JP2010054648A - Developing device, process cartridge using the same, and image forming apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a developing device that restricts developer from staying at an axial end of a developer conveying member, and to provide a process cartridge using the same, and an image forming apparatus. <P>SOLUTION: The developing device includes: a toner supply chamber 5 having a developing roller 2 that conveys toner to an area opposing a photoreceptor 1, and a supply roller 3 that supplies toner to a developing roller 1; a toner storage chamber 6 disposed above the toner supply chamber 5 and storing toner for supplying toner to the toner supply chamber 5; a partition wall 7 separating the toner supply chamber 5 and toner storage chamber 6 and having a plurality of openings 8; and conveying members 9 and 10 that convey toner in the toner supply chamber 5 and toner in the toner storage chamber 6 in an axial direction. The developing device is provided with the partition plates 13 dividing the toner supply chamber 5 into a plurality of compartments along the axial direction of the conveying member 9 in positions opposing the openings 8 except near both ends in the axial direction out of the openings 8 provided to the partition wall 7. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a developing device that develops a latent image on a latent image carrier with a developer carrier that carries the developer, and a process cartridge and an image forming apparatus using the same.

  Conventionally, a developer supply chamber having a developer supply member for supplying a developer to a developer carrier and a developer storage chamber for storing a developer for replenishing the developer supply chamber are provided. It is well known (for example, Patent Documents 1, 2, 3, and 4). In these developing devices, the developer is not biased in the axial direction of the developer supply chamber, and the deteriorated toner collected from the developer carrier and the undeteriorated toner in the developer storage chamber are sufficiently mixed. Toner can be circulated and conveyed.

  12 includes a toner supply chamber 105 that supplies toner to the developing roller 102 and a toner storage chamber 106 that stores toner to be supplied to the toner supply chamber 105. The toner supply chamber 105 includes a supply roller 103 that supplies toner to the developing roller 102, a regulating member 104 that regulates the toner layer on the developing roller 102, and the like. In addition, a partition wall 104 is provided between the toner supply chamber 105 and the toner storage chamber 106, and openings 108 are provided at both end portions and a central portion of the partition wall 104 in the axial direction. The toner supply chamber 105 and the toner storage chamber 106 are provided with conveying members 109 and 110 that convey the toner in the chamber in the axial direction, respectively. In the developing device configured as described above, the toner supplied to the developing roller 102 by the supply roller 103 is conveyed to the layer regulating member 104 as the developing roller 102 rotates, and the layer thickness is regulated. It is conveyed to the developing area which is the opposite position. In the development area, the toner moves to the surface of the photoconductor 101 and is developed in accordance with the development bias applied to the development roller 102 and the latent image electric field formed by the electrostatic latent image on the photoconductor 101. The toner not developed on the photosensitive member 101 but left on the developing roller 102 is peeled off and collected from the developing roller 102 by the supply roller 103 and sent to the toner supply chamber 105.

  Here, as shown in FIG. 13, the toner in the toner supply chamber 105 is transported from the central portion in the axial direction toward both ends by the rotation of the transport member 109, and then the indoor walls 114A and 114B at both ends. And is guided to the upper opening 108 by the force. The toner that has passed through the opening 108 and has flowed into the toner storage chamber 106 is transported from both ends toward the center by the transport member 110. The toner conveyed to the central portion passes through the central opening 108 due to its own weight and is guided into the toner supply chamber 105. The toner fed into the toner supply chamber 105 may be biased in the axial direction of the toner supply chamber 105 depending on the toner consumption conditions, or may be deteriorated due to the regulation by the layer regulating member 104 or the supply roller 103. However, the series of toner flows as described above eliminates the bias of the toner in the toner supply chamber 105, and deteriorates the toner collected in the supply roller 103 from the developing roller 102 and the toner storage chamber 106. Mix with toner that is not.

JP 2007-292903 A JP 2008-15105 A JP 2007-86325 A JP 2001-194 483 A

  However, when the distance in the axial direction (longitudinal direction) becomes long as in a developing device compatible with A3 size recording paper, the transport distance for transporting the developer in the axial direction also becomes long and must be transported. The amount of developer also increases. Therefore, as shown in FIG. 14, the developer pressure becomes higher than necessary at both ends in the axial direction of the developer conveying member 109 ', and the developer tends to stay. As a result, the developer in the staying portion X may be deteriorated, or the driving torque of the developer conveying member 109 ′ may increase and the driving may be stopped. In FIG. 14, members having the same configuration except for the length in the axial direction are different from those shown in FIG.

  The present invention has been made in view of the above problems, and an object of the present invention is to use a developing device capable of suppressing the retention of developer at the axial end portion of the developer conveying member, and the same. A process cartridge and an image forming apparatus are provided.

In order to achieve the above object, a developer supply comprising a developer carrier that carries a developer and conveys the developer to a portion facing the latent image carrier, and a developer supply member that supplies the developer to the developer carrier. A developer storage chamber disposed above the developer supply chamber and containing a developer for replenishing the developer supply chamber, and a supply chamber for transporting the developer in the developer supply chamber in the axial direction. A developer transport member, a storage chamber developer transport member that transports the developer in the developer storage chamber in the axial direction, a first chamber having a plurality of openings that partitions the developer supply chamber and the developer storage chamber. In the developing device including the partition member, the developer supply chamber is provided at a position facing at least one or more of the openings provided in the first partition member except for the vicinity of both end portions in the axial direction. A first partition that is divided into a plurality of partition spaces along the axial direction of the developer conveying member. It is characterized in further comprising a partition member.
According to a second aspect of the present invention, in the transfer device according to the first aspect, the second partition member is formed with a hole through which the shaft of the supply chamber developer conveying member passes, and the size of the hole is determined by the supply chamber development It is smaller than the outer diameter of the agent transport member.
According to a third aspect of the present invention, in the developing device according to the first or second aspect, the second partition member has an acute-angled shape at the tip portion facing the developer carrier.
According to a fourth aspect of the present invention, in the developing device according to the first, second, or third aspect, the closest distance between the developer carrier and the tip of the second partition member is the developer carrier and the supply chamber. It is characterized by being larger than the closest distance to the developer conveying member.
According to a fifth aspect of the present invention, in the developing device according to the first, second, third or fourth aspect, the second partition member is an even number.
According to a sixth aspect of the present invention, in the developing device according to the first, second, third, fourth, or fifth aspect, the second partition member forms a boundary at an opening portion provided at an axially central portion of the supply chamber developer conveying member. It is characterized by being provided so that it may become symmetrical.
A seventh aspect of the present invention is the developing apparatus according to the first, second, third, fourth, fifth or sixth aspect, wherein the rotation direction of the supply chamber developer conveying member is a downward direction at a position facing the developer carrying member. It is characterized by being.
According to an eighth aspect of the present invention, in the developing device according to the first, second, third, fourth, fifth, sixth, or seventh aspect, a plurality of the accommodating chamber developer conveying members are provided.
According to a ninth aspect of the present invention, in the developing device according to the first, second, third, fourth, fifth, sixth, seventh, or eighth aspect, the supply chamber developer conveying member includes a paddle in the vicinity of the opening. To do.
A tenth aspect of the present invention is the developing device according to the first, second, third, fourth, fifth, sixth, seventh, eighth, or ninth aspect, wherein the supply chamber developer conveying member is an axial end portion or the second partition. In the vicinity of the member, a reverse transport unit that transports the developer in a direction opposite to the developer transport direction is provided.
The invention according to claim 11 is a latent image carrier for carrying a latent image, a charging means for uniformly charging the latent image carrier, a developing means for developing a latent image on the latent image carrier, and the latent image carrier. A process cartridge that integrally supports at least one means selected from cleaning means for cleaning the body and is detachable from the main body of the image forming apparatus. 4, 5, 6, 7, 8, 9 or 10 developing device is used.
According to a twelfth aspect of the present invention, in an image forming apparatus comprising a latent image carrier that carries a latent image and a developing unit that develops the latent image, the developing unit includes the first, second, third, fourth, and fifth. , 6, 7, 8, 9 or 10 is used.
In the present invention, the developer supply chamber is divided into a plurality of partition spaces along the axial direction by the second partition member. Most of the developer conveyed by the supply chamber developer conveying member abuts against the inner walls and the second partition members at both ends and moves upward, and is conveyed by the accommodating chamber developer conveying member in the developer accommodating chamber. Most of the toner moves downward from the opening due to its own weight, and the developer circulates up and down between the two chambers in each partition space. Therefore, even if the length of the developing device in the axial direction is increased, the developer pressure is not applied to both ends in the axial direction of the developer conveying member more than necessary, so that the developer is less likely to stay at both ends in the axial direction.

  According to the present invention, there is an excellent effect that it is possible to provide a developing device capable of suppressing the retention of the developer at the axial end portion of the developer conveying member, and a process cartridge and an image forming apparatus using the developing device.

  Hereinafter, an embodiment of a developing device to which the present invention is applied will be described. FIG. 1 is a schematic configuration diagram showing the configuration of the developing device. This developing device uses a one-component developer made of toner and performs a contact developing method. As shown in FIG. 1, the developing device supplies a toner to the developing roller 2, which is a developer carrying member that carries toner and conveys it to a portion facing the photosensitive member 1 that is a latent image carrying member. And a toner supply chamber 5 that is a developer supply chamber provided with a supply roller 3 that is a developer supply member, a layer regulating member 4 that regulates the thickness of the toner layer on the development roller 2, and the like. The supply roller 3 is disposed in contact with the developing roller 2 with a constant force. At this time, if at least one of the developing roller 2 and the supply roller 3 is an elastic body, there is no problem in contact with each other. However, if the developing roller 2 is an inelastic body, the layer regulating member 4 must be an elastic body, and the photosensitive member 1 must be in a non-contact position with the belt or the developing roller 2. In addition, the developing device includes a toner storage chamber 6 that is a developer storage chamber that stores toner for replenishing the toner supply chamber 5 above the toner supply chamber 5. The toner supply chamber 5 and the toner storage chamber 6 are separated by a partition wall 7 that is a first partition member, and an opening 8 is provided in the partition wall 7 as described later. Further, in the toner supply chamber 5 and the toner storage chamber 6, transport members 9 and 10 for transporting the toner in the axial direction are provided.

  In the developing device having the above-described configuration, a supply bias having a value offset in the same direction as the charging polarity of the toner is applied to the supply roller 3 with respect to the development bias. The supply bias acts in a direction in which the toner preliminarily charged at the contact portion with the developing roller 2 is pressed against the developing roller 2. The supply roller 3 applies and supplies the toner, which has been rotated and adhered to the surface, to the surface of the developing roller 2. A developing bias for forming an electric field between the developing roller 2 and the photosensitive member 1 is applied. The developing roller 2 rotates counterclockwise and conveys the toner held on the surface to a position facing the layer regulating member 4 and the photoreceptor 1. The layer regulating member 4 has a free end brought into contact with the surface of the developing roller 2 with a pressing force of 10 to 80 N / m, and the toner passing under the pressing is thinned and given an electric charge by frictional charging. To do. Further, in order to assist frictional charging, the layer regulating member 4 is applied with a regulating bias having a value offset in the same direction as the toner charging polarity with respect to the developing bias. The photosensitive member 1 rotates in the clockwise direction, and the surface of the developing roller 2 moves in the same direction as the traveling direction of the photosensitive member 1 at a position facing the photosensitive member 1. The thinned toner is conveyed to a position facing the photosensitive member 1 by the rotation of the developing roller 2, and a latent image formed by the developing bias applied to the developing roller 2 and the electrostatic latent image on the photosensitive member 1. In response to the electric field, it moves to the surface of the photoreceptor 1 and is developed. A contact sheet 11 is provided in contact with the developing roller 2 by the elastic force of the elastic member 12 at a portion where the toner remaining on the developing roller 2 without being developed on the photoreceptor 1 returns to the toner supply chamber 5 again. The toner is sealed so as not to leak out of the developing device. The toner that has passed through the contact sheet 11 is peeled off and collected from the developing roller 2 by the supply roller 3 on the downstream side. The toner peeled from the developing roller 2 is sent into the toner supply chamber 5 by the supply roller 3.

  FIG. 2 is a front view showing the configuration of the developing device. As shown in FIG. 2, the partition wall 7 that partitions the toner supply chamber 5 and the toner storage chamber is provided at equal intervals between the openings 8A and 8B provided at both ends in the axial direction and the openings 8A and 8B. There are three openings 8C, 8D, 8E formed. Plate-shaped partition plates 13C and 13E, which are second partition members that partition the toner supply chamber 5 into a plurality of partition spaces along the axial direction, are provided at positions facing the openings 8C and 8E. Here, the partition surface facing the partition space of the partition plates 13C and 13E extends in a direction orthogonal to the axial direction. The toner in the toner supply chamber 5 is transported from the central part in the axial direction toward both ends by the rotation of the transporting member 9, and hits against the partition plates 13C and 13E or the inner walls 14A and 14B at the axial end part and the force thereof. Are led to the upper openings 8A, 8B, 8C, 8D and 8E. The toner that has passed through the openings 8A, 8B, 8C, 8D, and 8E and has flowed into the toner storage chamber 6 is conveyed by the conveying member 10 from the end portion toward the central portion, and the openings 8D and 8C (partition plates) by its own weight. 13 </ b> C) and 8 </ b> E (before the partition plate 13 </ b> E) and is guided into the toner supply chamber 5. Thus, most of the developer in the toner supply chamber 5 and the toner storage chamber 6 circulates up and down in the partition space divided by the partition members 13C and 13E and the opening 8D. Therefore, even if the width of the developing device is increased in the axial direction, the inner walls 14A and 14B at both ends in the axial direction of the conveying members 9 and 10 are not subjected to excessive powder pressure, and the axial direction of the conveying members 9 and 10 is increased. It is difficult for toner to stay at both ends. In addition, the partition plates 13C and 13E in FIG. 2 are configured to protrude slightly upward from the openings 8C and 8E. The upper end of the partition plate 13 may be adjusted to the height of the partition wall 7, but the effect of circulating the developer up and down is higher when the partition plate 13 protrudes upward from the openings 8C and 8E.

  FIG. 3 is a plan view for explaining the shape of the partition plate. FIG. 4 is an enlarged configuration diagram of a main part for explaining the configuration of the conveying member and the partition plate. As shown in FIGS. 3 and 4, the partition plate 13 has a trapezoidal shape in which one side 13 b facing the developing roller 2 is cut obliquely, the bottom side faces the supply roller 3, and the remaining two sides The inner wall of the toner supply chamber 5 and the partition wall 7 are fixed. A hole 13a is provided in one side 13b of the partition plate 13 facing the developing roller 2 so that the shaft 9a of the conveying member 9 passes therethrough. The size of the hole 13a is larger than the diameter x of the shaft 9a. It is formed smaller than the outer diameter y of the blade portion 9 b of the member 9. In order for the toner conveyed by the conveying member 9 to efficiently move from the toner supply chamber 5 to the toner storage chamber 6, the size of the hole 13a is larger than the diameter x of the shaft 9a and the outside of the blade portion 9b. It is preferably smaller than the diameter y.

  FIG. 5 is a cross-sectional view illustrating the shape of the partition plate. FIG. 6 is a cross-sectional view illustrating the shape of a partition plate different from that in FIG. As shown in FIG. 5, the partition plate 13 according to the present embodiment has an acute-angled shape on one end 13 b facing the developing roller 2. By setting the tip shape of one side of the partition plate 13 to an acute angle shape, toner does not stay between the partition plate 13 and the developing roller 2. On the other hand, as shown in FIG. 6, when the tip shape of one side 13′b of the partition plate 13 ′ is formed in parallel with the peripheral surface of the developing roller 2, the partition plate 13 ′ and the developing roller 2 The toner tends to stay between. Similarly, the tip shape of one side facing the supply roller 3 of the partition plate 13 is also an acute angle shape. By making the tip of one side of the partition plate 13 facing the supply roller 3 an acute angle, toner does not stay between the partition plate 13 and the supply roller 3.

  FIG. 7 is an enlarged configuration diagram of a main part showing the configuration of the developing device. As shown in FIG. 7, the partition plate 13 is disposed such that one side 13 b facing the developing roller 2 is a distance z longer than the closest distance between the developing roller 2 and the conveying member 9. . This is because if one side 13 b of the partition plate 13 facing the developing roller 2 is too close to the developing roller 2, toner stagnates between the partition plate 13 and the developing roller 2, which is not preferable.

  In the present embodiment, two partition plates 13 (13C, 13E) are provided. The number of partition plates 13 is not particularly limited, but is preferably an even number. If the number is even, a plurality of partition plates 13 can be provided symmetrically with respect to the opening 8D provided in the central portion in the axial direction, and the size of the partition space can be made the same. Therefore, variations in toner deterioration in the partition space between the toner storage chamber 5 and the toner supply chamber 6 are suppressed.

  FIG. 8 is a schematic configuration diagram illustrating the shape of a toner reservoir in the developing device. As shown in FIG. 8, the rotation direction of the conveying member 9 is preferably a downward direction at a position facing the developing roller 2, that is, a counterclockwise direction in the drawing. As a result, the draft line of the toner T in the toner supply chamber 5 rises on the right wall side in the figure, the developing roller 2 side falls, and the toner powder pressure between the partition plate 13 and the developing roller 2 is weakened. It is suppressed.

  In the developing device, a plurality of developer conveying members may be provided in the toner storage chamber 6. FIG. 9A is a top view showing the configuration of another developing device, and FIG. 9B is a front view showing the configuration of this developing device. In the following, the same members as those described above are denoted by the same reference numerals in the drawings, and description thereof is omitted. As shown in FIGS. 9A and 9B, the toner storage chamber 6 may be provided with two transport members 10A and 10B. Thereby, the deteriorated toner collected in the toner storage chamber 6 and the new toner in the toner storage chamber 6 can be sufficiently mixed.

  In the developing device, the transport member 9 may be provided with a paddle at a position facing the opening 8. FIG. 10 is an enlarged front view of a main part showing a configuration in the vicinity of the opening of the conveying member. For example, as shown in FIG. 10, the transport member 9 may be provided with a paddle 15 upstream of the partition plate 13 in the transport direction. The paddle 15 provided in the vicinity of the partition plate 13 can efficiently lift and move the toner conveyed by the conveying member 9 from the opening to the toner storage chamber 6 side.

  In the developing device, the transport member 9 may be provided with a reverse transport unit that transports toner in the direction opposite to the toner transport direction of the transport member 9 in the vicinity of the axial end or the partition plate 13. FIG. 11 is an enlarged front view of a main part showing a configuration in the vicinity of the end of the conveying member. As shown in FIG. 11, a reverse transport unit 16 that transports toner in a direction opposite to the toner transport direction of the transport member 9 may be provided at the end of the transport member 9 in the toner supply chamber 5. The toner flow is blocked by the inner wall 14 </ b> A at the end of the toner storage chamber 5, but the toner accumulation is alleviated by the reverse conveying unit 16.

As described above, according to the developing device of the present embodiment, the toner supply chamber 5 and the toner storage chamber 6 are divided into a plurality of portions along the axial direction by the partition plate 13 that is the second partition member. Therefore, even if the length of the developing device in the axial direction is increased, the developer pressure is not applied to both ends in the axial direction of the conveying member 9 more than necessary, so that it is difficult for the developer to stay at both ends in the axial direction.
Further, according to the developing device according to the present embodiment, the partition plate 13 is formed with the hole 13a through which the shaft 9a of the conveying member 9 passes, and the size of the hole 13a is outside the blade portion 9b of the conveying member 9. Smaller than the diameter. Accordingly, the developer in the toner supply chamber 5 and the toner storage chamber 6 can be efficiently circulated up and down.
Further, according to the present embodiment, the partition plate 13 has an acute-angled tip shape on one side 13 b facing the developing roller 2. Thereby, it is difficult to collect toner between the partition plate 13 and the developing roller 2.
Further, according to the developing device according to the present embodiment, the closest distance between the developing roller 2 and the one side 13 b of the partition plate 13 is larger than the closest distance between the developing roller 2 and the conveying member 9. Thereby, it is difficult to collect toner between the partition plate 13 and the developing roller 2.
Moreover, according to the developing device according to the present embodiment, an even number of partition plates 13 are provided. As a result, toner circulation can be formed symmetrically with respect to the central portion of the conveying member 9 in the axial direction, and variations in toner deterioration are suppressed.
Further, according to the developing device according to the present embodiment, the partition plate 13 is provided so as to be symmetric with respect to the opening 8D provided in the central portion of the transport member 9 in the axial direction. As a result, the partition spaces are formed in the same size, and variations in toner deterioration are suppressed.
Further, according to the developing device according to the present embodiment, the rotation direction of the conveying member 9 is a downward direction at a position facing the developing roller 2. Thereby, the toner powder pressure between the partition plate 13 and the developing roller 2 is weakened, and the deterioration of the toner is suppressed.
Further, according to the developing device according to the present embodiment, the toner storage chamber 6 includes the plurality of transport members 10A and 10B. Thereby, the deteriorated toner and the non-deteriorated toner can be sufficiently mixed.
Further, according to the developing device according to the present embodiment, the agent conveying member 9 includes the paddle 15 in the vicinity of the opening 8. The paddle 15 can efficiently lift and move the toner conveyed by the conveying member 9 from the opening 8 toward the toner storage chamber 6.
Further, according to the developing device according to the present embodiment, the transport member 9 transports the developer in the direction opposite to the developer transport direction to the vicinity of the inner walls 14A, 14B or the partition plate 13 at the axial end. A reverse conveyance unit 16 is provided. The flow of toner is blocked by the inner walls 14A and 14B and the partition plate 13 at the end in the axial direction.
Further, the process cartridge and the image forming apparatus equipped with the developing device according to the present embodiment do not deteriorate the developer or increase the driving torque due to the stay of toner at the axial end of the developer conveying member 9, so that the high quality A stable image can be obtained.
Although not shown, the developing device according to the present embodiment is, for example, an image forming device that directly transfers a toner image formed on a photoconductor to printing paper, or a toner image on the photoconductor is temporarily transferred to an intermediate transfer member. Thereafter, it can be mounted on an image forming apparatus for transferring the toner image on the intermediate transfer member onto the printing paper. Further, even in a monochrome image forming apparatus having one photoconductor and one developing device 4, a toner image for each color is sequentially formed on one photoconductor, and each color toner image on the photoconductor is sequentially transferred intermediately. A color image forming apparatus that superimposes and transfers onto a body or printing paper may be used. Further, for example, a plurality of image forming units including photoconductors are arranged side by side, toner images of different colors are formed on the photoconductors of the image forming units, and the toner images on the photoconductors are transferred to an intermediate transfer member or printing paper. It may be a tandem type color image forming apparatus that superimposes and transfers the image.

FIG. 2 is a schematic configuration diagram illustrating a configuration of a developing device according to the present embodiment. FIG. 2 is a front view showing a configuration of the developing device. (A) (b) is a top view explaining the shape of the partition plate of the developing device. FIG. 2 is an enlarged configuration diagram of a main part for explaining a configuration of a conveying member and a partition plate of the developing device. Sectional drawing explaining the front-end | tip shape of the partition plate of the developing device. Sectional drawing explaining the front-end | tip shape of another partition plate. FIG. 2 is an enlarged configuration diagram of a main part showing a configuration of the developing device. FIG. 3 is a schematic configuration diagram illustrating a shape of a toner reservoir in the developing device. (A) is a top view showing the configuration of another developing device, (b) is a front view showing the configuration of this developing device. The principal part enlarged front view which shows the structure of the opening part vicinity of a conveyance member. The principal part enlarged front view which shows the structure of the edge part vicinity of a conveyance member. FIG. 10 is a schematic configuration diagram illustrating a configuration of a conventional developing device. The front view which shows the structure of the conventional image development apparatus. The front view which shows the structure of another conventional image development apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Photoconductor 2 Developing roller 3 Supply roller 4 Layer control member 5 Toner supply chamber 6 Toner storage chamber 7 Partition wall 8 Opening 9 Transport member 10 Transport member 11 Contact sheet 12 Elastic member 13 Partition plate

Claims (12)

A developer carrying member that carries the developer and conveys the developer to a portion facing the latent image carrying member; a developer supply chamber that has a developer supply member that supplies the developer to the developer carrying member; and the developer supply A developer storage chamber disposed above the chamber and storing a developer for replenishing the developer supply chamber; a supply chamber developer transport member for transporting the developer in the developer supply chamber in the axial direction; Development including a storage chamber developer transport member that transports the developer in the developer storage chamber in the axial direction, and a first partition member that partitions the developer supply chamber and the developer storage chamber and has a plurality of openings. In the device
The developer supply chamber is arranged along the axial direction of the supply chamber developer transport member at a position facing at least one or more openings other than the vicinity of both ends in the axial direction of the openings provided in the first partition member. A developing device comprising a second partition member that is divided into a plurality of partition spaces. The transfer device according to claim 1.
The second partition member is formed with a hole through which the shaft of the supply chamber developer transport member passes, and the size of the hole is smaller than the outer diameter of the supply chamber developer transport member. apparatus. The developing device according to claim 1 or 2,
The developing device according to claim 2, wherein the second partition member has an acute-angled shape at a tip portion facing the developer carrier. The developing device according to claim 1, 2, or 3,
2. A developing device according to claim 1, wherein the closest distance between the developer carrying member and the tip of the second partition member is larger than the closest distance between the developer carrying member and the supply chamber developer conveying member. The developing device according to claim 1, 2, 3 or 4,
The developing device according to claim 1, wherein the second partition member is an even number. The developing device according to claim 1, 2, 3, 4 or 5.
The developing device, wherein the second partition member is provided so as to be symmetric with respect to an opening provided in an axially central portion of the supply chamber developer conveying member. The developing device according to claim 1, 2, 3, 4, 5, or 6.
The developing device according to claim 1, wherein a rotation direction of the supply chamber developer conveying member is a downward direction at a position facing the developer carrying member. The developing device according to claim 1, 2, 3, 4, 5, 6, or 7.
A developing device comprising a plurality of the developer containing members in the storage chamber. The developing device according to claim 1, 2, 3, 4, 5, 6, 7 or 8.
The developing device, wherein the supply chamber developer conveying member includes a paddle in the vicinity of the opening. The developing device according to claim 1, 2, 3, 4, 5, 6, 7, 8, or 9.
The supply chamber developer transport member includes a reverse transport unit that transports the developer in a direction opposite to the developer transport direction at an axial end or in the vicinity of the second partition member. . From a latent image carrier that carries a latent image, a charging unit that uniformly charges the latent image carrier, a developing unit that develops the latent image on the latent image carrier, and a cleaning unit that cleans the latent image carrier In a process cartridge that integrally supports at least one selected means and is detachable from the image forming apparatus main body,
11. A process cartridge comprising the developing device according to claim 1, 2, 3, 4, 5, 6, 7, 8, 9 or 10 as the developing means. In an image forming apparatus comprising a latent image carrier that carries a latent image and a developing unit that develops the latent image,
An image forming apparatus using the developing device according to claim 1, 2, 3, 4, 5, 6, 7, 8, 9 or 10 as the developing means.

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