;

Figure 22 is the rear view of another example (being provided with the form in the hole of location usefulness) of expression doctor assemblies;

Figure 23 is the rear view of another example (being provided with the form of the pin of location usefulness) of the framework of expression Delevoping cartridge;

Figure 24 is the rear view of structure that the length direction both ends of the Delevoping cartridge in the doctor assemblies state shown in Figure 22 have been installed in the framework of Delevoping cartridge shown in Figure 23.

Embodiment

Fig. 1 is the major part sectional view of expression as an example of the laser printer of imaging device of the present invention.In Fig. 1, laser printer 1 in body housing 2, has feeding portion 4 that supplies with printer paper 3 usefulness and the image forming part 5 that the formation image is used on the printer paper of supplying with 3 etc.

On a side sidewall of body housing 2, be formed with processing described later (Japanese: the mounting or dismounting mouth 6 of box 18 mounting or dismounting usefulness プ ロ セ ス), and be provided with front shroud 7 with these mounting or dismounting mouthful 6 switching usefulness.This front shroud 7 rotates to be supported in freely to insert and leads on the not shown cover axle of its bottom.Thus, when with cover axle being center when front shroud 7 is closed, utilize front shroud 7 will install and remove mouthful 6 lockings, when opening for the front shroud 7 of naming a person for a particular job with the cover axle (when toppling over), mounting or dismounting mouthfuls 6, can be installed and removed handle box 18 relative body housings 2 from this mounting or dismounting mouth 6 by open.On front shroud 7, burying not shown guidance panel underground with operating key and LED display part again.

In addition, below, in this laser printer 1, with the side that is provided with front shroud 7 as " front side ", with its opposition side as " rear side ".

Feeding portion 4 has on the bottom in body housing 2: dismantledly the air roll 12 of the sheet feed stacker 8 of An Zhuaning, the paper feed roller 9 of top of leading section that is arranged on sheet feed stacker 8 and paper supply pad 10, the paper pick-up roller 11 that is arranged on the rear side of paper feed roller 9, relative configuration below the front side of paper feed roller 9, be arranged on the numeration (Japanese: roller 13 レ ジ ス ト) of the back side top of paper feed roller 9.

In the inside of sheet feed stacker 8, has the printer paper pressing plate 14 that printer paper 3 mountings can be become layered laminate.This printer paper pressing plate 14, rearward end is by being supported swingably, and leading section direction up and down moves.

At the leading section of sheet feed stacker 8, be provided with the lever 15 that the leading section of printer paper pressing plate 14 is lifted upward usefulness again.This lever 15 forms roughly L font of section from the front side of printer paper pressing plate 14 to downside with entering, and its upper end is installed on the set lever shaft 16 of the leading section of sheet feed stacker 8, and the end with the following leading section butt of printer paper pressing plate 14 thereafter.Thus, center on clockwise rotary driving force when lever shaft 16 is imported in figure, lever 15 is that fulcrum is rotated with lever shaft 16, and the rearward end of lever 15 is lifted the leading section of printer paper pressing plate 14.

When the leading section with printer paper pressing plate 14 lifts, be positioned at the printer paper 3 of the upper on the printer paper pressing plate 14, pushed by paper pick-up roller 11, by the rotation of this paper pick-up roller 11, beginning conveyance between paper feed roller 9 and paper supply pad 10.

On the other hand, when making sheet feed stacker 8 from body housing 2 disengagings, printer paper pressing plate 14 utilizes its deadweight, and leading section moves downwards, becomes along the state of the bottom surface of sheet feed stacker 8.Under this state, can with printer paper 3 layered laminate be positioned on the printer paper pressing plate 14.

The printer paper 3 that utilizes paper pick-up roller 11 to send between paper feed roller 9 and paper supply pad 10 by the rotation of paper feed roller 9, when being held, can carry out paper supply with per 1 paper reliably dividually between paper feed roller 9 and paper supply pad 10.Printer paper 3 behind the paper supply is between paper feed roller 9 and air roll 12, to 13 conveyances of numeration roller.

Numeration roller 13, constitute by mutual relative pair of rolls, after the numeration printer paper 3 is being carried out conveyance to the print position (being the clamped position between photosensitive drums 28 described later and the marking roll 30, is with the position of the painted picture on the photosensitive drums 28 to printer paper 3 printings) of image forming part 5.

Image forming part 5 has: scanner section 17, handle box 18, photographic fixing portion 19 etc.

Scanner section 17 has: be arranged on the top in the body housing 2, not shown LASER Light Source; The polygonal mirror 20 that is driven in rotation; F θ lens 21; Catoptron 22; Lens 23 and catoptron 24 etc.According to from LASER Light Source the laser beam of luminous view data, (translator annotates: what draw among Fig. 1 but is dotted line as dot-and-dash line.) shown in, deflection is also by behind the f θ lens 21 in polygonal mirror 20, utilize catoptron 22 that light path is turned back, again behind the scioptics 23, high-velocity scanning ground shines on the surface of the photosensitive drums described later 28 of handle box 18 by utilizing catoptron 24 further to make light path bending downwards.

Handle box 18 below scanner section 17, is installed on the body housing 2 dismantledly.This handle box 18 has: drum box 25, be installed in the Delevoping cartridge 26 as developing apparatus on the bulging box 25 dismantledly.

Drum box 25, respectively direction is extended forwards, backwards, in the direction of intersecting with this fore-and-aft direction (direction of intersecting with paper among Fig. 1.Below, only be called " Width ".) go up, mutually relatively between the pair of side plates 27 of configuration, in installed in front Delevoping cartridge 26 is arranged, have photosensitive drums 28, grid-control formula corona (Japanese: ス コ ロ ト ロ Application) charger 29, marking roll 30 and cleaning brush 31 at its rear side.

Photosensitive drums 28 has: the formed columnar bulging body 32 of photographic layer that utilizes the positively charged that top layer is made of polycarbonate etc.; The metal drum axle 33 that on the axle center of this drum body 32, along the length direction of drum body 32, extends.Drum axle 33 is not bearing on the biside plate 27 of bulging box 25 revolvably, can be rotated to support on this drum axle 33 by rousing body 32, and photosensitive drums 28 can be that the center can be rotatably set between the biside plate 27 with drum axle 33.

Grid-control formula corona charging device 29, at the rear side oblique upper of photosensitive drums 28, with photosensitive drums 28 discontiguous states, leave that the compartment of terrain is relative to dispose.This grid-control formula corona charging device 29 is the charged charged devices of national judicial examination Lip river holder dragon shape used with the positively charged of tinsel generation corona discharge from tungsten etc., and positive polarity is arranged to equally to have in the surface of photosensitive drums 28.

Marking roll 30, rotation is supported on the biside plate 27 of bulging box 25 freely, relatively contact with photosensitive drums 28 at above-below direction, and be configured to and photosensitive drums 28 between the state of formation clamping.This marking roll 30, the roller 35 that constitutes by the elastomeric material of using by electric conductivity coats metal roll shaft 34 and constitutes.For marking roll 30, when printing, apply the printing bias voltage.

Cleaning brush 31 at the rear of photosensitive drums 28, is disposing with the surperficial state of contact of the bulging body 32 of the front end of brush and photosensitive drums 28.

Delevoping cartridge 26 as shown in Figure 2, has: framework 36; In this framework 36, toner reception room 37, donor rollers 38, as the developer roll 39 of developer carrier with as the doctor assemblies 40 of pressing member.

Framework 36 forms the case shape that has the peristome 41 that is flute profile in rearward end.

Specifically, shown in Fig. 2 and 3, framework 36 has: at mutual relative upper wall 42 and the lower wall 43 of above-below direction; Be arranged to from the Width both sides the pair of sidewalls 44 of closure of openings between these upper walls 42 and the lower wall 43; Be arranged to from the front side the antetheca 79 of closure of openings between upper wall 42 and the lower wall 43.

Upper wall 42 as shown in Figure 2, has the demarcation strip 45 that extends to lower wall 43 near the part of rear side in the fore-and-aft direction way.Utilize this demarcation strip 45, the inner space of framework 36 is separated, the inner space of its front side is divided as toner reception room 37.Again,, be provided with the scraper installation portion 46 that is used to install doctor assemblies 40,, mark off the slit opening portion 41 that Width extends by this scraper installation portion 46, lower wall 43 and pair of sidewalls 44 as connecting portion in the rearward end of upper wall 42.Toner reception room 37 is called communication direction with the direction that peristome 41 is communicated with.That is, in this example, communication direction is consistent with fore-and-aft direction.

Scraper installation portion 46, the side section is the L font.Specifically, scraper installation portion 46 has: 43 relative with lower wall, extend at Width, at fore-and-aft direction installation portion 47 on width tabular arranged; On this leading section of installation portion 47 crooked downwards, extend at Width, width arranged, be formed with and backsight, be the preceding installation portion 48 of clathrate recess at above-below direction.This scraper installation portion 46 was fixed on the upper wall 42 after both can having formed with upper wall 42 splits ground, also can form with upper wall 42.Scraper installation portion 46 if form with upper wall 42, just can reduce the part number of this laser printer 1, can make to simplify the structure.

On preceding installation portion 48, as shown in Figure 3, cut out semicircular breach by following ora terminalis from the length direction both ends, form the recess of avoiding with assembling screw 94 collision usefulness described later 82.Again, on preceding installation portion 48, with each recess 82 relatively on the spaced position of length direction lateral septal, when doctor assemblies 40 is installed in scraper installation portion 46 (preceding installation portion 48) and goes up, form the screw 83 that mounting screw 100 described later is screwed in usefulness.In addition, above the screw 83 of preceding installation portion 48, prevent that by doctor assemblies 40 and bending described later member 58 from engaging, form the location rib 131 and 132 that doctor assemblies 40 relative frameworks 36 is positioned usefulness.Location rib 131 positions relatively with the length direction of peristome 41 to doctor assemblies 40.Location rib 132 positions the above-below direction of doctor assemblies 40 relative peristomes 41.This location rib 131 and 132 when utilizing mounting screw 100 to be installed in doctor assemblies 40 on the scraper installation portion 46, just can prevent the position deviation that produces because of screw is fastening.

The leading section of lower wall 43, as shown in Figure 2, extend and to be connected with antetheca 79 continuums of states skew back top forward.On the rear side of lower wall 43, be formed with axially extended plastic tab configuration portion 121 along developer roll 39 again.In this plastic tab configuration portion 121, dispose the polyethylene terephthalate as material, axially carry out the following plastic tab 122 of swiping along it the samely with the side face of the roller 56 of developer roll 39.Following plastic tab 122 above lower wall 43, by axially carry out swiping with the side face of the roller 56 of developer roll 39 along it the samely, can prevent to leak toner between lower wall 43 and developer roll 39.In addition, below lower wall 43, as shown in Figure 3, a plurality of fins 103 are separated with the compartment of terrain at Width, direction is formed extended at both sides forwards, backwards respectively.The inboard ora terminalis of formed fin 103 on the Width both ends below lower wall 43, double as 102 Width below following seal arrangement portion 96 direction forwards, backwards extends and along the guide part of felt containment member 93 configuration usefulness described later.

Sidewall 44 as shown in Figure 3, has: the supporting board 95 that developer roll 39 is supported usefulness on peristome 41; Sealing 87 sealing sidepiece 88 and dispose the seal arrangement portion 96 as sidepiece of side seal 91 behind the scraper described later.

Supporting board 95 is formed with the dead eye 97 that makes the tabular of direction extension up and down and support roll shaft 55 usefulness of developer roll 39 described later.This dead eye 97 forms: the side is seen and is constituted the state that U font, its rear side end make opening, can accept the roll shaft 55 of developer roll 39 from this opening.

Seal arrangement portion 96, be arranged on to supporting board 95 adjacency the length direction inboard of peristome 41 relatively, the bottom of the axial end portion of the roller 56 of developer roll 39 described later relatively and the laminated spring member 57 of doctor assemblies described later 40 has along the outer peripheral face of this roller 56 and forms forniciform roller opposite face 98.Again, in the above-below direction way of seal arrangement portion 96, the recess 99 of accepting the roll shaft 53 of donor rollers 38 described later forms the state of depression in oblique front side.

As shown in Figure 2, on antetheca 79,, be provided with the handle 49 that is used to control when box 25 is installed and removed in that Delevoping cartridge 26 is roused relatively downwards by from forwards extending with the coupling part of upper wall 42, also turning back again.

In toner reception room 37, contain toner as non magnetic 1 composition of the positively charged of developer as the resettlement section.As this toner, can use styrene monomer with polymerizable monomer, for example styrene etc.; Or acrylic acid, alkane (acrylate of C1～C4), alkane (C1～C4) partially the known polymerization of the outstanding turbid polymerization of propylene class monomer utilization etc. of acrylate etc. by polymerized toner that copolymerization obtained.Such polymerized toner is made glomeration, and flowability is extremely good, can reach the formation images with high image quality.

In addition, in such toner, be combined with the toner of carbon black etc. and paraffin etc., again,, add the adjuvant of silicon dioxide etc. in order to improve flowability.Its particle diameter is about 6～10 μ m degree.

In toner reception room 37, be provided with the stirrer 50 that the toner in this toner reception room is stirred usefulness again.Stirrer 50, central part at toner reception room 37, be supported on axially extended turning axle 51, by with this turning axle 51 as fulcrum, stirrer 50 is rotated, the toners in the toner reception room 37 are stirred and are sidelong out backward from the connected entrance 52 between demarcation strip 45 and the lower wall 43.

Donor rollers 38 is configured in the back skew back below of connected entrance 52, and can be rotated to support between the pair of sidewalls 44 of framework 36.This donor rollers 38 coats by the roller 54 that metal roll shaft 53 usefulness are made of the expanded material of electric conductivity and to constitute.

Developer roll 39 is configured, rotatably is supported at the rear side of donor rollers 38, in broad ways on the peristome 41 between the supporting board 95 of pair of sidewalls 44 of framework 36.Again, developer roll 39 is configured to the state that its surperficial part is rearward exposed highlightedly from the peristome 41 of framework 36, under the state that Delevoping cartridge 26 is installed on the bulging box 25, relatively contacts at fore-and-aft direction with photosensitive drums 28.This developer roll 39 constitutes by coat the roller roller 56 that is made of the conducting rubber material on metal roll shaft 55.The roller 56 of developer roll 39 on the surface by the polyamine fat rubber of the electric conductivity that comprises carbon particulate etc. or the roller layer that silicone rubber constitutes, covers and contains the polyamine fat rubber of fluorine or the coat of silicone rubber.Again, the roller 56 of developer roll 39 is configured to mutual compressed state contiguously with the roller 54 of donor rollers 38.

And, donor rollers 38, as using shown in the arrow, the part that contacts with developer roll 39 is rotated to counter clockwise direction from the top down.Again, developer roll 39, as using shown in the arrow, the part of exposing from framework 36 is rotated to counter clockwise direction from the top down.

Doctor assemblies 40 shown in Fig. 4,5,6 and 7, has: as the laminated spring member 57 of scraper; The bending as the 1st supporting member of fulcrum arrangement of supporting these laminated spring member 57 usefulness prevents member 58 and as the stiffening plate 59 of the 2nd supporting member of fulcrum arrangement; With they mutually fixedly usefulness as the 1st fixed component and the 2nd fixed component 2 assembling screws 94, packing washer 84.Constitute each member of doctor assemblies 40, constitute by metal as hard material.Here employed metal has the hardness higher than sponge containment member described later 92 at least.As described later, this doctor assemblies 40 is preventing under member 58 and the state of stiffening plate 59 with 57 clampings of laminated spring member that with crooked scraper installation portion 46 is installed into stiffening plate 59 and preceding installation portion 48 relative state of contact relatively.

Laminated spring member 57 is made of the thin plate springs material of metal, forms the rectangle that has with the axial roughly the same width of width of the roller 56 of developer roll 39.The upper end of this laminated spring member 57 is bent and prevents that member 58 and stiffening plate 59 clampings from.Again, in the bottom of laminated spring member 57, the rubber component 60 of pushing of the section rectangle that will be made of the silicone rubber of insulativity is being provided with to the length direction of laminated spring member 57 with extending.In addition, push rubber component 60, be not arranged on the length direction both ends of laminated spring member 57, on these both ends, form the state that the upper end of felt containment member 93 described later can be pasted.

In addition, at the length direction both ends of laminated spring member 57,, form the state that connects thickness direction with inserting the logical inserting hole (not shown) of respectively assembling screw 94 in the relative position of fore-and-aft direction and threaded hole described later 80.Each inserting hole on the length direction of laminated spring member 57, is configured in the inboard of two ora terminalis of pushing rubber component 60.Again, on the length direction of laminated spring member 57, in two outsides of each inserting hole, the mounting hole 81 of inserting logical mounting screw 100 usefulness described later forms the state that connects thickness direction.Each mounting hole 81 is formed on the preceding installation portion 48 with scraper installation portion 46 formed each screw 83 in the corresponding position of fore-and-aft direction.

Bending prevents member 58, and the side section makes the L font, to the length direction of laminated spring member 57 extend and with relative configuration the in upper end on the surface of laminated spring member 57.This bending prevents member 58, has integratedly: the tabular contact site 61 of rectangle that contacts with the surface of laminated spring member 57; The portion that extends 62 of the stiffening plate that rearward extends at ora terminalis under the state that doctor assemblies 40 is installed in scraper installation portion 46, from the contact site 61; 2 handle parts 63 that extend downwards from the rearward end (extending the trip end of direction) of the portion of extending 62.In addition, bending prevents member 58, have on the length direction both ends of end thereon, with aforesaid before the location rib 131 and 132 of installation portion 48 groove 141 and the projection 142 that engage.As shown in Figure 8, by location rib 131 is inserted in the groove 141, can carry out the location of doctor assemblies 40 on the length direction of peristome 41.By utilize location rib 132 from above-below direction with projection 142 clampings, can carry out the location of doctor assemblies 40 on the length direction of peristome 41.

Extend portion 62, have: extend portion 64 with the two ends that the 1st width extends from the length direction both ends of the last ora terminalis of contact site 61; Be arranged on that these two ends extend between the portion 64 and extend portion 65 with the central authorities that the 2nd width bigger than the 1st width extends from the length direction central portion of the last ora terminalis of contact site 61.In other words, extend portion 62, rearward extending from the whole zone of length direction of the last ora terminalis of contact site 61 and have notch part 66 at these length direction both ends.

2 handle parts 63, respectively from central authorities extend the length direction both ends of portion 65, central authorities extend portion 65 and down extend to oblique rear relatively, form rectangle in backsight.

In addition, length direction both ends at contact site 61, and, insert the logical inserting hole (not shown) of respectively assembling screw 94 and form the state that connects thickness direction in that to extend portion 64 above-below direction ground relative and on the position relative with threaded hole described later 80 fore-and-aft direction ground with each two ends.Again, on the length direction of contact site 61, in two outsides of each inserting hole, the mounting hole 81 corresponding with each mounting hole 81 of laminated spring member 57 forms the state that connects thickness direction.

Stiffening plate 59 is made of the sheet metal of elongated rectangle, extends and forms between each mounting hole 81 than laminated spring member 57 shorter along the length direction of laminated spring member 57.This stiffening plate 59 clips laminated spring member 57 and prevents that with crooked the contact site 61 of member 58 is relative, and is configured in the position of lower surface on the same plane of above-below direction of its lower surface and contact site 61 at the back side of laminated spring member 57.Again, stiffening plate 59 forms the narrow a little width of width (width of above-below direction) that prevents the contact site 61 of member 58 than bending.And, this stiffening plate 59, and bending prevent between the member 58 upper end of laminated spring member 57 to be supported with clamp position, this laminated spring member 57 is further strengthened.On the length direction both ends of stiffening plate 59, be formed with the threaded hole 80 that each assembling screw 94 is carried out the spiral shell dress again.

Each assembles screw 94, the screw rod 86 that has head of screw 85 integratedly and extend from this head of screw 85.Each assembles screw 94, utilizing crooked preventing under member 58 and the state of stiffening plate 59 with the upper end clamping of laminated spring member 57, each screw rod 86 is prevented member 58 sides, prevents that to bending formed inserting hole (not shown) is inserted logical on the length direction both ends of member 58 and laminated spring member 57 from bending, and make head of screw 85 relative with contact site 61, by carrying out spiral shell dress to formed threaded hole 80 on the both ends of stiffening plate 59, laminated spring member 57 and bending with its clamping are prevented that member 58 and stiffening plate 59 from interfixing.

In addition, only utilize 2 assembling screws 94 that laminated spring member 57, bending are prevented that member 58 and stiffening plate 59 from interfixing.

Packing washer 84 is made of elastomeric material, and it is tabular to form the annulus of the screw rod 86 that can insert logical assembling screw 94.In the assembling that utilizes above-mentioned assembling screw 94, the screw rod 86 that will assemble screw 94 in sealing packing ring 84, insert logical after, prevent in member 58, laminated spring member 57 and the stiffening plate 59 by this screw rod 86 is inserted to lead in bending, packing washer 84 can be installed in the head of screw 85 and crooked the preventing between the contact site 61 of member 58 of assembling screw 94.By clamping sealing packing ring 84, sealing between the contact site 61 that the head of screw 85 and the bending of assembling screw 94 can be prevented member 58 can prevent to the situation of the toner that enters between screw rod 86 and the threaded hole 80 from leaking between head of screw 85 and the contact site 61.

And, doctor assemblies 40, as shown in Figure 2, relative scraper installation portion 46, it is relative with last installation portion 47 to make bending prevent that the portion that extends 62 of member 58 is separated with the compartment of terrain, and is installed into stiffening plate 59 and preceding installation portion 48 relative state of contact.

In the installation of this doctor assemblies 40, as shown in Figure 8, to insert as the mounting screw 100 of installation component and lead in each mounting hole 81 of contact site 61 and laminated spring member 57, by these mounting screw 100 spiral shells are contained in the screw 83 of scraper installation portion 46, doctor assemblies 40 can be fixed on the scraper installation portion 46.

In addition, as shown in Figure 4 and Figure 5, in each mounting hole 81 of contact site 61 and laminated spring member 57, one side's mounting hole 81, form the corresponding circular hole of external diameter with the screw rod of mounting screw 100, the opposing party's mounting hole 81 forms slotted hole long slightly on the length direction of laminated spring member 57 and stiffening plate 59.Form slotted hole by mounting hole 81, can have tolerance, can easily doctor assemblies 40 be installed on the scraper installation portion 46 for the formation position of the mounting hole on the length direction 81 with a side.

Again, at doctor assemblies 40 in the installation of scraper installation portion 46, because before the leading section of the screw rod 86 of the outstanding assembling screw 94 of stiffening plate 59 enters the recess 82 of installation portion 48, so can avoid the leading section of this screw rod 86 and conflicting of preceding installation portion 48.Therefore, stiffening plate 59 is seamlessly contacted with preceding installation portion 48.

In addition, in the installation of doctor assemblies 40, handle part 63 is controlled from notch part 66, owing to can make the position alignment of doctor assemblies 40 and scraper installation portion 46, so can easily doctor assemblies 40 be installed on the scraper installation portion 46.

Again, under doctor assemblies 40 was installed in state on the scraper installation portion 46, bending prevented member 58, and laminated spring member 57 is configured in developer roll 39 and exposes side (rear side) from what peristome 41 exposed relatively, extends the state that portion 62 is configured to rearward extend.

And, the toner that utilizes the rotation of stirrer 50 to emit to the inner space of the rear side of framework 36 from connected entrance 52 by the rotation of donor rollers 38, is supplied with on the roller 56 of developer roll 39, at this moment, between the roller 56 of the roller 54 of donor rollers 38 and developer roll 39, have positive triboelectricity.The toner of on the roller 56 of developer roll 39, supplying with, rotation along with developer roll 39, enter between the roller 56 of pushing rubber component 60 and developer roll 39 of doctor assemblies 40, here, also produce frictional electrification and become certain thickness thin layer and be carried on the roller 56 of developer roll 39.

In addition, in this Delevoping cartridge 26, the interval D 1 of the vertical between the uppermost position in fig-ure of the following ora terminalis of laminated spring member 57 and the roller 54 of donor rollers 38, below 2mm, owing to have such interval D 1, so between the roller 56 of the roller 54 of donor rollers 38 and developer roll 39, charged toner promptly can be carried to the position of pushing rubber component 60, can not wished the highly charged of toner.Again, the interval D 2 of the vertical between the uppermost position in fig-ure of the roller 54 of the following ora terminalis of stiffening plate 59 (bending prevents the contact site 61 of member 58) and donor rollers 38, more than 15mm,, the toner in the toner reception room 37 successfully can be supplied with to developer roll 39 sides owing to have such interval D 2.

On the other hand, the surface of photosensitive drums 28, as shown in Figure 1, after utilizing the charged device 29 the same ground positively chargeds of national judicial examination Lip river holder dragon shape, exposure is carried out in the high-velocity scanning that is used to the laser beam of self-scanning portion 17, forms the electrostatic latent image according to view data.

Then, utilize developer roll 39 rotation, be carried on the developer roll 39 and the toner that becomes positively charged, when relatively contacting with photosensitive drums 28, supply with to formed electrostatic latent image on the surface of photosensitive drums 28, that is, and in the surface of the photosensitive drums 28 of the same ground positively charged, exposure after current potential descends is partly supplied with, but videoization thus, utilizes flop phenomenon to form painted picture by carrying selectively.

Then, photosensitive drums 28 and marking roll 30, to between them and be rotated driving, by printer paper is carried out conveyance between photosensitive drums 28 and marking roll 30, the lip-deep painted picture that can will be carried on photosensitive drums 28 is printed on the printer paper 3 with printer paper 3 clamping conveyances.

In addition, after printing,,, when the brush of the surface of this photosensitive drums 28 and cleaning brush 31 is relative, removed by this brush along with the rotation of photosensitive drums 28 because of contact lip-deep paper powder with printer paper 3 attached to photosensitive drums 28.

Photographic fixing portion 19 is arranged on the rear side of handle box 18, has: photographic fixing framework 67; Warm-up mill 68 in this photographic fixing framework 67 reaches presses pressure roller 69.

Warm-up mill 68 has the metal pipe and to the Halogen lamp LED of heating usefulness in this metal pipe, and is used to be driven in rotation from the input of the power of not shown motor.

Press pressure roller 69, below warm-up mill 68, be configured to the state that warm-up mill 68 is pushed relatively.Should press pressure roller 69, constitute by using the roller that constitutes by elastomeric material that metal roll shaft is coated, driven along with the rotation driving of warm-up mill 68.

In photographic fixing portion 19, will carry out hot photographic fixing by warm-up mill 68 and during between the pressure roller 69 to printer paper 3 at the toner of being printed on the printer paper 3.Printer paper 3 after the toner photographic fixing, above body housing 2 and up and down direction row's paper passage 70 conveyances of extending.Printer paper 3 to 70 conveyances of row's paper passage utilizes the exit roller 71 that is located at its upper end, to arrange paper on formed row's paper disc 72 on body housing 2.

Again, in this Delevoping cartridge 26, as shown in Figure 9, the laminated spring member 57 of doctor assemblies 40 and crooked prevent member 58, with the seal arrangement portion 96 of the preceding installation portion 48 of scraper installation portion 46 and each sidewall 44 between, clamping has and will seal 87 behind laminated spring member 57 and the crooked scraper as the 2nd containment member that prevents to seal between member 58 and preceding installation portion 48 and the seal arrangement portion 96 usefulness.

Seal 87 behind the scraper, constitute, as shown in figure 10, have integratedly: the sealing sidepiece 88 on top of roller opposite face 98 that is configured in the seal arrangement portion 96 of each sidewall 44 by the sponge material of polyamine fat vacuole end plastics etc.; Along the portion that is tightly connected 89 that the last ora terminalis of the preceding installation portion 48 of scraper installation portion 46 extends and two sealing sidepieces 88 are connected.And, under the state that doctor assemblies 40 is installed on the scraper installation portion 46, as shown in figure 11, seal 87 behind the scraper, sealing sidepiece 88 is contacted with the rear side of laminated spring member 57, make the portion of being tightly connected 89 prevent that with bending the rear side of member 58 from contacting at the upside of stiffening plate 59.Therefore, sealing 87 behind the scraper can be sandwiched between the seal arrangement portion 96 of stiffening plate 59 and preceding installation portion 48 and two side 44, doctor assemblies 40 can be installed on the scraper installation portion 46.

Again, seal 87 behind the scraper, under the state before being installed in doctor assemblies 40 on the scraper installation portion 46, have the bigger thickness of thickness of fore-and-aft direction than stiffening plate 59 (direction of intersecting with laminated spring member 57).And, when doctor assemblies 40 is installed on the scraper installation portion 46, seal 87 behind the scraper, utilize laminated spring member 57 and the crooked member 58 that prevents to push to the preceding installation portion 48 of scraper installation portion 46 and the seal arrangement portion 96 of two side 44, and on laminated spring member 57 and the crooked relative direction that prevents member 58 and preceding installation portion 48 and seal arrangement portion 96, be compressed, respectively laminated spring member 57, bending are prevented that member 58, preceding installation portion 48 and seal arrangement portion 96 from flexibly pushing.

After being provided with this scraper, seal 87, and utilize and respectively to seal sidepiece 88 and can seal between the length direction both ends with laminated spring member 57 and preceding installation portion 48, and the utilization portion 89 that is tightly connected prevents from bending from sealing between member 58 and the preceding installation portion 48.Therefore, can stop the toner that enters to the back side of laminated spring member 57, cross over the upper end of laminated spring member 57 from this back side and prevent on the member 58 around going into, can prevent from reliably between the last installation portion 47 of scraper installation portion 46 and doctor assemblies 40, to spill to bending.

In addition,, utilize double sticky tape, sealing 87 behind the scraper is sticked in scraper installation portion 46 and the seal arrangement portion 96 doctor assemblies 40 being installed in before the scraper installation portion 46.For example, after sealing 87 is pasted behind the scraper with 1 of double sticky tape,, sealing 87 behind the scraper can be sticked in scraper installation portion 46 and the seal arrangement portion 96 by the another side of double sticky tape is pasted to scraper installation portion 46 and seal arrangement portion 96.At this moment, if use, because such double sticky tape body bone is strong, so, also can prevent to seal 87 distortion (elongation) behind the scraper even be applied to behind the scraper in the sealing 87 with bigger power with the double sticky tape of polyethylene terephthalate as base material.Therefore, seal 87 after pasting scraper more accurately.

Again, in this Delevoping cartridge 26, as shown in Figures 9 and 10, in the bottom of the roller opposite face 98 of the seal arrangement portion 96 of each sidewall 44, dispose prevent from the leakage usefulness of the toner at the axial both ends of developer roll 39, as the side seal 91 of the 1st containment member.

Side seal 91 on the axial both ends of the roller 56 of developer roll 39, is configured to the state with the surperficial swiping of this roller 56.This side seal 91 has: as the sponge containment member 92 of base material; On this sponge containment member 92 stacked felt containment member 93 as the swiping member.

Sponge containment member 92, sponge material by polyamine fat vacuole end plastics etc. constitutes, more particularly, by the sponge material (trade name: slope dragon (Japanese: Port ロ Application) of rigidity in sponge material than higher form of sponge, Japan ロ ジ ヤ one ス イ ノ ア Star Network corporate system) constitutes, have the big spring rate (for example the occasion after compression 25% shows the pressure of 12000Pa) of spring rate (pressure of for example representing 2000Pa) in the occasion after the compression 25% than sealing 87 behind the scraper.Again, sponge containment member 92, as shown in figure 12, under the state that doctor assemblies 40 is installed in before the scraper installation portion 46, with the relative direction of the roller 56 of this developer roll 39 on thickness, form thickness (for example 4mm) less (for example 3mm) than sealing 87 behind the scraper.

Figure 13 is the sectional view of another example of expression state that the peristome before the doctor assemblies is installed.As shown in figure 13, sponge containment member 92 under the state before being installed in doctor assemblies 40 on the scraper installation portion 46, with the thickness on the relative direction of the roller 56 of this developer roll 39, forms with the thickness of sealing 87 behind the scraper and equates.The structure of other parts is same with form shown in Figure 12, puts on the reference marks identical with Figure 12 and omits explanation for the structural elements of correspondence.

And, this sponge containment member 92, on the roller opposite face 98 of seal arrangement portion 96, sense of rotation direction extension up and down along developer roll 39, and be connected to the state of the lower surface adjacency of the sealing sidepiece 88 of sealing 87 behind the upper surface in its sense of rotation downstream and the scraper, and the rear end face 101 of the lower surface that is configured to the sense of rotation upstream side and seal arrangement portion 96 becomes on fore-and-aft direction with state simultaneously.Again, the upper end of sponge containment member 92, the sealing sidepiece 88 of sealing 87 is configured between laminated spring member 57 and the seal arrangement portion 96, and by their clampings behind scraper.In addition, sponge containment member 92, same with sealing 87 behind the scraper, utilize double sticky tape, be secured on the roller opposite face 98 of seal arrangement portion 96.

Felt containment member 93, the felt that is made of the fiber of polyester makes, and forms identical width with the width of sponge containment member 92 on Width.Again, felt containment member 93, with the relative direction of developer roll 39 on thickness form more less than the thickness of sponge containment member 92.

And, this felt containment member 93, the upper end in the sense of rotation downstream of its developer roll 39 is on the bottom and sponge containment member 92 of laminated spring member 57, and coastal careful envelope member 92 extends, also pass through the rear end face 101 of seal arrangement portion 96, be configured to below seal arrangement portion 96 102 around the state of going into.The face that roller felt containment member 93 and developer roll 39 56 is relative is made to the slickenside with this roller 56 swipings.In addition, felt containment member 93,87 same with sealing behind the scraper, 102 is pasting below seal arrangement portion 96 through sponge containment member 92 bottom that utilizes double sticky tape slave plate spring member 57.

When assembling Delevoping cartridge 26, sealing 87 is closely connected after in scraper installation portion 46 and the seal arrangement portion 96 after with scraper, with the rear end face 101 of seal arrangement portion 96 as benchmark, sponge containment member 92, lower surface position alignment at the sense of rotation upstream side that makes the developer roll 39 on this rear end face 101 and the sponge containment member 92 on the fore-and-aft direction becomes with state simultaneously, and is secured on the roller opposite face 98 of seal arrangement portion 96.And, after the configuration of this sponge containment member 92, doctor assemblies 40 is installed on the scraper installation portion 46.At this moment, the upper end that utilizes the bending of doctor assemblies 40 to prevent member 58, with sealing 87 the portion that is tightly connected 89 behind the scraper forward installation portion 48 push, again, utilize the length direction both ends of laminated spring member 57, the upper end of sponge containment member 92 is sealed 87 sealing sidepiece 88 and push behind scraper to seal arrangement portion 96.Then, felt containment member 93, the bottom of slave plate spring member 57, through sponge containment member 92 below seal arrangement portion 96 102 be stuck after, be housed in by both ends in the dead eye 97 of each supporting board 95 of two side 44, and developer roll 39 be bearing between the supporting board 95 of two side 44 roll shaft 55 of developer roll 39.At this moment, to the bottom, by felt containment member 93, push to seal arrangement portion 96 at the axial both ends that are developed the roller 56 of roller 39 from the central portion of sponge containment member 92.Its result, sponge containment member 92, with the relative direction of the roller 56 of this developer roll 39 on thickness, be made to identical with the thickness of sealing sidepiece 88 of sealing 87 behind the scraper.

Promptly, doctor assemblies 40 is installed on the scraper installation portion 46, when developer roll 39 being bearing between two supporting boards 95, by having the sponge containment member 92 of big relatively spring rate, be compressed with relatively little decrement, seal 87 after having the scraper of relatively little spring rate, be compressed with big relatively decrement, thus with the relative direction of the roller 56 of developer roll 39 on, can be with the thickness of sponge containment member 92 and scraper after the thickness of sealing sidepiece 88 of sealing 87 make identical.

Therefore, if respectively the spring rate of sealing 87 behind the spring rate of sponge containment member 92, the scraper, their decrement are set for the spring rate that makes sponge containment member 92 and the decrement of sponge containment member 92 multiply each other gained value, with scraper after seal the multiply each other value of gained of 87 decrement behind spring rate and the scraper of sealing 87 and become consistent state, just can make power that 92 pairs of doctor assemblies 40 of sponge containment member and seal arrangement portion 96 push, with scraper after seal the power that 87 pairs of doctor assemblies 40 and seal arrangement portion 96 push and equate mutually.Therefore, seal 87 after using different sponge containment member 92 of mutual elasticity and scraper, can prevent from reliably to leak in the gap of the doctor assemblies 40 of toner from the peristome 41 of framework 36 and framework 36.Therefore, as developer, even use the polymerized toner of good fluidity, also can prevent this polymerized toner from the peristome 41 of framework 36 the gap of developer roll 39 in leak.

Again, owing to seal 87 sealing sidepiece 88 behind sponge containment member 92 and the scraper identical thickness is arranged, so can prevent to produce step between the sealing sidepiece 88 of sealing 87 behind sponge containment member 92 and the scraper, and can prevent between sponge containment member 92 and laminated spring member 57, to produce the gap owing to such step.Therefore, can prevent more reliably toner from the peristome 41 of framework 36 the gap of developer roll 39 in leak.

When the rigidity of sealing 87 doctor assemblies of pushing 40 is low after with sponge containment member 92 and scraper,, between this doctor assemblies 40 and sponge containment member 92, might produce the gap because of reacting force from the big sponge containment member 92 of spring rate again.But, because doctor assemblies 40 constitutes, has the rigidity higher than sponge containment member 92 by metal, so can not only prevent between doctor assemblies 40 and sponge containment member 92, to produce the situation in gap because of reacting force from sponge containment member 92, and, can utilize behind reliably that spring rate is the little scraper of doctor assemblies 40 sealing 87 to push.Therefore, can prevent from more reliably to leak in the gap of the doctor assemblies 40 of toner from the peristome 41 of framework 36 and framework 36.

And, since doctor assemblies 40 double as with sponge containment member 92 and scraper after the sealing 87 pressing members of pushing, so can reduce the part number of Delevoping cartridge 26.

In addition, be configured in the sponge containment member 92 in the seal arrangement portion 96, owing to have big elasticity, even the former big torque that causes because of the rotation of developer roll 39 acts on the sponge containment member 92 by felt containment member 93, also can prevent the connecting airtight property reduction of felt containment member 93 and developer roll 39.Therefore, can prevent the leakage of toner reliably from the axial both ends of developer roll 39.

Again, handle box 18, owing to have the Delevoping cartridge 26 that leaks in the gap that can prevent the doctor assemblies 40 of toner from the peristome 41 of framework 36 and framework 36, so can prevent the leakage of toner from Delevoping cartridge 26.And, in laser printer 1, also can prevent the leakage of toner from Delevoping cartridge 26 or handle box 18 with such handle box 18.

Figure 14 is the rear view of another example of expression Delevoping cartridge 26.In addition,, in Figure 14, put on identical reference marks for the part corresponding with each part mentioned above, and in its explanation of following omission.

In Delevoping cartridge shown in Figure 14 26, under the state that doctor assemblies 40 is installed in before the scraper installation portion 46, the bottoms of the upper end of each sponge containment member 92 two sealing sidepieces 88 of sealing 87 behind fore-and-aft direction (will seal the direction of sidepiece 88 and 92 compressions of sponge containment member) and scraper are being disposed overlappingly.And, shown in Figure 15 and 16,, be formed with outstanding 2 the tabular teats 114 of triangle in bottom to each sealing sidepiece 88 (sponge containment member 92 with sealing sidepiece 88 in abutting connection with direction) respectively in the upper end of each sponge containment member 92.

When this Delevoping cartridge 26 of assembling, after sealing 87 sticks on scraper installation portion 46 and seal arrangement portion 96 after with scraper, shown in Figure 17 A, the rear end face 101 that sponge containment member 92 position alignment is become seal arrangement portion 96 and the lower surface of the developer roll 39 sense of rotation upstream sides of sponge containment member 92 become the state with one side on fore-and-aft direction, and paste go up at the roller opposite face 98 (with reference to Fig. 9) of seal arrangement portion 96 extend, the overlapping state in bottom of the sealing sidepiece 88 of sealing 87 behind teat 114 and the scraper.And, after the configuration of this sponge containment member 92, (with reference to Fig. 9) is installed on the scraper installation portion 46 with doctor assemblies 40, utilizes the length direction both ends of the laminated spring member 57 of doctor assemblies 40, the teat 114 of sponge containment member 92 sealed 87 sealing sidepiece 88 and push behind scraper.

Like this, the upper end of the sponge containment member 92 that the configuration spring rate is big on the bottom of the little sealing sidepiece 88 of spring rate, by utilizing laminated spring member 57 and seal arrangement portion 96 they are pushed the ground clamping, shown in Figure 17 B, the bottom of the little sealing sidepiece 88 of spring rate is out of shape along the shape of the teat 114 of the upper end of the big sponge containment member 92 of spring rate.Therefore, can prevent to prevent that in the generation gap, coupling part of sealing sidepiece 88 toner is from the leakage of sealing sidepiece 88 with the coupling part of sponge containment member 92 with sponge containment member 92.

Especially, because teat 114 is formed on the sponge containment member 92, so when with laminated spring member 57 sponge containment member 92 being sealed 87 sealing sidepiece 88 and pushes behind scraper, the bottom of sealing sidepiece 88 is out of shape along the shape of teat 114.Therefore, can prevent reliably in the situation of sponge containment member 92 with the generation gap, coupling part of sealing sidepiece 88.Its result can prevent reliably that toner is from the leakage of sponge containment member 92 with the coupling part of sealing sidepiece 88.

Promptly, shown in Figure 18 A, do not form the occasion of teat 114 in the upper end of sponge containment member 92, with configuration overlappingly on the bottom of the upper end of sponge containment member 92 and sealing sidepiece 88, when utilizing laminated spring member 57 that they are pushed, shown in Figure 18 B, might be in the coupling part generation gap of sealing sidepiece 88 with sponge containment member 92.In contrast, if the upper end at sponge containment member 92 forms teat 114, then when sponge containment member 92 being sealed 87 sealing sidepiece 88 and pushes behind scraper with laminated spring member 57, the bottom of sealing sidepiece 88 is out of shape along the shape of teat 114, can prevent to produce the situation in gap such shown in Figure 18 B.

In addition, when configuration sponge containment member 92,, can alleviate the time that configuration sponge containment member 92 is spent owing to can allow that the upper end of sponge containment member 92 is overlapping with the bottom of sealing sidepiece 88.

In addition, in this example, the upper end that on the bottom of the sealing sidepiece 88 of sealing 87 behind the scraper, has disposed sponge containment member 92, but also can paste sponge containment member 92 earlier, seal 87 after then pasting scraper, and dispose the bottom of the little sealing sidepiece 88 of spring rate in the upper end of the big sponge containment member 92 of spring rate.This occasion, by the end of sponge containment member 92 and sealing sidepiece 88 is pushed from the little sealing sidepiece 88 lateral seal configuration portions 96 of spring rate, the shape of the teat 114 of the upper end of the coastal careful envelope member 92 in bottom of sealing sidepiece 88 easily can be out of shape.

Again, form 2 teats 114 in the upper end of sponge containment member 92, but also can only form 1 teat 114, the teat more than 3 114 can also be formed on the upper end of sponge containment member 92.In addition, also such teat 114 can be formed on the bottom of sealing sidepiece 88.

Figure 19 is a rear view of diagrammatically representing the example of sealing 87 and sponge containment member 92 behind the scraper.In addition,, in Figure 19, put on identical reference marks for the part corresponding with each part mentioned above, and in its explanation of following omission.

Seal 87 behind the scraper shown in Figure 19, constitute, form elongated rectangular plate shape, and extending along last ora terminalis as the preceding installation portion 48 of the scraper installation portion 46 of connecting portion by the sponge material of polyamine fat vacuole end plastics etc.As shown in figure 20, on sealing 87 the back side (with the surface of contact of laminated spring member 57) behind the scraper, the recess 115 of the wire of extending along its length and protuberance 116 are separated with the compartment of terrain at the above-below direction that intersects with its length direction are alternately disposing again.

On the other hand, under the state that doctor assemblies 40 is installed in before the scraper installation portion 46, sponge containment member 92, on roller opposite face 98 (with reference to Fig. 9) as the seal arrangement portion 96 of sidepiece, sense of rotation along developer roll 39 is extended on direction ground up and down, the upper end in its sense of rotation downstream, shown in Figure 21 A, with the Width both ends and the state between the preceding installation portion 48 that enter sealing 87 behind the scraper, disposing overlappingly at fore-and-aft direction (direction that sealing 87 and sponge containment member 92 compress after with scraper) with the Width both ends of sealing 87 behind the scraper.In addition, the bottom at the Width both ends of sealing 87 is overlapping behind the upper end of sponge containment member 92 and the scraper, and expose from the upper end of sponge containment member 92 on the top at the Width both ends of sealing 87 behind the scraper.

Again, as shown in figure 19, on the preceding installation portion 48 of scraper installation portion 46, for the coupling part of sealing 87 behind the scraper with each sponge containment member 92, from the inboard configuration relatively of peristome 41, and be provided with and prevent that toner from leaking the dike member 117 of the L font of usefulness from this coupling part.More particularly, this dike member 117 has: the past installation portion 48 side dike parts 118 rearward outstanding, that coastal careful envelope member 92 extends; In the past installation portion 48 rearward outstanding, intersects with side dike part 118 and seals the last dyke 119 of 87 direction extension behind the scraper.

Sealing 87 and sponge containment member 92 behind the scraper, after being configured to state as described above, when being installed in doctor assemblies 40 on the scraper installation portion 46, utilize doctor assemblies 40 respectively forward the roller opposite face 98 of installation portion 48 and seal arrangement portion 96 push.Thus, shown in Figure 21 B, the Width both ends of sealing 87 behind the little scraper of spring rate are out of shape along the shape of the upper end of the big sponge containment member 92 of spring rate, and sealing 87 parts that are connected with each sponge containment member 92 can not produce with gap and connect behind scraper.Therefore, can prevent the leakage of toner sealing 87 and coupling part of each sponge containment member 92 behind the scraper.

In addition, utilize dike member 117 can prevent that toner from entering the coupling part of sealing 87 and each sponge containment member 92 behind the scraper.Therefore, can prevent the leakage of toner sealing 87 and coupling part of each sponge containment member 92 behind the scraper more reliably.

Again, owing to be formed with recess 115 and protuberance 116 on 87 and the face that laminated spring member 57 contacts of sealing behind the scraper, so when utilizing laminated spring member 57 to push, concentrate to protuberance 116 by the pressing force that this laminated spring member 57 causes, on this protuberance 116, can make the connecting airtight property raising of sealing 87 behind laminated spring member 57 and the scraper.Therefore, can improve the sealing between the sealing 87 behind laminated spring member 57 and the scraper, can prevent more reliably toner from peristome 41 the gap of developer roll 39 in leak.

In addition owing on surface of contact, form recess 115 and protuberance 116 continuously, so can be in the long zone of its length direction, improve scraper after the connecting airtight property of sealing 87 and doctor assemblies 40.Therefore, can prevent more reliably toner from peristome 41 the gap of developer roll 39 in leak.

In addition, because recess 115 and protuberance 116 be to extending with the length direction of peristome 41, the direction of promptly intersecting to the direction of leaking from the upper end of peristome 41 with toner, thus can prevent more reliably toner from peristome 41 doctor assemblies 40 and the gap of framework 36 in leak.

In addition, forming recess 115 and protuberance 116 on 87 and the face that laminated spring member 57 contacts of sealing behind the scraper, but also can be 87 with sealing after protuberance 116 is formed on scraper with recess 115 with face that preceding installation portion 48 scraper installation portion 46 contact on, can also be formed on sealing 87 behind the scraper, and the surface of contact of doctor assemblies 40 and with the both sides of the surface of contact of preceding installation portion 48.Again, also recess 115 and protuberance 116 can be formed on sponge containment member 92, with the surface of contact of doctor assemblies 40 and with a side or the both sides of the surface of contact of seal arrangement portion 96.In the occasion that recess 115 and protuberance 116 is formed on the sponge containment member 92, the direction of intersecting along length direction (that is the direction of intersecting with the direction of toner leakage) formation continuously with peristome 41.

Again, prevent that toner sealing 87 behind the scraper from leaking the dike member of usefulness with the coupling part of sponge containment member 92, also can be arranged in the Delevoping cartridge 26 of structure shown in Figure 10.This occasion, the dike member for the coupling part that respectively seals sidepiece 88 and each sponge containment member 92 of sealing 87 behind the scraper, forms inboard relative, tabular along the sense of rotation extension of developer roll 39 with peristome 41.

In this example, have the doctor assemblies 40 of above such structure, at its length direction both ends, with laminated spring member 57 utilize assembling screws 94 relatively bending prevent that member 58 and stiffening plate 59 from fixing.And, bending prevents member 58, extend portion 65 owing to have the central authorities that the length direction central portion of ora terminalis rearward extends from the contact site 61 between the screw 94, can assemble between the screw 94 at 2 laminated spring member 57 is strengthened so utilize these central authorities to extend portion 65 2 assemblings.Therefore, can prevent the distortion or the deflection of laminated spring member 57.Its result utilizes and pushes rubber component 60, can push the surface of the roller 56 of developer roll 39 with uniform power, can carry the thin layer of the toner with uniform thickness on the surface of roller 56.And, because the central authorities that form with contact site 61 extend the rib that portion's 65 double as are strengthened laminated spring member 57, so can reduce the part number of Delevoping cartridge 26.

Again, have contact site 61 integratedly and extend portion 62 because bending prevents member 58, so can prevent that member 58 from giving high rigidity to bending, make this bending prevent that the contact site 61 of member 58 from contacting with laminated spring member 57, by the upper end of laminated spring member 57 is supported, can prevent the bending of laminated spring member 57 reliably.

In addition,, can prevent the bending of the distortion of laminated spring member 57 or deflection etc., can stably support again laminated spring member 57 by preventing that with crooked member 58 and stiffening plate 59 from carrying out clamping with the upper end of laminated spring member 57.

Again, be configured to the state that relative laminated spring member 57 rearward extends from the upper end of contact site 61, so can prevent the interference of portion of extending 62 and developer roll 39 owing to will extend portion 62 (central authorities extend portion 65).

In addition, bending prevents member 58, owing to have handle part 63, this handle part 63 can be controlled, also easily doctor assemblies 40 is installed on the scraper installation portion 46.And, in the outer side of handle part 63, owing to form notch part 66 and do not have the portion of extending 62, so when being installed in doctor assemblies 40 on the scraper installation portion 46, can handle part 63 be controlled from outer side.

Again, extend portion 62 with each assembling screw 94 in the relative part of above-below direction, promptly extend on the length direction both ends of portion 62, owing to be formed with notch part 66, even die from the trip end side of the portion of extending 62, also can easily each assembling screw 94 be prevented that to bending each inserting hole of the contact site 61 of member 58 from inserting, can easily operate with the instrument of screwdriver etc. the head of screw 85 of each assembling screw 94 again.

In addition, by being provided with side seal 91, can prevent the leakage of toner from the axial both ends of developer roll 39.And, owing to the slickenside with roller 56 swipings developer roll 39 side seal 91 is made of felt, thus the roller 56 of developer roll 39 and the sliding resistance of side seal 91 can not only be reduced, and can prevent the leakage of toner reliably from the axial both ends of developer roll 39.

Owing to form notch part 66, when pasting felt containment member 93, can not can easily dispose felt containment member 93 intrusively with the portion of extending 62 at the length direction both ends of the portion of extending 62 again.

In addition, doctor assemblies 40, in the length direction outside from 2 assembling screws 94, owing to utilize mounting screw 100 to be installed on the scraper installation portion 46, so between 2 assembling screws 94, can prevent the laminated spring member 57 that causes because of pushing of mounting screw 100 distortion, doctor assemblies 40 can also be installed on the framework 36.

In addition, on the length direction of laminated spring member 57, owing to be provided with in the inboard of two ora terminalis of pushing rubber component 60 and respectively assemble screw 94, thus can make reliably push rubber component 60 assemble the surperficial butt of the roller 56 of the relative relative developer roll 39 of part of screw 94 with each.Therefore, on the length direction of pushing rubber component 60, can prevent that the pressing force that pushes on the surface of the pressing force that pushes on the surface of side's end side pair roller 56 and the opposing party's end side pair roller 56 from producing the situation of difference.Its result, will having more, the thin layer of the toner of homogeneous thickness is carried on the roller 56.

Again, handle box 18, owing to have the Delevoping cartridge 26 of the bending of the distortion that can prevent laminated spring member 57 or deflection etc., be carried on the surface of roller 56 of developer roll 39 so can will have the thin layer of the toner of uniform thickness, can be with an amount of toner to the supply of the surface of photosensitive drums 28.And, in laser printer 1, can form the image that does not have undesirable deep or light high-quality with such handle box 18.

In addition, in this example, utilize location rib 131,132 and groove 141, projection 142 to carry out the location of doctor assemblies 40 relative frameworks 36, but also can be shown in Figure 22～24, utilize pin 161 and hole 151 carry out, to replace location rib 131,132 and groove 141, projection 142.Promptly, on the preceding installation portion 48 of framework 36, with expose the length direction two ends that direction outstanding columned pin 161 be arranged on peristome 41 of the past installation portion 48 surfaces to developer roll, and on doctor assemblies 40, be provided with hole 151 in the position corresponding with pin 161.This occasion, it is relative and be positioned at the state of the foreign side of sealing 87 behind the scraper preferably to be arranged to pin 161 and peristome 41.This is because will be from the cause of pin 161 with the clearance leakage in hole 151 if be arranged on interior side, toner.Again, hole 151 on the inserting hole that prevents the logical assembling screw 94 of inserting of member 58 in bending and the connecting line A of the mounting hole 81 of inserting logical mounting screw 100, is arranged between them.Thus, with from line A up and down direction situation that skew ground, hole 151 is formed compare, just can further dwindle the size of the above-below direction of handle box 18.In addition, a side hole 151 forms long slightly slotted hole on the length direction of peristome 41.Thus, can have tolerance in the formation position in the hole 151 of length direction.

Claims (30)

1. developing apparatus is characterized in that having:

The framework that the peristome of flute profile is arranged;

Along the configuration of the length direction of described peristome, can be rotated to support on the developer carrier on the described framework;

And be configured on the peristome of described framework, push the pressing member of the 1st containment member and the 2nd containment member,

Described the 1st containment member has the 1st spring rate, and the peristome, the state after being compressed with the 1st decrement between described pressing member and the described framework that are configured in described framework are held,

Described the 2nd containment member, have 2nd spring rate littler than described the 1st spring rate, at the peristome of described framework, be configured in abutting connection with ground with described the 1st containment member, and the state after being compressed with the 2nd decrement bigger than described the 1st decrement between described pressing member and the described framework is held.

2. developing apparatus as claimed in claim 1, it is characterized in that, described the 1st containment member and described the 2nd containment member, by utilizing described pressing member to be compressed with described the 1st decrement and described the 2nd decrement respectively, the thickness on the relative direction of described framework and described pressing member is equated.

3. developing apparatus as claimed in claim 1 or 2 is characterized in that, described pressing member constitutes by having than the high hard material of described the 1st containment member hardness.

4. developing apparatus as claimed in claim 1 or 2 is characterized in that, described pressing member is a side end pushes, the bed thickness of the developer that carried is limited the doctor assemblies of usefulness to described developer carrier on described developer carrier.

5. developing apparatus as claimed in claim 1 or 2 is characterized in that, described framework has:

Be communicated with, accommodate the resettlement section of developer with described peristome;

2 sidepieces that are positioned at the length direction both ends of described peristome, on the communication direction of described peristome and described resettlement section, along the face relative with described pressing member, extend with described developer carrier;

Intersect with the length direction of described peristome and with direction that described communication direction is intersected on, the connecting portion that extends at the length direction of described peristome, be connected between with described 2 sidepieces,

Described the 1st containment member is configured on the described sidepiece,

Described the 2nd containment member is configured on the described connecting portion.

6. developing apparatus as claimed in claim 1 or 2, it is characterized in that, described the 1st containment member and described the 2nd containment member, the end that adjoins each other disposes on the direction of described compression superimposedly, either party in the end of the end of this overlapped described the 1st containment member and described the 2nd containment member, be formed with to described the 1st containment member and described the 2nd containment member in abutting connection with the outstanding teat of direction.

7. developing apparatus as claimed in claim 6 is characterized in that, described the 2nd containment member is configured between described framework and described the 1st containment member.

8. developing apparatus as claimed in claim 1 or 2, it is characterized in that, at least one side of described the 1st containment member and described the 2nd containment member, with the surface of contact of described framework and with at least one side of the surface of contact of described pressing member, be formed with recess and protuberance.

9. developing apparatus as claimed in claim 8 is characterized in that, described recess and described protuberance form on described surface of contact continuously.

10. developing apparatus as claimed in claim 9 is characterized in that, described recess and described protuberance are extending with the direction that the direction that inboard with described peristome is connected with the outside is intersected.

11. developing apparatus as claimed in claim 1 or 2 is characterized in that, also has from the dike member (baffle) of described relatively the 1st containment member in the inboard of described peristome with the relative configuration of adjacent part of described the 2nd containment member.

12. developing apparatus as claimed in claim 1 or 2 is characterized in that, described developer is by polymerizable monomer is carried out the polymerized toner that polymerization obtained.

13. the handle box that relative imaging device can be installed and removed is characterized in that, has claim 1 or 2 described developing apparatuss.

14. an imaging device is characterized in that, has claim 1 or 2 described developing apparatuss or the described handle box of claim 13.

15. a developing apparatus is characterized in that having:

The framework that peristome is arranged;

The state that exposes in a part that is configured to make the surface on the described peristome, can be rotated to support on the described framework, the developer carrier of bearing developer in its surface;

Be the bed thickness lamellar, the developer at the side end on the direction of intersecting with this length direction the surface of described developer carrier being pushed, carried on to surface that extends at the length direction of described developer carrier and limit the scraper of usefulness at described developer carrier;

The fulcrum arrangement that the end side of described scraper is supported along the length direction of described scraper;

At the length direction both ends of described scraper, described scraper is separately fixed at the 1st fixed component and the 2nd fixed component on the described fulcrum arrangement;

And be arranged on the rib of strengthening usefulness between described at least the 1st fixed component and described the 2nd fixed component, to described scraper.

16. developing apparatus as claimed in claim 15 is characterized in that, described rib is formed described fulcrum arrangement.

17. developing apparatus as claimed in claim 16 is characterized in that,

Described fulcrum arrangement has the 1st supporting member on the side that is configured in described scraper and is configured in the 2nd supporting member on the another side of described scraper,

Described scraper by described the 1st supporting member and described the 2nd supporting member clamping,

Described rib is formed described the 1st supporting member.

18. developing apparatus as claimed in claim 17 is characterized in that,

Described the 1st supporting member has: along the length direction of described scraper extend, with the contact site of the described contacts side surfaces of described scraper; The portion that extends that the direction of intersecting from described contact site and end described developer carrier opposition side, to the described side with described scraper is extended,

The described portion of extending is used as described rib.

19. developing apparatus as claimed in claim 18 is characterized in that,

The described relatively scraper of described the 1st supporting member is set at described developer carrier and exposes side from what described peristome exposed;

The described portion that extends extends to the described side of exposing with end described developer carrying side opposition side from described contact site.

20. developing apparatus as claimed in claim 19 is characterized in that, described the 1st supporting member, have from the described free end that extends direction that extends portion to extend the handle part that direction that direction intersects is extended.

21. each the described developing apparatus as claim 18～20 is characterized in that,

Described the 1st fixed component and described the 2nd fixed component connect the length direction both ends of described contact site respectively;

The described portion that extends has: with direction that the length direction of described contact site intersects on relative with described the 1st fixed component respectively with described the 2nd fixed component, extending and have 2 end of the 1st width to extend portion on the direction;

Being arranged on 2 described ends extends between the portion, has the central authorities of 2nd width bigger than described the 1st width to extend portion on the direction extending.

22. developing apparatus as claimed in claim 21 is characterized in that, described handle part, extend from described central authorities on the length direction of portion at least one square end portion to extend the direction that direction intersects and extend.

23. each described developing apparatus as claim 18～20, it is characterized in that, the described portion that extends extends, has notch part at its length direction both ends to extending direction from the whole zone of length direction with end described developer carrying side opposition side described contact site.

24. developing apparatus as claimed in claim 21 is characterized in that,

Described the 1st fixed component and the 2nd fixed component have the screw rod that connects described the 1st supporting member, described scraper and described the 2nd supporting member respectively;

Be arranged on the axial end of described screw rod, the head of screw of relative configuration with described contact site.

25. developing apparatus as claimed in claim 21, it is characterized in that, also have length direction both ends in described framework, across described scraper and the configuration of described framework, carry out the 1st containment member of swiping with the surface at the length direction both ends of described developer carrier.

26. developing apparatus as claimed in claim 25 is characterized in that, described the 1st containment member has:

Be set on the described framework and length direction described developer carrier the both ends relative position, resilient base material;

Respectively across be provided with on the length direction both ends of described scraper and the described base material, with the swiping member of the surperficial swiping of described developer carrier.

27. each described developing apparatus as claim 15～20, it is characterized in that also having to be separately positioned on and more lean on the length direction outside of described scraper, described scraper be installed in the installation component of using on the described framework than described the 1st fixed component and the 2nd fixed component.

28. each the described developing apparatus as claim 15～20 is characterized in that,

Also have on a side end of described scraper, extend and push the pressing body that push described developer carrying surface to the length direction of described scraper,

Described the 1st fixed component and described the 2nd fixed component on the length direction of described scraper, are set at the inboard of two ora terminalis of described pressing body.

29. the handle box that relative imaging device can be installed and removed is characterized in that, has each described developing apparatus of claim 15～20.

30. an imaging device is characterized in that, has each the described developing apparatus or the described handle box of claim 29 of claim 15～20.

Images