JPH1078697A - Developing device unit and image forming device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To drop and recover developer spilled around an injection port to a space part from a recovery port and to prevent the periphery of a developing device from being soiled by the scattering of the developer by providing the recovery.port conducted to the space part in a housing proximately to the injection port of the housing. SOLUTION: Toner is prevented from being spilled from a replenishing port 78 by gradually closing the port 78 as a toner cartridge 70 is taken out to a front side, but the toner is dropped on a seal material 77 and to a gap between the material 77 and a shutter 83 from the port 78 until the shutter 83 is completely closed. By forming the recovery port 88 larger than the gap (s) between the material 77 and the shutter 83, the toner spilled from the port 78 is dropped and recovered to the space part 87 from the port 88. Furthermore, the toner accumulated on the material 77 is scraped to the port 88 side and dropped and recovered to the space part 87 in the case of taking out the cartridge 70 from the housing 13a. Thus, the image is prevented from being soiled and the ambient environment from being polluted.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a developing device unit and an image forming apparatus for replenishing toner to a developing device using a replaceable cartridge type developer replenishing device.

[0002]

2. Description of the Related Art Conventionally, a toner cartridge which is exchangeably attached to a toner injection port of a developing device for toner supply is accompanied by a replacement operation in order to prevent toner from dropping from the supply port at the time of replacement. It had a shutter mechanism that automatically opened and closed the supply port.

[0003]

Conventional toner cartridges have a shutter mechanism at a replenishing port to prevent the toner from dropping during replacement. However, when the toner cartridge is removed from the developing device, the shutter is completely closed. The toner is spilled from the replenishing port even before it is closed, and is dropped on the sealing material for tightly contacting the toner injection port and the replenishing port or in the gap between the sealing material and the shutter end, and is dropped on the sealing material. When the toner cartridge is removed, the toner is further scraped from the upper portion of the sealing material to the periphery thereof when the toner cartridge is removed, and the toner around the developing device is contaminated by the dropped toner. There is a problem that the surrounding environment is polluted.

Accordingly, the present invention has been made in order to solve the above-mentioned problem, and when the toner cartridge is removed, the surroundings are prevented from being stained by toner dropped until the shutter is completely closed, and the maintenance frequency is increased. An object of the present invention is to provide a developing device unit and an image forming apparatus which can obtain good image quality without causing any problems and are environmentally friendly.

[0005]

According to a first aspect of the present invention, there is provided an ink jet printer having an opening at a position facing an image carrier and having an inlet through which a replenishing developer is injected. A housing for housing the developer, developer holding means supported by the housing and for applying the developer to an electrostatic latent image formed on the image carrier at the opening, and It has a supply port that is replaceably attached and is opened and closed by opening / closing means that is slid along with the exchange operation with the housing, and that is inserted into the inlet at the time of attachment to the housing. A developer replenishing means for replenishing developer into the housing via an inlet, a recovery port formed on the housing upper surface at a position close to the injection port, Having a space for depositing the collected developer, replacing the developer replenishing means; It is intended to provide a recovery means for recovering the developer dropped from the replenishing port to.

According to a second aspect of the present invention for solving the above-mentioned problems, an opening is provided at a position facing the image carrier, and an inlet is provided for supplying a developer for replenishment. A housing which is supported by the housing, a developer holding means which applies the developer to an electrostatic latent image formed on the image carrier at the opening at the opening, and which is attached to a periphery of the inlet. A sealing means, which is replaceably attached to the housing, and has a supply port which is in close contact with the sealing means at the time of attachment to the housing and which is inserted through the inlet, and is used for an exchange operation with the housing. A shutter that slides to open the supply port when attached to the housing and closes the supply port when detached from the housing, and develops the supply port from the supply port into the housing through the inlet. Developer replenishing means for replenishing means, and the developer replenishing means A recovery port formed in the upper surface of the housing below a gap between the shutter end and the sealing means which is generated at the time of removal from the body, and the developer which is conducted to the recovery port and recovered from the recovery port And a collecting means for collecting the developer dropped from between the shutter end and the sealing means when the developer replenishing means is replaced.

According to a third aspect of the present invention, there is provided an image forming apparatus having an opening at a position opposed to an image carrier and having an inlet for supplying a replenishing developer. A housing which is supported by the housing, a developer holding means which applies the developer to an electrostatic latent image formed on the image carrier at the opening at the opening, and which is attached to a periphery of the inlet. A sealing means, which is replaceably attached to the housing, and has a supply port which is in close contact with the sealing means at the time of attachment to the housing and which is inserted through the inlet, and is used for an exchange operation with the housing. A developer supply means for slidably opening and closing the supply port; and a developer supply means for supplying developer from the supply port to the housing through the injection port; and a housing formed to regulate the shutter. Operation for removing the developer supply means from the housing A shutter stopper that regulates the shutter and slides and closes, and a shutter stopper formed on the upper surface of the housing below a gap between the shutter end and the sealing device that occurs when the developer supply unit is removed from the housing. A collecting port, and a space that communicates with the collecting port and deposits the developer collected from the collecting port. The shutter end and the developer end when the developer replenishing unit is removed from the housing. And a collecting means for collecting the developer dropped from between the sealing means.

According to a fourth aspect of the present invention, there is provided an image forming apparatus having an opening at a position opposed to an image carrier and having an inlet through which a replenishing developer is injected. A housing which is supported by the housing, a developer holding means which applies the developer to an electrostatic latent image formed on the image carrier at the opening at the opening, and which is attached to a periphery of the inlet. A sealing means, which is replaceably attached to the housing, has a supply port which is inserted into the inlet in close contact with the sealing means at the time of attachment to the housing, and accompanies an exchange operation with the housing. A developer supply means for slidably opening and closing the replenishing port, and a developer replenishing means for replenishing developer from the replenishing port into the casing via the inlet, and formed on the casing to regulate the shutter; For removing the developer supply means from the housing A shutter stopper that regulates the shutter and slides and closes, and is formed in a concave shape on the upper surface of the housing between the sealing means and the shutter stopper, and is generated when the developer supply means is removed from the housing. A developer reservoir for depositing the developer dropped from a gap between the shutter end and the sealing means.

According to a fifth aspect of the present invention, there is provided an image forming apparatus having an opening at a position opposed to an image carrier and having an inlet through which a replenishing developer is injected. A housing which is supported by the housing, a developer holding means which applies the developer to an electrostatic latent image formed on the image carrier at the opening at the opening, and which is attached to a periphery of the inlet. A sealing means, which is replaceably attached to the housing, has a supply port which is inserted into the inlet in close contact with the sealing means at the time of attachment to the housing, and accompanies an exchange operation with the housing. A developer supply means for slidably opening and closing the replenishing port, and a developer replenishing means for replenishing developer from the replenishing port into the casing via the inlet, and formed on the casing to regulate the shutter; For removing the developer supply means from the housing A shutter stopper that regulates the shutter and slides and closes, and a lower side of a gap between the shutter end and the seal unit that occurs when the developer replenishing unit is removed from the housing. A collection port formed wider than the gap; and a space formed in the housing to communicate with the collection port and deposit the developer collected from the collection port. A collecting means for collecting the developer dropped from between the shutter end and the sealing means at the time of removal from the housing, and a concave shape on the upper surface of the housing between the sealing means and the shutter stopper. And a developer reservoir for depositing the developer dropped from a gap between the shutter end and the seal, which is formed when the developer supply unit is removed from the housing. Kicking those.

According to a sixth aspect of the present invention, there is provided an image carrier, a latent image forming means for forming an electrostatic latent image on the image carrier, and a developing device around the image carrier. A housing that has an opening at a position facing the image carrier and has an inlet through which a replenishing developer is injected, and a housing for storing the developer; Developer holding means for applying the developer to the electrostatic latent image formed on the image carrier, and is exchangeably attached to the housing, and is slid along with the exchange operation with the housing. A developer replenishing unit that is opened and closed by an opening / closing unit, has a replenishing port inserted through the inlet at the time of attachment to the housing, and replenishes developer from the replenishing port into the housing via the inlet; A collection port formed on the upper surface of the housing at a position close to the injection port, and a Has a space portion for depositing the developer recovered from through the recovery port, is intended to provide a recovery means for recovering the developer dropped from the replenishing port when replacing the developer supply unit.

According to a seventh aspect of the present invention, there is provided an image carrier, a latent image forming means for forming an electrostatic latent image on the image carrier, and a developing device around the image carrier. A housing that has an opening at a position facing the image carrier and has an inlet through which a replenishing developer is injected, and a housing for storing the developer; Developer holding means for applying the developer to the electrostatic latent image formed on the image carrier, sealing means attached to the periphery of the injection port, and exchangeably attached to the housing. A supply port that is inserted into the inlet in close contact with the sealing means when attached to the housing, and is slid along with an exchange operation with the housing, and the supply port is attached when attached to the housing. A shutter that closes the supply port when detached from the housing while opening the A developer replenishing means for replenishing the developing means into the housing from the replenishing port via the inlet; and a gap between the shutter end and the seal means which is generated when the developer replenishing means is removed from the housing. A collection port formed on the upper surface of the housing on the lower side, and a space that communicates with the collection port and deposits the developer collected from the collection port; A developing device unit including a collecting unit that collects the developer dropped from between the shutter end and the sealing unit.

According to another aspect of the present invention, there is provided an image bearing member, a latent image forming means for forming an electrostatic latent image on the image bearing member, and a developing device around the image bearing member. A housing that has an opening at a position facing the image carrier and has an inlet through which a replenishing developer is injected, and a housing for storing the developer; Developer holding means for applying the developer to the electrostatic latent image formed on the image carrier, sealing means attached to the periphery of the injection port, and exchangeably attached to the housing. Having a supply port that is inserted into the inlet in close contact with the sealing means when attached to the housing, and has a shutter that slides along with the exchange operation with the housing to open and close the supply port,
A developer replenishing means for replenishing the developer into the housing from the replenishing port through the inlet, and an operation of removing the developer replenishing means from the housing formed on the housing to regulate the shutter; A shutter stopper that regulates the shutter and slides and closes the shutter, and a lower portion of a gap between the shutter end and the sealing unit that is generated when the developer supply unit is removed from the housing. A recovery port formed, and a space that communicates with the recovery port and accumulates the developer collected from the recovery port, and the shutter end when the developer supply unit is removed from the housing. And a developing device unit comprising a collecting means for collecting the developer dropped from between the sealing means.

According to a ninth aspect of the present invention, there is provided an image carrier, a latent image forming means for forming an electrostatic latent image on the image carrier, and a developing device around the image carrier. A housing that has an opening at a position facing the image carrier and has an inlet through which a replenishing developer is injected, and a housing for storing the developer; Developer holding means for applying the developer to the electrostatic latent image formed on the image carrier, sealing means attached to the periphery of the injection port, and exchangeably attached to the housing. A shutter that opens and closes the supply port by sliding along with an exchange operation with the housing, and has a supply port that is in close contact with the sealing means when attached to the housing, A developer replenisher for replenishing the developer from the replenishing port into the housing via the inlet; A step, a shutter stopper formed on the housing to regulate the shutter, and a shutter stopper that regulates the shutter and slides and closes in accordance with an operation of removing the developer replenishing unit from the housing; The developer is formed in a concave shape on the upper surface of the housing between shutter stoppers and accumulates the developer dropped from a gap between the shutter end and the seal device generated when the developer supply unit is removed from the housing. And a developing device unit including a developer reservoir.

A tenth aspect of the present invention for solving the above-mentioned problems.
The present invention provides an image carrier, a latent image forming means for forming an electrostatic latent image on the image carrier, and a developing position provided around the image carrier, at a position facing the image carrier. A housing having an opening and having an inlet for injecting a replenishing developer therein for housing the developer, and an electrostatic latent image formed on the image carrier at the opening and supported by the housing. A developer holding means for applying the developer, a sealing means attached to the periphery of the inlet, and a replaceable attachment to the housing, which is in close contact with the sealing means when attached to the housing. Having a supply port inserted through the inlet and having a shutter that opens and closes the supply port that is slid along with an exchange operation with the housing,
A developer replenishing means for replenishing the developer into the housing from the replenishing port through the inlet, and an operation of removing the developer replenishing means from the housing formed on the housing to regulate the shutter; A shutter stopper that regulates the shutter and slides and closes the shutter, and a gap between the shutter end and the sealing means, which is generated when the developer replenishing means is removed from the casing, and And a space formed in the housing to communicate with the recovery port and deposit the developer recovered from the recovery port. Collecting means for collecting the developer dropped from between the shutter end and the sealing means at the time of removal from the housing; and a collecting means between the sealing means and the shutter stopper. A developer reservoir formed in a concave shape on an upper surface of the housing and for depositing the developer dropped from a gap between the shutter end and the sealing means generated when the developer replenishing unit is removed from the housing; And a developing device unit.

According to the above-mentioned means, the present invention allows the fallen toner to pass from the recovery port provided close to the injection port to the space, even though the toner spills on the injection port until the shutter is completely closed. By collecting and accumulating the toner, the toner is prevented from further scattering to the surroundings, the frequency of maintenance is reduced, and the surrounding environment is prevented from being stained.

[0016]

FIG. 1 is a block diagram showing an embodiment of the present invention.
This will be described with reference to FIGS.

FIG. 1 shows the entire image forming apparatus 100, including an image forming means 2, an automatic double-sided apparatus 4, and a large-capacity cassette apparatus 5.
And an automatic document feeder 6 for automatically supplying a document to a document table 30 on the upper surface of the device main body 1 and a paper feed unit 7.

A drum-shaped photoreceptor 10 is provided substantially at the center of the apparatus main body 1. Around the photoreceptor 10, the charging device 11 and the exposure device 12 Part 12a, developing device 13, transfer peeling char
The image forming unit 2 is provided with a jar 14, a cleaning device 16, and a charge removing device 17.

On the right side of the apparatus body 1, a side cassette 18 having a manual feed tray 18a
And a large-capacity cassette device 5 attached thereto,
Are mounted with first to third sheet cassette devices 7a to 7c for storing sheets P of an arbitrary size. Further, below the photoreceptor 10 of the apparatus main body 1, a sheet stacking section 4a of the automatic double-sided apparatus 4 is provided.

The first to fifth transport paths 33a to 33a to the transfer position 10a facing the transfer peeling charger 14 on the photoreceptor 10 from each paper feed cassette device for supplying the paper P, respectively. 33e are formed. On each of the transport paths 33a to 33e, a transport unit, which is a first to fifth paper feeder for taking out the paper P from the side cassette device 18, the large capacity cassette device 5, and the first to third paper feed cassette devices 7a to 7c, respectively. Pickup rollers 34a to 34e, first to fifth separation and conveyance rollers 36a to 36e for separating and conveying the taken out paper P, and first to third conveyance and transmission rollers 37a to 37c. Have been.

A registration roller 24 is provided in the apparatus main body 1.
Through which the toner image is transferred by the photoreceptor 10
Is transported to a pair of fixing rollers 27 including a heat roller 27a and a press roller 27b by a transport belt 26,
A main transport path 22 that guides the sheet to the paper discharge tray 9 via the transport rollers 19 and the paper discharge rollers 28 is formed.

Further, on the upstream side of the paper discharge roller 28 of the main transport path 22, the paper P after the fixing is discharged as it is,
Alternatively, there is provided a first gate 29 for sorting whether the sheet is to be conveyed to the photoconductor 10 again for double-sided copying.

That is, between the first gate 29 and the photoreceptor 10, a re-transport device 4 b which is a transport means and is composed of a guide plate 42 through which the paper P is inserted is provided. The sheet P is transported to the sheet stacking section 4a.

On the other hand, the automatic document feeder 6 includes a document tray 6
0 to pickup roller 61a, judgment roller 61
b, a transport belt 63 that is passed between the belt rollers 62 to transport the document transported through the aligning rollers 61c.
After the copying is completed, the original is discharged to the paper discharge unit 68 side by the transport belt 63 via the reversing roller 64a and the paper discharge roller 64b.

Next, the developing device unit 71 including the developing device 13 and a toner cartridge 70 as a developer replenishing means for replenishing toner to the developing device 13 will be described in detail. The developing device 13 includes a magnet roller 72, which is a developer holding unit, and first and second mixers 7 in a housing 13a.
A magnetic brush developing system is used in which the toner cartridges 3 and 74 are accommodated and development is performed using a two-component developer composed of a toner and a carrier.

An inlet 76 into which the replenishment toner is injected is provided in the housing 13a above the front side of the first mixer 73.
Is formed, and when the toner cartridge 70 is mounted, the sealing member 7 serving as a sealing means attached to the peripheral edge of the injection port 76.
7, it is electrically connected to a supply port 78 formed in the toner cartridge 70.

Here, the toner cartridge 70 has a stirring blade 81 for stirring the toner in the toner storage 80 and a transport auger 82 for transporting the toner in the toner storage 80 to a supply port 78. 78 can be opened and closed by a slide type shutter 83. Reference numeral 84 denotes a drive mechanism of the transport auger 82, which is attached above the housing 13a.

On the other hand, on the upper surface of the housing 13a, a shutter stopper 86 for holding and opening the shutter 83 together with the sealing material 77 is provided.
Is formed between the shutter stopper 86 and the seal member 77 on the upper surface of the housing 13a.
3. Collection port 88 which is conducted to space 87 formed around
Are formed. When the toner cartridge 70 is detached, the recovery port 88 is set at the end 86 of the shutter stopper 86.
The gap s is formed to be larger than the gap s formed between the shutter 83 and the seal member 77 that is in contact with the shutter member a. Further housing 1
A concave toner reservoir 90 is formed between the shutter stopper 86 and the seal member 77 on the upper surface 3a.

Next, the operation will be described. At the start of copying, necessary image forming conditions such as paper size, number of copies, copy magnification, etc. are input from an operation panel (not shown), and the original is placed on the original tray 60 of the automatic original feeder 6 or directly on the original platen 30. Set, turn on copy key (not shown) and start copying.

Thus, in the fixing roller 27 in which the image forming means 2, the automatic document feeder 6, the paper feeding unit 7, and the like are driven, the heating of the roller 27a is started. When a document is supplied from the automatic document feeder 6, the pick-up roller 61a and the separating roller 61 are used.
b, the original is placed on the original table 30 by the conveyor belt 63 via the aligning roller 61c.

On the other hand, in the apparatus main body 1, the photosensitive member 10
The charging, exposing, and developing steps are sequentially performed by the image forming means 2 in accordance with the rotation, a toner image is formed on the surface, and the toner image reaches the transfer peeling charger 14. In synchronization with this, the paper supplied from any one of the first to third paper feed cassette devices 7a to 7c, the side cassette 18, the manual feed tray 18a or the large capacity cassette device 5 according to the set paper size. P is transferred to the photosensitive member 10 at the timing when the tip is aligned with the toner image on the photosensitive member 10.
Is transferred to a transfer position 10a between the
After the upper toner image is transferred and separated from the photoreceptor 10, the toner image is inserted between the fixing rollers 27 by the transport belt 26 to fix the image.

Thereafter, the paper is conveyed to the paper discharge roller 28 and stacked on the paper discharge tray 9 in the case of a normal copy, while the first fixing is performed in the case of performing double-sided copying or multiple copying. After the end, the first gate 29 distributes the sheet to the automatic double-sided apparatus 4 side. After the transfer is completed, the photoreceptor 10 can be copied next through the cleaning device 16 and the charge removing device 17, and the copying operation is repeated until the required number of copies is reached.

In this way, while the copying operation is being performed sequentially, the toner in the developing device 13 is consumed, and the toner is supplied from the replenishing port 78 of the toner cartridge 70 to the housing 13 through the inlet 76.
When the toner cartridge 70 is emptied, the toner cartridge 70 is replaced. That is, the front cover (not shown) of the apparatus main body 1 is opened, the toner cartridge 70 is pulled out to the front side indicated by the arrow x, and is removed from the developing device 13. At this time, the shutter 83 is regulated by the shutter stopper 86, and with the removal of the toner cartridge 70 to the front side, the shutter 83 is slid in the direction of the arrow y with respect to the toner cartridge 70, thereby gradually closing the supply port 78 and replenishing the supply port 78.
However, until the shutter 83 is completely closed, the toner drops from the supply port 78 onto the seal member 77 and into the gap between the seal member 77 and the shutter 83.

However, a collecting port 88 larger than the gap s is formed below the gap s between the seal member 77 and the shutter 83, and the toner spilled from the supply port 78 passes through the collecting port 88 into the space. 87 and is collected. Further, the toner deposited on the sealing material 77 also
Is removed from the housing 13a and is scraped to the collection port 88 side and dropped and collected in the space 87. Note that floating toner generated between the shutter 83 and the upper surface of the housing 13a when spilled from the supply port 78 or scraped off from the sealing material 77 does not fall to the outside of the developing device 13, and most of the floating toner does not fall. Is accumulated in the toner reservoir 90.

Thereafter, after the toner cartridge 70 is removed with the shutter 83 completely closed, a new toner cartridge 70 is slid from the front side of the apparatus main body 1 to the side opposite to the arrow x, and the sealing member 77 is removed. The shutter 83 is regulated so as to be attached to the housing 13a while the supply port 78 is opened, so that toner can be supplied from the toner cartridge 70 to the developing device 13. Thereafter, the front cover is closed and the toner cartridge 70 is replaced. End the operation.

With this configuration, even when toner is spilled from the gap s between the shutter 83 and the seal member 77 until the shutter 83 is completely closed when the toner cartridge 70 is removed, the toner can be discharged from the collection port 88. Since it is dropped and collected in the space 87, there is no danger of falling and scattering around the developing device 13 and contaminating the surroundings or deteriorating the image quality, thereby reducing the maintenance frequency, and without polluting the environment. It can be maintained well. In addition, since the space for collecting the toner can use the gap formed in the housing 13 in the related art, there is no need to newly install a space, and there is no fear that the space is increased.

Further, the reservoir 90 on the upper surface of the housing 13a
Since the scattered toner that has not been collected and collected from the collection port can be collected, it is possible to prevent the scattered toner from further falling and scattered around the developing device and contaminating the surroundings.

The present invention is not limited to the above-described embodiment, but can be variously modified. If the supply port can be opened and closed in connection with the attaching / detaching operation, the insertion / removal direction of the developer supply means is not limited. The structure of the device is also arbitrary.

[0039]

As described above, according to the present invention, the shutter for removing the developer replenishing means is provided by providing the recovery port which is close to the injection port of the housing and is conducted to the space inside the housing. Until the developer is completely closed, the developer spilled around the injection port can be dropped and collected from the recovery port into the space, preventing the developer from being scattered around the developing device and improving the maintainability. In addition, the image and the surrounding environment can be prevented from being stained.

[Brief description of the drawings]

FIG. 1 is a configuration diagram illustrating an apparatus main body according to an embodiment of the present invention.

FIG. 2 is a schematic perspective view showing the toner cartridge according to the embodiment of the present invention.

FIG. 3 is a schematic perspective view showing a state in which a toner cartridge is attached to the developing device according to the embodiment of the present invention.

FIG. 4 is a partially enlarged view of FIG. 2 of the embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Device main body 10 ... Photoconductor 13 ... Developing device 13a ... Housing 70 ... Toner cartridge 71 ... Developing device unit 73 ... 1st mixer 76 ... Injection port 77 ... Sealing material 78 ... Supply port 83 ... Shutter 86 ... Shutter stopper 87: space portion 88: collection port 90: toner reservoir portion

Claims (10)

[Claims] A housing that has an opening at a position facing the image carrier and has an injection port into which a replenishing developer is injected, and that stores the developer; A developer holding unit that applies the developer to an electrostatic latent image formed on the image carrier; an opening / closing unit that is exchangeably attached to the housing and that is slid with an exchange operation with the housing. A developer supply unit that is opened and closed by means and has a supply port inserted through the inlet when attached to the housing, and a developer supply unit that supplies developer into the housing from the supply port through the inlet. A collecting port formed on the upper surface of the housing at a position close to an injection port, and a space that communicates with the collecting port and deposits the developer collected from the collecting port; Collection means for collecting the developer dropped from the supply port when replacing the developer. A developing device unit characterized by having: 2. A housing having an opening at a position facing the image carrier and having an injection port into which a replenishing developer is injected, and housing the developer, and a housing supported by the housing and having the opening. Developer holding means for applying the developer to the electrostatic latent image formed on the image carrier, sealing means attached to the periphery of the injection port, exchangeably attached to the housing, In addition to having a supply port that is in close contact with the sealing means and inserted through the inlet at the time of attachment to the casing, the supply port is slid along with the exchange operation with the casing and is attached at the time of attachment to the casing. A developer replenishing unit that has a shutter that opens and closes the replenishing port when detached from the housing, and replenishes a developing unit from the replenishing port into the housing via the inlet; and a developer replenishing unit. The shutter end and the front that are generated when the shutter is removed from the housing A collecting port formed in the upper surface of the housing below the gap with the sealing means, and a space portion which communicates with the collecting port and deposits the developer collected from the collecting port; A developing unit for collecting the developer dropped from between the shutter end and the sealing unit when the supply unit is replaced. 3. A housing having an opening at a position facing the image carrier and having an injection port into which a replenishing developer is injected, for storing the developer, and a housing supported by the housing and having the opening. Developer holding means for applying the developer to the electrostatic latent image formed on the image carrier, sealing means attached to the periphery of the injection port, exchangeably attached to the housing, A supply port that is in close contact with the sealing means when attached to the housing and has a supply port that is inserted into the injection port, and has a shutter that is slid along with an exchange operation with the housing to open and close the supply port, A developer replenishing means for replenishing developer from the replenishing port into the housing via the inlet; and a casing formed to regulate the shutter, and for removing the developer replenishing means from the casing. The shutter that regulates the shutter and slides and closes A stopper formed in the upper surface of the housing below a gap between the shutter end and the seal, which is generated when the developer replenishing unit is removed from the housing; A space for depositing the developer collected from the collection port, wherein the developer dropped from between the shutter end and the sealing means when the developer supply means is removed from the housing; And a collecting means for collecting the developer. 4. A housing which has an opening at a position facing the image carrier and has an injection port into which a replenishing developer is injected, and stores the developer, and a housing supported by the housing and having the opening. Developer holding means for applying the developer to the electrostatic latent image formed on the image carrier, sealing means attached to the periphery of the injection port, exchangeably attached to the housing, A replenishing port that has a replenishing port that is inserted into the inlet in close contact with the sealing means when attached to the housing, and has a shutter that is slid to open and close the replenishing port along with an exchange operation with the housing; A developer replenishing means for replenishing developer from the mouth into the housing via the inlet; and a casing formed to regulate the shutter, with removal operation of the developer replenishing means from the casing. ,
A shutter stopper that regulates the shutter and slides and closes; a shutter formed between the sealing means and the shutter stopper in a concave shape on an upper surface of the housing, the shutter being generated when the developer supply means is removed from the housing. A developing device unit comprising: a developer reservoir for depositing the developer dropped from a gap between an end portion and the sealing means. 5. A housing which has an opening at a position facing the image carrier and has an inlet through which a replenishing developer is injected, and which accommodates the developer, and which is supported by the housing and is provided with the opening. Developer holding means for applying the developer to the electrostatic latent image formed on the image carrier, sealing means attached to the periphery of the injection port, exchangeably attached to the housing, A replenishing port that has a replenishing port that is inserted into the inlet in close contact with the sealing means when attached to the housing, and has a shutter that is slid to open and close the replenishing port along with an exchange operation with the housing; A developer replenishing means for replenishing developer from the mouth into the housing via the inlet; and a casing formed to regulate the shutter, with removal operation of the developer replenishing means from the casing. A shutter that regulates the shutter and closes the slide A stopper, a recovery port formed at a lower side of a gap between the shutter end portion and the seal unit generated when the developer replenishing unit is removed from the housing, and formed on the upper surface of the housing to be wider than the gap, A space formed in the housing so as to conduct to the recovery port and deposit the developer recovered from the recovery port, and the shutter end portion when the developer supply means is removed from the housing. A collecting means for collecting the developer dropped from between the sealing means and the sealing means; and a recess formed in the upper surface of the housing between the sealing means and the shutter stopper, and the housing of the developer replenishing means. A developing device unit, comprising: a developer reservoir for accumulating the developer dropped from a gap between the shutter end and the sealing means generated when the shutter is removed from a body. 6. An image bearing member, a latent image forming means for forming an electrostatic latent image on the image bearing member, provided at a developing position around the image bearing member, and opened at a position facing the image bearing member. A housing having an injection port into which a developer for replenishment is injected and accommodating the developer, and an electrostatic latent image formed on the image carrier at the opening supported by the housing. A developer holding unit that applies the developer, and is exchangeably attached to the housing, and is opened and closed by an opening / closing unit that is slid along with an exchange operation with the housing, and is attached to the housing. A developer replenishing means having a replenishing port inserted through the inlet and supplying the developer into the housing from the replenishing port via the injecting port, and formed on the upper surface of the housing at a position close to the injecting port; A collecting port, which is connected to the collecting port and collects the developer collected from the collecting port. Has between portions, an image forming apparatus characterized by comprising a developing device unit comprising a collecting means for collecting the developer that is dropped from the replenishing port when replacing the developer supply unit. 7. An image carrier, a latent image forming means for forming an electrostatic latent image on the image carrier, an image carrier provided at a developing position around the image carrier, and an opening at a position facing the image carrier. A housing having an injection port into which developer for replenishment is injected and containing the developer, and an electrostatic latent image formed on the image carrier at the opening supported by the housing and formed at the opening. Developer holding means for applying the developer,
Sealing means attached to the inlet periphery and a supply port which is replaceably attached to the housing and which is in close contact with the sealing means when attached to the housing and which is inserted through the inlet. Having a shutter that slides along with the exchange operation with the housing, opens the supply port when attached to the housing, and closes the supply port when detached from the housing. A developer replenishing means for replenishing the developing means into the housing via an inlet; and a lower side of a gap between the shutter end and the seal means generated when the developer replenishing means is removed from the housing. A collection port formed in the upper surface of the housing, and a space that communicates with the collection port and accumulates the developer collected from the collection port. Dropped from between sealing means An image forming apparatus characterized by comprising a developing device unit comprising a recovery means for recovering a serial developer. 8. An image carrier, a latent image forming means for forming an electrostatic latent image on the image carrier, and an image carrier provided at a developing position around the image carrier, and an opening at a position facing the image carrier. A housing having an injection port into which a developer for replenishment is injected and accommodating the developer, and an electrostatic latent image formed on the image carrier at the opening supported by the housing. A developer holding unit for applying the developer, a sealing unit attached to the periphery of the inlet, and a replaceable attachment to the housing, which is in close contact with the sealing unit when attached to the housing. A supply port that is inserted through the inlet, and a shutter that is slid along with the exchange operation with the housing to open and close the supply port. The developer is supplied from the supply port to the housing via the inlet. Developer supply means for replenishing the shutter, and formed in the housing to regulate the shutter. It is,
A shutter stopper that regulates the shutter and slides and closes in accordance with an operation of removing the developer replenishing unit from the housing; a shutter end portion and a sealing unit that are generated when the developer replenishing unit is removed from the housing; A collecting port formed on the upper surface of the housing below the gap between the developer supply port and a space portion that communicates with the collecting port and deposits the developer collected from the collecting port; An image forming apparatus comprising: a developing device unit including a collecting unit that collects the developer dropped from between the shutter end and the sealing unit when the developing unit is removed from the housing. 9. An image carrier, a latent image forming means for forming an electrostatic latent image on the image carrier, and an image carrier provided at a developing position around the image carrier, and an opening at a position facing the image carrier. A housing having an injection port into which a developer for replenishment is injected and accommodating the developer, and an electrostatic latent image formed on the image carrier at the opening supported by the housing. Developer holding means for applying the developer, sealing means attached to the periphery of the injection port, exchangeably attached to the housing, and in close contact with the sealing means when attached to the housing. And a shutter that is slid along with an exchange operation with the housing to open and close the supply port, and that the developer is supplied from the supply port into the housing through the injection port. A developer replenishing means for replenishing; and a housing formed to regulate the shutter. And
Along with the removal operation of the developer supply means from the housing, a shutter stopper that regulates the shutter and slides and closes, and is formed in a concave shape on the upper surface of the housing between the sealing means and the shutter stopper, A developing device unit comprising a developer reservoir for accumulating the developer dropped from a gap between the shutter end and the sealing means generated when the developer replenishing unit is removed from the housing. Characteristic image forming apparatus. 10. An image carrier, a latent image forming unit for forming an electrostatic latent image on the image carrier, and an image carrier provided at a developing position around the image carrier, and an opening at a position facing the image carrier. A housing having an injection port into which a developer for replenishment is injected and accommodating the developer, and an electrostatic latent image formed on the image carrier at the opening supported by the housing. A developer holding unit for applying the developer, a sealing unit attached to the periphery of the inlet, and a replaceable attachment to the housing, which is in close contact with the sealing unit when attached to the housing. And a shutter that is slid along with an exchange operation with the housing to open and close the supply port, and that the developer is supplied from the supply port into the housing through the injection port. Developer replenishing means for replenishing,
A shutter stopper formed on the housing so as to regulate the shutter, the shutter stopper regulating the shutter and slidingly closing the shutter in accordance with an operation of removing the developer supply means from the housing, and the housing of the developer supply means A collection port formed wider than the gap on the upper surface of the housing below the gap between the shutter end and the sealing means that occurs when the shutter is removed from the shutter, and communicates with the collection port to be collected from the collection port. A space formed in the housing so as to deposit the developer, wherein the developer is dropped from between the shutter end and the sealing means when the developer supply means is removed from the housing. A collecting means for collecting the developer, a concave shape formed on the upper surface of the housing between the sealing means and the shutter stopper, and a developing means for removing the developer supplying means from the housing; An image forming apparatus characterized by comprising a developing device unit comprising a developer reservoir for depositing the developer dropped from the gap of the shutter end portion and the sealing means that.