Classifications

• • G—PHYSICS
  • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
  • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
  • G03G21/00—Arrangements not provided for by groups G03G13/00 - G03G19/00, e.g. cleaning, elimination of residual charge
  • G03G21/10—Collecting or recycling waste developer
  • G03G21/12—Toner waste containers
• • G—PHYSICS
  • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
  • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
  • G03G15/00—Apparatus for electrographic processes using a charge pattern
  • G03G15/06—Apparatus for electrographic processes using a charge pattern for developing
  • G03G15/08—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer
  • G03G15/0822—Arrangements for preparing, mixing, supplying or dispensing developer
  • G03G15/0848—Arrangements for testing or measuring developer properties or quality, e.g. charge, size, flowability
  • G03G15/0849—Detection or control means for the developer concentration
  • G03G15/0855—Detection or control means for the developer concentration the concentration being measured by optical means
• • G—PHYSICS
  • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
  • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
  • G03G15/00—Apparatus for electrographic processes using a charge pattern
  • G03G15/06—Apparatus for electrographic processes using a charge pattern for developing
  • G03G15/08—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer
  • G03G15/0822—Arrangements for preparing, mixing, supplying or dispensing developer
  • G03G15/0865—Arrangements for supplying new developer
• • G—PHYSICS
  • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
  • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
  • G03G15/00—Apparatus for electrographic processes using a charge pattern
  • G03G15/06—Apparatus for electrographic processes using a charge pattern for developing
  • G03G15/08—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer
  • G03G15/0822—Arrangements for preparing, mixing, supplying or dispensing developer
  • G03G15/0865—Arrangements for supplying new developer
  • G03G15/0867—Arrangements for supplying new developer cylindrical developer cartridges, e.g. toner bottles for the developer replenishing opening
  • G03G15/0868—Toner cartridges fulfilling a continuous function within the electrographic apparatus during the use of the supplied developer material, e.g. toner discharge on demand, storing residual toner, acting as an active closure for the developer replenishing opening

Definitions

• the present invention relates to a toner cartridge for a laser printer.
• a laser printer to which the toner cartridge is applied has a rotary developing device.
• the rotary developing device drives a plurality of mutually independent developing units to sequentially enter the developing region in a rotational manner.
• the toner cartridge of the present invention can be installed in a developing unit to supply toner for development, and recover the residual toner after development.
• the present invention is based on the application date of September 20, 2006, and the application numbers are 200620064821. 2, 200620064822. 7, 200620064823. 1 three Chinese utility new patent applications, the contents of which are incorporated herein by reference. Background Art Existing image forming apparatuses such as laser printers have a wide variety of construction forms.
• One of them uses a rotary developing device as an image developing mechanism.
• a plurality of developing units respectively loaded with toner of different colors are disposed along the circumferential direction of the developing device.
• the developing units are rotated by the driving of the rotating member to sequentially move to a developing region opposite to the photosensitive drum, for example, four developing units respectively loaded with yellow, magenta, cyan, and black toners are sequentially moved to the developing region, and A toner image of four colors is sequentially formed on the photosensitive drum.
• the toner images of these four colors are superposed on each other on a recording medium or an intermediate transfer body such as paper to finally form a color image.
• a toner cartridge is detachably disposed in each of the developing units, and is responsible for the task of feeding the toner into the developing unit and collecting residual toner or residual powder from the developing unit.
• a recovery port for recovering toner in the developing unit is disposed at an end face of the toner cartridge.
• a typical structure is disclosed in the N200510051295. 6 invention patent application specification, a pivot or pivot hole is provided on the inner wall of the sealed end cap for sealing the toner cartridge port.
• the inner wall of the sealed end cap is provided with a toner inflow through hole corresponding to the toner recovery port of the toner cartridge.
• One end of the plate gate is fixed to the inner wall of the sealing end cap by a pivot or a pivot hole.
• the inner wall of the sealed end cap is inserted into the residual powder recovery chamber of the toner cartridge, and the carbon powder flowing into the through hole communicates with the toner recovery port of the toner cartridge.
• the plate-like shutter is rotatable about a pivot or a pivot hole in a space defined by the wall of the toner recovery chamber of the toner cartridge. With the rotary motion of the developing unit, the plate gate is pivoted or pivoted as a fulcrum, and the toner inflow through the inner wall of the sealing end cap can be opened or closed by its own weight, thereby controlling the toner recovery port of the toner cartridge. .
• An object of the present invention is to provide a toner cartridge for a laser printer which can prevent the toner in the collection chamber from flowing back to the developing device and has a simple anti-reflux structure.
• a toner cartridge for a laser printer designed according to the above object includes a toner storage chamber and a toner recovery chamber which are axially separated from each other, and the toner storage chamber and the toner recovery chamber are respectively located on both axial sides of the toner cartridge
• the opening of the toner recovery chamber at the axial end of the toner cartridge is detachably sealed by the end cover, and the end cover has a state in which the end cover extends into the toner recovery chamber along the axial direction of the toner cartridge and is
• the carbon recovery chamber has a cylindrical surface closely attached to the plate, and the toner recovery chamber has a passage for the toner to flow in the cylinder near the opening, and the plate has a through hole corresponding to the passage portion, wherein the end cover is installed a valve seat extending into the toner
• the projection of the through hole in a plane perpendicular to the inflow direction of the carbon powder is circular, and the spool is reciprocally rolled along the inflow direction of the carbon powder in the through hole of the sheet and has a diameter larger than the through hole.
• the ball has a gap width between the valve seat and the plate that is smaller than the diameter of the ball.
• the valve seat is provided with a cylindrical cavity in which the line coincides with the center line of the through hole and has a diameter slightly larger than the ball in the inflow direction of the through hole, and the cylindrical cavity is open toward the end of the through hole, and the ball is located in the cylindrical cavity.
• the above-mentioned toner cartridge for a laser printer has a spherical gravity valve core disposed on the end cover thereof, and the spherical valve core cooperates with the rotary motion of the developing unit to form a spherical valve core to rely on gravity to draw toner in the toner recovery through hole.
• the valve body is a valve plate reciprocally slidable along the inflow direction of the carbon powder in the through hole, the base of the valve plate facing the through hole is supported on the valve seat, and the valve plate faces the valve of the through hole
• the shape of the face is adapted to the plate facing the valve face of the valve plate outside the periphery of the through hole, and the radial dimension of the narrowest portion of the valve face of the valve plate is larger than the radial dimension of the widest portion of the through hole.
• the valve seat is provided with a cylindrical cavity in which the line coincides with the center line of the through hole and has a diameter slightly larger than the base of the valve plate in the inflow direction of the through hole, and the end of the cylindrical cavity facing the through hole and the back through hole are open.
• the above-mentioned toner cartridge for a laser printer has a cylindrical valve core disposed on the end cover thereof, and the cylindrical valve core cooperates with the rotary motion of the developing unit to form a cylindrical valve body, and the carbon in the through hole is recovered along the toner by gravity traction.
• This switch control mode has a good shape matching between the cylindrical valve core and the contact surface around the toner recovery through hole, and the toner recovery through hole is tightly closed, and there is almost no toner reflow.
• the cylindrical valve body itself can obtain excellent sliding characteristics by selecting an appropriate material, so that the switching response of the toner recovery through hole is extremely sensitive and fast, which is extremely advantageous for a developing unit having a high speed rotation requirement.
• both the cylindrical valve core and the contact surface around the toner recovery through-hole can be made of an elastic sealing material, or an elastic sealing material is adhered to the corresponding surface to enhance the toner. Recover the degree of sealing of the through hole in the closed state.
• the valve seat is provided with a protrusion extending toward the through hole at a position corresponding to the through hole
• the valve body is a valve body sleeved on the protrusion, and the cross section of the valve body is along the through hole
• the direction in which the carbon powder flows into the toner recovery chamber gradually increases, and the length of the valve body is larger than the gap between the valve seat and the plate along the direction in which the carbon powder flows into the toner recovery chamber in the through hole, and the through hole faces
• the raised port has a cross section of the same shape as the valve body in the direction in which the toner flows into the toner recovery chamber in the through hole, in which the toner flows into the carbon
• the cross-sectional size of the through-hole toward the raised port is between the cross-sections of the ends of the valve body in this direction.
• the cross section of the projection increases as the cross section of the valve body increases.
• the through hole corresponds to the change in the cross section of the valve body corresponding to the portion into which the valve body is inserted.
• the cross section of the valve body parallel to the direction in which the toner in the through hole flows into the toner recovery chamber is trapezoidal.
• the above-mentioned toner cartridge for a laser printer has a wedge-shaped valve core disposed on the end cover thereof, and the wedge-shaped valve core is engaged with the rotary motion of the developing unit through the wedge-shaped valve core to form a wedge-shaped valve core, and the gravity in the direction of the toner in the through-hole of the toner is recovered. Reciprocating motion, thereby obtaining a state in which the wedge-shaped spool is intermittently abutted against the end of the toner recovery through-hole, or exiting the end of the toner recovery through-hole, thereby being closed or opened by intermittent contact or disengagement The effect of toner recovery through holes.
• This switch control method has a good shape matching between the wedge valve core and the contact surface around the toner recovery through hole, and the toner recovery through hole is tightly closed, and there is almost no toner reflow.
• the wedge-shaped spool itself can obtain excellent sliding characteristics by selecting an appropriate material, so that the switching response of the toner recovery through-hole is extremely sensitive and fast, which is advantageous for a developing unit having a high-speed rotation requirement.
• the wedge core valve and the toner recovery through hole and the peripheral contact surface thereof may be selected from elastic sealing materials, or an elastic sealing material is adhered to the corresponding surface to improve carbon. The degree of sealing of the powder recovery through hole in the closed state.
• FIG. 1 is an exploded perspective view of a first embodiment
• FIGS. 2a and 2b are perspective views reflecting different angles of the end cap of the first embodiment
• FIGS. 3a and 3b are different end covers reflecting the first embodiment.
• Figure 4 & Figure 4d is a schematic view showing various working states of the end cap of the first embodiment
• Figure 5 is an exploded view of the second embodiment
• Figure 6a, Figure 6b are views showing the end of the second embodiment a perspective view of the cover at different angles
• FIGS. 7a and 7b are structural exploded views reflecting different angles of the end cap of the second embodiment
• 8 is a schematic view showing various working states of the end cap of the second embodiment
• FIGS. 10a and 10b are perspective views reflecting different angles of the end cap of the third embodiment.
• 1a and 1b are structural exploded views reflecting different angles of the end cap of the third embodiment;
• Figs. 12 & 12d are schematic views showing various working states of the end cap of the third embodiment.
• BEST MODE FOR CARRYING OUT THE INVENTION First Embodiment Referring to Figure 1, the toner cartridge has a cylindrical shape as a whole, and one end has a diameter slightly larger than the other end.
• the larger diameter end constitutes a toner storage chamber 1 for storing toner, and the smaller end constitutes a toner recovery chamber 2 for retaining residual powder.
• the toner storage chamber 1 and the toner recovery chamber 2 are separated by a partition between the two, so that they are isolated from each other.
• the toner recovery chamber 2 is located at the axial end of the toner cartridge and is sealed by the end cap 4.
• the end cap 4 can be inserted into or taken out of the opening 3 in the axial direction of the opening 3 ( ⁇ shown by the dotted arrow in Fig. 1), and the opening 3 is closed by the seal ring 401 located in the circumferential direction of the skirt of the end cap 4, thus the end cap 4 and the opening Maintain a detachable seal between the three.
• the toner recovery chamber 2 has a passage 201 for the inflow of the toner near the cylinder of the opening 3.
• the projection of the toner inflow passage 201 on the cylinder surface of the toner recovery chamber 2 is circular.
• the projection surface is perpendicular to the inflow direction of the toner located in the toner inflow passage 201.
• Figures 2a, 2b, 3a, 3b show the end cap structure.
• the end cap 4 In a state where the end cap 4 is attached to the opening 3, the end cap 4 has a sheet 402 which projects into the toner recovery chamber 2 in the axial direction of the toner cartridge and is in close contact with the inner wall cylinder of the toner recovery chamber 2.
• the sheet 402 is provided with toner flowing into the through hole 403 at a portion corresponding to the toner inflow passage 201.
• the projection of the toner inflow through hole 403 is circular.
• the projection surface is perpendicular to the inflow direction of the toner located in the toner inflow through hole 403.
• the end cap 4 also has a valve seat 404 which projects into the toner recovery chamber 2 in the axial direction of the toner cartridge.
• the valve seat 404 is located closer to the center axis side of the toner recovery chamber 2 along the toner inflow direction in which the toner flows into the through hole 403. Along the toner inflow direction of the toner flowing into the through hole 403, a gap exists between the valve seat 404 and the plate 402.
• the valve seat 404 is provided with a cylindrical cavity 405 which coincides with the center line of the toner inflow through hole 403.
• the cylindrical cavity 405 is open toward the end of the toner flowing into the through hole 403.
• One end of the cylindrical cavity 405 facing away from the toner inflow through hole 403 is closed by a detachable cover 406.
• the cover 406 is provided with a plurality of openings 407 communicating with the cylindrical chamber 405 and the toner recovery chamber 2.
• a ball 408 is placed inside the cylindrical cavity 405.
• the diameter of the ball 408 is larger than the toner inflow through hole 403 and the opening 407, which is slightly smaller than the cylindrical cavity 405.
• the gap width between the valve seat 404 and the plate 402 is smaller than the diameter of the ball 408.
• the toner inflow through holes 403 are phase-changed so that they are in an upright or inverted state, and the ball 408 is disengaged from the toner inflow through hole 403 in the upward erect state, so that the residual toner in the developing unit is made.
• the ball 408 contacts the toner inflow port 403 in the downwardly inverted state, and the toner inflow through hole 403 is closed.
• 4a, 4b, 4c, 4d show the structure of the end cap of this embodiment in different operating states.
• the laser printer drives the developing unit to rotate counterclockwise as indicated by the dotted arrow Y in the figure to bring the toner cartridge into an upward erect state in which the toner inflow through hole 403 is located at the upper portion of the toner recovery chamber 2.
• the toner inflow passage 201 on the side wall of the toner recovery chamber 2 and the toner inflow through hole 403 on the end cover 4 are directly under the waste toner tank of the developing unit, and the toner in the waste toner box is under the action of gravity. It descends in the direction indicated by the broken line arrow ⁇ in the drawing, and is deposited in the toner inflow passage 201 and the toner inflow through hole 403.
• the ball 408 having a valve function falls under the action of gravity in the direction indicated by the dotted arrow ⁇ in the figure, enters the cylindrical cavity 405, and is finally supported on the cover 406, and the ball 408 is separated from the toner inflow through hole 403.
• the inflow channel of the developing unit waste toner bin to the toner recovery chamber 2 passes the toner back
• the toner inflow passage 201 on the side wall of the receiving chamber 2 and the toner inflow through hole 403 on the end cover 4 are established, and the toner in the waste toner chamber flows into the through hole 403 through the toner, from the valve seat 404 and the plate 402.
• the gap therebetween, and the opening 407 in the cover 406 flow into the toner recovery chamber 2.
• the laser printer drives the developing unit to rotate counterclockwise as indicated by a broken line arrow Y in Fig.
• the ball 408 having a valve action falls under the action of gravity in the direction indicated by the dotted arrow ⁇ in the figure, reaches the port of the toner inflow through hole 403, and is finally supported on the port, so that the spherical surface of the ball 408 is the same as the carbon.
• the toner inflow passage 201 on the side wall of the toner recovery chamber 2 and the toner inflow hole 403 on the end cover 4 are in the toner
• the ball 408 is in the cylindrical cavity 405 under the action of gravity, so as to be out of contact with the port of the toner flowing into the through hole 403, thereby maintaining the developing unit waste toner bin between the toner recovery chamber 2
• the inflow passage is in a clear state; when the toner inflow passage 201 on the side wall of the toner recovery chamber 2 and the toner inflow through hole 403 on the end cover 4 are below the virtual level of the center axis of the toner cartridge, the spherical surface of the sphere 408 The port in which the toner flows into the through hole 403 is kept in contact with each other, and the inflow passage of the developing unit waste toner box to the toner recovery chamber 2 is closed by the ball 408.
• the toner cartridge has a cylindrical shape as a whole, and one end has a diameter slightly larger than the other end.
• the larger diameter end constitutes a toner storage chamber 1 ' for storing toner
• the smaller diameter end constitutes a toner recovery chamber 2' for retaining toner.
• the toner storage compartment 1 ' and the toner recovery compartment 2' are separated by a partition to keep them isolated.
• the opening 3' of the toner recovery chamber 2' at the axial end of the toner cartridge is sealed with an end cap 4'.
• the end cap 4' can be along the axial direction of the opening 3' (with the dotted arrow in the figure)
• the toner cartridge is axially coincident) inserted or removed from the opening 3', and the opening 3' is closed by a sealing ring 401' located on the skirt cylinder of the end cap 4', thus between the end cap 4' and the opening 3' Maintain a detachable seal.
• the toner recovery chamber 2' has a passage 201' for the toner to flow into the cylinder near the opening 3'.
• the residual toner in the developing unit can flow into the toner recovery chamber 2' through the toner inflow passage 201', or the toner inflow passage 201' is a developing unit.
• the residual toner in the inflow into the toner recovery chamber 2' provides an inflow channel.
• the projection of the toner inflow passage 201' on the cylinder of the toner recovery chamber 2' is rectangular, and may of course be circular or other shape whose projection surface is perpendicular to the inflow direction of the toner located in the toner inflow passage 201.
• Figures 6a, 6b, 7a, 7b show the end cap structure of this embodiment.
• the end cap 4' In a state where the end cap 4' is attached to the opening 3', the end cap 4' has an ink-retracting chamber 2' extending in the axial direction ⁇ of the toner cartridge, and is closely attached to the inner wall cylinder of the toner recovery chamber 2'.
• the sheet 402' is provided with a toner inflow through hole 403' corresponding to the portion of the toner inflow passage 201'.
• the projection of the toner into the through hole 403' is square, and of course, it may be a circular shape or the like, and its projection surface is perpendicular to the inflow direction of the toner in the toner flowing through hole 403'.
• the toner inflow passage 201' passes through the toner inflow through hole 403' to establish a communication relationship with the toner recovery chamber 2'.
• the end cap 4' also has a valve seat 404' which projects into the toner recovery chamber 2' along the axial direction ⁇ of the toner cartridge.
• the valve seat 404' is close to the side of the center axis of the toner recovery chamber 2'.
• the valve seat 404' is provided with a cylindrical cavity 405' which coincides with the center line of the toner inflow through hole 403'.
• the cylindrical cavity 405' is open toward the toner inflow through hole 403' and the port facing away from the toner inflow through hole 403'.
• the cylindrical cavity 405' provides support for the base 408' of the valve plate 406' having a diameter greater than the base 408' of the valve plate 406', thereby restricting the base 408' of the valve plate 406' to the axial direction of the cylindrical cavity 405' for movement. .
• the shape of the valve plate 406' toward the valve surface 407' of the toner inflow through hole 403' is adapted to the plate 402' of the valve face 407' of the valve plate 406' outside the periphery of the toner inflow through hole 403'. That is, when the sheet 402' facing the valve surface 407' of the valve plate 406' outside the periphery of the toner inflow hole 403' is flat or curved, the valve plate 406' flows toward the toner.
• the valve face 407' of the bore 403' is also of the same shape so that when the valve face 407' of the valve plate 406' abuts against the plate 402', the two are in close contact without gaps.
• the narrowest portion of the valve face 407' of the valve plate 406' has a radial dimension greater than the radial dimension of the widest portion of the toner inflow through hole 403', such that when the valve face 407' of the valve plate 406' abuts On the plate 402', the toner inflow through hole 403' can be completely closed.
• valve face 407' has a radial dimension greater than that of the cylindrical cavity 405' such that when the base 408' of the valve plate 406' moves in the axial direction of the cylindrical cavity 405', the valve plate 406
• the valve face 407' will be blocked from the cylindrical cavity 405', that is, the spatial position of the valve face 407' of the valve plate 406' will always be limited to the gap between the valve seat 404' and the plate 402'.
• the gap width between the valve seat 404' and the plate 402' is made smaller than the stroke of the base 408' of the valve plate 406' in the cylindrical cavity 405'.
• the toner cartridge in the working state, when the laser printer drives the developing unit to rotate, the toner cartridge will rotate about the axis of the developing device, thereby causing the toner on the side wall of the toner recovery chamber 2' to flow into the passage 201' and the end cover 4.
• the toner inflow through holes 403' on the 'phase change, so that they are in an upright or downward inverted state, and the valve surface 407' of the upright state valve plate 406' is disengaged from the toner inflow through hole 403.
• FIG. 8a, 8b, 8c, 8d show the construction of the end caps of the present embodiment in different operating states. Wherein, in each state, the carbon powder flowing into the through hole 403' on the end cover 4' passes through the toner inflow passage 201' on the side wall of the toner recovery chamber 2', together with the waste toner box in the developing unit (not shown in the figure) Show) are kept connected. Referring to Fig.
• the laser printer drives the developing unit to rotate counterclockwise as indicated by the dotted arrow Y in the figure to the upright state in which the toner cartridge is in its toner inflow through hole 403' in the upper portion of the toner recovery chamber 2'.
• the toner inflow passage 201' on the side wall of the toner recovery chamber 2' and the toner inflow through hole 403' on the end cover 4' are located directly below the waste toner tank of the printer developing unit, and the carbon in the waste toner box
• the powder descends in the direction indicated by the dotted arrow ⁇ in the figure under the traction of gravity, and is deposited in the toner inflow passage 201' and the toner inflow through hole 403'.
• valve plate 406' having a valve function is free to fall under the action of gravity in the direction indicated by the dotted arrow ⁇ in the figure, so that the base 408' enters the cylindrical cavity 405. In the end, it is supported on the valve seat 404' through its valve surface 407', and the valve surface 407' of the valve plate 406' is separated from the contact with the toner inflow port 403', and the developing unit waste toner bin is sent to the toner recovery chamber.
• the 2' inflow passage is established through the toner inflow passage 201' on the side wall of the toner recovery chamber 2' and the toner inflow through hole 403' on the end cover 4', and the toner in the waste toner chamber passes through the toner inflow
• the through hole 403' flows into the toner recovery chamber 2' from the gap between the valve seat 404' and the plate 402', and the cylindrical cavity 405' on the valve seat 404'.
• the laser printer drives the developing unit to rotate counterclockwise as indicated by the dotted arrow Y to place the toner cartridge in a downwardly inverted state in which the toner inflow through hole 403' is located at the lower portion of the toner recovery chamber 2'.
• the toner inflow passage 201' on the side wall of the toner recovery chamber 2' and the toner inflow through hole 403' on the end cover 4' are directly above the waste toner tank of the printer developing unit, and the toner recovery chamber
• the toner in 2' descends in the direction indicated by the dotted arrow ⁇ in the figure by gravity, and is deposited in the port of the toner flowing into the through hole 403'.
• the valve plate 406' having a valve action falls under the action of gravity in the direction indicated by the dotted arrow ⁇ in the figure, reaches the port of the toner flowing into the through hole 403', and is finally supported by the port through the valve face 407'.
• valve surface 407' of the valve plate 406' is brought into contact with the port of the toner inflow through hole 403', and the inflow passage of the developing unit waste toner box to the toner recovery chamber 2' is closed by the valve face 407', and the toner has flowed in.
• the toner in the recovery chamber 2' is enclosed in the toner recovery chamber 2'.
• valve plate 406' When the axis of the toner cartridge is above the virtual water level, the valve plate 406' is substantially in the cylindrical cavity 405' under the action of gravity, so as to be out of contact with the toner flowing into the port of the through hole 403', thereby maintaining the waste toner tank of the developing unit.
• the inflow passage to the toner recovery chamber 2' is in a clear state; the toner inflow passage 201' on the side wall of the toner recovery chamber 2' and the toner inflow through hole 403' on the end cover 4' are in the toner
• the valve surface 407' of the valve plate 406' is kept in contact with the port of the toner inflow through hole 403', and the inflow passage of the developing unit waste toner box to the toner recovery chamber 2' is received by the valve plate 406.
• the valve face 407' is closed.
• the toner cartridge has a cylindrical shape as a whole, and one end has a diameter slightly larger than the other end.
• the larger end constitutes a toner storage chamber 1'' for storing toner, and the smaller diameter end constitutes a toner recovery chamber 2'', and the toner recovery chamber 2'' is retained for use after being used by the developing device. Toner.
• the toner storage compartment 1'' and the toner recovery compartment 2'' are separated by a partition to keep them in isolation.
• the opening 3'' on the toner recovery chamber 2'' at the axial end of the toner cartridge is sealed with an end cap 4''.
• the end cap 4'' can be inserted into or taken out of the opening 3'' along the axial direction of the opening 3'' (which coincides with the axis of the toner cartridge indicated by the dashed arrow a in the figure) through the skirt cylinder located at the end cap 4''.
• the upper seal ring 401'' closes the opening 3'' so that the end cap 4" and the opening 3" are maintained in a detachable sealed state.
• the toner recovery chamber 2" has a passage 201'' for the toner to flow into the cylinder near the opening 3''. In operation, the residual toner in the developing unit can pass through when the laser printer developing unit rotates to an appropriate phase.
• the toner inflow passage 201'' flows into the toner recovery chamber 2'', or the toner inflow passage 201'' provides an inflow channel for the residual toner in the developing unit to flow into the toner recovery chamber 2''.
• the projection of the toner inflow passage 201'' on the cylinder surface is rectangular, and may of course be circular or other shape whose projection surface is perpendicular to the inflow direction of the toner in the toner inflow passage 201''.
• 10a, 10b, 11a, 11b show the end cap structure of the toner cartridge for the laser printer of the present invention.
• the end cap 4'' In the state in which the end cap 4'' is mounted to the opening 3'', the end cap 4'' has an axial direction along the toner cartridge a sheet 402'' which protrudes into the toner recovery chamber 2'' and is in close contact with the inner wall cylinder of the toner recovery chamber 2''.
• the sheet 402'' corresponds to the toner inflow passage 201''
• the portion is provided with a toner inflow through hole 403''.
• the toner flows into the passage 201'' and the carbon
• the inflow vias 403'' are in abutting communication with each other to provide a complete inflow channel for the residual toner in the developing unit to flow into the toner recovery chamber 2''.
• the projection of the toner inflow through hole 403'' is rectangular, and may of course be a circle.
• the end cap 4'' also has a valve seat 404'' which projects into the toner recovery chamber 2'' along the axial direction ⁇ of the toner cartridge.
• the valve seat 404'' is adjacent to the center side of the toner recovery chamber 2'' along the direction in which the toner flows into the through hole 403''.
• valve seat 404'' is provided with a projection 405'' extending toward the toner inflow through hole 403'' at a position corresponding to the toner inflow through hole 403''.
• a valve body 406'' is fitted over the outer surface of the projection 405''.
• the cross section of the valve body 406'' gradually increases, on the side Upward, the length of the valve body 406'' is greater than the gap remaining between the valve seat 404'' and the plate 402''.
• the port in which the toner flows into the through hole 403'' toward the projection 405'' has the same shape as the valve body 406'' Cross section.
• the toner flows into the through hole 403''.
• the cross-sectional size of the port toward the projection is in the direction of the valve body 406' 'Between the ends of the cross section.
• the valve body 406'' having a wedge shape or a frustum-like shape will infiltrate the toner into the carbon in the toner inflow hole 403'' under the action of its own gravity in response to the phase change of the toner cartridge.
• the displacement of the powder recovery chamber 2" is displaced, and the outer surface of the valve body 406'' is adhered to the port of the toner flowing through hole 403'' toward the protrusion 405'' to form the valve body 406'' to the toner
• the carbon powder flows into the toner recovery chamber 2'' along the toner inflow through hole 403'', the cross section of the projection 405'' and the valve body
• the cross section of 406'' is increased by the same amount. This is advantageous for forming an excellent fit between the protrusion 405'' and the valve body 406'.
• the toner flows into the carbon in the toner inflow hole 403''.
• the portion of the toner inflow through hole 403'' corresponding to the valve body 406'' extending therein maintains the same change as the cross section of the valve body 406''.
• the valve can be enlarged.
• the body 406" is in contact with the contact surface of the toner into the through hole 403'' to improve the sealing property.
• the cross section of the valve body 406'' parallel to the toner inflow through hole 403'' in the direction in which the toner flows into the toner recovery chamber 2'' adopts an isosceles trapezoidal shape.
• the valve body 406'' when the valve body 406'' flows between the projection 405'' and the toner inflow through hole 403'', the toner flows into the toner recovery chamber 2 in parallel with the toner inflow through hole 403''.
• the valve body 406'' When the '' direction is moved, the valve body 406'' will be confined in a suitable space between the projection 405'' and the toner inflow through hole 403'', that is, the carbon flowing into the through hole 403'' along the toner.
• the powder flows into the direction of the toner recovery chamber 2'', which is defined in such a manner that the length of the valve body 406'' is larger than the gap remaining between the valve seat 404'' and the plate 402'', thereby ensuring the valve body 406' 'Can be stably supported on the projection 405'' without falling off, or falling into the toner recovery chamber 2" from the gap left between the valve seat 404'' and the plate 402''.
• the toner cartridge will rotate around the shaft of the developing device, thereby causing the toner to flow into the side wall of the toner recovery chamber 2''.
• the toner inflow through hole 403'' on the 201" and the end cap 4'' undergoes a phase change, causing them to be upright or inverted upside down, and thus the valve body 406'' is detached from the toner in the upright state.
• the inflow through hole 403'' is contacted to cause residual toner in the developing unit to fall into the toner recovery chamber 2'', or to contact the toner inflow port 403'' at the outer surface of the valve body 406'' in the inverted state.
• the carbon powder flows into a portion of the through hole 403'' which is inwardly inward, and closes the toner inflow through hole 403''.
• 12a, 12b, 12c, and 12d show the toner cartridge end cover for the laser printer of the present invention under different working conditions.
• the toner inflow through hole 403'' on the end cover 4'' passes through the toner inflow passage 201'' on the side wall of the toner recovery chamber 2'', together with the waste toner in the developing unit
• the cartridge (not shown) is kept in communication.
• the laser printer drives the developing unit to rotate counterclockwise as indicated by the dotted arrow Y in the figure to place the toner cartridge in its toner inflow through hole 403'' at the toner recovery. Room 2' 'upper upright state.
• toner The toner inflow passage 201'' on the side wall of the receiving chamber 2'' and the toner inflow through hole 403'' on the end cover 4'' are directly under the waste toner compartment of the printer developing unit, and the toner in the waste toner box It descends in the direction indicated by the broken line arrow ⁇ in the figure by gravity, and is deposited in the toner inflow passage 201" and the toner inflow through hole 403''.
• valve body 406'' having a valve function is free to fall under the action of gravity in the direction indicated by the dotted arrow ⁇ in the figure, so that the concave bowl-shaped portion or the funnel-shaped portion is nested on the projection 405''
• the protrusion 405'' is supported on the valve seat 404'', and the outwardly protruding valve surface of the valve body 406'' is out of contact with the toner inflow port 403'' port and its vicinity, and the developing unit waste toner
• the inflow passage of the cartridge-to-toner recovery chamber 2'' is established through the toner inflow passage 201'' on the side wall of the toner recovery chamber 2'' and the toner inflow through-hole 403'' on the end cap 4''.
• the toner in the waste toner tank of the developing unit passes through the toner inflow through hole 403'', and flows into the toner recovery chamber 2'' from the gap between the valve seat 404'' and the plate 402''.
• the laser printer drives the developing unit to rotate counterclockwise as indicated by the dotted arrow Y in the figure to the downwardly inverted state in which the toner cartridge is in its toner inflow through hole 403'' located below the toner recovery chamber 2''. .
• the valve face end finally protrudes into a portion of the toner inflow through hole 403'' which extends into the interior thereof, so that the valve body surface of the valve body 406'' is formed with the port of the toner flowing into the through hole 403'' and the inner wall of the portion.
• the inflow passage of the developing unit waste toner box to the toner recovery chamber 2'' is closed by the outwardly protruding valve surface of the valve body 406'', and the toner that has flowed into the toner recovery chamber 2'' is closed to the carbon.
• the powder recovery chamber is 2".
• the invention adopts a gravity valve plug which is moved by the plate piece, the valve seat and the moving valve core to open and close the recovery passage on the toner recovery chamber, and replaces the hinged plate gate, and has the toner recovery through hole closed tightly and almost no toner
• the switching response of the reflow and toner recovery through-holes is extremely sensitive and fast, and is advantageous for a developing unit having a high-speed rotation requirement.

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Citations (4)

• 2007
  • 2007-09-17 WO PCT/CN2007/070704 patent/WO2008040232A1/zh active Application Filing

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