CN100447681C - Fixing apparatus - Google Patents
Fixing apparatus Download PDFInfo
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- CN100447681C CN100447681C CNB2004800290051A CN200480029005A CN100447681C CN 100447681 C CN100447681 C CN 100447681C CN B2004800290051 A CNB2004800290051 A CN B2004800290051A CN 200480029005 A CN200480029005 A CN 200480029005A CN 100447681 C CN100447681 C CN 100447681C
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Abstract
In a fixing apparatus 200 using an induction heating type of heating apparatus, there are provided an excitation apparatus 230 that generates magnetic flux, an opposed core 233 located opposite excitation apparatus 230, a fixing belt 210 that is induction-heated by the aforementioned magnetic flux, and magnetism masking elements 301 that block magnetic paths 302 corresponding to paper non-passage areas of fixing belt 210 between excitation apparatus 230 and opposed core 233. By blocking magnetic paths between excitation apparatus 230 and opposed core 233 by means of magnetism masking elements 301, magnetic flux that induction-heats fixing belt 210 is effectively masked, and an excessive rise in temperature of paper non-passage areas of fixing belt 210 is prevented.
Description
Technical field
The present invention relates to be used in useful fixing device on the video generation device of duplicating machine, facsimile recorder and printer etc. of electrophotography mode or electrostatic recording mode, the heating means that particularly relate to use electromagnetic induction heating mode are carried out the fixing device of heat fixer to the image of not photographic fixing on recording medium.
Background technology
Electromagnetic induction heating (IH; Induction heating) fixing device of mode, for heater element, make and utilize magnetic field to generate the magnetic field that parts generate, the generation eddy current of having an effect, by the joule heating that utilizes this eddy current on described heater element, to produce, the uncertain image on the recording mediums such as transfer paper and OHP film is carried out heat fixer.
The fixing device of this electromagnetic induction heating mode is compared with the fixing device that with the Halogen lamp LED is the hot-rolling mode of thermal source, has the heating efficiency height, can accelerate the advantage of fixation rate.
In addition, known to the crowd, as described heater element, fixing device uses the thin-walled heater element that is made of the sleeve (sleeve) of thin-walled or endless etc.Such fixing device, the thermal capacity of heater element is little, can make the heating of this heater element at short notice, and its result can improve the startup responsiveness significantly generating heat before the fixing temperature of regulation.
On the other hand, used the fixing device of the little heater element of such thermal capacity,, the temperature by paper areas has been descended even just also will take away the heat of heater element by the paper records medium.Therefore, in this fixing device, heater element is heated in good time, so that make temperature maintenance by paper areas on the fixing temperature of regulation.
Therefore, in the fixing device that has used the little heater element of this thermal capacity, if paper is continuously by the little recording medium of size, it is lasting overheated heater element to occur, it does not become than the high more singularly phenomenon of temperature by paper areas by the temperature of paper areas, produces the excessive intensification phenomenon of not passing through paper areas in other words.
As everyone knows, as the technology of not passing through the excessive intensification phenomenon of paper areas existing, that releasing is such, utilization transportable magnetic flux absorption component on the heating Width of heater element absorb in the magnetic flux that generates according to the excitation unit that makes heater element electromagnetic induction heating, only act on the not magnetic flux (for example, with reference to patent document 1) by paper areas of described heater element.
In addition, as everyone knows, as removing the described other technologies of not passing through the excessive intensification phenomenon of paper areas, behind at the 1st magnetic material iron core of the excitation unit that makes heater element electromagnetic induction heating, configuration is corresponding to the 2nd magnetic material iron core that does not pass through paper areas, and make the 1st magnetic material gap unshakable in one's determination and the 2nd magnetic material iron core change, change the Temperature Distribution longitudinally (for example, with reference to patent documentation 2) of heater element.
Fig. 1 is the summary side elevation of the embodiment of disclosed fixing device in patent documentation 1.As shown in Figure 1, this fixing device possess coil block 10 arranged, metal sleeve 11, carriage (holder) 12, backer roll 13, flux shield plate 31 and shift unit 40 etc.
In Fig. 1, coil block 10 produces high frequency magnetic field.Metal sleeve 11, the induction current that is produced by the inductive coil 18 of coil block 10 heats, rotates on the direction that transmits recording materials 14.Coil block 10 is maintained at the inside of carriage 12.Carriage 12 is fixed on the not shown fixation unit framework again, does not rotate.Backer roll 13 is crimped on the metal sleeve 11, while form nip part, rotate transmitting on the direction of recording materials 14.By utilizing this nip part clamping to transmit recording materials 14, utilize the metal sleeve 11 of heating on the recording materials 14 the uncertain image on the recording materials 14 being carried out heat fixer.
When recording materials 14 are of a size of full-size, utilize shift unit 40 to move flux shield plate 31, dodge on the position of representing with solid line among Fig. 1.On the other hand, when recording materials 14 were of a size of small size, mobile flux shield plate 31 was so that enter the position of representing with dot-and-dash line among Fig. 1.Thus, shield from inductive coil 18 to the magnetic flux of not launching of metal sleeve 11, the excessive intensification that paper areas is not passed through in inhibition by paper areas.
Fig. 2 A, Fig. 2 B are the summary sections of the embodiment of disclosed fixing device in patent documentation 2.Shown in Fig. 2 A, Fig. 2 B, this fixing device has heating component 51, carriage 52, revolving member 53, field coil the 54, the 1st iron core the 55, the 2nd iron core 56, fixing roller 57 and the backer roll 58 etc. of keeping unshakable in one's determination.
In Fig. 2 A, Fig. 2 B, heating component 51 is to be made of carriage 52, revolving member 53, field coil the 54, the 1st the 55 and the 2nd iron core 56 unshakable in one's determination of keeping unshakable in one's determination, produces magnetic flux.Fixing roller 57 is according to the sensed heating of effect of the magnetic flux that is produced by heating component 51, rotate on the direction that transmits recording materials 59.
The 1st iron core 55 has the identical width of width that passes through paper areas with the maximum of fixing roller 57.On the other hand, the 2nd iron core 56 when recording materials 59 are of a size of full-size, shown in Fig. 2 A, is moved on the position near the 1st iron core 55.In addition, the 2nd iron core 56 when recording materials 59 are of a size of small size, shown in Fig. 2 B, unshakable in one's determination keep revolving member 53 Rotate 180s °, is moved on the position of separating with the 1st iron core 55.Thus, suppress the not heating by paper areas corresponding to the fixing roller 57 of the 2nd iron core 56.
" patent documentation 1 " Japanese patent application 10-74009 communique
" patent documentation 2 " Japanese patent application 2003-123961 communique
Summary of the invention
But, disclosed fixing device in patent documentation 1, owing to be to utilize shift unit 40 with the gap of flux shield plate 31 with respect to the both ends of coil block 10 and carriage 12, the mobile structure of advancing and retreat, so as shown in Figure 1, a pair of pulley 36 of shift unit 40 is from the high projection in the both ends of carriage 12, the fixing device body is become maximized inconvenience.In addition, disclosed fixing device in patent documentation 1 as shown in Figure 1, is that flux shield plate 31 is configured in the metal sleeve 11 of magnetic material formation and the structure between the inductive coil 18.Answer in the heating type fixing apparatus at usability, need keep the narrow of gap between inductive coil 18 and the metal sleeve 11, for example about 1mm, and improve magnetic couplings.Because flux shield plate 31 is inserted in its narrow gap, so need to reduce its thickness.In a word, exist,, cause self problem of heating easily so it is big that resistance becomes because flux shield plate 31 can not be got enough thickness.Though by on flux shield plate 31, forming through hole 35, the heating that can suppress to produce, magnetic flux arrival metal sleeve 11 thus, not the generating heat of metal sleeve by paper areas by eddy current.Its result, if 14 continuous the passing through of undersized recording materials, just have so-called heat savings metal sleeve 11 not by paper areas on, can not suppress the problem that excessively heats up.
In addition, disclosed fixing device in patent documentation 2, shown in Fig. 2 A, Fig. 2 B, because keep the rotation of revolving member 53 according to iron core, even the 2nd iron core 56 is with respect to the 1st 55 displacements unshakable in one's determination, the the 1st unshakable in one's determination 55 and the interval of fixing roller 57 do not change yet, so, fixing roller 57 pass through paper areas and the magnetism gap by paper areas keep necessarily.
Therefore, this fixing device produces from rotating to the not magnetic flux of the end by paper areas corresponding to the 2nd iron core 56 corresponding to the end of pass through paper areas of the 1st iron core 55, has reduced the inhibition effect of passing through the magnetic flux on the paper areas at fixing roller 57.Its result, in this fixing device, if undersized recording materials 59 pass through continuously, just have so-called heat savings fixing roller 57 not by paper areas on, can not effectively suppress the problem that excessively heats up.
In addition, in this fixing device, because keep revolving member 53 can only keep the 2nd iron core 56 corresponding to a kind of recording materials size at iron core, so, be merely able to paper width with 2 kinds of recording materials that pass through paper areas width correspondence full-size and minimum dimension of fixing roller 57.
The objective of the invention is to be to provide a kind of in view of foregoing, can eliminate from generating component pass through paper areas to the not magnetic flux rotation by paper areas, and prevent the described small-sized fixing device that does not excessively heat up by paper areas.
Fixing device of the present invention comprises: the magnetic flux generation unit produces magnetic flux; Heater element is made of the nonmagnetic electric conductor of thin-walled, and described magnetic flux passes and carries out induction heating; At least one magnetism shielding element shields described magnetic flux; And the magnetic flux adjustment unit, switch shielding and the release of not passing through the magnetic flux of paper areas for described heater element.Wherein, with respect to described heater element, described magnetism shielding element is configured in the opposition side of described magnetic flux generation unit.
According to the present invention, can seek the miniaturization of device, and can eliminate from the paper areas of passing through of heater element and rotate to the magnetic flux that does not pass through paper areas, prevent the described excessive intensification of not passing through paper areas.
The simple declaration of accompanying drawing
Fig. 1 represents the summary side elevation of existing fixing device structure;
Fig. 2 A represents the summary section of the pith structure of existing other fixing devices;
Fig. 2 B represents the summary section of the operating state of existing other fixing devices;
Fig. 3 represents the integrally-built summary section of video generation device that is suitable for loading fixing device that embodiments of the present invention 1 relate to;
Fig. 4 represents the sectional view of the basic structure of the fixing device that embodiments of the present invention 1 relate to;
Fig. 5 represents the summary section of the pith structure of the fixing device that embodiments of the present invention 1 relate to;
Fig. 6 is illustrated in the summary side elevation that is provided with the structure of magnetism shielding element on the iron core in opposite directions of the fixing device that embodiments of the present invention 1 relate to;
Fig. 7 represents the summary side elevation of the structure of the shift unit that the magnetism shielding element of fixing device that embodiments of the present invention 1 are related to is shifted;
Fig. 8 represents that the magnetism shielding element of fixing device that embodiments of the present invention 1 are related to is displaced to the summary section of the state of magnetic circuit rest position;
Fig. 9 represents the summary section of structure of the pith of the fixing device that embodiments of the present invention 2 relate to;
Figure 10 represents the summary section of structure of the pith of the fixing device that embodiments of the present invention 3 relate to;
Figure 11 represents the summary section of structure of the pith of the fixing device that embodiments of the present invention 4 relate to;
Figure 12 represents the summary section of the structure of the fixing device that embodiments of the present invention 5 relate to;
Figure 13 is illustrated in the summary side elevation that is provided with the structure of magnetism shielding element on the iron core in opposite directions of the fixing device that embodiments of the present invention 6 relate to;
Figure 14 represents the summary side elevation of the structure of the shift unit that the magnetism shielding element of fixing device that embodiments of the present invention 6 are related to is shifted;
Figure 15 represents that the magnetism shielding element of fixing device that embodiments of the present invention 6 are related to is displaced to the summary section of the state of magnetic circuit rest position;
Figure 16 represents the summary section of the pith structure of the fixing device that embodiments of the present invention 7 relate to;
Figure 17 represents the summary section of the pith structure of the fixing device that embodiments of the present invention 8 relate to;
Figure 18 represents the summary side elevation of the structure of the shift unit that the otch unshakable in one's determination in opposite directions of fixing device that embodiments of the present invention 8 are related to is shifted;
Figure 19 represents the summary section of the pith structure of the fixing device that embodiments of the present invention 9 relate to;
Figure 20 is illustrated in the structural drawing that has embedded the pith of electric conductor in the otch unshakable in one's determination in opposite directions of the fixing device that embodiments of the present invention 10 relate to;
The recess unshakable in one's determination in opposite directions that Figure 21 is illustrated in fixing device has embedded the summary section of structure of the pith of electric conductor;
Figure 22 represents the summary side elevation of magnetism shielding element unshakable in one's determination in opposite directions that the paper pass-through mode with A3 size recording chart of the fixing device that embodiments of the present invention 11 relate to is corresponding;
Figure 23 represents to cut the summary section of representing on Figure 22 of the structure of the pith of fixing device unshakable in one's determination in opposite directions according to the E face;
Figure 24 represents the summary side elevation of magnetism shielding element unshakable in one's determination in opposite directions that the paper pass-through mode with B4 size recording chart of the fixing device that embodiments of the present invention 11 relate to is corresponding;
Figure 25 A represents to cut the summary section of representing on Figure 24 of the structure of the pith of fixing device unshakable in one's determination in opposite directions according to the F face;
Figure 25 B represents to cut the summary section of representing on Figure 24 of the structure of the pith of fixing device unshakable in one's determination in opposite directions according to the G face;
Figure 26 represents the summary side elevation of magnetism shielding element unshakable in one's determination in opposite directions that the paper pass-through mode with A4 size recording chart of the fixing device that embodiments of the present invention 11 relate to is corresponding;
Figure 27 A represents to cut the summary section of representing on Figure 26 of the structure of the pith of fixing device unshakable in one's determination in opposite directions according to the H face;
Figure 27 B represents to cut the summary section of representing on Figure 26 of the structure of the pith of fixing device unshakable in one's determination in opposite directions according to the I face;
Figure 28 represents the summary side elevation of magnetism shielding element unshakable in one's determination in opposite directions that the paper pass-through mode with A5 size recording chart of the fixing device that embodiments of the present invention 11 relate to is corresponding;
Figure 29 A represents to cut the summary section of representing on Figure 28 of the structure of the pith of fixing device unshakable in one's determination in opposite directions according to the J face;
Figure 29 B represents to cut the summary section of representing on Figure 28 of the structure of the pith of fixing device unshakable in one's determination in opposite directions according to the K face;
Figure 30 represents that 2 magnetism shielding elements have each summary section of the pith structure of the fixing device of the length by paper areas of corresponding A 4 dimension width and B4 dimension width;
Figure 31 A represents the summary section of incision site unshakable in one's determination in opposite directions that the paper pass-through mode with A3 size recording chart of the fixing device that embodiments of the present invention 11 relate to is corresponding;
Figure 31 B represents the summary section of incision site unshakable in one's determination in opposite directions that the paper pass-through mode with B4 size recording chart of fixing device is corresponding;
Figure 31 c represents the summary section of incision site unshakable in one's determination in opposite directions that the paper pass-through mode with A4 size recording chart of fixing device is corresponding;
Figure 32 has represented in the internal configurations unshakable in one's determination in opposite directions shown in Figure 31 A, B, the C summary section of structure of pith of the fixing device of magnetism shielding element;
Figure 33 represents the summary sectional view of the structure of the fixing device that embodiments of the present invention 12 relate to;
Figure 34 represents the summary side elevation that passes through paper areas magnetism shielding element unshakable in one's determination in opposite directions of the fixing device that embodiments of the present invention 12 relate to;
Figure 35 represents the summary sectional view of the structure of the fixing device that embodiments of the present invention 13 relate to;
Figure 36 represents the summary section of structure of the magnetic flux controls of the fixing device that embodiments of the present invention 13 relate to;
Figure 37 represents the summary side elevation of structure of the flux regulator unit of the fixing device that embodiments of the present invention 13 relate to;
Figure 38 represents the summary section of structure of the backing roll of the fixing device that embodiments of the present invention 14 relate to;
Figure 39 represents the summary section of structure of other backing rolls of the fixing device that embodiments of the present invention 14 relate to;
Figure 40 represents the summary section of structure of the backing roll of the fixing device that embodiments of the present invention 15 relate to;
Figure 41 represents the summary section of structure of the backing roll of the fixing device that embodiments of the present invention 16 relate to;
Figure 42 represents to constitute the summary side elevation of sheet material of the backing roll of the fixing device that embodiments of the present invention 16 relate to; And
Figure 43 represents the summary section of the structure of the fixing device that embodiments of the present invention 17 relate to.
Embodiment
Main points of the present invention are to be provided with the magnetism shielding element that does not pass through the corresponding magnetic circuit of paper areas that discharges with described magnetic flux generation unit and described described heater element between the iron core in opposite directions by reaching, this element with the magnetic flux generation unit and unshakable in one's determination in opposite directions between the mode that moves freely be configured, and relatively move with respect to described magnetic flux generation unit along the moving direction of the heater element that passes magnetic flux.
Below, for embodiments of the present invention, at length describe with reference to accompanying drawing.In addition, in each accompanying drawing, have on the textural element and considerable part with spline structure or function, mark same symbol, no longer repeat its explanation.
(embodiment 1)
Fig. 3 is the integrally-built summary section that expression is suitable for loading the video generation device of the fixing device that embodiments of the present invention 1 relate to.
As shown in Figure 3, video generation device 100 has electrophotography photodetector (below be called " sensitization magnetic drum ") 101, charged device 102, laser beam scanner 103, developer 105, paper feed 107, fixing device 200 and cleaning device 113 etc.
In Fig. 3, sensitization magnetic drum 101 is driven in rotation with the direction of predetermined circumference speed along arrow on one side, on one side its surface similarly charged on the dark potential VO of negative regulation according to charged device 102.
Thus, negative pole on developer roll 106 (minus) is gone up charged toning coating material only on the part attached to the surperficial bright current potential VL of sensitization magnetic drum 101, the electrostatic latent image discharged-area development that forms on sensitization magnetic drum 101 surfaces generates uncertain tone look coating image on sensitization magnetic drum 101.
On the other hand, paper feed 107 utilizes paper feed roller 108 timing according to the rules to send into recording chart 109 as recording medium one by one.The recording chart of being sent into by paper feed 107 109 is through (resist) roller of a pair of stopping 110, according to being sent to the nip part of sensitization magnetic drum 101 and transfer roll 112 with the synchronous suitable timing of the rotation of sensitization magnetic drum 101.Thus, the uncertain tone look coating image 111 above the sensitization magnetic drum 101 is transferred on the recording chart 109 by the transfer roll 112 that utilizes the external pressure transfer bias.
Like this, just generate the recording chart 109 that keeps uncertain tone look coating image 111,, after 101 separation of sensitization magnetic drum, transmit to the photographic fixing position of fixing device 200 by 114 guiding of recording chart guide piece.200 pairs of fixing devices are sent to the uncertain tone look of the recording chart 109 heat fixers coating image 111 at this photographic fixing position.
Heat fixer the recording chart 109 of uncertain tone look coating image 111, behind fixing device 200, be discharged on the discharge tray 116 that is arranged on video generation device 100 outsides.
On the other hand,, remove its surperficial residue such as the residual toning coating material of transfer printing, repeat to offer following image and generate usefulness by cleaning device 113 to the sensitization magnetic drum 101 after recording chart 109 separation.
Below, the fixing device that present embodiment relates to by enumerating object lesson, is described in detail further.Fig. 4 is the basic structure sectional view of the fixing device that relates to of expression present embodiment.As shown in Figure 4, fixing device 200 has the backer roll 250 of photographic fixing band 210, the backing roll 220 as the band supporting member, the excitation unit 230 as electromagnetic induction heater, fixing roller 240 and conduct band rotary setting etc.
In Fig. 4, photographic fixing band 210 is suspended on backing roll 220 and the fixing roller 240.Backing roll 220 usefulness axle rotates on the upper end of the body side plate 201 that is bearing in fixing device 200 freely.The rotation of fixing roller 240 usefulness axle is bearing on the swing plate 203 freely, and swing plate 203 utilizes minor axis 202 to shake and is installed in freely on the body side plate 201.Backer roll 250 usefulness axle rotates on the lower end of the body side plate 201 that is bearing in fixing device 200 freely.
The twisted wire that fine rule has been tied up in use constitutes field coil 231, in order to cover the periphery of the photographic fixing band 210 that is suspended on the backing roll 220, section shape is made semicircle.In field coil 231, be the exciting current of 25KHz from not shown field circuit external pressure driving frequency.Between unshakable in one's determination 232 and in opposite directions unshakable in one's determination 233, produce AC magnetic field like this, produce eddy current, make 210 heatings of photographic fixing band at the conductive layer of photographic fixing band 210.In addition in this example, though be the structure of photographic fixing band 210 heatings,, also can be to make backing roll 220 generate heat, again the heat of this backing roll 220 is transmitted to the structure of photographic fixing band 210.
Unshakable in one's determination 232 are set on the part at the center of field coil 231 and the back side thereof.As unshakable in one's determination 232 and unshakable in one's determination 233 material in opposite directions, except ferrite, can also use the material of high permeability such as permalloy.
This fixing device 200, as shown in Figure 4, by the recording chart 109 of uncertain tone look coating image 111 that transmitted transfer printing according to the direction of arrow, make the maintenance face of uncertain tone look coating image 111 touch photographic fixing band 210, just can be on recording chart 109 the heat fixer toning coating material image 111 of photographic fixing not.
In addition, at the back side of crossing with the photographic fixing band 210 of the part of the contact site of backing roll 220, the temperature sensor 260 that is made of thermistor is set in the mode of contact.Utilize this temperature sensor 260 to detect the temperature of photographic fixing band 210.The output of temperature sensor 260 is provided for not shown control device.Control device is according to the output of temperature sensor 260, and control offers the power of field coil 231 by described field circuit, so that become only image fixing temperature, controls the thermal value of photographic fixing band 210 thus.
In addition, above the part of the fixing roller 240 direction of transfer downstream end, photographic fixing band 210 of recording chart 109, row's paper guide piece 270 of the recording chart 109 that is through with to discharge tray 116 guiding heat fixers is being set at suspension.
In field coil 230, also be provided with as retaining member and with field coil 231 and the 232 coil guide pieces 234 that become one unshakable in one's determination.This coil guide piece 234 is made of high resins of heat resisting temperature such as PEEK material or PPS.This coil guide piece 234 is full of the heat by 210 radiation of photographic fixing band in the space between photographic fixing band 210 and field coil 231, can avoid field coil 231 damaged.
In addition, iron core 232 as shown in Figure 4, though its section shape becomes semicircle, shape that should iron core 232 not necessarily need be according to the shape of field coil 231, its section shape for example, also can be roughly the shape of ∏.
In addition, as the material of the matrix of photographic fixing band 210, except above-mentioned polyimide resin, can also use have that fluoride resin etc. has stable on heating resin, metal such as the nickel thin plate that produces by electroforming and stainless sheet steel.For example, this photographic fixing band 210 also can be to be the structure of plating 10 μ m thickness copper on the surface of the SUS430 (magnetic) of 40 μ m or SUS304 (non magnetic) at thickness.
In addition, for carry out following photographic fixing band 210 pass through in the paper Width (backing roll 220 vertically) add heat control, preferably have at least magnetic flux to pass photographic fixing band 210 more than or equal to 50%.For this reason, photographic fixing band 210 preferably is made of the nonmagnetic substance of silver or copper etc.Have again, when constituting photographic fixing band 210, can thickness be reduced (preferably being less than or equal to 50 μ m) as far as possible by magnetic material.For example, when the nickel strap that by thickness is 40 μ m constitutes, during the driving frequency f=25KHz of excitation unit 230, thickness 40 μ m become 1/2 thickness of the skin depth of nickel (Ni) approximately, because about 60% magnetic flux passes photographic fixing band 210, so, carry out the heat control that adds of passing through paper width direction of photographic fixing band 210 easily.
In addition, photographic fixing band 210, as long as though guarantee that when the image heating element of using as the heat fixer of monochrome image uses liftability is just passable, but, when the image heating element of using as the heat fixer of coloured image uses this photographic fixing band 210, preferably form thick rubber layer elasticity is provided.In addition, the thermal capacity of photographic fixing band 210 preferably is less than or equal to 60J/K, more preferably is less than or equal to 40J/K.
Fixing roller 240 is made of the silicon rubber as the flexible foam of tool of the low heat conductivity with skin hardness low (being the JISA30 degree here), diameter 30mm.
; this existing fixing device; as mentioned above; exist because the paper areas of passing through of photographic fixing band keeps certain with the magnetic gap of not passing through paper areas; so generation is rotated to the magnetic flux that does not pass through paper areas from the end by paper areas, the heat savings passing through paper areas and not passing through on the boundary member of paper areas the photographic fixing band; on this boundary member, produce excessive intensification phenomenon, perhaps make the problem of fixing device body maximization and so on.In addition, in existing fixing device, what be merely able to make fixing roller passes through the paper width of paper areas width corresponding to full-size and undersized 2 kinds of recording materials.In addition, the problem that also has the so-called flux shield plate heating that the magnetic flux by paper areas is not shielded.
Therefore, the fixing device 200 that present embodiment 1 relates to as shown in Figure 5, is provided with the magnetism shielding element 301 that is made of the material that can shield magnetism.This magnetism shielding element 301 is configured between excitation unit 230 and unshakable in one's determination in opposite directions 233, and according to the moving direction as the photographic fixing band 210 of the heater element that passes magnetic flux, with respect to excitation unit 230, supporting freely relatively moved.
In the fixing device 200 that present embodiment 1 relates to, magnetism shielding element 301 has the structure with respect to excitation unit 230 displacements.As the supporting member of this magnetism shielding element 301, for example, can use the sleeve (not illustrating) that is entrenched in opposite directions the tubular on unshakable in one's determination 233.In addition, in the fixing device 200 that present embodiment 1 relates to, as shown in Figure 6,, using iron core 233 in opposite directions as the supporting member of magnetism shielding element 301.
In addition, magnetism shielding element 301, according to recording chart 109 pass through paper standard decision in opposite directions unshakable in one's determination 233 the position is set.At this, be central standard with the paper standard of passing through of recording chart 109, as shown in Figure 6, magnetism shielding element 301 is arranged in opposite directions on unshakable in one's determination 233 the both ends.Have again, magnetism shielding element 301, as shown in Figure 6, when being A by the paper areas width with maximum corresponding to the photographic fixing band 210 of maximum sized recording chart, when being B by the paper areas width, has the not length C by paper areas that produces on the both ends of the photographic fixing band 210 corresponding to by the small size recording paper time with small size corresponding to the photographic fixing band 210 of undersized recording chart.
In addition, the fixing device 200 that present embodiment 1 relates to, its backing roll 220 passes the member of magnetic flux by the magnetic flux that does not shield excitation unit 230 generations, for example the nonmagnetic stainless steel material (SUS304) of described intrinsic resistance 72 μ Ω cm constitutes.
In Fig. 5, magnetism shielding element 301, be displaced to excitation unit 230 and unshakable in one's determination in opposite directions 233 between the magnetic circuit rest position (position that dots among Fig. 5) of not ending by the corresponding magnetic circuit 302 of paper areas of photographic fixing band 210 and the magnetic circuit off-position (position of representing with solid line among Fig. 5) that magnetic circuit 302 is discharged.
Fig. 7 is the in opposite directions iron core 233 of expression rotation as the supporting member of magnetism shielding element 301, makes the summary side elevation of the shift unit 500 of magnetism shielding element 301 displacements.This shift unit 500, as shown in Figure 7, by be arranged in opposite directions pinion wheel 501 on unshakable in one's determination 233 the fulcrum, be engaged on gear wheel 502 on the pinion wheel 501, with the incorporate arm 503 of fulcrum of gear wheel 502 and solenoid 504 that arm 503 shakes etc. is constituted.
On Fig. 7, if solenoid 504 becomes connection (energising) state, so, the executive component of solenoid 504 moves, arm 503 just shakes.Because the gear wheel 502 that shakes, makes of this arm 503 rotates, drives pinion wheel 501 driven rotations.Because the driven rotation of this pinion wheel 501, unshakable in one's determination 233 fulcrum rotation in opposite directions, magnetism shielding element 301 are displaced to the described magnetic circuit rest position of representing Fig. 8 from described magnetic circuit off-position.Thus, utilize magnetism shielding element 301 to end corresponding to the not magnetic circuit 302 by paper areas of the photographic fixing band 210 between excitation unit 230 and unshakable in one's determination in opposite directions 233.
On the other hand, become disconnection (no power) state if be in the solenoid 504 of described on-state, arm 503 just returns to the initial position of representing among Fig. 7 so, gear wheel 502, pinion wheel 501 and in opposite directions unshakable in one's determination 233 fulcrum reverse respectively, magnetism shielding element 301 turns back to described magnetic circuit off-position from described magnetic circuit rest position.
Like this, the fixing device 200 that present embodiment 1 relates to, solenoid 504 by on/off (ON/OFF) shift unit 500, utilize magnetism shielding element 301 that the not magnetic circuit 302 by paper areas of the photographic fixing band 210 between corresponding excitation unit 230 and unshakable in one's determination in opposite directions 233 end or discharges, control the magnetic coupling force that passes through paper width direction of photographic fixing band 210 and field coil 231.
That is, when the recording chart 109 that passes through is of a size of full-size, in Fig. 7, solenoid 504 is placed on the state of disconnection, make magnetism shielding element 301 standby on described magnetic circuit off-position.Thus, as shown in Figure 5, the magnetic flux that utilizes excitation unit 230 to produce, flow through in opposite directions unshakable in one's determination 233 Zone Fulls longitudinally, the maximum that acts on photographic fixing band 210 makes the heating of passing through paper width direction of photographic fixing band 210 be distributed in the whole maintenance of the maximum paper areas width A of passing through evenly by paper areas width A integral body.
On the other hand, when the recording chart 109 that passes through is of a size of small size, solenoid among Fig. 7 504 is placed on-state, make magnetic element 301 be displaced to the photographic fixing band 210 between corresponding excitation unit 230 and unshakable in one's determination in opposite directions 233 the magnetic circuit rest position that the magnetic circuit 302 by paper areas not ends.Thus, descend with the not magnetic coupling by the field coil on the paper areas 231 of photographic fixing band 210, the magnetic flux that excitation unit 230 produces, only pass through the position of paper areas B by unshakable in one's determination 233 the small size of representing on Fig. 6 in opposite directions, suppress photographic fixing band 210 not by the heating of paper areas, just can prevent that this from not passing through the excessive intensification of paper areas.
The fixing device 200 that present embodiment 1 relates to constitutes photographic fixing band 210 and magnetism shielding element 301 by the non magnetic electric conductor of silver, copper, aluminium etc.Because it is the structure of thin-walled that photographic fixing band 210 is made with nonmagnetic electric conductor, so resistance becomes big and heating.Again because photographic fixing band 210 is using nonmagnetic substance, so magnetic flux passes photographic fixing band 210 easily.By doing like this, just can dispose magnetism barricade 301 with respect to photographic fixing band 210, on the opposition side of excitation unit 230.In other words, can not need to reduce the thickness of magnetism shielding element, for example, thickness can be increased to about 1mm.Thus, because magnetism shielding element 301 resistance decreasing, so, the heating of magnetism shielding element 301 can be suppressed.In addition, magnetism shielding element 301, because be configured on the iron core 233 in opposite directions that constitutes by temperature conductivity and the high materials such as ferrite of specific heat, so the heat that produces in magnetism shielding element 301 is conducting diffusion on the iron core 233 in opposite directions, thereby the excessive temperature that suppresses magnetism shielding element 301 rises.In addition, magnetism shielding element 301 makes resistance decreasing by increasing thickness, and eddy current becomes and is easy to flow.Thus, repel magnetic field and strengthen, can more effective shielding magnetic flux.Have again, because magnetism shielding element 301 does not need through hole 35, so comparing with the flux shield plate 31 of Fig. 1 can more effective shielding magnetic flux.
The fixing device 200 that present embodiment 1 relates to, such as described, because utilize magnetism shielding element 301 shielding by excitation unit 230 and the magnetic circuit 302 between unshakable in one's determination 233 in opposite directions, so, can effectively shield to photographic fixing band 210 carry out induction heating not by the magnetic flux of paper areas, the magnetic flux that passes through paper areas that can prevent corresponding photographic fixing band 210 is to the not rotation by paper areas.
Like this, in the fixing device 200 that present embodiment 1 relates to, because utilize magnetism shielding element 301 can be effectively by the not magnetic flux by paper areas corresponding to photographic fixing band 210, so, can prevent the excessive intensification that does not cause by the savings of the heat on the paper areas by photographic fixing band 210.
In addition, in the fixing device 200 that present embodiment 1 relates to, because utilize relatively moving of excitation unit 230 and magnetism shielding element 301, magnetic circuit 302 can be ended or discharges, so, device body photographic fixing band 210 pass through do not need on the paper areas Width to make large-scale.
Have again, in the fixing device 200 that present embodiment 1 relates to, because by utilize 301 of magnetism shielding elements by excitation unit 230 and in opposite directions the magnetic circuit 302 between unshakable in one's determination 233, can be by the not magnetic flux by paper areas of corresponding photographic fixing band 210, so, can constitute little magnetism shielding element 301,, 2 magnetism shielding elements 301 can be set at least.Therefore, in this fixing device 200, by the described different magnetism shielding element 301 of length by the paper areas Width is set, what just may make photographic fixing band 210 passes through paper areas width 3 kinds of zones of correspondence at least.
In addition, the fixing device 200 that present embodiment 1 relates to is provided with the excitation unit 230 of direct heat fixer band 210 along the periphery of the photographic fixing band 210 that is suspended in the position on the backing roll 220.Therefore, in this fixing device 200, because backing roll 220 venting capabilities own improve, even backing roll 220 can not become yet and is superheat state when carrying out photographic fixing continuously, so, within permissible range, can suppress the irregular generation of the temperature of passing through paper width direction of photographic fixing band 210 by the temperature difference of the temperature of passing through paper areas of the photographic fixing band 210 that causes from the heat conduction of backing roll 220 and the temperature by paper areas not.
In addition, the backing roll 220 of the fixing device 200 that present embodiment 1 relates to is because be that the thin-wall metal roller of 0.04mm～0.2mm constitutes by thickness, so its thermal capacity becomes very little.Therefore, in this fixing device 200, the heat of photographic fixing band 210 when preheating can significantly be shortened start-up time owing to take away in a large number with contacting of backing roll 220.
Have, the backing roll 220 of the fixing device 200 that present embodiment 1 relates to is because intrinsic resistance is more than or equal to 50 μ Ω cm again, so, eddy current is difficult to flow, and backing roll 220 itself also generates heat hardly, and the electric power of input just effectively is used in the heating of photographic fixing band 210.
Here, when the non-magnetic stainless steel material (SUS304) that by intrinsic resistance is 72 μ Ω cm constitutes backing roll 220, because not conductively-closed of magnetic flux, but pass backing roll 220, so heating is also extremely little even thickness is 0.2mm.In addition, this backing roll 220 can be guaranteed suspension photographic fixing band 210 needed intensity because physical strength is also high, so, can make thin-walled, further reduce thermal capacity, the start-up time in the time of can further shortening preheating.
Have again, when having used the backing roll 220 of the low material of nonmagnetic intrinsic resistance (aluminium, copper etc.),, form and repel magnetic field, so the magnetic flux of intersection photographic fixing band 210 reduces, heating efficiency reduces because produce a large amount of eddy current owing to pass its magnetic flux.In addition, in the backing roll 220 that iron that intrinsic resistance is low in by magnetic material (Fe) and nickel (Ni) etc. constitute, though can guarantee cross flux from photographic fixing band 210,, because because the eddy current that produces makes self-heating, so start-up time is slack-off.
In addition, described intrinsic resistance (the μ Ω cm of unit) is iron: 9.8, aluminium: 2.65, copper: 1.7, nickel: 6.8, magnetic stainless steel (SUS430): 60, non-magnetic stainless steel (SUS304): 72.
(embodiment 2)
Below, the fixing device that relates to for embodiment 2 describes.The iron core 232 of the excitation unit 230 in this fixing device as shown in Figure 9, has the center iron core 701 at the wire turn center that is configured in field coil 231.In addition, the structure of this fixing device is, and is also wideer than the equidirectional width W 2 of center iron core 701 with respect to the width W 1 of the direction that relatively moves of the excitation unit 230 of magnetism shielding element 301.Have, the width W 1 of this magnetism shielding element 301 and the width W 2 of center iron core 701 as shown in Figure 9, also can be stipulated with angle θ 1 and angle θ 2 again.
Thus, in this fixing device, add the effect of the fixing device of embodiment 1, can more effective shielding pass the not magnetic flux by paper areas of photographic fixing band 210, thus can be certain prevent by the excessive intensification that does not cause by the savings of the heat in the paper areas at photographic fixing band 210.
(embodiment 3)
Below, the fixing device that relates to for embodiment 3 describes.This fixing device, as shown in figure 10, the iron core 232 of its excitation unit 230 has the shape that does not have the center iron core.In addition, the structure of this fixing device is, and is also wideer than the equidirectional width W 3 at the wire turn center of the field coil 231 of excitation unit 230 with respect to the width W 1 of the direction that relatively moves of the excitation unit 230 of magnetism shielding element 301.Have, the width W 3 at the width W 1 of this magnetism shielding element 301 and the wire turn center of field coil 231 also can be stipulated with angle again.
Thus, in this fixing device, the fixing device that relates to embodiment 2 similarly, can more effectively shield the not magnetic flux by paper areas that passes photographic fixing band 210, thereby can positively prevent by the excessive intensification that does not cause by the savings of the heat in the paper areas at photographic fixing band 210.
(embodiment 4)
Below, the fixing device that relates to for embodiment 4 describes.This fixing device, as shown in figure 11, its structure is also narrower than the equidirectional wire turn width W 4 at the wire turn position of field coil 231 with respect to the width W 1 of the direction that relatively moves of the excitation unit 230 of magnetism shielding element 301.
Thus, in this fixing device, add the effect of the fixing device that fixing device that embodiment 2 relates to or embodiment 3 relate to, as shown in figure 11, even as the situation of magnetism shielding element 301 with the position in opposite directions, wire turn position of field coil 231, magnetism shielding element 301 also can not be given to flow through by the excitation unit 230 and the magnetic flux of 233 magnetic circuits that form 302 unshakable in one's determination in opposite directions and bring influence with the described magnetic circuit off-position of magnetic element 301.
In other words, in this fixing device, even make magnetism shielding element 301 with the position in opposite directions, wire turn position of field coil 231 on dodge, and make 210 heatings of photographic fixing band, it is irregular also can not to produce temperature at it on by paper areas.Therefore, in this fixing device, can guarantee the position of dodging of more magnetism shielding element 301, just can improve the degree of freedom of the design when a plurality of magnetism shielding element 301 is set.
Herein, from the fixing device that described embodiment 1 relates to embodiment 4, all be with utilize magnetism shielding element 301 by the magnetic circuit rest position of the not magnetic circuit 302 by paper areas of fixing device 210 as magnetism shielding element 301 position relative with the wire turn center of field coil 231.The position relative with the wire turn center of this field coil 231 becomes the position that the magnetic flux between field coil 231 and unshakable in one's determination in opposite directions 233 is concentrated the most.
The fixing device that relates to embodiment 4 from described embodiment 1, such as described, because the relative position, wire turn center of the field coil of concentrating the most with magnetic flux 231, become the magnetic circuit rest position of magnetism shielding element 301, so, can more effectively prevent the excessive intensification of not passing through paper areas of photographic fixing band 210.
(embodiment 5)
Below, the fixing device that relates to for embodiment 5 describes.This fixing device, for example, as shown in figure 12, when being provided with a plurality of magnetism shielding element 301a, 301b, 301c, with wire turn position in opposite directions the position of at least one the magnetic circuit off-position in these magnetism shielding elements as magnetism shielding element 301 and field coil 231.
In this fixing device, in Figure 12, magnetism shielding element 301a is on the state that is positioned at described magnetic circuit off-position, because flow through the influence that is not subjected to magnetism shielding element 301 by the magnetic flux of excitation unit 230 and 233 magnetic circuits that form 302 unshakable in one's determination in opposite directions, so on this state, even make photographic fixing band 210 heating, it is irregular also can not produce temperature on by paper areas at this.
In addition, in this fixing device, because can will leave the position at wire turn position of field coil 231 as other magnetism shielding element 301b, the magnetic circuit off-position of 301c, so, just can easily dispose a plurality of magnetism shielding element 301a, 301b, 301c.
(embodiment 6)
Below, the fixing device that embodiment 6 is related to describes.This fixing device as shown in figure 13, is being provided with a plurality of magnetism shielding element 301a, 301b, 301c in photographic fixing band 210.These magnetism shielding elements 301a, 301b, 301c have the different a plurality of not length by paper areas of the mutual width of corresponding photographic fixing band 210 respectively.
Figure 14 is the iron core 233 in opposite directions of representing a plurality of magnetism shielding element of rotating support 301a, 301b, 301c, the summary side elevation that makes the shift unit 1200 of a plurality of magnetism shielding element 301a, 301b, 301c displacement.This shift unit 1200, as shown in figure 14, by being arranged in opposite directions pinion wheel 1201 on unshakable in one's determination 233 the fulcrum, being engaged on the gear wheel 1202 on the pinion wheel and the stepping motor 1203 that rotates with axle supporting gearwheel 1202 etc. constitutes.
In Figure 14, if stepping motor 1203 becomes connection (energising) state, because rotation gear wheel 1202 rotations of its fulcrum and the 1201 driven rotations of drive pinion wheel.Because the driven rotation of this pinion wheel 1201, unshakable in one's determination 233 fulcrum rotation in opposite directions, the recording chart size and the magnetism shielding element regulation of not passing through the corresponding length of paper areas width that passes through among correspondence magnetism shielding element 301a, 301b, the 301c is displaced to the magnetic circuit rest position from its magnetic circuit off-position.At this as shown in figure 15, magnetism shielding element 301a is displaced to the magnetic circuit rest position from its magnetic circuit off-position.Thus, utilize magnetism shielding element 301a to end corresponding to the not magnetic circuit 302 by paper areas of the photographic fixing band 210 between excitation unit 230 and unshakable in one's determination in opposite directions 233.
On the other hand, make the overall width adstante febre that passes through paper areas of photographic fixing band 210, as shown in figure 12, each magnetism shielding element 301a, 301b, 301c disconnect the energising to stepping motor 1203 respectively on the state that is positioned at described magnetic circuit off-position.
Like this, this fixing device is by the stepping motor 1203 of on/off (ON/OFF) shift unit 1200, utilize each magnetism shielding element 301a, 301b, 301c will with excitation unit 230 and end or discharge of the photographic fixing band 210 between unshakable in one's determination 233 in opposite directions by the corresponding magnetic circuit 302 of paper areas, control the magnetic coupling force that passes through paper width direction of photographic fixing band 210 and field coil 231.
Therefore, in this fixing device, according to the size of the recording chart that passes through, make each magnetism shielding element 301a, 301b, 301c be displaced to the magnetic circuit rest position selectively from described magnetic circuit off-position, the not heating by paper areas according to the recording chart that passes through 109 sizes of photographic fixing band 210 is suppressed, just can prevent the not excessive intensification by paper areas of photographic fixing band 210.Therefore, in this fixing device, utilizing the recording chart 109 of 210 pairs of a plurality of sizes of photographic fixing band to carry out good heat fixer will become possibility.
(embodiment 7)
Below, the fixing device that relates to for embodiment 7 describes.This fixing device, as shown in figure 16, each magnetism shielding element 301a, 301b, 301c are arranged on as with respect to excitation unit 230 in opposite directions on unshakable in one's determination 233 of rotation rotary body freely relatively, and the formation angle initialization of the normal at center separately that will be by 2 magnetism shielding elements adjoining each other is the unspecified angle of 4＜180 ° of 3＜60 ° of 30 °＜θ or 120 °＜θ.
Promptly, this fixing device, as shown in figure 16, the described angle θ 3 of magnetism shielding element 301b and magnetism shielding element 301c is set to 3＜60 ° of 30 °＜θ, and the described angle θ 4 of magnetism shielding element 301a and magnetism shielding element 301b is set to 4＜180 ° of 120 °＜θ.
This fixing device, a plurality of magnetism shielding element 301a, 301b, 301c are respectively the state that is positioned at described magnetic circuit off-position, because flow through each the influence that magnetic flux by excitation unit 230 and unshakable in one's determination in opposite directions 233 magnetic circuits 302 that generate is not subjected to a plurality of magnetism shielding element 301a, 301b, 301c, so, can be suppressed at the irregular generation of the temperature of passing through paper areas that makes photographic fixing band 210 adstante febres on this state.
Here each the magnetism shielding element 301a, 301b, the 301c that are narrated, preferably the electric conductor by low permeability constitutes.Constitute the fixing device of this magnetism shielding element 301a, 301b, 301c by the electric conductor of low permeability, can enough copper or low-cost member such as aluminium constitute magnetism shielding element 301a, 301b, 301c.
In addition, the fixing device that described each embodiment relates to, because used iron core 233 in opposite directions at rotary body as its each magnetism shielding element 301a of supporting, 301b, 301c, so, can simplified structure.
(embodiment 8)
Below, the fixing device that relates to for embodiment 8 describes.This fixing device as shown in figure 17, is to constitute described magnetism shielding element by the otch 1501 that is arranged in opposite directions on unshakable in one's determination 233.The otch 1501 of this fixing device utilizes the shift unit of representing on Figure 18 500, according to the size of the recording chart 109 that passes through, is displaced to described magnetic circuit rest position and magnetic circuit off-position.As this shift unit 500, can use the structure identical with the shift unit represented 500 on Fig. 7.The otch that works as the magnetism shielding element is not 1 in addition, can on each position of the magnetism shielding element 301a that represents on Figure 16,301b, 301c formation be set respectively yet.
This fixing device, because backing roll 220 passes magnetic flux, so, make the position counter-rotating that is arranged on the otch 1501 on the iron core in opposite directions selectively by size according to recording chart 109, absorb or suppress to have passed the magnetic flux of backing roll 220, the heating of passing through paper width direction that can easily control photographic fixing band 210 distributes.
In addition, in this fixing device, because do not need the otch 1501 of described magnetism shielding element is prepared as member in addition, so, simplification that can implementation structure and price cheap.
(embodiment 9)
Below, the fixing device that relates to for embodiment 9 describes.This fixing device as shown in figure 19, is to constitute described magnetism shielding element by the recess 1701 that is arranged in opposite directions on unshakable in one's determination 233.In this fixing device, because the fixing device that relates to embodiment 8 is same, does not need and will prepare as member in addition as the recess 1701 of described magnetism shielding element, so, simplification that can implementation structure and price cheap.
In addition, in this fixing device, as shown in figure 19, even with the magnetic circuit off-position of its magnetism shielding element as the situation of recess 1701 with the position in opposite directions, wire turn position of field coil 231, recess 1701 also not can to flow through by excitation unit 230 and in opposite directions the magnetic flux of the magnetic circuits 302 of 233 generations unshakable in one's determination bring influence.Therefore, in this fixing device, though make recess 1701 with the position in opposite directions, wire turn position of field coil 231 on dodge and make 210 heatings of photographic fixing band because it is irregular also not produce temperature at it on by paper areas, so, the position of dodging that just can guarantee more recess 1701.
(embodiment 10)
Below, the fixing device that relates to for embodiment 10 describes.This fixing device as shown in figure 20, is the structure that is embedded in the electric conductor 1801a of low permeability at described otch 1501.In addition, as shown in figure 21, be the structure that is embedded in the electric conductor 1801b of low permeability at described recess 1701.
In this fixing device, can prevent the decline of the physical strength of iron core 233 in opposite directions that causes by otch 1501 or recess 1701 are set.In addition, by being embedded in electric conductor 1801a or 1801b at described otch 1501 or recess 1701, can making in opposite directions, unshakable in one's determination 233 weight keeps balance.
At this, preferably described electric conductor 1801a or 1801b and unshakable in one's determination in opposite directions 233 surface constitute same.Like this, electric conductor 1801a or 1801b and unshakable in one's determination in opposite directions 233 surface constitute the fixing device of same structure, because equate with becoming to the heat conduction of electric conductor 1801a or 1801b to unshakable in one's determination in opposite directions 233 heat conduction from photographic fixing band 210 from photographic fixing band 210, so the temperature that can prevent to produce photographic fixing band 210 is irregular.
(embodiment 11)
Below, the fixing device that relates to for embodiment 11 describes.This fixing device has described a plurality of magnetism shielding element 301a, 301b, 301c each length by paper areas not of A4 dimension width, A5 dimension width and the B4 dimension width of corresponding photographic fixing band 210 respectively.
Therefore, in this fixing device, for example can comprise: the paper mode of passing through of the recording chart of the A5 size of the paper mode of passing through of the recording chart of the A4 size of the paper mode of passing through of the recording chart of the B4 size of the paper mode of passing through of the recording chart 109 of the A3 size of representing on Figure 22, Figure 23, Figure 24, the last expression of Figure 25 A, B, Figure 26, the last expression of Figure 27 A, B and Figure 28, the last expression of Figure 29 A, B as having 4 kinds of structures by the paper mode.
That is, the situation of passing through the paper mode of the recording chart 109 of A3 size, as shown in figure 23, each magnetism shielding element 301a, 301b, 301c all dodge on described magnetic circuit off-position.Thus, magnetic circuit 302 all is not cut off according to which of each magnetism shielding element 301a, 301b, 301c, the overall width of photographic fixing band 210 (A3 dimension width) pass through the paper areas heating.At this, Figure 23 is the sectional view of representing according on E face cutting Figure 22 unshakable in one's determination in opposite directions.
In addition, the situation of passing through the paper mode of the recording chart 109 of B4 size, as shown in figure 25, in each magnetism shielding element 301a, 301b, 301c, the shortest magnetism shielding element 301c of length is positioned at described magnetic circuit rest position.Thus, magnetic circuit 302 is ended by magnetism shielding element 301c, has only the paper areas of passing through of the B4 width of corresponding photographic fixing band 210 to generate heat.Because magnetism shielding element 301a, 301b dodge on the magnetic circuit off-position, so, can prevent by these temperature of passing through in the paper areas that causes irregular.Here, Figure 25 A is the sectional view of representing according among F face cutting Figure 24 unshakable in one's determination in opposite directions.In addition, Figure 25 B is the sectional view of representing according among G face cutting Figure 24 unshakable in one's determination in opposite directions.
In addition, the situation of passing through the paper mode of the recording chart 109 of A4 size, shown in Figure 27 A, B, in each magnetism shielding element 301a, 301b, 301c, the magnetism shielding element 301a of intermediate length is positioned at described magnetic circuit rest position.Thus, magnetic circuit 302 is ended by magnetism shielding element 301a, has only the paper areas of passing through of the A4 dimension width of corresponding photographic fixing band 210 to generate heat.Because magnetism shielding element 301b, 301c dodge on the magnetic circuit off-position, so, can prevent that the temperature of passing through in the paper areas that is caused by these is irregular.Here, Figure 27 A is the sectional view of representing according on H face cutting Figure 26 unshakable in one's determination in opposite directions.In addition, Figure 27 B is the sectional view of representing according on I face cutting Figure 26 unshakable in one's determination in opposite directions.
In addition, the situation of passing through the paper mode of the recording chart 109 of A5 size, shown in Figure 29 A, B, in each magnetism shielding element 301a, 301b, 301c, the magnetism shielding element 301b that length is the longest is positioned at described magnetic circuit rest position.Thus, magnetic circuit 302 is ended by magnetism shielding element 301b, has only the paper areas of passing through of the A5 dimension width of corresponding photographic fixing band 210 to generate heat.Because magnetism shielding element 301a, 301c dodge on the magnetic circuit off-position, so, can prevent that the temperature of passing through in the paper areas that is caused by these is irregular.Here, Figure 29 A is the sectional view of representing according on J face cutting Figure 28 unshakable in one's determination in opposite directions.In addition, Figure 29 B is the sectional view of representing according on K face cutting Figure 28 unshakable in one's determination in opposite directions.
As shown in figure 30, each that 2 magnetism shielding element 1801c, 1801d are had correspond respectively to A dimension width and B4 dimension width length by paper areas not.In such embodiment, because the surface of magnetism shielding element 1801c, 1801d and unshakable in one's determination in opposite directions 233 constitutes same, so, from photographic fixing band 210 to unshakable in one's determination in opposite directions 233 heat conduction with become to equating to the heat conduction of magnetism shielding element 1801c, 1801d from photographic fixing band 210, so it is irregular to prevent to produce the temperature of photographic fixing band 210.In addition, compare, can strengthen the width W 1 (length of circumferencial direction) of magnetism shielding element with the situation of using 3 magnetism shielding elements.That is to say, can more effectively shield pass photographic fixing band 210 not by the magnetic flux of paper areas, can more positively prevent the excessive intensification that does not cause by the heat in paper areas savings by photographic fixing band 210.
In addition, described various by the paper modes, also can be corresponding even constitute the fixing device of described magnetism shielding element by otch 1501 or recess 1701.Figure 31 A, B, C are 3 kind the summary sections by the state of paper mode of expression when constituting described magnetism shielding element by 2 otch 1501a, 1501b.
In Figure 31 A, B, C, if otch 1501a is equivalent to magnetism shielding element 301a, otch 1501b is equivalent to magnetism shielding element 301c, the recording chart 109 of A3 size is by the situation of paper mode so, shown in Figure 31 A, otch 1501a, 1501b just all dodge on described magnetic circuit off-position.Thus, magnetic circuit 302 is not ended by any one of otch 1501a, 1501b, the overall width of photographic fixing band 210 (A3 dimension width) pass through the paper areas heating.
In addition, the situation of passing through the paper mode of B4 size recording chart 109, shown in Figure 31 B, among each otch 1501a, 1501b, the short otch 1501b of length is positioned at described magnetic circuit rest position.Thus, magnetic circuit 302 is ended by otch 1501, has only the paper areas of passing through of the B4 dimension width of corresponding photographic fixing band 210 to generate heat.
In addition, the situation of passing through the paper mode of A4 size recording chart 109, shown in Figure 31 c, among each otch 1501a, 1501b, the otch 1501a that length is long is positioned at described magnetic circuit rest position.Thus, magnetic circuit 302 is ended by otch 1501a, has only the paper areas of passing through of the A4 dimension width of corresponding photographic fixing band 210 to generate heat.
According to this fixing device, to become possibility as the continuous heat fixer of the A3 sized image of transaction file or A4 sized image and as the continuous heat fixer of the B4 sized image of official document or school's teaching material, use with regard to the fixing device that can be used as multi-functional video generation device.
Shown in figure 32, the magnetism shielding element 301 of the internal configurations tubulose of iron core 233 in opposite directions that also can on Figure 31 A, B, C, represent.In such embodiment, because by on the position of regulation, making 233 rotations unshakable in one's determination in opposite directions, shown in figure 32, by being arranged in opposite directions the otch 1501b on unshakable in one's determination 233, magnetism shielding element 301 and center iron core 701 in opposite directions, so, can more effectively shield magnetic flux.In addition, in this variation, because magnetism shielding element 301 does not need to move, so can fix.Have again, in this variation, though to by rotation unshakable in one's determination in opposite directions 233 by and the example that discharges magnetic circuit be illustrated,, be not limited thereto, can replace in opposite directions unshakable in one's determination 233 with the raise magnetic alloy that just loses magnetism of temperature.If the not temperature by paper areas of photographic fixing band 210 rises, the temperature of magnetic alloy surpasses Curie point, the not magnetic by paper areas of the alloy that just loses magnetism, by magnetism shielding element 301 by the magnetic circuit by paper areas not.In this variation, because automatically carry out discharging of magnetic circuit by reaching, so, the effect that does not need shift unit 500 is arranged.
(embodiment 12)
Below, the fixing device that relates to for embodiment 12 describes.This fixing device as Figure 33 and shown in Figure 34, has the corresponding structure of passing through paper areas magnetism shielding element 2401 of length that has disposed with by the paper areas width on the position of passing through paper areas of corresponding photographic fixing band 210.Should be also littler than the maximum of photographic fixing band 210 by the paper areas width by the paper areas width.
In this fixing device, end magnetic circuit 302 owing to utilize by paper areas magnetism shielding element 2401, can not make and heat up by paper areas.When utilize described magnetism shielding element 301 stop heating photographic fixing band 210 the temperature by paper areas did not become low the time, can utilize the fixing temperature that makes it to be warmed up at short notice regulation by paper areas magnetism shielding element 2401.
(embodiment 13)
Below, the fixing device that relates to for embodiments of the present invention 13 describes.Figure 35 is the summary section of the structure of the fixing device that relates to of expression embodiments of the present invention 13.The fixing device 300 that present embodiment 13 relates to, its backing roll 220 by the member that passes the magnetic flux that excitation unit 230 produces, for example described fixed resistance is that the non-magnetic stainless steel material (SUS304) of 72 μ Ω cm constitutes with not shielding.In addition, this fixing device 300 as shown in figure 35, has absorption or repels the magnetic flux that passes backing roll 220, and the flux regulator unit 310 of the heating distribution of passing through paper width direction (vertically) of control photographic fixing band 210.
This flux regulator unit 310, as Figure 36 and shown in Figure 37, be set at the inside of support roller 220, have on switching shaft 313 configuration corresponding to the small size width control member 311 of the chart width of small size paper (for example A4) size with corresponding to the structure of the breadth extreme control member 312 of the chart width of full-size paper (for example A3) size.
Small size width control member 311 and breadth extreme control member 312 are made of ferrite core, and illustrated small size width control member 311 is that the right cylinder of circle constitutes by the cross section.In addition, illustrated breadth extreme control member 312 becomes fan-shaped ferrite core and constitutes by otch 312a being arranged on cross section on the axial position.
In addition, this flux regulator unit 310 is not limited to the structure of present embodiment, on the notch portion of breadth extreme control member 312, embed the electric conductor of aluminium or copper, become the structure that the magnetic flux that makes this part more effectively reduces, or there is not a ferrite core, appropriate combination and constitute aluminium or the assembly of copper coin etc., absorb or the structure of repelling magnetic flux also is fine on corresponding to the part of notch portion only.
In addition, small size width control member 311 and breadth extreme control member 312 are according to the position that paper standard, decision are provided with on the switching shaft 313 of passing through of recording chart 109.For example, when the passing through the paper standard and be central standard of recording chart 109, as Fig. 4 and shown in Figure 5, small size width control member 311 is configured in the center of switching shaft 313, and breadth extreme control member 312 is configured on two side positions of small size width control member 311.
In Figure 37, if solenoid 504 becomes connection (energising) state, the executive component of solenoid 504 just moves and arm 503 is shaken.Because shaking of this arm 503, gear wheel 502 rotations, drive pinion wheel are done driven rotation.Since the driven rotation of this pinion wheel 501, switching shaft 313 rotations, the about anti-turnback in the position of the otch 312a of breadth extreme control member 312.If solenoid 504 becomes disconnection (no power) state on this state, arm 503 just returns to initial position, gear wheel 502, pinion wheel 501 and switching shaft 313 reverse rotations respectively, the position of the otch 312a of breadth extreme control member 312 turns back to original position.
Like this, flux regulator unit 310 in the fixing device 300 that present embodiment 13 relates to, solenoid 504 according to on/off (ON/OFF) shift unit 500, make the position counter-rotating of the otch 312a of breadth extreme control member 312, the magnetic coupling force that passes through paper width direction of control photographic fixing band 210 and field coil 231.
That is, when the recording chart 109 that passes through is of a size of full-size, in Figure 37 solenoid 504 is placed on the state that disconnects, the field coil 231 that makes two sides of small size width control member 311 and breadth extreme control member 312 and excitation unit 230 in opposite directions.Thus, as Figure 35 and shown in Figure 36, produce, pass the magnetic flux of backing roll 220 with excitation unit 230, absorb by on paper width Lm region-wide in the maximum of backing roll 220 by small size width control member 311 and breadth extreme control member 312, the maximum that acts on photographic fixing band 210 is by paper overall width integral body, the heating of passing through paper width direction of photographic fixing band 210 is distributed in maximumly keeps even on the whole by the paper overall width.
On the other hand, when the recording chart 109 that passes through is of a size of small size, in Figure 37, solenoid 504 is placed on the state of connection, make 312 counter-rotatings of breadth extreme control member, so that make the position of its otch 312a with at field coil 231 in opposite directions, the small size width control member 311 that only makes corresponding undersized chart width and the field coil 231 of excitation unit 230 are in opposite directions.Thus, utilize excitation unit 230 to produce and pass the magnetic flux of backing roll 220, as shown in figure 36, only well absorbed on the zone of small size by paper width Ls of backing roll 220 by small size width control member 311, what only act on photographic fixing band 210 does not pass through paper width.Its result, descend with the not magnetic coupling by the field coil on the paper areas 231 at photographic fixing band 210, compare by the heating in paper width Ls zone with the small size of photographic fixing band 210, can suppress not by the heating of paper areas, just can prevent the excessive intensification of not passing through paper areas of photographic fixing band 210.
Like this, the fixing device 300 that present embodiment 13 relates to, because backing roll 220 passes magnetic flux, so, by size according to recording chart 109, make the position counter-rotating of the otch 312a of breadth extreme control member 312 selectively, partly increase and reduce the magnetic flux that passes backing roll 220, the heating of passing through paper width direction that just can easily control photographic fixing band 210 distributes.
(embodiment 14)
Below, the fixing device that relates to for embodiments of the present invention 14 describes.Figure 38 and Figure 39 are the summary sections of structure of the backing roll of the fixing device that relates to of expression embodiments of the present invention 14.
As shown in figure 38, the backing roll 620 of the fixing device that relates to as present embodiment 14, can use with metal thin-wall boards be rolled into cylindrical shape, solder joints part 621 constitutes.Because this fixing device can use weld pipe as its backing roll 620, so, can constitute on low price ground.
In addition, as shown in figure 39, the backing roll 720 of the fixing device that relates to as present embodiment 3 can use the roller that forms the enhancing groove 721 of rib shape along cylindrical generatrix direction.This fixing device can constitute backing roll 720 the high roller of bending strength that has used the little thin-walled material of thermal capacity.For example, even be less than or equal to the thin-walled material of 100 μ m,, just can constitute the backing roll that thermal capacity is little and bending strength is high by forming the enhancing groove 721 of rib shape.
But, as shown in figure 38, with the backing roll 620 of weld pipe formation, since different in the thermal capacity of its bonding part 621 and disengaged part, so it is irregular to produce temperature on its surface temperature.In addition, as shown in Figure 7, form the backing roll 720 of the enhancing groove 721 of rib shape, because different, so it is irregular also can to produce temperature on its surface temperature with respect to the heat conduction amount of making shadow bands 210 on the contact portion of photographic fixing band 210 and the noncontact part by oneself.
Therefore, in the fixing device that present embodiment 14 relates to, its constituted mode is that the girth of photographic fixing band 210 does not become integral multiple with the cylindrical length of backing roll 620 and backing roll 720.The fixing device of this structure, the swing circle of photographic fixing band 210 and backing roll 620 and backing roll 720 becomes different, and backing roll 620 when 210 rotations of photographic fixing band and backing roll 720 change one by one with the contact point of photographic fixing belt 210.Therefore, according to the fixing device of this structure, even it is irregular to produce temperature on backing roll 620,720, because the heat of this backing roll 620,720 is transmitted to certain position of photographic fixing band 210 and is not put aside, so, also just can make the even smoothing of surface temperature of photographic fixing band 210.
(embodiment 15)
Below, the fixing device that relates to for embodiments of the present invention 15 describes.Figure 40 is the summary section of structure of the backing roll of the fixing device that relates to of expression embodiments of the present invention 15.
As shown in figure 40, the backing roll 820 of the fixing device that present embodiment 15 relates to, the convex-concave 821 that forms knurling shape on cylindrical periphery constitutes.The contact area of can the Ji Li Minus few backing roll 820 of this fixing device and photographic fixing band 210.
Therefore, the fixing device that present embodiment 15 relates to can make the thermal insulation of photographic fixing band 210 and backing roll 820 improve, and makes the loss of heating energy of the photographic fixing band 210 when preheating tail off, and can shorten start-up time more.
; form the backing roll 820 of convex-concave 821 in this wise; if the spacing P of its convex-concave 821 is consistent with the swing circle of photographic fixing band 210; because the convex-concave 821 of the backing roll 820 when 210 rotations of photographic fixing band is certain point often with the contact point of photographic fixing band 210; so it is irregular to produce temperature on its surface temperature.
Therefore, in the fixing device that present embodiment 15 relates to, its constituted mode is that the spacing P of the girth of photographic fixing band 210 and convex-concave 821 does not become integral multiple.
The fixing device of Gou Chenging like this is not because the girth of photographic fixing band 210 is the integral multiple of the convex-concave 821 spacing P of backing roll 820, so the backing roll 820 during 210 rotations of photographic fixing band changes one by one with the contact point of photographic fixing band 210.Therefore, according to this fixing device, even it is irregular to produce temperature on the surface temperature of backing roll 820, the heat of this backing roll 820 is not put aside on certain point of photographic fixing band 210 yet, can make the even smoothing of surface temperature of photographic fixing band 210.
(embodiment 16)
Below, the fixing device that relates to for present embodiment 16 describes.Figure 41 is the summary section of structure of the backing roll of the fixing device that relates to of expression embodiments of the present invention 16.
As shown in figure 41, the backing roll 920 of the fixing device that present embodiment 16 relates to for example, will be combined into by many sheet materials 921 that the sheet metal of as shown in figure 42 flute profile is formed and cylindrically constitute.
The fixing device of Gou Chenging like this, because many sheet materials 921 that backing roll 920 is made up of the sheet metal of flute profile constitute, so, can be with the structure that backing roll 920 is little as thermal capacity and bending strength is high.In addition, according to this fixing device,, just can easily change the external diameter of backing roll 920 by changing the quantity of the sheet material 921 that constitutes backing roll 920.
(embodiment 17)
Below, the fixing device that relates to for embodiments of the present invention 17 describes.Figure 43 is the summary section of the fixing device structure that relates to of expression embodiments of the present invention 17.
As shown in figure 43, the fixing device 1100 that present embodiment 17 relates to, the band supporting member of its photographic fixing band 210 of suspension for example, is made ways in the arc-shaped 1120 by the sheet material that sheet metal is formed and is constituted.
This fixing device 1100, as the ways 1120 of its band supporting member occupy the space, compare with the situation that constitutes described band supporting member by backing roll because can be less, so, can do one's utmost to shorten the girth of photographic fixing band 210.In addition, this fixing device 1100, can with do also forr a short time than the thermal capacity of described backing roll as this ways 1120 with supporting member, price is also cheap.Have again, this ways 1120 such as, constitute even cut the part of the backing roll 920 that many sheet materials 921 be made up of the flute profile sheet metal of representing on Figure 42 constitute, also be fine.
In addition, the backing roll of expression goes for the heating arrangement except that the fixing device of video generation device from described embodiment 13 to embodiment 17.
This instructions is the 2004-155165 Jap.P. according to the 2003-358024 Jap.P. of application on October 17th, 2003, the 2003-358330 Jap.P. of application on October 17th, 2003, application on May 25th, 2004.The full content of these patents is incorporated this paper by reference into.
Industrial applicibility
The fixing device that the present invention relates to because do not need to make device to maximize, just can be eliminated Rotate to the magnetic flux that does not pass through paper areas by paper areas from generating component, prevent described By the excessive intensification of paper areas, so, as electrofax mode or electrostatic recording side The fixing device of the duplicator of formula, facsimile machine and printer etc. is useful.
Claims (34)
1. fixing device comprises:
The magnetic flux generation unit produces magnetic flux;
Heater element is made up of the nonmagnetic electric conductor of thin-walled, and it is passed and sensed heating by described magnetic flux;
At least one magnetism shielding element, the described magnetic flux of masked segment; And
The magnetic flux adjustment unit shields switching with releasing operation for the not magnetic flux by paper areas of described heater element,
Wherein, described magnetism shielding element, be configured in opposition side towards described magnetic flux generation unit one side with respect to the described heater element of thin-walled, and at described heater element adstante febre, for this heater element not by paper areas, make by described magnetic flux adjustment unit and to suppress this on its position that is in the described magnetic flux of shielding by the heating in the paper areas.
2. fixing device as claimed in claim 1 also comprises:
Unshakable in one's determination in opposite directions, be configured in opposition side towards described magnetic flux generation unit one side with respect to the described heater element of thin-walled,
Wherein, described magnetism shielding element, relatively move for the moving direction of described magnetic flux generation unit along described heater element, be displaced to the magnetic circuit rest position, to with not the ending of described magnetic flux generation unit and described described heater element between the iron core in opposite directions by the corresponding magnetic circuit of paper areas, and be displaced to the magnetic circuit off-position, described magnetic circuit is discharged.
3. fixing device as claimed in claim 1 wherein, is done described heater element circularizing, and is disposed described magnetism shielding element in the inboard of the formed ring of described heater element, disposes described magnetic flux generation unit in the outside of described ring.
4. fixing device as claimed in claim 1, wherein, described magnetic flux generation unit comprises:
Field coil, the coiling configuration; And
The center iron core is configured in the wire turn center of described field coil,
Wherein, described magnetism shielding element is with respect to the width of the direction that relatively moves of described magnetic flux generation unit, and is also wideer than the equidirectional width of described center iron core.
5. fixing device as claimed in claim 4, wherein, described magnetism shielding element is with respect to the width of the direction that relatively moves of described magnetic flux generation unit, and is also narrower than the equidirectional wire turn width at the wire turn position of described excitation line chart.
6. fixing device as claimed in claim 5, wherein, at least one magnetic circuit off-position of described magnetism shielding element is the position in opposite directions, wire turn position of described magnetism shielding element and described excitation line chart.
7. fixing device as claimed in claim 4, wherein, utilizing described magnetism shielding element is the position in opposite directions, wire turn center of described magnetism shielding element and described excitation line chart with the magnetic circuit rest position that the not magnetic circuit by paper areas of described heater element ends.
8. fixing device as claimed in claim 1, wherein, described magnetic flux generation unit comprises:
Field coil, the coiling configuration,
Wherein, described magnetism shielding element is with respect to the width of the direction that relatively moves of described magnetic flux generation unit, and is also wideer than the equidirectional width at described field coil wire turn center.
9. fixing device as claimed in claim 8, wherein, described magnetism shielding element is with respect to the width of the direction that relatively moves of described magnetic flux generation unit, and is also narrower than the equidirectional wire turn width at described excitation wire figure wire turn position.
10. fixing device as claimed in claim 9, wherein, at least one magnetic circuit off-position of described magnetism shielding element is the position in opposite directions, wire turn position of described magnetism shielding element and described field coil.
11. fixing device as claimed in claim 8, wherein, utilizing described magnetism shielding element is the position in opposite directions, wire turn center of described magnetism shielding element and described field coil with the magnetic circuit rest position that the not magnetic circuit by paper areas of described heater element ends.
12. fixing device as claimed in claim 1 wherein, comprising:
A plurality of described magnetism shielding elements have the different a plurality of not length by paper areas of the mutual width of corresponding described heater element respectively.
13. fixing device as claimed in claim 12, wherein, described a plurality of magnetism shielding element, be arranged on respect to described magnetic flux generation unit relatively on the rotation rotary body freely, and the angle θ that normal constituted at each center by 2 magnetism shielding elements adjoining each other is set to the unspecified angle θ that satisfies 30 °＜θ＜60 ° or 120 °＜θ＜180 °.
14. fixing device as claimed in claim 12, wherein, described a plurality of magnetism shielding elements have respectively with each of A3 dimension width, A4 dimension width and the B4 dimension width of described heater element by the corresponding length of paper areas.
15. fixing device as claimed in claim 1 also comprises:
Unshakable in one's determination in opposite directions, be configured to described magnetic flux generation unit in opposite directions,
Wherein, described magnetism shielding element is set at respect on the relative rotation of the described magnetic flux generation unit described iron core in opposite directions freely.
16. fixing device as claimed in claim 2, wherein, described magnetism shielding element is made of the otch that is arranged on the described iron core in opposite directions.
17. fixing device as claimed in claim 16 wherein, is embedded in electric conductor in the described otch.
18. fixing device as claimed in claim 17, wherein, described electric conductor and described surface unshakable in one's determination in opposite directions constitute same.
19. fixing device as claimed in claim 2, wherein, described magnetism shielding element is made of the recess that is arranged on the described iron core in opposite directions.
20. fixing device as claimed in claim 19 wherein, is embedded in electric conductor in the described recess.
21. fixing device as claimed in claim 20, wherein, described electric conductor and described surface unshakable in one's determination in opposite directions constitute same.
22. fixing device as claimed in claim 1 also comprises:
By paper areas magnetism shielding element, have with than the maximum of the described heater element width by paper areas also little pass through the corresponding length of paper areas width,
Wherein, be configured in and the passing through on the corresponding position of paper areas of described heater element by paper areas magnetism shielding element described.
23. fixing device as claimed in claim 1, wherein, described heater element is made of endless, and the band supporting member of the described endless of suspension is made of the member that passes magnetic flux.
24. fixing device as claimed in claim 23, wherein, described band supporting member, by the outside surface with respect to described endless, the thickness of vertical direction is that the metal material in 0.04mm～0.2mm scope constitutes.
25. fixing device as claimed in claim 23, wherein, described band supporting member fixed resistance is more than or equal to 50 μ Ω cm.
26. fixing device as claimed in claim 23, wherein, described band supporting member is made of nonmagnetic stainless steel material.
27. fixing device as claimed in claim 23, wherein, described band supporting member is formed by sheet material being rolled into cylindric, as to have welded bonding part rotation backing roll freely,
28. fixing device as claimed in claim 23, wherein, described band supporting member is made up of the rotation backing roll freely that forms rib shape enhancing groove according to cylindrical generatrix direction.
29. fixing device as claimed in claim 23, wherein, the girth of described endless is cylindrical length non-integral multiple of described backing roll.
30. fixing device as claimed in claim 23, wherein, described band supporting member is made up of the rotation backing roll freely that has formed the knurling convex-concave on cylindrical periphery.
31. fixing device as claimed in claim 30, wherein, described convex-concave is the spacing formation of circumferencial direction to stipulate along described backing roll, and the girth of described endless is the non-integral multiple of described convex-concave spacing.
32. fixing device as claimed in claim 23, wherein, described band supporting member is combined into columniform support stick by the sheet material with many flute profiles and forms.
33. fixing device as claimed in claim 23, wherein, described band supporting member is formed by sheet material being formed circular-arc ways.
34. a video generation device comprises: fixing device as claimed in claim 1.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP358024/2003 | 2003-10-17 | ||
| JP2003358024 | 2003-10-17 | ||
| JP358330/2003 | 2003-10-17 | ||
| JP155165/2004 | 2004-05-25 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1864108A CN1864108A (en) | 2006-11-15 |
| CN100447681C true CN100447681C (en) | 2008-12-31 |
Family
ID=37390852
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004800290051A Active CN100447681C (en) | 2003-10-17 | 2004-10-05 | Fixing apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100447681C (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5177348B2 (en) * | 2007-03-12 | 2013-04-03 | 株式会社リコー | Fixing device and image forming apparatus using the same |
| JP4557053B2 (en) * | 2008-06-19 | 2010-10-06 | コニカミノルタビジネステクノロジーズ株式会社 | Fixing apparatus and image forming apparatus |
| JP5175657B2 (en) * | 2008-08-25 | 2013-04-03 | 京セラドキュメントソリューションズ株式会社 | Image forming apparatus |
| JP5386218B2 (en) * | 2009-04-24 | 2014-01-15 | 京セラドキュメントソリューションズ株式会社 | Fixing apparatus and image forming apparatus equipped with the same |
| JP5581634B2 (en) * | 2009-09-15 | 2014-09-03 | 株式会社リコー | Fixing apparatus and image forming apparatus |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1074009A (en) * | 1996-08-30 | 1998-03-17 | Minolta Co Ltd | Fixing device |
| US5752148A (en) * | 1994-11-10 | 1998-05-12 | Minolta Co., Ltd. | Electromagnetic induction heating type fixing device and method |
| JP2001125407A (en) * | 1999-10-27 | 2001-05-11 | Matsushita Electric Ind Co Ltd | Image heating device and image forming device |
| JP2002148983A (en) * | 2000-11-10 | 2002-05-22 | Fuji Xerox Co Ltd | Fixing device |
| EP1253483A1 (en) * | 2000-09-29 | 2002-10-30 | Matsushita Electric Industrial Co., Ltd. | Image heating device and image forming device |
| JP2003077645A (en) * | 2001-09-05 | 2003-03-14 | Canon Inc | Heater and image forming device |
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2004
- 2004-10-05 CN CNB2004800290051A patent/CN100447681C/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5752148A (en) * | 1994-11-10 | 1998-05-12 | Minolta Co., Ltd. | Electromagnetic induction heating type fixing device and method |
| JPH1074009A (en) * | 1996-08-30 | 1998-03-17 | Minolta Co Ltd | Fixing device |
| JP2001125407A (en) * | 1999-10-27 | 2001-05-11 | Matsushita Electric Ind Co Ltd | Image heating device and image forming device |
| EP1253483A1 (en) * | 2000-09-29 | 2002-10-30 | Matsushita Electric Industrial Co., Ltd. | Image heating device and image forming device |
| JP2002148983A (en) * | 2000-11-10 | 2002-05-22 | Fuji Xerox Co Ltd | Fixing device |
| JP2003077645A (en) * | 2001-09-05 | 2003-03-14 | Canon Inc | Heater and image forming device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1864108A (en) | 2006-11-15 |
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