CN201156166Y - Developer reservoir for laser printer - Google Patents

Abstract

The utility model relates to a developer container used by a laser printer, which comprises an internal cylinder and an external cylinder. A stirring rack which can rotate around a shaft in the internal cylinder is arranged in the inner cavity of the internal cylinder. The first end of the stirring rack along the axial direction of the internal cylinder is provided with a first support. The first support is fixed on the central shaft of the stirring rack. Included angles are respectively formed between both ends of the first support along the radial direction of the internal cylinder and the axial cross section of the internal cylinder. The two edges of the first support, between which an included angle is formed, simultaneously point downwards along the rotating direction of the first support. One of the two edges of the first support is parallel to the axial cross section of the internal cylinder. The two edges are inclined to the axial middle part of the internal cylinder. The developer container has a high powdered carbon utilization rate, and the residual powdered carbon in the inner cavity is little.

Description

The laser printer developer reservoir

Technical field

The utility model relates to the laser printer developer reservoir, particularly disposing developer in it stirs and delivery mechanism, be used for splendid attire scheduled volume developer, and laying in developer in it is delivered to developer roll by the supply opening that is provided with on its wall developer reservoir.

Background technology

Electrophotographic image forming, laser printer for example, its use value shows as by containing the laser beam that predetermined information is arranged has predetermined potential with the scan mode irradiation photosensitive drums, form electrostatic latent image at photosensitive drum surface, and then the developer of this electrostatic latent image with predetermined carbon dust and so on developed, be transferred to the carbon dust image that is about to obtain on the recording medium such as paper through developing, afterwards again the image fixing of transfer printing acquisition, become the visual image that naked eyes can be observed, realize the conversion of image---signal---between the image.

Common laser printer is provided with in its casing or includes charging roller, photosensitive drums, laser scanning mechanism, developer roll, transfer roll and fixing roller etc.These component parts finally can form the different unit of integrated level according to manufacturer's purpose of design and technical thought separately.For example, consider factors such as task that each unit is born and technical life, charging roller, photosensitive drums etc. is prepared into an independently image forming process unit, also can claim photosensitive unit; Laser scanning mechanism, transfer roll and fixing roller then directly are installed in the laser printer respectively; Developer roll and powder feeding roller etc. are integrated into an independently developing apparatus, also claim developing cell or Delevoping cartridge.After photosensitive unit and developing cell are combined into a powder box that possesses image transitions ability and image developing ability simultaneously, standby in the printer of just can packing into.Perhaps, in view of holding the disposable operating characteristic of storing up carbon dust in the developing cell, and the developing apparatus concentrated area that comprises developer roll, powder feeding roller, powder-storage bin and waste powder hopper etc. is designed to a relatively independent replaceable member, make it with comprising the image forming process unit of charging roller, photosensitive drums or comprising that the laser printer of image forming process unit keeps dismountable movable connection method.Perhaps, further powder-storage bin and waste powder hopper are combined and be designed to individual member, certainly, also can be that powder-storage bin and waste powder hopper are designed to individual member respectively, make them keep dismountable movable connection method with the developing cell that comprises developer roll, powder feeding roller, for in time changing carbon dust, the durability that makes full use of parts such as developer roll, photosensitive drums facilitates.

In the course of the work, photosensitive drums charges to predetermined potential by charging roller, and response is formed corresponding to the electrostatic latent image for the treatment of print image on its cylindrical surface by the irradiation of laser scanning mechanism emitted laser bundle.

Store developer for example toner, ink powder or carbon dust within it in the container that the carbon dust tube is established, and utilize powder feeding roller and developer roll that carbon dust is sent to the corresponding region that photosensitive drums has electrostatic latent image, obtain the visual carbon dust image that naked eyes can be observed.

The carbon dust image that forms on the photosensitive drums is transferred on the paper of walking between the slit of photosensitive drums and transfer roll by transfer roll, utilizes fixing roller that the carbon dust image on the paper is given permanent photographic fixing at last.

For the split type developer reservoir that obtains because of the integrated level difference, it mainly utilizes the powder-storage bin of establishing in it to bear the storage task of carbon dust, and by puddle support carbon dust is transported to developer roll.This split type developer reservoir has the cylindrical shape outward appearance.Its powder-storage bin offers powder supply port in the middle part of axially.It and the developing cell that comprises developer roll, powder feeding roller, and between the photosensitive unit at photosensitive drums place, generally take the separately mode of accumulating, then fit assembling during installation.The puddle support that is arranged in powder-storage bin is made of the powder feeding blade of back shaft and elastic material.The mode that back shaft is bonding with usually adopting between the elasticity powder feeding blade, welding or machinery cooperate is finished between the two fixing.Because powder supply port is set at the axial medium position of powder-storage bin, therefore, elasticity powder feeding blade has the form of curved surface, makes elasticity powder feeding blade can guide carbon dust to converge to the medium position of powder-storage bin corresponding to the powder supply port place by the axial two ends of powder-storage bin in rotary course.Yet, because the elastic characteristic of elasticity powder feeding blade itself keeps certain interval between the axial end wall of common meeting of its axial end portion and powder-storage bin, so that its axial end portion can be because of forming friction with the powder-storage bin axial end wall and being out of shape.Under this design point, certainly will cause a considerable amount of carbon dusts to residue in the powder-storage bin because of the existence of aforementioned gap, cause the carbon dust utilization ratio low.

The utility model content

The utility model purpose is to provide a kind of laser printer developer reservoir.This developer reservoir has under the state in gap between maintenance elasticity powder feeding blade is with the powder-storage bin axial end wall, still can be transported to the powder-storage bin powder supply port to the carbon dust that is positioned at this gap.

Laser printer developer reservoir according to the above-mentioned purpose design comprises the inner core and the urceolus that are rendered as cylindrical and hollow simultaneously.The axial both ends open of urceolus.The end sealing that inner core is axial, and its opposite end is sealed by detachable end.Urceolus is wrapped on the inner tank theca.Can in the certain angle scope, rotate around the inner core axis between inner core and the urceolus.The barrel in the axial stage casing of inner core is provided with and is communicated with its inner chamber and outside powder supply port.The urceolus position is provided with connected entrance corresponding to the barrel of powder supply port.In the inner chamber of inner core, be provided with the puddle support that can be supported on the axial two ends of inner core respectively around its axis two ends that the inner core axis rotates.Puddle support is provided with first support along the first axial end of inner core.First support is fixed on the puddle support axis.First support along inner core two ends radially separately and all have angle between the inner core axial cross section.First support forms two limits of angle and points to the downstream by the upstream of the first support sense of rotation simultaneously.Aforementioned two angles generally all can adopt identical numerical value.

Usually, aforementioned laser printer developer reservoir, first support form one of two limits of angle and are parallel to the inner core axial cross section, and two the vergence direction on these two limits trends towards the axial middle part of inner core.

Preferably, aforementioned laser printer developer reservoir, its first support keep sliding contact with the cylinder shape inner wall of inner core respectively along inner core two ends radially.Along inner core axially, first support is with keeping sliding contact between the axially nearest end wall of inner core.

More preferably, aforementioned laser printer developer reservoir, its puddle support is provided with make second support identical with first support along the second axial end of inner core.Here, make is identical to be meant, second support forms two limits of angle and points to the downstream by the upstream of the second support sense of rotation simultaneously, and its along inner core two ends radially respectively the cylinder shape inner wall with inner core keep sliding contact.Along inner core axially, second support is with keeping sliding contact between the axially nearest end wall of inner core.

Laser printer developer reservoir of the present utility model is provided with the puddle support that has support on the puddle support axis.The radial extremity of support be configured to and the inner core axial cross section between have the form of angle.The downstream is pointed to by the upstream of support sense of rotation simultaneously in two limits that form angle, and one of two limits of this angle are parallel to the inner core axial cross section, and two the vergence direction on these two limits trends towards the axial middle part of inner core.Under this structural regime, when puddle support drives the support rotation under the rotary torque effect that laser printer transmits, aforementioned angle can form sagittate powder feeding front end on the support sense of rotation, near the carbon dust that is positioned at the inner core axial end wall is produced be pushed to the axially trend at middle part of inner core, and then be sent to the inner core powder supply port by the elasticity powder feeding blade of puddle support or setting it on again.

The drawing explanation

Fig. 1 a the utility model laser printer developer reservoir skeleton view one, the powder supply port that developer reservoir is shown is in closing state.

Fig. 1 b the utility model laser printer developer reservoir skeleton view two, the powder supply port that developer reservoir is shown is in the state of unlatching.

The STRUCTURE DECOMPOSITION skeleton view of Fig. 2 the utility model laser printer developer reservoir.

The puddle support skeleton view one of Fig. 3 a the utility model laser printer developer reservoir.

The puddle support skeleton view two of Fig. 3 b the utility model laser printer developer reservoir.

The puddle support support action principle figure of Fig. 4 the utility model laser printer developer reservoir.

Embodiment

Describe the tectonic relationship of the utility model laser printer developer reservoir and respective members thereof in detail below in conjunction with accompanying drawing.Consult Fig. 1～4, show the structural representation of the utility model laser printer developer reservoir A and respective members.Wherein, inner core 1 shown in Fig. 1 a and the urceolus 2 predetermined angle that staggers mutually only exposes connected entrance 204 on the developer reservoir A outer wall; Inner core 1 shown in Fig. 1 b and urceolus 2 be the rotation predetermined angular mutually, demonstrates the powder supply port 101 and the connected entrance 204 of mutual alignment and connection.

This laser printer developer reservoir A is made of inner core 1 and the urceolus 2 that it all is rendered as cylindrical and inner hollow.In the cylindrical cavity of inner core 1, be provided with puddle support 3.The axial two ends of puddle support 3 are supported on the axial end walls of inner core 1 (one of end walls that inner core 1 is axial adopts movable end cover 103 described below to replace) respectively, and it can rotate around the axis α of inner core 1.

Urceolus 2 is cylindrical tube that its axial two ends are in opening-wide state.On its cylindrical tube outer wall, be provided with two registration arm 201,202 of extending along urceolus 2 radial outward.Utilize two registration arm 201,202 can make urceolus 2 easily, and be used for the interior storehouse formation location cooperation of receiving photographic developer container A with the laser printer (not shown) around self axis formation rotation.On the cylindrical tube outer wall of urceolus 2, also be provided with some the grooves 203 that extend along urceolus 2 axial (overlapping) in addition with the axial α of inner core 1 described below.The formation location, interior storehouse that these grooves 203 also are used to assist urceolus 2 and laser printer to be used for the receiving photographic developer container A cooperates.On the barrel in urceolus 2 axial stage casings, be provided with the connected entrance 204 that is communicated with its cylindrical tube inner chamber and outside.Connected entrance 204 is axially corresponding with the powder supply port 101 that is arranged on inner core 1 barrel described below in the position on the urceolus 2 along urceolus 2.On axial two end walls of urceolus 2, be respectively arranged with several projections 206 or the groove 205 that are symmetrical in urceolus 2 axially middle cross sections.Projection 206 and groove 205 axially extend respectively and shrink along urceolus 2, they cooperate with locating piece 105 described below, help between inner core 1 and urceolus 2, both can be rotary shifted mutually in the certain angle scope and the state that is fixed at predetermined phase angle around inner core 1 axis α to form inner core 1 and urceolus 2.

Inner core 1 is along end wall 102 sealings by the one injection moulding that is same as its barrel material of the end of self axial α, and its opposite end is then by detachable end 103 sealings.End cap 103 can adopt the mechanical inserted form with the form that engages between the inner core 1, and also can adopt the threaded engagement form, perhaps other suitable form.In order to cooperate the location of developer reservoir A in laser printer, the sidewall of end wall 102 along inner core 1 axial α back to inner core 1 is provided with several positioning tables 104; On the other hand, between inner core 1 and urceolus 2, can be in the certain angle scope rotary shifted mutually and in order to keep both to form at the state that predetermined phase angle is fixed around inner core 1 axis α, be provided with several locating pieces 105 at end wall 102 along inner core 1 periphery radially.Locating piece 105 is in the convex inner core 1 outer cylindrical wall outside that reaches, inner core 1 footpath.Be plugged at inner core 1 under the state of urceolus 2 inside, locating piece 105 slides in aforementioned grooves 205, and in being resisted against projection 206 one when going up, inner core 1 is by relative fixed.Same, end cap 103 along inner core 1 axial α on the sidewall of inner core 1, and at end cap 103 along inner core 1 periphery radially, also be provided with positioning table 104 and locating piece 105 keep respectively the symmetry several positioning table (not shown)s and locating piece 106.On the barrel in inner core 1 axial stage casing, be provided with the powder supply port 101 that is communicated with its inner chamber and outside.

Under the installment state of developer reservoir A, urceolus 2 is wrapped on inner core 1 cylindrical outer wall rotationally.At this state, urceolus connected entrance 204 keeps aliging on inner core 1 axial α with inner core powder supply port 101.When keeping inner core 1 static when rotation urceolus 2, between inner core 1 and urceolus 2, will form state in relative rotation.This rotation is subjected to the restriction of aforementioned locating piece 105,106 and groove 205 and projection 206, cause urceolus connected entrance 204 on inner core 1 circumferencial direction β, to form the state that aligns or stagger, reach the purpose of opening powder supply port 101 or sealing powder supply port 101 with inner core powder supply port 101.Adopt bonding form to attach the diaphragm seal 107 of sponge and so at inner core powder supply port 101 peripheries, will help anti-leak-stopping powder.

Referring to Fig. 3 a, 3b, aforementioned puddle support 3 is along the first axial end 301 of inner core 1, promptly under the installment state of developer reservoir A near an end of end cap 103, be provided with first support 302.Puddle support 3 passes end cap 103 along the inner core 1 first axial end 301 and also supports thereon under developer reservoir A installment state.First support 302 is fixed on the axis 304 of puddle support 3.Puddle support 3 is along the second axial end 303 of inner core 1, promptly at the assembled state lower back of developer reservoir A a end to end cap 103, after passing end wall 102 under the developer reservoir A assembled state, removably fixing with the gear 4 that is used to accept the rotary torque that laser printer transmits.Usually, puddle support 3, will consider between second end 303 and end wall 102 lining and establishes the gasket seal (not shown) when passing end wall 102 along axial second end 303 of inner core 1, in case the blocking powder from both contact gap internal leakage to developer reservoir A outside.First support 302 keeps sliding contact (can certainly at first support 302 along the gap that retains between the cylinder shape inner wall of inner core 1 diametric two ends and inner core 1 slightly) respectively between the cylinder shape inner wall with inner core 1 along inner core 1 diametric two ends.Axial α along inner core 1, first support 302 is with keeping sliding contact (certainly between nearest end wall 103 inwalls of inner core 1 axial α, along the axial α of inner core 1, also can retain gap slightly between first support 302 and nearest end wall 103 inwalls).Keep sliding contact along inner core 1 diametric two ends between respectively with the cylinder shape inner wall of inner core 1 or retain under the design point in gap slightly at first support 302, when end cap 103 breaks away from inner core 1, first support 302 can provide positioning supports for puddle support 3, make the puddle support 3 unlikely axis α that too depart from inner core 1 because losing the support of end cap 103, cause its opposite end 303 because be located on and occur friction, collision between the supported hole 108 on the end wall 102 and impaired.

On the axis 304 of aforementioned puddle support 3, be fixed with elasticity powder feeding blade 305.The mode that elasticity powder feeding blade 305 adopts usually is bonding, welding or machinery cooperate is fixed on the base 306 that is provided with on the axis 304.Consider that inner core powder supply port 101 is set at the axial medium position of inner core 1, elasticity powder feeding blade 305 is designed to the form of curved surface, to realize that elasticity powder feeding blade 305 can guide carbon dust to converge to the medium position of inner core 1 corresponding to powder supply port 101 places by the axial two ends of inner core 1 inner chamber, can concentrate near the powder supply port 101 carbon dust relatively in rotary course.

Referring to Fig. 4, show on inner core 1 axial cross section 109, when the diametric(al) end of first support 302 during perpendicular to the axial cross section 109 of inner core 1, first support 302 is along the schematic structure of one of inner core 1 diametric two ends.According to this structure, first support 302 all has the angle γ of identical numerical value separately with between the axial cross section 109 of inner core 1 along inner core 1 diametric two ends.Fig. 4 is that example is illustrated with first support 302 shown in Fig. 3 a along inner core 1 diametric one of them end 307, first support 302 forms two limits of angle γ and points to the downstream by the upstream of first support, 302 sense of rotation φ simultaneously, that is first support 302 forms two limits of angle γ in the upstream of first support, 302 sense of rotation φ crossing (first support, 302 sense of rotation φ and inner core 1 circumferencial direction β keeping parallelism).Among Fig. 4, first support 302 is along two sidewalls of inner core 1 diametric terminal 307 on inner core 1 axial α among two limits difference representative graph 3a of first support, 302 formation angle γ.First support 302 forms one of two limits of angle γ and is parallel to inner core 1 axial cross section 109, and two the vergence direction on its two limits trends towards inner core 1 middle part of α vertically.That is to say, first support 302 along inner core 1 diametric terminal 307 along two sidewalls on the inner core 1 axial α, the parallel sidewalls of wherein pressing close to end cap 103 is in inner core 1 axial cross section 109, trends towards inner core 1 middle part of α (consulting Fig. 2) vertically back to the vergence direction of the sidewall of end cap 103.When puddle support 3 drives first support 302 when sense of rotation φ shown in Fig. 3 a, 4 rotates, terminal 307 just form sagittate powder feeding front end on a sense of rotation φ, near the carbon dusts that are positioned at the end cap 103 are produced be pushed to inner core 1 trend at the middle part of α vertically, and then be sent to inner core powder supply port 101 by elasticity powder feeding blade 305 again.

On above-mentioned structure foundation, can also be at second end 303 of puddle support 3 along inner core 1 axial α, promptly near an end of end wall 102, make and first support, the 302 identical second support (not shown)s are set, with this another embodiment as the utility model laser printer developer reservoir A.Here, because the make of second support is identical with first support 302, is installed to after only need reversing on the axis 304 of puddle support 3 and gets final product, so no longer given unnecessary details it.

Claims (4)

1. laser printer developer reservoir, comprise the inner core and the urceolus that are rendered as cylindrical and hollow simultaneously, the axial both ends open of described urceolus, the axial end of described inner core sealing and the opposite end is sealed by detachable end, described urceolus is wrapped on the described inner tank theca, can in the certain angle scope, rotate around described inner core axis between described inner core and the described urceolus, the barrel in the axial stage casing of described inner core is provided with and is communicated with its inner chamber and outside powder supply port, described urceolus position is provided with connected entrance corresponding to the barrel of described powder supply port, be provided with the puddle support that can be supported on the axial two ends of described inner core respectively in the inner chamber of described inner core around its axis two ends that described inner core axis rotates, described puddle support is provided with first support along the first axial end of described inner core, described first support is fixed on the described puddle support axis, it is characterized in that described first support all has angle separately and between the described inner core axial cross section along described inner core two ends radially, described first support forms two limits of described angle and points to the downstream by the upstream of the described first support sense of rotation simultaneously.

2. according to the described laser printer developer reservoir of claim 1, it is characterized in that one of two limits that described first support forms described angle are parallel to described inner core axial cross section, two the vergence direction that described first support forms two limits of described angle trends towards the axial middle part of described inner core.

3. according to the described laser printer developer reservoir of claim 2, it is characterized in that described first support keeps sliding contact with the cylinder shape inner wall of described inner core respectively along described inner core two ends radially, along described inner core axially described first support with keeping sliding contact between the axially nearest end wall of described inner core.

4. according to the described laser printer developer reservoir of claim 3, it is characterized in that described puddle support is provided with make second support identical with described first support along the second axial end of described inner core.

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