CN201707551U

CN201707551U - Doctor blade

Info

Publication number: CN201707551U
Application number: CN2010202438234U
Authority: CN
Inventors: 唐小强; 张谦
Original assignee: Print Rite Unicorn Image Products Co Ltd
Current assignee: Print Rite Unicorn Image Products Co Ltd
Priority date: 2010-06-30
Filing date: 2010-06-30
Publication date: 2011-01-12
Anticipated expiration: 2020-06-30
Also published as: WO2012000422A1

Abstract

The utility model provides a doctor blade, which comprises an elastic blade, wherein the blade has a fixing part for fixing the blade and a cantilever part extended out from the fixing part; a part of the external end of the cantilever part is contacted with a developer roller; the contacted part has a front face facing the developer roller during working, a back face back to the developer roller during working and an end face connected with the front face and the back face; and a film layer is arranged on the surface of the contacted part and attached on the front face and the end face of the contacted part at the same time, so that the external edge of the film layer is far away from a working area where the film layer is contacted with the developer roller. The above mentioned wrapped structure enhances the adhesive force of the film layer and overcomes the defects that the tail end of the existing doctor blade having the film layer is easy to damage and warp after the doctor blade is used for printing for a period of time.

Description

A kind of powder delivery cutter

Technical field

The utility model relates to the laser printing technology field, specifically a kind of powder delivery cutter that is installed in the laser printer carbon powder box.

Background technology

Laser printer is one of present most widely used computing machine output peripheral equipment, and it utilizes the physics, the principles of chemistry of light, electricity, heat by interaction output character or image.Basic process can be divided into seven steps such as charging, exposure, development, transfer printing, photographic fixing, the electricity that cleans, disappears.At first, photosensitive drum surface is charged equably by charging roller.Laser scanner is launched the laser through ovennodulation that contains image information to photosensitive drums, forms and the electrostatic latent image for the treatment of that duplicating image is corresponding at photosensitive drum surface.Then, from the carbon dust of developer roll then be adsorbed on and make electrostatic latent image convert visual image on the photosensitive drum surface.Along with the rotation of photosensitive drums, replace to transfer roll at the visual image that photosensitive drum surface forms by carbon dust.Through the effect of transfer roll transfer voltage, visual image is transferred on the recording medium such as paper, with after after warm-up mill and backer roll carry out heating and pressurizing to the visual image on the recording medium, the visual image full solidification that carbon dust is formed is on recording medium.So basic imaging action has just been finished.

In above-mentioned print procedure, convert the electrostatic latent image on the photosensitive drums to visual image, must depend on the adsorbed carbon dust of developer roll.These carbon dusts are stored in the toner, and by the transport supply of powder feeding roller realization to developer roll.Developer roll is adsorbed on its surface by Electrostatic Absorption effectiveness with carbon dust, and when when keeping the powder delivery cutter of Elastic Contact with developer roll, the carbon dust on developer roll surface is wipeed off equably to suitable thickness.This shows that utilizing the control of powder delivery cutter and making the carbon dust layer that it is suitable that the developer roll surface has all even thickness of one deck is the good key of print quality.

Referring to Fig. 1 a to Fig. 1 d, existing a kind of powder delivery cutter, the elastic blade 2 ' that comprises support 1 ' and be fixed in the metal quality of support 1 ', this blade 2 ' adopts filming technology to be made, promptly, apply the thin layer 4 ' of the macromolecular material of the wear-resisting and insulation of one deck in blade 2 ' and developer roll 3 ' the contacted front, thereby reach the wearing quality that improves the powder delivery cutter and make carbon dust frictional electrification purpose more fully.On cross section perpendicular to the developer roll axis, only can see and be provided with thin layer 4 ' near developer roll 3 ' one side at blade 2 ', because developer roll 3 ' and the contacted position of powder delivery cutter are in the end of blade 2 ' cantilever, like this with regard to make in the rotation of developer roll 3 ' continuous high speed, apply be easy at the edge of the thin layer 4 ' on blade 2 ' surface damaged or break away from blade 2 ' because of friction.It is inhomogeneous to cause developer roll 3 ' to go up powder, occurs vertical lines on the original text face that prints, and influences print quality.

The utility model content

The purpose of this utility model is to provide a kind of powder delivery cutter, with the powder delivery cutter damaged easily problem of its film when contacting with developer roll that solves existing band thin layer.

For achieving the above object, the utility model provides a kind of powder delivery cutter, comprise elastic blade, this blade has fixed part that is used to be fixed and the bracketed part that stretches out from this fixed part, the outer end of this bracketed part has and is used for the contact portion that contacts with developer roll, when described contact portion has work towards the front of described developer roll, during work with the opposing back side of described developer roll and the end face that is connected the described front and the back side, be attached with the thin layer that can contact on the described front with described developer roll, wherein, described thin layer is simultaneously also attached on the described end face.

Powder delivery cutter of the present utility model is provided with thin layer on the surface of the contact portion that its blade contacts with developer roll, on this thin layer while front and end face attached to this contact portion, make the outward flange of thin layer away from this thin layer and the contacted perform region of developer roll, this structure that wraps up has also strengthened the adhesion of thin layer, has avoided the easy breakage of powder delivery cutter end after printing a period of time of existing band thin layer and the defective of perk.

Preferably, described thin layer is simultaneously also attached on the described back side, thereby further strengthened the adhesion of thin layer.Described thin layer can equate with width attached to the second portion on the described back side attached to the width of the first on the described front, also can be unequal.The width of described first and second portion can be 2mm～20mm.Described thin layer can equate with length attached to the second portion on the described back side attached to the length of the first on the described front.

Described thin layer can be for applying rete, soaking coating or spray-on coating.

Described blade is preferably the planar shaped lamellar body.

The thickness of described thin layer can be 0.02mm～1mm, is to be 0.02mm～0.1mm better.

Described blade is sheet metal or nonmetallic slices, and described sheet metal is copper sheet or stainless steel substrates.

Described powder delivery cutter also comprises the blade support that is connected with described fixed part, and this blade support is that welding, screwing or viscose glue are connected with the type of attachment of described fixed part.

Description of drawings

Fig. 1 a is the cross sectional representation of existing a kind of powder delivery cutter with thin layer.

Fig. 1 b is the A partial enlarged drawing of Fig. 1 a.

Fig. 1 c is a powder delivery cutter shown in Fig. 1 a and the synoptic diagram that cooperates of developer roll.

Fig. 1 d is the B partial enlarged drawing of Fig. 1 c.

Fig. 2 a is the cross sectional representation of first embodiment of the utility model powder delivery cutter.

Fig. 2 b is the C partial enlarged drawing of Fig. 2 a.

Fig. 2 c is a powder delivery cutter shown in Fig. 2 a and the synoptic diagram that cooperates of developer roll.

Fig. 2 d is the D partial enlarged drawing of Fig. 2 c.

Fig. 3 a is the cross sectional representation of second embodiment of the utility model powder delivery cutter.

Fig. 3 b is the E partial enlarged drawing of Fig. 3 a.

Fig. 3 c is a powder delivery cutter shown in Fig. 3 a and the synoptic diagram that cooperates of developer roll.

Fig. 3 d is the F partial enlarged drawing of Fig. 3 c.

Embodiment

Embodiment one is referring to Fig. 2 a to Fig. 2 d, the powder delivery cutter of present embodiment comprises the elastic blade 2 of support 1 and the stainless steel by being fixedly welded on support 1, this blade 2 has the fixed part 21 that is used to be fixed, from fixed part 21 outwardly directed bracketed parts 22, be formed at the thin layer 24 that is used for the contact portion 23 that contacts with developer roll 4 and is arranged on these contact portion 23 surfaces of bracketed part 22 outer ends, this thin layer 24 can be by applying film, technologies such as immersion or spraying are attached to the surface of this contact portion 23, the thickness t of this thin layer 24 can be 0.02mm～1mm, being to be 0.02mm～0.1mm better, for example is 0.08mm; The width W of this thin layer 24 can be 2mm～20mm, for example is 12mm.This blade 2 is the planar shaped lamellar body, and its fixed part 21, bracketed part 22 and contact portion 23 are one-body molded and in the same plane.When described contact portion 23 has work towards the front 231 of developer roll 4, during work with the opposing back side 232 of developer roll 4 and the end face 233 that is connected the front 231 and the back side 232, this thin layer 24 simultaneously attached to described positive 231 and described end face 233 on, make the outward flange of thin layer 24 away from this thin layer 24 and developer roll 4 contacted perform regions, this structure that wraps up has also strengthened the adhesion of thin layer 24, has avoided the easy breakage of powder delivery cutter end after printing a period of time of existing band thin layer and the defective of perk.

Embodiment two is referring to Fig. 3 a to Fig. 3 d, the powder delivery cutter of present embodiment comprises support 1 and is adhesively fixed in the copper elastic blade 3 of support 1, the formation of this blade 3 is identical with the blade 2 of the foregoing description one, have the fixed part 31 that is used to be fixed equally, from fixed part 31 outwardly directed bracketed parts 32, be formed at the thin layer 34 that is used for the contact portion 33 that contacts with developer roll 4 and is arranged on these contact portion 33 surfaces of bracketed part 32 outer ends, this thin layer 34 can be by applying the surface of technologies such as film, immersion or spraying attached to this contact portion 33.When described contact portion 33 has work towards the front 331 of developer roll 4, during work with the opposing back side 332 of developer roll 4 and the end face 333 that is connected the front 331 and the back side 332, this thin layer 44 attached on described positive 331, the end face 333 and the back side 332, forms the form that three bread are wrapped up in simultaneously.

Described thin layer 34 is attached to the width W of the first on the front 331 ₁With width W attached to the second portion on the back side 332 ₂Can equate, also can be unequal.The width W of described first ₁Width W with second portion ₂Can be 2mm～20mm, for example be 15mm.Described thin layer 34 is attached to the length (extending along the direction perpendicular to paper) of the first on positive 331 and equal in length attached to the second portion on the back side 332.The thickness t of described thin layer 34 can be 0.02mm～1mm, is better to be 0.02mm～0.1mm, and for example be 0.05mm.

More than enumerated several embodiment of the present utility model, it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to the utility model protection domain.Should be noted that, for the person of ordinary skill of the art, under the prerequisite that does not break away from inventive concept of the present utility model, can also make some distortion and improvement, for example: blade be not limited to welding of the foregoing description and bonding mode being connected of support, can also utilize the fixing method of screw and pressing plate to realize.The utility model powder delivery cutter can not comprise holder part, and the fixed part of powder delivery cutter can directly be fixed on the cartridge framework by screw etc.The material of blade also is not limited to stainless steel substrates and the copper sheet in the foregoing description, obviously, can also adopt the elastic sheet of other metals or non-metallic material to realize.More than these distortion and improving all within protection domain of the present utility model.

Claims

1. powder delivery cutter, comprise elastic blade, this blade has fixed part that is used to be fixed and the bracketed part that stretches out from this fixed part, the outer end of this bracketed part has and is used for the contact portion that contacts with developer roll, when described contact portion has work towards the front of described developer roll, during work with the opposing back side of described developer roll and the end face that is connected the described front and the back side, be attached with the thin layer that can contact with described developer roll on the described front, it is characterized in that: described thin layer is simultaneously also attached on the described end face.

2. powder delivery cutter according to claim 1 is characterized in that: described thin layer is simultaneously also attached on the described back side.

3. powder delivery cutter according to claim 2 is characterized in that: described thin layer is to equate or unequal attached to the width of the first on the described front and width attached to the second portion on the described back side.

4. powder delivery cutter according to claim 3 is characterized in that: the width of described first and second portion is 2mm～20mm.

5. powder delivery cutter according to claim 2 is characterized in that: described thin layer equates with length attached to the second portion on the described back side attached to the length of the first on the described front.

6. according to each described powder delivery cutter of claim 1 to 5, it is characterized in that: described thin layer is for applying rete, soaking coating or spray-on coating.

7. according to each described powder delivery cutter of claim 1 to 5, it is characterized in that: described blade is the planar shaped lamellar body.

8. according to each described powder delivery cutter of claim 1 to 5, it is characterized in that: the thickness of described thin layer is 0.02mm～0.1mm.

9. according to each described powder delivery cutter of claim 1 to 5, it is characterized in that: described blade is sheet metal or nonmetallic slices, and described sheet metal is copper sheet or stainless steel substrates.

10. according to each described powder delivery cutter of claim 1 to 5, it is characterized in that: this powder delivery cutter also comprises the blade support that is connected with described fixed part, and this blade support is that welding, screwing or viscose glue are connected with the type of attachment of described fixed part.