Patent Grant
7783234
The present application claims priority from Japanese Patent Application No. 2006-184708 filed on Jul. 4, 2006, Japanese Patent Application No. 2006-184709 filed on Jul. 4, 2006, and Japanese Patent Application No. 2006-184710 filed on Jul. 4, 2006, which are herein incorporated by reference.
1. Technical Field
The invention relates to developer cartridges, image forming apparatuses and shutter devices.
2. Related Art
An image forming apparatus such as a laser beam printer has been well-known. Such an image forming apparatus includes, for example, an image-bearing body that bears a latent image, and a developing section that makes the latent image borne by the image-bearing body visible using developer as a developer image. When image signals, etc. are transmitted from such external devices as a computer, the image forming apparatus makes a latent image borne by the image-bearing body visible as a developer image using the developing section, and transfers this developer image onto a medium and finally forms an image on the medium.
Further, the image forming apparatus has a developer cartridge for supplying the developing section with developer. The developer cartridge includes, for example, a shutter that opens and closes and a container for containing developer; when the shutter opens, developer inside the container is supplied to the developing section. In addition, the developer cartridge can be attached to and detached from an image-forming-apparatus body, and includes a handle member for grabbing the developer cartridge in attaching/detaching of the developer cartridge.
By the way, in order to move developer inside the container to the outside thereof (for example, to supply the developing section with the developer), it is necessary to properly open and close the shutter. On the other hand, if a complicated mechanism is provided in order to properly open and close the shutter, there is a risk that it induces increase of the number of components. Therefore, there is a need for a method that allows a simple configuration to properly open and close the shutter.
Furthermore, among image forming apparatuses are those including: a first opening and a second opening that are provided opposing each other and through which developer can pass; a first shutter that can move between a first closing position at which the first shutter covers the first opening and a first opening position at which the first shutter exposes the first opening; and a second shutter that can move between a second closing position at which the second shutter covers the second opening and a second opening position at which the second shutter exposes the second opening. Besides, the first shutter and the second shutter are provided adjacent to each other between the first opening and the second opening; developer can pass through the first opening and the second opening when the first shutter is located at the first opening position and the second shutter is located at the second opening position.
By the way, as a configuration which to open and close the first shutter and the second shutter, two configurations are proposed: one is a configuration in which the first shutter and the second shutter each move and open/close independently, and the other is a configuration in which one of the two shutters moves and opens/closes in conjunction with movement of the other shutter.
However, the former of the above-mentioned two configurations is likely to induce increase of the number of components. On the other hand, in the latter configuration, movement of two shutters is likely to be restricted. For example, assume that one of the two shutters presses the other one and moves from its opening position to its closing position. In such a case, the other shutter is pressed by the one shutter, and thereby the other shutter moves from its opening position to its closing position. Therefore, the two shutters stops simultaneously, and this restricts movement of the two shutters.
Moreover, among image forming apparatuses are those including a shutter device that can open and close. The shutter device is for allowing and restricting movement of developer between two units, for example. The shutter device includes a sealing member that includes an opening through which developer can pass and that is for preventing developer from spilling, and a shutter that can move between a first position at which the shutter covers the opening of the sealing member and a second position at which the shutter exposes the opening of the sealing member; the sealing member prevents developer from spilling while being pressed by the shutter. When the shutter moves to and is located at the second position (that is, when the shutter opens), developer can move between the above-mentioned two units.
However, there is a risk that the sealing member cannot sufficiently prevent spillage of developer when the shutter is located at the second position (that is, when the shutter opens).
For example, if, when opening, the shutter presses (compresses) only a part of the circumferential section of the opening of the sealing member, a section at which the thickness of the sealing member changes steeply will be formed in the circumferential section of the opening. There is a risk that, when the shutter opens, this causes a gap to be formed between the sealing member and an opposing member that the sealing member opposes, and that developer that is moving between the above-mentioned two units spills from the gap.
Note that JP-A-2001-83788 is an example of the related art.
An advantage of some aspects of the invention is that it is possible to realize a developer cartridge enabling a shutter to properly open and close in a simple configuration.
An aspect of the invention is the following developer cartridge.
A developer cartridge, including:
Another advantage of some aspects of the invention is that it is possible to realize an image forming apparatus enabling a first shutter and a second shutter to properly open and close in a simple configuration.
Another aspect of the invention is the following image forming apparatus.
An image forming apparatus, including:
Another advantage of some aspects of the invention is that it is possible to realize a shutter device enabling to sufficiently prevent developer from spilling.
Another aspect of the invention is the following shutter device.
A shutter device, including:
Other features of the invention will become clear by the accompanying drawings and the description hereinbelow.
For a more complete understanding of the invention and the advantages thereof, reference is now made to the following description taken in conjunction with the accompanying drawings.
At least the following matters will be made clear by the description in the present specification and the accompanying drawings.
A developer cartridge, including:
With this developer cartridge, the rotational-movement force that rotationally moves the handle member is utilized through the conversion mechanism and linearly moves the shutter so that the shutter opens and closes. Accordingly, this allows the shutter to open and close properly in a simple configuration.
In addition thereto, the conversion mechanism may include a rack section that is provided to the shutter, and a pinion section that is provided to the handle member and that can engage with the rack section; and the shutter may move linearly as a result that the rotational-movement force is converted into the linear-movement force due to the handle member moving rotationally in a state where the rack section and the pinion section are engaged with each other.
If the conversion mechanism includes the rack section and the pinion section, it is possible to easily convert the rotational-movement force into the linear-movement force.
In addition thereto, the shutter may be made of metal; the handle member may be made of resin; the rack section may consist of a plurality of holes that are provided at regular intervals; and the pinion section may consist of a plurality of projections that are provided at regular intervals and that can engage with the holes.
If the shutter is made of metal, holes are easier to be processed than projections. Therefore, if the rack section consists of holes, it is possible to easily form the rack section.
An image forming apparatus, including:
With this image forming apparatus, the rotational-movement force that rotationally moves the handle member is utilized through the conversion mechanism and linearly moves the shutter so that the shutter opens and closes. Accordingly, this allows the shutter to open and close properly in a simple configuration.
In addition thereto, the developer cartridge may include a handle-member locking section for locking the handle member so that the handle member cannot rotationally move relative to the container; the image-forming-apparatus body may include an unlocking section for releasing the locking between the handle member and the container, and a cartridge-inserted section into which the developer cartridge is inserted; when the developer cartridge is not inserted into the cartridge-inserted section, the locking by the handle-member locking section may restrict the rotational movement of the handle member relative to the container; and when the developer cartridge is inserted into the cartridge-inserted section, the locking may be released by the unlocking section so that the rotational movement of the handle member is allowed.
If the developer cartridge includes the handle-member locking section and the image-forming-apparatus body includes the unlocking section, it is possible to realize a simple configuration which can surely prevent the handle member from rotating incorrectly when the developer cartridge is not inserted into cartridge-inserted section.
In addition thereto, the handle-member locking section may include a protruding section that is provided on the handle member, and a fastening section that is provided to the container and that can fasten the protruding section; the unlocking section may be a projection portion that deforms the protruding section by contacting the protruding section; when the developer cartridge is not inserted into the cartridge-inserted section, the protruding section may be fastened by the fastening section; and when the developer cartridge is inserted into the cartridge-inserted section, the projection portion may deform the protruding section so that the fastening of the protruding section by the fastening section is released.
If the handle-member locking section includes the protruding section and the fastening section, and if the unlocking section is the projection portion, the protruding section can be easily fastened by the fastening section and the fastening of the protruding section by the fastening section can be easily released. Accordingly, it is possible to realize a simple configuration that can lock the handle member to the container and that can release the locking between the handle member and the container.
In addition thereto, the developer cartridge may be attached to the image-forming-apparatus body by rotationally moving the handle member to a predetermined position after the developer cartridge is inserted into the cartridge-inserted section; the image forming apparatus may include a container-locking section that is for locking the container to the cartridge-inserted section; and the container-locking section may include a hook that is provided to the handle member, and that moves with rotational movement of the handle member, and a hole section that is provided in the cartridge-inserted section, and through which the hook can move when the developer cartridge is inserted into the cartridge-inserted section and through which the hook cannot move when the developer cartridge is attached to the image-forming-apparatus body.
If the container-locking section includes the hook and the hole section, it is possible to realize a simple configuration which can lock the container to the cartridge-inserted section and release the locking between the container and the cartridge-inserted section.
An image forming apparatus, including:
With this image forming apparatus, it is possible to realize, without increasing the number of components, a simple configuration in which the first shutter and the second shutter can properly open and close.
In addition thereto, the image forming apparatus may include an image-forming unit that includes an image-bearing body for bearing a latent image, a containing section for containing developer, and a developer-bearing body for making the latent image borne by the image-bearing body visible using the developer as a developer image, and a developer cartridge that can be attached to and detached from the image-forming unit, and that is for supplying the containing section with the developer; the first opening and the first shutter may be provided to the image-forming unit; and the second opening and the second shutter may be provided to the developer cartridge.
If the first opening and the first shutter are provided to the image-forming unit, and if the second opening and the second shutter are provided to the developer cartridge, when, for example, the developer cartridge contains a small amount of developer, the developer cartridge is frequently attached and detached so that the two shutters frequently open and close. In such a case, if the operating section is provided, an effect that the two shutters can properly open and close in a simple configuration is achieved more effectively.
In addition thereto, the operating section may engage with the first shutter by elastic deformation of the operating section, and the operating section that engages with the first shutter may be disengaged from the first shutter by elastic deformation of the operating section.
In such a case, it is possible to realize a simple configuration in which the operating section can engage with the first shutter and the operating section engaging with the first shutter can be disengaged from the first shutter.
In addition thereto, a longitudinal direction of the first shutter may be along a longitudinal direction of the second shutter; the operating section may be an elastic metal piece that is located near both ends of the second shutter in its longitudinal direction; the first shutter may have an engaged-hole section with which the operating section can engage near both ends of the first shutter in its longitudinal direction; the developer cartridge may include a protrusion that pushes the operating section so as to project towards the first shutter when the second shutter moves; and the operating section may project towards the first shutter and can engage with the engaged-hole section when being pushed by the protrusion, and the operating section does not have to project and may be unable to engage with the engaged-hole section when not being pushed by the protrusion.
In the event that the operating section is an elastic metal piece, that the first shutter has the engaged-hole section with which the operating section can engage, and that the operating section engages with the engaged-hole section as a result of being pushed by the protrusion, it is possible to realize a simple configuration in which the operating section can engage with the second shutter.
In addition thereto, the second shutter may have a contacting section that can contact the first shutter when moving from the second closing position to the second opening position; and the first shutter may move from the first closing position to the first opening position as a result that the contacting section contacts and pushes the first shutter when the second shutter moves.
In addition thereto, a longitudinal direction of the first shutter may be along a longitudinal direction of the second shutter; the contacting section may be an extending section that extends towards the first shutter at one end in a transverse direction of the second shutter; the first shutter may have a projecting section that is located on a central section in the longitudinal direction of the first shutter and that projects towards the second shutter; and the first shutter may move from the first closing position to the first opening position as a result that the extending section contacts and pushes one end of the projecting section in a transverse direction of the first shutter when the second shutter moves.
In such a case, since the contacting section contacts the first shutter surely, the first shutter can surely move from the first closing position to the first opening position.
A shutter device, including:
With this shutter device, the shutter includes the opening being larger than the opening of the sealing member, and, when being located at the second position, presses the sealing member in a state where the entire edge section, of the shutter, around its opening surrounds the entire edge section, of the sealing member, around its opening. Accordingly, the circumferential section of the opening of the sealing member contacts an opposing member properly. Therefore, a gap is less likely to be formed between the sealing member and the opposing member, and it is possible to sufficiently prevent developer from spilling.
An image forming apparatus, including:
With this image forming apparatus, the shutter includes the opening being larger than the opening of the sealing member, and, when being located at the second position, presses the sealing member in a state where the entire edge section, of the shutter, around its opening surrounds the entire edge section, of the sealing member, around its opening. Accordingly, the circumferential section of the opening of the sealing member contacts an opposing member properly. Therefore, a gap is less likely to be formed between the sealing member and the opposing member, and it is possible to sufficiently prevent developer from spilling.
In addition thereto, the image forming apparatus may include two of the shutter devices; the two shutter devices may be provided adjacent to each other such that developer can move between the opening of the sealing member of one shutter device and the opening of the sealing member of the other shutter device when each of the shutters is located at the second position; and the sealing members that are pressed by their respective shutters may contact each other when the shutters of the two shutter devices are located at the second position.
In such a case, it is possible to sufficiently prevent spillage of developer that passes through between the two shutter devices.
In addition thereto, the edge sections, of the respective sealing members, around their respective openings that are pressed by their respective shutters may be sandwiched between the two shutters of the two shutter devices when the two shutters are located at the second position.
In such a case, it is possible to effectively prevent developer from spilling from between the two shutters.
In addition thereto, the two shutter devices may be a first shutter device provided to an image-forming unit that includes an image-hearing body for bearing a latent image, a containing section for containing developer, and a developer-bearing body for making the latent image borne by the image-bearing body visible using the developer as a developer image, and a second shutter device provided to a developer cartridge that can be attached to and detached from the image-forming unit, and that is for supplying the containing section with the developer.
If the two shutter devices are provided to the image-forming unit and the developer cartridge, an amount of developer passing through between the two shutter devices increases. Therefore, it is possible to more effectively achieve an effect generated by providing the shutter devices, that is, an effect that developer is sufficiently prevented from spilling.
In addition thereto, the shutter of the first shutter device may include a contacting section that contacts the shutter of the second shutter device when the shutter of the first shutter device moves from the first position to the second position; and when the shutter of the first shutter device moves from the second position to the first position, the contacting section does not have to reach a position opposite to the opening of the sealing member of the first shutter device.
In such a case, it is possible to prevent the shutter of the second shutter device from being dirtied by the contacting section of the first shutter device.
An image forming apparatus, including:
With this image forming apparatus, an advantage of some aspects of the invention can be achieved more effectively.
Outline of Image Forming Apparatus
Next, with reference to
Configuration Example of Printer 10
As shown in
The photoconductor 31 has a photoconductive layer formed on an outer peripheral surface thereof, and bears a latent image on a surface of the photoconductive layer. The photoconductor 31 is rotatable about a central axis, and rotates counterclockwise in this embodiment, as indicated by the arrow in
The charging device 32 is for charging the photoconductor 31. The exposing unit 40 is a device that forms a latent image on the charged photoconductor 31 by radiating laser beams thereon. The exposing unit 40 has a semiconductor laser, a polygon mirror, an F-θ lens, etc., and radiates modulated laser beams onto the charged photoconductor 31 according to image signals inputted by a not-shown computer such as a personal computer and a word processor.
The developing section 50 has a function of developing a latent image on the photoconductor 31 using toner that serves as an example of developer; the developing section 50 includes a toner containing section 51 that serves as an example of the containing section, a developing roller 52 that serves as an example of the developer-bearing body, a supplying roller 53, a restriction blade 54, and an agitator 56.
The toner containing section 51 is for containing toner. The developing roller 52 rotates bearing toner on the surface thereof so as to carry the toner to a developing position that is opposite the photoconductor 31. The developing roller 52 contacts the photoconductor 31, and makes a latent image borne on the photoconductor 31 visible as a toner image using toner that has been carried to the developing position (in other words, develops the latent image while contacting the photoconductor 31). The supplying roller 53 is a rotatable member that abuts against the developing roller 52; the supplying roller 53 has a function of supplying the developing roller 52 with toner contained in the toner containing section 51, and a function of stripping off from the developing roller 52 toner that remains on the developing roller 52 after development. The restriction blade 54 restricts a layer thickness of toner borne on the developing roller 52 by abutting against the developing roller 52 along an axial direction of the roller; in addition, the restriction blade 54 charges electrically toner borne on the developing roller 52. The agitator 56 has a function of stirring toner by rotation of the agitator, and a function of carrying toner contained in the toner containing section 51 to the supplying roller 53.
The toner cartridge 60 is filled with toner and is attached to the process unit 20 after the cartridge 60 is inserted into the cartridge-inserted section 22. While being attached to the unit frame 21, the toner cartridge 60 supplies the toner containing section 51 with the toner that fills the toner cartridge 60. The configuration of the toner cartridge 60 will be described later.
The transfer unit 70 is a device for transferring onto a medium a toner image that is formed on the photoconductor 31. The roller 39 is for distributing evenly on a surface of the photoconductor 31 toner (the toner image) that has not been transferred onto the medium, by abutting against the photoconductor 31.
The fusing unit 80 includes a fixing roller 80a and a pressurizing roller 80b, and is a device that heats and pressurizes the toner image transferred on the medium and that makes the image fuse with the medium so as to form a permanent image.
The control unit 100 consists of a main controller 101 and a unit controller 102, as shown in
Example of Operation of Printer 10
Next, operations of the printer 10 having the above-mentioned configuration are described. First, when image signals and control signals from a not-shown computer are inputted into the main controller 101 of the printer 10 via the interface (I/F) 112, the photoconductor 31, the developing roller 52 and the like rotate under control of the unit controller 102 according to the instructions by the main controller 101.
While rotating, the photoconductor 31 is successively charged by the charging device 32 at a charging position. With rotation of the photoconductor 31, the charged area of the photoconductor 31 reaches an exposing position, and the exposing unit 40 forms a latent image on the area according to image information. The latent image formed on the photoconductor 31 reaches the developing position with rotation of the photoconductor 31, and is developed by the developing roller 52 using toner. Thus, a toner image is formed on the photoconductor 31.
The toner image formed on the photoconductor 31 reaches a transferring position with rotation of the photoconductor 31, and is transferred by the transfer unit 70 onto a medium. Note that the medium is transported from the paper-supply cassette 92 to the transfer unit 70 via a paper-supply roller 94.
The toner image transferred onto the medium is heated and pressurized by the fusing unit 80 and is fused to the medium. The medium to which the toner image has been fused is transported to a paper-discharge tray 98 via a pair of transportation rollers 95 and a pair of paper-discharge rollers 96.
On the other hand, toner that has not been transferred onto the medium and remains on the photoconductor 31 is distributed evenly by the roller 39. The evenly-distributed toner is stripped off by the developing roller 52 at the developing position, and is collected in the toner containing section 51.
Configuration Example of Toner Cartridge 60 and Periphery thereof
Next, with reference to
Configuration of Toner Cartridge 60
First, the configuration of the toner cartridge 60 is described.
The toner cartridge 60 includes a cartridge body (hereinafter referred to as a “CRG body”) 610, an external cover 620 that serves as an example of the handle member, the CRG shutter 630 that serves as an example of the shutter (the second shutter), a cartridge seal (hereinafter referred to as a “CRG seal”) 640 that serves as an example of the sealing member, and an agitator 650.
The CRG body 610 is a container containing toner. The CRG body 610 is a cylindrical container whose cross-sectional shape is circular, as shown in
In addition, the wall section 611 is furnished with a CRG opening 612 through which toner inside the CRG body 610 can pass towards the outside of the CRG body 610. When the CRG opening 612 is exposed, toner inside the CRG body 610 can pass through the CRG opening 612 to move outside the toner cartridge 60. The CRG body 610 includes a guiding section 614 serving as a guide that linearly moves the CRG shutter 630 when the CRG shutter 630 is moving.
Besides, the CRG body 610 has ribs 616 on the outer sides, with respect to the longitudinal direction, of the wall section 611, the ribs 616 serving as an example of the protrusion that can contact the CRG shutter 630 (
Further, the CRG body 610 has a protrusion 617 on a rear surface of the body 610 on the central section in the longitudinal direction of the body 610, as shown in
The external cover 620 is a hollow cylinder, and covers the outer peripheral surface of the CRG body 610. The external cover 620 is supported so that it can rotationally move relative to the CRG body 610. The external cover 620 has a handle 621 on a circumferential surface of the cover on a central section in a longitudinal direction of the cover 620; when the handle 621 is operated by a user, etc., the external cover 620 rotationally moves.
The external cover 620 has pinion sections 622 on both ends in the longitudinal direction, the pinion sections 622 consisting of a plurality of projections 623 that are provided at regular intervals, as shown in
As shown in
The CRG seal 640 is fixed to the wall section 611 surrounding the CRG opening 612 as shown in
The CRG shutter 630 is supported so that it can linearly move relative to the CRG body 610, and opens and closes by its linear movement between the opening position (
The CRG shutter 630 is a thin metal plate whose thickness is less than a thickness of the CRG seal 640, and moves linearly with both ends of the CRG shutter 630 in its longitudinal direction contacting the guiding section 614.
The CRG shutter 630 includes a CRG shutter opening 631 that serves as an example of the opening of the shutter, and that is located on a central section in the longitudinal direction of the CRG shutter 630 and near one end in a transverse direction of the CRG shutter 630, as shown in
Besides, the CRG shutter 630 has a rack section 632 consisting of a plurality of holes 633 that are provided at regular intervals, as shown in
Further, as shown in
Further, the CRG shutter 630 includes engaging pieces 636 (
The agitator 650 is provided inside the CRG body 610 as shown in
Configuration of Cartridge-Inserted Section 22
As mentioned above, the process unit 20 has the cartridge-inserted section 22 into which the toner cartridge 60 is inserted.
As shown in
The locking hole 210 is a hole through which the hook 626 of the external cover 620 can move when the toner cartridge 60 is inserted into the cartridge-inserted section 22, and through which the hook 626 cannot move when the toner cartridge 60 is attached to the printer.
The unlocking projection portion 220 is for releasing the external cover 620 that is locked in the CRG body 610 from the CRG body 610; the unlocking projection portion 220 deforms the lever 628 of the external cover 620 by contacting the lever 628 so that the lever 628 fastened by the protrusion 617 is released from the protrusion 617.
The recess 240 serves as a guide when the toner cartridge 60 is inserted into the cartridge-inserted section 22. That is, the CRG connector 618 enters along the recess 240 so that the toner cartridge 60 is inserted into the cartridge-inserted section 22.
The through hole 250 is a hole through which the CRG connector 618 of the toner cartridge 60 can pass. The CRG connector 618 that passes through the through hole 250 contacts a connector provided on the printer body when the toner cartridge 60 is inserted into the cartridge-inserted section 22.
The inserted-section opening 260 is provided in a partitioning wall 22a that separates the toner containing section 51 and the cartridge-inserted section 22, as shown in
The inserted-section seal 270 is fixed to the partitioning wall 22a surrounding the inserted-section opening 260, and is for preventing toner from spilling from between the partitioning wall 22a and the inserted-section shutter 230. As shown in
The inserted-section shutter 230 is supported by the partitioning wall 22a so that it can linearly move, and opens and closes by linear movement between a closing position (
The inserted-section shutter 230 is a thin metal plate whose thickness is less than the thickness of the inserted-section seal 270, and moves linearly with both ends of the inserted-section shutter 230 in its longitudinal direction contacting the guiding sections 280 that are provided on the partitioning wall 22a (the longitudinal direction of the shutter 230 is along the longitudinal direction of the CRG shutter 630).
Besides, the inserted-section shutter 230 includes a projecting section 231 on a central section in the longitudinal direction of the shutter 230, and the projecting section 231 projects to a distal direction from the partitioning wall 22a (projects towards the CRG shutter 630 when the toner cartridge 60 is inserted into the cartridge-inserted section 22), as shown in
The projecting section 231 includes an inserted-section shutter opening 232 that serves as an example of the opening of the shutter. When the inserted-section shutter 230 is located at the opening position, the shutter 230 is located at a position at which the inserted-section shutter opening 232 is opposite the inserted-section seal opening 272, as shown in
Besides, the projecting section 231 has engaged holes 234 on the outer sides, with respect to the longitudinal direction, of the inserted-section shutter opening 232 (i.e., on both end sides in the longitudinal direction); the engaged hole 234 serves as an example of the engaged-hole section with which the engaging piece 636 of the CRG shutter 630 can engage.
Operation Examples of Toner Cartridge and its Periphery when Attaching/Detaching Toner Cartridge
Next, operation examples of the toner cartridge and its periphery when attaching/detaching the toner cartridge 60 are described with reference to
Note that, in
Operation Examples of Toner Cartridge and Peripheral Members when Attaching Toner Cartridge
First, operation examples of the toner cartridge 60 and its peripheral members when attaching the toner cartridge 60 to the process unit 20 are described.
1. Regarding Initial State
This section describes an initial state of the toner cartridge 60 and its peripheral members, that is, a state of the toner cartridge 60 and its peripheral members before the toner cartridge 60 is inserted into the cartridge-inserted section 22 of the process unit 20.
As shown in
Besides, as shown in
Further, some of the plurality of projections 623 that constitute the pinion section 622 engage with some of the plurality of holes 633 that constitute the rack section 632 (see
In the side of the cartridge-inserted section 22, as shown in
2. Regarding Operations until Toner Cartridge 60 is Inserted into Cartridge-Inserted Section 22
This section describes operations of the toner cartridge 60, etc. that are carried out until the toner cartridge 60 is inserted into the cartridge-inserted section 22, that is, until the state shown in
When a user, etc. grabs the handle 621 and lowers the toner cartridge 60 into the cartridge-inserted section 22, the CRG connector 618 enters along the recess 240 and the toner cartridge 60 is inserted into the cartridge-inserted section 22. When the toner cartridge 60 is inserted into the cartridge-inserted section 22, the CRG shutter 630 and the inserted-section shutter 230 are located adjacent to each other and oppose, as shown in
Besides, when the toner cartridge 60 is inserted into the cartridge-inserted section 22, the unlocking projection portion 220 releases the external cover 620 that is locked in the CRG body 610 from the CRG body 610. That is, when the toner cartridge 60 is not inserted into the cartridge-inserted section 22, the lever 628 is fastened by the protrusion 617, as shown in
Further, on the way in which the toner cartridge 60 is being inserted into the cartridge-inserted section 22, the CRG connector 618 passes through the through hole 250; when the toner cartridge 60 is completely inserted into the cartridge-inserted section 22, the CRG connector 618 contacts a connector provided on the printer body.
Furthermore, on the way in which the toner cartridge 60 is being inserted into the cartridge-inserted section 22, the hook 626 moves through the locking hole 210; when the toner cartridge 60 is completely inserted into the cartridge-inserted section 22, the hook 626 is in a state where it can still move in the locking hole 210, as shown in
When the toner cartridge 60 is being inserted into the cartridge-inserted section 22, the CRG shutter 630 is resting at the closing position, and the engaging piece 636 is not pushed by the rib 616 (the flat section 616b), as shown in
3. Regarding Operations when Handle is Operated
This section describes operations of the toner cartridge 60, etc. that are carried out until the CRG shutter 630 located at the closing position reaches the opening position, that is, until the state shifts from that shown in
After the lever 628 that has been fastened by the protrusion 617 is released from the protrusion 617 by the unlocking projection portion 220, a user, etc. pushes the handle 621 in a predetermined direction (the direction indicated by the arrow in
In rotational movement of the external cover 620, the CRG shutter 630 moves linearly. In other words, force exerted as a result of the user, etc. pushing the handle 621 is transmitted to the external cover 620 as rotational-movement force that rotationally moves the external cover 620. The external cover 620 moves rotationally with the rack section 632 and the pinion section 622 engaging with each other so that the rotational-movement force is converted into, and is transmitted to the CRG shutter 630 as, linear-movement force that linearly moves the CRG shutter 630, through the pinion section 622 and the rack section 632. Accordingly, the CRG shutter 630 moves linearly by the linear-movement force while contacting the guiding section 614. As mentioned above, the rack section 632 and the pinion section 622 have a function of a conversion mechanism that converts the rotational-movement force into the linear-movement force.
A user, etc. pushes the handle 621 from the position shown in
Further, when the CRG shutter 630 linearly moves, the CRG contacting section 634 of the CRG shutter 630 makes the inserted-section shutter 230 moves linearly with the shutter 230 contacting the guiding section 280.
In other words, when the CRG shutter 630 is located at the closing position, the CRG contacting section 634 does not contact the inserted-section shutter 230, as shown in
Further, since the inserted-section shutter 230 linearly moves as a result of being pushed by the CRG contacting section 634, a time when the CRG shutter 630 reaches the opening position is the same as a time when the inserted-section shutter 230 reaches the opening position. When the inserted-section shutter 230 linearly moves from the closing position to the opening position, the engaging piece 636 of the CRG shutter 630 is elastically deformed by being pressed by the flat section 616b of the rib 616, but the engaging piece 636 does not engage with (does not contact) the engaged hole 234 of the inserted-section shutter 230, as shown in
Furthermore, movement of the CRG shutter 630 from the closing position to the opening position makes the CRG seal opening 642 be exposed through the CRG shutter opening 631 that is opposite the CRG seal opening 642, as shown in
As shown in
Further, when a user, etc. presses and moves the handle 621 from the position shown in
In other words, when the handle 621 is located at the position shown in
As mentioned above, the handle 621 is operated and the external cover 620, etc. moves so that the toner cartridge 60 becomes attached to the process unit 20. After the toner cartridge 60 is attached, the agitator 650 inside the CRG body 610 rotates, and thereby, toner inside the CRG body 610 is supplied to the toner containing section 51 via the CRG opening 612 and the inserted-section opening 260.
Operation Examples of Toner Cartridge and its Periphery when Detaching Toner Cartridge
Next, operation examples of the toner cartridge 60 and its peripheral members when detaching the toner cartridge 60 from the process unit 20 are described.
1. Regarding Initial State
This section describes an initial state of the toner cartridge 60 and its peripheral members, that is, a state of the toner cartridge 60 and its peripheral members when the toner cartridge 60 is attached to the process unit 20.
When the toner cartridge 60 is attached to the process unit 20, the CRG shutter 630 and the inserted-section shutter 230 are resting at their respective opening positions and opposes each other (adjacent to each other), as shown in
Further, as shown in
The CRG seal 640 is compressed between the CRG shutter 630 and the wall section 611, and the CRG seal opening 642 is exposed. In a similar manner, the inserted-section seal 270 is compressed between the inserted-section shutter 230 and the partitioning wall 22a, and the inserted-section seal opening 272 is exposed. Further, as shown in
Since the hook 626 of the external cover 620 is located at the position shown in
Further, since the unlocking projection portion 220 deforms the lever 628 as shown in
2. Regarding Operations of Toner Cartridge, etc. in Closing Movement of Shutter
This section describes operations of the toner cartridge 60, etc. that are carried out until the CRG shutter 630 located at the opening position reaches the closing position, that is, until the state shifts from that shown in
Since the lever 628 is not fastened by the protrusion 617, a user, etc. pushes (operates) the handle 621 in a predetermined direction (the direction indicated by the arrow in
With rotational movement of the external cover 620, the CRG shutter 630 moves linearly. In other words, force exerted as a result of the user, etc. pushing the handle 621 is transmitted to the external cover 620 as rotational-movement force that rotationally moves the external cover 620. The external cover 620 moves rotationally with the rack section 632 and the pinion section 622 engaging with each other so that the rotational-movement force is converted into, and is transmitted to the CRG shutter 630 as, linear-movement force that linearly moves the CRG shutter 630, through the pinion section 622 and the rack section 632. Accordingly, the CRG shutter 630 moves linearly by the linear-movement force while contacting the guiding section 614.
A user, etc. pushes the handle 621 from the position shown in
Further, when the CRG shutter 630 linearly moves, the engaging piece 636 of the CRG shutter 630 makes the inserted-section shutter 230 move linearly with the shutter 230 contacting the guiding section 280.
That is, when the CRG shutter 630 is located at the opening position, the engaging piece 636 is elastically deformed (projects towards the inserted-section shutter 230) by being pressed by the flat section 616b of the rib 616, but the engaging piece 636 does not engage with (does not contact) the engaged hole 234 (note that the engaging piece 636 enters into the engaged hole 234), as shown in
When the inserted-section shutter 230 reaches the closing position, the CRG shutter 630 does not reach the closing position. Therefore, after the inserted-section shutter 230 reaches the closing position, the CRG shutter 630 can further move linearly. Further linear movement of the CRG shutter 630 makes the CRG shutter 630 reach the closing position shown in
When the CRG shutter 630 (the inserted-section shutter 230) linearly moves from the opening position to the closing position, the one-end contacting section 235a of the inserted-section shutter 230 does not contact the CRG contacting section 634 of the CRG shutter 630, as shown in
Further, the CRG shutter 630 moves from the opening position to the closing position so that the CRG seal opening 642 (the CRG opening 612) is covered by the CRG shutter 630 (
A user, etc. pushes the handle 621 from the position shown in
In other words, when the handle 621 is located at the position shown in
3. Regarding Operations of Toner Cartridge, etc. when Detaching Toner Cartridge
This section describes operations of the toner cartridge 60, etc. when detaching the toner cartridge 60 whose CRG shutter 630 is resting at the closing position from the cartridge-inserted section 22.
When a user, etc. grabs the handle 621 and lifts up the toner cartridge 60 that is inserted into the cartridge-inserted section 22, the toner cartridge 60 is detached from the process unit 20. That is, since, when lifting up the toner cartridge 60, the hook 626 is located at the position shown in
When the toner cartridge 60 is detached, the external cover 620 is locked so that it cannot rotationally move relative to the CRG body 610. That is, when the toner cartridge 60 is inserted into the cartridge-inserted section 22, the unlocking projection portion 220 deforms the lever 628 by contacting the lever 628 so that the protrusion 617 does not fasten the lever 628, as shown in
Regarding Effectiveness of Toner Cartridge 60, etc. according to This Embodiment
As mentioned above, the developer cartridge (the toner cartridge 60) according to this embodiment includes: the container (the CRG body 610) for containing developer (toner); the shutter (the CRG shutter 630) that is supported so that the shutter can linearly move relative to the CRG body 610, and that opens and closes by moving linearly; the handle member (the external cover 620) that is supported so that the handle member can rotationally move relative to the CRG body 610, and that includes the handle 621; and the conversion mechanism (the rack section 632 and the pinion section 622) by which rotational-movement force that rotationally moves the external cover 620 is converted into linear-movement force that linearly moves the CRG shutter 630. Accordingly, this allows the CRG shutter 630 to open and close properly in a simple configuration. A detail thereof is described hereinbelow.
As in the preceding, in order to move toner inside the CRG body 610 to the outside thereof (specifically, to supply the toner containing section 51 with toner inside the CRG body 610), it is necessary to properly open and close the CRG shutter 630. On the other hand, if a complicated mechanism is provided in order to properly open and close the CRG shutter 630, there is a risk that it induces increase of the number of components.
In contrast, in this embodiment, as shown in
Thus, the rotational-movement force that rotationally moves the external cover 620 is utilized through the conversion mechanism and linearly moves the CRG shutter 630 so that the shutter 630 opens and closes. Accordingly, this allows the CRG shutter 630 to open and close properly in a simple configuration.
Besides, in this embodiment, as shown in
Further, as mentioned above, the second shutter (the CRG shutter 630) of the image forming apparatus according to this embodiment (the printer 10) includes the operating section (the engaging piece 636) that engages with the first shutter (the inserted-section shutter 230) and operates the inserted-section shutter 230, and whose engagement with the inserted-section shutter 230 is disengaged at a certain point during closing movement from the second opening position (the opening position of the CRG shutter 630) at which the CRG shutter 630 exposes the second opening (the CRG seal opening 642) to the second closing position (the closing position of the CRG shutter 630) at which the CRG shutter 630 covers the CRG seal opening 642, as shown in
As in the preceding, as a configuration which to open and close the inserted-section shutter 230 and the CRG shutter 630, two configurations are proposed: one is a configuration in which the inserted-section shutter 230 and the CRG shutter 630 each move and open/close independently, and the other is a configuration in which one of the two shutters moves and opens/closes in conjunction with movement of the other shutter.
However, the former of the above-mentioned two configurations is likely to induce increase of the number of components. On the other hand, in the latter configuration, movement of the inserted-section shutter 230 and the CRG shutter 630 is likely to be restricted. For example, assume that one of the two shutters presses the other one and moves from its opening position to its closing position. In such a case, the other shutter is pressed by the one shutter and thereby moves from its opening position to its closing position. Therefore, the two shutters stops simultaneously, and this restricts movement of the inserted-section shutter 230 and the CRG shutter 630.
In contrast, in this embodiment, as shown in
In such a case, the engaging piece 636 that engages with the inserted-section shutter 230 is disengaged from the inserted-section shutter 230 at a certain point during closing movement of the CRG shutter 630 (the inserted-section shutter 230 reaches the closing position immediately before the engaging piece 636 is disengaged). Therefore, after the inserted-section shutter 230 reaches the closing position, the CRG shutter 630 can further move (in other words, the inserted-section shutter 230 and the CRG shutter 630 each stop non-simultaneously). Accordingly, it is possible to move the inserted-section shutter 230 and the CRG shutter 630 to their respective appropriate closing positions and to close the shutters in a simple configuration without increasing the number of components.
Further, in this embodiment in which the engaging piece 636 is provided on the CRG shutter 630 of the toner cartridge 60, there is especially effectiveness in that a time when the inserted-section shutter 230 reaches the closing position is different from a time when the CRG shutter 630 reaches the closing position. That is, when the inserted-section shutter 230 is located at the closing position, the engaging piece 636 enters into and engages with the engaged hole 234 as shown in
In the above-mentioned embodiment, the operating section that has engaged with the inserted-section shutter 230 is disengaged from the inserted-section shutter 230 at a certain point during the above-mentioned closing movement of the CRG shutter 630. However, the invention is not limited thereto. For example, the operating section that has engaged with the inserted-section shutter 230 may be disengaged from the inserted-section shutter 230 at a certain point during opening movement of the CRG shutter 630 from the second closing position to the second opening position. In such a case, it is possible to move the inserted-section shutter 230 and the CRG shutter 630 to their respective appropriate opening positions and to open the shutters in a simple configuration.
The operating section engaging with the inserted-section shutter 230 may be disengaged from the inserted-section shutter 230 during both of the above-mentioned opening movement and closing movement of the CRG shutter 630. In such a case, it is possible to move the inserted-section shutter 230 and the CRG shutter 630 to their respective appropriate opening positions and closing positions and to open/close the shutters in a simple configuration. Accordingly, if the operating section engaging with the inserted-section shutter 230 is disengaged from the inserted-section shutter 230 at a certain point during at least either one of the above-mentioned opening movement and closing movement of the CRG shutter 630, it is possible to properly open/close the inserted-section shutter 230 and the CRG shutter 630 in a simple configuration.
Furthermore, as mentioned above, the shutter device according to this embodiment (the second shutter device is described below as an example) includes: the sealing member (the CRG seal 640) that includes an opening through which developer (toner) can pass, and that is for preventing toner from spilling; and the shutter (the CRG shutter 630) that includes the opening (the CRG shutter opening 631) being larger than the opening (the CRG seal opening 642) of the CRG seal 640, and that can move between the first position (the closing position) at which the CRG shutter 630 covers the CRG seal opening 642 and the second position (the opening position) at which the CRG shutter 630 exposes the CRG seal opening 642. Besides, when the CRG shutter 630 is located at the opening position, the CRG shutter 630 presses the CRG seal 640 in a state where the entire edge section 631a, of the CRG shutter 630, around the opening (the CRG shutter opening 631) surrounds the entire edge section 642a around the CRG seal opening 642. Accordingly, it is possible to sufficiently prevent toner from spilling. A detail thereof is described hereinbelow.
As in the preceding, when the CRG shutter 630 opens (in other words, the CRG shutter 630 is located at the opening position), there is a risk that the CRG seal 640 cannot sufficiently prevent toner from spilling.
A specific explanation is given hereinbelow with reference to a comparison example shown in
As shown in
In contrast, in this embodiment, as shown in
In the above description, the second shutter device (the CRG seal 640 and the CRG shutter 630) is described as an example of the shutter device, but a similar effect is also achieved on the first shutter device (the inserted-section seal 270 and the inserted-section shutter 230). That is, as shown in
Other Embodiments
The toner cartridge, etc. according to the invention is described above based on the above-mentioned embodiment. However, the above-mentioned embodiment of the invention is provided for facilitating the understanding of the invention, and is not to be interpreted as limiting the invention. As a matter of course, the invention can be altered and improved without departing from the gist thereof and the invention includes equivalents thereof.
In the above-mentioned embodiment, a monochrome printer having one photoconductor 31 and one developing section 50 was described as an example of the image forming apparatus, but the invention is not limited thereto. For example, the invention is also applicable to a color printer (a so-called tandem-engine printer) having photoconductors 31 and developing sections 50 that are dedicated to and independent among each color. In such a case, the toner cartridge 60 is provided for each color; each toner cartridge 60 is attached to and detached from its own predetermined cartridge-inserted section, and toner inside the toner cartridge 60 is supplied to a developing section corresponding to each toner cartridge 60.
Besides, in the above-mentioned embodiment, the toner cartridge 60 is attached to and detached from the process unit 20 that is mounted on the printer body, but the invention is not limited thereto. For example, the process unit 20 may be a cartridge that can be attached to and detached from the printer body, and the toner cartridge 60 may be attached to and detached from this process unit 20 while this process unit 20 is detached from the printer body. In such a case, the process unit 20 having the toner cartridge 60 attached thereto is attached to and detached from the printer body.
Further, in the above-mentioned embodiment, as shown in
However, if the conversion mechanism includes the rack section 632 and the pinion section 622, it is possible to easily convert the rotational-movement force that rotationally moves the external cover 620 into the linear-movement force that linearly moves the CRG shutter 630. Accordingly, the above-mentioned embodiment is more preferable.
Further, in the above-mentioned embodiment, the CRG shutter 630 is made of metal, and the external cover 620 is made of resin. Beside, as shown in
However, if the CRG shutter 630 is made of metal, holes are easier to be processed than projections. Therefore, if the rack section consists of holes, it is possible to easily form the rack section. Accordingly, the above-mentioned embodiment is more preferable.
Further, in the above-mentioned embodiment, as shown in
However, if the toner cartridge 60 includes the handle-member locking section (the protrusion 617 and the lever 628) and the process unit 20 includes the unlocking projection portion 220, it is possible to realize a simple configuration which can surely prevent the external cover 620 from rotating incorrectly (prevent the CRG shutter 630 from opening incorrectly) when the toner cartridge 60 is not inserted into the cartridge-inserted section 22. Accordingly, the above-mentioned embodiment is more preferable.
Further, in the above-mentioned embodiment, as shown in
However, if the handle-member locking section includes the lever 628 and the protrusion 617, and if the unlocking section is the projection portion, the lever 628 can be easily fastened by the protrusion 617 and the fastening of the lever 628 by the protrusion 617 can be easily released. Therefore, it is possible to realize a simple configuration that can lock the external cover 620 to the CRG body 610 and release the locking between the external cover 620 and the CRG body 610. Accordingly, the above-mentioned embodiment is more preferable.
Further, in the above-mentioned embodiment, the toner cartridge 60 is attached to the printer body (the process unit 20) by rotationally moving the external cover 620 to a predetermined position (the position shown in
However, if the container-locking section includes the hook 626 and the locking hole 210, it is possible to realize a simple configuration which can lock the CRG body 610 to the cartridge-inserted section 22 and release the locking between the CRG body 610 and the cartridge-inserted section 22. Accordingly, the above-mentioned embodiment is more preferable.
Further, in the above-mentioned embodiment, when the external cover 620 rotationally moves to the predetermined position (the position shown in
However, if, when the toner cartridge 60 gets attached to the printer body, the CRG shutter 630 opens and the CRG body 610 gets locked to the cartridge-inserted section 22, this reduces burden of a user, etc. who has to operate units after the attaching. Therefore, it is possible to realize a convenient printer 10. Accordingly, the above-mentioned embodiment is more preferable.
Further, in the above-mentioned embodiment, as shown in
However, if the first opening and the first shutter are provided to the process unit 20, and if the second opening and the second shutter are provided to the toner cartridge 60, when, for example, the toner cartridge 60 contains a small amount of toner, the toner cartridge 60 is frequently attached and detached so that the two shutters frequently opens and closes. In such a case, if the engaging piece 636 according to this embodiment is provided, an effect that the two shutters can properly open and close in a simple configuration is achieved more effectively. Accordingly, the above-mentioned embodiment is more preferable.
Further, in the above-mentioned embodiment, as shown in
However, if the engaging piece 636 engages with the inserted-section shutter 230 by elastic deformation of the engaging piece 636 and the engaging piece 636 that engages with the inserted-section shutter 230 is disengaged from the inserted-section shutter 230 by elastic deformation of the engaging piece 636, it is possible to realize a simple configuration in which the engaging piece 636 can engage with the inserted-section shutter 230 and the engaging piece 636 engaging with the inserted-section shutter 230 can be disengaged from the inserted-section shutter 230. Accordingly, the above-mentioned embodiment is more preferable.
Further, in the above-mentioned embodiment, the longitudinal direction of the inserted-section shutter 230 is along the longitudinal direction of the CRG shutter 630; the engaging piece 636 is an elastic metal piece that is located near both ends of the CRG shutter 630 in its longitudinal direction, as shown in
However, in the event that the engaging piece 636 is an elastic metal piece, that the inserted-section shutter 230 has the engaged hole 234 with which the engaging piece 636 can engage, and that the engaging piece 636 engages with the engaged hole 234 as a result of being pushed by the rib 616 (specifically, the flat section 616b), it is possible to realize a simple configuration in which the engaging piece 636 can engage with the inserted-section shutter 230. Accordingly, the above-mentioned embodiment is more preferable.
Further, in the above-mentioned embodiment, as shown in
Further, in the above-mentioned embodiment, as shown in
For example, it is also acceptable that the engaging piece 636 engages with the inserted-section shutter 230 when the CRG shutter 630 is located at the opening position, and that the engaging piece 636 keeps engaging with the CRG shutter 630 until a certain point in midstream of the closing movement of the CRG shutter 630 and moves the inserted-section shutter 230 from the opening position to the closing position.
Further, in the above-mentioned embodiment, as shown in
However, if the inserted-section shutter 230 has the projecting section 231, and if the inserted-section shutter 230 moves as a result that the extending section (the CRG contacting section 634) contacts and pushes the projecting section 231 when the CRG shutter 630 moves, the CRG contacting section 634 contacts the inserted-section shutter 230 surely. Therefore, the inserted-section shutter 230 can surely move from the closing position to the opening position. Accordingly, the above-mentioned embodiment is more preferable.
Further, in the above-mentioned embodiment, as shown in
If, when the CRG contacting section 634 moves the inserted-section shutter 230 from the closing position to the opening position (opening movement), the engaging piece 636 engages with the inserted-section shutter 230 so as to interfere with the opening movement, the CRG contacting section 634 contacts insufficiently the inserted-section shutter 230. As a result thereof, there is a risk that the CRG contacting section 634 does not sufficiently function to cause the inserted-section shutter 230 to carry out opening movement. In a similar manner, if, when the engaging piece 636 moves the inserted-section shutter 230 from the opening position to the closing position (closing movement), the CRG contacting section 634 contacts the inserted-section shutter 230 so as to interfere with the closing movement, the engaging piece 636 engages insufficiently with the inserted-section shutter 230. As a result thereof, there is a risk that the engaging piece 636 does not sufficiently function to cause the inserted-section shutter 230 to carry out closing movement. In contrast, if, like the above-mentioned embodiment, the engaging piece 636 does not engage with the inserted-section shutter 230 in the opening movement and the CRG contacting section 634 does not contact the inserted-section shutter 230 in the closing movement, the CRG contacting section 634 and the engaging piece 636 can each function sufficiently. Accordingly, the above-mentioned embodiment is more preferable.
Further, in the above-mentioned embodiment, as shown in
For example, the printer 10 does not have to include two adjacent shutter devices, that is, a shutter device may oppose an opposing member including an opening, and, when a shutter of the shutter device opens, a sealing member that is exposed at this time may contact the opposing member.
Further, in the above-mentioned embodiment, as shown in
However, if, when the two shutters (the CRG shutter 630 and the inserted-section shutter 230) are located at the opening position, the edge section 642a of the CRG seal 640 and the edge section 272a of the inserted-section seal 270 are sandwiched between the two shutters, it is possible to effectively prevent toner from spilling from between the two shutters. Accordingly, the above-mentioned embodiment is more preferable.
Further, in the above-mentioned embodiment, as shown in
However, if the two shutter devices are provided to the process unit 20 and the toner cartridge 60 that supplies the process unit 20 with toner, an amount of toner passing through between the two shutter devices increases. Therefore, it is possible to more effectively achieve an effect generated by providing the above-mentioned shutter devices, that is, an affect that toner is sufficiently prevented from spilling. Accordingly, the above-mentioned embodiment is more preferable.
Further, in the above-mentioned embodiment, as shown in
If, when the inserted-section shutter 230 moves from the opening position to the closing position, the contacting section reaches the position opposite to the inserted-section seal opening 272, there is a risk that the CRG shutter 630 becomes dirtied as a result that toner near the inserted-section seal opening 272 adheres to the contacting section and the contacting section contacts the CRG shutter 630. In contrast, if, when the inserted-section shutter 230 moves from the opening position to the closing position, the contacting section (the one-end contacting section 235a) does not reach the position opposite to the inserted-section seal opening 272, toner near the inserted-section seal opening 272 is less likely to adhere to the one-end contacting section 235a. Therefore, it is possible to prevent the CRG shutter 630 from being dirtied by the toner. Accordingly, the above-mentioned embodiment is more preferable.
Further, in the above-mentioned embodiment, the inserted-section seal 270 and the CRG seal 640 are made of urethane foam; each of the inserted-section shutter 230 and the CRG shutter 630 is a metal plate whose thickness is less than a thickness of each of the inserted-section seal 270 and the CRG seal 640. However, the invention is not limited thereto. For example, the inserted-section shutter 230 and the CRG shutter 630 may be resin plates.
However, if the inserted-section shutter 230 and the CRG shutter 630 are both metal plates, their thickness can made be less than in a case where the shutters are resin plates. Therefore, when the two shutters open, the inserted-section seal 270 and the CRG seal 640 are more likely to contact each other, so that it is possible to effectively prevent toner from spilling. Accordingly, the above-mentioned embodiment is more preferable.
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