JP3492130B2 - Developing device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [0001] BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a printer and a copying machine.
Image information using a developer in a printer, facsimile, etc.
Function to detect the presence or absence or remaining amount of developer
Electrophotographic image forming apparatus havingInvolved, especially,
Development device that can be attached to and detached from the main body of
Things. [0002]In the following descriptionWith process cartridge
Are charging means, or cleaning means and developing means, and
This cartridge is integrated with the electrophotographic photosensitive member,
Make the cartridge detachable from the main body of the image forming apparatus
Things. And less charging means and cleaning means
And developing means and electrophotographic photoreceptor integrally
Made into a cartridge and made removable to the image forming apparatus main body
Things. Further, at least a developing means and an electrophotographic photosensitive
The body is integrated into a cartridge to form the image forming apparatus body
It means something that can be removed. [0003] SUMMARY OF THE INVENTION The present invention relates to a conventional
It is a further development of technology. The present invention relates to the provision of a developing device,
Have a target. A first object of the present application is to move a stirring means.
Cleans a larger area of toner even when the movement is small
To achieve both toner agitation and toner remaining amount detection.
is there. [0006] A second object of the present application is to reduce the cost.
To achieve the first object. [0007] A third object of the present invention is to provide the above-mentioned first object.
Target and more reliable detection of remaining toner
To do. [0008] A fourth object of the present invention is to provide a toner remaining amount.
To be properly detected in accordance with the characteristics of the toner.
Things. A fifth object of the present application is to reduce the cost.
To achieve the first to third objects. [0010] [0011] [0012] [0013] [0014] [0015] [0016] [0017] [0018] [0019] [0020] [0021] [0022] [0023] [0024] [0025] [0026] [0027] [0028] [0029] [0030] [0031] [0032] [0033] [0034] [0035][Means for Solving the Problems] No.1Invention of
Is a developing device detachable from the image forming apparatus main body,image
Develop the latent image formed on the carrier with tonerdeveloping
Components,Remaining amount of toner provided in the image forming apparatus main body
Supply to the developing member located within the detection range of the sensor
Containing toner forHaving a toner container,
The toner storage container isOf the toner remaining amount sensorDetection range
First cleaning hand that can reciprocate to clean toner inside
And a driving force is obtained by reciprocating the step and the first cleaning means.
And second cleaning means for cleaning the toner by
Sweeping meansThe toner remaining amount sensorPart of the detection range of
Reciprocating along the bottom wall of the toner container,
Cleaning meansThe toner remaining amount sensorOut of the detection range of
Rotate backward, the rotation center of the second cleaning means is the first cleaning
From the end of the cleaning area of the means to the bottom wall of the toner container
Developing device characterized by being located substantially perpendicular to
Place. [0036] [0037] 2. Description of the Related Art Conventionally, in electrophotographic image forming apparatuses and the like,
As a toner remaining amount detection device, a toner collection
Apply voltage to the inside or outside of the container according to the amount of toner.
Arrange the generated elements to determine the amount of toner in the toner container.
Or, a toner remaining amount detection device that detects the presence or absence
I have. In such an apparatus, the toner storage capacity
The toner sensor is high when there is sufficient toner in the container
Outputs a level signal, indicating that toner in the toner container is low.
When it runs out, the toner sensor outputs a low-level signal
I do. Thus, the change in the output of the toner sensor
Therefore, the presence or absence of the developer is detected. Also, a cleaning blade attached to the stirring means
The toner sensor
-It is configured to scrape off the toner on the detection surface.
As a result, even though the toner container is empty,
The presence of toner is determined by the toner attached on the toner detection surface.
It is prevented from being judged. [0040] BRIEF DESCRIPTION OF THE DRAWINGS FIG.
This will be described with reference to FIG. Embodiment Mode 1 Facsimile machine as a first embodiment according to the present invention
An example applied to the method will be specifically described with reference to the drawings. This
Here, the description will be made in the following order. 1. Overall configuration of facsimile machine 2. Configuration of reader for reading information 3. Configuration of image forming apparatus for recording received information 4. Process cartridge used in the image forming apparatus
Configuration of each part 5.Detecting toner remainingMagnetic bridge as detection means
Disensor (Toner level sensor)Description 6. Remaining amount detection by detection means provided outside the toner container
Configuration of means 7. Structure of stirring means for stirring toner in toner container 8. How to determine the remaining amount of toner << Overall configuration of facsimile machine >> FIG. 1 shows an image in which a process cartridge according to the present invention is mounted.
FIG. 2 is a configuration explanatory view of a facsimile apparatus having an image forming apparatus.
FIG. 2 is a perspective view of the appearance. This facsimile apparatus is as shown in FIG.
A document reading device A above, and an image forming device
Device B is arranged. And read by reader A
If the information is in the facsimile mode, the fax
Send to the millimeter device, and in the copy mode, the self image
Recording is performed by the forming apparatus B. The image forming apparatus B is configured as shown in FIG.
To an optical image based on the image information from the optical unit 1
A toner image is formed on a photosensitive drum 7 serving as an image carrier.
Then, the recording paper 2 is transported in synchronization with the formation of the toner image.
Transported by step 3 and with the process cartridge C
In the image forming section formed into a cartridge
The toner image formed on the drum 7 is recorded by the transfer unit 4.
The recording paper 2 is transferred to the recording paper 2, and the recording paper 2 is conveyed to the fixing means 5,
The transfer toner image is fixed and discharged to the discharge tray 6. Process Cart Constituting the Image Forming Unit
The ridge C rotates the photosensitive drum 7 as shown in FIG.
Then, the surface is uniformly charged by the charging means 8,
The light image from the optical system 1 is transferred to the photosensitive drum 7 through the exposure unit 9.
To form a latent image, and the developing means 10 responds to the latent image.
The toner image is visualized by forming the same toner image. Soshi
Transfer the toner image onto the recording paper 2 by the transfer means 4
Is left on the photosensitive drum 7 by the cleaning means 11.
The remaining toner is removed. The photosensitive drum 7 and the like
Each component is an upper frame body 12a which is a first frame made of resin,
C formed by connecting the lower frame body 12b as the second frame.
It is housed in the housing 12 and made into a cartridge.
You. Toner storage in the process cartridge C
A stirring means for stirring the toner is provided in the container 10a.
And the toner in the toner container 10a
-A magnetic bridge sensor 25 is installed to detect the remaining amount.
There is. {Reading Device} The document reading device A reads the document 13
To read the information written on the original 13
You. The configuration is, as shown in FIG.
The original 13 stacked on top is pressed against the preliminary conveyance pressing piece 14b1.
With the preliminary transport roller 14b2 and the reverse rotation roller 14c
The sheet is separated one by one by the separation roller 14d which has been pressed, and the pressing means
14e presses the original 13 against the contact type sensor of the reading means 15
After reading the information of the original 13 while keeping the
The document 13 is transferred to the document discharge tray 14 by a discharge roller 14f.
g. The reading means 15 is an LED as a light source.
15a irradiates light to the information recording surface of the document 13 and reflects the light.
The light is transmitted to the photoelectric conversion element 15 through the short focus imaging lens 15b.
The information is read by forming an image on c.
When in facsimile mode via the control means described
To the machine, and in the copy mode, its own image forming device
Send to B. The document 13 is transported to the document table 14a.
Can be slid in the direction perpendicular to the direction (width direction of the document 13)
A slider 14h is provided, and the slider 14h
13 and slide it to the width of the original
Align both sides of document 13 loaded on 14a
Can be. {Image Forming Apparatus} Next, an image is formed in accordance with a recording signal.
Regarding the configuration of each part of the image forming apparatus B that forms an image,
Optical means, recording paper transport means, transfer means, fixing means
The steps and the process cartridge mounting means will be described in this order. (Optical Means) The optical means 1 is provided by an external device or the like.
By irradiating light based on the read image information
This is for irradiating the photosensitive drum 7 with a light image, and is shown in FIG.
As shown in FIG.
b, polygon mirror 1c, scanner motor 1d, imaging
The lens 1e is housed. Then, for example, from another facsimile machine
When an image signal is given, the laser diode 1b
Light is emitted according to the image signal, and an image is displayed on the polygon mirror 1c.
Irradiate as light. This polygon mirror 1c is a scanner
-The polygon mirror 1 is rotated at a high speed by the motor 1d.
The image light reflected by the imaging lens 1e and the reflection mirror 1
f, and irradiates the rotating photosensitive drum 7 with the photosensitive drum 7
The surface of the drum 7 is selectively exposed and a latent image corresponding to image information is exposed.
Form an image. (Recording paper transporting means) Next, the recording paper 2 is transported.
Conveying means 3 for disposing at a position below the image forming apparatus B.
And is attached so that it can be pulled out from one end of the paper feeding unit D.
One top sheet of recording paper 2 loaded in the feed cassette 3a
And a separation claw 3a1 provided at the corner of the leading end of the recording paper 2 and a circle.
With the feed roller 3b having a partially cut-out shape
Separated sheets are fed one by one and fed to the cassette transport roller pair 3c.
Therefore, it is sent to the conveying roller pair 3d, and the conveying roller pair 3d
The recording paper 2 is transferred to the image transfer unit so that the recording paper 2 is synchronized with the image forming operation.
Transport to Then, the recording paper 2 after the image transfer is transferred to a guide plate.
3e, the recording paper 2 is conveyed to the fixing means 5 and
The sheet is discharged to the discharge tray 6 by the discharge roller pair 3f. (Transfer Means) The transfer means 4 is used in the image forming section.
Transfers the toner image formed on the optical drum 7 to the recording paper 2
The transfer means 4 of the present embodiment is shown in FIG.
As described above, the transfer roller 4 is used. The transfer ro
The roller 4 is mounted on the process cartridge mounted on the apparatus body 16.
The photosensitive drum 7 is pressed against the photosensitive drum 7 and the rotation of the photosensitive drum 7 is stopped.
It is configured to rotate by being driven by rolling.
That is, the image is transferred to the photosensitive drum 7 of the process cartridge C.
The recording paper 2 is pressed by the roller 4 and further transferred to the transfer roller.
4 is an electric charge having a polarity opposite to that of the toner image formed on the photosensitive drum 7.
By applying pressure, the toner on the photosensitive drum 7 is
Transfer to recording paper 2. (Fixing Means) The fixing means 5 includes the transfer roller
4 to determine the toner image transferred to the recording paper 2 by applying the voltage of 4.
It is what you wear. Its configuration is as shown in FIG.
It has a driving roller 5a that rotates and a heater 5b inside.
And a sheet that is pressed against the drive roller 5a and is driven to rotate.
And a fixing member 5c having a member. That is, image formation
The recording paper 2 on which the toner image has been transferred by the driving roller 5
a when passing between the fixing member 5c and the fixing member 5c.
The pressure is applied by the pressing, and the heat generated by the heater 5b is reduced.
Therefore, heat is applied, and the toner of the recording paper 2 is set on the recording paper 2.
To wear. (Process Cartridge Mounting Means)
A process cartridge C is mounted in the image forming apparatus B.
Cartridge mounting means is provided. Process mosquito
The attachment and detachment of the cartridge C with respect to the apparatus main body 16 is performed by opening and closing the cover.
-17 is opened. That is, as shown in FIG.
The upper part of the apparatus body 16 is opened and closed by a hinge 17a.
A possible opening and closing cover 17 is attached. And the opening
When the closing cover 17 is opened, as shown in FIG.
The cartridge mounting space is provided as
Guide grooves 18 are provided on the left and right wall surfaces of the pace. this
A dowel 12b2 coaxial with the photosensitive drum 7 is provided in the guide groove 18.
Insert the process cartridge C along the
17 to close the process cartridge C.
It is designed to be mounted on the image forming apparatus B. Openable cover 1
7 is closed, a pressing member provided on the lower surface of the opening / closing cover 17
17c is below the housing 12 of the process cartridge C.
The process cartridge C to the predetermined position.
Then, the mounting is completed (see FIG. 4). {Process Cartridge} Next, the image type
Of each part of the process cartridge C mounted on the forming apparatus B
The configuration will be described. This process cartridge C is an image carrier
And at least one process means.
You. Here, as the processing means, for example, the surface of the image carrier is used.
Charging means for charging the surface, forming a toner image on the image carrier
Developing means that cleans the toner remaining on the image carrier surface.
Cleaning means for cleaning. Form of this implementation
The process cartridge C is shown in FIGS. 1, 5 and 6.
As described above, the periphery of the electrophotographic photosensitive drum 7 serving as an image carrier is
Surrounded by charging means 8, exposure unit 9, developing means 10, cleaning
And the housing means 12
Integrated, with shutter member 29 attached
This is configured to be detachable from the apparatus main body 16. Next, the structure of each part of the process cartridge C
To the photosensitive drum, charging means, exposure unit, developer
Step, cleaning means, shutter member, explained in this order
I do. (Photosensitive Drum) Photosensitive drum according to the present embodiment
The body drum 7 is a drum base made of cylindrical aluminum
Is formed by coating an organic photosensitive layer on the outer peripheral surface. This feeling
The photoconductor drum 7 is rotatably mounted on the frame, and the photoconductor drum is mounted.
The flange gear fixed to one end in the longitudinal direction of the
By transmitting the driving force of the driving motor provided on the body side
The photosensitive drum 7 is moved in accordance with the arrow in FIG.
Rotate in the direction. (Charging means) The charging means is the photosensitive drum
7 for uniformly charging the surface of
In the embodiment, the charging roller 8 is rotatably mounted on the frame.
Further, a so-called contact charging method is used. The charging roller 8 is made of gold
A metal roller shaft 8a is provided with a conductive elastic layer.
A high-resistance elastic layer is provided on top, and a protective film is further
I'm sorry. The conductive elastic layer is elastic such as EPDM or NBR
It is composed of a rubber layer in which carbon is dispersed.
It serves to guide the bias voltage supplied to a. Also high
The elastic layer of resistance is made of urethane rubber, etc.
One containing fine powder is given as an example.
The pinhole of the ram 7 and the charging roller with high conductivity face each other.
In this case, the leakage current to the photosensitive drum 7 is limited.
It acts to prevent a sharp drop in the bias voltage. The protective film is
Composed of N-methylmethoxylated nylon, conductive elastic layer
Or the composition of the high-resistance elastic layer touches the photosensitive drum 7
To prevent the surface of the photosensitive drum 7 from being altered
Works. The charging roller 8 is moved to the photosensitive drum 7
, And the charging roller 8 is contacted with a photosensitive member during image formation.
The drum 7 rotates following the rotation of the drum 7, and at this time, the charging roller
8 and a DC voltage and an AC voltage are superimposed and applied.
The surface of the photosensitive drum 7 is uniformly charged. (Exposure Unit) The exposure unit 9
Therefore, an optical system is provided on the surface of the photosensitive drum 7 uniformly charged.
Exposure of the light image irradiated from 1 to the surface of the photosensitive drum 7
For forming an electrostatic latent image on the cartridge
Providing an opening for guiding the light image on the upper surface of the frame.
Thus, the exposure unit 9 is configured. (Developing Means) The developing means 10 is, as shown in FIG.
Toner is stored in the toner storage container 10a
And agitate the toner as described below.
A stirring member is provided so as to be able to reciprocate. And toner collection
A non-rotating magnet 10b is provided inside the opening of the container 10a.
Have a thin toner layer on the surface by rotating
DoAs a developing memberThe developing sleeve 10c is a photosensitive drum
7 are provided at a small interval. Developing sleeve 10c
Is sand blasting the surface of the aluminum cylindrical member.
Conductive paint with a roughened surface and pigment dispersed on it
The surface of the developing sleeve 10c is
When the toner layer is formed on the surface, the toner and the developing sleeve
10c, the electrostatic latent image on the photosensitive drum 7 is
Obtain a triboelectric charge sufficient for development. Also the toner
A developing blade 10d is provided to regulate the layer thickness.
You. The toner container 10a contains toner
There is a stirring member for stirring the
-The stirring configuration will be described later. (Cleaning means) Cleaning means 1
As shown in FIG. 5, the configuration of No. 1 is the surface of the photosensitive drum 7.
And scrapes off the toner remaining on the photosensitive drum 7
Cleaning blade 11a for
Under the blade 11a to scoop out the toner
And weakly contacted the surface of the photosensitive drum 7
Squeeze sheet 11b and the collected waste toner
And a waste toner reservoir 11c. (Shutter Member) The shutter member 29 is a professional
Opening 12 provided in the lower frame 12b of the process cartridge C
b1 is opened and closed, and the process cartridge C is
When mounted on the apparatus body 16, the opening 12b1 is opened.
To expose the photosensitive drum 7 from the opening 12b1 (see FIG. 4).
), And remove the process cartridge C from the apparatus body 16.
When removed, the opening 12b1 is closed and the photosensitive drum 7 is removed.
Cover (see FIG. 3), deterioration due to exposure of the photosensitive drum 7
Is to prevent. << Magnetic Bridge Sensor >> I mentioned earlierToner remaining sensorMagnetic bridge sensor
25 is above the main body portion 25b as shown in FIGS.
And the detection head 25a is mounted in a columnar shape.
Through the input / output signal line 25c.
Exchanging detection signals with the main body
You. The detecting head 25a has a detecting head inside.
The sensing transformer has one
A primary winding and two secondary windings consisting of a reference winding and a sensing winding
The wire consists of a total of three windings. The sensing winding is
On the top side, the reference winding is the detection head 25 with the primary winding interposed.
a. [0069] One of the transmitters provided in the sensor body
When a current having a constant waveform is input to the primary winding,
Electromagnetic induction in two secondary windings consisting of a quasi winding and a sensing winding
As a result, a current having a signal having a certain waveform flows. At this time
The magnitude of the induced current depends on the magnetic permeability of the space. Accordingly
Signal from the transmitter and electromagnetic induction from the sensing winding
The signal of a certain waveform with the current flowing by conduction is
By judging with the comparison circuit provided in the main body,
A certain range (detection range) from the center of the detection transformer
The presence of a magnetic material having a density of That is, detection
There is a difference between when there is a magnetic material in front of the head and when there is no magnetic material
Output is obtained. This sensor also detects the magnetic field to be detected.
Detection transformer to respond to differences in magnetic density etc.
A ferrite screw core is provided movably in the center.
Adjusting the position of this screw core
Therefore, proper detection is possible. {Remaining amount detecting means} The remaining amount detecting means
The remaining amount of toner stored in the toner storage container 10a is
It is detected by the ridge sensor 25,
The configuration will be described with reference to FIGS. In the figure, reference numeral 26 denotes a sensor holder 26,
The main body 16 is rotatably mounted around the rotary shaft 26a.
It is attached. 26b holds the magnetic bridge sensor 25
The sensor box 26c is connected to the rotating shaft 26a.
Provided in the opposite direction to the sensor box 26b
Arm part. On the other hand, a rib 17
b is provided, and when the opening / closing cover 17 is closed, a rib 17b is provided.
Abuts against the arm 26c of the sensor holder 26,
The sensor holder 26 is rotated clockwise in the figure (see FIG.
4). This enables the detection of the magnetic bridge sensor 25
The head 25a detects toner of the process cartridge C.
It contacts the surface 10a4. When the cover 17 is opened,
The rib 17b is separated from the arm 26c, and
The rudder 26 rotates counterclockwise in the figure by its own weight.
(See FIG. 3). With this, the magnetic bridge sensor 25
Separated from the process cartridge C,
In order to move to the retreat position outside the path for attaching and detaching the cartridge C,
When the process cartridge C is attached to and detached from the
The air bridge sensor 25 does not interfere. (Method of Holding Magnetic Bridge Sensor) Magnetic
A resin sensor holder that holds the bridge sensor 25
The configuration of the hopper 26 will be described with reference to FIGS. In the X direction in FIG.
Left of sensor box 26b with square cross section of holder 26
The distance between the right side wall 26f and the magnetic bridge sensor 25
Make the body part 25b slightly larger than the X direction dimension
I have. For this reason, the magnetic bridge sensor 25 has many in the X direction.
It is held with little backlash. In the Y direction in FIG.
On the opposite wall perpendicular to the left and right side walls 26f of the box 26b
The two positioning ribs 26d and the pressing portion 26e provided
The distance between the main body portion 25b of the magnetic bridge sensor 25
It is configured to be substantially the same as or slightly smaller than the dimension in the Y direction.
For this reason, the magnetic bridge sensor 25 detects the elasticity of the pressing portion 26e.
Is held against the positioning rib 26d by the elastic deformation.
And the pressing portion 26e of the magnetic bridge sensor 25
To some extent in the Y direction
Can be The Z direction in FIG. 8 (how to press the sensor)
Direction), the magnetic bridge sensor 25
A pressing spring 27 provided below the ridge sensor 25
Is pressed upward through the pressure piece 28, and the sensor
Magnetic bridge sensors are attached to the three claw portions 26g of the holder 26.
The upper surface of the main body portion 25b of the circuit 25 is held against
ing. The pressing spring 27 is located on the back of the sensor box 26b.
Pressed in the Z direction, attached to the surface with a snap fit
Generate power. The pressure piece 28 is the tip of the pressure spring 27
It is attached with a backlash in the part, and against the pressing spring 27
Can be freely tilted within a predetermined range. With the above configuration, the magnetic
The ridge sensor 25 can move up and down in the Z direction, and
It is held so that it can be freely tilted in the X and Y directions. others
To the toner detection surface 10a4 of the process cartridge C.
On the other hand, the positional accuracy of the inclination of the sensor holder 26 is incorrect.
The magnetic bridge sensor 25
Abuts on toner detection surface 10a4 of process cartridge C
At this time, the detection head 2 of the magnetic bridge sensor 25
5a is equalized with respect to the toner detection surface 10a4,
The entire surface of the detection head 25a is in close contact with the toner detection surface 10a4
I do. That is, in the present embodiment, the detection head 25a is
When the toner detection surface 10a4 comes into contact with the
The end of the detection head 25a first detects the toner.
It comes into contact with the sensing surface 10a4 and is further pressed to
The ridge sensor 25 rotates around the contact position.
The detection head 25a and the toner detection surface 10a4
Rotation stops when worn. Press further to the specified position
As a result, the magnetic bridge sensor 25
25a and the toner detection surface 10a4 while maintaining the close contact.
And presses against the toner detection surface 10a4 with a predetermined pressing force.
It is. Therefore, the mounting accuracy of the sensor holder 26
Process cart without tightening
Magnetic bridge sensor 25 for toner in ridge C
It is possible to keep the position accuracy of the detection winding of
Become. As a result, the degree of freedom of the device configuration is increased, and the cost of the device is increased.
Toner detection (remaining amount) while keeping the
Exit can be realized. {Stirring Means} The stirring means is a process cart.
Stir the toner in the toner container 10a of the ridge C
Along with sending out to the developing sleeve 10c, a magnetic bridge
Prevents toner aggregation and uneven distribution above the sensor 25
This prevents erroneous detection of the presence or absence of toner. Agitator
The step is, as shown in FIGS. 5 and 9, the toner storage container 10a.
The first stirring member 19, the second stirring member 20, and the stirring
And a computer 21. The first stirring member 19 is a reference stirring member.
Therefore, a plurality of bar-shaped members having a triangular cross section
The first stirring member 1
The shaft 19a provided on the tip side of the stirrer 9 is
It is fitted in the hole 21a. Note that the first stirring member 19 has
To the magnetic bridge sensor 25 described1st Qing
As a sweeping meansThe first cleaning unit 19e is provided integrally, and
An opening 19b is provided on the side of the developing sleeve 10c.
You. Further, a U-shaped groove 19 is provided on both sides of the opening 19b.
The rib 19d provided with c is formed. Also shown in FIG.
As shown, the long hole 21a is on the line passing through the rotation shaft 21b.
It is a long hole along the stirring arm 21. The stirring arm 21 is connected to the toner storage container 10a.
Around the rotating shaft 21b on the side walls 10a1 and 10a2 of
It is rotatably supported at one end, and one end thereof is a toner storage container 10a.
Penetrates outward from the side wall surface 10a2 of the
An arm 22 is attached. The bearing 2 is integrated with the toner storage container 10a.
4 is provided, and the second stirring member 20 is centered on the rotation shaft 20a.
And is rotatably supported by a bearing 24. Also,
The second stirring member 20 is eccentric with respect to the rotation shaft 20a.
The drive shaft 20b is provided at a position
Fits into the U-shaped groove 19c of the first stirring member 19. further
To the part for the magnetic bridge sensor 25Second cleaning means
AsThe second cleaning unit 20c is provided integrally. The side wall 10a2 of the toner container 10a
A rotating shaft 23a is provided integrally on the outside, and
The stirring gear 23 rotatably fitted to 3a is a photosensitive drum.
7 and around the rotation axis 23a. this
Eccentric eccentricity from the rotating shaft 23a on the side surface of the stirring gear 23
The dowel 23b is provided, and the eccentric dowel 23b is
22 is movably fitted in the long hole 22a. With the rotation of the photosensitive drum 7, the same driving source
When the stirring gear 23 rotates upon receiving the drive transmission from the
The arm 22 and the stirring arm 21 are centered on the rotating shaft 21b.
Then, the first stirring member 19 is reciprocated in the direction of arrow X in FIG.
Reciprocates in the direction of arrow Y to prevent toner aggregation and ubiquity
I do. On the other hand, the first stirring member 19 moves in the arrow Y direction.
When the backward movement is performed, the drive shaft 20b of the second stirring member 20 is moved to the first position.
The second stirring member receives a force from the rib 19d of the stirring member 19,
20 is reciprocated in the direction of arrow Z in FIG.
Rotate. The bottom wall of the toner container 10a
10a3 indicates that the toner is easily sent to the developing sleeve 10c
As shown in FIG.
And the stirring member 19 is moved along the bottom wall 10a3 by an arrow.
By reciprocating in the mark Y direction, the toner is
Is sent in the direction of the probe 10c. (Position of stirring member and magnetic bridge sensor)
Next, the first stirring member 19 and the second stirring member 20
And the positional relationship with the magnetic bridge sensor 25,
This will be described with reference to FIG. As described above, the process cartridge C
Is attached to the apparatus body 16 and the opening / closing cover 17 is closed.
Then, the detection head 25a of the magnetic bridge sensor 25
Of the toner container 10a of the process cartridge C
A pressure contact is made with the toner detection surface 10a4 provided on the bottom wall 10a3.
It is closely attached. Magnetic bridge used in this embodiment
The combination of the sensor 25 and the toner is
Then, the detection range E of the magnetic bridge sensor 25 becomes the detection head.
Within a radius of about 10.5 mm from the center of
In addition, there is a characteristic that the sensitivity becomes higher as approaching the center.
Detects the presence or absence of toner from outside process cartridge C
The sensitivity of the magnetic bridge sensor 25 is high
Is desirable, but the higher the sensitivity, the less residual toner
Detection of the magnetic bridge sensor 25 to respond to
It is necessary to minimize the residual toner within the
You. On the other hand, a stirring member for feeding the toner into the developing chamber
Stroke S is the maximum according to the fluidity and material of the toner.
It must be set appropriately. In the present embodiment, the first stirring
The stroke of the reciprocating movement of the member 19 is set to 9.7 mm.
ing. Therefore, the toner in the detection range E is first stirred.
It is difficult to scrape off only with the member 19. Why
A stirring member 3 having a plurality of cleaning units as shown in FIG.
When the first cleaning unit 31a is scraped off by the
The cleaning unit 31b removes substantially the entire toner in the detection range E.
It seems that it can be scraped off, but in such a configuration
In this case, between the first cleaning unit 31a and the second cleaning unit 31b
Only the toner sandwiched between them reciprocates with the stirring member 31
In this case, the magnetic bridge sensor 2
5 remains between the first cleaning unit 31a and the second cleaning unit 31b
In order to continue detecting the toner F1 that has been
Despite the shortage of c-side toner,
Shortage may not be detected. Also, the second cleaning unit 3
1b, the toner F2 pushed up the slope.
When the second cleaning unit 31b moves to the lower side of the slope,
Within the detection range E of the magnetic bridge sensor 25
It may collapse, and this is the magnetic bridge sensor 2
5 may be detected. The amount of toner that collapses is small.
Even if the amount, the detection head of the magnetic bridge sensor 25
The closer to the center of 25a, the greater the effect on the output value
Therefore, even if the toner on the developing sleeve 10c side is insufficient.
Regardless, toner shortage may not be detected.
You. Therefore, in this embodiment, FIG.
Thus, the toner is within the detection range E of the magnetic bridge sensor 25.
-Arrange the rear wall 10a5 of the storage container 10a and perform the first stirring.
The range of the reciprocating movement of the member 19 is determined by the first cleaning unit 19e.
-Abut or close to rear wall 10a5 of storage container 10a
It is arranged to be. Angle of this rear wall 10a5
Is upward at an angle of about 80 ° to the horizontal
To the outside of the toner storage container 10a
The vertical direction of the toner storage container 10
It is set within the range of the direction toward the inside of a. The rear wall 10a5 is connected to the magnetic bridge sensor 2
5 within the detection range E to clean the toner.
Required area is reduced, resulting in the required number of cleaning members.
Lower parts cost due to reduced number of parts
You can hold it down. Further, the first cleaning portion 19e is mounted on the rear wall 10a5.
12 is configured so as to contact or approach
As shown, the bottom wall 10a3 is formed by the first cleaning unit 19e.
The toner raked to the right side of the figure along
As a result of being sandwiched between the portion 19e and the rear wall 10a5,
To the first cleaning unit 19e or the first cleaning unit 19
Fall to the left of e. After that, the first stirring member 19 is
By moving to the left, this toner is
19e, it is sent to the developing sleeve 10c side. others
Of the toner scraped by the first cleaning unit 19e.
The mountain collapses within the detection range E of the magnetic bridge sensor 25
It is possible to reliably detect toner shortage
it can. The angle of the rear wall 10a5 is set as described above.
Between the first cleaning unit 19e and the rear wall 10a5.
The toner sandwiched between the first cleaning unit 19 e and the first cleaning unit 19 e
It is easy to fall to the left side of the sweep section 19e, and the magnetic bridge
Toner in the detection range E of the sensor 25 is more reliably eliminated.
Can be In this embodiment, the toner container 10a is
The bottom wall 10a3 is on the side of the developing sleeve 10c as described above.
Because it is formed as a slope that becomes lower toward
The toner scraped above the slope of the wall 10a3 is below the slope.
Easily collapses toward the magnetic bridge sensor 25 located on the side
No. Therefore, the magnetic bridge sensor 25 has a slope
The upper rear wall 10a5 is connected to the magnetic bridge sensor 25.
It is arranged within the detection range E, and the first agitating member 19
The range is set so that the first cleaning unit 19e is positioned after the toner storage container 10a.
It should be placed in contact with or close to the face wall 10a5.
Thus, the shortage of the toner can be reliably detected. Note that, in the present embodiment,
In addition, the detection range E of the magnetic bridge sensor 25 is the detection head.
The radius is approximately 10.5 mm from the center of the door 25a.
Therefore, the rear wall 10a5 of the toner container 10a is
Is placed at a position about 7.5 mm from the center of the pad 25a.
ing. The angle of the rear wall 10a5 is set to be substantially vertical.
ing. In this embodiment, the first cleaning unit 19
e, the toner on the developing sleeve 10c side in the reciprocating stroke of
The second cleaning unit 2 of the second stirring member 20
0c reciprocally swings away from the bottom wall 10a3
It is configured as follows. In the present embodiment, the first stirring member 1
9 and the second stirring member 20 are synchronously moved in the same direction.
It is configured to work. Next, the first stirring member 19 and the second stirring member 2
0 to FIG. 13 to FIG.
Will be described. The first stirring member 19 moves to the developing unit 10c side.
When moved, the toner on the magnetic bridge sensor 25
(1) Developing three by the first cleaning unit 19e of the stirring member 19
As well as escape upward
Therefore, the developing stroke of the reciprocating stroke of the first cleaning unit 19e is reduced.
A mountain F3 of toner is formed on the side of the leave 10c (see FIG. 13).
See). Next, the first stirring member 19 moves to the right in the drawing.
Accordingly, the second cleaning unit 20c of the second stirring member 20 is also shown in FIG.
Moving to the right, the second cleaning unit 20c
3 is displaced to the right (see FIG. 14).
The lower toner does not move to the right. Further, the first stirring unit
When the material 19 moves to the left side in the figure, the broken toner
1 The cleaning section 19e again scratches the developing sleeve 10c.
At this time, the toner escapes upward
Because it is also moved to the left, the toner moving to the left
When pressed, the toner on the lower side of the second cleaning unit 20c also moves to the left.
(See FIG. 15). By repeating the above operation
Of the reciprocating stroke of the first cleaning unit 19e.
The toner mountain F3 formed on the side of the drive 10c is gradually developed.
It is sent to the leave 10c side, and the second cleaning unit 20c is eventually
Even if it moves to the right side in the figure, the magnetic bridge sensor 25 side
The toner does not collapse. Therefore, the first cleaning unit 19e and
No toner remains between the second cleaning unit 20c.
In addition, shortage of toner can be reliably detected. In the present embodiment, the second stirring member 20
The second cleaning unit 20c is separated from the bottom wall 10a3.
The first agitating unit is configured to swing back and forth in the
Movement of first cleaning unit 19e and second cleaning unit 20c of material 19
As shown in FIG. 16, the toner F4 remains outside the range. This
Is the detection range of the magnetic bridge sensor 25.
Although it remains in the box E, the magnetic bridge sensor 25
At a position distant from the center of the detection head 25a,
Responds to the magnetic bridge sensor 25
The effect of this is small and the magnetic
Sufficiently smaller than the output value of the bridge sensor 25
Therefore, there is no problem in detecting the toner shortage. This implementation
In the embodiment, the second cleaning unit 20c is connected to the first cleaning unit 19e.
Because it is provided below the slope of the bottom wall 10a3,
The residual toner F4 collapses toward the magnetic bridge sensor 25.
Will not detect the toner shortage.
Wear. In this embodiment, the residual toner F4
In order to reduce the amount, as shown in FIG.
Bottom wall 1 at the end of the reciprocating stroke S1 of the portion 19e
0a3, the second stirring member 20
The position of the rotation shaft 20a is arranged. Arrange like this
By this, the second cleaning unit 20c and the bottom wall 10a3
The interval G1 is equal to the reciprocating stroke S of the first cleaning unit 19e.
Magnetic bridge sensor because it is minimal at the end of 1
To reduce the amount of residual toner F4 on the side close to -25
Can be. As a result, when there is sufficient toner
Is empty, and the output value of the magnetic bridge sensor 25 is
Because there is a large difference, a scan is performed to determine the presence or absence of toner.
As the freedom to set the threshold increases, the magnetic
For mounting position, sensitivity, adjustment, etc. of the ridge sensor 25
This prevents false detections due to fluctuations and noise.
Wear. Furthermore, a configuration that minimizes the above-mentioned variation,
A circuit for amplifying the output value of the magnetic bridge sensor 25
No need for roads, etc., keeps equipment costs low
be able to. The second cleaning unit 20c and the bottom wall 10a3
The distance G1 between the toner and the toner is determined by the fluidity and magnetic permeability of the toner and the magnetic bridge.
0.5mm to 3mm depending on the sensitivity of the sensor.
In the present embodiment, the interval G1 is set to about 1
mm. {Determination Method of Toner Remaining Amount}
FIG. 17 shows the analog detection signal of the air bridge sensor 25.
Show. The toner is near the magnetic bridge sensor 25.
While there is enough, the first cleaning unit 19e of the first stirring member 19 and
And the second cleaning part 20c of the second stirring member 20 is a magnetic bridge.
Even if the toner on the sensor 25 is scraped off,
To fill the magnetic bridge sensor 25 immediately,
The output value (Vout) of the magnetic bridge sensor 25 is high
The values are shown (FIG. 17 (a)). The amount of toner has decreased to some extent
When the first cleaning unit 19e and the second cleaning unit 20c come,
After scraping off the toner, the toner around
To fill the ridge sensor 25, the magnetic bridge sensor
The output value (Vout) of the circuit 25 fluctuates during the stirring cycle.
And gradually generate negative ripple
The output voltage is reduced (FIG. 17B. Toner)
Is empty, the first cleaning unit 19e of the first stirring member 19 and the
And the second cleaning unit 20c of the second stirring member 20 scrapes the toner.
After dropping, the toner fills the magnetic bridge sensor 25.
The output of the magnetic bridge sensor 25
The value (Vout) indicates a low value (FIG. 17 (c).
The presence or absence (remaining amount) of toner from the sensor output
I know. Next, the above-mentioned determination of presence / absence (remaining amount) of toner
The method will be described with reference to FIG. Output of the magnetic bridge sensor 25 itself
Variations, variations in the power supply voltage from the main unit,
Due to variations in the magnetic properties of the toner
In the state, the sensor output value (Vout) varies
You. Therefore, the sensor output when judging that there is no toner
The force value (slice level = Vs)
Must be set. However,
As described above, when the toner amount decreases, the first cleaning unit 19e and
The output voltage is output at the stirring cycle due to the influence of the second cleaning unit 20c.
In order to lower the output voltage while causing power fluctuation,
Simply when the output goes below Vs at a certain timing
If it is determined that there is no toner, the toner storage container 10a
It is judged that there is no toner even though toner remains
Can't make proper toner judgment
No. Therefore, in the present embodiment, a predetermined slice level is used.
(Vs) or less, the duration T of the output signal is counted,
First when the duration lasts for a predetermined time (Ts) or more
To determine that there is no toner. The information on the absence of toner detected in this way is shown in FIG.
2 by displaying on the operation panel 30 shown in FIG.
Notify the inspection of process cartridge C and
Prompts you to change the fax and prohibits the recording operation of the facsimile machine.
To prevent loss of image information due to fading of recorded images
are doing. (Embodiment 2) Next, a second embodiment will be described.
Thus, the first stirring member 19 and the second stirring member 35 are synchronized with each other.
FIG. 18 shows a configuration in which
Will be explained. The second embodiment is different from the first embodiment.
Rotating the drive side of the second stirring member with respect to the second cleaning unit
It is arranged on the opposite side of the shaft. That is, in FIG.
Thus, the second stirring member 35 is rotatable about a rotation shaft 35a.
Are supported by a bearing 24. Also, the second stirring unit
The material 35 has a position eccentric upward with respect to the rotation shaft 35a.
The drive shaft 35b is provided in the
1 Fits into the U-shaped groove 19c of the stirring member 19. Embodiment
Other configurations of the second embodiment are the same as those of the first embodiment. With the above configuration, the first stirring
When the stirring member 19 moves to the right in the figure, the second stirring member 35
Is driven by the rib 19d of the first stirring member.
Accordingly, the second stirring member 35 is moved around the rotation shaft 35a at the time.
It turns in the measuring direction. Similarly, the first stirring member 19 is
When the second stirring member 35 moves to the middle left side, the rotation shaft 35a
Pivots counterclockwise around Next, the operation of the stirring member as described above is performed.
The movement of the toner will be described with reference to FIGS.
When the first stirring member 19 moves to the right in the drawing, the first stirring unit
The toner on the right side of the first cleaning unit 19 e of the material 19 is the bottom wall 10.
It is raked to the right along a3, and the first cleaning unit 19e
As a result of being sandwiched between the rear wall 10a5,
It falls to the left side of the first cleaning unit 19e (see the arrow in FIG. 19).
See). Thereafter, the first stirring member 19 moves to the left in the figure.
As a result, the toner mountain F5 is removed from the first cleaning unit 19e.
To the developing sleeve 10c side. At this time
2 The second sweeping portion 35c of the stirring member 35 is the same as the first cleaning portion 19e.
Also on the right side (see FIG. 20). Next, the first stirring
The second cleaning unit 3 is synchronized with the movement of the member 19 to the right.
5c moves to the left and is scraped by the first cleaning unit 19e.
Fold the toner pile F5 to the left (see FIG. 21).
See). As described above, in the second embodiment, the second stirring
The toner is always present by the second cleaning unit 35c of the stirring member 35.
It is collapsed toward the image sleeve 10c. Therefore, the above implementation
Compared to mode 1, the magnetic bridge sensor 25
Can be more strongly removed. In the first and second embodiments, the toner
Select the one that is appropriate for the characteristics and the configuration of the stirring member.
No. (Reference example) nextReference exampleAs a result, the magnetic bridge
FIG. 22 shows a configuration for cleaning the sensor detection range.
Will be described. BookReference exampleIs the same as in the first embodiment.
The bottom of the toner container of the first cleaning unit of the first stirring member
On the lower side of the wall, place the second cleaning section away from the bottom wall
Is placed. That is, in FIG.
36 is a shaft 36a provided on the tip side,
And is fitted in the long hole 21a of the second embodiment.
Along the bottom wall 10a3 of the toner container 10a.
It is configured to reciprocate. 36e is stirring
A first cleaning unit integrally provided on the rear end side of the member 36;
The toner is scraped off on the knurl detection surface 10a4. First cleaning
The reciprocating range of the portion 36e is the same as in the first embodiment.
Or near the rear wall 10a5 of the container 10a
It is configured to touch. 36f is for the stirring member 36
A second cleaning unit provided integrally with the first cleaning unit 36e.
Then, on the lower side of the bottom wall 10a3,
It is provided at a distance G2. The first cleaning unit 36e and the second cleaning unit 36
The interval L with respect to f is the reciprocating stroke S of the stirring member 36.
2 so that the first cleaning unit 36
e part of the reciprocating movement range and the reciprocating movement of the second cleaning unit 36f
It is configured so that a part of the range overlaps. Bookthree
ExampleOther configurations are the same as those in the first embodiment. Next, the operation of the stirring member as described above is performed.
The movement of the toner will be described with reference to FIGS.
When the stirring member 36 moves toward the developing sleeve 10c,
The toner on the air bridge sensor 25 is removed by the first cleaning unit 36.
e, it is raked toward the developing sleeve 10c.
First, the first cleaning unit 36e reciprocates to escape upward.
The toner peak F6 is provided on the developing sleeve 10c side of the dynamic stroke.
(See FIG. 23). Next, the stirring member 36 is moved to the right side in the figure.
The second cleaning unit 36f moves the toner
Of the second cleaning section 36f.
The knuckle does not move to the right (see FIG. 24). Next, stir
When the member 36 moves to the left in the drawing, the broken toner
To the developing sleeve 10c side again by the first cleaning unit 36e
At this time, the toner escapes upward.
The tongue that moves to the left
And the toner on the lower side of the second cleaning unit 36f also moves to the left.
Move (see FIG. 25). To repeat the above operation
Thus, the toner between the first cleaning unit 36e and the second cleaning unit 36f
-F6 is sent little by little to the developing sleeve 10c side,
Even if the second cleaning unit 36f moves to the right in the drawing, the magnetic brush
The toner does not collapse on the ridge sensor 25 side (FIG. 26).
reference). Therefore, above the magnetic bridge sensor 25
There is no residual toner, and the lack of toner is reliably detected.
You can know. The bookReference exampleThen, the second cleaning unit 36f
Swings back and forth while being separated from the bottom wall 10a3.
The first cleaning unit 36e and the second cleaning unit 36e.
Outside the moving range of the portion 36f, the toner is
Remains. This residual toner F7 is a magnetic bridge sensor
25, but remains within the detection range E of the magnetic bridge cell.
Is located away from the center of the
Although it responds to the magnetic bridge sensor 25,
Influence is small, and the magnetic
Is sufficiently smaller than the output value of the
There is no problem in detecting the toner shortage. This residual Tona
In order to reduce the amount of cleaning, the second cleaning section 36f and the bottom wall
The distance G2 from the toner 10a3 depends on the toner fluidity, magnetic permeability,
0.5mm to 3mm depending on the sensitivity of the bridge sensor
It is preferable to set the interval G2 in this embodiment.
It is set to about 1 mm. The book as described aboveReference exampleSo easier
With the simple configuration, the same effect as in the first embodiment can be obtained.
Therefore, the cost of the apparatus can be kept low. In the above embodiment, the first cleaning
Although the example using the means and the second cleaning means is shown, the present invention
According to this, the number of cleaning means is not limited to two, but may be two or more.
The above multiple numbers may be used. As described above, according to the present invention,
LightEmbodiment ofAccording to this, the following effects are obtained. (1) The toner container isToner level sensorDetection range
First cleaning hand that can reciprocate to clean toner inside
Having a step and a second cleaning means, a first cleaning means and a second cleaning means
Means areToner level sensorPart of the detection range of
Cleaning, the cleaning range of the first cleaning unit and the cleaning range of the second cleaning unit.
The range combined with the sweep range isToner level sensorDetection range
Agitation suitable for toner characteristics
When,Toner level sensorCleaning of the entire detection range
Erroneous detection of the remaining amount of toner can be prevented. (2) In the above, a part of the cleaning range of the first cleaning means,
Make sure that part of the cleaning area of the second cleaning means overlaps
And the positional relationship of each cleaning means is roughly arranged
Can reduce the cost of equipment in addition to the above effects
be able to. (3) In the above, the second cleaning means is a wall of the toner storage container.
Reciprocally move away from the surface, and store the toner with the second cleaning means.
The distance between the container and the wall surface is determined by the first cleaning unit and the toner container.
Multiple cleaning hands
The toner trapped between the steps can be eliminated,
In addition to the result, erroneous detection of the remaining amount of toner can be prevented. (4)In the above, the moving direction of the first cleaning means and the second cleaning
The directions of movement of the sweeping means are the same in the same period.
Or in the opposite direction, add to the above effects.
Select an appropriate cleaning method according to the properties of the toner.
Can be (5) A plurality of cleaning means in the embodiment of the present invention
With the integrated construction, the number of parts can be reduced,
In addition to the effect, the cost can be kept low. (6) Among the plurality of cleaning means described above, toner storage
If the distance between the container and the container is larger,
By placing it on the lower side of the container wall, residual toner
Can be prevented from collapsing toward the toner detecting means, and
In addition, erroneous detection of the remaining amount of toner can be prevented.(7) Within the detection range of the toner remaining amount sensor of the toner storage container
Has reciprocating cleaning means to clean toner
And a toner storage container within a detection range of the toner detection means.
Of the wall, and the inclination direction of this wall is
The toner collection increases as the angle increases by approximately 80 °.
From the direction toward the outside of the container, beyond the vertical, upward
Within the direction toward the inside of the toner container as you go
Due to this, it is provided within the detection range of the toner detection unit.
The toner accumulates and remains on the wall side of the toner container.
Can be prevented. [0119]The above effects are obtained by storing the toner having the above configuration.
Developing device having process container, process cartridge and the same
Developing device or electronic with process cartridge
It is effective when employed in a photographic image forming apparatus. [0120]【The invention's effect】 The toner container is
A reciprocating movable second to clean toner within the detection range
(1) Driving force by reciprocating movement of the first cleaning means and the first cleaning means
And a second cleaning means for cleaning the toner after the cleaning.
The sweeping means removes part of the detection range of the toner remaining amount sensor with toner.
Reciprocating along the bottom wall surface of the storage container, the second cleaning means
Reciprocates around a part of the detection range of the toner remaining sensor,
The center of rotation of the second cleaning means is within the cleaning range of the first cleaning means.
From the end in a direction substantially perpendicular to the bottom wall of the toner container
By being located, it remains below the rotating second cleaning means.
The amount of toner to be retained can be reduced,
Increases the freedom of threshold setting for judgment and prevents false detection
And the cost of the apparatus can be kept low.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a longitudinal sectional view of a facsimile apparatus according to an embodiment of the present invention. FIG. 2 is an external perspective view of the facsimile machine. FIG. 3 is a longitudinal sectional view for explaining an operation of mounting a process cartridge to a facsimile apparatus. FIG. 4 is a longitudinal sectional view for explaining an operation of mounting a process cartridge to a facsimile apparatus. FIG. 5 is a vertical sectional view of the process cartridge according to the first embodiment. FIG. 6 is an external perspective view of a process cartridge. FIG. 7 is a plan view showing a mounting configuration of a magnetic bridge sensor. FIG. 8 is a side view showing a mounting configuration of the magnetic bridge sensor. FIG. 9 is a perspective view in which main parts of the process cartridge according to the first embodiment are cut and shown. FIG. 10 is a longitudinal sectional view illustrating a positional relationship between a cleaning unit and a magnetic bridge sensor of the process cartridge according to the first embodiment. FIG. 11 is a vertical cross-sectional view illustrating an example of a problem with the cleaning unit. FIG. 12 is a longitudinal sectional view for explaining the operation of the cleaning means and the flow of the toner in the process cartridge according to the first embodiment. FIG. 13 is a longitudinal sectional view for explaining the operation of a cleaning unit and the flow of toner in the process cartridge according to the first embodiment. FIG. 14 is a vertical cross-sectional view illustrating the operation of a cleaning unit and the flow of toner in the process cartridge according to the first exemplary embodiment. FIG. 15 is a longitudinal sectional view for explaining the operation of the cleaning means and the flow of toner in the process cartridge according to the first embodiment. FIG. 16 is a longitudinal sectional view for explaining the operation of the cleaning means and the flow of toner in the process cartridge according to the first embodiment. FIGS. 17A, 17B, and 17C are timing charts of a toner presence / absence detection signal according to the first embodiment; FIG. 18 is a longitudinal sectional view of the process cartridge according to the second embodiment. FIG. 19 is a vertical cross-sectional view illustrating an operation of a cleaning unit and a flow of toner in the process cartridge according to the second embodiment. FIG. 20 is a longitudinal sectional view illustrating the operation of a cleaning unit and the flow of toner in the process cartridge according to the second embodiment. FIG. 21 is a longitudinal sectional view illustrating the operation of a cleaning unit and the flow of toner in the process cartridge according to the second embodiment. FIG. 22 is a longitudinal sectional view of a process cartridge according to a reference example . FIG. 23 is a longitudinal sectional view illustrating the operation of a cleaning unit and the flow of toner in the process cartridge according to the reference example . FIG. 24 is a longitudinal sectional view illustrating the operation of a cleaning unit and the flow of toner in the process cartridge according to the reference example . FIG. 25 is a longitudinal sectional view illustrating the operation of a cleaning unit and the flow of toner in the process cartridge according to the reference example . FIG. 26 is a longitudinal sectional view illustrating the operation of a cleaning unit and the flow of toner in the process cartridge according to the reference example . [Description of Signs] A: Document reading device B: Image forming device C: Process cartridge D: Paper feeding unit E: Magnetic bridge sensor detection range F1: Residual toner F2: Toner F3: Toner pile
F4: Residual toner F5: Toner pile F6: Toner
F7: Residual toner G1: Distance between the second cleaning unit and the bottom wall G2: Distance between the second cleaning unit and the bottom wall L: Distance between the second cleaning unit and the second cleaning unit S: Stroke of the stirring member S1 First cleaning unit stroke S2: stirring member stroke T ... signal duration Ts ... predetermined time Vout ... sensor output value Vs ... slice level 1 ... optical means 1a ... optical unit 1b ... laser diode 1c ... polygon mirror 1d ... scanner motor 1e ... Imaging lens 1f Reflecting mirror 2 Recording paper 3 Conveying means 3a Feeding cassette 3a1 Separating claw
3b: feeding roller 3c: cassette conveying roller 3d:
Conveyance roller pair 3e Guide plate 3f Discharge roller pair 4 Transfer unit 5 Fixing unit 5a Driving roller 5b Heater 5c
.., Fixing member 6, discharge tray 7, photosensitive drum 8, charging means (charging roller) 8 a, roller shaft 9, exposure unit 10, developing means 10 a, toner container 10 a 1
10a2: Side wall 10a3: Bottom wall 10a4: Toner detection surface 10a5: Rear wall 10b: Magnet 10c
Developing sleeve 10d Developing blade 11 Cleaning means 11a Cleaning blade 11b Squeeze sheet 11c Waste toner reservoir 12 Housing 12a Upper frame 12b Lower frame
12b1 Opening 12b2 Dowel 13 Document 14a Document placement table 14b1 Preliminary conveyance pressing piece 14
b2: Preliminary conveyance roller 14c: Reverse rotation roller 14d:
Separation roller 14e: pressing means 14f: discharge roller
14g Document discharge tray 14h Slider 15 Reading means 15a LED 15b Short focus imaging lens 15c Photoelectric conversion element 16 Device body 17 Opening / closing cover 17a Hinge 17b Rib 1
7c: pressing member 18: guide groove 19: first stirring member 19a: shaft 19b: opening 1
9c U-shaped groove 19d Rib 19e First cleaning unit 20 Second stirring member 20a Rotating shaft 20b Drive shaft 20c Second cleaning unit 21 Stirring arm 21a Slot 21b Rotating shaft 22 Drive arm 22a ... Long hole 23 ... Stirring gear 23a ... Rotating shaft 23b ... Eccentric dowel 24 ... Bearing 25 ... Magnetic bridge sensor 25a ... Detection head 2
5b ... body part 25c ... signal line 26 ... sensor holder 26a ... rotating shaft 26b ... sensor box 26c ... arm part 26d ... positioning rib 26e ... pressing part 26f ... left and right side wall 26g ...
Claw 27 Pressing spring 28 Pressing piece 29 Shutter member 30 Operation panel 31 Stirring member 31a First cleaning unit 31b Second cleaning unit 35 Second stirring member 35a Rotating shaft 35b Drive shaft 35c: second cleaning unit 36: stirring member 36a: shaft 36e: first cleaning unit 3
6f: Second cleaning unit

Continuation of the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) G03G 15/00 550 G03G 21/16-21/18 G03G 15/08-15/08 507

Claims (1)

(57) In a developing device detachable from an image forming apparatus main body, a developing member for developing a latent image formed on an image carrier with a toner , Of a toner remaining amount sensor provided in the image forming apparatus main body.
The sensor is located within the detection range and is supplied to the developing member.
A toner storage container containing a toner container, wherein the toner storage container is capable of reciprocatingly moving to clean toner within a detection range of the toner remaining amount sensor , and the first cleaning device. And a second cleaning unit that cleans toner by obtaining a driving force by reciprocating movement of the toner. The first cleaning unit extends a part of the detection range of the toner remaining amount sensor along a bottom wall surface of the toner container. Reciprocating, the second cleaning means reciprocatingly rotates a part of the detection range of the toner remaining amount sensor, and the rotation center of the second cleaning means is in the cleaning range of the first cleaning means. A developing device, wherein the developing device is located substantially perpendicular to a bottom wall surface of the toner container from an end.