Image forming device

Abstract

To provide an image forming apparatus including a new configuration that can regulate removal of a cartridge.SOLUTION: An image forming apparatus has: an apparatus main body; a cartridge that has a part to be locked and is removably mounted in the apparatus main body; an operation part that is operated when the cartridge is removed from the apparatus main body; and removal regulation means that is provided in the apparatus main body and regulates the removal of the cartridge. The removal regulation means has a locking part that is configured to lock the part to be locked, the locking part regulating the cartridge from moving in a removal direction in which the cartridge is removed from the apparatus main body, a regulation member that is movable to a first position to regulate the operation of the operation part to release the locking between the part to be locked and the locking part and a second position to allow the operation, and an actuator that moves the regulation member between the first position and the second position.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present invention relates to an image forming apparatus that forms an image on a recording material. [Background technology]

[0002] 2. Description of the Related Art In image forming devices such as printers, copiers, and multifunction devices, a toner cartridge that supplies toner (developer) is detachably attached, and when the toner remaining in the toner cartridge becomes low, the cartridge is replaced by a user or a service representative.

[0003] Patent Document 1 describes a method for preventing premature cartridge replacement by restricting access to a toner cartridge by locking the opening / closing cover of the image forming device body when a predetermined amount of toner remains in the toner cartridge. Patent Document 2 describes a method for providing an openable / closable door at each of the removal openings of multiple toner cartridges, and unlocking the corresponding door only for toner cartridges with less than a predetermined amount of toner remaining, thereby enabling cartridge replacement. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Publication No. 2020-115161 [Patent Document 2] Japanese Patent Application Laid-Open No. 2010-256557 Summary of the Invention [Problem to be solved by the invention]

[0005] However, the configurations of the above documents require an openable door that covers the toner cartridge, a mechanism for locking this door, and a sensor for detecting whether the door is open or closed in order to restrict removal of the toner cartridge.

[0006] SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide an image forming apparatus having a new configuration that can restrict removal of a cartridge. [Means for solving the problem]

[0007] One aspect of the present invention is a device comprising: before A cartridge removably mounted on the device body. And before The cartridge is removed from the main body of the device. And a locked portion is provided Operation section Cartridge having and a removal restriction means provided in the device main body for restricting removal of the cartridge, wherein the removal restriction means is a locking portion configured to lock the locked portion and restricts movement of the cartridge in the removal direction in which it is removed from the device main body, a restriction member movable to a first position that restricts operation of the operating portion to release the lock between the locked portion and the locking portion, and a second position that allows the operation, and an actuator that moves the restriction member between the first position and the second position.

[0008] Another aspect of the present invention is An image forming apparatus comprising: an apparatus main body; a cartridge having an engaged portion and removably mounted to the apparatus main body, the cartridge having an operation portion that is operated when the cartridge is removed from the apparatus main body; and a removal restricting means that is provided in the apparatus main body and restricts removal of the cartridge, wherein the removal restricting means is a locking portion configured to lock the engaged portion and restricts movement of the cartridge in a removal direction in which the cartridge is removed from the apparatus main body; the locking portion is provided so as to be movable between a locking position where the locking portion overlaps with the locked portion as viewed in the removal direction and an unlocking position where the locking portion does not overlap with the locked portion as viewed in the removal direction, and the locking portion comes into contact with the operating portion and moves from the locking position to the unlocking position when the operating portion is operated; The image forming apparatus is characterized by the above.

[0009] Yet another aspect of the present invention is an image forming apparatus having an apparatus main body, a cartridge having an engaged portion and removably mounted to the apparatus main body, an operation unit provided in the apparatus main body, operated when the cartridge is removed from the apparatus main body and provided with an engaging portion, and a removal restricting means provided in the apparatus main body for restricting removal of the cartridge, wherein the removal restricting means is a locking portion configured to lock the engaged portion, the locking portion restricting movement of the cartridge in a removal direction in which the cartridge is removed from the apparatus main body, a restricting member movable to a first position that restricts operation of the operation unit for releasing the engagement between the engaged portion and the engaging portion and a second position that allows the operation, and an actuator that moves the restricting member between the first position and the second position, wherein the engaging portion is configured to move from an engaged position where it overlaps with the engaged portion as viewed in the removal direction to an unlocked position where it does not overlap with the engaged portion as viewed in the removal direction in response to the operation of the operation unit; The image forming apparatus is characterized by the above.

[0010] Yet another aspect of the present invention is an image forming apparatus having an apparatus main body; a cartridge having an engaged portion and removably mounted to the apparatus main body; a pulling member provided in the apparatus main body and configured to engage with the engaged portion during the process of mounting the cartridge to the apparatus main body and pull the cartridge to a predetermined mounting position in the apparatus main body; and a removal restricting means for restricting removal of the cartridge, wherein the removal restricting means has a first position for restricting release of an engagement state between the engaged portion and the pulling member, and a second position for allowing release of the engagement state. and a regulating member movable to a second position where the cartridge is inserted into the cartridge holder, and an actuator that moves the regulating member between the first position and the second position, wherein the retracting member is rotatable between a first angle where the retracting member engages with the engaged portion to hold the cartridge at the mounted position, and a second angle where the retracting member disengages from the engaged portion, and the regulating member, when located at the first position, regulates the retracting member from rotating from the first angle to the second angle, and when located at the second position, allows the retracting member to rotate from the first angle to the second angle. The image forming apparatus is characterized by the above. [Effects of the Invention]

[0012] According to the present invention, it is possible to provide an image forming apparatus having a new configuration capable of restricting removal of a cartridge. [Brief explanation of the drawings]

[0013] [Figure 1] 1 is a schematic diagram of an image forming apparatus according to a first embodiment. [Figure 2] FIG. 1 is a perspective view of an image forming apparatus according to a first embodiment. [Figure 3] 3A to 3C are perspective views of a cartridge mounting portion according to the first embodiment. [Figure 4] 1A and 1B are perspective views of a locking mechanism according to a first embodiment. [Figure 5] 10A to 10C are perspective views of a cartridge mounting portion according to a second embodiment. [Figure 6] 10A to 10C are cross-sectional views of a locking mechanism according to a second embodiment. [Figure 7] 10A to 10C are perspective views of a cartridge mounting portion according to a third embodiment. [Figure 8] 10A and 10B are cross-sectional views of a locking mechanism according to a third embodiment. [Figure 9] 10A to 10C are cross-sectional views of a locking mechanism according to a fourth embodiment. [Figure 10] 10A to 10C are cross-sectional views of a locking mechanism according to a fifth embodiment. [Figure 11] 13A to 13C are perspective views of a cartridge mounting portion according to a sixth embodiment. [Figure 12] 13A to 13C are cross-sectional views of a cover opening / closing mechanism according to a sixth embodiment. [Figure 13] 13A and 13B are perspective views of a cartridge mounting portion according to a seventh embodiment. [Figure 14] 13A and 13B are perspective views of a locking mechanism according to a seventh embodiment. [Figure 15] FIG. 1 is a block diagram showing a configuration of an image forming apparatus according to a first embodiment. [Figure 16] 4 is a flowchart showing a control method of the image forming apparatus according to the first embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0014] Hereinafter, embodiments of the present disclosure will be described with reference to the drawings. [Example]

[0015] A first embodiment of the present disclosure will be described. Fig. 1 is a schematic diagram showing a cross-sectional configuration of an image forming apparatus 100 according to this embodiment as seen from the front side. The image forming apparatus 100 is a printer that forms a color image on a sheet S by an electrophotographic process based on image information input from an external computer. As the sheet S, which is the recording material (recording medium), a variety of sheet materials of different sizes and materials can be used, including paper such as plain paper and cardboard, surface-treated sheet materials such as plastic film, cloth, and coated paper, and sheet materials of special shapes such as envelopes and index paper.

[0016] (Outline of image forming device) An overview of an image forming apparatus 100 will be described using Figure 1. The image forming apparatus 100 has an apparatus main body 100B equipped with an electrophotographic image forming unit 100A, and toner cartridges 1Y, 1M, 1C, and 1K as multiple cartridges each removably (detachably) mounted in the apparatus main body 100B. Note that the apparatus main body 100B in this embodiment refers to the portion of the image forming apparatus 100 excluding the toner cartridges 1Y, 1M, 1C, and 1K.

[0017] The image forming unit 100A includes four process cartridges PY, PM, PC, and PK, a laser scanner 103, an intermediate transfer belt 102, a primary transfer roller 106, and a secondary transfer roller 105.

[0018] The four process cartridges PY, PM, PC, and PK have substantially the same configuration, except that the colors of toner contained in the developing devices 104 are different from one another. That is, each of the process cartridges PY to PK has a photosensitive drum 101 as an image carrier, a developing device 104 as developing means, and a charging device and cleaning device (not shown). The photosensitive drum 101 is an electrophotographic photosensitive member formed in a drum (cylindrical) shape, and rotates while carrying an electrostatic latent image and a toner image. The developing device 104 has a developer container (container) that contains toner as a developer, and a developing roller that carries the toner and supplies it to the photosensitive drum 101. The process cartridges PY, PM, PC, and PK are image forming units that form monochrome toner images on the photosensitive drum 101 using yellow, magenta, cyan, and black toner, respectively.

[0019] The toner cartridges 1Y to 1K contain yellow, magenta, cyan, and black toner, respectively, as developers to be replenished to the developing device 104. In other words, the multiple toner cartridges 1Y to 1K correspond to the multiple developing devices 104. When attached to the apparatus main body 100B, the toner cartridges 1Y to 1K are connected (communicated) with the corresponding developing device 104 via a replenishment device (hopper) provided in the apparatus main body 100B.

[0020] The developer contained in the developing device 104 may be a two-component developer containing toner and carrier, or may be a one-component developer mainly consisting of toner. The developer contained in the toner cartridges 1Y to 1K may be composed of toner only, or may be toner mixed with a small amount of carrier.

[0021] The intermediate transfer belt 102 is an endless intermediate transfer body. The intermediate transfer belt 102 is stretched around multiple rollers so as to contact the photosensitive drums 101 of the process cartridges PY to PK, and is driven to rotate counterclockwise in the figure. Four primary transfer rollers 106 are disposed in positions facing the photosensitive drums 101 of the process cartridges PY to PK, with the intermediate transfer belt 102 sandwiched between them. The secondary transfer roller 105 is disposed in a position facing one of the rollers (inner secondary transfer roller) that stretch the intermediate transfer belt 102, with the intermediate transfer belt 102 sandwiched between them. A nip portion between the intermediate transfer belt 102 and the secondary transfer roller 105 forms a transfer portion (secondary transfer portion) where an image (toner image) is transferred to the sheet S. The process cartridges PY to PK are disposed below the intermediate transfer belt 102, and a laser scanner 103 serving as exposure means is disposed below the process cartridges PY to PK.

[0022] The image forming apparatus 100 also includes a fixing device 111 as a fixing means. The fixing device 111 is a thermal fixing device having, for example, a fixing roller, a pressure roller pressed against the fixing roller, and a halogen lamp as a heating means for heating the toner image. The configuration is not limited to the above, and may be such that, for example, a ceramic heater is disposed in the internal space of a flexible cylindrical film, and the toner image is thermally fixed by the film heated by non-radiant heat from the ceramic heater.

[0023] Furthermore, the image forming apparatus 100 is provided with a mechanism for transporting the sheets S one by one and supplying them to the image forming unit 100A. Specifically, the apparatus is provided with a cassette 107 as a stacking unit (storage unit) on which the sheets S are stacked and stored, a pickup roller 108 that picks up the sheets S from the cassette 107, and a separation roller pair 109 that separates and transports the sheets S one by one. Also provided are a registration roller pair 110 that transports the sheets S fed from the cassette 107 to a secondary transfer unit, and a discharge roller pair 112 that discharges the sheets S that have passed through the secondary transfer unit and the fixing device 111 to the outside of the apparatus main body 100B.

[0024] An outline of the image forming operation by the image forming apparatus 100 will be described below. When an instruction to form an image (print job) is input to the image forming apparatus 100, the control unit of the image forming apparatus 100 executes the image forming operation based on the image information provided when the job was input. First, the photosensitive drums 101 and intermediate transfer belts 102 of each process cartridge PY to PK start to be driven, and the surfaces of the photosensitive drums 101 are uniformly charged by the charging devices. The laser scanner 103 modulates laser light based on a signal (video signal) generated and transmitted based on the image information, and irradiates the photosensitive drums 101 with the laser light. As a result, electrostatic latent images corresponding to monochrome images of each color are formed on each photosensitive drum 101. These electrostatic latent images are developed using toners of the respective colors housed in the developing devices 104, thereby forming monochrome toner images on the photosensitive drums 101.

[0025] The single-color toner image formed on the photosensitive drum 101 is primarily transferred onto the intermediate transfer belt 102 by the primary transfer roller 106. At this time, the primary transfer is performed at a synchronized timing so that the single-color toner images are superimposed on each other on the intermediate transfer belt 102, thereby forming a full-color toner image on the intermediate transfer belt 102. This toner image is carried on the intermediate transfer belt 102 and transported to a secondary transfer unit.

[0026] In parallel with the creation of a toner image in the image forming unit 100A, a sheet S is picked up from a cassette 107 by a pickup roller 108, and is frictionally separated by a separation roller pair 109 and fed one by one. A registration roller pair 110 corrects skew of the sheet S fed from the separation roller pair 109 and then conveys the sheet S to a secondary transfer unit. At this time, the drive timing and drive speed of the registration roller pair 110 are controlled so that the timing when the toner image on the intermediate transfer belt 102 reaches the secondary transfer unit and the timing when the sheet S enters the secondary transfer unit are synchronized. This allows image registration in the sheet conveyance direction (sub-scanning direction) for the sheet S. Then, when the sheet S passes through the secondary transfer unit, a voltage is applied to the secondary transfer roller 105, and the toner image is transferred (secondary transfer) from the intermediate transfer belt 102 to the sheet S.

[0027] The sheet S that has passed through the secondary transfer unit is conveyed to a fixing device 111. The fixing device 111 fixes the toner image on the sheet S to the sheet S by applying heat and pressure to the sheet S while nipping the sheet S in a nip portion (fixing nip) between a fixing roller and a pressure roller. The sheet S that has passed through the fixing device 111 is discharged to the outside of the apparatus main body 100B by a pair of discharge rollers 112 and is stacked on a discharge tray 113 provided on the top surface of the apparatus main body 100B.

[0028] As the image forming operation described above is repeatedly performed and the toner inside the developing device 104 is consumed, toner is supplied (replenished) from the toner cartridges 1Y to 1K to the developing device 104. This allows the developing device 104 to maintain a state in which a substantially constant amount of toner is contained therein.

[0029] The configuration of the image forming apparatus 100 described above is just one example, and it may be configured to form a color image by, for example, adsorbing and transporting a sheet S onto a belt, and sequentially transferring monochromatic toner images formed on multiple photosensitive drums onto the sheet S.

[0030] (Cartridge replacement overview) A method for replacing the toner cartridges 1Y to 1K will be described with reference to Figure 2. As shown in Figure 2, a front door 2 is provided on the side surface of the apparatus main body 100B on the front left side in the figure as an opening / closing member that can be opened and closed relative to the apparatus main body 100B. The toner cartridges 1Y to 1K are configured to be detachable from the apparatus main body 100B via an opening 115 provided in the apparatus main body 100B.

[0031] When the front door 2 is closed, the opening 115 and the toner cartridges 1Y-1K are covered by the front door 2, so the user or service personnel (hereinafter collectively referred to as the "worker") cannot see the toner cartridges 1Y-1K. When the front door 2 is open, the opening 115 and the toner cartridges 1Y-1K are exposed. As will be described later, when the front door 2 is open and one of the toner cartridges 1Y-1K is unlocked, the worker can grasp and remove the unlocked toner cartridge 1Y-1K. Figure 2 shows the magenta toner cartridge 1M, one of the four toner cartridges 1Y-1K, in the middle of being replaced.

[0032] Hereinafter, the direction in which the toner cartridges 1Y-1K are moved when they are removed from the apparatus main body 100B will be referred to as the removal direction D1. The side of the image forming apparatus 100 where the front door 2 is provided will be referred to as the front side (front side) of the image forming apparatus 100, and the opposite side (the far left side in FIG. 2) will be referred to as the back side (rear side) of the image forming apparatus 100. Furthermore, the up-down direction will refer to the vertical direction when the image forming apparatus 100 is placed on a horizontal surface.

[0033] (Cartridge mounting section) The cartridge mounting portion, which is provided in the apparatus main body 100B and into which the toner cartridges 1Y-1K are detachably mounted, will be described. In this embodiment, the toner cartridges 1Y-1K and the cartridge mounting portion have substantially the same configuration. Therefore, in the following description, any one of the toner cartridges 1Y-1K will be referred to as "toner cartridge 1," and the corresponding cartridge mounting portion will be described. The cartridge mounting portion refers to the portion that forms the storage space in the apparatus main body 100B that stores the toner cartridge 1.

[0034] Figures 3(a) to 3(c) are perspective views of the cartridge mounting portion. Figure 3(a) shows a state in which the toner cartridge 1 is mounted in a predetermined mounting position within the apparatus main body 100B and locked by a locking mechanism 6, which will be described later. Figure 3(b) shows a state in which the toner cartridge 1 is located in the mounting position within the apparatus main body 100B and the locking mechanism 6 has been released. Figure 3(c) shows a state in which the guide cover 5 has been removed from the cartridge guide 4 with the toner cartridge 1 removed.

[0035] As shown in Figures 3(a) and 3(b), the cartridge mounting section includes a cartridge guide 4 as a support member that supports the toner cartridge 1 mounted in the apparatus main body 100B. The cartridge guide 4 has a support surface 4b that supports the underside of the toner cartridge 1, and is a member that has a U-shaped (angular C-shape) cross section that opens upward when viewed from downstream in the removal direction D1 and that extends elongatedly in the removal direction D1. Therefore, the cartridge guide 4 functions as a guide means that guides the toner cartridge 1 when moving it in the removal direction D1 and the mounting direction D2 in the opposite direction. Note that the toner cartridge 1 in this embodiment has a generally rectangular parallelepiped shape that is elongated in the removal direction D1 (the front-to-rear direction of the image forming apparatus).

[0036] In this embodiment, a cartridge fixing lever 3 is provided on the side of the toner cartridge 1 in the removal direction D1, i.e., on the side facing the front of the device. The cartridge fixing lever 3 is a member that an operator operates to switch a locking mechanism 6, which will be described later, between a locked state that restricts removal of the toner cartridge 1 and an unlocked state that allows removal of the toner cartridge 1. In other words, the cartridge fixing lever 3 is an example of an operating part that is manually operated when removing the toner cartridge 1 from the device main body 100B. As will be described later, when the control unit 50 of the image forming apparatus determines that replacement of the toner cartridge 1 is not necessary, operation of the cartridge fixing lever 3 is restricted and becomes inoperable.

[0037] When the cartridge fixing lever 3 is in the fixed position shown in FIG. 3(a), the locking mechanism 6 is in a locked state, and movement of the toner cartridge 1 in the removal direction D1 is restricted. When the cartridge fixing lever 3 is in the unlocked position shown in FIG. 3(b), the locking mechanism 6 is in an unlocked state, and movement of the toner cartridge 1 in the removal direction D1 is permitted. In this state, the operator can remove the toner cartridge 1 from the device main body 100B by grasping the grip portion 1h of the toner cartridge 1 and pulling it out in the removal direction D1 along the cartridge guide 4. The operator can also install the toner cartridge 1 into the device main body 100B by inserting the toner cartridge 1 into a cartridge mounting section that does not already have a toner cartridge 1 installed, along the cartridge guide 4, in the installation direction D2.

[0038] 3(c) is a diagram showing the locking mechanism 6 as removal restriction means that restricts removal of the toner cartridge 1. At least a portion of the locking mechanism 6 is housed in a locking mechanism housing portion 4s that is recessed below the support surface 4b in the cartridge guide 4, and is covered from above by a guide cover 5. The guide cover 5 is attached to the cartridge guide 4 so as to be substantially flush with the support surface 4b of the cartridge guide 4, and guides the underside of the toner cartridge 1 together with the support surface 4b.

[0039] (locking mechanism) The locking mechanism 6 according to this embodiment will be described with reference to Figures 4(a) and 4(b). The locking mechanism 6 is disposed in each cartridge mounting portion of the toner cartridges 1Y to 1K. That is, the image forming apparatus 100 according to this embodiment is provided with four locking mechanisms 6 as an example of a plurality of removal restriction means provided corresponding to a plurality of cartridges. Below, the locking mechanism 6 corresponding to any one of the toner cartridges 1Y to 1K will be described, but the locking mechanisms 6 corresponding to the other toner cartridges have substantially the same configuration.

[0040] Figures 4(a) and 4(b) are perspective views of the locking mechanism 6 viewed from above in the direction of arrow W in Figure 3(c). Figure 4(a) shows the locking mechanism 6 in a locked state, and Figure 4(b) shows the locking mechanism 6 in an unlocked state with the cartridge fixing lever 3 moved to the unlocked position.

[0041] 4(a) and 4(b), the locking mechanism 6 of this embodiment has a cartridge fixing lever 3, a latched portion 3a, a latching portion 4a, a locking arm 7, an arm biasing spring 9, and a solenoid 10. The cartridge fixing lever 3 and the latched portion 3a are provided on the toner cartridge 1. The locking arm 7, the arm biasing spring 9, and the solenoid 10 are attached to the cartridge guide 4. In other words, the locking arm 7, the arm biasing spring 9, and the solenoid 10 are provided on the apparatus main body 100B.

[0042] The cartridge fixing lever 3 is provided so as to be rotatable about an axis extending substantially parallel to the removal direction D1. The cartridge fixing lever 3 has a knob 3b that is gripped by an operator. When viewed from downstream in the removal direction D1 with the front door 2 open, the knob 3b is exposed to the outside through a guide groove 1g provided in the frame of the toner cartridge 1 (FIGS. 3(a) and 3(b)).

[0043] The locked portion 3a is a portion that is locked to the locking portion 4a on the apparatus main body 100B side, and is configured to move relative to the locking portion 4a in response to operation of the cartridge fixing lever 3. In this embodiment, the locked portion 3a is provided as an integral member with the cartridge fixing lever 3, but the locked portion 3a may also be configured to move in conjunction with the cartridge fixing lever 3 via a link.

[0044] When the cartridge fixing lever 3 is in the fixed position (FIGS. 3(a) and 4(a)), the latched portion 3a, which is part of the toner cartridge 1, protrudes downward from the support surface 4b of the cartridge guide 4 and the upper surface of the guide cover 5. For this reason, the guide cover 5 is formed with a notch 5a (FIG. 3(c)) that penetrates vertically to receive the latched portion 3a.

[0045] The locking portion 4a is a part of the cartridge guide 4, and in particular is a wall portion on the downstream side of the lock mechanism accommodating portion 4s in the removal direction D1. The locking portion 4a is located downstream of the locked portion 3a in the removal direction D1.

[0046] As shown in FIG. 4(a), when the cartridge fixing lever 3 is in the fixed position, the locked portion 3a is in a position (locking position) where it overlaps with the locking portion 4a as viewed in the removal direction D1. Therefore, when the cartridge fixing lever 3 is in the fixed position, the locked portion 3a is locked with (interferes with) the locking portion 4a, thereby restricting movement of the toner cartridge 1 in the removal direction D1. On the other hand, as shown in FIG. 4(b), when the cartridge fixing lever 3 is in the unlocked position, the locked portion 3a is in a position (unlocking position) where it does not overlap with the locking portion 4a as viewed in the removal direction D1. Therefore, when the cartridge fixing lever 3 is in the unlocked position, the locked portion 3a is not locked with (interferes with) the locking portion 4a, and movement of the toner cartridge 1 in the removal direction D1 is permitted.

[0047] The lock arm 7 is provided rotatably about a rotation shaft 8 fixed to the cartridge guide 4. The lock arm 7 is movable between a locked position (FIG. 4(a)) that restricts movement of the cartridge fixing lever 3 from the fixed position to the unlocked position, and an unlocked position (FIG. 4(b)) that allows movement of the cartridge fixing lever 3 from the fixed position to the unlocked position. In other words, when the lock arm 7 is in the locked position, the lock arm 7 restricts rotation of the cartridge fixing lever 3 in a predetermined rotation direction (counterclockwise in the figure). The lock arm 7 functions as a restricting member that is movable between a first position (locked position) that restricts release of the engagement between the locked portion 3a and the locking portion 4a, and a second position (unlocked position) that allows release of the engagement between the locked portion 3a and the locking portion 4a.

[0048] The arm biasing spring 9 is a biasing member that biases the lock arm 7 toward the lock position. The arm biasing spring 9 in this embodiment is a torsion coil spring attached to the rotation shaft 8.

[0049] The solenoid 10 attracts the plunger 11 by a magnetic field generated by energization. The plunger 11 is rotatably connected to the lock arm 7. When the plunger 11 is attracted by the solenoid 10, the lock arm 7 moves from the locked position to the unlocked position against the biasing force of the arm biasing spring 9. When the plunger 11 is released from the solenoid 10, the lock arm 7 moves from the unlocked position to the locked position in accordance with the biasing force of the arm biasing spring 9. In other words, the solenoid 10 functions as an actuator that moves the lock arm 7 between the locked position and the unlocked position.

[0050] As shown in Figure 4(a), when the solenoid 10 is not energized, the lock arm 7 is held in the locked position. In this state, even if an operator attempts to move the cartridge locking lever 3 from the locked position to the unlocked position, the locked portion 3a interferes with the lock arm 7, preventing the operator from operating the cartridge locking lever 3. In other words, the locking mechanism 6 is in a locked state that restricts operation of the cartridge locking lever 3, which is the operating portion.

[0051] On the other hand, as shown in Figure 4(b), when the plunger 11 is attracted by energizing the solenoid 10, the lock arm 7 is moved from the locked position to the unlocked position. In this state, the lock arm 7 is retracted from the path of movement of the locked portion 3a, so the operator can operate the cartridge locking lever 3 to move it from the locked position (position in Figure 4(a)) to the unlocked position (position in Figure 4(b)). In other words, the locking mechanism 6 is in an unlocked state that allows operation of the cartridge locking lever 3, which is the operating portion.

[0052] In this embodiment, a notch 7a is provided in the lock arm 7. The notch 7a is formed so as to avoid the movement path of the locked portion 3a when the cartridge fixing lever 3 is operated with the lock arm 7 in the unlocked position (FIG. 4(b)). By providing such a notch 7a, it is possible to restrict the rotation range of the lock arm 7 while ensuring the operability of the cartridge fixing lever 3, and the lock mechanism 6 can be arranged in a compact space.

[0053] In this way, a new configuration can be provided that can restrict the removal of the cartridge by the locking mechanism 6 including the locked portion 3a, the locking portion 4a, the cartridge fixing lever 3 (operating portion), the lock arm 7 (regulating member) and the solenoid 10 (actuator).

[0054] (Lock control for each toner cartridge) Next, a method for controlling a plurality of locking mechanisms 6 provided corresponding to a plurality of toner cartridges will be described with reference to Figures 15 and 16. Figure 15 is a block diagram showing a control circuit of image forming apparatus 100 relating to control of locking mechanisms 6. Figure 16 is a flowchart showing an example of a control method for image forming apparatus 100.

[0055] 15, image forming apparatus 100 includes a control unit 50 as a control means. The control unit 50 includes a CPU that executes a control program for image forming apparatus 100, a non-volatile memory device (ROM) that stores the control program, and a memory device (RAM) that provides a workspace for the CPU when it executes the control program. The ROM that stores the control program is an example of a non-transitory storage medium that can be read by a computer.

[0056] The control unit 50 is electrically connected to the remaining toner amount sensors Sy, Sm, Sc, and Sk provided in each of the toner cartridges 1Y to 1K and the solenoids 10y, 10m, 10c, and 10k of the locking mechanisms 6 corresponding to each of the toner cartridges 1Y to 1K. The remaining toner amount sensors Sy to Sk are sensors that emit detection signals corresponding to the amount of toner remaining in the toner cartridges 1Y to 1K. The specific configuration of the sensors can be known. The control unit 50 controls the supply of electricity to the solenoids 10y to 10k by issuing commands to drive circuits that drive the solenoids 10y to 10k. In particular, the control unit 50 can selectively (i.e., independently of each other) switch the multiple locking mechanisms 6 between a locked state and an unlocked state by individually controlling the supply of electricity to the solenoids 10y to 10k according to a flowchart described below.

[0057] The control unit 50 is also electrically connected to an operation unit 55 serving as a user interface for the image forming apparatus 100, and a door open / close sensor Sd that detects whether the front door 2 (FIG. 2) is open or closed. The operation unit 55 has a liquid crystal panel as a display device that presents information to the operator using text and images, and a numeric keypad and touch panel function unit as an input device that accepts operation instructions and setting information input from the operator. The door open / close sensor Sd is, for example, a switch configured to turn ON / OFF depending on whether the front door 2 is open or closed.

[0058] 16 shows the control content continuously performed by the control unit 50 while the image forming apparatus 100 is powered on. The control unit 50 monitors whether any of the toner cartridges 1Y-1K has less than a predetermined amount of toner remaining, based on the detection signals of the toner remaining sensors Sy-Sk (S1). When the control unit 50 detects that the amount of toner remaining in any of the toner cartridges is less than the predetermined amount, the control unit 50 notifies the operator that the toner in the corresponding toner cartridge is empty, prompting the operator to replace the toner cartridge (S2). The operator may be notified by a display on the operation unit 55, or by sending a notification to an external computer connected to the control unit 50 via a network.

[0059] The control unit 50 also monitors whether any abnormality has occurred in the toner cartridges 1Y-1K (S3). An abnormality in the toner cartridges 1Y-1K occurs, for example, when information read from a memory chip (IC tag) attached to the toner cartridges 1Y-1K does not conform to a predetermined standard (for example, a toner cartridge of the wrong toner color is installed). Another example of an abnormality in the toner cartridges 1Y-1K is when the load on the motor that drives the screw that transports toner inside the toner cartridges 1Y-1K becomes abnormally large. The above are merely examples, and the control unit 50 determines that an abnormality has occurred if there is a problem with the continued use of the toner cartridges 1Y-1K. If an abnormality occurs in any of the toner cartridges 1Y-1K, the control unit 50 notifies the operator that an abnormality has occurred in the corresponding toner cartridge and prompts the operator to replace the toner cartridge (S4).

[0060] When the notification of S3 or S4 is issued, the control unit 50 energizes the solenoid 10 of the locking mechanism 6 corresponding to the toner cartridge to be replaced, thereby unlocking the locking mechanism 6 (S5). This allows the worker to remove the toner cartridge to be replaced from the apparatus main body 100B and perform the replacement work. Meanwhile, the control unit 50 does not energize the solenoid 10 of the locking mechanism 6 corresponding to toner cartridges other than the toner cartridge to be replaced, thereby maintaining the locked state of the locking mechanism 6. This makes it possible to prevent toner cartridges other than the toner cartridge to be replaced from being replaced.

[0061] When it is detected that the replacement of the toner cartridge is completed (S6), the control unit 50 cuts off the power supply to the lock mechanism 6 corresponding to the toner cartridge to be replaced, and sets the lock mechanism 6 in the locked state again (S7). The completion of the replacement of the toner cartridge is determined, for example, based on a detection signal from the door open / close sensor Sd that indicates that the front door 2 has been opened and then closed.

[0062] Although the case where the control unit 50 determines the need for toner cartridge replacement based on the remaining toner amount and the occurrence of an abnormality has been described here, the need for toner cartridge replacement may be determined based on other criteria. Furthermore, after issuing the notification S3 or S4, the control unit 50 may start energizing the solenoid 10 of the lock mechanism 6 corresponding to the toner cartridge to be replaced after detecting the opening of the front door 2 with the door open / close sensor Sd.

[0063] As described above, in this embodiment, a plurality of locking mechanisms 6 are provided corresponding to a plurality of toner cartridges 1Y to 1K. Furthermore, the control unit 50 selectively controls the solenoid 10 (actuator) provided in each of the plurality of locking mechanisms 6. This allows only the toner cartridge determined by the control unit 50 to require replacement to be unlocked by the locking mechanism 6, enabling replacement, while preventing other toner cartridges from being replaced.

[0064] That is, the image forming apparatus of this embodiment includes a first cartridge that is removably mounted to the apparatus main body, and a second cartridge that is removably mounted separately from the first cartridge. The image forming apparatus of this embodiment also includes a first removal restriction unit having a first actuator for switching between a state that restricts removal of the first cartridge and a state that allows removal of the first cartridge. The image forming apparatus of this embodiment also includes a second removal restriction unit having a second actuator for switching between a state that restricts removal of the second cartridge and a state that allows removal of the second cartridge. The image forming apparatus of this embodiment also includes a control unit that controls the first actuator and the second actuator independently of each other.

[0065] The first cartridge is, for example, toner cartridge 1Y, and the first removal restriction means and first actuator are the lock mechanism 6 and solenoid 10 corresponding to this toner cartridge 1Y. The second cartridge is, for example, toner cartridge 1M other than toner cartridge 1Y, and the second removal restriction means and second actuator are the lock mechanism 6 and solenoid 10 corresponding to this toner cartridge 1M.

[0066] That is, according to this embodiment, it is possible to individually restrict the removal of a plurality of cartridges with a simple configuration.

[0067] In addition, in this embodiment, when the locking mechanism 6 is in the locked state, the cartridge fixing lever 3, which is the operating part, becomes inoperable, so the operator can easily understand that the toner cartridge cannot be removed.

[0068] Also, it is common to configure the device so that a toner cartridge is fixed or released at a predetermined position in the device main body 100B by operating the cartridge fixing lever 3. Therefore, the configuration of this embodiment, which adds a function to restrict removal of each toner cartridge by locking the cartridge fixing lever 3 with the lock arm 7, does not significantly change the operating method that is familiar to operators, and therefore it is easy to ensure usability. [Example]

[0069] Next, a description will be given of Example 2. This example differs from Example 1 in the details of the configuration related to the attachment and detachment of the toner cartridge. Hereinafter, elements with the same reference numerals as Example 1 will be considered to have substantially the same configuration and function as those described in Example 1 unless otherwise specified, and differences from Example 1 will be mainly described.

[0070] Figures 5(a) to 5(c) are perspective views of the cartridge mounting portion according to this embodiment. Figure 5(a) shows a state in which the toner cartridge 1 is mounted in a predetermined mounting position within the apparatus main body 100B and locked by a locking mechanism 6, which will be described later. Figure 5(b) shows a state in which the toner cartridge 1 is located in a predetermined mounting position within the apparatus main body 100B and the locking mechanism 6 has been released. Figure 5(c) shows a state in which the guide cover 5 has been removed from the cartridge guide 4 with the toner cartridge 1 removed.

[0071] In this embodiment, a release lever 12 is provided on the side of the toner cartridge 1 in the removal direction D1, i.e., on the side facing the front of the device. The release lever 12 is a member that an operator operates to switch the locking mechanism 6 between a locked state that restricts removal of the toner cartridge 1 and an unlocked state that allows removal of the toner cartridge 1. In other words, the release lever 12 is an example of an operating part that is manually operated when removing the toner cartridge 1 from the device main body 100B. When the control unit 50 of the image forming device determines that replacement of the toner cartridge 1 is not necessary, operation of the release lever 12 is restricted and becomes inoperable.

[0072] Furthermore, the apparatus main body 100B of this embodiment is provided with a cartridge pushing-out spring 17 as a pushing-out means for pushing the toner cartridge 1 out of the apparatus main body 100B. The cartridge pushing-out spring 17 biases the toner cartridge 1 attached to the apparatus main body 100B in the removal direction D1.

[0073] 5(a), the locking mechanism 6 is in a locked state, and movement of the toner cartridge 1 in the removal direction D1 is restricted. In this case, the toner cartridge 1 remains in the installed position against the biasing force of the cartridge pushing-out spring 17.

[0074] 5(b), the locking mechanism 6 is released and the toner cartridge 1 is allowed to move in the removal direction D1. In this case, the toner cartridge 1 moves from the mounting position in the removal direction D1 due to the biasing force of the cartridge pushing-out spring 17, and is pushed out toward the outside of the apparatus main body 100B. do.

[0075] 5(c) is a diagram showing the locking mechanism 6 as a removal restriction means that restricts removal of the toner cartridge 1. At least a portion of the locking mechanism 6 is housed in a locking mechanism housing portion 4s that is recessed below the support surface 4b in the cartridge guide 4, and is covered from above by a guide cover 5. In this embodiment, the guide cover 5 is located at one end of the support surface 4b of the cartridge guide 4 when viewed from downstream in the removal direction D1.

[0076] The locking mechanism 6 serving as the removal restriction means according to this embodiment will be described with reference to Figures 6(a) to 6(c). As in the first embodiment, the locking mechanism 6 is provided for each of the toner cartridges 1Y to 1K. Below, the locking mechanism 6 corresponding to any one of the toner cartridges 1Y to 1K will be described, but the locking mechanisms 6 corresponding to the other toner cartridges have substantially the same configuration.

[0077] Figures 6(a) to 6(c) are cross-sectional views of the locking mechanism 6 in detail, as viewed from the VV cross section direction shown in Figure 5(c). Figure 6(a) shows the locking mechanism 6 in a locked state. Figure 6(b) shows the locking mechanism 6 in an unlocked state, with the cartridge fixing lever 3 in the fixed position. Figure 6(c) shows the locking mechanism 6 in an unlocked state, with the cartridge fixing lever 3 in the unlocked position.

[0078] As shown in FIG. 6(a), the lock mechanism 6 of this embodiment includes a release lever 12, a lever biasing spring 13, a latch engagement portion 1A, a latch 14, a latch biasing spring 15, a lock slider 37, a slider biasing spring 39, and a solenoid 10. The release lever 12, the lever biasing spring 13, and the latch engagement portion 1A are provided on the toner cartridge 1. The latch 14, the latch biasing spring 15, the lock slider 37, the slider biasing spring 39, and the solenoid 10 are attached to the cartridge guide 4. In other words, the latch 14, the latch biasing spring 15, the lock slider 37, the slider biasing spring 39, and the solenoid 10 are provided on the apparatus main body 100B.

[0079] The release lever 12 is provided to be slidable relative to the frame of the toner cartridge 1 in a direction intersecting the removal direction D1, particularly in the vertical direction in this embodiment. The release lever 12 has a knob 12b that is gripped by an operator. When viewed from downstream in the removal direction D1 with the front door 2 open, the knob 12b is exposed to the outside through a window 1w provided in the frame of the toner cartridge 1.

[0080] The lever biasing spring 13 is connected to the fixing / releasing lever 12 and the frame of the toner cartridge 1. The lever biasing spring 13 biases the fixing / releasing lever 12 toward the fixing position, that is, upward.

[0081] The latch engagement portion 1A is a portion (locked portion) that is locked by the latch 14 as a locking portion. In this embodiment, the latch engagement portion 1A is a part of the frame of the toner cartridge 1, and is a surface facing downstream in the removal direction D1.

[0082] The latch 14 is rotatable about a pivot shaft 16 fixed to the cartridge guide 4. The latch 14 has an engagement surface 14a facing upstream in the removal direction D1, and the engagement surface 14a can engage with the latch engagement portion 1A of the toner cartridge 1. The latch 14 can move between a position where the engagement surface 14a overlaps with the latch engagement portion 1A as viewed in the removal direction D1 (engaged position, FIGS. 6(a) and 6(b)), and a position where the engagement surface 14a does not overlap with the latch engagement portion 1A as viewed in the removal direction D1 (unengaged position, FIG. 6(c)). As shown in FIG. 5(c), the guide cover 5 is provided with a notch 5a. The notch 5a provides a space that allows the engagement surface 14a of the latch 14 located below the guide cover 5 to engage with the latch engagement portion 1A of the toner cartridge 1 located above the guide cover 5.

[0083] The latch biasing spring 15 biases the latch 14 so as to maintain the state in which the latch 14 is engaged with the latch engagement portion 1A at the engagement surface 14a. In other words, the latch biasing spring 15 biases the latch 14 upward.

[0084] The lock slider 37 is provided slidably along the removal direction D1 relative to the cartridge guide 4. The lock slider 37 is movable between a locked position (FIG. 6(a)) that restricts movement of the lock / release lever 12 from the fixed position to the unlocked position, and an unlocked position (FIGS. 6(b) and 6(c)) that allows movement of the lock / release lever 12 from the fixed position to the unlocked position. The lock slider 37 functions as a restricting member that is movable between a first position (locked position) that restricts release of the engagement between the locked portion (latch engagement portion 1A) and the locking portion (latch 14), and a second position (unlocked position) that allows release of the engagement between the locked portion and the locking portion.

[0085] The slider biasing spring 39 is a biasing member that biases the lock slider 37 toward the lock position. The slider biasing spring 39 in this embodiment is a coil spring connected to the lock slider 37 and the cartridge guide 4.

[0086] The solenoid 10 attracts the plunger 11 by a magnetic field generated by energization. The plunger 11 is connected to a lock slider 37. When the plunger 11 is attracted to the solenoid 10, the lock slider 37 moves from the locked position to the unlocked position against the biasing force of the slider biasing spring 39. When the plunger 11 is released from the solenoid 10, the lock slider 37 moves from the unlocked position to the locked position according to the biasing force of the slider biasing spring 39. In other words, the solenoid 10 functions as an actuator that moves the lock slider 37 between the locked position and the unlocked position.

[0087] As shown in Figure 6(a), when the solenoid 10 is not energized, the lock slider 37 is held in the locked position. In this state, even if an operator attempts to move the release lever 12 from the locked position to the unlocked position, the release lever 12 cannot be operated because the release lever 12 interferes with the latch 14 that is in contact with the lock slider 37. In other words, the lock slider 37 in the locked position restricts the release lever 12 from moving together with the latch 14 in a predetermined movement direction (downward in the figure). In other words, the lock mechanism 6 is in a locked state that restricts operation of the release lever 12, which is the operating part.

[0088] On the other hand, as shown in FIG. 6(b), when the plunger 11 is attracted by energizing the solenoid 10, the lock slider 37 is moved from the locked position to the unlocked position. In this state, the lock slider 37 is retracted from the movement path of the release lever 12 and the latch 14, so the operator can operate the release lever 12 to move it from the locked position (position in FIG. 6(b)) to the unlocked position (position in FIG. 6(c)). In other words, the lock slider 37 in the unlocked position allows the release lever 12 to move together with the latch 14 in a predetermined movement direction (downward in the figure). In other words, the lock mechanism 6 is in an unlocked state that allows operation of the cartridge locking lever 3, which is the operating part.

[0089] 6(c), when the release lever 12 moves to the release position, the toner cartridge 1 is automatically moved in the removal direction D1 by the biasing force of the cartridge push-out spring 17 described above. In other words, in this embodiment, the operation of both unlocking and removing the toner cartridge 1 is achieved with a single action of operating the release lever 12. When the operator releases the release lever 12, the biasing force of the lever biasing spring 13 causes the release lever 12 to return to the fixed position.

[0090] In this way, a new configuration can be provided that can restrict the removal of a cartridge by the locking mechanism 6 including the latch engagement portion 1A (locked portion), the latch 14 (locking portion), the release lever 12 (operating portion), the lock slider 37 (regulating member) and the solenoid 10 (actuator).

[0091] Also in this embodiment, a plurality of locking mechanisms 6 are provided corresponding to a plurality of toner cartridges, and each of the locking mechanisms 6 can be individually switched between a locked state and an unlocked state by controlling the solenoid 10. Therefore, by using the same control method as that described in the first embodiment, it is possible to unlock the locking mechanism 6 only for the toner cartridge that needs to be replaced, allowing it to be replaced, while preventing other toner cartridges from being replaced.

[0092] That is, according to this embodiment as well, it is possible to individually restrict the removal of a plurality of cartridges with a simple configuration.

[0093] Furthermore, as in Example 1, when the locking mechanism 6 is in the locked state, the lock release lever 12, which is the operating part, becomes inoperable, so the operator can easily understand that the toner cartridge cannot be removed. [Example]

[0094] Next, a description will be given of Example 3. This example differs from Example 1 in the details of the configuration related to the attachment and detachment of the toner cartridge. Hereinafter, elements with the same reference numerals as Example 1 will be considered to have substantially the same configuration and function as those described in Example 1 unless otherwise specified, and differences from Example 1 will be mainly described.

[0095] Figures 7(a) to 7(c) are perspective views of the cartridge mounting portion according to this embodiment. Figure 7(a) shows a state in which the toner cartridge 1 is mounted in a predetermined mounting position within the apparatus main body 100B and locked by a locking mechanism 6, which will be described later. Figure 7(b) shows a state in which the toner cartridge 1 is located in a predetermined mounting position within the apparatus main body 100B and the locking mechanism 6 has been released. Figure 7(c) shows a state in which the toner cartridge 1 is in the process of being removed from the mounting position.

[0096] In this embodiment, a side plate of the device main body 100B in the removal direction D1, i.e., a frame member on the front side of the device, is provided with a lock release lever 12. In other words, unlike in the second embodiment, the lock release lever 12 serving as an operating part in this embodiment is provided on the device main body 100B.

[0097] The release lever 12 is a member that is operated by an operator to switch the locking mechanism 6 between a locked state that restricts removal of the toner cartridge 1 and an unlocked state that allows removal of the toner cartridge 1. In other words, the release lever 12 is an example of an operating part that is manually operated when removing the toner cartridge 1 from the apparatus main body 100B. When the control unit 50 of the image forming apparatus determines that replacement of the toner cartridge 1 is not necessary, operation of the release lever 12 is restricted and becomes inoperable.

[0098] In this embodiment, the apparatus main body 100B is provided with a cartridge pushing-out spring 17 as pushing-out means for pushing the toner cartridge 1 out of the apparatus main body 100B.

[0099] 7(a), the locking mechanism 6 is in a locked state, and movement of the toner cartridge 1 in the removal direction D1 is restricted. In this case, the toner cartridge 1 remains in the installed position against the biasing force of the cartridge pushing-out spring 17.

[0100] On the other hand, when the release lever 12 is moved to the release position shown in Fig. 7(b), the locking mechanism 6 is released and movement in the removal direction D1 of the toner cartridge 1 is permitted. In this case, as shown in Fig. 7(c), the toner cartridge 1 moves in the removal direction D1 from the mounting position due to the biasing force of the cartridge push-out spring 17, and is pushed out towards the outside of the apparatus main body 100B. do.

[0101] The locking mechanism 6 serving as the removal restriction means according to this embodiment will be described with reference to Figures 7(a-c) and 8(a, b). Similar to the first embodiment, the locking mechanism 6 is provided for each of the toner cartridges 1Y-1K. Below, the locking mechanism 6 corresponding to any one of the toner cartridges 1Y-1K will be described, but the locking mechanisms 6 corresponding to the other toner cartridges have substantially the same configuration.

[0102] In this embodiment, the locking mechanism 6 is disposed on the upper edge of the ejection opening for the toner cartridge 1 in the apparatus main body 100B (FIGS. 7(a) to 7(c)).

[0103] 8(a) and 8(b) are cross-sectional views of the locking mechanism 6 as viewed from upstream in the removal direction D1 in the VV cross section direction shown in FIG. 7(a). Fig. 8(a) shows the locking mechanism 6 in a locked state. Fig. 8(b) shows the locking mechanism 6 in an unlocked state.

[0104] 8(a), the lock mechanism 6 of this embodiment includes a release lever 12, a lever biasing spring 13, a cartridge recess 19, a lever protrusion 18, a lock arm 7, an arm biasing spring 9, and a solenoid 10. Of these, the cartridge recess 19 is provided in the toner cartridge 1. The release lever 12, the lever biasing spring 13, the lever protrusion 18, the lock arm 7, the arm biasing spring 9, and the solenoid 10 are attached to the frame of the apparatus main body 100B. In other words, the release lever 12, the lever biasing spring 13, the lever protrusion 18, the lock arm 7, the arm biasing spring 9, and the solenoid 10 are provided in the apparatus main body 100B.

[0105] The lock-release lever 12 is provided on the device main body 100B so as to be slidable in a direction intersecting the removal direction D1, particularly in the vertical direction in this embodiment. The lock-release lever 12 has a knob 12b that is gripped by an operator. The knob 12b is exposed to the outside when viewed from downstream in the removal direction D1 with the front door 2 open.

[0106] The lever biasing spring 13 is a compression spring connected to the fixing / releasing lever 12 and the frame of the toner cartridge 1. The lever biasing spring 13 biases the fixing / releasing lever 12 toward the fixing position, that is, upward.

[0107] The cartridge recess 19 is a portion (locked portion) that is locked by the lever protrusion 18 serving as a locking portion. The cartridge recess 19 in this embodiment is a recessed shape in which part of the upper surface of the frame of the toner cartridge 1 is recessed downward.

[0108] The lever protrusion 18 has a convex shape that protrudes downward from a part of the lock / release lever 12 so as to be able to engage with the cartridge recess 19. The lever protrusion 18 is movable between a position where it overlaps with the wall surface of the cartridge recess 19 when viewed in the removal direction D1 (locking position, FIG. 8(a)), and a position where it does not overlap with the wall surface of the cartridge recess 19 when viewed in the removal direction D1 (locking release position, FIG. 8(b)).

[0109] The lock arm 7 is provided rotatably about a rotation shaft 8 fixed to a side plate of the apparatus main body 100B. The lock arm 7 is movable between a locked position (FIG. 8(a)) that restricts movement of the lock-release lever 12 from the locked position to the unlocked position, and an unlocked position (FIG. 8(b)) that allows movement of the lock-release lever 12 from the locked position to the unlocked position. The lock arm 7 functions as a restricting member that is movable between a first position (locked position) that restricts the locked portion (cartridge recess 19) from disengaging from the locking portion (lever protrusion 18), and a second position (unlocked position) that allows the locked portion to disengage from the locking portion.

[0110] The arm biasing spring 9 is a biasing member that biases the lock arm 7 toward the lock position. The arm biasing spring 9 in this embodiment is a torsion coil spring attached to the rotation shaft 8.

[0111] The solenoid 10 attracts the plunger 11 by a magnetic field generated by energization. The plunger 11 is rotatably connected to the lock arm 7. When the plunger 11 is attracted by the solenoid 10, the lock arm 7 moves from the locked position to the unlocked position against the biasing force of the arm biasing spring 9. When the plunger 11 is released from the solenoid 10, the lock arm 7 moves from the unlocked position to the locked position in accordance with the biasing force of the arm biasing spring 9. In other words, the solenoid 10 functions as an actuator that moves the lock arm 7 between the locked position and the unlocked position.

[0112] 8(a), when the solenoid 10 is not energized, the lock arm 7 is held in the locked position. In this state, even if an operator attempts to move the release lever 12 from the locked position to the unlocked position, the abutment portion 12a of the release lever 12 interferes with the lock arm 7, preventing the operator from operating the cartridge locking lever 3. In other words, the lock mechanism 6 is in a locked state that restricts operation of the release lever 12, which is the operating portion.

[0113] On the other hand, as shown in Figure 8(b), when the plunger 11 is attracted by energizing the solenoid 10, the lock arm 7 is moved from the locked position to the unlocked position. In this state, the lock arm 7 is retracted from the movement path of the abutment portion 12a, so the operator can operate the lock release lever 12 to move the lock arm 7 from the locked position (position in Figure 8(a)) to the unlocked position (position in Figure 8(b)). In other words, the lock mechanism 6 is in an unlocked state that allows operation of the lock release lever 12, which is the operating portion.

[0114] In this way, a new configuration can be provided that can restrict the removal of the cartridge by the locking mechanism 6 including the cartridge recess 19 (locked portion), the lever protrusion 18 (locking portion), the lock release lever 12 (operating portion), the lock arm 7 (regulating member) and the solenoid 10 (actuator).

[0115] Also in this embodiment, a plurality of locking mechanisms 6 are provided corresponding to a plurality of toner cartridges, and each of the locking mechanisms 6 can be individually switched between a locked state and an unlocked state by controlling the solenoid 10. Therefore, by using the same control method as that described in the first embodiment, it is possible to unlock the locking mechanism 6 only for the toner cartridge that needs to be replaced, allowing it to be replaced, while preventing other toner cartridges from being replaced.

[0116] That is, according to this embodiment as well, it is possible to individually restrict the removal of a plurality of cartridges with a simple configuration.

[0117] Furthermore, as in Examples 1 and 2, when the locking mechanism 6 is in the locked state, the release lever 12, which is the operating part, becomes inoperable, so the operator can easily understand that the toner cartridge cannot be removed.

[0118] Furthermore, in this embodiment, the fixing / releasing lever 12, which is the operating part, is located on the device main body 100B, so the number of parts in the toner cartridge 1 can be reduced compared to embodiments 1 and 2. In other words, the structure of the toner cartridge 1, which is a consumable item, can be simplified and provided at a lower cost.

[0119] The cartridge recess 19 and the lever protrusion 18 may be disposed on a portion (lower surface or side surface) other than the upper surface of the toner cartridge 1. In addition, although the present embodiment illustrates a configuration in which the locked portion is recessed and the locking portion is convex, the locked portion may be convex and the locking portion may be recessed. [Example]

[0120] Next, a fourth embodiment will be described. This embodiment differs from the first embodiment in the details of the configuration related to the attachment and detachment of the toner cartridge. Hereinafter, elements with the same reference numerals as the first embodiment will be considered to have substantially the same configuration and function as those described in the first embodiment unless otherwise specified, and differences from the first embodiment will be mainly described.

[0121] 9(a) to 9(c) are cross-sectional views showing a part of the rear side (opposite side from the removal direction D1) of the cartridge mounting portion according to this embodiment. In this embodiment, the locking mechanism 6 that restricts removal of the toner cartridge 1 is disposed on the rear side of the toner cartridge 1.

[0122] Fig. 9(a) shows the state in which the locking mechanism 6 is locked. Fig. 9(b) shows the state in which the locking mechanism 6 is unlocked and the toner cartridge 1 remains in the installed position. Fig. 9(c) shows the state in which the locking mechanism 6 is unlocked and the toner cartridge 1 is in the process of being removed from the installed position.

[0123] 9(a), the locking mechanism 6 of this embodiment has a toggle arm 20, a toggle biasing spring 21, an arm engaging portion 23, a locking arm 7, an arm biasing spring 9, and a solenoid 10. Of these, the arm engaging portion 23 is provided on the toner cartridge 1. The toggle arm 20, the toggle biasing spring 21, the locking arm 7, the arm biasing spring 9, and the solenoid 10 are provided on the apparatus main body 100B.

[0124] The arm engaging portion 23 is a portion (engaged portion) that is engaged by the toggle arm 20 serving as a retracting member. In this embodiment, the arm engaging portion 23 is a part of the frame of the toner cartridge 1, and is a hook-shaped protrusion that protrudes rearward from the rear side surface of the toner cartridge 1 (the side surface upstream of the removal direction D1, the back surface).

[0125] The toggle arm 20 is provided rotatably about a rotation axis 22 fixed to the frame of the device main body 100B. The toggle arm 20 is an arm member that can rotate between a first angle (the position shown in FIGS. 9(a) and 9(b)) at which it engages with the arm engaging portion 23 and a second angle (the position shown in FIG. 9(c)) at which it disengages from the arm engaging portion 23.

[0126] The toggle biasing spring 21 is a spring member that biases the toggle arm 20. The toggle arm 20 is disposed so that the direction of biasing the toggle arm 20 changes at a predetermined angle between a first angle and a second angle of the toggle arm 20. That is, when the toggle arm 20 is in a position closer to the first angle than the predetermined angle, the toggle biasing spring 21 biases the toggle arm 20 toward the first angle. On the other hand, when the toggle arm 20 is in a position closer to the second angle than the predetermined angle, the toggle biasing spring 21 biases the toggle arm 20 toward the second angle. That is, the toggle arm 20 and the toggle biasing spring 21 constitute a toggle mechanism (fulcrum-overcoming mechanism) whose stable points are the first angle and the second angle.

[0127] The lock arm 7 is provided rotatably about a rotation shaft 8 fixed to the frame of the device main body 100B. The lock arm 7 is movable between a locked position (FIG. 9(a)) that restricts movement of the toggle arm 20 from a first angle to a second angle, and an unlocked position (FIGS. 9(b) and 9(c)) that allows movement of the toggle arm 20 from the first angle to the second angle. The lock arm 7 functions as a restricting member that is movable between a first position (locked position) that restricts release of the engagement between the engaged portion (arm engaging portion 23) and the retracting member (toggle arm 20), and a second position (unlocked position) that allows release of the engagement between the engaged portion and the retracting member.

[0128] The arm biasing spring 9 is a biasing member that biases the lock arm 7 toward the lock position. The arm biasing spring 9 in this embodiment is a torsion coil spring attached to the rotation shaft 8.

[0129] The solenoid 10 attracts the plunger 11 by a magnetic field generated by energization. The plunger 11 is rotatably connected to the lock arm 7. When the plunger 11 is attracted by the solenoid 10, the lock arm 7 moves from the locked position to the unlocked position against the biasing force of the arm biasing spring 9. When the plunger 11 is released from the solenoid 10, the lock arm 7 moves from the unlocked position to the locked position in accordance with the biasing force of the arm biasing spring 9. In other words, the solenoid 10 functions as an actuator that moves the lock arm 7 between the locked position and the unlocked position.

[0130] 9(a), when the solenoid 10 is not energized, the lock arm 7 is held in the locked position. In this state, movement of the toggle arm 20 from the first angle to the second angle is restricted, so even if an operator tries to grip the toner cartridge 1 and move it in the removal direction D1, the arm engaging portion 23 engages with the toggle arm 20 and the toner cartridge 1 does not move. In other words, the lock mechanism 6 is in a locked state in which the toggle arm 20 is locked at the first angle at which the toner cartridge 1 can be engaged.

[0131] 9(b), when the plunger 11 is attracted by energizing the solenoid 10, the lock arm 7 is moved from the locked position to the unlocked position. In this state, the lock arm 7 is retracted from the rotation path of the toggle arm 20, and therefore the rotation of the toggle arm 20 from the first angle to the second angle is not impeded.

[0132] Then, as shown in FIG. 9(c), when the worker grips the toner cartridge 1 and moves it in the removal direction D1, the toggle arm 20 rotates from the first angle to the second angle in conjunction with the movement of the toner cartridge 1.

[0133] Here, after removing the toner cartridge 1, while inserting a new toner cartridge 1 in the installation direction D2, the arm engaging portion 23 abuts against the toggle arm 20, and the toggle arm 20 begins to rotate from the second angle toward the first angle. When the toggle arm 20 exceeds a predetermined angle, the biasing direction of the toggle biasing spring 21 changes, and the toggle arm 20 is biased toward the first angle. As a result, the toggle arm 20 presses the arm engaging portion 23 to the left in the figure, thereby applying a force that draws the toner cartridge 1 in the installation direction D2 toward the installation position within the device main body 100B. In other words, during the process of installing the toner cartridge 1 into the device main body 100B, the biasing force of the toggle biasing spring 21 causes the toggle arm 20 to draw the toner cartridge 1 toward the device main body.

[0134] Thus, the locking mechanism 6 of this embodiment has the function of restricting the removal of the toner cartridge 1, as well as the function of assisting the installation of the toner cartridge 1 by pulling in the toner cartridge 1 when the toner cartridge 1 is installed. In other words, the locking mechanism 6 including the arm engaging portion 23 (engaged portion), toggle arm 20 (pulling member), locking arm 7 (restricting member), and solenoid 10 (actuator) can provide a new configuration that can restrict the removal of the cartridge.

[0135] Also in this embodiment, a plurality of locking mechanisms 6 are provided corresponding to a plurality of toner cartridges, and each of the locking mechanisms 6 can be individually switched between a locked state and an unlocked state by controlling the solenoid 10. Therefore, by using the same control method as that described in the first embodiment, it is possible to unlock the locking mechanism 6 only for the toner cartridge that needs to be replaced, allowing it to be replaced, while preventing other toner cartridges from being replaced.

[0136] That is, according to this embodiment as well, it is possible to individually restrict the removal of a plurality of cartridges with a simple configuration.

[0137] Furthermore, a solenoid 10 and a lock arm 7 are added to the toggle mechanism that draws the cartridge into the device body, providing a function for restricting the removal of the cartridge, so that the removal of multiple cartridges can be individually restricted with a simpler configuration. [Example]

[0138] Next, a fifth embodiment will be described. This embodiment differs from the first embodiment in the details of the configuration related to the attachment and detachment of the toner cartridge. Hereinafter, elements with the same reference numerals as the first embodiment will be considered to have substantially the same configuration and function as those described in the first embodiment unless otherwise specified, and differences from the first embodiment will be mainly described.

[0139] Figures 10(a) to 10(c) are cross-sectional views of the toner cartridge 1 and the cartridge mounting portion in this embodiment. Figure 10(a) shows a state in which the locking mechanism 6 has locked the toner cartridge 1 from moving upward. Figure 10(b) shows a state in which the locking mechanism 6 has released the toner cartridge 1 and the toner cartridge 1 remains in the mounting position. Figure 10(c) shows a state in which the locking mechanism 6 has released the toner cartridge 1 and the toner cartridge 1 has been lifted upward from the mounting position.

[0140] 10(a), the locking mechanism 6 of this embodiment has a cartridge protrusion 48, a guide recess 49, a lock arm 7, an arm biasing spring 9, and a solenoid 10. Of these, the cartridge protrusion 48 is provided on the toner cartridge 1. The guide recess 49, the lock arm 7, the arm biasing spring 9, and the solenoid 10 are attached to the cartridge guide 4 or the frame of the apparatus main body 100B. In other words, the guide recess 49, the lock arm 7, the arm biasing spring 9, and the solenoid 10 are provided on the apparatus main body 100B.

[0141] The cartridge protrusion 48 is a portion (locked portion) that is locked by the guide recess 49 serving as a locking portion. The cartridge protrusion 48 in this embodiment is a convex portion in which part of the lower surface of the frame of the toner cartridge 1 protrudes downward.

[0142] The guide recess 49 is provided at a position corresponding to the cartridge protrusion 48 of the cartridge guide 4, and is a recess into which the cartridge protrusion 48 can be fitted. The guide recess 49 is recessed downward with respect to the support surface 4b of the cartridge guide 4.

[0143] When the toner cartridge 1 is lifted upward, the cartridge protrusion 48 disengages from the guide recess 49. In other words, the cartridge protrusion 48 as the locked portion is configured to disengage from the guide recess 49 as the locking portion when the toner cartridge 1 is moved in a predetermined direction (arrow D3) that intersects with the removal direction D1 when the toner cartridge 1 is removed from the apparatus main body 100B.

[0144] The lock arm 7 is provided rotatably about a rotation shaft 8 fixed to the frame of the apparatus main body 100B. The lock arm 7 is movable between a locked position (FIG. 10(a)) that restricts the toner cartridge 1 from being lifted upward, and an unlocked position (FIG. 10(b, b)) that allows the lock release lever 12 to move from the locked position to the unlocked position. The lock arm 7 functions as a restricting member that is movable between a first position (locked position) that restricts the locked portion (cartridge protrusion 48) from being released from the locking portion (guide recess 49), and a second position (unlocked position) that allows the locked portion to be released from the locking portion.

[0145] The arm biasing spring 9 is a biasing member that biases the lock arm 7 toward the lock position. The arm biasing spring 9 in this embodiment is a torsion coil spring attached to the rotation shaft 8.

[0146] The solenoid 10 attracts the plunger 11 by a magnetic field generated by energization. The plunger 11 is rotatably connected to the lock arm 7. When the plunger 11 is attracted by the solenoid 10, the lock arm 7 moves from the locked position to the unlocked position against the biasing force of the arm biasing spring 9. When the plunger 11 is released from the solenoid 10, the lock arm 7 moves from the unlocked position to the locked position in accordance with the biasing force of the arm biasing spring 9. In other words, the solenoid 10 functions as an actuator that moves the lock arm 7 between the locked position and the unlocked position.

[0147] In this embodiment, the apparatus main body 100B is provided with a cartridge pushing-out spring 17 as pushing-out means for pushing the toner cartridge 1 out of the apparatus main body 100B.

[0148] As shown in Figure 10(a), when the solenoid 10 is not energized, the lock arm 7 is held in the locked position. In this state, even if an operator tries to lift the toner cartridge 1, the operator cannot do so because the top surface of the toner cartridge 1 interferes with the lock arm 7. In other words, the lock mechanism 6 is in a locked state that restricts the operation of moving the toner cartridge 1 in a predetermined direction.

[0149] 10(b), when the plunger 11 is attracted by energizing the solenoid 10, the lock arm 7 is moved from the locked position to the unlocked position. In this state, the lock arm 7 is retracted from its movement path upward compared to the locked position, allowing the operator to lift the toner cartridge 1 upward. In other words, the toner cartridge 1 is in an unlocked state that allows the operation to move the toner cartridge 1 in a predetermined direction.

[0150] 10(c), when the toner cartridge 1 is lifted, the cartridge protrusion 48 is released from the guide recess 49. Then, in accordance with the biasing force of the cartridge pushing spring 17, the toner cartridge 1 moves from the mounting position in the removal direction D1 and is pushed out toward the outside of the apparatus main body 100B.

[0151] In this way, a new configuration can be provided that can restrict the removal of the cartridge by the locking mechanism 6 including the cartridge convex portion 48 (locked portion), the guide concave portion 49 (locking portion), the locking arm 7 (regulating member), and the solenoid 10 (actuator).

[0152] Also in this embodiment, a plurality of locking mechanisms 6 are provided corresponding to a plurality of toner cartridges, and each of the locking mechanisms 6 can be individually switched between a locked state and an unlocked state by controlling the solenoid 10. Therefore, by using the same control method as that described in the first embodiment, it is possible to unlock the locking mechanism 6 only for the toner cartridge that needs to be replaced, allowing it to be replaced, while preventing other toner cartridges from being replaced.

[0153] That is, according to this embodiment as well, it is possible to individually restrict the removal of a plurality of cartridges with a simple configuration.

[0154] Furthermore, when the locking mechanism 6 is in the locked state, the toner cartridge 1 cannot be moved in a predetermined direction, so the worker can easily understand that the toner cartridge cannot be removed.

[0155] In this embodiment, the toner cartridge 1 is removed by moving the toner cartridge 1 in a predetermined direction intersecting the removal direction D1 and then pulling it out in the removal direction D1, where the predetermined direction is upward. However, the present invention is not limited to this, and the toner cartridge 1 may be configured so that the locked portion of the toner cartridge 1 is released from the locking portion of the device main body 100B by moving the toner cartridge 1 in a direction intersecting the removal direction D1 (for example, to the right or left as viewed in the removal direction D1).

[0156] Furthermore, in this embodiment, the configuration in which the locked portion is convex and the locking portion is concave is exemplified, but the locked portion may be concave and the locking portion may be convex. [Example]

[0157] Next, a sixth embodiment will be described. This embodiment differs from the first embodiment in the details of the configuration related to the attachment and detachment of the toner cartridge. Hereinafter, elements with the same reference numerals as the first embodiment will be considered to have substantially the same configuration and function as those described in the first embodiment unless otherwise specified, and differences from the first embodiment will be mainly described.

[0158] Figures 11(a) to 11(c) are perspective views showing the cartridge mounting portion in this embodiment. Figure 11(a) shows a state in which the toner cartridge 1 is mounted in the mounting position inside the device main body 100B and the handle cover 24, which will be described later, is closed. Figure 11(b) shows a state in which the toner cartridge 1 is located in the mounting position inside the device main body 100B and the handle cover 24 is open. Figure 11(c) shows a state in which the toner cartridge 1 is in the process of being removed from the mounting position.

[0159] In this embodiment, the apparatus main body 100B is provided with a handle cover 24 that restricts access to the handle 25 of the toner cartridge 1. The handle cover 24 is movable between a closed position (position shown in FIG. 11A) that covers an opening 25o (FIG. 11B) through which a hand can be inserted into the handle 25, and an open position (position shown in FIG. 11B) that exposes the opening 25o. The opening 25o is a space that is formed between the handle 25 and the periphery of an opening 115 (FIG. 2) in the apparatus main body 100B, through which the toner cartridge 1 passes when installing or removing the toner cartridge 1, and allows an operator to insert their hand into the handle 25 from the downstream side in the removal direction. In other words, the handle cover 24 functions as a restricting member (shielding member) that can be moved between a first position (closed position) that covers a portion of the toner cartridge 1 (opening 25o) to restrict access to the grip portion (handle 25) when viewed from downstream in the removal direction D1, and a second position (open position) that exposes a portion of the toner cartridge 1 to allow access to the grip portion.

[0160] The handle cover 24 is a plate-shaped member and is positioned so that the area it occupies when in the open position as viewed from downstream in the removal direction D1 is smaller than the area it occupies when in the closed position as viewed from downstream in the removal direction D1.

[0161] The cartridge mounting portion is provided with a cover opening / closing mechanism 26 that moves the handle cover 24 between a closed position and an open position. With the handle cover 24 moved to the open position as shown in Fig. 11(b), the operator can remove the toner cartridge 1 from the apparatus main body 100B by grasping the handle 25 through the opening 25o and pulling it in the removal direction D1 as shown in Fig. 11(c).

[0162] Four cover opening / closing mechanisms 26 are provided corresponding to the multiple toner cartridges 1Y to 1K, and each restricts access to the handle 25 of the corresponding toner cartridge. In other words, the cover opening / closing mechanisms 26 are an example of multiple removal restriction means provided corresponding to the multiple cartridges.

[0163] Figures 12(a) to 12(c) are cross-sectional views showing the cover opening / closing mechanism 26. Figure 12(a) shows a closed state (locked state) in which the cover opening / closing mechanism 26 holds the handle cover 24 in the closed position. Figure 12(b) shows an open state (unlocked state) in which the cover opening / closing mechanism 26 has moved the handle cover 24 to the open position. Figure 12(c) shows a state in which the toner cartridge 1 is being pulled out in the removal direction D1 with the cover opening / closing mechanism 26 in the open state.

[0164] The cover opening / closing mechanism 26 includes a handle cover 24, a cover biasing spring 28, a cover opening / closing slider 29, and a solenoid 10. The handle cover 24, the cover biasing spring 28, the cover opening / closing slider 29, and the solenoid 10 are all disposed in the device main body 100B.

[0165] The handle cover 24 is provided rotatably about a rotation shaft 27 fixed to the frame of the device main body 100B. A cover biasing spring 28 biases the handle cover 24 toward the closed position. In this embodiment, the cover biasing spring 28 is a torsion coil spring attached to the rotation shaft 27. A cover opening / closing slider 29 is a link member that connects the plunger 11, which is driven by the solenoid 10, and the handle cover 24.

[0166] The solenoid 10 attracts the plunger 11 by a magnetic field generated by energization. When the plunger 11 is attracted to the solenoid 10, the cover opening / closing slider 29 slides together with the plunger 11, and the handle cover 24 moves from the closed position to the open position against the biasing force of the cover biasing spring 28 (FIG. 12(b)). When the plunger 11 is released from the solenoid 10, the handle cover 24 moves from the open position to the closed position in accordance with the biasing force of the cover biasing spring 28, and the cover opening / closing slider 29 moves following the handle cover 24 (FIG. 12(a)). In other words, the solenoid 10 functions as an actuator that moves the handle cover 24 between the closed position and the open position.

[0167] When the handle cover 24 is in the open position, as described above, the operator can access the handle 25 through the exposed opening 25o, grasp the handle 25, and pull out the toner cartridge 1 in the removal direction D1.

[0168] In this way, a new configuration can be provided that can restrict removal of the cartridge by the cover opening / closing mechanism 26 including the handle cover 24 (restriction member) and the solenoid 10 (actuator).

[0169] Furthermore, in this embodiment, a plurality of cover opening / closing mechanisms 26 are provided corresponding to a plurality of toner cartridges, and each of the cover opening / closing mechanisms 26 can be individually switched between a closed state and an open state by controlling the solenoid 10. Therefore, by using the same control method as that described in the first embodiment, it is possible to open the cover opening / closing mechanism 26 of only the toner cartridge that needs to be replaced, thereby enabling replacement, while preventing other toner cartridges from being replaced.

[0170] That is, according to this embodiment as well, it is possible to individually restrict the removal of a plurality of cartridges with a simple configuration.

[0171] In addition, in this embodiment, the openings 25o of the toner cartridges other than the toner cartridge to be replaced are covered by the handle cover 24 in the closed position, so the worker can visually recognize that the toner cartridge cannot be removed.

[0172] Furthermore, since the handle cover 24 of this embodiment only covers a portion of the toner cartridge when viewed from the front, the mechanism for restricting access to the handle 25 can be placed in a more space-saving manner than in the case where a door is provided to cover the entire toner cartridge. [Example]

[0173] Next, Example 7 will be described. This example differs from Example 1 in the details of the configuration related to the attachment and detachment of the toner cartridge. Hereinafter, elements with the same reference numerals as Example 1 will be considered to have substantially the same configuration and function as those described in Example 1 unless otherwise specified, and differences from Example 1 will be mainly described.

[0174] Figures 13(a) and 13(b) are perspective views of the cartridge mounting portion in this embodiment. Figure 13(a) shows the toner cartridge 1 in the mounted position inside the apparatus main body 100B. Figure 13(b) shows the toner cartridge 1 being pulled out from the mounted position.

[0175] The toner cartridge 1 in this embodiment is a substantially cylindrical container (toner bottle). The toner cartridge 1 is configured to eject the toner inside by rotating it about its longitudinal axis (the center line of the cylindrical shape, the axis of rotation) while it is attached to the apparatus main body 100B. The toner cartridge 1 has a handle 25 at the tip in the removal direction D1 as a gripping portion that can be held by an operator.

[0176] 13(a) and 13(b), the cartridge mounting portion includes a cartridge guide 4 as a support member that supports the toner cartridge 1 mounted in the apparatus main body 100B. The cartridge guide 4 has a C-shaped cross section that opens upward when viewed from downstream in the removal direction D1, and is an elongated member that extends in the removal direction D1. Therefore, the cartridge guide 4 functions as a guide means that guides the toner cartridge 1 when it is moved in the removal direction D1 and the mounting direction D2, which is the opposite direction.

[0177] Figures 14(a) and 14(b) are perspective views showing the locking mechanism 6. Figure 14(a) shows the locking mechanism 6 in a locked state, and Figure 14(b) shows the locking mechanism 6 in an unlocked state.

[0178] 14(a), the locking mechanism 6 has an annular groove 32, a locking arm 7, an arm biasing spring 9, and a solenoid 10. The annular groove 32 is provided in the toner cartridge 1. The locking arm 7, the arm biasing spring 9, and the solenoid 10 are provided in the apparatus main body 100B.

[0179] The annular groove 32 is a portion (locked portion) that is locked by the lock arm 7 serving as a locking portion. The annular groove 32 is a groove shape that is recessed radially inward from the cylindrical outer peripheral surface of the toner cartridge 1, centered on the rotation axis of the toner cartridge 1, and is formed continuously in a ring shape in the rotation direction (circumferential direction) of the toner cartridge 1. Note that the locked portion may also be a convex shape that protrudes radially outward from the outer peripheral surface of the toner cartridge 1, and is formed continuously in a ring shape in the rotation direction (circumferential direction) of the toner cartridge 1.

[0180] The lock arm 7 is provided rotatably about a rotation shaft 8 fixed to the frame of the apparatus main body 100B. The lock arm 7 is movable between a locked position (position in FIG. 14(a), engaged position, locked position) in which it engages with the annular groove 32, and an unlocked position (position in FIG. 14(b), disengaged position, non-engaged position) in which it disengages from the annular groove 32. The lock arm 7 functions as a restricting member (locking member) that can move between a first position (locked position) in which it engages the engaged portion of the cartridge to restrict removal of the cartridge, and a second position (unlocked position) in which it disengages from the engaged portion of the cartridge.

[0181] Here, since the annular groove 32 is formed in an annular shape on the outer periphery of the toner cartridge 1, the lock arm 7 does not interfere with the rotation of the toner cartridge 1 when the toner cartridge 1 is rotated for toner replenishment.

[0182] The arm biasing spring 9 is a biasing member that biases the lock arm 7 toward the lock position. The arm biasing spring 9 in this embodiment is a torsion coil spring attached to the rotation shaft 8.

[0183] The solenoid 10 attracts the plunger 11 by a magnetic field generated by energization. The plunger 11 is rotatably connected to the lock arm 7. When the plunger 11 is attracted by the solenoid 10, the lock arm 7 moves from the locked position to the unlocked position against the biasing force of the arm biasing spring 9. When the plunger 11 is released from the solenoid 10, the lock arm 7 moves from the unlocked position to the locked position in accordance with the biasing force of the arm biasing spring 9. In other words, the solenoid 10 functions as an actuator that moves the lock arm 7 between the locked position and the unlocked position.

[0184] As described above, the lock mechanism 6 including the annular groove 32 (locked portion), the lock arm 7 (restriction member), and the solenoid 10 (actuator) can provide a new configuration that can restrict removal of the cartridge.

[0185] In this embodiment, a plurality of locking mechanisms 6 are provided corresponding to the plurality of toner cartridges 1Y to 1K. The control unit 50 selectively controls the solenoid 10 (actuator) provided in each of the plurality of locking mechanisms 6. This allows only the toner cartridge determined by the control unit 50 to require replacement to be unlocked by the locking mechanism 6, enabling replacement, while preventing other toner cartridges from being replaced.

[0186] (Other embodiments) In the above-described embodiment, toner cartridges containing toners of different colors have been described as an example of a plurality of cartridges each removably mounted to the main body of the image forming apparatus. However, the cartridges are not limited to this, and may be, for example, process cartridges PY, PM, PC, and PK, each of which is configured to be removably mounted to the main body of the apparatus. A process cartridge is a unit that combines an image carrier (electrophotographic photosensitive member) and one or more process members that act on the image carrier to perform each step of the electrophotographic process. Alternatively, the process cartridge may be an image carrier cartridge (drum cartridge) having an image carrier, a charging device, and a cleaning device, or a developer cartridge having a developer container and a developing roller. [Explanation of symbols]

[0187] 1, 1Y, 1M, 1C, 1K... cartridge (toner cartridge) / 3... operation unit (cartridge fixing lever) / 3a... latched unit / 4a... latching unit / 6... removal restriction means (lock mechanism) / 7... restriction member (lock arm) / 10... actuator (solenoid) / 50... control means (control unit)

Claims

1. A device body, a cartridge that is removably mounted to the apparatus main body, the cartridge having an operating portion that is operated when the cartridge is to be removed from the apparatus main body and that is provided with a locked portion; a removal restriction means provided in the apparatus main body for restricting removal of the cartridge; An image forming apparatus having: The removal restriction means is a locking portion configured to lock the locked portion and restrict movement of the cartridge in a removal direction in which the cartridge is removed from the apparatus main body; a restricting member movable between a first position that restricts operation of the operating portion for releasing the engagement between the engaged portion and the engaging portion and a second position that allows the operation; an actuator that moves the regulating member between the first position and the second position; An image forming apparatus comprising:

2. the engaged portion moves in response to the operation of the operating portion from a locked position where it overlaps with the engaging portion as viewed in the removal direction to a released position where it does not overlap with the engaging portion as viewed in the removal direction.

2. The image forming apparatus according to claim 1, wherein the image forming apparatus is a recording medium.

3. the operating portion is rotatably supported by a frame of the cartridge and configured to be rotated in a predetermined rotation direction during the operation, the restricting member restricts rotation of the operation unit in the predetermined rotation direction when located at the first position, and allows rotation of the operation unit in the predetermined rotation direction when located at the second position; 3. The image forming apparatus according to claim 2, wherein the image forming apparatus is a recording medium.

4. A device body, a cartridge having a latched portion and removably mounted to the device main body, the cartridge having an operating portion that is operated when the cartridge is to be removed from the device main body; a removal restriction means provided in the apparatus main body for restricting removal of the cartridge; An image forming apparatus having: The removal restriction means is a locking portion configured to lock the locked portion and restrict movement of the cartridge in a removal direction in which the cartridge is removed from the apparatus main body; a restricting member movable between a first position that restricts operation of the operating portion for releasing the engagement between the engaged portion and the engaging portion and a second position that allows the operation; an actuator that moves the regulating member between the first position and the second position; and The locking portion is provided so as to be movable between a locking position where it overlaps with the locked portion as viewed in the removal direction and an unlocking position where it does not overlap with the locked portion as viewed in the removal direction, and when the operation portion is operated, the locking portion abuts against the operation portion and moves from the locking position to the unlocking position. An image forming apparatus characterized by:

5. the operating portion is slidably supported by a frame of the cartridge and configured to be moved in a predetermined movement direction during the operation; When the regulating member is located at the first position, it regulates the locking portion from moving together with the operating portion in the predetermined movement direction, and when the regulating member is located at the second position, it allows the locking portion to move together with the operating portion in the predetermined movement direction.

5. The image forming apparatus according to claim 4.

6. A device body, a cartridge having a latched portion and removably attached to the device main body; an operating portion provided in the apparatus main body, which is operated when the cartridge is to be removed from the apparatus main body and which has a locking portion; a removal restriction means provided in the apparatus main body for restricting removal of the cartridge; An image forming apparatus having: The removal restriction means is a locking portion configured to lock the locked portion and restrict movement of the cartridge in a removal direction in which the cartridge is removed from the apparatus main body; a restricting member movable between a first position that restricts operation of the operating portion for releasing the engagement between the engaged portion and the engaging portion and a second position that allows the operation; an actuator that moves the regulating member between the first position and the second position; and the locking portion is configured to move, in response to the operation of the operating portion, from a locking position where it overlaps with the locked portion as viewed in the removal direction to a lock release position where it does not overlap with the locked portion as viewed in the removal direction. An image forming apparatus characterized by:

7. the engaging portion has a recessed shape in which the frame of the cartridge is recessed in a direction intersecting the removal direction, the locking portion has a convex shape that fits into the concave shape when located at the locking position and disengages from the concave shape when located at the unlocking position, When the regulating member is located at the first position, it regulates the movement of the operation unit in a direction in which the convex shape separates from the concave shape, and when the regulating member is located at the second position, it allows the movement of the operation unit in a direction in which the convex shape separates from the concave shape.

7. The image forming apparatus according to claim 6, wherein the image forming apparatus is a recording medium.

8. The cartridge further includes a push-out means for pushing out the cartridge in the removal direction when the engagement between the engaged portion and the engagement portion is released.

8. The image forming apparatus according to claim 1, wherein the image forming apparatus is a recording medium.

9. A device body, a cartridge having an engaged portion and removably mounted to the device main body; a retracting member provided in the apparatus main body, configured to engage with the engaged portion during the process of the cartridge being mounted in the apparatus main body, and to retract the cartridge to a predetermined mounting position in the apparatus main body; a removal restriction means for restricting removal of the cartridge; An image forming apparatus having: The removal restriction means is a restricting member movable between a first position that restricts release of the engagement between the engaged portion and the retracting member and a second position that allows release of the engagement; an actuator that moves the regulating member between the first position and the second position; and the retracting member is rotatable between a first angle at which the retracting member engages with the engaged portion to hold the cartridge at the mounting position and a second angle at which the retracting member disengages from the engaged portion; the restricting member restricts the rotation of the retraction member from the first angle to the second angle when located at the first position, and allows the rotation of the retraction member from the first angle to the second angle when located at the second position. An image forming apparatus characterized by:

10. a spring member provided in the device body and biasing the retraction member toward either the first angle or the second angle with an angle between the first angle and the second angle as a boundary; 10. The image forming apparatus according to claim 9,

11. The actuator is a solenoid.

8. The image forming apparatus according to claim 1, wherein the image forming apparatus is a recording medium.

Images