CN201145825Y

CN201145825Y - Carbon powder barrel for laser copier

Info

Publication number: CN201145825Y
Application number: CNU200820043385XU
Authority: CN
Inventors: 贺兆龙; 林龙
Original assignee: Print Rite Technology Development Co Ltd of Zhuhai
Current assignee: Print Rite Technology Development Co Ltd of Zhuhai
Priority date: 2008-01-22
Filing date: 2008-01-22
Publication date: 2008-11-05
Anticipated expiration: 2018-01-22

Abstract

The utility model relates to a carbon powder tube for a laser copier, which comprises a tube body and an end cover. The tube body consists of a first cone frustum, s second cone frustum, a third frustum, a fourth cone frustum, a first powder storing part and a second powder storing part. The first powder storing part, the back of which is towards one end of the third cone frustum, is butted with the upper bottom of the fourth cone frustum the lower bottom of which is butted with the second powder storing part and the outer wall of the second powder storing part is provided with a straight groove axially extending along the tube body. The carbon powder tube utilizes the inclined cone surfaces formed between all the cone frustums and the powder storing parts and is matched with the corresponding rotary movement of the tube body, so almost all the carbon powder held in the horizontal carbon powder tube can be transported to the powder outlet from the tail of the tube body. The carbon powder tube is characterized by high utilization efficiency of carbon powder and little residual powder.

Description

Laser copier carbon dust tube

Technical field

The utility model relates to and is used for the carbon dust tube that electrophotographic image forming holds carbon dust, especially for the carbon dust tube that holds carbon dust in the laser copier.

Background technology

The carbon dust tube is to be used for the electrophotographic image forming kind equipment tank of laser copier supply toner and so on developer for example.Usually, the carbon dust tube that is used for laser copier is installed in the developing apparatus of laser copier with dismountable form, by the meal outlet of carbon dust tube being docked on the powder inlet of laser copier developing apparatus, carbon dust in the carbon dust tube is fed in the developing chamber of developing apparatus, carbon dust is delivered to equably on the photosensitive drums that is arranged at developing apparatus by the developer roll that is arranged in developing chamber then, finish of the conversion of photosensitive drum surface electrostatic latent image, and final photographic fixing is on recording mediums such as paper to visual image.

Fig. 1 is a kind of known laser copier carbon dust elephant-legshaped vase oral area position cut-away illustration.This carbon dust tube A is made up of about cylindrical bottle 1, end cap 2 and elastic telescopic spare 3 with single direction Telescopic.Bottle 1 is that an axial end is closed, and a relative end is provided with the column shape container of an opening 101.End cap 2 is installed on the bottle opening 101 with screw thread butt joint form.The radially middle part of end cap 2 is provided with one and passes through bottle opening 101 with bottle 1 intracavity inter-connection, is used for providing to the developing chamber of laser copier developing apparatus the meal outlet 201 of carbon dust.Cruciform or in-line auxiliary stand 202 stride across on the end cap wall that meal outlet 201 is fixed in meal outlet 201 peripheries.Auxiliary stand 202 is along the one section column 203 that axially extends outwardly out of end cap 2, and expand into disk 204 at the extending end of column 203 along the direction perpendicular to end cap 2 axis.Elastic telescopic spare 3 be by several ring cavity walls at predetermined single direction, promptly end cap 2 axially on the extensible member that can extend in the direction or shrink that connects and composes one by one.It is surrounded on meal outlet 201, auxiliary stand 202 and column 203 in self inner chamber.Along end cap 2 axially, an end 301 of elastic telescopic spare 3 is fixed on the outer cylindrical wall 205 of end cap 2, the other end 302 forms the interference contact with the platform level shape circumferential edge 207 with disk 204 form keep with disk 204 or in conjunction with or the relation of separating.Like this, when 3 interference of elastic telescopic spare were incorporated on the circumferential edge of disk 204, meal outlet 201 was sealed jointly by elastic telescopic spare 3 and disk 204; When elastic telescopic spare 3 was compressed and disengages with the circumferential edge 207 of disk 204, meal outlet 201 was opened (referring to shown in Figure 2) with the path between the external environment condition 206, and the carbon dust of being stored in bottle 1 inner chamber can flow to the outside under action of gravity.

The both

ends

301 and 302 of elastic telescopic spare 3 by being meshed with the outer cylindrical wall 205 of end cap 2 and the platform level shape circumferential edge 207 of disk 204, are fixed on elastic telescopic spare 3 on the end cap 2 respectively.The carbon dust tube is before installation, and meal outlet 201 is in closed state; In the time of in being installed to laser copier, the opening device that is provided with at the developing chamber powder inlet place of laser copier developing apparatus promotes the stressed ring 303 of elastic telescopic spare 3, elastic telescopic spare 3 is thrown off from the platform level shape circumferential edge 207 of end cap 2 with the end 302 that the platform level shape circumferential edge 207 of disk 204 is meshed, and inner chamber place direction compression, thereby open meal outlet 201 along end cap 2 central axis direction towards bottle 1.

For guaranteeing to have the good compression function, the wall thickness of wind-box shape elastic telescopic spare 3 is less than 1mm usually.Because the thickness of elastic telescopic spare 3 is too small, the both ends 301 of elasticity extensible member 3 and 302 come off from the outer cylindrical wall 205 of the end cap 2 of correspondence and the platform level shape circumferential edge 207 of disk 204 easily in transportation, thereby cause the leakage powder.For overcoming this shortcoming, can increase the thickness of elastic telescopic spare 3 both

ends

301 and 302, but this can cause another problem again, because elastic telescopic spare 3 adopts the PE plastics to form through blowing usually, the degree of expansion of wayward PE plastics in the blow molding process, so that influence product size thickness, cause the product disqualification rate to increase, strengthen production cost.On the other hand, in order to increase the storage powder capacity of carbon dust tube, can strengthen the diameter of carbon dust tube afterbody usually.In this case, the bigger carbon dust tube afterbody of diameter usually can because and have bigger diameter difference between the carbon dust tube middle part and to form carbon dust residual, cause carbon dust to be unable to supply carbon dust tube port, make the residual a large amount of carbon dust of carbon dust tube afterbody.

The utility model content

The utility model purpose is to provide a kind of carbon dust tube that is used for to the laser copier supply toner, and this carbon dust tube is intended to improve the utilization ratio of storage carbon dust in it.

According to the laser copier carbon dust tube of above-mentioned purpose design, comprise hollow cylinder and removably be fixed in end cap on the aforementioned port with port and bottom.Cylindrical shell is divided into first frustum of a cone, second frustum of a cone, the 3rd frustum of a cone and the first storage powder portion successively from port to the bottom.The upper base of first frustum of a cone has identical diameter with port and with its butt joint.Going to the bottom of first frustum of a cone docked with going to the bottom of second frustum of a cone.The upper base of second frustum of a cone docks with the upper base of the 3rd frustum of a cone.Going to the bottom of the 3rd frustum of a cone with the butt joint of the first storage powder portion.The going to the bottom of the going to the bottom of first frustum of a cone, second frustum of a cone, going to the bottom of the 3rd frustum of a cone have identical diameter with the first storage powder portion.The first storage powder portion is back to the end upper base butt joint of the 4th frustum of a cone together of the 3rd frustum of a cone.Going to the bottom of the 4th frustum of a cone with the butt joint of the second storage powder portion.The outer wall of the second storage powder portion is provided with along the axially extended straight trough of cylindrical shell.

Preferably, aforementioned laser used in copy machines carbon dust tube is distributed with first thread segment, second thread segment and the 3rd thread segment that protrude out towards cylinder lumen on its cylinder inboard wall.First thread segment, second thread segment and the 3rd thread segment have the identical hand of spiral.First thread segment is in the make progress part of a part, first frustum of a cone and second frustum of a cone of cross-over connection port of drum shaft.Second thread segment is in drum shaft the make progress part, the 3rd frustum of a cone of cross-over connection second frustum of a cone and the part of the first storage powder portion.The 3rd thread segment is in the make progress part of a part, the 4th frustum of a cone and the second storage powder portion of cross-over connection first storage powder portion of drum shaft.

Preferably, aforementioned laser used in copy machines carbon dust tube, the quantity of its first thread segment, second thread segment and the 3rd thread segment is respectively two.Article two, first thread segment is symmetrical in the distribution of cylindrical shell axis.Article two, second thread segment is symmetrical in the distribution of cylindrical shell axis.Article two, the 3rd thread segment is symmetrical in the distribution of cylindrical shell axis.

More preferably, aforementioned laser used in copy machines carbon dust tube, its first thread segment, second thread segment and the 3rd thread segment keep the clockwise hand of spiral from the bottom to the direction of port.

Laser copier of the present utility model carbon dust tube, according to carbon dust tube different parts because the carbon dust residual phenomena that exists diameter difference to cause, there are differences the purpose that the form that adopts frustum between the position reaches the transition butt joint at two diameters, simultaneously, further thread segment is set in aforementioned transitional region.Like this, after a transition of frustum and the transition of screw thread secondary, just can be transported to the carbon dust that is positioned at the big zone of carbon dust tube tail diameter near the carbon dust tube port, realize reducing the residual purpose of carbon dust.

The drawing explanation

The existing laser copier of Fig. 1 carbon dust tube cut-open view.

The existing laser copier of Fig. 2 carbon dust tube duty cross-sectional schematic.

Fig. 3 a the utility model laser copier carbon dust tube skeleton view.

Fig. 3 b the utility model laser copier carbon dust tube cylindrical shell cut-open view

Fig. 4 the utility model laser copier carbon dust barrel structure decomposing schematic representation.

Fig. 5 the utility model laser copier carbon dust tube partial sectional view.

Fig. 6 the utility model laser copier carbon dust tube duty partial schematic sectional view.

Embodiment

Referring to Fig. 3 a, 3b, 4,5, show the utility model laser copier carbon dust tube and the structural relation under correlation behavior thereof.

The component parts of this carbon dust tube B comprises cylindrical shell 4 and end cap 5.

Cylindrical shell 4 inner hollow, it is that an axial end is closed bottom 403, a relative end is set to the about cylindrical long drum ladle of open port 401.End cap 5 can dock on the radially-outer surface of the open port 401 that form or bayonet socket butt joint form be installed in cylindrical shell 4 with screw thread, guaranteeing between cylindrical shell 4 and end cap 5, having detachability, for the developer of re-filling carbon dust and so on provides feasibility to recycle carbon dust tube B.In cylindrical shell 4 inner chambers,, be provided with and lead powder sheet 402 near the position of open port 401, so as cylindrical shell 4 be in following interior dress carbon dust of rotation status that its axis is parallel to surface level guide to open port 401 near.Usually, lead the holding pin (not shown) of powder sheet 402 by bolt and so on and be fixed on the end cap 5, its main part is buckled in the next inner chamber that is arranged in cylindrical shell 4 of state on the radially-outer surface of open port 401 at end cap 5.

Between open port 401 and bottom 403, direction along open port 401 to bottom 403, cylindrical shell 4 comprise the several sections that next coming in order are connected: first frustum of a cone 405, second frustum of a cone 406, the 3rd frustum of a cone 407, the first storage powder portion 408, the 4th frustum of a cone 409 and the second storage powder portion 410.

First frustum of a cone 405, the 3rd frustum of a cone 407, the first storage powder portion 408, the 4th frustum of a cone 409 and the second storage powder portion 410 all only have short axial length.Second frustum of a cone 406 has much larger than the axial length of first frustum of a cone 405, the 3rd frustum of a cone 407, the first storage powder portion 408, the 4th frustum of a cone 409 and the second storage powder portion 410.The first storage powder portion 408 and the second storage powder portion 410 have cylindric outward appearance respectively.The upper base of first frustum of a cone 405 has identical diameter with open port 401 and with its butt joint.Going to the bottom of first frustum of a cone 405 docked with second the going to the bottom of the frustum of a cone 406.The upper base of second frustum of a cone 406 docks with the upper base of the 3rd frustum of a cone 407.Going to the bottom of the 3rd frustum of a cone 407 with 408 butt joints of the first storage powder portion.The first storage powder portion 408 is back to the end upper base butt joint of the 4th frustum of a cone 409 together of the 3rd frustum of a cone 407.Going to the bottom of the 4th frustum of a cone 409 with 410 butt joints of the second storage powder portion.The second storage powder portion 410 docks with the cylindrical shell bottom 403 of shrinking gradually back to a side of the 4th frustum of a cone 409.The going to the bottom of the going to the bottom of first frustum of a cone 405, second frustum of a cone 406, going to the bottom of the 3rd frustum of a cone 407 have identical diameter with the first storage powder portion 408 4.Like this, the conical surface of first frustum of a cone 405, the 3rd frustum of a cone 407 and the 4th frustum of a cone 409 just has bigger degree of tilt, and the conical surface of second frustum of a cone 406 only has milder degree of tilt.On the outer cylindrical wall of the second storage powder portion 410, be provided with the straight trough 404 that extends along the axial α of cylindrical shell 4.When being installed to carbon dust tube B in the laser copier, straight trough 404 helps the location of carbon dust tube B in laser copier.Simultaneously, when carbon dust tube B was installed in the laser copier, the rotary torque that laser copier produces can pass to carbon dust tube B by straight trough 404, impelled its carbon dust tube B to form rotation.Straight trough 404 can jump to the 4th frustum of a cone 409 or the first storage powder portion 408.In the present embodiment, straight trough 404 is crossed the 4th frustum of a cone 409 and is jumped to the first storage powder portion, 408 The corresponding area.

On the internal chamber wall of cylindrical shell 4, be distributed with first thread segment 411, second thread segment 412 and the 3rd thread segment 413 that protrude out towards cylindrical shell 4 inner chambers.The quantity of first thread segment 411, second thread segment 412 and the 3rd thread segment 413 is respectively two.From cylindrical shell bottom 403 directions to open port 401, first thread segment 411, second thread segment 412 and the 3rd thread segment 413 all keep the clockwise hand of spiral.Article two, first thread segment 411 is symmetrical in the axis distribution of cylindrical shell 4.Article two, second thread segment 412 is symmetrical in the axis distribution of cylindrical shell 4.Article two, the 3rd thread segment 413 is symmetrical in the axis distribution of cylindrical shell 4.

First thread segment 411 on the axial α of cylindrical shell 4 cross-over connection following three zones: the part of the part of open port 401, whole first frustum of a cone 405 and second frustum of a cone 406.

Second thread segment 412 on the axial α of cylindrical shell 4 cross-over connection following three zones: the part of the part of second frustum of a cone 406, whole the 3rd frustum of a cone 407 and the first storage powder portion 408.

The 3rd thread segment 413 on the axial α of cylindrical shell 4 cross-over connection following three zones: the part of the part of the first storage powder portion 408, whole the 4th frustum of a cone 409 and the second storage powder portion 410.

Among Fig. 4,, extend the pipe shape column 501 that is communicated with cylindrical shell 4 inner chambers in the side of end cap 5 back to the inner chamber of cylindrical shell 4.Pipe column 501 outer walls are provided with projection 505.The extending end 502 of pipe column 501 is in closed state, and its stud wall that is parallel to pipe column bearing of trend α is provided with two meal outlets 503 that are symmetrical in pipe column 501 axis that are communicated with open port 401.On meal outlet 503, be coated with seal closure 8.Seal closure 8 is cylindrical sleeve, and its two ends along pipe column 501 bearing of trend α all are set to the opening of perforation mutually.Be parallel at seal closure 8 on the sidewall of the axial α of pipe support, be provided with the chute 801 that extends along the axial α of pipe column.Projection 505 on pipe column 501 outer walls is plugged in the chute 801 slidably.The axial cross-sectional shape of seal closure 8 is corresponding to the axial cross-sectional shape of pipe column 501, and its position is in the position at extending end 502 places of pipe column 501 usually.Between seal closure 8 and powder delivery 503, be lined with elastic porous material sheet 6.Material preparations such as elastic porous material sheet 6 general employing sponges, it is fixed on the inwall of seal closure 8 with bonding form, help when seal closure 8 is covered in the powder delivery 503, to form tight sealing, prevent that the carbon dust in cylindrical shell 4 inner chambers from leaking into external environment condition meal outlet 503.

At the extending end 502 of pipe column 501, be provided with the bulge loop 7 of radial dimension greater than pipe column 501 radial dimensions.Bulge loop 7 adopts the form of individual member, shows as an independently annulus, is the flexible rubber ring that utilizes elastic rubber material or silica gel material preparation, and it is placed on the annular groove that the position, extending end 502 place of pipe column 501 circumferential edge is provided with.Accordingly, seal closure 8 especially near the inwall of its axial end with keeping the interference contact condition between the bulge loop 7, so that between the inwall of seal closure 8 and bulge loop 7, form sealing.

On the outer wall of seal closure 8, be equipped with a coil spring 9.An axial end of coil spring 9 is fixed in the clamping form on the cylindrical wall of end cap 5, and the opposite end is maintained fixed contact with the expansion loop 802 that is provided with on the outer wall of form with seal closure 8.Expansion loop 802 is positioned at an axial end of seal closure 8, and this end towards the outside of cylindrical shell 4, is in identical substantially axial location with the extending end 502 of pipe support 501 under carbon dust tube B assembled state.

Shown in Fig. 3,5, under carbon dust tube B assembled state, seal closure 8 is being covered on the meal outlet 503 of pipe column 501 under the elastic force effect of coil spring 9 regularly, and meal outlet 503 is closed.Simultaneously, because the bulge loop 7 of pipe column 501 is sealed in the meal outlet 503 of pipe column 501 carbon dust with the sealing contact that keeps the interference form between seal closure 8 inwalls fully.

Referring to Fig. 6, under carbon dust tube B packs the state of laser copier into, the opening device that is provided with at the developing chamber powder inlet place of laser copier developing apparatus promotes the expansion loop 802 of seal closure 8, make the axial α compression coil spring 9 of seal closure 8 along pipe column 501, and then make seal closure 8 towards end cap 5 place direction motions, make the meal outlet 503 of pipe column 501 be exposed out gradually, powder delivery 503 is set up with the path between the external environment condition 504, under the state that carbon dust tube B rotates owing to the driving of laser copier, the carbon dust of being stored in cylindrical shell 4 inner chambers is subjected to the prograding that above-mentioned each frustum of a cone on the cylindrical shell 4 and thread segment apply and flows to the outside.Under carbon dust tube B did not pack the state of laser copier into, the expansion loop 802 of seal closure 8 only was subjected to coil spring 9 restorable elastic force, and moved to the position that the meal outlet 503 with pipe column 501 keeps in touch, and made meal outlet 503 be closed (see figure 5).

Claims

1. laser copier carbon dust tube, comprise hollow cylinder and removably be fixed in end cap on the described port with port and bottom, described cylindrical shell is divided into first frustum of a cone successively from described port to described bottom, second frustum of a cone, the 3rd frustum of a cone and the first storage powder portion, the upper base of described first frustum of a cone has identical diameter with described port and docks with described port, going to the bottom of described first frustum of a cone docked with going to the bottom of described second frustum of a cone, the upper base of described second frustum of a cone docks with the upper base of described the 3rd frustum of a cone, going to the bottom of described the 3rd frustum of a cone with the butt joint of the described first storage powder portion, going to the bottom of described first frustum of a cone, going to the bottom of described second frustum of a cone, going to the bottom of described the 3rd frustum of a cone has identical diameter with the described first storage powder portion, it is characterized in that of an end together upper base butt joint of four frustum of a cone of the described first storage powder portion back to described the 3rd frustum of a cone, going to the bottom with the butt joint of the second storage powder portion of described the 4th frustum of a cone, the outer wall of the described second storage powder portion is provided with along the axially extended straight trough of described cylindrical shell.

2. laser copier carbon dust tube according to claim 1, it is characterized in that being distributed with on the described cylinder inboard wall first thread segment that protrudes out towards described cylinder lumen, second thread segment and the 3rd thread segment, described first thread segment, described second thread segment has the identical hand of spiral with described the 3rd thread segment, described first thread segment is in the make progress part of the described port of cross-over connection of described drum shaft, the part of described first frustum of a cone and described second frustum of a cone, described second thread segment is in the make progress part of described second frustum of a cone of cross-over connection of described drum shaft, the part of described the 3rd frustum of a cone and the described first storage powder portion, described the 3rd thread segment is in the make progress part of the described first storage powder portion of cross-over connection of described drum shaft, the part of described the 4th frustum of a cone and the described second storage powder portion.

3. laser copier carbon dust tube according to claim 2 is characterized in that the direction to described port keeps the clockwise hand of spiral from described bottom for described first thread segment, described second thread segment and described the 3rd thread segment.

4. laser copier carbon dust tube according to claim 3, the quantity that it is characterized in that described first thread segment, described second thread segment and described the 3rd thread segment is respectively two, article two, described first thread segment is symmetrical in described cylindrical shell axis and distributes, article two, described second thread segment is symmetrical in described cylindrical shell axis and distributes, and two described the 3rd thread segments are symmetrical in described cylindrical shell axis and distribute.