CN101221382A - Magnetic particle carrying device, and developing unit, process cartridge, and image forming apparatus using the same, and surface treatment method of the same - Google Patents

Abstract

A magnetic particle carrying device includes a magnetic field generator and a hollow cylindrical structure. The magnetic field generator generates a magnetic field. The hollow cylindrical structure encases the magnetic field generator and attracts magnetic particles on an external surface of the hollow structure using the magnetic field. The external surface of the hollow cylindrical structure is provided with a plurality of elliptical depressions. The depressions include first type depressions and second type depressions. A long axis of a first type of elliptical depression is substantially extending in an axial direction of the hollow cylindrical structure, and a long axis of a second type of elliptical depression is substantially extending in a circumferential direction of the hollow cylindrical structure. The external surface of the hollow cylindrical structure has more elliptical depressions of the second type than elliptical depressions of the first type.

Description

Magnetic particle carrying device, developing cell, handle box, use its imaging device, with and surface treatment method

The cross reference of related application

The 2007-003425 number application of Japanese patent application that the application submitted to Jap.P. office based on January 11st, 2007, and the Japanese patent application that on April 24th, 2007 submitted to applies for being right of priority that its full content is incorporated by reference herein for 2007-113883 number.

Technical field

The disclosure is usually directed to a kind of magnetic particle carrying device such as developer carrier, developing cell, handle box, the imaging device of use magnetic particle carrying device, and because the surface treatment method of magnetic particle carrying device.

Background technology

Typically, imaging device comprises photosensitive drums and has the magnetic particle carrying device (as developer carrier) of hollow structure (as development sleeve).In this type of imaging device, developer is carried on the outside surface of development sleeve and is transferred to photosensitive drums then to be used for imaging operation.

This type of development sleeve has and is subjected to the outside surface that surperficial roughening is handled, and for example outer surface sandblast or form groove thereon is so that developer can be carried on the development sleeve reliably.

And development sleeve has the outside surface that forms several depressions randomly, and each depression has approximate ellipse when observing from the top.This type of depression in the development sleeve can be divided into two types according to ellipse depression long axis direction.In first kind depression, oval depression long axis direction aligns with the axle of development sleeve is approximate, and in second types of recesses, the depression long axis direction aligns with the circumferencial direction of development sleeve is approximate, that is, and and direction perpendicular to axial direction.Every type depression number is unequal, and the first kind is more.

When the development sleeve with hollow structure is subjected to above-mentioned blasting treatment when forming recess and protuberance on the outer surface, this type of recess is relative with protuberance less.Therefore, under duplicate printing operation, this type of recess and protuberance are developed agent etc. and little by little scrape smooth or near flat, reduce the amount of the developer that development sleeve can transmit gradually and picture quality is caused negative effect, and for example, the result causes the image that blurs.

The amount of the developer that development sleeve can transmit can increase by forming bigger recess and protuberance through sandblast once more on the outside surface of development sleeve.Yet this approach has shortcoming.For example, form the required stronger sandblast meeting of bigger recess and protuberance and make the development sleeve self-deformation, its rotation is caused negative effect.Development sleeve can not accurately rotate and can cause the gap fluctuation that is located between development sleeve and the photosensitive drums, can cause causing then to the supply instability of the developer of photosensitive drums the disappearance of appropriate toner density on the formed image like this.

Perhaps, as mentioned above, can on the outside surface of development sleeve, form groove.This type of groove is greater than the recess and the protuberance that form by above-mentioned blasting treatment, also greater than the particle that is included in the magnetic carrier in the developer.The large-size of groove can prevent that recess that itself and sandblast form is the same and be developed agent up hill and dale or wearing and tearing quickly, and therefore the amount of the development sleeve developer that can transmit can not reduce in time.

Yet, may have the uneven distribution of developer on the outside surface of this type of development sleeve, because groove compares the part portability of no groove and transmits more developer, can cause uneven toner density on the final image that produces like this.

With respect to the oval depressions on the above-mentioned outside surface that is formed on development sleeve, they greater than or be deeper than the depression that traditional sandblast forms.Therefore, developer this oval depression of unlikely wearing and tearing, and the therefore amount of the portable developer of the development sleeve sustainable generation of image that can not reduce and have suitable toner density in time.

And because this depression can be formed on the outside surface of development sleeve randomly, developer can be used as integral body and is carried at randomly on the development sleeve, this means that developer can be used as integral body and is attached to development sleeve equably.Therefore, this type of development sleeve may command finally forms the image color inequality of image.

And, as mentioned above, depression on the development sleeve outside surface is included in the upwardly extending first kind depression of development sleeve axle, and second types of recesses of extending on the development sleeve circumferencial direction, and the number that the first kind caves on the outside surface is greater than second types of recesses.Therefore, developer can axially being extracted on the development sleeve along development sleeve.Therefore, even the development sleeve rotation, the developer that is extracted also unlikely drops from development sleeve.Therefore, oval depression portability such as the as many developer of above-mentioned groove.

Yet this type of depression in the development sleeve comprises the less relatively depression of aiming at circumferencial direction development sleeve of number.Therefore, the adhesion density of the developer on the circumferencial direction of development sleeve (or amount) reduces or is inhomogeneous, and the image color inequality in the paper transmission direction can't be controlled or avoid effectively.Must, and compare the easier resolution of image color inequality in the paper transmission direction perpendicular to the image color inequality on the paper width direction of paper transmission direction.

Consider this background, desired is the method or the equipment of the image color inequality in the transmission direction of may command paper.

Summary of the invention

The invention provides a kind of magnetic particle carrying device that comprises magnetic field generator and hollow cylindrical structure.Magnetic field generator produces magnetic field.Hollow cylindrical structure surrounds magnetic field generator and uses on the outside surface of the hollow structure that magnetic field is attracted to magnetic-particle.The outside surface of hollow cylindrical structure is provided with a plurality of oval depressions.Depression comprises the first kind depression and second types of recesses.The major axis of the oval depression of the first kind is approximate along the extending axially of hollow cylindrical structure, and the approximate circumferencial direction along hollow cylindrical structure of the major axis of the oval depression of second type extends.The oval depression of second type that the outside surface of hollow cylindrical structure has is more than the oval depression of the first kind.

The present invention also provides a kind of latent image carrier that comprises, charger, register, and the imaging device of developing cell.Latent image carrier carries sub-image thereon.Charger is to the surface charging of latent image carrier.Register is configured to write down sub-image on latent image carrier.Developing cell uses magnetic particle carrying device with developer sub-image to be developed.Magnetic particle carrying device comprises magnetic field generator and hollow cylindrical structure.Magnetic field generator produces magnetic field.Hollow cylindrical structure surrounds magnetic field generator and will use on the outside surface of the hollow structure that the magnetic field magnetic-particle is attracted to.The outside surface of hollow cylindrical structure is provided with a plurality of oval depressions.Depression comprises the first kind depression and second types of recesses.Approximate the extending axially of the major axis of the oval depression of the first kind along hollow cylindrical structure, the approximate circumferencial direction along hollow cylindrical structure of the major axis of the oval depression of second type extends, and the oval depression of second type that the outside surface of hollow cylindrical structure has is more than the oval depression of the first kind.

The present invention also provides a kind of method of surface of roughening target object.This method comprises generation and compresses.Produce step and around target object, produce the magnetic field that rotates.Compaction step is pressed to a plurality of cylindrical abrasive particles on the outside surface of target object with the effect of the rotating magnetic field of the frequency with 200Hz to 400Hz.

Description of drawings

After having read following description in conjunction with the accompanying drawings, can become easily to the more complete evaluation of the present disclosure and the acquisition and the understanding of characteristic and advantage and other target, accompanying drawing is as follows:

Figure 1 shows that cut-open view according to the magnetic particle carrying device of illustrative examples;

Figure 2 shows that the skeleton view of hollow structure of the magnetic particle carrying device of Fig. 1;

Figure 3 shows that the unfolded surface image views of hollow structure of the magnetic particle carrying device of Fig. 1, wherein have oval-shaped depression and be included in the first kind depression that hollow structure is axially gone up aligning, and second types of recesses of on the hollow structure circumferencial direction, aiming at, wherein the number of first kind depression is greater than second types of recesses;

Figure 4 shows that the synoptic diagram of outside surface of the hollow structure of Fig. 3;

Figure 5 shows that the unfolded surface image views of hollow structure of the magnetic particle carrying device of Fig. 1, wherein have oval-shaped depression and be included in the first kind depression that hollow structure is axially gone up alignment, and second types of recesses of on the hollow structure circumferencial direction, aliging, wherein the number of second types of recesses caves in greater than the first kind;

Figure 6 shows that the synoptic diagram of outside surface of the hollow structure of Fig. 5;

Figure 7 shows that the cut-open view of the magnetic particle carrying device of the hollow structure that uses Fig. 3, wherein the outstanding polymeric chain of developer is formed on the outside surface of magnetic particle carrying device;

Figure 8 shows that another cut-open view of the magnetic particle carrying device of the hollow structure that uses Fig. 5, wherein the outstanding polymeric chain of developer is formed on the outside surface of magnetic particle carrying device;

Figure 9 shows that the cut-open view of the magnetic-particle that is used for developer;

Figure 10 shows that according to the developing cell of illustrative examples and the cut-open view of handle box;

Figure 11 shows that cut-open view according to the imaging device of illustrative examples;

Figure 12 shows that the outside surface that is used for the hollow structure of Fig. 2 carries out the skeleton view of the surface treatment machine that surperficial roughening handles;

Figure 13 shows that the cut-open view of the surface treatment machine that is cutd open along the line 2-2 of Figure 12;

Figure 14 shows that the skeleton view of the magnetic abrasive grain in the surface treatment machine that is used in Figure 12;

Figure 15 shows that the stretch-out view of the magnetic abrasive grain of the Figure 14 that is cutd open along the line 3-3 of Figure 14;

Figure 16 shows that the schematic cross sectional views of magnetic abrasive grain and the hollow structure in the surface treatment machine of Figure 12, handled, wherein magnetic abrasive grain rotatably when the periphery of hollow structure moves around its center rotation;

Figure 17 shows that the schematic cross sectional views of magnetic abrasive grain and hollow structure, wherein magnetic abrasive grain is pressed on the outside surface of hollow structure; And

Figure 18 shows that the cut-open view of the depression that has elliptical shape and aim at the circumferencial direction of hollow structure.

Accompanying drawing is intended to illustrate illustrative examples of the present invention and has no intention to limit its scope.Unless stated otherwise, accompanying drawing should not drawn in proportion, and same or analogous reference number is represented same or analogous parts in different views.

Embodiment

Now illustrative examples of the present invention is described.Be used for describing various elements, parts although should note as the word of the first, the second grade, the zone, these elements should be understood in layer and/or cross section, parts, zone, layer and/or cross section are not therefore and restricted, because these words are relative, that is, just be used for distinguishing an element, parts, the zone, layer and/or cross section.Thereby, for example, under the prerequisite that does not deviate from aim of the present invention, first element hereinafter described, parts, zone, but layer or also called after second element of cross section, parts, zone, layer or cross section.

In addition, should notice that term used herein just is used for describing certain embodiments rather than restriction the present invention.Thereby, for example, unless specifically stated otherwise, singulative used herein " ", " one ", " this " also can comprise plural form.And, when word " comprises " and/or " comprising " when being used in this explanation, be used for the feature clearly stated, integer, step, operation, element, and/or the existence of parts, but do not get rid of one or more further features, integer, step, operation, element, and/or the existence of parts or additional.

And although in illustrated described illustrative examples, because the concrete term of clear use, the disclosure is not restricted to the concrete term of selection like this, should recognize that each concrete element comprises the technical equivalents thing that all are worked in a similar manner.

With reference to the accompanying drawings, description is described the magnetic particle carrying device (for example, development sleeve) according to an illustrative examples.

Existing main reference Fig. 1 to 6,10, and 18 pairs of magnetic particle carrying devices according to illustrative examples are described.

As shown in Figure 1, for example, the developer roll 115 that is used as magnetic particle carrying device comprises center bar 134, magnetic roller 133, and development sleeve 132.The setting of center bar 134 makes its longitudinal direction and the parallel (see figure 10) of the longitudinal direction of photosensitive drums 108, and is fixed to the shell 125 of developing cell 113 as shown in figure 10 in non-rotatable mode.

Magnetic roller 133 as magnetic field generator can be made and be shaped to cylindrical by magnetic material.Magnetic roller 133 is attached with a plurality of fixing magnetic pole (not shown).Magnetic roller 133 is fixed to the periphery of center bar 134, and therefrom can not be around the rotation of the axle center of center bar 134.

Each fixed magnetic pole can be to have the magnet of stock shape and be attached to magnetic roller 133.Fixed magnetic pole along the longitudinal extension of magnetic roller 133 (being developer roll 115) is established on whole length of left magnetic roller 133.For example, so the magnetic roller 133 of structure by coated in development sleeve 132 with columniform hollow structure.

Figure 10 is described below with reference to, in the fixed magnetic pole one face with stirring bolt 118, and as the extraction magnetic pole on the development sleeve 132 that developer is extracted into developer roll 115.Still Figure 10 is described below with reference to, and another fixed magnetic pole and photosensitive drums 108 are faced, and as the development magnetic pole.The development magnetic pole forms magnetic field between developer roll 115 and photosensitive drums 108.

Fixed magnetic pole can be used for and will be made and be included in the outside surface that magnetic carrier 135 (see figure 9)s in developer 126 (see figure 8)s are attracted to development sleeve 132 by magnetic-particle.Magnetic carrier 135 can be stacked on another along one in the magnetic field that fixed magnetic pole produces, and can form the polymeric chain (seeing Fig. 7 and 8) of magnetic carrier 135 thus on the outside surface of development sleeve 132 with the protrusion form.The word " magnetic carrier " that is used for the disclosure has the implication of single or multiple magnetic-particles.Therefore, magnetic carrier 135 or magnetic carrier 135 can be used in the disclosure.

Then, the toner particle that is included in the developer 126 attracted on the protrusion polymeric chain of magnetic carrier 135.Therefore, attracted on the outside surface of development sleeve 132 under the effect of the magnetic force of developer 126 left magnetic rollers 133.

As shown in Figure 2, for example, development sleeve 132 has cylindrical.Development sleeve 132 is therein coated with magnetic roller 133, and can be around the rotation of the center of development sleeve 132.Therefore, when development sleeve 132 around its when rotation axle, the inside surface of development sleeve 132 and each fixed magnetic pole are faced continuously.Development sleeve 132 can be by nonmagnetic substance such as aluminium alloy, and stainless steel (SUS) etc. is made.As described below, the outside surface of development sleeve 132 can be handled by surface treatment machine 1 (seeing Figure 12) so that outside surface is the surface of roughening preferentially.

As the base-material of development sleeve 132, aluminium alloy is with its machinability and lightweight and preferentially selected for use.When selecting aluminium alloy for use, for example for use, A6063 should be selected preferentially, A5056, the aluminium alloy of A3003 standard as the base-material of development sleeve 132.When selecting SUS (stainless steel) for use, for example, SUS303 should preferentially be selected for use, SUS304, or SUS316.

For example, development sleeve 132 can have given external diameter such as 17mm to 18mm and given axial length such as 240mm to 350mm.The size of development sleeve 132 can be changed into arbitrary value according to design concept.The outside surface of development sleeve 132 has the given surfaceness that can change according to the surface element of development sleeve 132.For example, the degree of depth that is formed on the depression on the development sleeve 132 can deepen from central part each end to development sleeve 132 vertically gradually.

And, shown in Fig. 3 to 6, have several tops on the outside surface of development sleeve 132 and be considered as oval-shaped depression 139 from development sleeve 132.Shown in Fig. 3 to 6, this type of depression 139 is formed on the outside surface of development sleeve 132 randomly.Shown in Fig. 3 to 6, depression 139 can have two types depression, that is, and and the first depression 139a (seeing Fig. 3 and 4) and the second depression 139b (seeing Fig. 5 and 6).

In the first depression 139a, oval-shaped major axis approximate with the axially aligning of development sleeve 132.For example, oval-shaped major axis axially the having at ± 45 ° of the first depression 139a with respect to development sleeve 132 with interior angle.

In the second depression 139b, oval-shaped major axis is approximate to be aimed at the circumferencial direction of development sleeve 132.For example, the oval-shaped major axis of the second depression 139b with respect to the circumferencial direction of development sleeve 132 have ± 45 ° with interior angle, wherein the circumferencial direction of development sleeve 132 is the sense of rotation of development sleeve 132 in the disclosure.In illustrative examples, the number of the second depression 139b that development sleeve 132 has is greater than the first depression 139a.And for example, the depression 139 with elliptical shape has given long axis length such as 0.05mm to 2mm, and given minor axis length such as 0.02mm to 1mm.Shown in Fig. 3 to 6, the axial and circumferencial direction of development sleeve 132 is orthogonal.

And as shown in figure 18, depression 139 has from the outstanding peripheral end portion 200a of the outside surface of development sleeve 132 (promptly cave in 139 back edge), and the first imaginary line L1 and the second imaginary line L2 are from the deep 200c of its extension (promptly cave in 139 bottom).The first imaginary line L1 is from caving in 139 deep 200c extending radially outwardly along development sleeve 132.The second imaginary line L2 extends out to the peripheral end portion 200a of depression 139 from deep 200c, wherein when magnetic-particle is attached on the development sleeve 132 peripheral end portion 200a be positioned at about the depression 139 of development sleeve 132 sense of rotation (shown in the arrow of Figure 18) the position of back.As shown in figure 18, the angle of the first and second imaginary line L1 and L2 formation is α.In illustrative examples, the mean value of angle α preferably is located in 45 °.If angle α is located in 45 °, then deep 200c is positioned at the position of the peripheral end portion 200a of more close depression 139.

And still as shown in figure 18, depression 139 has imaginary line section La and radius section Lb.The rotation center P of imaginary line section La autography sleeve 132 extends to the peripheral end portion 200a of depression 139.Radius section Lb is half of development sleeve 132 external diameters.In illustrative examples, imaginary line section La is greater than radius section Lb, and preferentially, imaginary line section La and radius section Lb have the relation of following " 20 μ m 〉=La-Lb＞5 μ m ".When satisfying this and concern, peripheral end portion 200a is preferably outwards outstanding from the outside surface of development sleeve 132.

Introduce below developer 126 is attracted to process on the outside surface of developer roll 115.

As shown in figure 10, in developing cell 113, developer roll 115 and developer 126 face one another with given gap, and wherein developer roll 115 is as developer carrier, and developer 126 comprises magnetic carrier 135 and the toner particle as magnetic-particle.

As mentioned above, developer roll 115 coated be attached with the magnetic roller 133 of said extracted magnetic pole.As mentioned above, extract magnetic pole and on the outside surface of development sleeve 132 (or developer roll 115), produce magnetic force.Under the effect of this magnetic force, the developer 126 in second chamber 121 of container 117 (see figure 10)s attracted on the outside surface of development sleeve 132.

And above-mentioned development magnetic pole produces magnetic force on the outside surface of development sleeve 132 (or developer roll 115).Under the effect of this magnetic force, the development magnetic pole forms a magnetic field between development sleeve 132 and photosensitive drums 108.The development magnetic pole can be at the Magnetic brush that is used to form magnetic carrier 135 under the effect in magnetic field so that developer 126 attracted on the outside surface of development sleeve 132 and by Magnetic brush is transferred on the photosensitive drums 108 from developer roll 115.

And, between extraction magnetic pole and development magnetic pole, a fixed magnetic pole is set at least.This at least one fixed magnetic pole produces magnetic force and is transferred to the position of facing with photosensitive drums 108 so that be used to the developer 126 of development treatment on the outside surface of development sleeve 132 (or developer roll 115), or is used for transferring to container 117 with being developed the used developer 126 of processing from photosensitive drums 108 by this magnetic force that this at least one fixed magnetic pole produces.

Introduce the outstanding polymeric chain that is formed on the developer 126 on the development sleeve 132 below with reference to Fig. 7 and 8.Particularly, the outstanding polymeric chain of developer 126 can be formed between the first depression 139a and the second depression 139b in a different manner.As mentioned above, the first depression 139a has elliptical shape, and along the extending axially of development sleeve 132, the second depression 139b has elliptical shape, and extends along the circumferencial direction of development sleeve 132.

Figure 7 shows that the state of cut-open view of the developer roll 115 of the outstanding polymeric chain with developer 126, wherein the number of the first depression 139a is greater than the number of the second depression 139b.Figure 8 shows that another state of cut-open view of the developer roll 115 of the outstanding polymeric chain with developer 126, wherein the number of the second depression 139b is greater than the number of the first depression 139a.

Shown in Fig. 7 and 8, the effective length of the depression 139 of portability or maintenance developer 126 is different between the two states shown in Fig. 7 or 8.Particularly, along big among effective length ratio Fig. 7 of the depression 139 of the circumferencial direction of the developer roll among Fig. 8 115 (as magnetic particle carrying device), wherein as mentioned above developer roll 115 in Fig. 7, have greater number first the depression 139a, in Fig. 8, have greater number second the depression 139b.

Because developer 126 closely in the depression 139 attached to development sleeve 132, becomes bigger in the situation of adhesion density in Fig. 8 of the developer 126 on the circumferencial direction of development sleeve 132.And the outstanding polymeric chain of developer 126 can more be formed uniformly in each second depression 139b.

As mentioned above, in illustrative examples, the outside surface of development sleeve 132 comprises several depressions with elliptical shape 139, and the 139 second depression 139b numbers that comprise that wherein cave in are greater than the first depression 139a.Therefore, the magnetic-particle that is included in the developer 126 can be on the outside surface that is attracted to development sleeve 132 on the circumferencial direction of development sleeve 132 equably.And this magnetic-particle can attracted on the outside surface of development sleeve 132 with the density on the circumferencial direction of bigger development sleeve 132 as mentioned above.

Therefore, developer roll 115 can be supplied to developer 126 circumferencial direction of photosensitive drums 108 more equably.In other words, developer 126 can be supplied to the sense of rotation of photosensitive drums 108 more equably, the wherein sense of rotation of photosensitive drums 108 and transfer such as paper, and the direction of transfer of intermediate transfer belt etc. is aimed at.Therefore, toner image can be developed on the photosensitive drums 108 by the unevenness that reduces image color, and thus, having higher-quality image can be created on the transfer.

And, have elliptical shape, be formed on depression 139 on the outside surface of development sleeve 132 and compare with the recess that forms by traditional blasting treatment and have bigger size, wherein caving in 139 has the long axis length of 0.05mm to 2mm, and the minor axis length of 0.02mm to 1mm.Therefore, compare with traditional blasting treatment, this oval depressions of the more impossible wearing and tearing depression 139 of developer 126, and the amount of development sleeve 132 portable developers 126 can not reduce and image with suitable toner density produces sustainably because of the time.The amount of development sleeve 132 portable developers 126 can be referenced as the transmittability (or transmission quantity) of the developer 126 of development sleeve 132.

And as above described with reference to Figure 18, the depression 139 on development sleeve 132 outside surfaces comprises deep 200c and peripheral end portion 200a, and the wherein more close sense of rotation with respect to development sleeve 132 of deep 200c is positioned at the peripheral end portion 200a of the back of depression 139.

In illustrative examples, as mentioned above, from deep 200c at the outward extending in the radial direction first imaginary line L1 of development sleeve 132 with extend out to the second imaginary line L2 shape of peripheral end portion 200a of depression 139 from deep 200c at 45 with interior angle [alpha].

Therefore, when developer 126 by time depression 139 can scoop up magnetic-particle from second chamber, 121 (see figure 10)s are carried on the development sleeve 132, and cave in and 139 magnetic carrier 135 can be carried reliably or remains on wherein.Therefore, magnetic carrier 135 can be remained on the outside surface of development sleeve 132 more reliably, and thus, developer 126 also can be remained on the outside surface of development sleeve 132 more reliably.Therefore, the amount of development sleeve 132 portable developers 126 can not reduce and image with suitable toner density produces sustainably because of the time.

And, in illustrative examples, the degree of depth of depression 139 can be made as the better level of hold facility that less relatively value can be kept developer 126 simultaneously, thus, be applied in that can be set up ground with the processing energy (as mechanical force) that forms depression 139 on the outside surface of development sleeve 132 less, the distortion of may command development sleeve 132 like this (as the axle displacement, inside/outside directly changes, and sleeve-shaped is subside).Therefore, the precision manufacturing that development sleeve 132 can be higher, and more high precision rotation, thus, having higher-quality image can produce with higher toner density level.

And the depression 139 on development sleeve 132 outside surfaces can have peripheral end portion 200a on the back location with respect to the sense of rotation of development sleeve 132, and wherein peripheral end portion 200a can be outstanding from development sleeve 132 outside surfaces.Therefore, it is relatively large to become ground dimensionally from the zone that deep 200c extends to the peripheral end portion 200a the depression 139, magnetic carrier 135 is carried more reliably or remains on the outside surface of development sleeve 132, developer 126 is carried more reliably or remains on the outside surface of development sleeve 132.Therefore, the amount of development sleeve 132 portable developers 126 can not reduce and image with suitable toner density produces sustainably because of the time.

And, 139 being formed on randomly on the outside surface of development sleeve 132 because cave in, developer 126 is attracted on the outside surface of development sleeve 132 randomly, and thus, developer 126 is attracted on the outside surface of development sleeve 132 as a whole equably.Therefore, developer 126 can be sent on the development sleeve 132 equably, and developer 126 can be fed on the photosensitive drums 108 by development sleeve 132 equably thus, and having higher-quality image thus can produce with the good level of toner density.

Introduce the developing cell 113 that uses above-mentioned developer roll 115 below with reference to Figure 10.As shown in figure 10, developing cell 113 comprises developer feeding chamber 114, shell 125, developer roll 115, and doctor blade 116.

Developer feeding chamber 114 comprises container 117, and a pair of stirring bolt 118 that is used to stir developer 126.Container 117 has substantially the length that the length with photosensitive drums 108 is complementary.And container 117 is provided with the separates walls 119 along the longitudinal extension of container 117.Separates walls 119 is divided into first chamber 120 and second chamber 121 with container 117.And first and second chamber 120 and 121 interconnects by its end.

In container 117, developer 126 is contained in first and second chamber 120 and 121.Developer 126 comprises toner particle and the magnetic carrier of being made by the magnetic-particle (see figure 9) 135.New toner particle is supplied to the end away from first chamber 120 of developer roll 115 in good time mode.Toner particle can be the fine globular particle of preparing by emulsion polymerisation process or suspension polymerization.Toner particle also can be prepared by breaking method, wherein mixes with dyestuff or pigment and the synthetic resin that disperses can be pulverized.For example, toner particle has the average particulate diameter of 3 μ m to 7 μ m.

The stirring bolts 118 that are respectively first and second chamber 120 and 121 settings have and container 117, developer roll 115, and the parallel longitudinal of photosensitive drums 108 is vertical.Can stir toner particle and magnetic carrier 135 around the stirring bolt 118 of its center rotation, and transmit developer 126.And the stirring bolt 118 in first chamber 120 is sent to the other end with developer 126 from an end, and the stirring bolt 118 in second chamber 121 transmits end so far with developer 126 from the other end.

In developer feeding chamber 114, the toner particle that is supplied to an end in first chamber 120 is being stirred the other end that is transferred into first chamber 120 simultaneously with magnetic carrier 135, and toner particle of being stirred and magnetic carrier 135 are transferred into second chamber 121 from the other end in first chamber 120.Then, in developer feeding chamber 114, toner particle and magnetic carrier 135 are sent to second chamber 121 with stirring, and are supplied to the outside surface of developer roll 115.

The shell 125 that is attached to the container 117 in developer feeding chamber 114 can surround the developer roll 115 with container 117.And shell 125 has the opening 125a in the face of photosensitive drums 108.

Form columniform developer roll 115 and be located between second chamber 121 and the photosensitive drums 108, and near opening 125a.Developer roll 115 be arranged in parallel with photosensitive drums 108 and container 117.Developer roll 115 is faced with given gap and photosensitive drums 108.Developer roll 115 forms the district 131 of developing in the crack district during this time with photosensitive drums 108, and it is toner image with the latent electrostatic image developing that will be formed on the photosensitive drums 108 that the toner particle in the developer 126 is transferred and adheres to photosensitive drums 108 at this.

The doctor blade 116 that is attached on the shell 125 is located at the outside of the outside surface of development sleeve 132 with given gap, and can be near photosensitive drums 108 in developing cell 113.The developer 126 that doctor blade 116 strikes off on the outside surface that is supplied to development sleeve 132 is controlled at given level with the amount with developer 126, the developer 126 of specified rate can be transferred to reliably the district 131 of developing thus.

Developer 126 is sent to the development district 131 in the developing cell 113 as follows.

In the district 131 of developing, toner particle and magnetic carrier 135 are stirred in developer feeding chamber 114, attracted on the outside surface of development sleeve 132 under the effect of the fixed magnetic pole of developer 126 in developer roll 115 that is stirred.Along with the rotation of development sleeve 132, this developer that is attracted 126 is transferred into the district 131 of developing.Behind the thickness with doctor blade 116 control developers 126, developer 126 is adhered on the photosensitive drums 108.Handle thus, the electrostatic latent image on the photosensitive drums 108 is developed agent 126 developments and is toner image.After this development treatment, the developer of staying on the developer roll 115 126 is eliminated and is recycled in the container 117.Developer 126 in these developers that are recovered 126 and second chamber 121 is stirred, and continues to serve as develop another width of cloth electrostatic latent image on the photosensitive drums 108 of developer then.

In illustrative examples, developing cell 113 usefulness developer rolls 115 are as the magnetic particle carrying device that developer 126 can be supplied to more equably the circumferencial direction of photosensitive drums 108.In other words, developer 126 can be supplied to the sense of rotation of photosensitive drums 108 more equably, the wherein sense of rotation of photosensitive drums 108 and transfer such as paper, and the direction of transfer of intermediate transfer belt etc. is aimed at.Therefore, by reducing the unevenness of image color, toner image can be developed on photosensitive drums 108, and the image that has better quality thus can produce on transfer.

Below with reference to Fig. 9 magnetic carrier 135 is described.As mentioned above, magnetic carrier 135 is contained in first and second chamber 120 and 121.For example, magnetic carrier 135 has the mean diameter of 20 μ m to 50 μ m.As shown in Figure 9, for example, magnetic carrier 135 comprises core 136, resinous coat 137, and alumina particle 138.The outside surface of core 136 is by resinous coat 137 coatings, and alumina particle 138 is dispersed in the resinous coat 137.

If magnetic carrier 135 has too small average particulate diameter (as less than 20 μ m), magnetic carrier 135 has littler magnetive attraction, this can cause the more weak magnetic attracting force to developer roll 115, developer roll 115 photosensitive drums 108 of more likely adhering thus, and this is not the phenomenon of expectation.

If magnetic carrier 135 has excessive average particulate diameter (as greater than 50 μ m), can form between the electrostatic latent image on magnetic carrier 135 and the photosensitive drums 108 than low-intensity magnetic field, this will cause relatively poor picture quality such as toner density inhomogeneous, the phenomenon that this neither expect.

For example, core 136 can be by forming spherical making as ferritic magnetic material.Resinous coat 137 is coated on the outside surface of core 136.Resinous coat 137 comprises resin such as cross-linked resin (as melamine resin and thermoplastic resin such as acrylic acid resin) and charging control agent.For example, this resinous coat 137 has elasticity and stronger viscosity.Alumina particle 138 has the external diameter greater than the thickness of resinous coat 137, and alumina particle 138 can be outstanding from the surface of resinous coat 137 thus.Alumina particle 138 remains in the resinous coat 137 by the viscosity of resinous coat 137.

In illustrative examples, developing cell 113 uses the developer 126 of the sphere with better level of the magnetic carrier 135 that comprises the average particulate diameter with 20 μ m to 50 μ m, and the image that has the toner density of better level thus can be produced.

Refer now to Figure 10 and introduce handle box.For example, each handle box 106Y, 106M, 106C, and 106K comprises box shell 111, charging roller 109, photosensitive drums 108, cleaning blade 112, and developing cell 113.

Box shell 111 can be pulled down from imaging device 101 (seeing Figure 11), and surrounds charging roller 109, photosensitive drums 108, cleaning blade 112, and developing cell 113.The outside surface of 109 pairs of photosensitive drums 108 of charging roller charges equably.The photosensitive drums of facing with given gap and developer roll 115 in developing cell 113 108 has cylindrical shape and can rotate around its center.

Be provided preferably with the gap of 0.1mm to 0.4mm between developer roll 115 (or development sleeve 132) and the photosensitive drums 108, wherein the outstanding polymeric chain of developer 126 can be supplied toner particle from development sleeve 132 to photosensitive drums 108 reliably, can produce the image with better quality thus.

If this gives fixed gap too small (as less than 0.1mm), can form strong magnetic field between development sleeve 132 and the photosensitive drums 108, can cause the transfer printing of magnetic carrier 135 like this to photosensitive drums 108, this is not the expectation phenomenon.

If this given excesssive gap (as greater than 0.4mm), can form weak magnetic field between development sleeve 132 and the photosensitive drums 108, can reduce the development capability of toner particle on the photosensitive drums 108 so undesirably, thereby and this can cause that than low-intensity magnetic field bigger edge effect causes not desired images quality such as uneven toner density in the image border.

Handle box 106Y, 106M, 106C, and 106K according to as described below to recording paper 107 transferred images.

As shown in figure 11, imaging device 101 comprises light writing unit 122.Illuminating laser beam is to form electrostatic latent image on the photosensitive drums 108 of light writing unit 122 in handle box 106 on photosensitive drums 108.The electrostatic latent image that use is supplied on the next toner particle development photosensitive drums 108 from developing cell 113.Then, toner image is transferred on the transfer belt 129, and further is transferred on the recording paper 107.After this toner image was transferred to recording paper 107, cleaning blade 112 was removed and is stayed photosensitive drums 108 lip-deep toner particle.

In illustrative examples, handle box 106 uses the developing cell 113 that developer 126 can be supplied to more equably the circumferencial direction of photosensitive drums 108.In other words, developer 126 can be supplied to the sense of rotation of photosensitive drums 108 more equably.Therefore, the amount of development sleeve 132 portable developers 126 can not reduce and image with suitable toner density produces sustainably because of the time.

Refer now to Figure 11 and introduce imaging device.Imaging device 101 can form yellow (Y) on recording paper 107, fuchsin (M), cyan (C), and the coloured image of black (K).Hereinafter, yellow, fuchsin, cyan reaches black and uses suffix letter Y respectively, M, C, and K represents.

As shown in figure 11, for example, imaging device 101 comprises paper feed unit 103, registration rollers 110, transfer printing unit 104, fixation unit 105, light writing unit 122, and handle box 106Y, 106M, 106C, and 106K.

For example, paper feed unit 103 is located at the bottom of imaging device 101.Paper feed unit 103 comprises carton 123 and feed-in roller 124.Carton 123 store recording paper 107, feed-in roller 124 is extruded into the top sheet in the carton 123.Feed-in roller 124 is fed into registration rollers 110 with recording paper 107.

The registration rollers 110 that is arranged on recording paper 107 transfer paths comprises roller 110a and 110b.Recording paper 107 in roller 110a and 110b clamping, and recording paper 107 is fed to transfer printing unit 104 and the secondary transfer roll 16 hereinafter introduced between the space.

For example, the transfer printing unit 104 that is located at 103 tops, paper feed unit comprises drive roll 128, driven voller 12, transfer belt 129, and primary transfer roller 130Y, 130M, 130C, and 130K.(not shown) such as motor drive drive roll 128, and driven voller 12 rotatably is supported in the imaging device 101.The transfer belt 129 that forms the endless belt is stretched by drive roll 128 and driven voller 12.Transfer belt 129 is advanced along assigned direction when drive roll 128 rotation.

Primary transfer roller 130Y, 130M, 130C, and 130K and each handle box 106Y, 106M, 106C, and transfer belt 129 in photosensitive drums 108 clampings of 106K.Transfer printing unit 104 is at primary transfer roller 130Y, 130M, 130C reaches the toner image that will be formed on the photosensitive drums 108 under the effect of 130K and is transferred on the transfer belt 129, and transfer belt 129 is being transferred to toner image on the recording paper 107 under the effect of secondary transfer roll 16 then.Then, recording paper 107 is transferred into fixation unit 105.

Fixation unit 105 comprises and is used for recording paper 107 is clamped in therebetween roller 105a and 105b.Roller 105a and 105b to recording paper 107 apply heat and pressure with the toner image photographic fixing on recording paper 107.

The light writing unit 122 that is attached to imaging device 101 is to the handle box 106Y that is recharged roller 109 uniform charging, 106M, and 106C, and emission of lasering beam on the outside surface of the photosensitive drums 108 of 106K are to form electrostatic latent image on photosensitive drums 108.

For example, handle box 106Y, 106M, 106C reaches 106K and is arranged between transfer printing unit 104 and the light writing unit 122, and can pull down from imaging device 101.For example, handle box 106Y, 106M, 106C, and 106K can arrange with tandem moor.

After above-mentioned imaging processing, band cleaning unit 15 is removed the toner particle of staying on the transfer belt 129, and toner particle is recycled in the useless toner bottle (not shown).

Above-mentioned secondary transfer roll 16 be employed with transfer belt 129 on the relative bias voltage of toner particle, so that toner image is transferred on the recording paper 107 from transfer belt 129.

When behind photographic fixing toner on the recording paper 107, distributing roller 24 is discharged recording paper 107 from imaging device 101.

In addition, imaging device 101 comprises storage Y, M, C, and the toner bottle 31 of K toner.Toner of all kinds can add to each handle box 106Y by toner transfer path (not shown) from toner bottle 31,106M, and 106C, and among the 106K.

Therefore, imaging device 101 forms image on recording paper 107, and this process is summarized as follows.When photosensitive drums 108 rotations, 108 chargings of 109 pairs of photosensitive drums of charging roller.Laser beam is irradiated on the photosensitive drums 108 to form electrostatic latent image.When electrostatic latent image arrived the development district 131 of developing cell 113, it was toner image that electrostatic latent image is developed by the developer 126 that is come by development sleeve 132 supplies.Toner image is transferred on the transfer belt 129 then, and then is transferred on the recording paper 107 that is sent by paper feed unit 103.Fixation unit 105 with image as the coloured image photographic fixing on recording paper 107.

In illustrative examples, imaging device 101 uses the developing cell 113 that can more equably developer 126 be supplied to the circumferencial direction of photosensitive drums 108.In other words, developer 126 can be supplied to the sense of rotation of photosensitive drums 108 more equably.Therefore, by reducing the unevenness of image color, toner image can be developed on photosensitive drums 108, and the image that has better quality thus can produce on transfer.Therefore, the amount of development sleeve 132 portable developers 126 can not reduce and image with suitable toner density produces sustainably because of the time.

Refer now to Figure 12 to 17 and introduce surface treatment machine and the magnetic abrasive grain be used for forming the depression with elliptical shape on the outside surface of hollow structure (as developer roll 115), wherein magnetic abrasive grain 65 is forced on the outside surface of hollow structure to form depression on hollow structure.

Shown in Figure 12 and 13, for example, surface treatment machine 1 comprises pedestal 3, and fixedly holding unit 4, solenoid mobile unit 5, removable holding unit 6, removable chuck unit 7, solenoid 8, container unit 9, collector unit 10, cooling unit 11, linear encoder 75, and control module 76.

Pedestal 3 forms tabular, and is installed in the floor in the factory, above the desk etc.Pedestal 3 has with horizontal direction keeps parallel upper surface.For example, pedestal 3 forms rectangle.

Fixedly holding unit 4 comprises a plurality of pillars 12, supports pedestal 13, up-right support 14, and cylindrical keeper 15, and keep chuck 16.For example, pillar 12 is erected on the pedestal 3.

Support that pedestal 13 forms plate shape, and be attached to the upper end of pillar 12.The up-right support 14 that forms plate shape is from supporting pedestal 13 outstanding.

Forming columniform cylindrical keeper 15 is attached to up-right support 14 and supports pedestal 13.Compare with up-right support 14, the central part of cylindrical keeper 15 more close pedestals 3 is placed, and the axle center of cylindrical keeper 15 is parallel to the direction shown in horizontal direction and the arrow X.Cylindrical keeper 15 holds the flange 51b of the first end 9a (hereinafter introducing) that is attached to container unit 9,51c, and 51d (hereinafter introducing).

Maintenance chuck 16 near cylindrical keeper 15 and 13 settings of support pedestal is attached to pedestal 3.Keep chuck 16 to clamp having first end 9a, be contained in container unit 19 in the cylindrical keeper 15 to keep the first end 9a of container unit 9.Fixedly holding unit 4 also keeps the first end 9a of container unit 9.

Solenoid mobile unit 5 comprises a pair of linear steering device 17, and solenoid is supported pedestal 18, and solenoid moves actuator 19.Linear steering device 17 comprises track 20 and slide block 21.Track 20 is installed on the pedestal 3.Form vertical (or arrow X) parallel placement of rectilinear track 20 and pedestal 3.Slide block 21 is supported on the track 20 on vertical (or arrow X) of track 20 slidably.In a pair of linear steering device 17, track 20 is gone up with the given distance layout of being separated by at the Width (hereinafter reference arrow Y) of pedestal 3.Mutually perpendicular arrow X and arrow Y are parallel to horizontal direction.

The solenoid that forms plate shape supports that pedestal 18 is attached to slide block 21.Solenoid supports that pedestal 18 has the upper surface that is parallel to horizontal direction.Solenoid supports pedestal 18 that solenoid 8 is kept thereon.

The solenoid that is attached to pedestal 3 moves actuator 19 and is used for mobile slidably solenoid support pedestal 18 on the arrow directions X.Solenoid mobile unit 5 is supported pedestal 18 and solenoid 8 by using solenoid to move actuator 19 mobile slidably solenoid on the direction of arrow Y.And for example, solenoid mobile unit 5 can change the translational speed of solenoid 8 in the scope of 0mm/s to 300mm/s.And, solenoid mobile unit 5 can be in the mobile range of about 600mm mobile solenoid 8.

Removable holding unit 6 comprises a pair of linear steering device 22, supports pedestal 23, the first actuators 24, the second actuators 25, mobile foundation 26, and bearing rotary unit 27, and keep chuck 28.

Linear steering device 22 comprises track 29 and slide block 30.Track 29 is installed on the pedestal 3.Form vertical (or arrow X) parallel placement of rectilinear track 29 and pedestal 3.Slide block 30 is supported on the track 29 on vertical (or arrow X) of track 29 slidably.A pair of linear steering device 22 is gone up with the given distance layout of being separated by at the Width (or direction shown in the arrow Y) of pedestal 3.

The support pedestal 23 that forms plate shape is attached to slide block 30.Support that pedestal 23 has the upper surface that is parallel to horizontal direction.First actuator 24 that is attached to pedestal 3 is used for moving slidably on the arrow directions X supports pedestal 23.

Be attached to and support second actuator 25 of pedestal 23 to be used for mobile slidably mobile foundation 26 on arrow Y direction.The mobile foundation 26 that forms plate shape has the upper surface that is parallel to horizontal direction.

Bearing rotary unit 27 comprises pair of bearings 31, medium altitude target supporter 32, CD-ROM drive motor 33, chuck cylinder 34.On the direction of arrow X be installed on the mobile foundation 26 for the spaced apart pair of bearings 31 of set a distance.

Medium altitude target supporter 32 can be made and form cylindrical by magnetic material.Can be by bearing 31 supported hollow target supporters 32 around its center rotation.The axle center of medium altitude target supporter 32 and the parallel placement of direction shown in the axle center of cylindrical keeper 15 or the arrow X.Medium altitude target supporter 32 has first end 32a (seeing Figure 13) that is inserted in the container unit 9 and the second end 32c (seeing Figure 12) that is arranged on mobile foundation 26 tops.As shown in figure 13, medium altitude target supporter 32 is inserted into and has in the columniform development sleeve 132.And the second end 32c of medium altitude target supporter 32 is fixed to the pulley 35 that places mobile foundation 26 tops.Pulley 35 and medium altitude target supporter 32 coaxial arrangement.

The CD-ROM drive motor 33 that is installed on the mobile foundation 26 has the output shaft that is attached to pulley 36.The output shaft of CD-ROM drive motor 33 has the axle center that is parallel to the arrow directions X.Timing belt (or endless belt) 37 stretched by pulley 35 and 36.

Chuck cylinder 34 comprises cylinder body 38 and chuck axis 39, and wherein cylinder body 38 is installed on the mobile foundation 26, and chuck axis 39 is located on the cylinder body 38 slidably.Forming columniform chuck axis 39 be arranged in parallel with direction shown in the arrow X.Chuck axis 39 and the 32 coaxial settings of medium altitude target supporter and by coated in medium altitude target supporter 32.Chuck axis 39 is provided with a plurality of chuck jaws 40 as a pair of chuck jaw.

Chuck jaw 40 is attached on the periphery of chuck axis 39 highlightedly.And chuck jaw 40 can be given prominence to by the periphery from medium altitude target supporter 32 on the external diameter direction of medium altitude target supporter 32.Chuck jaw 40 can change from the overhang on chuck axis 39 and the medium altitude target supporter 32.Chuck jaw 40 with given spacing distance be arranged in chuck axis 39 vertically on.When chuck axis 39 when cylinder body 38 moves, the overhang of chuck jaw 40 on chuck axis 39 and the medium altitude target supporter 32 increases.

When chuck axis 39 when cylinder body 38 moves, chuck jaw 40 is more outstanding from the periphery of chuck axis 39, chuck jaw 40 is extruded on the inside surface of development sleeve 132 thus, is attached on the periphery of medium altitude target supporter 32.Thus after the process, chuck axis 39, medium altitude target supporter 32 and development sleeve 132 are fixed together.At this moment, chuck axis 39, medium altitude target supporter 32, development sleeve 132, column 50 (will be described herein-after), and container unit 9 coaxial arrangement.

And, when the periphery of setting chuck jaw 40 relative medium altitude target supporters 32 when not giving prominence to condition, development sleeve 132 and medium altitude target supporter 32 can not fixed by chuck axis 39.In this case, development sleeve 132 can (or sense of rotation) rotate around its center on its circumferencial direction under the electromotive force effect, and electromotive force is produced by solenoid 8 electromagnetic induction, and this will be described herein-after.

Chuck cylinder 34 and chuck jaw 40 are used to keep medium altitude target supporter 32, and container unit 9 and development sleeve 132 are coaxial.Therefore, chuck cylinder 34 and chuck jaw 40 are with the center that axially remain on container unit 9 of development sleeve 132 along container unit 9.

Keep chuck 28 to be installed on the mobile foundation 26.Keep chuck 28 to block the flange 51a (will be described herein-after) of the second end 9b that is attached to container unit 9 to support the second end 9b of container unit 9.Keep chuck 28 to adjust or limit the rotation of container unit 9 around its center.

Removable holding unit 6 uses above-mentioned actuator 24 and 25 to go up in vertical direction (direction shown in arrow X and Y) and moves maintenance chuck 28, medium altitude target supporter 32.Therefore, removable holding unit 6 moves and is held chuck 28 is gone up maintenance in vertical direction (direction shown in arrow X and Y) container unit 9.

Mobile cartridge unit 7 comprises supports pedestal 41, and linear steering device 42 keeps chuck 43.Support pedestal 41 to be fixed to an end of the track 29 of linear steering device 22, the wherein more close fixedly holding unit 4 in this end.The support pedestal 41 that forms plate shape has the upper surface that is parallel to horizontal direction.

Linear steering device 42 comprises track 44 and slide block 45.Track 44 is installed in to be supported on the pedestal 41.Form the parallel placement of Width (or direction of arrow Y) of rectilinear track 44 and pedestal 3.Slide block 45 is supported on the track 44 on vertical (or direction of arrow Y) of track 44 slidably.

Keep chuck 43 to be installed on the slide block 45.Keeping chuck 43 to place keeps between the chuck 16 and 28.Keep chuck 43 to block container unit 9 in the position of more close the second end 9b to support container unit 9.Mobile cartridge unit 7 is used for will supporting container unit 9 to be positioned at the given position when keeping chuck 43 to support container unit 9.In addition, when keeping chuck 43 to hold on container unit 9, mobile cartridge unit 7 with keep chuck 28 to be engaged in container unit 9 holding on container unit 9 so that container unit 9 can not come off from bearing rotary unit 27 and surface treatment machine 1 when mobile vertically.

As shown in figure 13, solenoid 8 comprises enclosing cover 46, and coil unit 47.Form columniform enclosing cover 46 and cover coil unit 47.Solenoid 8 has the internal diameter greater than the external diameter of container unit 9.Therefore, form the space between the periphery of the inside surface of solenoid 8 and container unit 9.And the length overall of solenoid 8 is less than the length overall of container unit 9.Preferably, the length overall of solenoid 8 be set to container unit 9 length overall 2/3rds (2/3) or still less.For example, the internal diameter of solenoid 8 is 90mm, and length overall is 85mm.

Enclosing cover 46 is attached to solenoid support pedestal 18 in the axle centrally aligned of axle center and the solenoid 8 of enclosing cover 46.Solenoid 8 and medium altitude target supporter 32, chuck axis 39, and container unit 9 coaxial arrangement.

Coil unit 47 comprises along the coil of the circumferential directions of enclosing cover 46 (or solenoid 8).As shown in figure 13, coil unit 47 is switched on by three-phase alternating-current supply 48.The coil that is passed to the coil unit 47 with out of phase electric current produces has out of phase magnetic field.Solenoid 8 has the magnetic field (hereinafter be called " magnetic field of rotation ") of solenoid 8 around the sense of rotation at its center with these magnetic field combinations with formation.

Moved by axially (or container unit 9 vertically) of solenoid mobile unit 5 with the solenoid 8 in the magnetic field that produces this rotation by three-phase alternating-current supply 48 energising along solenoid 8.The magnetic abrasive grain 65 that solenoid 8 uses the magnetic field of this rotation will be contained in the container unit 9 is positioned on the periphery of development sleeve 132, and makes magnetic abrasive grain 65 rotate (or moving) around development sleeve 132 in container unit 9.Magnetic abrasive grain 65 can be the colony of the magnetic abrasive grain of big figure more.Yet easy in order to describe, the term " magnetic abrasive grain 65 " that uses during this is open has the implication of single or multiple abrasive particles simultaneously.Use this structure, solenoid 8 is pressed on the outside surface of development sleeve 132 magnetic abrasive grain 65 by the magnetic field of using rotation.

And transducer 49 is located between three-phase alternating-current supply 48 and the solenoid 8 to change magnetic field intensity.Transducer 49 can change frequency, current value and the magnitude of voltage that three-phase alternating-current supply 48 is applied to the electric power on the solenoid 8.By change frequency, current value and the magnitude of voltage of the electric power that is applied to solenoid 8 by transducer 49, can improve or reduce from three-phase alternating-current supply 48 being applied to electric power on the solenoid 8, thereby change the intensity of the rotating magnetic field of solenoid 8 generations.

As shown in figure 13, for example, container unit 9 comprises column 50, a plurality of flanges 51, a pair of wood shavings sealing supporter 52, a pair of wood shavings seal pad 53, a pair of keeper 54, a plurality of separators 55, and a pair of seal pad 56.

Forming columniform column 50 is used as the outside envelope of container unit 9 and has single-wall structure.Therefore, container unit 9 is provided with the columniform shell with single-wall structure.For example, the column 50 of container unit 9 preferably has the external diameter of 40mm to 80mm and the thickness of 0.5mm to 2.0mm.And for example, column 50 preferably has the axial length of 600mm to 800mm.For example, column 50 can be made by nonmagnetic substance.

Column 50 is provided with a plurality of abrasive particle supply orifices 57.Each abrasive particle supply orifice 57 passes column 50 so that the interior outside of column 50 interconnects.Each abrasive particle supply orifice 57 all is attached with a sealing cap 58.Abrasive particle supply orifice 57 be used for magnetic abrasive grain 65 absorb the inboard of column 50 or just magnetic abrasive grain 65 be discharged to the outside of column 50.Sealing cap 58 covers on each abrasive particle supply orifice 57 so that magnetic abrasive grain 65 can not spill from the column 50 of container unit 9.

For example, a plurality of flanges 51 form circular or cylindrical.In illustrative examples, a plurality of flanges 51 comprise four flanges, for example, wherein three (hereinafter, flange 51b, 51c 51d) is attached to the first end 9a of column 50, and another (hereinafter, flange 51a) is attached to the second end 9b of column 50.

Forming circular flange 51b engages with the periphery of column 50.Forming circular flange 51c engages with the periphery of flange 51b.Flange 51d integrally comprises having circular ring portion 59 and have columniform post portion 60, and wherein ring portion 59 is outstanding from the outward flange of post portion 60.The ring portion 59 of flange 51d engages with the periphery of flange 51c.

As shown in figure 13, flange 51d is rotatably supporting driven shaft 73 with bearing 74.Form the column 50 coaxial settings of driven shaft 73 with the container unit 9 on cylindrical ground.Driven shaft 73 has an end face that is extruded on the medium altitude target supporter 32.Supporting the first end 32a (or free end side) of medium altitude target supporter 32 with the driven shaft 73 of medium altitude target supporter 32 rotations.

As shown in figure 13, form circular flange 51a and engage with the periphery of the second end 9b of column 50, wherein medium altitude target supporter 32 passes flange 51a.The first end 9a of column 50 is as an end of container unit 9, and the second end 9b of column 50 is as another end of container unit 9.

Each wood shavings sealing supporter 52 forms circle.A wood shavings sealing supporter 52 engages with the inner headed face of the first end 9a of column 50, another wood shavings sealing supporter 52 engages with the inner headed face of the second end 9b of column 50, and wherein medium altitude target supporter 32 passes another wood shavings sealing supporter 52.

Each wood shavings seal pad 53 forms latticed.Forming one of them circular wood shavings seal pad 53 is arranged in the inner headed face of first end 9a of column 50 and is attached to one of them wood shavings sealing supporter 52.And driven shaft 73 passes one of them wood shavings seal pad 53.

Forming another circular wood shavings seal pad 53 is arranged in the inner headed face of the second end 9b of column 50 and is attached to another wood shavings sealing supporter 52.Medium altitude target supporter 32 passes another wood shavings seal pad 53.

When the outside surface that digs development sleeve 132 with the magnetic abrasive grain 65 that compresses produced wood shavings, wood shavings seal pad 53 prevented that wood shavings (as the fragment of planing) from spilling from the column 50 of container unit 9.

Each keeper 54 forms cylindrical.A keeper 54 engages with the periphery of the first end 32a of medium altitude target supporter 32.Another keeper 54 engages with the periphery of the central part 32b of the medium altitude target supporter 32 of the more close the second end 9b that makes container unit 9.

A pair of keeper 54 is clipped in development sleeve 132 therebetween development sleeve 132 is positioned at the given position in the medium altitude target supporter 32.The first end 32a of the medium altitude target supporter 32 more close fixedly holding unit 4 in location and away from removable holding unit 6.The central part 32b that is positioned at the medium altitude target supporter 32 in the container unit 9 is away from fixedly holding unit 4 and more close removable holding unit 6.

Separator 55 comprises the framework 61 that forms circle, and lattice portion 62.Framework 61 engages with the inner headed face of column 50 and is attached, and wherein medium altitude target supporter 32 passes framework 61.As shown in figure 13, a plurality of separators 55 column 50 vertically on be arranged between a pair of wood shavings seal pad 53 with given spacing.For example, in Figure 13, be provided with seven separators 55.

Framework 61 comprises that lattice portion 62 is attached to the through hole 63 on it.Form latticed lattice portion 62 can make gas and wood shavings (as the fragment of planing) by but make the magnetic abrasive grain 65 can't be from wherein passing through.

Separator 55 development sleeve 132 axially on the space in the column 50 of container unit 9 is separated or segmentation.The framework 61 of separator 55 and lattice portion 62 are made by nonmagnetic substance.

And, development sleeve 132 have with container unit 9 and medium altitude target supporter 32 the axle centrally aligned rotation center P.Therefore, the rotation center P of development sleeve 132 and container unit 9 vertically be set at parallel to each other.

Form circular seal pad 56 further form latticed so that gas (as air) and above-mentioned wood shavings (as the fragment of planing) can by but magnetic abrasive grain 65 can't be passed through.Plate 56 wherein sealing together is attached to the nearest separator 55 apart from first end 9a, and another piece seal pad 56 is attached to the nearest separator 55 apart from the second end 9b.The cap tube 64 (introducing after a while) that is attached to the two ends of development sleeve 132 passes every seal pad 56.Seal pad 56 is used for preventing that magnetic abrasive grain 65 from spilling from the column 50 of container unit 9, and wherein magnetic abrasive grain 65 is contained in the space that is separated part 55 separations or segmentation.

Container unit 9 fills the magnetic abrasive grain of being made by magnetic material 65 in by the space of a plurality of separators 55 separations or segmentation, and fills the development sleeve 132 that is attached to medium altitude target supporter 32 in column 50.Therefore, container unit 9 is contained in development sleeve 132 and magnetic abrasive grain 65 wherein.

And, be pressed on the outside surface of development sleeve 132 by the magnetic abrasive grain 65 of the magnetic field of above-mentioned rotation rotation (or moving).When magnetic abrasive grain 65 was pressed on the outside surface of development sleeve 132, the part of the outside surface of development sleeve 132 was by this snap-in force planing, and the outside surface of development sleeve 132 is by roughening thus.

As shown in figure 13, collector unit 10 comprises gas inflow pipe 66, gas discharge hole 67, grid member 68, gas outlet pipe 69, and dust-collector 70 (seeing Figure 12).As shown in figure 13, gas inflow pipe 66 is located at more close above-mentioned another wood shavings sealing supporter 52 and an end of container unit 9 in the column 50, the given position of more close removable holding unit 6.Gas inflow pipe 66 has the mouth in the column 50 that is inserted into container unit 9.Gas inflow pipe 66 is used for from the compressed air supplies (not shown) to column 50 compressed gas supplying (as air).

Gas discharge hole 67 passes column 50 so that the interior outside of container unit 9 interconnects, and is set to the given position away from removable holding unit 6 between an end of the column 50 of above-mentioned wood shavings sealing supporter 52 and container unit 9.Grid member 68 is located at gas discharge hole 67 places that offer column 50.Grid member 68 can be passed through wood shavings (as the fragment of planing) and gas, but magnetic abrasive grain 65 can't pass through.Therefore, grid member 68 can prevent that magnetic abrasive grain 65 from spilling from the column 50 of container unit 9.

The gas outlet pipe 69 that forms tubulose is attached near the gas discharge hole 67.Gas outlet pipe 69 is around the outward flange of gas discharge hole 67.The gas that gas discharge hole 67 and gas outlet pipe 69 are used for being supplied to column 50 by gas inflow pipe 66 guides to the outside of the column 50 of container unit 9.

The dust-collector 70 that is attached to gas outlet pipe 69 is from gas outlet pipe 69 draw gas.By draw gas from gas outlet pipe 69, dust-collector 70 sucks above-mentioned wood shavings (as the fragment of planing) to collect wood shavings (as the fragment of planing) from the column 50 of container unit 9.So, collector unit 10 is collected wood shavings (as the fragment of planing) from the column 50 of container unit 9.

As shown in figure 12, cooling unit 11 comprises cooling fan 71, and cooling tube 72.Cooling fan 71 is to cooling tube 72 compressed gas supplying (as air) that are tubulose.Cooling tube 72 will guide to solenoid 8 by the pressure gas (as air) that cooling fan 71 supplies come, and pressure gas (as air) is blowed to solenoid 8.By the gas (as air) that contracts to solenoid 8 blow pressures, cooling unit 11 cooling solenoids 8.

As shown in figure 13, linear encoder 75 comprises main body 77, and is located at the detection part 78 on the main body 77 slidably.Main body 77 has linear and is attached to pedestal 3.Main body 77 is arranged between the pair of tracks 20, and wherein main body 77 is parallel to track 20.The length overall of main body 77 is greater than container unit 9.The two ends of main body 77 container unit 9 vertically on outstanding from the two ends of container unit 9.

Detection part 78 container unit 9 vertically on be located at slidably on the main body 77.Detection part 78 is attached to solenoid and supports pedestal 18.Therefore, detection part 78 supports that by solenoid pedestal 18 is attached to solenoid 8.

Linear encoder 75 is surveyed the position of detection part 78 with respect to main body 77 (or container unit 9), and to result of detection signal of control module 76 outputs.So, linear encoder 75 detect solenoid 8 with respect to or the relative position of container unit 9 (or development sleeve 132), and to result of detection signal of control module 76 outputs.

Control module 76 comprises CPU (CPU (central processing unit)), RAM (random access memory) and ROM (ROM (read-only memory)) etc.Control module 76 is connected to circle mobile unit 5, removable holding unit 6, removable chuck unit 7, solenoid 8, transducer 49, collector unit 10, cooling unit 11 and linear encoder 75 etc. with control surface handling machine 1 integrally.

Control module 76 stores the rotating magnetic field intensity of the solenoid of judging with respect to the relative position of development sleeve 132 according to solenoid 88, and for example, wherein this relative position of solenoid 8 is surveyed by linear encoder 75.

Therefore, control module 76 stores by transducer 49 and is applied to power value on the solenoid 8, and wherein power value determines according to the relative position of solenoid 8 with respect to development sleeve 132.And for example, control module 76 can be stored the power value at the development sleeve 132 of every type (as production number).

In illustrative examples, a given electric power mode or profile of control module 76 storages, wherein move and during through development sleeve 132 to both ends from the central part of development sleeve 132 at solenoid 8, the power value that is applied on the solenoid 8 by transducer 49 increased gradually along vertically (or axially) of development sleeve 132.Control module 76 with this given mode or profile control change device 49 to change the intensity of the rotating magnetic field that produces by solenoid 8.

So, in illustrative examples, for example, control module 76 is control change device 49 and solenoid 8 as mentioned above, thereby with when handling the central part of development sleeve 132, compare, the intensity of the rotating magnetic field that solenoid 8 produces when handling the both ends of development sleeve 132 is bigger.

As mentioned above, control module 76 stores the rotating magnetic field intensity of the solenoid 8 that determines with respect to the relative position of development sleeve 132 according to solenoid 8, wherein this relative position of solenoid 8 is surveyed by linear encoder 75, and control module 76 stores accordingly by transducer 49 and is applied to power value on the solenoid 8.

And for example, control module 76 is connected to input block such as keyboard and display unit such as LCD (LCD).

Refer now to the magnetic abrasive grain 65 that Figure 14 introduction is used for surface treatment machine 1.As shown in figure 14, magnetic abrasive grain 65 has the cylindrical of relatively short length.Magnetic abrasive grain 65 can be made by magnetic material such as Ovshinsky stainless steel, Ma Shi stainless steel etc.Although the Ovshinsky stainless steel is often used as nonmagnetic substance, can make it have magnetic by the Ovshinsky stainless steel being carried out cold treatment, wherein the Ovshinsky stainless steel can be changed into the Ma Shi stainless steel with magnetic.Because this type of Ovshinsky stainless steel or Ma Shi stainless steel are all available on market, magnetic abrasive grain 65 can be preferably made with the Ovshinsky stainless steel or the Ma Shi stainless steel that have than reasonable price or the cost that reduces.

Magnetic abrasive grain 65 can have given size.For example, magnetic abrasive grain 65 can have the external diameter of 0.1mm to 2.0mm.When the length overall of magnetic abrasive grain 65 is TL and external diameter when being D, magnetic abrasive grain 65 can form the shape with TL/D value of 2 to 20.

Use the magnetic abrasive grain 65 of structure like this, the outward flange 65a of magnetic abrasive grain 65 can compress development sleeve 132 reliably, and the length overall that has of magnetic abrasive grain 65 can compress when magnetic abrasive grain 65 compresses development sleeve 132 on the outside surface of development sleeve 132 and preferentially forms enough dark recess or protuberance.

And shown in Figure 14 and 15, the outward flange 65a of magnetic abrasive grain 65 places chamfering and have circular arc on cut-open view outside it.For example, outward flange 65a forms the given arc radius with 0.03mm to 0.5mm.This magnetic abrasive grain 65 has the optimum shape that forms recess and protuberance in the mode of appropriateness on the outside surface of the processed object of desire.

As shown in figure 16, under the effect of the rotating magnetic field that produces in surface treatment machine 1, when the circumferencial direction of development sleeve 132 and container unit 9 was mobile rotatably, the center on it is vertical rotated at magnetic abrasive grain 65.

Introduce the surperficial roughening of the development sleeve 132 that uses surface treatment machine 1 below and handle, wherein the outside surface of development sleeve 132 is by magnetic abrasive grain 65 roughening.

At first, use input block such as touch pad that the information such as production number of development sleeve 132 are inputed to control module 76.Then, the cap tube 64 with cylindrical shape engages with the periphery of development sleeve 132 at the two ends of development sleeve 132.

Other above-mentioned then keeper 54 engages the periphery of medium altitude target supporter 32, and medium altitude target supporter 32 is inserted in the development sleeve 132 then, and cap tube 64 is attached to its both ends.Then, one of above-mentioned keeper 54 also engages the periphery of medium altitude target supporter 32.

In illustrative examples, when development sleeve 132 was not fixed to medium altitude target supporter 32 by chuck jaw 40, development sleeve 132 can be along its circumferencial direction around its center rotation.If chuck jaw 40 is set to outstanding state by the periphery with respect to medium altitude target supporter 32, then development sleeve 132 and medium altitude target supporter 32 are fixed by chuck axis 39.

At this moment, development sleeve 132 coaxially is arranged in the medium altitude target supporter 32 gap (as less than 1mm) of maintenance given level between the development sleeve 132 and medium altitude target supporter 32 simultaneously.

Then, in development sleeve 132 and the medium altitude target supporter 32 storage container unit 9, and magnetic abrasive grain 65 is supplied in the column 50 of container unit 9 into.Handle thus, in magnetic abrasive grain 65 and the development sleeve 132 storage container unit 9.

And container unit 9 is held chuck 28 and 43 and blocks.Handle thus, development sleeve 132 and container unit 9 are attached to removable holding unit 6, wherein column 50, medium altitude target supporter 32 and development sleeve 132 coaxial settings.

By adjusting the position of mobile foundation 26 and adjust the position of supporting pedestal 41, removable holding unit 6 can be attached to development sleeve 132 and container unit 9 with above-mentioned actuator 24 and 25.Then, by with keeping chuck 16 to block the first end 9a of container unit 9, the first end 9a of container unit 9 holding unit 4 that is fixed keeps.

Then, gas is supplied into container unit 9 by the gas inflow pipe 66 of collector unit 10, and dust-collector 70 draw gas from container unit 9.And cooling unit 11 is to the solenoid 8 blow pressures gas (as air) that contracts.

Then, for example, solenoid 8 applies electric power has 200Hz or bigger frequency with generation rotating magnetic field by three-phase alternating-current supply 48.Because the rotating magnetic field of this generation produces vortex flow in the development sleeve 132.This rotating magnetic field and vortex flow produce electromagnetic induction electromotive force, and development sleeve 132 is to be similar to the revolution rotation corresponding to the frequency of rotating magnetic field thus.

And, be placed in the interior magnetic abrasive grain 65 in zone of the action of a magnetic field that can accept solenoid 8, in magnetic abrasive grain 65 centers rotations also the periphery along development sleeve 132 move rotatably, magnetic abrasive grain 65 compresses the outside surface of the outside surface of development sleeve 132 with roughening development sleeve 132 thus.

In this roughening processing procedure, solenoid mobile unit 5 is with mode regularly vertically shifting continuously or mobile solenoid 8 along solenoid 8.This transfer by solenoid 8 or move, the magnetic abrasive grain 65 that newly enters the magnetic field space of solenoid 8 under the effect of above-mentioned rotating magnetic field, begin to move (as, around its center rotation with around development sleeve 132 rotations), and the magnetic abrasive grain 65 of the magnetic field space of disengaging solenoid 8 stops its motion.

When magnetic abrasive grain 65 enters into the magnetic field space of solenoid 8, magnetic abrasive grain 65 randomly and omnirange ground be pressed on the surface of development sleeve 132, this represents that magnetic abrasive grain is pressed onto on the development sleeve 132 simultaneously from the almost any direction with respect to the surface of development sleeve 132.Therefore, with traditional carving at a time magnetic abrasive grain is compared from the blasting treatment that a direction is pressed onto on the target object, development sleeve 132 is accepted pressure in its surface equably when forming depression 139 by the surface treatment machine 1 according to illustrative examples, this distortion that can preferentially suppress development sleeve 132 (is shifted as axle, inside/outside directly changes, and sleeve-shaped is crushed).

And, because separator 55 is separated or segmented container unit 9 in the space, magnetic abrasive grain 65 is prevented from shifting out from each separator 55, the magnetic abrasive grain 65 that shifts out from the magnetic field space of solenoid 8 also shifts out from the above-mentioned rotating magnetic field of solenoid 8 thus.When solenoid mobile unit 5 along the direction shown in the arrow X during with the reciprocally mobile solenoid 8 of given number of times, the surperficial roughening of development sleeve 132 outside surfaces is finished dealing with.

In illustrative examples, for example, compare during with the central part of handling development sleeve 132, when handling the both ends of development sleeve 132, the rotating magnetic field intensity that is produced by solenoid 8 is set to bigger value.In other words, for example, the rotating magnetic field intensity that is produced by solenoid 8 becomes big gradually from the central part of development sleeve 132 on the direction of both ends.

Rotating magnetic field intensity is big more, and the motion of magnetic abrasive grain 65 is vibration more.Therefore, when rotating magnetic field intensity increases, magnetic abrasive grain 65 is tight with processed target object (as development sleeve 132) with bigger defeating, and the degree of depth that is formed on the lip-deep depression of development sleeve 132 thus becomes big gradually or deepens in vertically (or axially) along development sleeve 132.Therefore, compare with the depression that is formed on development sleeve 132 central parts, the depression that is formed on development sleeve 132 ends has the bigger degree of depth.

After this surperficial roughening of development sleeve 132 outside surfaces was finished dealing with, the electric power effect on the solenoid 8 stopped, and also stopped to the electric power effect of collector unit 10 and cooling unit 11.Then, keep chuck 16 from container unit 9 is supported to fixedly discharging the holding unit 4.After this discharges, when supporting container units 9, use first actuator 24 that mobile foundation 26 is left from fixing holding unit 4 on the direction of arrow X with the maintenance chuck 28 of the maintenance chuck 43 of removable chuck unit 7 and removable chuck unit 6.Process thus, container unit 9 separates from fixing holding unit 4.Then, the development sleeve of being handled by surperficial roughening 132 shifts out from container unit 9.

Handle by above-mentioned surperficial roughening, can produce the development sleeve 132 with rough external surface (see figure 2), wherein the degree of depth of the depression on the development sleeve 132 becomes big gradually or deepens at the central part from development sleeve 132 on the direction at both ends.For example, according to the development sleeve 132 of illustrative examples have be formed on the development sleeve 132 at random and the degree of depth according to the depression that changes as mentioned above.The decline of the end development capability of the development sleeve that is caused by the given factor beyond the development sleeve with control to development sleeve 132 is established in this variation of cup depth.

Then, another new development sleeve is placed in and is contained in the container unit 9 and handles to carry out another surperficial roughening.

In illustrative examples, when the surperficial roughening that is used to carry out development sleeve 132 outside surfaces when surface treatment machine 1 was handled, solenoid 8 was created in the rotating magnetic field that produces vortex flow in the development sleeve 132.This rotating magnetic field and vortex flow produce electromagnetic induction electromotive force, and development sleeve 132 is to be similar to the revolution rotation corresponding to the frequency of rotating magnetic field thus.

And, as shown in figure 16, under the effect of rotating magnetic field, the magnetic abrasive grain 65 that is placed in certain position in the solenoid 8 in the rotation of magnetic abrasive grain 65 centers also the periphery along development sleeve 132 move rotatably, magnetic abrasive grain 65 compresses the outside surface of the outside surface of development sleeve 132 with roughening development sleeve 132 thus.The magnetic abrasive grain 65 that rotates around its center is to be similar to the revolution rotation corresponding to the frequency of rotating magnetic field.

Because the sense of rotation of the magnetic abrasive grain 65 that rotates around its center is identical with the sense of rotation of development sleeve 132, as shown in figure 16, the outward flange 65a of magnetic abrasive grain 65 compresses development sleeve 132 with relative velocity, and this speed is directly proportional with the square value of the frequency of rotating magnetic field.

Therefore, the frequency of rotating magnetic field is big more, the relative velocity of magnetic abrasive grain 65 is just big more, to be formed on the size of lip-deep depression of development sleeve 132 just big more on development sleeve 132 circumferencial directions by push magnetic abrasive grain 65 in the time in every unit thus, and the longitudinal size of the depression on the outside surface of development sleeve 132 is just more likely aimed at the circumferencial direction (or sense of rotation) of development sleeve 132.

And, because the snap-in force of magnetic abrasive grain 65 increases with the increase of relative velocity proportionally, if relative velocity effectively increases, the outside surface that the outward flange 65a of magnetic abrasive grain 65 compresses development sleeve 132 rotatably sweeps or turn up with the outside surface with development sleeve 132.

And, as shown in figure 16 because more magnetic abrasive grain 65 moves, more a plurality of depressions that have elliptical shape and be formed on the outside surface of development sleeve 132 can be formed on the development sleeve 132 by oval-shaped major axis is aimed at the circumferencial direction of development sleeve 132.

And, because when magnetic abrasive grain 65 compress the outside surface of development sleeve 132 and begin to sweep or the outside surface of turn up development sleeve 132 when forming depression 139, the rotation function of magnetic abrasive grain 65 can consume the rotation function of magnetic abrasive grain 65, so can disappear substantially during depression 139 forms.When the rotation function of magnetic abrasive grain 65 disappeared substantially, magnetic abrasive grain 65 can be upspring from development sleeve 132.Because just after magnetic abrasive grain 65 initially compresses when magnetic abrasive grain 65 compress the outside surface of development sleeve 132 and sweep or during some part of turn up development sleeve 132 this rotation function of magnetic abrasive grain 65 disappear substantially, the depression 139 have as shown in figure 17 on fore-and-aft direction the symmetry shape of cross section, the depression 139 that wherein has elliptical shape and be formed on the outside surface of development sleeve 132 has deep 200c at the back location place with respect to the depression 139 of the sense of rotation of development sleeve 132, and wherein this sense of rotation can be the sense of rotation of development sleeve 132 when magnetic-particle attracted on the development sleeve 132.

Therefore, as shown in figure 18, the first imaginary line L1 that extends radially outwardly from the deep 200c of depression 139 along development sleeve 132 is at 45 with interior angle α with the second imaginary line L2 shape that extends out to peripheral end portion 200a from 139 the deep 200c of caving in, wherein peripheral end portion 200a is positioned at the back location with respect to depression 139 on the sense of rotation of development sleeve 132, as shown by arrows.

As shown in figure 17, when magnetic abrasive grain 65 compress and the outside surface of turn up development sleeve 132 when forming depression 139, depression 139 has peripheral end portion 200a with respect to the back location place on development sleeve 132 sense of rotation, and wherein peripheral end portion 200a is outstanding from the outside surface of development sleeve 132.

Therefore, as shown in figure 18, depression 139 has imaginary line section La and radius section Lb.The rotation center P of imaginary line section La autography sleeve 132 extends to the peripheral end portion 200a of depression 139.Radius section Lb is half of development sleeve 132 external diameters.In illustrative examples, imaginary line section La is greater than radius section Lb.

And, because more a plurality of magnetic abrasive grains 65 move rotatably at the circumferencial direction of the effect lower edge development sleeve 132 that is created in the rotating magnetic field on the development sleeve 132, more a plurality of depressions 139 that have elliptical shape and be formed on the outside surface of development sleeve 132 can be formed on the development sleeve 132 by oval-shaped major axis is aimed at the circumferencial direction of development sleeve 132.The deep 200c of this depression 139 is near the position, back, and peripheral end portion 200a is positioned at position, back and outstanding from the outside surface of development sleeve 132.

As described in associative list 1 after a while, when the frequency of rotating magnetic field during approximately greater than 200Hz, the number of the depression of aiming at the circumferencial direction (or sense of rotation) of development sleeve 132 greater than with the number of the axially aligned depression of development sleeve 132.And as described in associative list 1 after a while, when the rotating magnetic field frequency was located between the 200Hz to 400Hz, angle a was less than 45 ° and obtain the relation of " 20 μ m 〉=La-Lb＞5 μ m ".

As mentioned above, in illustrative examples, surface treatment machine 1 and magnetic abrasive grain 65 are used for forming effectively more a plurality of depressions 139 with elliptical shape on the outside surface of development sleeve 132.And, depression 139 comprise have development sleeve 132 axially on extend or the oval-shaped first depression 139a that aims at and have the oval-shaped second depression 139b that on the circumferencial direction of development sleeve 132, extends or aim at, wherein the number of the second depression 139b is greater than the number of the first depression 139a.

Therefore, the magnetic-particle that is included in the developer 126 is attracted on the outside surface equably along the circumferencial direction of development sleeve 132.And this magnetic-particle attracted on the outside surface of development sleeve 132 with the density on the circumferencial direction of bigger as mentioned above development sleeve 132.Therefore, developer roll 115 can be fed to developer 126 on the circumferencial direction of photosensitive drums 108 more equably.In other words, developer 126 can be supplied to the sense of rotation of photosensitive drums 108 more equably, and wherein the sense of rotation of photosensitive drums 108 is aimed at the direction of transfer of transfer such as paper, intermediate transfer belt etc.Therefore, toner image can be developed on the photosensitive drums 108 by the unevenness that reduces image color, and thus, having high-quality image can be created on the transfer.

Although the development sleeve 132 according to illustrative examples is built into transmission direction (as the paper transmission direction) the epigraph density unevenness of controlling transfer such as paper as mentioned above, this development sleeve 132 also can preferentially be controlled Width (as paper width direction) the epigraph density unevenness perpendicular to the transfer of the transmission direction of transfer.Therefore, use has best general image concentration level according to the image of development sleeve 132 generations of illustrative examples.

And, as mentioned above, when making by the outside surface that magnetic abrasive grain 65 is pressed to development sleeve 132 when having oval-shaped depression 139 and being formed on the outside surface of development sleeve 132, be pressed on the outside surface of development sleeve 132 to magnetic abrasive grain 65 omniranges, this expression magnetic abrasive grain is pressed onto on the development sleeve 132 simultaneously from the almost any direction with respect to the surface of development sleeve 132.Therefore, with traditional carving at a time magnetic abrasive grain is compared from the blasting treatment that a direction is pressed onto on the target object, development sleeve 132 is accepted pressure in its surface equably when using surface treatment machine 1 according to illustrative examples to form depression 139, this distortion that can preferentially control development sleeve 132 (is shifted as axle, inside/outside directly changes, and sleeve-shaped is crushed).

Therefore, the precision that development sleeve 132 can be higher is manufactured, and more high precision rotation, and thus, having higher-quality image can produce with higher toner density level.

And, when surface treatment machine 1 and magnetic abrasive grain 65 are used for forming on the outside surface of development sleeve 132 when having the depression 139 of elliptical shape, the first imaginary line L1 that extends radially outwardly from deep 200c along development sleeve 132 is at 45 with interior angle α with the second imaginary line L2 shape that extends to peripheral end portion 200a from 139 the deep 200c of caving in.This depression 139 has peripheral end portion 200a with respect to development sleeve 132 sense of rotation in its position, back, and wherein peripheral end portion 200a is outstanding from the outside surface of development sleeve 132.Therefore, when developer 126 was carried on the development sleeve 132, depression 139 is turn up magnetic-particle and remaining on wherein effectively.Therefore, magnetic-particle can remain on the outside surface of development sleeve 132 more reliably, and developer 126 can remain on the outside surface of development sleeve 132 more reliably thus.Therefore, the amount of development sleeve 132 portable developers 126 can not reduce and image with suitable toner density produces sustainably because of the time.

And, the degree of depth of the depression 139 in the illustrative examples can be made as less relatively value and can keep the better level of hold facility of developer, thus, being applied in processing energy (as mechanical force) on the outside surface of development sleeve 132, can be set up ground less, the distortion that can preferentially control development sleeve 132 like this (is shifted as axle, inside/outside directly changes, and sleeve-shaped is crushed).Therefore, the precision that development sleeve 132 can be higher is manufactured, and more high precision rotation, and thus, having higher-quality image can produce with higher toner density level.

The experiment of the surperficial roughening processing that is used for hollow structure that introduction use surface treatment machine 1 carries out below.In experiment, the electric current and the frequency values that affact solenoid 8 change the surperficial roughening processing of carrying out hollow structure (for for simplicity, being called development sleeve 132 or development sleeve hereinafter) with the method for handling according to illustrative examples and conventional surface roughening.Experimental result is used in sensory evaluation's method of the unevenness of evaluate image concentration in the paper transmission direction and assesses.

Experimental example 1:

By using surface treatment machine 1, by magnetic abrasive grain 65 (external diameter: 0.8mm, length: 5mm, material: SUS 304) is pressed to development sleeve 132 (external diameter: 18mm randomly, length: 240mm, material: aluminium alloy A6063) upward carry out surperficial roughening and handle.Handle when carrying out when this surperficial roughening, it is that 10A and frequency are the electric power of 200Hz that solenoid 8 is applied current value, and the processing time that this surperficial roughening is handled be 30 seconds, the amount of magnetic abrasive grain 65 is 50g.

Experimental example 2:

The preparation of development sleeve 132 is similar to experimental example 1.Handle when carrying out when this surperficial roughening, it is that 20A and frequency are the electric power of 200Hz that solenoid 8 is applied current value, and the processing time that this surperficial roughening is handled be 30 seconds, the amount of magnetic abrasive grain 65 is 50g.

Experimental example 3:

The preparation of development sleeve 132 is similar to experimental example 1.Handle when carrying out when this surperficial roughening, it is that 20A and frequency are the electric power of 300Hz that solenoid 8 is applied current value, and the processing time that this surperficial roughening is handled be 30 seconds, the amount of magnetic abrasive grain 65 is 50g.

Experimental example 4:

The preparation of development sleeve 132 is similar to experimental example 1.Handle when carrying out when this surperficial roughening, it is that 20A and frequency are the electric power of 400Hz that solenoid 8 is applied current value, and the processing time that this surperficial roughening is handled be 30 seconds, the amount of magnetic abrasive grain 65 is 50g.

Experimental example 5:

The preparation of development sleeve 132 is similar to experimental example 1.Handle when carrying out when this surperficial roughening, it is that 30A and frequency are the electric power of 200Hz that solenoid 8 is applied current value, and the processing time that this surperficial roughening is handled be 30 seconds, the amount of magnetic abrasive grain 65 is 50g.

The contrast experiment 1:

Development sleeve is prepared by forming groove on its outer surface, and wherein the length of groove is 220mm, width 0.1mm, and degree of depth 0.2mm, and spacing is 0.18mm between groove and the groove.

The contrast experiment 2:

To have average particulate diameter be that to carry out the processing time be that 30 seconds and expulsion pressure are 4kgf/cm for the alumina abrasive grain outer surface of 500 μ m by using ²Blasting treatment, development sleeve is prepared.

The contrast experiment 3:

To have average particulate diameter be that to carry out the processing time be that 30 seconds and expulsion pressure are 4kgf/cm for the alumina abrasive grain outer surface of 50 μ m by using ²Blasting treatment, development sleeve is prepared.

The contrast experiment 4:

The preparation of development sleeve 132 is similar to experimental example 1.Handle when carrying out when this surperficial roughening, it is that 10A and frequency are the electric power of 150Hz that solenoid 8 is applied current value, and the processing time that this surperficial roughening is handled be 30 seconds, the amount of magnetic abrasive grain 65 is 50g.

The contrast experiment 5:

The preparation of development sleeve 132 is similar to experimental example 1.Handle when carrying out when this surperficial roughening, it is that 20A and frequency are the electric power of 150Hz that solenoid 8 is applied current value, and the processing time that this surperficial roughening is handled be 30 seconds, the amount of magnetic abrasive grain 65 is 50g.

The contrast experiment 6:

The preparation of development sleeve 132 is similar to experimental example 1.Handle when carrying out when this surperficial roughening, it is that 30A and frequency are the electric power of 150Hz that solenoid 8 is applied current value, and the processing time that this surperficial roughening is handled be 30 seconds, the amount of magnetic abrasive grain 65 is 50g.

The contrast experiment 7:

The preparation of development sleeve 132 is similar to experimental example 1.Handle when carrying out when this surperficial roughening, it is that 20A and frequency are the electric power of 100Hz that solenoid 8 is applied current value, and the processing time that this surperficial roughening is handled be 30 seconds, the amount of magnetic abrasive grain 65 is 50g.

The contrast experiment 8:

The preparation of development sleeve 132 is similar to experimental example 1.Handle when carrying out when this surperficial roughening, it is that 30A and frequency are the electric power of 100Hz that solenoid 8 is applied current value, and the processing time that this surperficial roughening is handled be 30 seconds, the amount of magnetic abrasive grain 65 is 50g.

The development sleeve of preparing according to above-mentioned experimental example and contrast experiment is used for following test.

The development sleeve of preparing according to above-mentioned experimental example and contrast experiment is installed in the imaging device (the product I PSIO CX400 of Ricoh company).Photosensitive drums 8 is recharged 620V, and uses the development bias voltage of 385V.The bi-component blue developer that comprises the carrier with average particulate diameter 35 μ m is as developer 126, and the extracted amount of developer 126 is set at 50mg/cm ²Be provided with down at this, imaging device is exported the solid-state image of 10000 width of cloth 195mm * 285mm, and the unevenness of the image color on paper conveyance direction is assessed with sensory evaluation's method.Particularly, the unevenness of image color is in order to following criterion evaluation behind the unevenness of the image color under the development sleeve initial conditions and 10,000 images of output, and the result is as shown in table 1.

Standard A: the image color on the paper conveyance direction is uniformly, and does not observe the inequality of image color.

Standard B: the image color of observing on the paper conveyance direction is inhomogeneous, but actual use is out of question.

Standard C: the image color of observing on the paper conveyance direction is inhomogeneous, and actual use problem occurs.

And, because in experimental example 1 to 5 and contrast experiment 4 to 8, carry out handling according to the surperficial roughening of illustrative examples with surface treatment machine 1, have being recessed to form on development sleeve of elliptical shape.The same ratio that shows the second depression 139b (see figure 6) in the concave 139 that the circumferencial direction along development sleeve in each cellar area extends on the development sleeve of table 1.

Table 1

	Density unevenness evenness		The ratio n (%) of second depression	Angle [alpha] (degree)	La-Lb (μm)	Frequency y (Hz)
							Initially	After 10000
	Ex.1	A							A		60	22	7.3	200
Ex.2			A	A		60	21	7.9							200
	Ex.3	A							A	85	33	11.3	300
Ex.4			A	A	95	41	19.7	400
	Ex.5	A							A		60	19	7.2	200
Ex.6			A	A	95	44	18.5	450
	Ex.7	A							A	95	43	11.9	450
Ex.8			A	A	95	43	6.1	450
	CEx.1	C							C	-	-	-	-
CEx.2			C	C	-	-	-	-
	CEx.3	C							C	-	-	-	-
CEx.4			B	B		40	17	6.1						150
	CEx.5	B							B		40	17	5.3		150
CEx.6			B	B		40	16	5.8						150
	CEx.7	B							B		20	13	4.2		100
CEx.8			B	B		20	13	3.9						100
	CEx.9	A							B	95	44	20.8	450
CEx.10			B	B	95	44	4.5	450
	CEx.11	B							B	95	48	11.5	500

In table 1, " Ex. " represents experimental example, and " CEx. " represents contrast experiment's example.

As shown in table 1, has the result that image color unevenness on the paper conveyance direction is less or almost do not have by the development sleeve of handling the experimental example 1 to 5 prepared and contrast experiment 4 to 8 according to the surperficial roughening of illustrative examples, compare with the development sleeve that uses the conventional surface roughening to handle the contrast experiment 1 to 3 who prepares, this is a good relatively result, wherein experimental example 1 to 5 has standard A, and contrast experiment 4 to 8 has standard B.

And in experimental example 1 to 5, solenoid is applied with 200Hz or bigger frequency.In this experimental example 1 to 5, with development sleeve 132 axially on extend or the first depression 139a (seeing Table " ratio of second depression " in 1) that aims at compares, have the depression 139 on the outside surface that is formed on development sleeve 132 of elliptical shape has extending of greater number or aims on the circumferencial direction of development sleeve 132 the second depression 139b.As shown in table 1, this experimental example 1 to 5 shows good result.

According to this experimental example 1 to 5, can confirm, on the outside surface of development sleeve 132, the number of the second depression 139b that extends on the circumferencial direction of development sleeve 132 or aim at set more than development sleeve 132 axially on extend or during the number of the first depression 139a that aims at, can control or prevent the unevenness of the image color on paper conveyance direction.

And the other experiment of carrying out is used to assess the influence of a shape factor of the depression 139 on the outside surface that is formed on development sleeve 132 to paper conveyance direction epigraph density unevenness evenness.

Particularly, act on current value and frequency on the solenoid 8 by change, at experimental example 1,2,3,5,7 and contrast experiment 11 in carry out handling according to the surperficial roughening of illustrative examples.

As shown in figure 18, the depression 139 that is formed on the outside surface of development sleeve 132 has deep 200c, and the first imaginary line L1 is from caving in 139 deep 200c extending radially outwardly along development sleeve 132, the second imaginary line L2 extends to peripheral end portion 200a from 139 the deep 200c of caving in, wherein peripheral end portion 200a is positioned at the back location with respect to the depression 139 of development sleeve 132 sense of rotation, as shown by arrows.The angle [alpha] that the first and second imaginary line L1 and L2 form.

Act on current value and frequency on the solenoid 8 by change, the development sleeve with different angles α is prepared so that with the image color unevenness on above-mentioned sensory evaluation's method assessment paper conveyance direction.Table 1 has provided these result of experiment equally.

Experimental example 7:

The preparation of development sleeve 132 is similar to experimental example 1.Handle when carrying out when this surperficial roughening, it is that 20A and frequency are the electric power of 450Hz that solenoid 8 is applied current value, and the processing time that this surperficial roughening is handled be 30 seconds, the amount of magnetic abrasive grain 65 is 50g.After this, using the rotating speed rotation development sleeve 132 of rotary machine with 1480rpm (revolution of per minute), is that the belt of #400 was expressed on the surface of development sleeve 132 for 10 seconds with the surface of polishing development sleeve 132 with the power of 10kgf with surfaceness.This band polishing is carried out outward flange 200a with scraping depression 139 to reduce imaginary line section La.

The contrast experiment 11:

The preparation of development sleeve is similar to experimental example 1.Handle when carrying out when this surperficial roughening, it is that 20A and frequency are the electric power of 500Hz that solenoid 8 is applied current value, and the processing time that this surperficial roughening is handled be 30 seconds, the amount of magnetic abrasive grain 65 is 50g.After this, using the rotating speed rotation development sleeve 132 of rotary machine with 1480rpm (revolution of per minute), is that the belt of #400 was expressed on the surface of development sleeve 132 for 15 seconds with the surface of polishing development sleeve 132 with the power of 10kgf with surfaceness.This band polishing is carried out outward flange 200a with scraping depression 139 to reduce imaginary line section La.

Use the development sleeve of so preparing, the image color unevenness on the paper conveyance direction is assessed with above-mentioned sensory evaluation's method.Table 1 has shown this result of experiment, and 139 the angle [alpha] of wherein caving in also is shown.By extracting a plurality of depressions 139 as the angle of sample and mean sample depression 139 α that can take measurement of an angle.

And, in order to confirm the relation between angle [alpha] and the image color unevenness, by development sleeve is carefully carried out surface treatment, parameter outside the set angle α is (as oval-shaped long axis length, oval-shaped minor axis length, the degree of depth of depression, length L a and Lb) approximate with value in the development sleeve of preparing, these parameters can not impact the result thus.

As shown in table 1, to compare with the development sleeve of preparing among the contrast experiment 11 with standard B, the development sleeve of preparing in the experimental example 1,2,3,5 and 7 132 does not almost have image color unevenness (as standard A) on paper conveyance direction, and this is good result.

Therefore,, can confirm when the frequency of rotating magnetic field is 200Hz to 400Hz that the depression 139 on the development sleeve 132 has angle [alpha] less than 45 ° (α＜45 °) according to experimental example 1 to 5.And, angle [alpha] factor experimental example 1,2,3,5 and 7 shows good result's (as standard A) on image color although the length in experimental example 1,2,3,5 and 7 " La-Lb (μ m) " less than the length among the contrast experiment 11 " La-Lb (μ m) ", can be confirmed.According to this result, can confirm when depression 139 has angle [alpha] less than 45 ° (α＜45 °), can control or prevent paper conveyance direction epigraph density unevenness evenness.

And other experiment is carried out with assessment and is formed on the influence of other shape factor of the depression 139 on the development sleeve 132 to paper conveyance direction epigraph density unevenness evenness.Particularly, act on current value and frequency on the solenoid 8, can in experimental example 1 to 8 and contrast experiment 9 and 10, carry out handling according to the surperficial roughening of illustrative examples by change.As shown in figure 18, depression 139 has imaginary line section La and radius section Lb.The rotation center P of imaginary line section La autography sleeve 132 extends to the peripheral end portion 200a of depression 139.Radius section Lb is development sleeve 132 external diameters-half.Act on current value and frequency on the solenoid 8 by change, the development sleeve with difference " La-Lb " value is prepared so that with above-mentioned sensory evaluation's method paper conveyance direction epigraph density unevenness evenness is assessed.Table 1 has shown these result of experiment equally.

Experimental example 6:

The preparation of development sleeve 132 is similar to experimental example 1.Handle when carrying out when this surperficial roughening, it is that 20A and frequency are the electric power of 450Hz that solenoid 8 is applied current value, and the processing time that this surperficial roughening is handled be 30 seconds, the amount of magnetic abrasive grain 65 is 50g.After this, using the rotating speed rotation development sleeve 132 of rotary machine with 1480rpm (revolution of per minute), is that the belt of #400 was expressed on the surface of development sleeve 132 for 5 seconds with the surface of polishing development sleeve 132 with the power of 10kgf with surfaceness.Carry out the polishing of this band with the outward flange 200a of scraping depression 139 to reduce imaginary line section La.

Experimental example 8:

The preparation of development sleeve 132 is similar to experimental example 1.Handle when carrying out when this surperficial roughening, it is that 20A and frequency are the electric power of 450Hz that solenoid 8 is applied current value, and the processing time that this surperficial roughening is handled be 30 seconds, the amount of magnetic abrasive grain 65 is 50g.After this, using the rotating speed rotation development sleeve 1 32 of rotary machine with 1480rpm (revolution of per minute), is that the belt of #400 was expressed on the surface of development sleeve 132 for 20 seconds with the surface of polishing development sleeve 132 with the power of 10kgf with surfaceness.Carry out the polishing of this band with the outward flange 200a of scraping depression 139 to reduce imaginary line section La.

The contrast experiment 9:

The preparation of development sleeve is similar to experimental example 1.Handle when carrying out when this surperficial roughening, it is that 20A and frequency are the electric power of 450Hz that solenoid 8 is applied current value, and the processing time that this surperficial roughening is handled be 30 seconds, the amount of magnetic abrasive grain 65 is 50g.

The contrast experiment 10:

The preparation of development sleeve is similar to experimental example 1.Handle when carrying out when this surperficial roughening, it is that 20A and frequency are the electric power of 450Hz that solenoid 8 is applied current value, and the processing time that this surperficial roughening is handled be 30 seconds, the amount of magnetic abrasive grain 65 is 50g.After this, using the rotating speed rotation development sleeve 132 of rotary machine with 1480rpm (revolution of per minute), is that the belt of #400 was expressed on the surface of development sleeve 132 for 23 seconds with the surface of polishing development sleeve 132 with the power of 10kgf with surfaceness.Carry out the polishing of this band with the outward flange 200a of scraping depression 139 to reduce imaginary line section La.

Use the development sleeve of so preparing, the image color unevenness on the paper conveyance direction is assessed with above-mentioned sensory evaluation's method.This result of experiment has been shown in the table 1, has wherein also shown the length of cave in 139 " La-Lb ".By extract a plurality of depressions 139 as sample then the length of mean sample depression 139 can measure the length of " La-Lb ".

And, for the length of confirming " La-Lb " and the relation between the image color unevenness, by development sleeve is carefully carried out surface treatment, set " La-Lb " parameter in addition (as oval-shaped long axis length, oval-shaped minor axis length, the degree of depth of depression, angle [alpha] and β) similar to the value in the development sleeve of preparing, these parameters can not impact the result thus.

As shown in table 1, compare with the development sleeve of preparing among the contrast experiment 9 and 10 who after 10000 paper are printed, has standard B 132, the development sleeve of preparing in the experimental example 1 to 8 132 does not almost have image color inhomogeneous (as standard A) on paper conveyance direction, this is good result.

Therefore,, can confirm when the frequency setting of rotating magnetic field is 200Hz to 400Hz that the imaginary line section La that has on the development sleeve 132 has relational expression " 20 μ m 〉=La-Lb＞5 μ m " greater than the depression 139 of radius section Lb according to experimental example 1 to 5.

And, although the angle [alpha] in the experimental example 6 to 8 is similar to the angle [alpha] in contrast experiment 9 and 10, can confirm that experimental example 6 to 8 factors owing to " La-Lb " show the good result of image color.According to this result, can confirm when having the depression 139 of imaginary line section La and have relational expression " 20 μ m 〉=La-Lb＞5 μ m ", can control or prevent the image color unevenness in the paper transmission direction greater than radius section Lb.

If " La-Lb " becomes excessive (as La-Lb＞20 μ m), the edge that is located at the peripheral end portion 200a of depression 139 back location more likely weares and teares, grinds away or tears to shreds, and the amount of the developer that carries on the outside surface of development sleeve 132 reduces in time thus.

The laser focusing gearshift " LT-8010 " that concavo-convex cross sectional shape on the outside surface of development sleeve 132 is made with KEYENCE CORPORATION is along measuring on three points in one week of development sleeve.Measuring condition comprises sample number 18000, sampling frequency 1800Hz, displacement function, average measurement 2 times, the routine measurement pattern, and no darkness gradual change (state that brightness gradually changes to both sides from the centre, darkout), nothing is sheltered, no Transparent Parts, and minimum light density is 130.With this understanding, calculate the length of angle [alpha] and " La-Lb ".

Shown in Figure 10 and 11, for example, above-mentioned imaging device 101 comprises handle box 106Y, 106M, 106C, and 106K, and each handle box 106Y, 106M, 106C, and 106K comprises box shell 111, charging roller 109, photosensitive drums 108, cleaning blade 112, and developing cell 113.Yet, in illustrative examples, handle box 106Y, 106M, 106C, and 106K can comprise all subelements or device except that developing cell 113.Therefore, for example, box shell 111, charging roller 109, photosensitive drums 108, cleaning blade 112 can be from handle box 106Y, 106M, 106C, and omit among the 106K.And, although imaging device 101 comprises the handle box 106Y that is removably mounted on the imaging device 101,106M, 106C, and 106K, handle box 106Y, 106M, 106C, and 106K also can omit from imaging device 101.At this moment, for example, imaging device 101 can comprise the developing cell 113 as detachable unit.

And, in illustrative examples, the external diameter of development sleeve 132, the size of magnetic abrasive grain 65, the external diameter of the column 50 of container unit 9 can be changed into arbitrary value as required.And, development sleeve 132 is in the surface configuration at its two ends, and the geomery of bending radius and magnetic abrasive grain 65 is according to Several Factors such as desired surface roughness, the processing time (treatment conditions), solenoid 8 move back and forth number of times, the persistence isopreference ground of magnetic abrasive grain 65 is selected and decision.And the total amount of the magnetic abrasive grain 65 that holds in the container unit 9 is according to Several Factors such as desired surface roughness, the processing time (treatment conditions), solenoid 8 move back and forth number of times, the persistence isopreference ground decision of magnetic abrasive grain 65.

Can carry out modification and variation outside a plurality of according to above-mentioned aim.Therefore, be appreciated that in the scope of appended claims, of the present inventionly openly can implement to be different from specific descriptions herein.For example, in the scope of appended claims, the parts of different instances and illustrative examples and/or characteristic can make up mutually or replace.

Claims (12)

1. a magnetic particle carrying device is characterized in that, comprising:

Magnetic field generator, this magnetic field generator is configured to produce magnetic field; And

Hollow cylindrical structure, this hollow cylindrical structure is configured to surround described magnetic field generator, and utilizes magnetic field magnetic-particle to be attracted on the outside surface of described hollow cylindrical structure,

Have two types a plurality of oval depression that is formed on wherein on the outside surface of described hollow cylindrical structure,

The major axis of the oval depression of the first kind is in fact along the extending axially of described hollow cylindrical structure,

The major axis of the oval depression of second type extends along the circumferencial direction of described hollow cylindrical structure in fact,

The oval depression of described second type that has on the outside surface of described hollow cylindrical structure is more than the oval depression of the described first kind.

2. magnetic particle carrying device as claimed in claim 1 is characterized in that wherein said depression is formed on the outside surface of described hollow cylindrical structure randomly.

3. magnetic particle carrying device as claimed in claim 1, it is characterized in that, wherein the angle [alpha] that is formed by imaginary line L1 and imaginary line L2 is less than 45 °, bottom of each the oval depression of described imaginary line L1 from described a plurality of oval depressions extends radially outwardly along described hollow cylindrical structure, and the bottom of the oval depression of described imaginary line L2 each from described a plurality of oval depressions extends out to each oval depression in described a plurality of oval depressions with respect to the back edge of the sense of rotation of described hollow cylindrical structure.

4. magnetic particle carrying device as claimed in claim 3 is characterized in that, extends to antemarginal imaginary line section La and the satisfied 20 μ m 〉=La-Lb of radius line segment Lb＞5 μ m of described depression from the rotation center of described hollow cylindrical structure.

5. an imaging device is characterized in that, comprising:

Latent image carrier, this latent image carrier are configured to carry on it sub-image;

Charger, this charger is configured to the surface charging to described latent image carrier;

Register, this register are configured to write down sub-image on described latent image carrier; And

Developing cell, this developing cell are used for comprising by the developer described sub-image that develops:

Magnetic particle carrying device comprises:

Magnetic field generator, this magnetic field generator is configured to produce magnetic field; And

Hollow cylindrical structure, this hollow cylindrical structure is configured to surround described magnetic field generator, and utilizes magnetic field that magnetic-particle is attracted on the described hollow cylindrical structure outside surface,

Have a plurality of oval depressions of two types that are formed on wherein on the outside surface of described hollow cylindrical structure,

The major axis of the oval depression of the first kind is in fact along the extending axially of described hollow cylindrical structure,

The major axis of the oval depression of second type extends along the circumferencial direction of described hollow cylindrical structure in fact,

The oval depression of described second type that has on the outside surface of described hollow cylindrical structure is more than the oval depression of the described first kind.

6. imaging device as claimed in claim 5 is characterized in that described developer comprises toner particle and magnetic-particle, and described magnetic-particle has the average particulate diameter of 20 μ m to 50 μ m.

7. imaging device as claimed in claim 5 is characterized in that, described developing cell is configured to be removably mounted on the handle box in the described imaging device.

8. the method that roughening is carried out on the surface of target object is characterized in that, comprising:

Around target object, produce the magnetic field of rotation; And

Under the effect of the rotating magnetic field of frequency, a plurality of cylindrical abrasive particles are pressed on the outside surface of described target object with 200Hz to 400Hz.

9. method as claimed in claim 8 is characterized in that described rotating magnetic field is produced by solenoid.

10. method as claimed in claim 8 is characterized in that, described compaction step is pressed to described abrasive particle on the outside surface of described target object randomly along all directions in fact simultaneously.

11. method as claimed in claim 8 is characterized in that, by described target object axially on change the intensity of described rotating magnetic field, described compaction step is pressed to described abrasive particle on the outside surface of described target object randomly.

12. method as claimed in claim 11 is characterized in that, the intensity of described rotating magnetic field is set at change greatly from the central part of described target object to each end of described target object in the axial direction changeably.

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