CN104520773B - Box - Google Patents

Abstract

The present invention provides a kind of box for having guide part, which can steadily be directed to recording medium the counterpart of image carrier and transfer member.On the drum box (18) with photosensitive drums (20) and transfer roll (21), configuration is formed in the 1st guide part (65) of transfer roll (21) side, and 2nd guide part (74) of the and configuration opposite with the 1st guide part (65) in photosensitive drums (20) side at spaced intervals.1st guide part (65) and the 2nd guide part (74) are formed as guide part (79), and paper (S) is directed to the clamping part (46) of photosensitive drums (20) Yu transfer roll (21).

Description

Box

Technical field

The present invention relates to a kind of boxes being mounted on the image forming apparatuses such as laser printer.

Background technique

As image forming apparatus, it is known to a kind of printer, the printer have it is detachable to photoconductor drum and The box that transfer roll is kept.

As the box being detachably located on this printer, a kind of place including photoreceptor cartridge and Delevoping cartridge is proposed It manages unit (for example, referring to patent document 1), which keeps photoconductor drum and transfer roll, and the Delevoping cartridge is to aobvious Shadow roller is kept, and is detachably located on photoreceptor cartridge.

Also, in this processing unit, in the conveying direction upstream side of the counterpart of photoconductor drum and transfer roll, formed There is the transport path for paper to be directed to counterpart.

Patent document 1: Japanese Unexamined Patent Publication 2000-267549 bulletin

Summary of the invention

Problems to be solved by the invention

However, in the processing unit described in above-mentioned patent document 1, transport path by photoreceptor cartridge bottom wall upper table The lower surface of the bottom wall of face and Delevoping cartridge is formed.

Therefore, transport path combines formation with Delevoping cartridge by photoreceptor cartridge in processing unit.

As this processing unit, when forming transport path by combining all parts, because caused by combination Tolerance and cannot precisely form transport path, sometimes generate cannot stablize conveying paper unfavorable condition.

Therefore, the purpose of the present invention is to provide a kind of box with guide part, which can stablize recording medium Ground is directed to the counterpart of image carrier and transfer member.

Means for solving the problems

(1) to achieve the goals above, box of the invention includes the image carrier of bearing developer image；Transfer section Part, the transfer member is opposite with image carrier, and on the recording medium by developer image；And guide part, this is led It is located at the conveying direction upstream side of recording medium to the counterpart of portion's relative image supporting body and transfer member, which will Recording medium is directed to the guide part of counterpart.

Guide part includes the 1st guide part, the transport path of the 1st guide part relative record medium and close to transfer member Ground configuration；And the 2nd guide part, the 2nd guide part interval and it is opposite with the 1st guide part, and relative record medium is defeated It send path and is configured close to image carrier.

According to this structure, the guide part that recording medium is directed to counterpart is formed on box, guide part, which has, to be leaned on The 1st guide part configured to nearly transfer member, and the 2nd guide part configured close to image carrier.That is, the 1st guide part It is formed on common box with the 2nd guide part.

Therefore, it is arranged on all parts with the 1st guide part and the 2nd guide part, and by combining all parts and shape It is compared at the case where guide part, the present invention can eliminate the error because of relative position caused by combination, as a result, can be precisely Form guide part

As a result, recording medium is steadily directed to counterpart using the guide part being located on box.

(2) the 2nd guide parts can also have to image carrier protrusion outstanding.

According to this structure, recording medium is held when being directed to counterpart from guide part and with the 2nd guide part to image Carrier protrusion contact outstanding.

Therefore, recording medium is directed to counterpart from protrusion.

As a result, the friction of recording medium and guide part can be reduced, also, it can reliably pass through protrusion for recording medium It is directed near counterpart.

In addition, recording medium is directed near counterpart since protrusion can be passed through, it is therefore possible to prevent recording medium is opposite The winding of image carrier.

(3) in addition, on the 1st guide part, the recessed of oriented transfer member recess can also be formed in the position opposite with protrusion Portion.

According to this structure, when recording medium is directed to counterpart, in the region for being formed with recess portion, record can be reduced The contact area of medium and the 1st guide part.

Therefore, the friction of recording medium and guide part can be further decreased, and can be oriented to transfer unit by protrusion To counterpart.

(4) in addition, the 1st guide part can also have the guidance aid for being set as covering the most deep of recess portion.

According to this structure, recording medium by guide part when being oriented to, in the case where entering the recess portion of the 1st guide part, Recording medium can be made to contact with guidance aid and correct conveying direction.

On the other hand, in the case where recording medium is steadily directed to counterpart, when by between protrusion and recess portion When, it will not contiguously be conveyed with guidance aid.

As a result, can prevent the friction of recording medium and the 1st guide part from increasing, and recess portion is entered in recording medium In the case where, conveying direction can be corrected by guidance aid.

(5) in addition, can also have the developer carrier of bearing developer, also having holds image carrier with developer The opposite developing cell of carrier, developing cell configure the opposite side in transfer member across image carrier.

It according to this structure, can be in the conveying direction upstream side of the counterpart of transfer member and image carrier in box Ensure the space for guide part to be arranged.

Therefore, guide part can be formed near counterpart, and reliably recording medium can be oriented to.

In addition, the 1st guide part in guide part is located in the case that the 2nd guide part is located on developing cell on box, it is difficult to 2nd guide part is extended to image carrier and is configured between the transfer member of opposite side across image carrier Counterpart.

But according to the structure for forming guide part on box, since the 1st guide part and the 2nd can be arranged on common box Therefore recording medium can be steadily directed to counterpart by guide part.

The effect of invention

In box of the invention, recording medium can be steadily directed to the counterpart of image carrier and transfer member.

Detailed description of the invention

Fig. 1 is the sectional view of the printer equipped with drum box of an embodiment of the present invention.

Fig. 2 is the sectional view of handle box shown in FIG. 1.

Fig. 3 is the perspective view that bulging box shown in Fig. 2 is seen from lower left side.

Fig. 4 is the bottom view of bulging box shown in Fig. 2.

Fig. 5 is the perspective view that handle box shown in Fig. 2 is seen from lower left side.

Specific embodiment

1. the overall structure of printer

As shown in Figure 1, the printer 1 equipped with drum box 18 of an embodiment of the present invention has the main body of substantially box shape Shell 2.

In addition, including the sheet feed section 3 for supplying paper S in the main body cover 2 of printer 1；And for being supplied The image forming part 4 of image is formed on the paper S given.

In addition, about printer 1 and handle box 15 (aftermentioned), when mentioning direction, when being placed respectively with horizontal direction On the basis of direction, specifically, on the basis of the arrow direction shown in each figure.

That is, about the front-rear direction up and down in Fig. 1 of printer 1, with Fig. 2 about drum box 18 (aftermentioned) into Fig. 5 Upper and lower front-rear direction is different, and drum box 18 (aftermentioned) is the preceding downside of printer 1 with its front side, and rear side is printer 1 The mode of rear side is mounted on printer 1.

(1) main body cover

It is formed on shell 2 outside the main body: for assembling and disassembling the box opening portion 5 of handle box 15 (aftermentioned)；And for importing paper Open the paper opening portion 6 of S.

Box opening portion 5 is that the upper end of shell 2 outside the main body is formed through along the vertical direction.

Paper opening portion 6 is that the lower end of the front end of shell 2 outside the main body is formed through along the longitudinal direction.

In addition, the upper end of shell 2 is equipped with upper cover 7 outside the main body, the front end of shell 2 is equipped with paper supply the cover 8 outside the main body.

Upper cover 7 can be using end thereafter as fulcrum and in the closed position for being closed box opening portion 5, and by box opening portion (movement) is swung between 5 open release positions.

Paper supply the cover 8 can be using its lower end as fulcrum and in the 1st position for being closed paper opening portion 6, and by paper Opening portion 6 is swung (movement) between the 2nd open position.

(2) sheet feed section

Sheet feed section 3 has the paper placement section 9 being located on the bottom of main body cover 2.

Paper placement section 9 is connected to by paper opening portion 6 with the external of main body cover 2.

Also, paper S is configured in the state of the 2nd position and open paper opening portion 6 in the configuration of paper supply the cover 8.More It says to body, the front part of paper S is laminated in the upper surface of paper supply the cover 8, while the rear section of paper S is open by paper Portion 6 and be laminated in paper placement section 9.

In addition, sheet feed section 3, which includes configuration, picks up roller 11 on the upside of the rear end of paper placement section 9；Roller is being picked up in configuration The paper feed roller 12 of 11 rear side；Be relatively configured paper feed roller 12 rear side for paper washer 13；And after for paper washer 13 The paper supply channel 14 that end continuously extends upwards.

(3) image forming part

Image forming part 4 has handle box 15, scanning element 16 and fixation unit 17.

(3-1) handle box

Handle box 15 can be assembled and disassembled with respect to main body cover 2, when being mounted on main body cover 2, be configured in sheet feed section 3 Rear section upside.

Handle box 15 includes the drum box 18 as an example that can carry out the box constituted with assembling and disassembling with respect to main body cover 2；With And as being capable of the Delevoping cartridge 19 of an example of Delevoping cartridge assembled and disassembled of the opposite drum box 18.

Drum box 18 includes the photosensitive drums 20 of an example as image carrier；The transfer roll of an example as transfer member 21；And grid-control formula corona charger 22.

Photosensitive drums 20 are formed as long cylindrical shape in left-right direction, and are rotatably provided in the rear section of bulging box 18 On.

Transfer roll 21 be formed as extending in left-right direction it is generally cylindrical shaped, it is rotatable and in the rear side of photosensitive drums 20 Ground is located on the rear section of bulging box 18.Transfer roll 21 is crimped in photosensitive drums 20 from rear side.

In detail, transfer roll 21 is in a manner of axis center of its axis center compared to photosensitive drums 20 and slightly within downside Configure the rear side in photosensitive drums 20.In addition, the lower ora terminalis of transfer roll 21 compared to photosensitive drums 20 lower ora terminalis and configure in upside. Specifically, the imaginary line segment (not shown) that the axis center of transfer roll 21 is connect with the axis center of photosensitive drums 20 with along front and back Being formed by sharp angle to horizontal-extending imaginary line (not shown) is about 3 °.Therefore, transfer roll 21 is crimped on photosensitive drums Pressure (transfer pressure) on 20 is not by the effect of weight of transfer roll 21.

Grid-control formula corona charger 22 is arranged opposite at the front upper side of photosensitive drums 20 at spaced intervals.

Specifically, grid-control formula corona charger 22 is configured to, and in the circumferentially spaced compartment of terrain of photosensitive drums 20, configuration exists On transfer roll 21, and connects axis center and the imaginary line segment (not shown) of the axis center of transfer roll 21 of photosensitive drums 20 and connect sense It is approximately 120 ° that the axis center of light drum 20 and the imaginary line segment (not shown) of live line 23 (aftermentioned), which are formed by the angle of angle,.

In addition, grid-control formula corona charger 22 has live line 23 and grid 24.

Live line 23 is tensioned setting in a manner of extending in left-right direction, and is arranged opposite at photosensitive drums 20 at spaced intervals Front upper side.

Grid 24 is formed as substantially U-shaped when the open side of forward upward is seen, and is set as surrounding from rear side and charge Line 23.

Delevoping cartridge 19 is configured in the preceding downside of photosensitive drums 20, and has developing frame 25.

In developing frame 25, it is formed with toner reception room 26 and developing room 27 in tandem.Toner reception room 26 It is respectively formed as roughly the same, and is connected to by communication port 28 with the volume of developing room 27.

Toner (developer) is contained in toner reception room 26, before and after the toner reception room up and down direction substantially in Centre part is equipped with blender 29.That is, the configuration of blender 29 is in the downside of photosensitive drums 20.

In the upper surface of the lower wall of developing room 27, it is formed with supply roller slot 30, developer roll opposite face 31 and lower film patch Attached face 32.

Supply roller slot 30 is the substantially semi-circular shape along the circumferential surface of supply roller 33 (aftermentioned), and is formed as recessed to the back lower place It falls into.

Developer roll opposite face 31 is the substantially circular shape along the circumferential surface of developer roll 34 (aftermentioned), and is formed as from supply roller The rear end of slot 30 continuously extends rearwardly and upwardly.

Lower film attaches face 32 and is formed as, and continuously rearward extends from the rear end of developer roll opposite face 31.It is thin under that is, Film attaches the configuration of face 32 in the upside of developer roll opposite face 31.

It is oppositely disposed at spaced intervals in the up-down direction in addition, lower film attaches face 32 in the following side of photosensitive drums 20 Point, and lower film attaches face 32 and is configured to, it is Chong Die with the axis center of photosensitive drums 20 when projecting in the up-down direction.

In addition, developing room 27 is equipped with: supply roller 33；The developer roll 34 of an example as developer carrier；Thickness limitation Scraping blade 35；And lower film 36.

Supply roller 33 be formed as extending in left-right direction it is generally cylindrical shaped, and with its lower portion configure in supply roller Mode in slot 30 is rotatably provided on the rear section of developing room 27.The configuration of supply roller 33 is in toner reception room as a result, 26 rear side, and it is configured to the height roughly the same with toner reception room 26 in the up-down direction (slightly than toner chamber 26 It is upper).

Developer roll 34 is formed as extending in left-right direction rotary shaft that is generally cylindrical shaped, and passing through insert developer roll 34 Bushing 44 (referring to Fig. 5) and be supported in the developer roll support slot 56 (aftermentioned) of bulging box 18.Developer roll 34 is as a result, with its downside Circumferential surface in the part mode opposite with the separated from each other compartment of terrain of developer roll opposite face 31, after being rotatably provided in developing room 27 In side section.

In addition, developer roll 34 is set as, contacted from rear upside with supply roller 33, and the upside of developer roll 34 and rear section Expose from developing room 27, and downside is contacted with photosensitive drums 20 in the past.That is, developer roll 34 is configured in the rear upside of supply roller 33, and And configuration is in the preceding downside of photosensitive drums 20.Also, the axis of the axis center of supply roller 33, the axis center of developer roll 34 and photosensitive drums 20 Center is located at along the radial substantially same straight line of photosensitive drums 20.

In addition, the circumferentially spaced compartment of terrain of developer roll 34 and photosensitive drums 20 configures on grid-control formula corona charger 22, And be configured to, connect the axis center of photosensitive drums 20 and the imaginary line segment (not shown) of live line 23, and the axis of connection photosensitive drums 20 It is about 120 ° that the imaginary line segment (not shown) of the axis center of center and developer roll 34, which is formed by the angle of angle,.That is, developer roll 34, grid-control formula corona charger 22 and transfer roll 21 are equally spaced configured in the circumferentially spaced of photosensitive drums 20 respectively.

The upper end of thickness limitation scraping blade 35 is fixed on the rear end of 27 upper wall of developing room, and thickness limits under scraping blade 35 End is contacted from front side with developer roll 34.

The rear section of lower film 36 is fixed on lower film and attaches on face 32, and the front end of lower film 36 is opposite in developer roll The top in face 31 and all face contacts of developer roll 34.

(3-2) scanning element

Scanning element 16 configure in the front side of handle box 15, and in the longitudinal direction at spaced intervals with 20 phase of photosensitive drums It is right.

Scanning element 16 is projected laser beam L towards photosensitive drums 20 based on image data, exposes the circumferential surface of photosensitive drums 20 Light.

Specifically, laser beam L is rearward projected from scanning element 16, exposes the circumferential surface of the front end of photosensitive drums 20. That is, the exposure point (circumferential surface of 20 front end of photosensitive drums) that photosensitive drums 20 are exposed, relative to photosensitive drums 20 axis center and set In the opposite side of the clamping part 46 of an example of the counterpart contacted as photosensitive drums 20 with transfer roll 21.

At this point, downside of the configuration of Delevoping cartridge 19 in the injection track of laser beam L, the configuration of grid-control formula corona charger 22 are swashing The upside of the injection track of light beam L.

In addition, being equipped in the medial surface of the main body cover 2 corresponded between scanning element 16 and photosensitive drums 20 to handle box The guide part 37 that 15 assembly and disassembly are oriented to.Also, when handle box 15 is detached from main body cover 2, handle box 15 is by guide part 37 Guiding, the Delevoping cartridge 19 being mounted on bulging box 18 as a result, pass through the injection track of laser beam L from downside to upside.

At this point, the various rollers (transfer roll 21, supply roller 33 and developer roll 34) being located on handle box 15 are also upward from downside Side passes through the injection track of laser beam L.

(3-3) fixation unit

The configuration of fixation unit 17 is in the upside of the rear section of drum box 18.Specifically, fixation unit 17 includes configuration and exists The heating roller 38 of 22 top of grid-control formula corona charger；And the pressure roller 39 crimped from rear upside with heating roller 38.

That is, the configuration of heating roller 38 is near 24 upper end of grid (open side end) of grid-control formula corona charger 22.

(4) image formation acts

Toner in the toner reception room 26 of Delevoping cartridge 19 is supplied with the rotation of blender 29 via communication port 28 It is given to supply roller 33, is re-supplied to developer roll 34, is charged by friction between supply roller 33 and developer roll 34 as anode.

For being supplied to the toner of developer roll 34, thickness limits scraping blade 35 by thickness with the rotation of developer roll 34 Limitation, is made certain thickness thin layer and is carried on the surface of developer roll 34.

On the other hand, the surface of photosensitive drums 20 is single by scanning after utilization grid-control formula corona charger 22 and by uniform charged Member 16 exposes.It is formed on the circumferential surface of photosensitive drums 20 based on electrostatic latent image obtained from image data as a result,.Also, it is carried on Toner on developer roll 34 is fed into the electrostatic latent image on 20 circumferential surface of photosensitive drums, adjusts to carry on 20 circumferential surface of photosensitive drums Toner image (developer image).

The paper S for being laminated in paper placement section 9 is sent to paper feed roller 12 and for paper washer 13 and picking up the rotation of roller 11 Between, and separated one by one by the rotation of paper feed roller 12.Then, the paper S after separating passes through the rotation of paper feed roller 12 Then be transported to paper supply channel 14, and be supplied to one by one with the defined time image forming part 4 (photosensitive drums 20 with turn It prints between roller 21).

Also, paper S is conveyed between photosensitive drums 20 and transfer roll 21 from downside to upside.At this point, toner image It is transferred on paper S, forms image.

Also, paper S is heated and pressurizes when by between heating roller 38 and pressure roller 39.At this point, image is fixed by heat Shadow is on paper S.

Then, paper S is transported to exit roller 40, and the row for being formed in 2 upper surface of main body cover is discharged to by exit roller 40 On paper pallet 41.

So, paper S is supplied from paper placement section 9, paper S passes through between photosensitive drums 20 and transfer roll 21 (clamping Portion 46), then, it is discharged on discharge tray 41 after by between heating roller 38 and pressure roller 39, is seen in this wise in side To be conveyed on the transfer passage of substantially C-shaped.

2. the detailed construction of drum box

As shown in Figures 2 and 3, drum box 18 is shaped generally as bottomed rectangular shape frame shape, and has drum frame 48.

Drum frame 48 includes pair of right and left side wall 49 (referring to Fig. 3)；The antetheca being erected between the front end of two sidewalls 49 50；It is erected at the upper wall 51 of the top between the rear end of two sidewalls 49；And it is erected at the lower wall between the lower end of two sidewalls 49 52。

Extend forward and backward as shown in figure 3, two sidewalls 49 are formed as its front part, side section extends upwards thereafter Generally L-shaped shape of side when seeing.In addition, two sidewalls 49 have drum axis insertion hole 55 and developer roll support slot 56.

Drum axis insertion hole 55 penetrates through in left-right direction in the rear section of side wall 49, and is formed to take in photosensitive drums 20 It is substantially circular when the side of rotary shaft 43 is seen.

Developer roll support slot 56 is formed as the rear section front-end edge from side wall 49 between front part and rear section The substantially rectangular shape when side being rearward recessed is seen.Developer roll support slot 56 is formed to take in the bushing of Delevoping cartridge 19 44。

It as shown in Figures 2 and 3, is the slab of substantially rectangular shape when the front that antetheca 50 is formed as extending in left-right direction is seen Shape, and its left and right directions substantial middle have handle part 58, the handle part 58 make handle box 15 with respect to main body cover 2 into Handle box 15 is held when row installation or disengaging.

Upper wall 51 is formed as the substantially rectangular shape when vertical view extended in left-right direction, and is erected at 49 rear lateral portion of two sidewalls Between the upper end divided.

Lower wall 52 is formed as substantially rectangular shape when looking up extended along the longitudinal direction.In addition, lower wall 52 is included for receiving Hold the transfer roll supporting part 61 of transfer roll 21；And the Delevoping cartridge supporting part 62 for installing Delevoping cartridge 19.

Transfer roll supporting part 61 is located on the rear end of drum frame 48, and be formed as circumferential surface along transfer roll 21 and backward under Substantially U-shaped when the side of side bulging is cutd open.As shown in Fig. 2, the front end of transfer roll supporting part 61 is in front-rear direction and Delevoping cartridge Supporting part 62 configures at spaced intervals, and the upper end of transfer roll supporting part 61 is matched with upper wall 51 at spaced intervals in above-below direction It sets.

Also, the front end of transfer roll supporting part 61 and Delevoping cartridge supporting part 62 (being aftermentioned protrusion 77 in detail) it Between open area, be divided into the paper supply opening portion 80 that paper S is supplied to clamping part 46.The upper end of transfer roll supporting part 61 Open area between portion and upper wall 51 is divided into the paper discharge opening portion 81 that paper S is discharged from clamping part 46.

As shown in figure 3, being formed with multiple (being in the present embodiment six) through holes 64 on transfer roll supporting part 61.

Through hole 64 is formed in the front side of transfer roll supporting part 61 at spaced intervals in the lateral direction.The formation of through hole 64 For the substantially rectangular shape for penetrating through transfer roll supporting part 61 along the vertical direction.

In addition, transfer roll supporting part 61 includes the 1st guide part 65；Multiple (being in the present embodiment ten) ribs 70；And a pair of 1st plate 66.

As shown in Fig. 2, what the 1st guide part 65 was formed as continuously extending downward from the front end of transfer roll supporting part 61 Substantially writing board shape.That is, transport path of the 1st guide part 65 with respect to paper S and close to 21 ground of transfer roll configure.

As shown in figure 3, being formed with multiple (being in the present embodiment four) recess portions 67 on the 1st guide part 65.

The separated from each other compartment of terrain configuration in the lateral direction of recess portion 67, and the lower end for being formed as the 1st guide part 65 is opened Put, and be recessed upwards vertical view when substantially U-shaped.That is, recess portion 67 is formed in a manner of being recessed to transfer roll 21.Recess portion 67 Upper surface be divided into most deep 71 (referring to Fig. 2).

In addition, being integrally formed with multiple (being in the present embodiment five) protruding portions 69 on the 1st guide part 65.

Separated from each other compartment of terrain is located under the 1st guide part 65 protruding portion 69 in left-right direction in a manner of avoiding recess portion 67 End, and protrude forwards.

In addition, as shown in Figures 2 and 3, the supporting film of an example as guidance aid is equipped on the 1st guide part 65 68。

Supporting film 68 is made of flexible film, is formed in left-right direction longer.Supporting film 68 is with from protrusion The mode of rear end covering 65 front surface of the 1st guide part of the upper surface in portion 69 is configured.That is, supporting film 68 be configured to by Recess portion 67 covers.In addition, the ora terminalis of the upstream side of the conveying direction along paper S of supporting film 68 is divided into and is fixed on protrusion Upstream end 68a on the rear end of the upper surface in portion 69, the ora terminalis of side is divided into close under 20 circumferential surface of photosensitive drums downstream Swim end 68b.

Ribs 70 is formed as writing board shape when side is seen for roughly triangular shape, and avoids being formed in the 1st guide part Four recess portions 67 on 65 and six through holes 64 being formed on transfer roll supporting part 61 and it is separated from each other in the lateral direction It is positioned apart from, and is configured to for the rear surface of the 1st guide part 65 connecting with the lower surface of transfer roll supporting part 61.

As shown in figure 3, the 1st plate 66 is formed as, from the both ends of transfer roll supporting part 61, downside is outstanding forward, and side is seen When for substantially rectangular writing board shape.

As shown in Fig. 2, the lower end of the 1st plate 66 protrudes downwards compared to lower wall 52.

The front side interval of Delevoping cartridge supporting part 62 and transfer roll supporting part 61 and the front side configured in drum frame 48, and Its front end is formed as the substantially writing board shape connecting with the lower end of antetheca 50.

It is formed on Delevoping cartridge supporting part 62 and holds hole 73.

As shown in figure 3, holding hole 73 in substantially central portion when looking up of Delevoping cartridge supporting part 62, be formed as vertically side To the substantially rectangular shape of perforation Delevoping cartridge supporting part 62.

It holds hole 73 to be formed as, it can be held when drum frame 48 is positioned to opposite up and down.

In addition, as shown in Figures 2 and 3, Delevoping cartridge supporting part 62 has the 2nd guide part 74 and multiple (in present embodiment In be six) the 2nd plate 75.

2nd guide part 74 is formed as after the rear end from Delevoping cartridge supporting part 62 rearward extends, slightly rearward top Curved substantially writing board shape.That is, the 2nd guide part 74 is opposite with the 1st guide part 65 at spaced intervals in the longitudinal direction, and phase The transport path of paper S is configured close to 20 ground of photosensitive drums.

In addition, the 1st guide part 65 and the 2nd guide part 74 are formed on bulging box 18, by the 1st guide part 65 and 2 guide parts 74 form guide part 79.

On the 2nd guide part 74, it is formed with outstanding multiple (at this from the end edge of the 2nd guide part 74 to photosensitive drums 20 It is four in embodiment) protrusion 77.

The separated from each other compartment of terrain configuration in the lateral direction of protrusion 77, when projecting in the longitudinal direction, is formed as distinguishing Position identical with each recess portion 67.That is, as shown in figure 4, in the longitudinal direction the position opposite with each protrusion 77 be formed with it is each recessed Portion 67.

As shown in figure 3, the 2nd plate 75 is when being formed as in terms of the following table of Delevoping cartridge supporting part 62 downwards side outstanding The substantially writing board shape of substantially rectangular shape.Specifically, the 2nd plate 75 is from two ora terminalis of left and right directions in holding hole 73 to left and right directions Outside is separated from each other to be positioned apart from, and is configured with four in the left side for holding hole 73, is configured with two on the right side for holding hole 73 ?.

As shown in Fig. 2, identically as the 1st plate 66, the lower end of the 2nd plate 75 protrudes downwards compared to lower wall 52.

Also, the interval between the 1st guide part 65 and the 2nd guide part 74 is with towards the conveyance direction downstream side of paper S And narrow, the supporting film 68 that the recess portion of the 1st guide part 65 covers is configured to, with towards conveyance direction downstream side and to convex Portion 77 tilts.

In addition, as described above, drum box 18 has photosensitive drums 20, transfer roll 21 and grid-control formula corona charger 22.

The left and right directions both ends of the rotary shaft 43 extended along the central axis of photosensitive drums 20 rotate on the inside of left and right directions It is inserted in the drum axis insertion hole 55 of two sidewalls 49 freely, photosensitive drums 20 are rotatably provided on bulging box 18 as a result,.As a result, Photosensitive drums 20 are configured to cover from top by upper wall 51.

Transfer roll 21 extends in left-right direction, and be supported in transfer roll supporting part 61 it is rotatable, transfer roll 21 A part of circumferential surface is exposed from the multiple through holes 64 for being formed in transfer roll supporting part 61.

Grid-control formula corona charger 22 is embedded in the front-rear direction substantially central portion of upper wall 51.

In addition, being divided into development by two sidewalls 49, antetheca 50, Delevoping cartridge supporting part 62 and photosensitive drums 20 in drum box 18 Box mounting portion 82.

3. the handle box installation on shell outside the main body

(1) installation of the Delevoping cartridge on drum box

Handle box 15 is mounted on main body cover 2, then needs that Delevoping cartridge 19 is mounted on bulging box 18 first.

Delevoping cartridge 19 is mounted on bulging box 18, then needs the Delevoping cartridge peace that Delevoping cartridge 19 is assembled in bulging box 18 from upside In dress portion 82.

In detail, the rear end of Delevoping cartridge 19 is inserted into the rear end of the Delevoping cartridge mounting portion 82 of bulging box 18 from upside Portion.

Also, the bushing of Delevoping cartridge 19 44 is inserted into the developer roll support slot 56 of bulging box 18.

Then, when making front end downward side oscillation (rotation) of Delevoping cartridge 19 with bushing 44 for fulcrum, Delevoping cartridge 19 Lower surface abutted with the upper surface of Delevoping cartridge supporting part 62, Delevoping cartridge 19 relatively rouse box 18 installation terminate, formed handle box 15 (referring to Fig. 5).

At this point, Delevoping cartridge 19 configures the opposite side in transfer roll 21 across photosensitive drums 20 in the longitudinal direction.

In addition, to make Delevoping cartridge 19 be detached from drum box 18, then need with above-mentioned movement on the contrary to Delevoping cartridge 19 and drum box 18 into Row operation.

So, Delevoping cartridge 19 is dismantledly mounted on the Delevoping cartridge mounting portion 82 of bulging box 18.

(2) the handle box installation on shell outside the main body

Then, handle box 15 (the drum box 18 for being equipped with Delevoping cartridge 19) will be formed as described above and be mounted on main body cover 2 On.

Handle box 15 is mounted on main body cover 2, then first as shown in Figure 1, as described above, making main body cover 2 Upper cover 7 is configured in release position.

Then, the front end for holding handle box 15, handle box 15 is inserted into main body cover 2 via box opening portion 5.

Also, when handle box 15 to be pushed into along guide part 37 to rear side, handle box 15 is inserted in main body cover 2 It is interior.

According to above-mentioned, installation of the handle box 15 outside the main body on shell 2 terminates.

4. the conveying of paper

As described above, paper S is supplied to image forming part 4 from paper placement section 9 with the defined time one by one.

As a result, as shown in Fig. 2, paper S from downside to upside by paper supply opening portion 80, before clamping part 46 by with The protrusion 77 of 2nd guide part 74 contacts, and is oriented to clamping part 46.Also, on paper S, by being transferred by clamping part 46 Toner image and form image.Then, paper S is transported to heating roller 38 and adds by paper discharge opening portion 81, then to upside Between pressure roller 39.

On the other hand, the conveying of above-mentioned paper S on the way, paper S be biased to the 1st 65 side of guide part in the case where, paper S is just in recess portion 67 to be entered.

But the supporting film 68 due to being arranged in a manner of covering recess portion 67 is tilted to protrusion 77, paper S quilt It is remedied to normal transport path.

5. function and effect

(1) according to this bulging box 18, as shown in Fig. 2, being formed on the drum frame 48 of drum box 18 by paper S to clamping part The guide part 79 of 46 guiding, the guide part 79 include the 1st guide part 65 configured close to transfer roll 21；And close to photosensitive drums 2nd guide part 74 of 20 configurations.That is, the 1st guide part 65 and the 2nd guide part 74 are formed on together on bulging box 18.

Therefore, be respectively provided on bulging box 18 and Delevoping cartridge 19 compared to the 1st guide part 65 and the 2nd guide part 74, pass through by The case where drum box 18 and Delevoping cartridge 19 combine and form guide part 79, since the mistake of the relative position generated by combination can be eliminated Therefore difference can precisely form guide part 79.

As a result, folder can be steadily directed to paper S using the guide part 79 being integrally provided on bulging box 18 Hold portion 46.

(2) in addition, according to this bulging box 18, as shown in Fig. 2, paper S when being directed to clamping part 46 with the 2nd guide part After 74 rear surface integrally contacts, and it is located at contacting to the protrusion 77 outstanding of photosensitive drums 20 for conveyance direction downstream side.

Therefore, paper S is directed to clamping part 46 from protrusion 77.

As a result, the friction of paper S Yu guide part 79 can be reduced, and can be using protrusion 77 and reliably by paper S It is directed near clamping part 46.

In addition, feeling since paper S being directed near clamping part 46 using protrusion 77 it is therefore possible to prevent paper S is opposite The winding of light drum 20.

(3) in addition, according to this bulging box 18, as shown in figure 4, on the 1st guide part 65, in the position opposite with protrusion 77 Form the recess portion 67 that oriented transfer roll 21 is recessed.

Therefore, when paper S is directed to clamping part 46, in the region for being formed with recess portion 67, paper S and the 1st can be reduced The contact area of guide part 65.

As a result, the friction of paper S Yu guide part 79 can be further decreased, and paper S is led using protrusion 77 To arrive clamping part 46.

(4) in addition, according to this bulging box 18, the most deep 71 of recess portion 67 is hidden as shown in figure 3, the 1st guide part 65 has The supporting film 68 of lid.

Therefore, though paper S by guide part 79 be oriented to when into the 1st guide part recess portion 67, can also make paper S with it is auxiliary Film 68 is helped to contact and correct conveying direction.

On the other hand, in the case where paper S is steadily directed to clamping part 46, when paper S by protrusion 77 with it is recessed When between portion 67, will not contiguously it be conveyed with supporting film 68.

As a result, can prevent the friction of paper S and the 1st guide part 65 from increasing, and even if paper S enters recess portion 67, Supporting film 68 can also be used to correct conveying direction.

(5) in addition, according to this bulging box 18, as shown in Fig. 2, photosensitive drums 20 are opposite with developer roll 34 to be shown with being mounted to Shadow box 19, Delevoping cartridge 19 configure the opposite side in transfer roll 21 across photosensitive drums 20.

Therefore, in drum box 18, in the conveying direction upstream side of clamping part 46, it can be ensured that for the sky of guide part 79 to be arranged Between.

As a result, guide part 79 can be formed near clamping part 46, reliably paper S can be oriented to.

In addition, being equipped with the 2nd guide part on Delevoping cartridge 19 when the 1st guide part 65 for being equipped with guide part 79 on drum box 18 When 74, it is difficult to the 2nd guide part 74 is arranged to photosensitive drums 20 with extending and configure the transfer in opposite side with across photosensitive drums 20 Clamping part 46 between roller 21.

But if forming guide part 79 on drum box 18, due to can be by the 1st guide part 65 and the 2nd guide part 74 together It is located on bulging box 18, therefore, paper S can be steadily directed to clamping part 46.

6. other embodiment

Above-mentioned drum box 18 is an embodiment of box of the invention, and the present invention is not limited to above-mentioned embodiments.

The drum box 18 of one embodiment of the present invention is mounted on the printer 1 of an example as image forming apparatus, but Image forming apparatus also may be configured as color printer other than above-mentioned black-and-white printer.

In the case where image forming apparatus is configured to color printer, it also may be configured as that there is multiple photoreceptors and note The direct-type tandem type color printer of recording medium transfer unit, or be configured to that there is multiple photoreceptors, middle transfer body and turn Print the intermediate transfer formula tandem type color printer of component.

In addition, box of the invention also may be configured as above-mentioned handle box 15.

In addition, handle box 15 also may be configured as other than bulging box 18 as described above and the isolated divergence type of Delevoping cartridge 19 It is provided integrally with the one-piece type of bulging box 18 and Delevoping cartridge 19.

In addition, photosensitive drums 20 can also be arranged on shell 2 outside the main body, assemble and disassemble Delevoping cartridge 19 with main body cover 2.

In addition, Delevoping cartridge 19 also may be configured as: the toner Cartridge for accommodating toner, which is detachably mounted on, has development On the frame of roller 34.

In addition, it is possible to use the photoreceptor such as sensitive tape replaces above-mentioned photosensitive drums 20.

In addition, it is possible to use such as development sleeve, strip-like developing pipe, brush roller developer carrier it is above-mentioned aobvious to replace Shadow roller 34.

In addition, it is possible to use such as supply sleeve, supply belt, brush roller supply part replace above-mentioned supply roller 33。

In addition, it is possible to use the transfer unit such as auger stem or conveyer belt replaces above-mentioned blender 29.

In addition, it is possible to use the contact-type such as transfer belt, transfer brush, transfer blade, film type transfer device transfers Component, or non-contact type transfer member etc. such as corona type is used, to replace above-mentioned transfer roll 21.

In addition, it is possible to use non-contact type charger or use example such as corona charger, jagged discharge component Such as charged roller contact-type charger etc., to replace above-mentioned grid-control formula corona charger 22.

In addition, it is possible to use the exposure component such as LED unit replaces above-mentioned scanning element 16.

In addition, image forming apparatus of the invention is configured to all-in-one multifunctional machine also provided with image reading unit etc..

Description of symbols

18 drum boxes

19 Delevoping cartridges

20 photosensitive drums

21 transfer rolls

34 developer rolls

46 clamping parts

65 the 1st guide parts

67 recess portions

68 supporting films

74 the 2nd guide parts

77 protrusions

79 guide parts

Claims (2)

1. a kind of box comprising:

It is configured to the image carrier of bearing developer image；

Transfer member, the transfer member is opposite with described image supporting body, and is configured to for developer image being situated between in record In matter；And

Guide part, the guide part are located at the recording medium with respect to the counterpart of described image supporting body and the transfer member Conveying direction upstream side, which is configured to the recording medium being directed to the counterpart,

The guide part includes

1st guide part, the transport path of the relatively described recording medium of the 1st guide part and close to the transfer member configure； And

2nd guide part, the 2nd guide part interval and it is opposite with the 1st guide part, and the relatively described recording medium is defeated It send path and is configured close to described image supporting body, and the 2nd guide part is with outstanding to described image supporting body Protrusion；

Wherein, on the 1st guide part, the recessed of the oriented transfer member recess is formed in the position opposite with the protrusion Portion；

1st guide part has the guidance aid for being set as covering the most deep of the recess portion.

2. box as described in claim 1, which is characterized in that the box has the developer carrying for being configured to bearing developer Body also has the developing cell for being configured to keep described image supporting body opposite with the developer carrier,

The opposite side that the developing cell configured across described image supporting body in the transfer member.