JP2013068769A - Developing device and image forming apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a developing device and an image forming apparatus in which the charge amount of a developer is large.SOLUTION: A developing device 14Y comprises: a rotating conveying body 141 for conveying a developer to the surface of a body 11Y to be developed by rotating while maintaining a developer disposed adjacent to the body to be developed on the surface; a housing CA of the rotating conveying body 141 which supports the rotating conveying body 141 in a state where a region facing the body 11Y to be developed is exposed and has a storage part 140 for storing a developer supplied to the rotating conveying body 141; a developer supply part 147 for supplying the developer, which spreads from the storage part to the rotating conveying body and is stored in the storage part, to the rotating conveying body; and a charging part 148 for charging a developer disposed on the developer supply part 147.

Description

  The present invention relates to a developing device and an image forming apparatus.

  For example, Patent Document 1 discloses an electrostatic developing device that develops an electrostatic image. The electrostatic developing device includes a non-magnetic sleeve and a plate-like vibrating guide member that guides the developer toward the non-magnetic sleeve. The vibrating guide member crushes the aggregation of developer particles.

JP 54-92237 A

  An object of the present invention is to provide a developing device and an image forming apparatus having a large charge amount of a developer.

The developing device according to claim 1 is:
A rotating and conveying body that is arranged adjacent to the developing object and conveys the developer to the surface of the developing object by rotating while holding the developer on the surface;
A housing having a housing portion for supporting the rotating transport body in a state where the region facing the development target of the rotating transport body is exposed, and housing a developer supplied to the rotating transport body;
A developer supply section that spreads from the storage section toward the rotary transport body, and that supplies the developer stored in the storage section on the rotary transport body;
And a charging unit disposed on the developer supply unit in the housing for charging the developer.

In the developing device according to claim 2, the charging unit includes:
An orbiting moving body that orbits, and
And a plurality of first protrusions that are erected on the orbiting moving body and scrape the developer on the developer supply section by the orbiting movement of the orbiting moving body.

In the developing device according to claim 3, the developer supply unit includes:
A plate-like portion that is inclined in a downward direction toward the rotary carrier, on which the developer is placed;
A vibration device that vibrates the plate-like portion and causes the developer on the plate-like portion to flow;
It has a plurality of second projections erected on the plate-like portion.

An image forming apparatus according to claim 4
A development target on which an electrostatic latent image is formed on the surface and the electrostatic latent image is developed with a developer;
A developing device for developing the object to be developed with a developer;
The developing device is
A rotating conveyance body that is arranged adjacent to the object to be developed and conveys the developer to the surface of the object to be developed by rotating while holding the developer on the surface;
A housing having a housing portion for supporting the rotating transport body in a state where the region facing the development target of the rotating transport body is exposed, and storing a developer supplied to the rotating transport body;
A developer supply section that spreads from the storage section toward the rotary transport body, and that supplies the developer stored in the storage section on the rotary transport body;
And a charging unit disposed on the developer supply unit in the housing for charging the developer.

  The developing device according to the first aspect and the image forming apparatus according to the fourth aspect have a larger charge amount of the developer than the case where the present configuration is not provided.

  In the developing device according to the second aspect, the charge amount of the developer is larger than that in the case where there is no protrusion standing on the orbiting moving body.

  In the developing device according to the third aspect, the charge amount of the developer is larger than the case where the plurality of protrusions standing on the plate-like portion are not provided.

1 is a configuration diagram illustrating an embodiment of an image forming apparatus of the present invention. FIG. 2 is a plan view of the developing device shown in FIG. 1. It is a longitudinal cross-sectional view of a developing device. FIG. 4 is a sectional view taken along line 4-4 of the developing device shown in FIG. It is a figure which shows the stirring member with which the image development apparatus of 2nd Embodiment was equipped. It is a figure which shows schematic structure of the stirring member vicinity of the developing device of 3rd Embodiment.

  Embodiments of the present invention will be described below with reference to the drawings.

  FIG. 1 is a configuration diagram showing an embodiment of an image forming apparatus of the present invention.

  The image forming apparatus 1 shown in FIG. 1 has image forming units 10Y, 10M, 10C, and 10K arranged in parallel for each color of yellow (Y), magenta (M), cyan (C), and black (K). The tandem type color printer is capable of printing a single color image and printing a full color image composed of four color toner images. The image forming apparatus 1 includes toner cartridges 18Y, 18M, 18C, and 18K that store toners of CMYK colors.

  Since the four image forming units 10Y, 10M, 10C, and 10K have substantially the same configuration, the image forming unit 10Y corresponding to yellow will be described as a representative example. The image forming unit 10Y includes a photoreceptor 11Y, a charger 12Y, an exposure device 13Y, a developing device 14Y, a primary transfer device 15Y, and a photoreceptor cleaner 16Y.

  The photoconductor 11Y has a photoconductor layer on a cylindrical substrate, holds an image formed on the surface, and rotates in the direction of arrow A around the axis of the cylinder. The charger 12Y, the exposure device 13Y, the developing device 14Y, the primary transfer device 15Y, and the photoconductor cleaner 16Y are sequentially arranged around the photoconductor 11Y. The photoreceptor 11Y corresponds to an example of a member to be developed according to the present invention.

  The charger 12Y charges the surface of the photoreceptor 11Y. The charger 12Y is a charging roll that contacts the surface of the photoreceptor 11Y. A voltage having the same polarity as that of the toner in the developing device 14Y is applied to the charging roll, and the surface of the contacted photoreceptor 11Y is charged. As the charger 12Y, a corona discharger that is not in contact with the photoreceptor 11Y can be employed in addition to the charging roll.

  The exposure device 13Y includes a light emitter that emits laser light based on an image signal supplied from the outside of the image forming apparatus 1, and a rotary polygon mirror that scans the photoconductor 11Y with the laser light. By irradiating 11Y with laser light, the surface of the photoreceptor 11Y is exposed.

  The developing device 14Y develops the surface of the photoreceptor 11Y using a two-component developer composed of toner and a magnetic carrier. Toner is supplied from the toner cartridge 18Y to the developing device 14Y. The toner is mixed with the magnetic carrier in the developing device 14Y. The magnetic carrier is obtained, for example, by applying a resin coating to the surface of iron powder. The toner particles have, for example, a binder resin, a colorant, and a release agent. The developing device 14Y charges the toner and the magnetic carrier by stirring the developer in which the magnetic carrier particles and the toner particles are mixed, and develops the surface of the photoreceptor 11Y with the charged toner.

  The primary transfer unit 15Y is a roll facing the photoconductor 11Y with the intermediate transfer belt 30 interposed therebetween. The primary transfer unit 15Y has a conductive elastic layer on the surface, and a toner image on the photoreceptor 11Y is statically applied to the intermediate transfer belt 30 by applying a voltage having a polarity opposite to the charging polarity of the toner. Electrosuction. The photoconductor cleaner 16Y has a cleaning blade that contacts the surface of the photoconductor 11Y, and cleans the surface of the photoconductor 11Y after transfer.

  The image forming apparatus 1 also includes an intermediate transfer belt 30, a fixing device 60, a paper transport unit 80, and a control unit 1 </ b> A that controls each part of the image forming apparatus 1. The intermediate transfer belt 30 is an endless belt made of a resin material containing an antistatic agent. The intermediate transfer belt 30 is stretched around belt support rolls 31 to 35 and circulates in the direction indicated by the arrow B passing through the image forming units 10Y, 10M, 10C, and 10K and the secondary transfer unit 50. The toner images of the respective colors are transferred to the intermediate transfer belt 30 from the image forming units 10Y, 10M, 10C, and 10K. The intermediate transfer belt 30 moves while holding the toner images of these colors.

  The secondary transfer device 50 is a roll that rotates with the intermediate transfer belt 30 and the paper sandwiched between the secondary transfer unit 50 and the backup roll 34 that is one of the belt support rolls 31 to 35. The secondary transfer unit 50 has a conductive elastic layer on the surface, and a voltage having a polarity opposite to the charging polarity of the toner is applied to electrostatically attract the toner image on the intermediate transfer belt 30 to the sheet. . The belt cleaner 70 scrapes off the toner on the intermediate transfer belt 30 by bringing a blade into contact with the intermediate transfer belt 30.

  The fixing device 60 fixes the toner on the paper. The fixing device 60 includes a heating roll 61 and a pressure roll 62, and the heating roll 61 includes a heater. The heating roll 61 and the pressure roll 62 fix the toner image on the paper by passing the paper on which the toner image before fixing is formed sandwiched therebetween.

  The paper transport unit 80 includes a take-out roll 81 that takes out the paper stored in the paper container T, a scooping roll 82 that picks up the picked-up paper, a transport roll 83 that transports the paper, and a resist that transports the paper to the secondary transfer device 50. And a discharge roll 86 for discharging the paper to the outside. The paper transport unit 80 transports along a paper transport path R that passes through the secondary transfer device 50 and the fixing device 60.

  The basic operation of the image forming apparatus 1 shown in FIG. 1 will be described. In the yellow image forming unit 10Y, the photoreceptor 11Y is rotationally driven in the direction of arrow A, and a charge is applied to the surface of the photoreceptor 11Y by the charger 12Y. . The exposure device 13Y irradiates the photoconductor 11Y with exposure light corresponding to data corresponding to each color in the image signal. The exposure device 13Y forms an electrostatic latent image on the surface of the photoconductor 11Y by irradiating the surface of the photoconductor 11Y with exposure light based on an image signal corresponding to yellow among image signals supplied from the outside. . Yellow toner is supplied from the toner cartridge 18Y to the developing device 14Y. The developing device 14Y forms a toner image by developing the electrostatic latent image with toner. The photoconductor 11Y rotates while holding the yellow toner image formed on the surface. The toner image formed on the surface of the photoreceptor 11Y is transferred to the intermediate transfer belt 30 by the primary transfer unit 15Y. After transfer, the toner remaining on the photoreceptor 11Y is collected and removed by the photoreceptor cleaner 16Y.

  The intermediate transfer belt 30 is looped around the support rolls 31 to 35 and moved in the direction of arrow B. The image forming units 10M, 10C, and 10K corresponding to colors other than yellow form toner images corresponding to the respective colors in the same manner as the image forming unit 10Y, and are transferred to the intermediate transfer belt 30 by the image forming unit 10Y. The toner images of the respective colors are transferred so as to overlap the toner images.

  The paper P is taken out from the paper container T by the take-out roll 81. The paper P is transported along the paper transport path R in the direction of arrow C toward the secondary transfer device 50 by the transport roll 83 and the registration roll 84. The registration roll 84 sends the paper P to the secondary transfer device 50 based on the timing at which the toner image is transferred onto the intermediate transfer belt 30. The secondary transfer device 50 transfers the toner image on the intermediate transfer belt 30 to the paper P by applying a transfer potential between the intermediate transfer belt 30 and the paper P. The sheet P on which the toner image is transferred is conveyed from the secondary transfer unit 50 to the fixing device 60, and the toner image transferred onto the sheet is fixed. In this way, an image is formed on the paper. The sheet on which the image is formed is discharged to the outside of the image forming apparatus 1 by the discharge roll 86. The toner remaining on the intermediate transfer belt 30 after the transfer by the secondary transfer device 50 is removed by the belt cleaner 70.

[Developer]
FIG. 2 is a plan view of the developing device shown in FIG. FIG. 3 is a longitudinal sectional view of the developing device. 4 is a cross-sectional view taken along line 4-4 of the developing device shown in FIG. Although the developing device 14Y for yellow is shown in the drawing, the developing devices 14M to 14K for other colors also have the same structure as the developing device 14Y.

  The developing device 14Y includes a casing CA, a developing roll 141, a first transport member 142, a second transport member 143, a third transport member 144, a developer supply unit 147, and a stirring member 148. FIG. 2 shows a state in which the stirring member 148 is further removed except for the cover of the casing CA.

  The developing roll 141, the first conveying member 142, the second conveying member 143, the third conveying member 144, the developer supply unit 147, and the stirring member 148 are provided in the casing CA. The casing CA supports the developing roll 141 in a state where the area facing the photoconductor 11Y is exposed. Further, the housing CA is provided with a developer container 140 for containing the developer. The developer container 140 includes a first storage chamber 140a and a second storage chamber by a first partition wall 1401 extending vertically and a second partition wall 1402 extending horizontally in one space partitioned by the partition wall 1401. 140b and the third storage chamber 140c. The first storage chamber 140a and the third storage chamber 140c are provided on the developing roll 141 side, and the first storage chamber 140a is disposed above the third storage chamber 140c. The second storage chamber 140b is provided at a position farther from the developing roll 141 than the first storage chamber 140a and the third storage chamber 140c. The bottom of the second storage chamber 140b is inclined with respect to the horizontal direction, one end is at the height of the first storage chamber 140a, and the other end is at the height of the third storage chamber 140c.

  The first transport member 142 is disposed in the first storage chamber 140a, the second transport member 143 is disposed in the second storage chamber 140b, and the third transport member 144 is disposed in the third storage chamber 140c. The first transport member 142 and the third transport member 144 extend in the front-rear direction DE in the image forming apparatus 1, that is, in the extending direction in which the developing roll 141 extends. Further, the second transport member 143 extends in a direction inclined upward and downward with respect to the front-rear direction DE. The three transport members 142, 143, and 144 include rotating shafts 1421, 1431, and 1441 and spiral spiral blades 1422, 1432, and 1442 provided around the rotating shafts 1421, 1431, and 1441, respectively. Each of the conveying members 142, 143, and 144 is supported by the developer container 140, that is, the casing CA, so that both end portions of the rotating shafts 1421, 1431, and 1441 are rotatable. The rotating shafts 1421, 1431, 1441 are connected to a gear 146 that transmits a driving force from a motor (not shown). The developing roll 141 and the three transport members 142, 143, and 144 are rotated by driving of a motor (not shown).

  The first transport member 142 transports the developer in the first storage chamber 140a in the first transport direction D by rotating around the axis of the rotation shaft 1421. Further, the third conveyance member 144 disposed below the first conveyance member 142 conveys the developer in the third storage chamber 140c in the first conveyance direction D by rotating around the rotation axis 1441. The second transport member 143 rotates around the axis of the rotation shaft 1431, thereby causing the developer in the second storage chamber 140 b to tilt upward with respect to the direction E opposite to the first transport direction D. Transport to E '. That is, the developer is transported obliquely upward in the second storage chamber 140b.

  The developer in the developer container 140 passes through connection ports 1401a and 1401b provided at the ends of the partition walls 1401 and 1402, respectively. The developer is transported in the first transport direction D in the lower third storage chamber 140c, and transported in the second transport direction E ′ in the second storage chamber 140b through the connection port 1401a and facing obliquely upward. Furthermore, the inside of the upper first storage chamber 140a is transported in the first transport direction D via the communication port 1401b. The developer in the first storage chamber 140a is supplied to the development roll 141 by the developer supply unit 147, and returns to the third storage chamber 140c via the development roll 141. In this way, the developer circulates. In this circulation, the second storage chamber 140b and the second transport member 143 function as means for transporting the developer above the developer supply unit 147 and the development roll 141. The developer supply unit 147 will be described later. As a means for conveying the developer upward, for example, a mechanism for conveying the developer while attracting the developer by moving a magnet can be employed in addition to the rotating conveyance member 143 having a spiral blade.

  The developing roll 141 conveys the developer to the surface of the photoreceptor 11Y (see FIG. 1). The developing roll 141 has a cylindrical shape, and a magnet 1411 is disposed inside the developing roll 141. The magnet 1411 is fixed to the developer container 140, and has a pickup magnetic pole for attracting the magnetic carrier to which the toner particles adhere to the developing roll 141, and a magnetic pole for causing the developer to stand up in the development area. The developing roll 141 corresponds to an example of the rotating transport body referred to in the present invention.

  The developing roll 141 conveys the developer to the surface of the photoreceptor 11Y by rotating while holding the developer on the surface. A direction in which the developer is transported toward the surface of the photoconductor 11Y is defined as a transport direction F. The toner contained in the developer conveyed to the surface of the photoconductor 11Y adheres to the portion of the surface of the photoconductor 11Y that has been irradiated with light. The toner or magnetic carrier that has not adhered to the photoreceptor 11Y is held by the developing roll 141 and returns to the third storage chamber 140c. In the second storage chamber 140b of the developer storage unit 140, a new amount of toner corresponding to the amount of toner consumed in the development is supplied from the toner cartridge 18Y (see FIG. 1).

  The developer supply unit 147 extends from the first storage chamber 140a toward the development roll 141, and supplies the developer from the first storage chamber 140a to the development roll 141. The developer supply unit 147 includes a plate-like portion 1471, a plurality of braking protrusions 1472, and a vibration device 1473. The plate-like portion 1471 is inclined downward toward the developing roll 141. The plate-like portion 1471 is supported by the casing CA so as to be rotatable about a portion close to the developing roll 141. The brake protrusion 1472 is a rod-like protrusion provided upright on the plate-like portion 1471. The braking protrusions 1472 are two-dimensionally arranged on the plate-like portion 1471 with a space therebetween. The plate-like portion 1471 and the braking protrusion 1472 are made of a resin material. The vibration device 1473 is disposed below the plate-like portion 1471, is supported by the casing CA, and is coupled to the plate-like portion 1471. The vibration device 1473 receives the control of the control unit 1A (see FIG. 1) and vibrates the plate-like portion 1471. Developer is supplied to the plate-like portion 1471 from the first storage chamber 140a. When the plate-like portion 1471 is vibrated by the vibration device 1473, the developer placed on the plate-like portion 1471 flows from the upper portion to the lower portion of the plate-like portion 1471 so as to sew between the braking protrusions 1472, and the developing roll 141 To be supplied. The amount of the developer supplied to the developing roll 141 is controlled by the magnitude and frequency of vibration of the plate-like portion 1471 by the vibration device 1473.

  The stirring member 148 is disposed above the developer supply unit 147. The stirring member 148 includes a rotating roll 1481 that rotates, and a plurality of stirring protrusions 1482 that are erected on the rotating roll 1481. The rotating roll 1481 is a cylindrical member, and is rotated by being driven by a motor (not shown). The stirring protrusions 1482 are rod-like members that protrude radially from the peripheral surface of the rotary roll 1481, and are arranged on the peripheral surface of the rotary roll 1481 at intervals. The stirring member 148 is disposed at such a position that the stirring protrusion 1482 is close enough not to contact the plate-like portion 1471. More specifically, the stirring protrusion 1482 is disposed at a position where the tip portion enters the developer placed in a layer on the plate-like portion 1471 in a state where it is at least closest to the plate-like portion 1471. Further, the stirring protrusion 1482 is disposed at a position that avoids interference with the braking protrusion 1472 erected on the plate-like portion 1471 when the stirring member 148 rotates. The rotating roll 1481 is disposed at a position where the peripheral surface does not contact the developer placed on the plate-like portion 1471. The rotating roll 1481 rotates in the arrow F direction in which the peripheral surface facing the plate-like portion 1471 is directed to the developing roll 141. More specifically, the rotating roll 1481 rotates so that the stirring protrusion 1482 moves faster than the flow rate of the developer placed on the plate-like portion 1471. The rotating roll 1481 rotates with the stirring protrusion 1482 so as to scrape the developer placed on the plate-like portion 1471.

  The stirring member 148 corresponds to an example of the charging unit referred to in the present invention. Further, the rotating roll 1481 corresponds to an example of the orbiting moving body according to the present invention, and the stirring protrusion 1482 corresponds to an example of the first protrusion according to the present invention.

  The developer placed on the plate-like portion 1471 is stirred and stirred by the stirring protrusion 1482 of the rotary roll 1481. The toner particles and the magnetic carrier contained in the developer are charged by being stirred. More specifically, the toner particles of the developer and the magnetic carrier are charged by being agitated even when transported by the rotating first transport member 142 and second transport member 143. In this embodiment, the charge amount of the developer placed on the plate-like portion 1471 increases by being stirred and stirred by the stirring protrusion 1482 of the rotary roll 1481. For this reason, in the present embodiment, for example, a charge amount required for development can be obtained even in a configuration in which a plate-like layer regulating member that passes through and charges the developer is not disposed above the developing roll. When the thickness of the developer is not regulated by the layer regulating member, the developer aggregation upstream of the layer regulating member and the deterioration of the developer due to the aggregation pressure can be suppressed. Note that the amount of the developer on the developing roll is controlled by the vibration of the plate-like portion 1471.

  Further, the developer flowing on the plate-like portion 1471 is prevented from moving by the braking protrusion 1472 erected on the plate-like portion 1471. It moves by the vibration of the plate-like portion 1471 and is moved between the developer particles that are scratched and moved by the stirring protrusion 1482 of the rotating roll 1481 and the developer particles that are prevented from moving by the braking protrusion 1472. A speed difference occurs. Therefore, the developer agitation amount increases and the toner charge amount increases.

[Second Embodiment]
Next, a second embodiment of the present invention will be described. In the following description of the second embodiment, the same reference numerals are given to the same elements as those in the embodiments described so far, and differences from the above-described embodiments will be described.

  FIG. 5 is a diagram illustrating a stirring member provided in the developing device of the second embodiment.

  In the stirring member 248 of the present embodiment, the stirring protrusion 2482 provided upright on the rotary roll 2481 is not a rod shape but a plate shape. The stirring protrusion 2482 extends in the extending direction of the rotating roll 2481, that is, the front-rear direction DE. In addition, the stirring protrusions 2482 are alternately arranged with different lengths in the front-rear direction DE. The plate-like stirring protrusion 2482 increases the amount of stirring accompanying the rotation of the stirring member 248 as compared to the rod-like case.

[Third Embodiment]
Next, a third embodiment of the present invention will be described. In the following description of the third embodiment, the same reference numerals are given to the same elements as those in the embodiments described so far, and differences from the above-described embodiments will be described.

  FIG. 5 is a diagram illustrating a schematic configuration in the vicinity of the stirring member of the developing device according to the third embodiment.

  The agitating member 348 of the developing device 34Y shown in FIG. 5 includes a pair of support rolls 3481a and 3481b and an endless belt 3482 spanned between the support rolls 3481a and 3481b. On the outer surface of the belt 3482, a plurality of stirring protrusions 3383 are erected. The belt 3482 corresponds to an example of the orbiting moving body according to the present invention, and the stirring protrusion 3383 corresponds to an example of the first protrusion according to the present invention.

  When the support roll 3481a rotates by being driven by a motor (not shown), the belt 3482 rotates. As a result, the stirring protrusion 3483 erected on the belt 3482 moves so as to scrape the developer on the developer supply unit 147. Therefore, the developer is agitated and the charge amount increases.

  In the embodiment described above, as an example of the orbiting moving body referred to in the present invention, a rotating roll 1481 in which a surface facing the plate-like portion 1471 rotates in a direction toward the developing roll 141 is shown. However, the present invention is not limited to this, and the orbiting moving body may rotate in a direction opposite to the rotating roll 1481, for example.

  In the above-described embodiment, as an example of the charging unit referred to in the present invention, a rotating roll or a belt having standing stirring protrusions is shown. However, the charging unit referred to in the present invention is not limited to this. For example, the developer may be agitated by vibrating the protrusions, and the developer flows on the developer supply part while the protrusions are stationary. Stirring may be performed by preventing the above. The charging unit may charge the developer by means such as discharge.

  In the embodiment described above, a tandem color printer is shown as an example of the image forming apparatus according to the present invention. However, the image forming apparatus referred to in the present invention is not limited to this, and may be a monochrome printer that does not have an intermediate transfer belt, for example.

  In the embodiment described above, a printer is shown as an example of the image forming apparatus according to the present invention. However, the image forming apparatus according to the present invention is not limited to a printer, and may be, for example, a copying machine or a facsimile that forms an image based on data read by the image reading apparatus.

DESCRIPTION OF SYMBOLS 1 Image forming apparatus 11Y Photoconductor 14Y, 34Y Developing apparatus 140 Developer container 141 Developing roll 147 Developer supply part 1471 Plate-like part 1472 Braking protrusion 1473 Vibration apparatus 148,248,348 Stirring member 1482,2481 Rotating roll 1482,2482 , 3482 Stirring protrusion 3482 Belt CA housing

Claims (4)

A rotating conveyance body that is arranged adjacent to the developing object and rotates while holding the developer on the surface to convey the developer to the surface of the developing object;
A housing having a housing portion for supporting the rotating transport body in a state where the region facing the development target of the rotating transport body is exposed, and storing a developer supplied to the rotating transport body;
A developer supply section that spreads from the storage section toward the rotary transport body and that supplies the developer stored in the storage section to the rotary transport body;
A developing device comprising: a charging unit disposed on the developer supply unit in the housing for charging the developer. The charging unit is
An orbiting moving body that orbits, and
2. The development according to claim 1, further comprising a plurality of first protrusions that are erected on the orbiting moving body and scrape the developer on the developer supply unit by the orbiting movement of the orbiting moving body. apparatus. The developer supply unit
A plate-like portion that is inclined in a downward direction toward the rotary carrier, on which the developer is placed;
A vibrating device that vibrates the plate-like portion to flow the developer on the plate-like portion;
The developing device according to claim 1, further comprising a plurality of second protrusions erected on the plate-like portion. A developing object on which an electrostatic latent image is formed and the electrostatic latent image is developed with a developer;
A developing device for developing the object to be developed with a developer;
The developing device is
A rotating and conveying body that is arranged adjacent to the object to be developed and conveys the developer to the surface of the object to be developed by rotating while holding the developer on the surface;
A housing having a housing portion for supporting the rotating transport body in a state where the region facing the development target of the rotating transport body is exposed, and storing a developer supplied to the rotating transport body;
A developer supply section that spreads from the storage section toward the rotary transport body and that supplies the developer stored in the storage section to the rotary transport body;
An image forming apparatus comprising: a charging unit that is disposed on the developer supply unit in the housing and charges the developer.

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