JP5972131B2 - Image forming apparatus, cartridge, image forming apparatus main body, and cartridge erroneous insertion prevention system - Google Patents

Description

  The present invention relates to an image forming apparatus that forms an image on a recording medium, a cartridge, an image forming apparatus main body, and a cartridge erroneous insertion prevention system.

  Here, the image forming apparatus is an apparatus that forms an image on a recording medium using various known image forming principles and methods such as an electrophotographic process, an electrostatic recording process, and a magnetic recording process. For example, a copying machine, a printer (for example, a laser printer, an LED printer, etc.), a facsimile machine, a word processor, an image display device (an electronic blackboard or an electronic white board), and a complex machine (multifunction printer) thereof are included. The recording medium is an image on which an image is formed by an image forming apparatus, and includes, for example, paper, an OHT sheet, a secondary transfer member, and the like.

  The cartridge is a cartridge in which a part or all of the image forming unit having an image carrier on which an image is formed and an image forming process means acting on the image carrier is integrally formed. Then, it is detachably attached to the image forming apparatus main body, and contributes to an image forming process for forming an image on a recording medium. The main body of the image forming apparatus is a component part of the image forming apparatus excluding the cartridge in the cartridge type image forming apparatus.

  As an image carrier, an image can be formed by an electrophotographic photosensitive member in an electrophotographic process, an electrostatic recording dielectric in an electrostatic recording process, a magnetic recording magnetic material in a magnetic recording process, and various other image forming principles and methods. The member is mentioned. The image forming process means is an image forming process device that acts on the image carrier to form an image.

  Hereinafter, for convenience, a cartridge-type electrophotographic image forming apparatus will be described as an example. Examples of the cartridge include a process cartridge and a developing cartridge.

  The process cartridge can be removed from the main body of the electrophotographic image forming apparatus by integrally forming at least one of charging means, developing means, and cleaning means as an electrophotographic process means and an electrophotographic photosensitive member as an image carrier. It is to be attached to. The electrophotographic image forming apparatus main body is hereinafter referred to as an apparatus main body.

  Accordingly, the process cartridge includes one in which the developing means as the process means and the electrophotographic photosensitive member are integrally formed into a cartridge and detachably attached to the apparatus main body. The process cartridge includes a cartridge in which a charging unit, a developing unit or a cleaning unit and an electrophotographic photosensitive member as process units are integrated into a cartridge and detachably mounted on the apparatus main body.

  A process cartridge having an electrophotographic photosensitive member and developing means integrally is called a so-called integral type. A process cartridge integrally including an electrophotographic photosensitive member and process means other than the developing means is referred to as a so-called separation type. That is, a process cartridge in which the developing means is provided in a developing unit separate from the process cartridge and forms an image in a pair with the developing unit is referred to as a so-called separation type.

  The process cartridge can be attached to and detached from the apparatus main body by the user himself. Therefore, maintenance of the apparatus main body can be easily performed.

  The developing cartridge includes a developing roller (a developer carrying member that applies a developer to the electrophotographic photosensitive member). Further, the developer roller contains a powder developer (toner) used to develop the electrostatic latent image formed on the electrophotographic photosensitive member, and is detachably mounted on the apparatus main body. .

  In the case of a developing cartridge, the electrophotographic photosensitive member is attached to the apparatus main body or a cartridge support member. Alternatively, the electrophotographic photosensitive member is provided in the so-called separation type process cartridge (in this case, the process cartridge does not have a developing unit). The developing cartridge can also be attached to and detached from the apparatus main body by the user himself. Therefore, maintenance of the apparatus main body can be easily performed.

  Therefore, the cartridge includes the so-called integral type or the so-called separation type process cartridge. The cartridge includes a case where a so-called separation type process cartridge and a developing cartridge are used as a pair. The cartridge includes a case where the electrophotographic photosensitive member is fixedly attached to the apparatus main body or the cartridge support member, and the developing cartridge is detachably used so as to act on the electrophotographic photosensitive member. The cartridge includes a unit that is detachably mounted on the apparatus main body and contributes to an image forming process for forming an image on a recording medium.

  In a cartridge type image forming apparatus, not only a cartridge that is compatible with the main body of the image forming apparatus to which the cartridge is mounted but also a cartridge that is not compatible may be mounted in the cartridge mounting portion of the apparatus main body. This is a so-called cartridge insertion error. The cartridge suitable for the image forming apparatus main body is, for example, a cartridge whose product model and color match. Hereinafter, a cartridge that conforms to the main body of the image forming apparatus is referred to as a conforming cartridge, and a cartridge that does not conform is referred to as a nonconforming cartridge.

  The non-conforming cartridge includes a cartridge of a different product model from the image forming apparatus main body. Although it is not a cartridge of a different product model, a plurality of cartridges with different developer colors etc. are mounted in corresponding cartridge mounting portions and used for the image forming apparatus main body. The case where it is mounted is also included.

  Patent Document 1 proposes a method for preventing erroneous insertion of the incompatible cartridge as described above. This is because when a nonconforming cartridge is inserted into the image forming apparatus main body, the cam part that opens and closes the shutter engages with the erroneous insertion prevention engaging part at the opening of the apparatus main body, thereby preventing erroneous insertion. Is the method. In other words, in the above-described configuration, the shutter portion for protecting the photosensitive drum of the cartridge is provided with an engaging portion with the image forming apparatus, and the shutter is opened at an inappropriate position to prevent further insertion.

Japanese Patent No. 3658381

  In the above-described configuration, the compatible cartridge and the non-compatible cartridge are recognized on the downstream side, that is, the back side in the insertion direction, and can be determined by inserting the cartridge into the image forming apparatus to some extent. Further, in the above-described configuration, when several types of erroneous insertion prevention configurations are required, it is necessary to increase a space for arranging the erroneous insertion prevention configuration in the image forming apparatus main body with respect to the engaging portion of the cartridge.

  The present invention is a further development of the above prior art. An object of the present invention is to recognize whether or not it is compatible in the vicinity of a cartridge insertion opening of a main body of an image forming apparatus, and to form several types of erroneous mounting preventing shapes in a small space.

In order to achieve the above object, a typical configuration of an image forming apparatus according to the present invention is an image forming apparatus that forms an image on a recording medium, and includes a first boss and a second boss. and a cartridge detachably mountable to the apparatus main body, a movable table movable between a first position and a second position in which positions are different from the first position when freely state, provided on said carriage and which, inserted into the first respective boss and the second boss engageable first insertion guide portion and the second insertion guide portion has a front Symbol cartridge main body of the image forming apparatus when it is, the first boss, said first entered the insertion guide portion, engaged by moving the movable table in the second position from the first position, prior Symbol carriage when There moved to the second position, the second boss, the second insertion Guy It characterized that you have been the parts and engageable.

  According to the present invention, many types of erroneous insertion preventing shape patterns can be provided in a small arrangement space on the side surface in the mounting direction of the cartridge. In addition, by providing the boss with at least one plane, it is possible to further stabilize prevention of erroneous insertion.

FIG. 3 is a schematic configuration diagram of a movable table provided in the image forming apparatus main body and a first boss and a second boss provided in the cartridge in the first embodiment. 1 is a schematic longitudinal sectional front view of an image forming apparatus in Embodiment 1. FIG. It is a cross-sectional schematic diagram of a cartridge. FIG. 3 is an explanatory diagram illustrating a configuration in which a cartridge is mounted on an image forming apparatus main body. Cartridge is an explanatory view of the first and second bosses kicked set to. 2 is a configuration explanatory diagram of a movable base and an insertion guide provided in the image forming apparatus main body in Embodiment 1. FIG. FIG. 6 is an operation explanatory diagram of a misinsertion prevention configuration when a cartridge compatible with the image forming apparatus main body in Embodiment 1 is inserted. FIG. 6 is an operation explanatory diagram of a configuration for preventing erroneous insertion when a cartridge compatible with the image forming apparatus main body in Embodiment 1 is taken out. 4 is a configuration explanatory diagram of a movable table and an insertion guide portion provided in the image forming main body in Embodiment 1. FIG. FIG. 3 is an explanatory diagram of first and second bosses provided in the cartridge in the first embodiment. FIG. 6 is an operation explanatory diagram of an erroneous insertion prevention configuration when a cartridge that is not compatible with the image forming apparatus main body according to the first exemplary embodiment is inserted. FIG. 6 is an operation explanatory diagram of an erroneous insertion prevention configuration when a cartridge that is not compatible with the image forming apparatus main body according to the first exemplary embodiment is inserted. FIG. 6 is an explanatory diagram illustrating a state in which the position of the second boss is displaced with respect to the movable base when a cartridge that is not compatible with the image forming apparatus main body in Embodiment 1 is inserted. It is explanatory drawing of the 1st and 2nd boss | hub provided in the cartridge for performing the incorrect insertion prevention structure in Example 1 more stably. FIG. 6 is an operation explanatory diagram of an erroneous insertion prevention configuration when a cartridge including a boss shape for more stably performing the erroneous insertion prevention configuration in Embodiment 1 is inserted into an incompatible image forming apparatus main body. FIG. 6 is an operation explanatory diagram of a stopper member when the cartridge in Embodiment 1 is inserted into a compatible image forming apparatus main body. It is operation | movement explanatory drawing of the interlocking | linkage structure of a movable stand and a stopper member. FIG. 6 is an explanatory diagram of first and second bosses provided in a cartridge having the same effect in the configuration of Embodiment 1. FIG. 3 is a configuration explanatory diagram of a movable base and an insertion guide provided in an image forming apparatus main body having the same effect in the configuration of Embodiment 1; FIG. 10 is a configuration explanatory diagram of a movable table and first and second bosses provided in a cartridge according to a second embodiment. FIG. 10 is a configuration explanatory diagram of an insertion guide portion provided in an image forming apparatus main body in Embodiment 2. FIG. 10 is an operation explanatory diagram of a misinsertion prevention configuration when a cartridge compatible with the image forming apparatus main body in Embodiment 2 is inserted. FIG. 10 is a configuration explanatory diagram of an insertion guide portion provided in a cartridge according to a third embodiment. FIG. 9 is a configuration explanatory diagram of a movable table and first and second bosses provided in an image forming apparatus main body in Embodiment 3.

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

Example 1
[Overall schematic configuration of image forming apparatus example]
(overall structure)
FIG. 2 is a longitudinal front view showing a schematic configuration of the image forming apparatus 100 in this embodiment. The image forming apparatus 100 of this embodiment is a four-color full-color laser beam printer (color electrophotographic image forming apparatus) using an electrophotographic image forming process. That is, a sheet-like recording medium (paper, OHP sheet, envelope, postcard, label) S based on electrical image information input from a host device (not shown) such as a personal computer / image reader to a control circuit (not shown) An image can be formed.

  This image forming apparatus 100 is a system in which a plurality of process cartridges (hereinafter referred to as cartridges) are detachably attached to an image forming apparatus main body (hereinafter referred to as apparatus main body) 100A. In this embodiment, the first to fourth four cartridges 70 (70Y, 70M, 70C, 70K) having different developer colors are detachably attached to the apparatus main body 100A. is there. The apparatus main body 100A is a configuration obtained by removing the cartridge 70 from the configuration of the image forming apparatus 100.

  The first cartridge 70Y contains yellow (Y) toner as a developer, and forms a Y toner image on an electrophotographic photosensitive drum (hereinafter referred to as drum) 1a. The second cartridge 70M contains magenta (M) toner as a developer, and forms an M toner image on the drum 1b. The third cartridge 70C contains cyan (C) toner as a developer, and forms a C toner image on the drum 1c. The fourth cartridge 70K contains black (K) toner as a developer, and forms a K toner image on the drum 1d.

  In each cartridge 70, one end side in the drum rotation axis direction is defined as a front side surface, and the other end side is defined as a back side surface side. Each of the first to fourth cartridges 70 is mounted on a predetermined mounting portion (in the apparatus main body 100A) with respect to a predetermined mounting portion that is sequentially arranged from the left side to the right side in FIG. (Not shown).

  Each cartridge 70 is mounted by a mounting member (not shown) with the front side as viewed from the front and the rear side as viewed from the front side of the apparatus main body 100A. Each cartridge 70 is mounted from the front side of the apparatus main body 100A with the front side surface being the upstream side in the mounting direction and the back side surface being the downstream side in the mounting direction with respect to the respective mounting portions, and is taken out in the opposite direction.

  In this embodiment, each cartridge 70 is a so-called integrated process cartridge. That is, each cartridge 70 has an electrophotographic photosensitive drum 1 (1a, 1b, 1c, 1d) as an image carrier. Further, process means acting on the drum 1 are integrally disposed around the drum 1. In this embodiment, as the process means, the charging roller 2 (2a, 2b, 2c, 2d), the developing roller 25 (25a, 25b, 25c, 25d), and the cleaning member 6 (6a, 6b, 6c, 6d). ) Is arranged.

  The charging roller 2 uniformly charges the surface of the drum 1. The developing roller 25 develops the latent image formed on the drum 1 with toner to make a visible image. The cleaning member 6 removes the toner remaining on the drum 1 after the toner image formed on the drum 1 is transferred to the recording medium S.

  In the apparatus main body 100A, a scanner unit 3 is provided below each cartridge 70 for selectively exposing the drum 1 based on image information and forming a latent image on the drum 1.

  A cassette 17 that stores the recording medium S is mounted below the scanner unit 3. On the right side of the apparatus main body 100A, a recording medium conveying means is provided so that the recording medium S passes through the secondary transfer roller 69 and the fixing unit 74 and is conveyed above the apparatus main body 100A. That is, the feeding roller 54 for separating and feeding the recording medium S in the cassette 17 one by one, the conveying roller pair 76 for feeding the fed recording medium S, the latent image formed on the drum 1 and the recording medium S A registration roller pair 55 is provided for synchronizing the two.

  Further, in the apparatus main body 100A, an intermediate transfer unit 5 is provided above each cartridge 70 as intermediate transfer means for transferring a toner image formed on each drum 1. The unit 5 includes a driving roller 56, a driven roller 57, a primary transfer roller 58 (58a, 58b, 58c, 58d) at a position facing the drum 1 of each color, and a counter roller 59 at a position facing the secondary transfer roller 69. The transfer belt 9 is stretched over the belt.

  The transfer belt 9 circulates and moves so as to face and be in contact with all the drums 1 and applies a voltage to the primary transfer roller 58 to perform primary transfer from the drum 1 onto the transfer belt 9. The toner on the transfer belt 9 is transferred to the recording medium S by applying a voltage to the opposing roller 59 and the secondary transfer roller 69 disposed in the transfer belt 9.

  At the time of image formation, each drum 1 is rotationally driven in the clockwise direction indicated by an arrow at a predetermined peripheral speed. The transfer belt 9 is also driven to rotate in a counterclockwise direction indicated by an arrow A at a speed corresponding to the peripheral speed of the drum 1. The scanner unit 3 selectively exposes the drum 1 uniformly charged by the charging roller 2. As a result, an electrostatic latent image is formed on the drum 1. The latent image is developed by the developing roller 25. Thus, each color toner image is formed on each drum 1. As a result, a superimposed transfer toner image of Y color + M color + C color + K color is formed on the transfer belt 9.

  On the other hand, in synchronization with this image formation, the registration roller pair 55 conveys the recording medium S to the secondary transfer position where the opposing roller 59 and the secondary transfer roller 69 are in contact with each other with the transfer belt 9 interposed therebetween. Then, by applying a transfer bias voltage to the secondary transfer roller 69, the superimposed transfer toner images of the respective colors on the transfer belt are secondarily transferred sequentially to the recording medium S. As a result, an unfixed color image is formed on the recording medium S.

  The recording medium S that has passed the secondary transfer position is separated from the transfer belt 9 and introduced into the fixing unit 74, and is heated and pressurized to fix the toner image. Thereafter, the recording medium S is discharged to the discharge unit 75 by the discharge roller 72. The fixing unit 74 is disposed on the upper part of the apparatus main body 100. Reference numeral 71 denotes a cleaning device for the transfer belt 9, which removes the secondary transfer residual toner on the transfer belt 9 and accommodates it in the container 71a.

(cartridge)
FIG. 3 is a main cross section of the cartridge 70 containing the toner. The first cartridge 70Y containing Y toner, the second cartridge 70M containing M toner, the third cartridge 70C containing C toner, and the cartridge 70K containing K toner are the same. It is a configuration.

  The cartridge 70 includes the cleaning unit 26 (26a, 26b, 26c, 26d) and the developing unit 4 (4a, 4b, 4c, 4d). The cleaning unit 26 includes a drum 1, a charging roller 2, and a cleaning member 6 in a cleaning frame 27. The developing unit 4 includes a developing roller 25.

  The developing unit 4 is coupled to the cleaning unit 26 so as to be swingable about the hinge portion 14. In the free state, the developing unit 4 is urged to rotate about the hinge portion 14 in the direction in which the developing roller 25 contacts the drum 1 with a predetermined pressing force by the urging force of the urging member 38.

  In a state where the cartridge 70 is mounted in the apparatus main body 100A, the developing unit 4 is in a free state and the developing roller 25 is in contact with the drum 1 during image formation. During non-image formation, the pressed portion 31b of the developing unit 4 is pressed against the biasing force of the biasing member 38 by the pressing member 8 (8a, 8b, 8c, 8d) on the apparatus main body 100A side. As a result, the developing unit 4 is held in a state where the developing roller 25 is rotated in a direction away from the drum 1 around the hinge portion 14 (resting state of the developing roller 25).

  In the cleaning unit 26, the charging roller 2 and the cleaning member 6 are disposed on the circumference of the drum 1 as described above. The cleaning member 6 includes an elastic member 7 formed of a rubber blade and a cleaning support member 8. The tip 7 a of the rubber blade 7 is disposed in contact with the rotation direction of the drum 1 in the counter direction. The residual toner removed from the surface of the drum 1 by the cleaning member 6 falls into the removed toner chamber 27a. Further, a squeeze sheet 21 that prevents the removed toner in the removed toner chamber 27 a from leaking is in contact with the drum 1. Reference numeral 40 denotes a side seal member.

  Then, the driving force of a main body driving motor (not shown) as a driving source is transmitted to the cleaning unit 26, so that the drum 1 is rotationally driven according to the image forming operation. The charging roller 2 is rotatably attached to the cleaning unit 26 via the charging roller bearing 28, and is pressurized toward the drum 1 by the charging roller pressing member 46, and is rotated following the drum 1.

  The developing unit 4 includes a developing roller 25 that contacts the drum 1 and rotates in the direction of arrow B, a developing frame 31 that supports the developing roller 25, a developing blade 35, and the like. The developing roller 25 is rotatably supported by the developing frame 31 via a pre-development bearing (not shown) and a developing back bearing (not shown) attached to both sides of the developing frame 31, respectively. Further, on the circumference of the developing roller 25, there are a toner supply roller 34 that contacts the developing roller 25 and rotates in the direction of arrow C, and a developing blade 35 for restricting the toner layer on the developing roller 25 by the tip 35a. Has been placed.

  Further, a blowout prevention sheet 20 as a development contact sheet for preventing the toner from leaking from the development frame body 31 in contact with the development roller 25 is disposed. Further, the toner storage chamber 31 a of the developing frame 31 is provided with a toner transport member 36 for stirring the stored toner and transporting the toner to the toner supply roller 34.

(Cartridge replacement method)
As each of the first to fourth cartridges 70 is used for image formation, the developer stored in the developing unit 4 is consumed. Therefore, for example, a detection unit (not shown) for detecting the remaining amount of developer in each cartridge is provided in the cartridge. In the control circuit unit, the remaining amount value detected by the detecting means is compared with a preset threshold value for cartridge life warning or life warning.

  For a cartridge in which the developer has decreased to a remaining amount value that is less than the threshold value, a life warning or a life warning for the cartridge is displayed on a display unit (not shown). As a result, the user is urged to prepare a replacement cartridge or to replace the cartridge, thereby maintaining the quality of the output image.

  In the image forming apparatus 100 of the present embodiment, the replacement of the cartridge with respect to the apparatus main body 100A is a system in which the front door of the apparatus main body 100A is opened and replaced by front access.

  As shown in FIG. 4, an opening 101 (101a, 101b, 101c, 101d) through which each cartridge 70 passes is provided in the front frame 100A1, which is the skeleton of the apparatus main body 100A. That is, an opening 101 is provided for inserting each cartridge 70 into each cartridge mounting portion in the apparatus main body 101A and for taking out the cartridge 70 from the cartridge mounting portion.

  A front door (not shown) that can be opened and closed with respect to the front frame 100A1 is disposed on the front side of the apparatus main body 100A. And the opening part 101 is closed by the front door being closed. Further, the opening 101 is opened as shown in FIG. 4 by opening the front door. The cartridge 70 is inserted and removed from the opening 101 by front access.

  In the present embodiment, the configuration in which each cartridge 70 is inserted into the opening 101 is a direction parallel to the rotational axis direction of the drum 1 (in the direction of arrow F in FIG. 4), with the back side of the cartridge 70 first. It is configured to be inserted from the near side toward the far side. In this embodiment, the upstream side in the insertion direction of the cartridge 70 is defined as the near side, and the downstream side is defined as the back side.

  Further, in the mounting portion of each cartridge in the apparatus main body 100, a main body mounting upper guide portion 103 (103a, 103b, 103c, 103d) which is a first main body guide portion is provided on the upper side. In addition, a main body mounting lower guide portion 102 (102a, 102b, 102c, 102d) which is a second main body guide portion is provided on the lower side.

  The main body mounting upper guide portion 103 and the main body mounting lower guide portion 102 each have a guide shape extending along the insertion direction F of the cartridge 70. The back side of the cartridge 70 is placed on the front side of the main body mounting lower guide portion 102 in the mounting direction, and the cartridge 70 is moved in the insertion direction F along the main body mounting upper guide portion 103 and the main body mounting lower guide portion 102. By doing so, it is inserted into the apparatus main body 100A. Further, the cartridge 70 is taken out from the apparatus main body 100A by pulling out the cartridge 70 in the reverse direction F '.

  When the new cartridge is replaced with the new cartridge 70 as described above, the front door is closed. By the operation of an interlocking mechanism (not shown) that interlocks with the closing movement of the front door, the cleaning unit 26 of the cartridge 70 inserted in the cartridge mounting portion is positioned and fixed to a positioning portion (not shown) on the apparatus main body 100A side. .

  Further, the drive output unit (not shown) on the apparatus main body 100A side is coupled to the drive force receiving unit (not shown) of the cartridge B. Further, the electrical contact portion (not shown) on the cartridge 70 side is electrically connected to the electrical contact portion (not shown) on the apparatus main body 100A side. In this state, the image forming apparatus 100 can perform an image forming operation.

  Conversely, when the front door is opened, the positioning and fixing of the cleaning unit 26 of the cartridge 70 with respect to the positioning portion on the apparatus main body 100A side is released by the operation of the interlocking mechanism that interlocks with the opening movement of the front door. Further, the coupling of the driving output unit on the apparatus main body 100A side to the driving force receiving unit of the cartridge B is released. In this state, each cartridge 70 can be taken out.

(Configuration to prevent incorrect cartridge insertion)
According to the present invention, only a cartridge 70 that conforms to a specific image forming apparatus 100 can be mounted on the apparatus main body 100A, and there is a configuration for preventing erroneous insertion to prevent an unsuitable cartridge from being erroneously inserted.

  Hereinafter, the apparatus main body of a specific image forming apparatus will be referred to as apparatus main bodies 100Aa and 100Aa ', and the cartridges suitable for the apparatus main bodies 100Aa and 100Aa' will be referred to as cartridges 70Aa and 70Aa ', respectively. The form of Example 1 of this invention is demonstrated using FIG. 1, FIG. 5 to FIG.

1) In the case of the apparatus main body 100Aa-cartridge 70Aa First, a basic configuration will be described using the apparatus main body 100Aa and a cartridge 70Aa that is compatible and attachable to the apparatus main body 100Aa.

  FIG. 1 is an overall configuration diagram of a movable base 110a provided in the image forming apparatus main body 100Aa and a first boss 80 and a second boss 81 provided in the cartridge 70Aa in the embodiment. 5 is a configuration diagram of the first boss 80 and the second boss 81 provided in the cartridge 70Aa, and FIG. 6 is a configuration diagram of the movable base 110a provided in the image forming apparatus main body 100Aa.

  Referring to FIGS. 1, 5, and 6, on the cartridge 70 </ b> Aa side, a first boss 80 on the downstream side in the cartridge insertion direction F, and an upstream in the cartridge insertion direction F with respect to the first boss 80. A second boss 81 is provided on the side.

  On the apparatus main body 100Aa side, a lower mounting guide 102 that guides insertion of the cartridge 70Aa, a movable base 110a, and a biasing spring 111 that biases the movable base 110a to a predetermined position are provided. The movable base 110a engages with the first and second bosses 80 and 81 provided on the cartridge 70Aa when the cartridge is inserted, and the first position X in the free state and the first position X are It is provided so as to be movable between the second positions Y having different positions.

  The movable table 110a includes a guide upper part 120, a guide middle part 121, and a guide lower part 122. The first insertion guide portion 123 is formed by a guide upper portion 120 and a guide middle portion 121. The second insertion guide part 124 is formed by a guide middle part 121 and a guide lower part 122.

  The first insertion guide portion 123 has a labyrinth shape including the inclined surface 123a, the first flat surface portion 123b, the concave flat surface portion 123c, and the like, and is formed with a size that can be engaged with the first boss 80. ing.

  The second insertion guide portion 124 has a labyrinth shape including the first flat surface portion 124 a, the inclined surface 124 b, the second flat surface portion 124 c, and the like, and is formed with a size that can be engaged with the second boss 81. ing.

  Further, as shown in FIG. 6A, a stopper member 112 that moves in conjunction with the movement of the movable base 110a is provided on the apparatus main body 100Aa side. The interlocking mechanism that connects the movable base 110a and the stopper member 112 will be described later.

  FIGS. 6A and 6C show the movable base 110a in a free state. In the free state, the movable table 110 a is received by the lower surface of the guide lower portion 122 pressing against the upper surface of the lower guide 102 by the biasing force of the biasing spring 111 disposed on the upper surface side of the guide upper portion 120. This position of the movable base 110a is set as a first position X. On the other hand, FIG. 1 shows a state in which the movable base 110a is moved to the second position Y, which is different from the first position X, by the engagement of the first and second bosses 80 and 81. In this state, the movable base 110a is moved up by a predetermined amount from the first position X against the biasing force of the biasing spring 111.

  Next, the relationship between the first boss 80 and the second boss 81 of the cartridge 70Aa and the movable base 110a provided in the apparatus 100Aa when the cartridge 70Aa that is compatible with the apparatus main body 100Aa is inserted is shown in FIG. This will be described with reference to (a) to (f). Here, in each of FIGS. 7A to 7F, the left side indicates the front side of the apparatus main body 100Aa, and the right side indicates the back side.

  (A): Before insertion of the cartridge 70Aa, the movable base 110a is in a free state and is located at the first position X. When the cartridge 70Aa moves in the insertion direction F, the first boss 80 provided on the cartridge 70Aa and the first insertion guide portion 123 provided on the movable base 110a are engaged.

  (B): When the cartridge 70Aa further moves in the insertion direction F, the first boss 80 comes into contact with the inclined surface 123a provided at the entrance of the first insertion guide portion 123, so that the movable base 110a receives a force from the cartridge 70a. receive.

  Then, the movable base 110 a that has been urged downward by the urging spring 111 moves upward in the direction of the arrow G against the urging force of the urging spring 111.

  (C): Further, when the cartridge 70Aa moves in the insertion direction F, the first boss 80 reaches the first flat surface portion 123b of the first insertion guide portion 123, and the movable base 110a moves to a predetermined second It is lifted and moved to position Y. If it does so, it will be in the positional relationship which the 2nd insertion guide part 124 of the movable stand 110a which moved to the 2nd position Y and the 2nd boss | hub 81 provided in cartridge 70Aa can engage.

  (D): When the cartridge 70Aa further moves in the insertion direction F, the second boss 81 provided on the cartridge 70Aa engaged with the second insertion guide 124 and the first plane portion of the second insertion guide portion 124 124a contacts. Accordingly, the cartridge 70Aa is inserted while the movable base 110a is held at the second position Y.

  (E): When the cartridge 70Aa further moves in the insertion direction F, the second boss 81 provided on the cartridge 70Aa moves to the position of the inclined surface 124b of the second insertion guide. Then, with the insertion of the cartridge 70Aa, the movable base 110a moves downward in the direction of the arrow H and moves back to the first position X.

  (F): Further, the cartridge 70Aa is sufficiently inserted in the insertion direction F. As described above, the cartridge 70Aa suitable for the apparatus 100Aa can be inserted.

  Next, the relationship between the first boss 80 and the second boss 81 of the cartridge 70Aa and the movable base 110a when the cartridge 70Aa mounted on the apparatus 100Aa is taken out will be described with reference to FIGS. I will explain. That is, the first boss 80 and the second boss 81 when the cartridge 70 </ b> Aa located in the cartridge mounting portion of the apparatus main body 100 </ b> Aa moves in the take-out direction F ′ from the back side to the front side of the opening 101. And the relationship between the movable table 110a will be described.

  (A): In a state where the cartridge 70Aa is sufficiently inserted into the apparatus main body 100Aa, the movable base 110a is in a free state and is located at the first position X.

  (B): When the cartridge 70 </ b> Aa moves in the take-out direction F ′, the second boss 81 is engaged with the second insertion guide portion 124 and abuts on the second inclined surface 124 b of the insertion guide portion 124.

  (C): When the cartridge 70Aa further moves in the take-out direction F ', the second boss provided on the cartridge 70Aa comes into contact with the second inclined surface 124b of the movable base 110a. As a result, the movable base 110a receives a force from the cartridge 70Aa, and the movable base 110a that has been urged to the first position X by the urging spring 111 moves upward in the direction of the arrow G to the second position Y. Lifted. As a result, the first boss 80 provided on the cartridge 70Aa is also engaged with the insertion guide portion 123 of the movable base 110a.

  (D): When the cartridge 70Aa further moves in the take-out direction F ′, the second boss 81 provided on the cartridge 70Aa engaged with the second insertion guide 124 and the first plane of the second insertion guide portion 124. The part 124a contacts. Thus, the cartridge 70Aa is taken out while the movable base 110a is held at the second position Y.

  (E): When the cartridge 70Aa further moves in the take-out direction F ', the first boss 80 provided on the cartridge 70Aa moves to the position of the inclined surface 123a of the first insertion guide of the movable base 110a. Then, the movable table 110a moves downward in the direction of the arrow H as the cartridge 70Aa is taken out.

  (F) Further, the cartridge 70Aa can be removed from the apparatus 100Aa by moving the cartridge 70Aa in the removal direction F '.

2) In the case of the apparatus main body 100Aa-cartridge 70Aa ′ First, the apparatus main body 100Aa ′ whose position is different from that of the apparatus main body 100Aa described above and the cartridge 70Aa ′ adapted to the apparatus main body 100Aa ′ will be described.

  As shown in FIG. 9, in the apparatus main body A100Aa ′, the positions of the inclined surface 123a and the first flat surface portion 123b of the first insertion portion 123 provided on the movable base 110a ′ are shifted with respect to the movable base 110a. Shape. A broken line part is the position of the slope 123a of 110a, and the 1st plane part 123b.

  As shown in FIG. 10, the cartridge 70Aa ′ has a shape in which the position of the second boss 81 is shifted with respect to the second boss 81 of the cartridge 70Aa (the broken line indicates the position of the second boss 81 of the cartridge 70Aa). ). That is, the distance between the first boss 80 and the second boss 81 is different.

  Next, a case where a cartridge 70Aa 'that is not compatible with the apparatus 100Aa is inserted will be described. That is, the relationship between the first boss 80 and the second boss 81 of the cartridge 70Aa ′ and the movable base 110a when the cartridge 70Aa ′ moves from the front side to the back side of the opening 101 of the apparatus main body 100Aa. This will be described with reference to (a) to (c) of FIG.

  (A): Before insertion of the cartridge 70Aa, the movable base 110a is in a free state and is located at the first position X. When the cartridge 70Aa 'moves in the insertion direction F, the first boss 80 provided on the cartridge 70Aa' and the first insertion guide portion 123 provided on the movable base 110a are engaged.

  (B): When the cartridge 70 </ b> Aa ′ further moves in the insertion direction F, the movable table 110 a receives force from the cartridge 70 </ b> Aa ′ by coming into contact with the inclined surface 123 a provided at the entrance of the first insertion guide portion 123. Then, the movable base 110a urged to the first position X by the urging spring 111 moves upward in the direction of the arrow G and is lifted to the second position Y.

  (C) When the cartridge 70 </ b> Aa ′ further moves in the insertion direction F, the first boss 80 provided on the cartridge 70 </ b> Aa ′ moves to the concave flat surface portion 123 c of the first insertion guide 123.

  As a result, the movable base 110a moves downward in the direction of the arrow H and moves to the first position X. For this reason, the second boss 81 of the cartridge 70Aa 'cannot be engaged with the insertion guide portion 124 of the movable base 110a. That is, erroneous insertion of the cartridge 70Aa 'that is incompatible with the apparatus main body 100Aa is prevented.

3) In the case of apparatus main body 100Aa′-cartridge 70Aa A case where a cartridge 70a that is not compatible with the apparatus main body 100Aa ′ is inserted will be described. That is, the relationship between the first boss 80 and the second boss 81 of the cartridge 70Aa and the movable base 110a ′ when the cartridge 70Aa moves from the front side to the back side of the opening 101 of the apparatus main body 100Aa ′. This will be described with reference to (a) and (b) of FIG.

  (A): Before insertion of the cartridge 70Aa, the movable base 110a 'of the apparatus main body 100Aa' is in a free state and is located at the first position X. When the cartridge 70Aa moves in the insertion direction F, the first boss 80 provided on the cartridge 70Aa and the first insertion guide portion 123 provided on the movable base 110a 'are engaged.

  (B): When the cartridge 70Aa further moves in the insertion direction F, the second boss 81 provided on the cartridge 70Aa comes into contact with the flat surface portion 121d of the guide middle portion 121 of the movable base 110a '.

  As a result, the second boss 81 of the cartridge 70Aa cannot engage with the insertion guide portion 124 of the movable base 110a 'that is still in the first position X. That is, erroneous insertion of the cartridge 70a that is not compatible with the apparatus main body 100Aa 'is prevented.

  As described above, since the cartridges 70Aa 'and 70Aa that are not compatible with the apparatus main bodies 100Aa and 100Aa' cannot be inserted, it is possible to prevent the cartridges 70Aa 'and 70Aa that are not compatible from being erroneously inserted.

  However, for example, the following states may occur due to variations in dimensions of the first and second bosses 80 and 81 provided in the cartridge 70Aa 'and the insertion guide portions 123 and 124 provided in the apparatus 100Aa. That is, as shown in FIG. 13, the position may deviate from the position of the second boss 81 (broken line portion) having a nominal size with respect to the second insertion guide portion 124.

  Then, when the second boss 81 and the second insertion guide portion 124 have a positional relationship as shown in FIG. 13, the cartridge 70 </ b> Aa that does not fit because the guide middle portion 121 of the apparatus 100 </ b> Aa rides on the second boss 81. 'May be inserted.

  Therefore, as shown in FIG. 14, the second boss 81 'provided on the cartridge 70Ap is shaped to have at least one flat surface 81'a in the cartridge insertion direction. Accordingly, as shown in FIG. 15, the second boss 81 ′ and the guide middle portion 121 abut each other on the surface.

  That is, even when the position of the second boss 81 ′ with respect to the second insertion guide portion 124 is shifted due to variations in the dimensions of the first and second bosses 80 and 81 and the insertion guide portions 123 and 124, The boss 81 'and the guide middle part 121 face each other. Therefore, it becomes possible to more stably prevent the incompatible process cartridge 70p from being erroneously inserted.

  Further, as shown in FIG. 16A (a), in the apparatus 100Aa, when the cartridge 70Aa is not inserted, the stopper member 112 protrudes to a position where it comes into contact with the cartridge 70Aa in the main body mounting lower guide portion 102.

  Further, as shown in FIG. 16A (b), the cartridge 70Aa is inserted, and the movable base 110a is moved above the arrow G by the first and second bosses 80 and 81. Then, the stopper member 112 connected to the movable base 110a by the cam link is retracted in the arrow S direction. As a result, the cartridge 70Aa can be inserted.

An example of a configuration for operating the stopper member 112 is shown in FIGS. 16B and 16B. Connected to both of the protruding portions 112a which kicked setting the protrusion 110a and the stopper member 112 provided on the movable base 110a, the slider link 114 is provided with a cam profile.

  (A) has shown the state at the time of the movable stand 110a being located in the 1st position X. FIG. In this state, the stopper member 112 protrudes to a position where it comes into contact with the inserted cartridge 70Aa.

  In the state of (a), the cartridge 70Aa is inserted into the apparatus main body 100Aa, and the movable base 110a is moved above the arrow G as shown in (b) by the first and second bosses 80 and 81. That is, when the movable base 110a moves to the second position Y, the slider link 114 moves in the arrow T direction along the cam shape. Accordingly, the stopper member 112 also moves in the arrow S direction along the cam shape. That is, the stopper member 112 is retracted to a position where it does not hit the cartridge 70Aa to be inserted.

  On the other hand, when the movable base 110a moves downward, the slider link 114 moves in the direction opposite to the arrow T direction along the cam shape. Accordingly, the stopper member 112 also moves in the direction opposite to the arrow S direction along the cam shape and returns to the state (a).

  Therefore, for example, at least one of the first boss 80 or the second boss 81 provided in the cartridge 70Aa / 70Aa ′ is lost due to damage or the like, and the cartridge 70a / 70a ′ that cannot move the movable base 110a is inserted. Consider the case. In this case, since it is not possible to recognize whether the cartridge 70Aa is suitable for the apparatus main body 100Aa, the movable base 110a is held at the first position X, and the stopper member 112 interlocked with the movable base 110a does not move.

  Therefore, the cartridges 70Aa and 70Aa 'abut against the stopper member 112, thereby preventing the cartridges 70Aa and 70Aa' from being inserted, and preventing the incompatible cartridges 70Aa 'from being inserted by mistake.

  Further, as long as the arrangement is possible, the longitudinal arrangement of the first boss 80 and the second boss 81 or 81 ′ and the engagement position of the insertion guide portion 123 of the movable base 110 may be different as described above. I can do it. In addition, as shown in FIG. 17, the arrangement of the first boss 80 and the second boss 81 or 81 'of the cartridge 70 in the short side direction can be reversed upside down. In addition, as shown in FIG. 18, the first guide portion 123 and the second guide portion 124 provided on the movable base 110b are turned upside down to create several types of configurations having the same effect. Can do.

(Summary)
To summarize the configuration of the first embodiment, the configuration of the image forming apparatus 100 is as follows.

  1) An image forming apparatus 100 that forms an image on a recording medium S. It has a first boss 80 and a second boss 81, and has a cartridge 70Aa that can be attached to and detached from the image forming apparatus main body 100Aa.

Also, having a first position X and the first position the movable carriage 110a and a second position Y position is different from the X at free state. The movable table 110 a includes a first insertion guide portion 123 and a second insertion guide portion 124 that are respectively engageable with the first boss 80 and the second boss 81.

Then, when the front Symbol cartridge 70Aa is inserted into the image forming apparatus main body 100Aa, the first boss 80 is penetrated into the first insertion guide portion 123, the said movable bar 110a engages It is moved to the second position Y from the first position X. When prior Symbol carriage 110a is moved to the second position Y, the second boss 81 is engageable with the second insertion guide portion 124.

When retrieving 2) before Symbol cartridge 70Aa from the image forming apparatus main body 100Aa, the second boss 81, the second insertion guide portion 124 engaged with the said movable table 110a in the first position X It is moved to the second position Y from. When prior Symbol carriage 110a is moved to the second position Y, the first boss 80, that is engageable with the first insertion guide portion 123.

3) The second boss 81 is provided with a flat surface 81′a extending in the cartridge insertion direction F.

  The configuration of the cartridge 70Aa is as follows.

1) of the image forming apparatus 100 for forming an image on a recording medium S, a first insertion guide portion and the cartridge 70Aa detachable and second insertion guide portion, the image forming apparatus main body 100Aa having. Moreover, it has the movable stand 110a which can move between the 1st position X in the free state and the 2nd position Y from which the said 1st position X differs. Further, it has a first insertion guide portion 123 and a second insertion guide portion 124 provided on the movable base 110a.

The cartridge 70Aa has a first boss 80 and a second boss (81) that can be engaged with the first insertion guide portion 123 and the second insertion guide portion 124, respectively. When the cartridge 70 </ b> Aa is inserted into the image forming apparatus main body 100 </ b> Aa, the first boss 80 enters and engages with the first insertion guide portion 123 , thereby moving the movable stand 110 a to the first. 1 position X moves to the second position Y. When the carriage 110a is moved to the second position Y, the second boss 81, that is with the second insertion guide portion 124 and engageable.

When retrieving 2) before Symbol cartridge 70Aa from the image forming apparatus main body 100Aa, the second boss 81, the second insertion guide portion 124 engaged with the said movable table 110a in the first position X It is moved to the second position Y from. When prior Symbol carriage 110a is moved to the second position Y, the first boss 80, that is engageable with the first insertion guide portion 123.

3) The second boss 81 is provided with a flat surface 81′a extending in the cartridge insertion direction F.

  The configuration of the image forming apparatus main body 100Aa is as follows.

  1) The image forming apparatus main body 100Aa of the image forming apparatus 100 in which the cartridge 70Aa having the first boss 80 and the second boss 81 is detachable and forms an image on the recording medium S.

Also, having a first position X and the first position the movable carriage 110a and a second position Y position is different from the X at free state. The movable table 110 a includes a first insertion guide portion 123 and a second insertion guide portion 124 that are respectively engageable with the first boss 80 and the second boss 81.

Then, when the front Symbol cartridge 70Aa is inserted into the image forming apparatus main body 100Aa, the first insertion guide portion 123, the first boss 80 and engaged with the movable table 110a the first from position X moves to the second position Y. When prior Symbol carriage 110a is moved to the second position Y, the second insertion guide portion 124 is engageable with the second boss 81.

3) pre-Symbol cartridge 70Aa during removal from the image forming apparatus main body 100Aa, the second insertion guide portion 124, wherein the second boss 81 and engaged with the movable table 110a first position X It is moved to the second position Y from. When prior Symbol carriage 110a is moved to the second position Y, the first insertion guide unit 123, that is engageable with the first boss 80.

  The configuration of the cartridge erroneous insertion prevention system is as follows.

  This is an erroneous insertion prevention system for a cartridge 70Aa that can be attached to and detached from the image forming apparatus main body 100Aa of the image forming apparatus 100 that forms an image on the recording medium S. The cartridge 70 </ b> Aa has a first boss 80 and a second boss 81.

Also, having a first position X and the first position the movable carriage 110a and a second position Y position is different from the X at free state. The movable table 110a includes a first insertion guide portion 123 and a second insertion guide portion 124 that are respectively engageable with the first boss 80 and the second boss 81.

Then, when the front Symbol cartridge 70Aa is inserted into the image forming apparatus main body 100Aa, the first insertion guide portion 123, the first boss 80 and engaged with the movable table 110a the first from position X moves to the second position Y. When prior Symbol carriage 110a is moved to the second position Y, the second insertion guide portion 124 that is engageable with the second boss 81.

Example 2
The second embodiment is another configuration capable of obtaining the same effect as the first embodiment. A basic configuration will be described using an image forming apparatus 100Ae and a cartridge 70Ae that is compatible and insertable with the image forming apparatus 100Ae. Since the overall schematic configuration of the apparatus main body 100Ae and the cartridge 70Ae according to the second embodiment is the same as the configuration described in the first embodiment, a description thereof will be omitted.

  The configuration of the second embodiment will be described with reference to FIGS. In the second embodiment, the movable base 110a provided in the apparatus main body 100Aa in the first embodiment is provided in the cartridge 70Ae.

  As shown in FIG. 19, the cartridge 70Ae is provided with a movable base 110e that is movably provided and a biasing spring 111 that biases the movable base 110e to a predetermined position. Further, the movable base 110e is provided with a first boss 80 on the upstream side in the cartridge insertion direction and a second boss 81 on the downstream side in the cartridge insertion direction with respect to the first boss 80.

  As shown in FIG. 20, the apparatus main body 100Ae is provided with a lower mounting guide 102 for guiding the mounting of the cartridge 70Ae. Further, a guide upper portion 120, a guide middle portion 121, and a guide lower portion 122 are provided which engage with and guide the first and second bosses 80 and 81 provided on the cartridge 70Ae when the cartridge is inserted.

  The first insertion guide portion 123 is formed by a guide upper portion 120 and a guide middle portion 121, and the second insertion guide portion 124 is formed by a guide middle portion 121 and a guide lower portion 122. The first insertion guide portion 123 has a labyrinth shape including the inclined surface 123a, the first flat surface portion 123b, the concave flat surface portion 123c, and the like, and is formed with a size that can be engaged with the first boss 80. ing. The second insertion guide portion 124 has a labyrinth shape including the first flat surface portion 124 a, the inclined surface 124 b, the second flat surface portion 124 c, and the like, and is formed with a size that can be engaged with the second boss 81. ing.

1) In the case of apparatus main body 100Ae-cartridge 70Ae The case where the cartridge 70Ae suitable for the apparatus main body 100Ae is inserted will be described. That is, when the cartridge 70Ae moves from the near side to the far side of the opening 101 of the apparatus main body 100Ae, the first boss 80 and the second boss 81 of the cartridge 70Ae and the first and second insertion guide portions. The relationship with 123 and 124 will be described.

  As shown in FIGS. 21A to 21F, the movable base 110e provided in the cartridge 70Ae is moved by the insertion guide portions 123 and 124 in the same positional relationship as in the first embodiment, so that the cartridge 70Ae is It is inserted into the image forming apparatus 100e.

  Here, in the second embodiment, the movable base 110e is pushed upward and biased by the biasing spring 111. Therefore, the first position X when the movable base 110e is in a free state is a position in which the movable base 110e is pushed upward by the biasing spring 111 and pressed against a predetermined restricting portion. The second position Y is a position where the movable base 110e is pushed down by a predetermined amount against the biasing spring 111.

  Further, the case where the cartridge 70Ae suitable for the apparatus main body 100Ae is taken out is the same as that shown in FIG. 8 of the first embodiment. That is, the relationship between the first boss 80 and the second boss 81 of the cartridge 70Ae and the movable base 110e when the cartridge 70Ae moves from the back side to the front side of the opening 101 of the apparatus main body 100Ae. This is the same as that shown in FIG. The movable table 110e provided on the cartridge 70Ae is moved by the insertion guide portions 123 and 124, whereby the cartridge 70Ae is taken out from the apparatus 100Ae.

  As described above, even in the configuration in which the movable base 110e is provided in the cartridge 70Ae, the cartridge 70e that is compatible with the apparatus main body 100Ae can be attached and detached.

2) In the case of apparatus main body 100Ae-cartridge 70e 'Next, a case where a cartridge 70Ae' (not shown) that is not compatible with the apparatus main body 100Ae is inserted will be described.

  The insertion of a cartridge 70Ae that is not compatible with the image forming apparatus 100Ae '(not shown) is the same as that shown in FIGS. That is, the relationship between the first boss 80 and the second boss 81 of the cartridges 70Ae and 70Ae ′ and the first and second insertion guide portions 123 and 124 is shown in FIGS. 11 and 12 of the first embodiment. It is the same. Accordingly, it is possible to prevent the cartridges 70Ae 'and 70Ae that are not compatible with the apparatus main bodies 100Ae and 100Ae' from being erroneously inserted.

  Further, in the same manner as described in the first embodiment, the second boss 81 provided on the cartridges 70Ae and 70Ae 'has a shape having at least one plane with respect to the cartridge insertion direction. Accordingly, it is possible to more stably prevent the cartridges 70e 'and 70e that are not compatible with the apparatus main bodies 100e and 100e' from being erroneously inserted.

  Similarly to the first embodiment, the longitudinal arrangement of the first boss 80 and the second boss 81 and the engagement position of the insertion guide portion 123 of the movable table 110 can be different. The arrangement of the first boss 80 and the second boss 81 of the cartridge 70 </ b> Ae in the short direction is reversed upside down, and the shapes of the first guide portion 123 and the second guide portion 124 provided on the movable base 110 are up and down. By reversing, several configurations with similar effects can be created.

(Summary)
To summarize the configuration of the second embodiment, the configuration of the image forming apparatus 100 is as follows.

1) An image forming apparatus 100 that forms an image on a recording medium S. A movable base 110e, which is provided with a first boss 80 and a second boss 81 and is movable between a first position X in a free state and a second position different from the first position, is provided. And a cartridge 70Ae that can be attached to and detached from the image forming apparatus main body 100Ae . Also, having the first respective bosses 80 and the second boss 81 can be engaged first insertion guide portion 123 and the second insertion guide portion 124.

Then, when the front Symbol cartridge 70Ae is inserted into the image forming apparatus main body 100Ae, the first insertion guide portion 123, the first boss 80 and engaged with the movable table 110e said first from position X moves to the second position Y. When prior Symbol carriage 110e is moved to the second position Y, the second insertion guide portion 124 that is engageable with the second boss 81.

When retrieving 2) before Symbol cartridge 70Ae from the image forming apparatus main body 100Ae, the second insertion guide portion 124, the second boss 81 engages the said movable table 110e in the first position X It is moved to the second position Y from. When prior Symbol carriage 110e is moved to the second position Y, the first insertion guide unit 123, that is engageable with the first boss 80.

3) The second boss 81 is provided with a flat surface 81′a extending in the cartridge insertion direction F.

  The configuration of the cartridge 70Ae is as follows.

  1) The cartridge 70Ae is detachable from the image forming apparatus main body 100Ae of the image forming apparatus 100 that forms an image on the recording medium S. The image forming apparatus main body 100Ae has a guide member 102 that guides insertion and removal of the cartridge 70Ae from the image forming apparatus main body 100Ae. Further, it has a first insertion guide portion 123 and a second insertion guide portion 124).

  The cartridge 70Ae has a movable base 110e that can move between a first position X in a free state and a second position that is different from the first position. The movable table 110e is provided with a first boss 80 and a second boss 81 that can be engaged with the first insertion guide portion 123 and the second insertion guide portion 124, respectively.

Then, when the front Symbol cartridge 70Ae is inserted into the image forming apparatus main body 100Ae, the first boss 80, the first insertion guide portion 123 engaged with the movable table 110e said first from position X moves to the second position Y. When prior Symbol carriage 110e is moved to the second position Y, the second boss 81 is engageable with the second insertion guide portion 124.

When retrieving 2) before Symbol cartridge 70Ae from the image forming apparatus main body 100Ae, the second boss 81, the second insertion guide portion 124 engaged with the said movable table 110e in the first position X It is moved to the second position Y from. When prior Symbol carriage 110e is moved to the second position Y, the first boss 80, that is engageable with the first insertion guide portion 123.

3) The second boss 81 is provided with a flat surface 81′a extending in the cartridge insertion direction (F).

  The configuration of the image forming apparatus main body 100Ae is as follows.

  1) The image forming apparatus main body 100Ae of the image forming apparatus 100 that is detachable from the cartridge 70Ae and forms an image on the recording medium S. The cartridge 70Ae is provided with a first boss 80 and a second boss 81, and is movable between a first position X in a free state and a second position different from the first position. A movable table 110e is provided.

  The image forming apparatus main body 100Ae has a guide member 102 that guides insertion and removal of the cartridge 70Ae from the image forming apparatus main body 100Ae. In addition, a first insertion guide portion 123 and a second insertion guide portion 124 that are respectively engageable with the first boss 80 and the second boss 81 are provided.

Then, when the front Symbol cartridge 70Ae is inserted into the image forming apparatus main body 100Ae, the first insertion guide portion 123, the first boss 80 and engaged with the movable table 110e said first from position X moves to the second position Y. When prior Symbol carriage 110e is moved to the second position Y, the second insertion guide portion 124 that is engageable with the second boss 81.

2) When taking out the cartridge 70Ae from the image forming apparatus main body 100Ae , the second insertion guide portion 124 engages with the second boss 81 to move the movable base 110e from the first position X. It is moved to the second position Y. When prior Symbol carriage 110e is moved to the second position Y, the first insertion guide unit 123, that is engageable with the first boss 80.

  The configuration of the cartridge erroneous insertion prevention system is as follows.

  This is an erroneous insertion prevention system for a cartridge 70Ae that can be attached to and detached from the image forming apparatus main body 100Ae of the image forming apparatus 100 that forms an image on a recording medium S.

  The cartridge 70Ae is provided with a first boss 80 and a second boss 81, and is movable between a first position X in a free state and a second position different from the first position. It has a movable base (110e).

  The image forming apparatus main body 100Ae includes a guide member 102 that guides insertion and removal of the cartridge 70Ae from the image forming apparatus main body 100Ae. In addition, a first insertion guide portion 123 and a second insertion guide portion 124 that are respectively engageable with the first boss 80 and the second boss 81 are provided.

When the cartridge 70Ae is inserted into the image forming apparatus main body 100Ae, the first insertion guide portion 123 engages with the first boss 80 to move the movable base 110e to the first position. from X is moved to the second position Y. When prior Symbol carriage 110e is moved to the second position Y, the second insertion guide portion 124 that is engageable with the second boss 81.

Example 3
The third embodiment is another configuration capable of obtaining the same effect as the first and second embodiments. A basic configuration will be described using an apparatus main body 100Ak and a cartridge 70Ak that is compatible with and can be inserted into the apparatus main body 100Ak.

  Since the overall schematic configuration of the apparatus main body 100Ak and the cartridge 70Ak according to the third embodiment is the same as the configuration described in the first embodiment, a description thereof will be omitted.

  The form of the present Example 3 is demonstrated using FIG. 22, FIG. In the third embodiment, the insertion guides 123 and 124 provided in the apparatus main body 100Aa in the first and second embodiments are provided in the cartridge 70Ak, and the first and second bosses 80 and 81 provided in the cartridge 70a are provided in the apparatus. This is a configuration provided in the main body 100Ak.

  As shown in FIG. 22, the cartridge 70Ak is provided with a guide upper part 120, a guide middle part 121, and a guide lower part 122. The first insertion guide portion 123 is formed by a guide upper portion 120 and a guide middle portion 121. The second insertion guide part 124 is formed by a guide middle part 121 and a guide lower part 122.

  The first insertion guide portion 123 has a labyrinth shape including the inclined surface 123a, the first flat surface portion 123b, the concave flat surface portion 123c, and the like, and is formed with a size that can be engaged with the first boss 80. ing.

  The second insertion guide portion 124 has a labyrinth shape including the first flat surface portion 124 a, the inclined surface 124 b, the second flat surface portion 124 c, and the like, and is formed with a size that can be engaged with the second boss 81. ing.

  As shown in FIG. 23, the device 100Ak is provided with a movable base 110k that is movably provided and a biasing spring 111 that biases the movable base 110k to a predetermined position. The movable table 110k engages with the first and second insertion guide portions 123 and 124 provided on the cartridge 70Ae when the cartridge is inserted. The movable base 110k is provided with a first boss 80 on the upstream side in the cartridge insertion direction F and a second boss 81 on the downstream side in the cartridge insertion direction F with respect to the first boss 80. .

1) In the case of apparatus main body 100Ak-cartridge 70Ak A case where a cartridge 70Ak that is compatible with the apparatus main body 100Ak is inserted will be described.

  The relationship between the first and second insertion guide portions 123 and 124 of the cartridge 70Ak, the first boss 80, and the second boss 81 is the same as that shown in FIGS. is there. Even in the configuration in which the insertion guide portions 123 and 124 are provided in the cartridge 70Ak and the first and second bosses 80 and 81 are provided in the apparatus main body 100Ak, the cartridge 70Ak suitable for the apparatus main body 100Ak can be attached and detached.

  Here, in the third embodiment, the movable base 110k is pushed upward and biased by the biasing spring 111. Accordingly, the first position X of the movable base 110k in the free state is a position in which the movable base 110k is pushed upward by the biasing spring 111 and pressed against a predetermined restricting portion. The second position Y is a position where the movable base 110k is pushed down to a predetermined amount against the biasing spring 111.

2) In the case of the apparatus main body 100Ak-cartridge 70k ′ and the apparatus main body 100Ak′-cartridge 70k When a cartridge 70Ak ′ (not shown) that is not compatible with the apparatus main body 100Ak is inserted, and in the apparatus 100Ak ′ (not shown) When a cartridge 70Ak that is not compatible with the cartridge 70Ak is inserted, the cartridge 70Ak is the same as that shown in FIGS.

  In any case, the relationship between the first and second insertion guide portions 123 and 124 of the cartridge, the first boss 80, and the second boss 81 is shown in FIGS. 9 and 12 of the first embodiment. It is the same. Therefore, it is possible to prevent the incompatible cartridges 70Ak 'and 70Ak from being erroneously inserted into the apparatus main bodies 100Ak and 100Ak'.

  Further, similarly to the first embodiment, the second boss 81 provided on the apparatus main body 100Ak is shaped to have at least one plane with respect to the cartridge insertion direction. Accordingly, it is possible to more stably prevent the incompatible cartridges 70Ak 'and 70Ak from being erroneously inserted.

  Similarly to the first embodiment, the longitudinal arrangement of the first boss 80 and the second boss 81 and the engagement position of the insertion guide portion 123 of the movable table 110 can be different. The shapes of the first insertion guide portion 123 and the second insertion guide portion 124 of the cartridge 70Ak are turned upside down. In addition, the arrangement of the first boss 80 and the second boss 81 provided on the movable base 110 in the lateral direction is turned upside down. Thereby, several kinds of configurations having the same effect can be created.

  Further, the structure in which the insertion guide portions 123 and 124 are provided in the cartridge 70Ak and the first and second bosses 80 and 81 are provided in the apparatus main body 100Ak is as follows. That is, as shown in the second embodiment, the same effect can be obtained even when the movable table 110 provided in the apparatus 100 is provided in the cartridge 70.

(Summary)
To summarize the configuration of the third embodiment, the configuration of the image forming apparatus 100 is as follows.

  1) An image forming apparatus 100 that forms an image on a recording medium S. It has a first insertion guide portion 123 and a second insertion guide portion 124, and has a cartridge 70Ak that can be attached to and detached from the image forming apparatus main body 100Aa.

Also, having a first position X and the first position the movable carriage 110k and a second position Y position is different from the X at free state. The movable table 110k includes a first boss 80 and a second boss 81 that can be engaged with the first insertion guide portion 123 and the second insertion guide portion 124, respectively.

Then, when the front Symbol cartridge 70Ak is inserted into the image forming apparatus main body 100Ak, the first insertion guide portion 123, the first boss 80 and engaged with the movable table 110k first from position X moves to the second position Y. When prior Symbol carriage 110a is moved to the second position Y, the second insertion guide portion 124 that is engageable with the second boss 81.

  2) The image forming apparatus 100 forms an image on the recording medium S. The image forming apparatus main body 100Ak has a detachable cartridge 70Ak. The cartridge 70Ak is provided with a first insertion guide portion 123 and a second insertion guide portion 124, and the first position X in the free state and the second position different from the first position are provided. The movable table 110k is movable.

  The image forming apparatus main body (having a guide member 102 for guiding insertion and removal of the cartridge 70Ak with respect to the 100Ak. The first insertion guide portion 123 and the second insertion guide portion 124 are respectively engageable with the first insertion guide portion 124 and the second insertion guide portion 124. It has a boss 80 and a second boss 81.

Then, when the cartridge 70Ak is inserted into the image forming apparatus main body 100Ak, the first insertion guide portion 123 engages with the first boss 80 to move the movable table 110k to the first position. from X is moved to the second position Y. When prior Symbol carriage 110k is moved to the second position Y, the second insertion guide portion 124 that is engageable with the second boss 81.

3) The second boss 81 has a flat surface 81′a extending in the cartridge insertion direction F.

  The configuration of the cartridge 70Ak is as follows.

1) is a removable cartridge 70Ak image to the image forming apparatus main body 100Aa of the image forming apparatus 100 for forming a on the recording medium S. Also, having a first position X and the first position the movable carriage 110k and a second position Y position is different from the X at free state. Moreover, it has the 1st boss | hub 80 and the 2nd boss | hub 81 which were provided in the said movable stand 110k.

The cartridge 70Ak has a first insertion guide portion 123 and a second insertion guide portion 124 that can be engaged with the first boss 80 and the second boss 81, respectively. Then, when the front Symbol cartridge 70Ak is inserted into the image forming apparatus main body 100Ak, the first insertion guide portion 123, the first boss 80 and engaged with the movable table 110k first from position X moves to the second position Y. When prior Symbol carriage 110a is moved to the second position Y, the second insertion guide portion 124 that is engageable with the second boss 81.

  2) The cartridge 70Ak is detachable from the image forming apparatus main body 100Ak of the image forming apparatus 100 that forms an image on the recording medium S. The image forming apparatus main body 100Ak includes a guide member 102 that guides insertion and removal of the cartridge 70Ak from the image forming apparatus main body 100Ak. In addition, the first boss 80 and the second boss 81 are provided.

  The cartridge 70Ak has a movable base 110k that can move between a first position X in a free state and a second position Y that is different from the first position. The movable base 110k is provided with a first insertion guide portion 123 and a second insertion guide portion 124 that can be engaged with the first boss 80 and the second boss 81, respectively.

Then, when the front Symbol cartridge 70Ak is inserted into the image forming apparatus main body 100Ak, the first insertion guide portion 123, the first boss 80 and engaged with the movable table 110k first from position X moves to the second position Y. When prior Symbol carriage 110k is moved to the second position Y, the second insertion guide portion 124 that is engageable with the second boss 81.

  The configuration of the image forming apparatus main body 100Ak is as follows.

  1) The image forming apparatus main body 100Aa of the image forming apparatus 100 that forms an image on the recording medium S, to which a cartridge 70Ak having a first insertion guide part 123 and a second insertion guide part 124 is detachable.

  A guide member 102 is provided for guiding insertion and removal of the cartridge 70Aa from the image forming apparatus main body 100Aa. Moreover, it has the movable stand 110k which can move between the 1st position X in the free state, and the 2nd position Y from which the said 1st position X differs. The movable table 110k includes a first boss 80 and a second boss 81 that can be engaged with the first insertion guide portion 123 and the second insertion guide portion 124, respectively.

When the cartridge 70Ak is inserted into the image forming apparatus main body 100Ak, the first boss 80 engages with the first insertion guide portion 123 to engage the movable base. 110k is moved from the first position X to the second position Y. When the carriage 110a is moved to the second position Y, the second boss 81 that is engageable with the second insertion guide portion 124.

  2) The image forming apparatus main body 100Ak of the image forming apparatus 100 in which the cartridge 70Ak is detachable and forms an image on the recording medium S. The cartridge 70Ak is provided with a first insertion guide portion 123 and a second insertion guide portion 124, and a first position X in a free state and a second position Y that is different from the first position. It has a movable table 110k that can move between them.

  A guide member 102 is provided for guiding insertion and removal of the cartridge 70Ak from the image forming apparatus main body 100Ak. Moreover, it has the 1st boss | hub 80 and the 2nd boss | hub 81 which can be engaged with the said 1st insertion guide part 123 and the 2nd insertion guide part 124, respectively.

Then, when the front Symbol cartridge 70Ak is inserted into the image forming apparatus main 100Ak the first boss 80, the first insertion guide portion 123 engaged with the movable table 110k first from position X moves to the second position Y. When prior Symbol carriage 110k is moved to the second position Y, the second boss 81 that is engageable with the second insertion guide portion 124.

3) The second boss 81 has a flat surface 81′a extending in the cartridge insertion direction F.

  The configuration of the erroneous insertion prevention system for the cartridge 7 is as follows.

  1) A system for preventing erroneous insertion of a cartridge 70Ak that can be attached to and detached from an image forming apparatus main body 100Ak of an image forming apparatus 100 that forms an image on a recording medium S. The cartridge 70Ak has a first insertion guide portion 123 and a second insertion guide portion 124.

  The image forming apparatus main body 100Ak includes a guide member 102 that guides insertion and removal of the cartridge 70Aa from the image forming apparatus main body 100Aa. Moreover, it has the movable stand 110k which can move between the 1st position X in the free state, and the 2nd position Y from which the said 1st position X differs. The movable table 110k includes a first boss 80 and a second boss 81 that can be engaged with the first insertion guide portion 123 and the second insertion guide portion 124, respectively.

Then, when the front Symbol cartridge 70Ak is inserted into the image forming apparatus main body 100Ak, the first insertion guide portion 123, the first boss 80 and engaged with the movable table 110k first from position X moves to the second position Y. When prior Symbol carriage 110a is moved to the second position Y, the second insertion guide portion 124 that is engageable with the second boss 81.

  2) A system for preventing erroneous insertion of the cartridge 70Ak that can be attached to and detached from the image forming apparatus main body 100Ak of the image forming apparatus 100 that forms an image on the recording medium S. The cartridge 70Ak is provided with a first insertion guide portion 123 and a second insertion guide portion 124, and a first position X in a free state and a second position Y that is different from the first position. It has a movable table 110k that can move between them.

  The image forming apparatus main body 100Ak includes a guide member 102 that guides insertion and removal of the cartridge 70Ak from the image forming apparatus main body 100Ak. Moreover, it has the 1st boss | hub 80 and the 2nd boss | hub 81 which can be engaged with the said 1st insertion guide part 123 and the 2nd insertion guide part 124, respectively.

Then, when the front Symbol cartridge 70Ak is inserted into the image forming apparatus main body 100Ak, the first insertion guide portion 123, the first boss 80 and engaged with the movable table 110k first from position X moves to the second position Y. When prior Symbol carriage 110k is moved to the second position Y, the second insertion guide portion 124 that is engageable with the second boss 81.

《Other matters》
1) The functions, materials, shapes, and relative arrangements of the components described in the embodiments are not intended to limit the scope of the present invention only to those unless otherwise specified.

  2) In the present invention, the image forming apparatus is not limited to the electrophotographic image forming apparatus of the embodiment. The image forming apparatus includes an image forming apparatus that forms an image on a recording medium using various other known image forming principles and methods such as an electrostatic recording process and a magnetic recording process.

  3) The image forming apparatus is not limited to one cartridge that can be attached and detached. Also included is an image forming apparatus that forms a color image or the like by detachably mounting a plurality of cartridges having different colors or the like on respective predetermined mounting portions.

  4) The cartridge is not limited to the integrated process cartridge of the embodiment. A separation type process cartridge having an image forming process means acting on an image carrier on which an image is formed, and a developing means for developing a latent image formed on the image carrier on which an image is formed with a developer. Development cartridges are included. In addition, a unit that is detachably mounted on the image forming apparatus main body and contributes to an image forming process for forming an image on a recording medium is included.

  100... Image forming apparatus, 100 A... Image forming apparatus main body, 70... Cartridge, S... Recording medium, 80.・ First insertion guide portion, 124 ・ ・ Second insertion guide, X ・ ・ First position, Y ・ ・ Second position

Claims (28)

An image forming apparatus for forming an image on a recording medium,
A cartridge having a first boss and a second boss, and detachable from the main body of the image forming apparatus;
A movable base movable between a first second position in which positions are different from positions between said first position when freely state,
A first insertion guide portion and a second insertion guide portion which are provided on the movable base and are respectively engageable with the first boss and the second boss;
Have
When prior Symbol cartridge is inserted into the image forming apparatus main body, the first boss penetrates into the first insertion guide portion, wherein the movable platform engaging from the first position the is moved to a second position, when the front Symbol carriage is moved to the second position, the second boss is characterized that you have been engageable with the second insertion guide portion Image forming apparatus. Moves in front Symbol cartridge during removal from the image forming apparatus main body, said second boss, the movable base engages with the second insertion guide portion to the second position from the first position is, when the front Symbol carriage is moved to the second position, the first boss, according to claim 1, characterized that you have been engageable with the first insertion guide portion Image forming apparatus. The image forming apparatus according to claim 1 , wherein the second boss is provided with a flat surface extending in the cartridge insertion direction. An image forming apparatus for forming an image on a recording medium,
A movable table provided with a first boss and a second boss, which is movable between a first position in a free state and a second position different from the first position; A cartridge detachable from the forming apparatus body;
Before Symbol first insertion guide portion and the second insertion guide portion capable respectively engage the first boss and the second boss,
Have
When prior Symbol cartridge is inserted into the image forming apparatus main body, the first boss penetrates into the first insertion guide portion, wherein the movable platform engaging from the first position the is moved to a second position, when the front Symbol carriage is moved to the second position, the second boss is characterized that you have been engageable with the second insertion guide portion Image forming apparatus. Moves in front Symbol cartridge during removal from the image forming apparatus main body, said second boss, the movable base engages with the second insertion guide portion to the second position from the first position It is, when the front Symbol carriage is moved to the second position, before Symbol first boss in claim 4, characterized that you have been engageable with the first insertion guide portion The image forming apparatus described. The image forming apparatus according to claim 4 , wherein the second boss is provided with a flat surface extending in the cartridge insertion direction. An image forming apparatus for forming an image on a recording medium,
A cartridge having a first insertion guide portion and a second insertion guide portion and detachable from the main body of the image forming apparatus;
A movable base movable between a first second position in which positions are different from positions between said first position when freely state,
A first boss and a second boss which are provided on the movable base and are respectively engageable with the first insertion guide portion and the second insertion guide portion;
Have
The first insertion guide portion engages with the first boss when the cartridge is inserted into the image forming apparatus main body, and moves the movable base from the first position to the second position. The image forming apparatus, wherein the second insertion guide portion can be engaged with the second boss only when the movable base is moved to the second position. An image forming apparatus for forming an image on a recording medium,
A movable base provided with a first insertion guide portion and a second insertion guide portion and movable between a first position in a free state and a second position different from the first position. A cartridge that can be attached to and detached from the image forming apparatus main body;
Before Symbol first insertion guide portion and the first boss and the second boss can be respectively engaged with the second insertion guide portion,
Have
When prior Symbol cartridge is inserted into the image forming apparatus main body, the first boss penetrates into the first insertion guide portion, wherein the movable platform engaging from the first position the is moved to a second position, when the front Symbol carriage is moved to the second position, the second boss is characterized that you have been engageable with the second insertion guide portion Image forming apparatus. The image forming apparatus according to claim 7 , wherein the second boss has a flat surface extending in a cartridge insertion direction. First the position and the first position and the second position in which positions are different from the movable table movable between at freedom state, the first insertion guide portion provided on the movable table first A cartridge that can be attached to and detached from an image forming apparatus main body of an image forming apparatus that forms an image on a recording medium.
Having said first insertion guide portion and the first boss and the second boss can be respectively engaged with the second insertion guide portion, when the front Symbol cartridge is inserted into the image forming apparatus main body, wherein the first boss, said first entered the insertion guide portion, engaged by moving the movable table in the second position from the first position, prior Symbol position the movable platform is of the second cartridge upon movement, said second boss, characterized that you have been engageable with the second insertion guide portion. Moves in front Symbol cartridge during removal from the image forming apparatus main body, said second boss, the movable base engages with the second insertion guide portion to the second position from the first position when is, the previous SL carriage has moved to the second position, the first boss cartridge according to claim 11, wherein the first is the insertion guide portion and engageable . The cartridge according to claim 10 or 11, wherein the second boss is provided with a flat surface extending in the cartridge insertion direction. An image forming apparatus for forming an image on a record medium, a first insertion guide portion and the second insertion guide portion, a removable cartridge in an image forming apparatus having,
A first boss and a second boss that are respectively engageable with the first insertion guide portion and the second insertion guide portion are provided, and the first position and the first position in a free state are position has a carriage movable between a different second position, when the front Symbol cartridge is inserted into the image forming apparatus main body, said first boss, said first insertion guide portion when penetrated, engaged by moving the movable table in the second position from the first position, prior Symbol movable base is moved to said second position, said second boss, It said second insertion guide portion and the cartridge, characterized that you have been engageable. Moves in front Symbol cartridge during removal from the image forming apparatus main body, said second boss, the movable base engages with the second insertion guide portion to the second position from the first position It is, when the front Symbol carriage is moved to the second position, the first boss, according to claim 13, wherein that you have been engageable with the first insertion guide portion Cartridge. The cartridge according to claim 13 or 14, wherein the second boss is provided with a flat surface extending in the cartridge insertion direction. Of an image forming apparatus for forming an image on a record medium, a carriage movable between a first position and a position different second position from the first position when the free state, the movable table A cartridge detachably attached to an image forming apparatus main body having a first boss and a second boss provided in
When said first boss and having a first insertion guide portion and the second insertion guide portion capable respectively engage the second boss, before Symbol cartridge is inserted into the image forming apparatus main body, moving the first insertion guide portion engages with the first boss is moved to the second position the movable table from the first position, prior Symbol movable table is the second position In this case, the cartridge is characterized in that the second insertion guide portion can be engaged with the second boss. Of an image forming apparatus for forming an image on a record medium, a first boss and a second boss, a detachable cartridge in the image forming apparatus main body having,
A first insertion guide portion and a second insertion guide portion that are respectively engageable with the first boss and the second boss are provided, and the first position and the first position in a free state are position has a carriage movable between a different second position, when the front Symbol cartridge is inserted into the image forming apparatus main body, the first insertion guide portion, the first boss engaged by moving the movable table in the second position from said first position, when the front Symbol carriage is moved to the second position, the second insertion guide portion, said a cartridge characterized that you have been engageable with the second boss. An image forming apparatus main body of an image forming apparatus in which a cartridge having a first boss and a second boss is detachable and forms an image on a recording medium,
A movable base movable between a first second position in which positions are different from positions between said first position when freely state,
A first insertion guide portion and a second insertion guide portion which are provided on the movable base and are respectively engageable with the first boss and the second boss;
Have
When prior Symbol cartridge is inserted into the image forming apparatus main body, the first insertion guide portion, the position of the second said carriage from said first position engaged with said first boss It is moved, when the prior SL carriage is moved to the second position, the second insertion guide portion, an image forming apparatus which is characterized that you have been engageable with the second boss Body. Moves in front Symbol cartridge during removal from the image forming apparatus main body, the second insertion guide portion is in said second position said movable table from the first position engaged with the second boss is, when the front Symbol carriage is moved to the second position, the first insertion guide portion, according to claim 18, characterized that you have been engageable with said first boss The image forming apparatus main body. A cartridge having a movable base that is provided with a first boss and a second boss and is movable between a first position in a free state and a second position different from the first position is attached and detached. An image forming apparatus main body of an image forming apparatus capable of forming an image on a recording medium,
Before Symbol first insertion guide portion and the second insertion guide portion capable respectively engage the first boss and the second boss,
Have
When prior Symbol cartridge is inserted into the image forming apparatus main body, the first insertion guide portion, the position of the second said carriage from said first position engaged with said first boss It is moved, when the prior SL carriage is moved to the second position, the second insertion guide portion, an image forming apparatus which is characterized that you have been engageable with the second boss Body. Moves in front Symbol cartridge during removal from the image forming apparatus main body, the second insertion guide portion is in said second position said movable table from the first position engaged with the second boss is, when the front Symbol carriage is moved to the second position, the first insertion guide portion, according to claim 20, characterized that you have been engageable with said first boss The image forming apparatus main body. An image forming apparatus main body of an image forming apparatus in which a cartridge having a first insertion guide part and a second insertion guide part is detachable and forms an image on a recording medium,
A guide member for guiding insertion and removal of the cartridge from the image forming apparatus main body;
A movable table movable between a first position in a free state and a second position different from the first position;
A first boss and a second boss, which are provided on the movable base and are engageable with the first insertion guide portion and the second insertion guide portion, respectively;
Have
When prior Symbol cartridge is inserted into the image forming apparatus main body, the first boss penetrates into the first insertion guide portion, wherein the movable platform engaging from the first position the is moved to a second position, when the front Symbol carriage is moved to the second position, the second boss is characterized that you have been engageable with the second insertion guide portion Image forming apparatus main body. A movable base provided with a first insertion guide portion and a second insertion guide portion and movable between a first position in a free state and a second position different from the first position. An image forming apparatus main body of an image forming apparatus that has a removable cartridge and forms an image on a recording medium,
Before Symbol first insertion guide portion and the first boss and the second boss can be respectively engaged with the second insertion guide portion,
Have
When prior Symbol cartridge is inserted into the image forming apparatus main body, the first boss penetrates into the first insertion guide portion, wherein the movable platform engaging from the first position the is moved to a second position, when the front Symbol carriage is moved to the second position, the second boss is characterized in that it is engageable with the second insertion guide portion Image forming apparatus main body. 24. The image forming apparatus main body according to claim 22 , wherein the second boss has a flat surface extending in the cartridge insertion direction. A system for preventing erroneous insertion of a cartridge that can be attached to and detached from an image forming apparatus main body of an image forming apparatus that forms an image on a recording medium,
The cartridge has a first boss and a second boss;
A movable base movable between a first second position in which positions are different from positions between said first position when freely state, is provided on said movable table, said first boss A first insertion guide portion and a second insertion guide portion that are respectively engageable with the second boss,
When prior Symbol cartridge is inserted into the image forming apparatus main body, the first insertion guide portion, the position of the second said carriage from said first position engaged with said first boss is moved, when the prior SL carriage is moved to the second position, the second insertion guide portion, erroneous insertion preventing characterized that you have been engageable with the second boss system. A system for preventing erroneous insertion of a cartridge that can be attached to and detached from an image forming apparatus main body of an image forming apparatus that forms an image on a recording medium,
The cartridge is provided with a first boss and a second boss, and has a movable base that can move between a first position in a free state and a second position different from the first position. And
The image forming apparatus main body, the front SL has a first insertion guide portion and the second insertion guide portion capable respectively engage the first boss and the second boss, a,
When prior Symbol cartridge is inserted into the image forming apparatus main body, the first insertion guide portion, the position of the second said carriage from said first position engaged with said first boss When the movable base is moved to the second position, the second insertion guide portion can be engaged with the second boss when the movable base is moved to the second position. . A system for preventing erroneous insertion of a cartridge that can be attached to and detached from an image forming apparatus main body of an image forming apparatus that forms an image on a recording medium,
The cartridge has a first insertion guide portion and a second insertion guide portion,
The image forming apparatus main body, a movable table movable between a first second position in which positions are different from positions between said first position when freely state, is provided on the carriage And a first boss and a second boss that are respectively engageable with the first insertion guide portion and the second insertion guide portion,
When prior Symbol cartridge is inserted into the image forming apparatus main body, the first insertion guide portion, the position of the second said carriage from said first position engaged with said first boss is moved, when the prior SL carriage is moved to the second position, the second insertion guide portion, erroneous insertion preventing characterized that you have been engageable with the second boss system. A system for preventing erroneous insertion of a cartridge that can be attached to and detached from an image forming apparatus main body of an image forming apparatus that forms an image on a recording medium,
The cartridge is provided with a first insertion guide portion and a second insertion guide portion, and is movable between a first position in a free state and a second position different from the first position. Has a movable base,
The image forming apparatus main body, the front SL has a first insertion guide portion and the second insertion guide portion engageable respectively a first boss and a second boss, and
When prior Symbol cartridge is inserted into the image forming apparatus main body, the first insertion guide portion, the position of the second said carriage from said first position engaged with said first boss is moved, when the prior SL carriage is moved to the second position, the second insertion guide portion, erroneous insertion preventing, characterized in that it is engageable with the second boss system.