Image forming apparatus

Abstract

An image forming apparatus is disclosed. The image forming apparatus includes an apparatus main body and a movable unit. The apparatus main body includes an image forming device and a restriction portion. The movable unit includes an image reading device and is detachably attached to the apparatus main body. The movable unit is opened and closed with respect to the apparatus main body by rotating about a rotation axis when the movable unit is attached to the apparatus main body. The movable unit is attached to and detached from the apparatus main body by moving in an axial direction of the rotation axis. The movable unit further includes a restricted portion that is engaged with the restriction portion, the restriction portion restricting movement of the movable unit in the axial direction. The restriction portion or the restricted portion further includes a deformation portion having elasticity. The deformation portion is deformed to attach and detach the movable unit to and from the apparatus main body.

Description

Technical Field

[0001] This disclosure relates to image forming apparatus, such as copiers, printers and fax machines, and more particularly to image forming apparatus such as multifunctional peripheral devices, which include image reading devices arranged above the image forming apparatus. Background Technology

[0002] Typically, there are image forming apparatuses such as multifunctional peripheral devices, which include a device body containing an image forming apparatus and a unit containing an image reading device arranged above the device body (e.g., Japanese Patent Application Publication No. 2017-167530). In such multifunctional peripheral devices, the device body includes an attachment portion on the rear side of the upper part of the device body containing a rotation axis, and the unit can be attached to or detached from the device body along the axial direction of the rotation axis (hereinafter referred to as the axial direction). The unit can be opened and closed relative to the device body about the rotation axis. The device body also includes a limiting portion that restricts the movement of the unit along the axial direction of the rotation axis.

[0003] As described in Japanese Patent Application Publication No. 2017-167530, there exists a multifunctional peripheral device designed to include a unit attached to a device body. When the unit is attached to the device body, it is typically positioned in a first position for image formation and in a second position for operations such as paper jam clearing. The unit is closed relative to the device body in the first position and open relative to the device body in the second position. In each of these states, a limiting portion restricts the movement of the unit along the axial direction of the rotation axis. For cleaning the interior of the unit or performing maintenance work such as unit repair, if the unit needs to be removed from the device body, the unit is positioned in a third position, where it is opened wider than in the second position. In the third position, the limiting portion of the device body and the limited portion of the unit disengage, and the limiting portion of the device body no longer restricts the movement of the unit along the axial direction of the rotation axis. In other words, the movement restriction or positioning of the unit is released. In this state, the unit can be detached from the device body.

[0004] However, in the above configuration, the unit needs to be opened particularly large relative to the device body for disassembly. Therefore, during the unit opening process, where the device body and the unit interfere with each other, considering the reduction in the size of the image forming device, it is necessary to increase the width W of the cutout in the device body so that the rear of the multi-functional peripheral device (i.e., the rear end side of the device body and the unit) is flat. Figure 13C ).

[0005] This increase in the width W of the cutout in the device body ( Figure 13BThis will result in the attachment portion of the device body having less strength than the cut portion. Figure 13A The strength is low. Summary of the Invention

[0006] According to one aspect of this disclosure, an image forming apparatus is provided, comprising: an apparatus body including an image forming device and a limiting portion, and a movable unit including an image reading device and detachably attached to the apparatus body, wherein the movable unit is configured to open and close relative to the apparatus body by rotating about a rotation axis when the movable unit is attached to the apparatus body, and is configured to be attached to and detached from the apparatus body by axial movement along the rotation axis, wherein the movable unit includes a limiting portion configured to engage with the limiting portion and the limiting portion is configured to limit movement of the movable unit along the axial direction, wherein the limiting portion or the limiting portion includes a resilient deformable portion, and wherein the deformable portion is configured to deform to allow the movable unit to be attached to and detached from the apparatus body.

[0007] Other features of this disclosure will become apparent from the following description of exemplary embodiments with reference to the accompanying drawings. Attached Figure Description

[0008] Figure 1 This is a perspective view illustrating a multifunctional peripheral device according to a first exemplary embodiment of the present disclosure.

[0009] Figure 2 This is a cross-sectional view illustrating a multifunctional peripheral device according to a first exemplary embodiment of the present disclosure.

[0010] Figure 3 This is a perspective view illustrating the upper surface of the device body according to a first exemplary embodiment of the present disclosure.

[0011] Figure 4 This is a perspective view illustrating the lower surface of a scanning unit according to a first exemplary embodiment of the present disclosure.

[0012] Figure 5 This is a perspective view illustrating the configuration of the attachment portion according to a first exemplary embodiment of the present disclosure.

[0013] Figure 6A , Figure 6B and Figure 6C These are perspective views illustrating the scanning unit attached to the device body according to a first exemplary embodiment of the present disclosure.

[0014] Figure 7 This is a cross-sectional view illustrating the area around the auxiliary section when the scanning unit is turned off.

[0015] Figure 8 This is an example of a cross-sectional view around the attachment when the scanning unit is open.

[0016] Figure 9 This is a perspective view illustrating a multifunctional peripheral device according to a second exemplary embodiment of the present disclosure.

[0017] Figure 10 This is a perspective view illustrating an attachment portion according to a second exemplary embodiment of the present disclosure.

[0018] Figure 11 This is a cross-sectional view illustrating a second exemplary embodiment of the present disclosure in which the scanning unit and the device body are attached.

[0019] Figure 12 This is a perspective view illustrating the area around the attachment portion according to a second exemplary embodiment of the present disclosure.

[0020] Figure 13A , Figure 13B and Figure 13C These are schematic diagrams illustrating the problem by showing the multifunctional peripheral device viewed from the side. Detailed Implementation

[0021] A first exemplary embodiment of this disclosure will now be described. In this document, a laser printer will be described as an example of an image forming apparatus.

[0022] (Overall configuration of the image forming equipment)

[0023] First, an image forming apparatus according to a first exemplary embodiment of the present disclosure will be described. Figure 1 and 2 These are schematic diagrams illustrating an image forming apparatus 1 (hereinafter referred to as a multi-functional peripheral device 1), in which a scanning unit 3 (as a unit configured to be movable and including an image reading device) can be attached to and detached from the upper part of the device body 2 including the image forming apparatus. Figure 1 The example illustrates the state in which the scanning unit 3 is open relative to the device body 2. Figure 2 This is a cross-sectional view of the internal structure of the device body 2.

[0024] like Figure 1 As shown, the multi-functional peripheral device 1 generally includes a device body 2 containing an image forming apparatus and a scanning unit 3 containing an image reading apparatus. The scanning unit 3 is arranged above the device body 2.

[0025] In this document, for the purpose of describing this exemplary embodiment, the direction relative to the sheet feed box 105 of the scanning unit 3, viewed from the vertical direction, is referred to as the bottom or lower side, and the direction opposite to the direction of the sheet feed box 105 is referred to as the upper side. Furthermore, Figure 2 The front direction of the drawing plane and Figure 2 The rear direction of the drawing surface is referred to as the left and right sides of the multi-functional peripheral device, respectively. In addition, regarding the direction orthogonal to the vertical direction and the left and right directions, the direction from the laser unit 103 toward the photosensitive drum 102 described below is referred to as the rear side or back side, and the direction opposite to the direction from the laser unit 103 toward the photosensitive drum 102 is referred to as the front side or front side.

[0026] like Figure 1 As shown, the scanning unit 3 is rotatably attached to the device body 2 about the rear rotation axis A. The device body 2 and the scanning unit 3 are coupled and supported by the switch limiting part 10 in front of the rotation axis A.

[0027] The internal structure of the device body 2 will be described below. For example... Figure 2 As shown, the device body 2 includes a processing box 101 and a laser printer that forms images by electrophotography and records the images on a sheet of recording material.

[0028] The sheets stored in the sheet feed cassette 105 are separated and fed one by one by the sheet feed roller 106 and the sheet separation unit 107 based on the printing signals from the source computer (not shown). The separated sheets are then conveyed to the photosensitive drum 102 and the transfer unit, which includes the transfer roller 109 that is pressed against the photosensitive drum 102.

[0029] In the processing cartridge 101, a photosensitive drum 102, serving as an image-carrying component, is rotatably arranged inside the housing. A laser beam, based on image information, is emitted onto the charged photosensitive drum 102, and a toner is used to develop the latent image formed by the laser beam irradiating the photosensitive drum 102. Then, in the pressure contact between the photosensitive drum 102 and the transfer roller 109, the toner image is transferred onto the sheet. Furthermore, a laser unit 103 is arranged to irradiate the photosensitive drum 102 with a laser beam.

[0030] The sheet with the toner image transferred is fed to a fixing unit including a fixing film 110 and a pressure roller 111 that presses against the fixing film 110, and the toner image is fixed.

[0031] The sheet with the toner image fixed is conveyed by the discharge roller pair 112 and then discharged to the discharge sheet stacking unit 113 above the equipment body 2.

[0032] The scanning unit 3 includes a common flatbed scanner (for example, as described in Japanese Patent Application Publication No. 2000-92275). Since the internal structure of the scanning unit 3 is similar to that of a common flatbed scanner, its description will be omitted.

[0033] (Configuration of printer and scanner positioning)

[0034] Reference Figures 3 to 5 Describe the positioning configuration of the device body 2 and the scanning unit 3. Figure 3 This is a perspective view of the upper part of the device body 2. Figure 4 This is a perspective view illustrating the lower part of scanning unit 3. Figure 5 This is a perspective view showing the area around the attachment portion 5 when the device body 2 and the scanning unit 3 are attached.

[0035] like Figure 3 As shown, the discharge sheet stacking unit 113, which is part of the housing of the device body 2, is arranged on the upper surface of the cover member 6. The cover member 6 is arranged on the frame 7 of the device body 2 and can be opened and closed relative to the device body 2 about the rotation axis B.

[0036] The device body 2 has two positions where each attachment part 5 is arranged, each attachment part 5 including Figure 5 The rotating shaft 51 shown is rotatably supported by the scanning unit 3 about the rotation axis A. In the direction of the axis of the rotating shaft 51 (hereinafter referred to as the axial direction), the attachment portion 5 is arranged on each of the two end sides of the upper part of the device body 2 at the rear side of the device body 2.

[0037] Furthermore, the device body 2 includes a first limiting part 21 and a second limiting part 22, which serve as limiting parts 20 for restricting the movement of the scanning unit 3 in the axial direction. The second limiting part 22 includes a resilient deformable part 26. The deformable part 26 is deformable in the opening-closing direction of the scanning unit 3. A detailed description of this will be provided below. The deformable part 26 is made of, for example, resin material and is integrally formed with the other parts of the limiting part 20. The second limiting part 22 also includes an inclined surface 23, which is an inclined surface in the axial direction. The first limiting part 21 and the second limiting part 22, as limiting parts 20, are located between the attachment part 5 relative to the axial direction. The limiting part 20 and the attachment part 5 are arranged in the axial direction.

[0038] Furthermore, the device body 2 includes an auxiliary part 25, which assists in restricting the movement of the scanning unit 3 in the axial direction when the scanning unit 3 is closed relative to the device body 2. Similar to the attachment part 5, the auxiliary part 25 is arranged on the rear side of the upper part of the device body 2.

[0039] An opening-closing limiting part 10 is arranged on the upper right side of the device body 2 and engages with a guide rail part 39, which will be described below, to limit the opening angle of the scanning unit 3 relative to the device body 2. Therefore, as... Figure 1 As shown, the scanning unit 3 and the top cover member 6 are opened relative to the device body 2 to expose the interior of the device body 2. This allows access to the processing box 101 and enables operations such as paper jam clearing.

[0040] like Figure 4 As shown, at the lower part of the scanning unit 3, a bearing hole 40 is provided at a position corresponding to the rotation axis 51 of the device body 2 when the scanning unit 3 is attached to the device body 2. Furthermore, a restraining part 33 is arranged. The aforementioned restraining part 20 restricts the movement of the restraining part 33 in the axial direction.

[0041] Furthermore, the scanning unit 3 includes an auxiliary part 34, which assists in restricting the movement of the scanning unit 3 in the axial direction when the scanning unit 3 is attached to the device body 2 and closed relative to the device body 2.

[0042] In addition, a guide rail section 39 is formed.

[0043] (How to attach a scanner to a printer)

[0044] Reference Figures 5 to 9 The method of attaching the scanning unit 3 to the device body 2 is described. Figure 5 This is a perspective view illustrating the area around the attachment portion 5 during attachment. Figure 6A , Figure 6B and Figure 6C This is a perspective view of the device body 2 and scanning unit 3 as shown in the attached diagram. Figure 7 This is a cross-sectional view of the area around the auxiliary part 25 when the scanning unit 3 is attached to the device body 2 and closed relative to the device body 2. Figure 8 This is a cross-sectional view of the area around the attachment portion 5 when the device body 2 and the scanning unit 3 are attached.

[0045] like Figure 5 As shown, the attachment portion 5 of the device body 2 includes a rotating shaft 51. Relative to the axial direction, the rotating shaft 51 engages with the hole portion 40 of the scanning unit 3, which has moved along the attachment direction, so as to rotatably support the scanning unit 3 relative to the device body 2. Furthermore, when the scanning unit 3 is attached, the attachment portion 5 contacts the periphery of the hole portion 40 of the scanning unit 3. Thus, relative to the axial direction, the attachment portion 5 restricts the movement of the scanning unit 3 along the attachment direction.

[0046] Relative to the axial direction, the attachment portion 5 and the hole portion 40 are arranged in each of the two ends. Although Figure 5 Only one end is illustrated, but the other end has the same configuration. In this exemplary embodiment, the device body 2 includes an attachment portion 5 containing a rotating shaft 51, and the scanning unit 3 includes a hole portion 40. Alternatively, the scanning unit 3 may include a rotating shaft, and the device body 2 may include a bearing for engaging with the rotating shaft.

[0047] Figure 6A , Figure 6B and Figure 6CThese are schematic diagrams illustrating the first, second, and third states when the scanning unit 3 is attached to the device body 2. In this exemplary embodiment, the scanning unit 3 is attached to the device body 2 by moving it axially relative to the device body 2. Figure 6A In the first state shown, the second limiting part 22, which is the limiting part 20 of the device body 2, is in contact with the limited part 33 of the scanning unit 3. More specifically, as Figure 3 As shown, the second limiting part 22 includes an inclined surface 23, and in the first state, the inclined surface 23 of the second limiting part 22 is in contact with the limited part 33.

[0048] exist Figure 6B In the second state shown, the scanning unit 3 moves to the left side along the axial direction from the first state, and the deformable portion 26 of the second limiting portion 22 is deformed. For example... Figure 6B As shown, the deformable portion 26 is configured to be deformable in the downward direction. When the scanning unit 3 moves to the left relative to the axial direction from the first state, the restrained portion 33 presses the tilted portion 23 to the left relative to the axial direction. Upon receiving such pressure, the deformable portion 26 is deformed, and the second restrained portion 22 deforms in the downward direction.

[0049] Figure 6C The third state is illustrated, in which the scanning unit 3 moves further to the left relative to the axial direction from the second state, and the scanning unit 3 is attached to the device body 2. In this state, the restricted part 33 is located between the first restricted part 21 and the second restricted part 22 and engages with the restricted part 20, and the deformable part 26 returns to its state before deformation.

[0050] Furthermore, in this state, the first limiting part 21 restricts the scanning unit 3 to move to the left relative to the axial direction. "Left" indicates the direction in which the scanning unit 3 is attached to the device body 2. In this state, the second limiting part 22 restricts the scanning unit 3 to move to the right relative to the axial direction. "Right" indicates the direction in which the scanning unit 3 is detached from the device body 2. Therefore, the movement of the scanning unit 3 in the axial direction is restricted by the limiting part 33, which is restricted by the limiting part 20. Thus, the scanning unit 3 is positioned relative to the device body 2.

[0051] This configuration allows the scanning unit 3 to be attached to the device body 2 simply by applying force relative to the device body 2 in the attachment direction. Furthermore, by using the deformation of the deformation part 26, the scanning unit 3 can be attached and detached without requiring the scanning unit 3 to be opened particularly large relative to the device body 2.

[0052] The method for removing the scanning unit 3 from the device body 2 will now be described. Regarding the removal method, with the opening-closing limiting part 10 disengaged from the guide rail part 39, the scanning unit 3 moves to the right relative to the axial direction. "Right" indicates the direction opposite to the direction in which the scanning unit 3 moves to attach to the device body 2. This rightward movement of the scanning unit 3 enables its removal.

[0053] The restricted portion 33 contacts a portion of the second restricted portion 22, rather than the inclined surface 23. This contact restricts the rightward movement of the restricted portion 33. Therefore, even if the scanning unit 3 is moved to the right (in the disassembly direction) by force, the deformable portion 26 will not deform. Thus, for example, in the event that the deformable portion 26 is deformed due to the fingers of a user or maintenance personnel, movement of the scanning unit 3 in the disassembly direction allows the scanning unit 3 to be disassembled from the device body 2.

[0054] Figure 7 This is a cross-sectional view of the auxiliary part 25 when the scanning unit 3 is attached to the device body 2 and closed. The scanning unit 3 is attached to the device body 2, and when the scanning unit 3 is closed, the assisted part 34 of the scanning unit 3 is fitted into the auxiliary part 25 of the device body 2, which has a gap C therebetween. Due to the gap C, when the scanning unit 3 does not apply a force in the axial direction to the device body 2, the auxiliary part 25 and the assisted part 34 do not contact each other.

[0055] Because the gap C is very small, when the scanning unit 3 receives a force in the axial direction, the auxiliary part 25 and the assisted part 34 contact each other to support the force from the axial direction. The auxiliary part 25 and the assisted part 34 are arranged on the rear side of the multi-functional peripheral device 1 in the same manner as the attachment part 5 and the limiting part 20. During the handling of the multi-functional peripheral device 1, even if an external force is generated in the axial direction, this configuration can support the external force in a shared manner, so that strong forces are not applied to the attachment part 5, the limiting part 20, and the deformable part 26, etc.

[0056] like Figure 8 As shown, the device body 2 includes a notch 29. The notch 29 is a groove arranged axially on the upper part of the device body 2. When the scanning unit 3 is open relative to the device body 2, a portion of the scanning unit 3 enters the notch 29. The width L of the notch 29 needs to be larger so that the scanning unit 3 can open wider relative to the device body 2. However, since increasing the width L of the notch 29 would reduce the strength of the attachment portion 5, the width L of the notch 29 is expected to be small.

[0057] In this exemplary embodiment, the attachment and removal of the scanning unit 3 to the device body 2 are described by using deformation of the deformable portion 26, rather than by opening the scanning unit 3 significantly relative to the device body 2. The opening position of the scanning unit 3 when attached to and removed from the device body 2 can be set, for example, for operations such as paper jam clearing. Therefore, the width L of the cutout 29 becomes smaller, and the strength of the attachment portion 5 can be increased.

[0058] A second exemplary embodiment of this disclosure will now be described. Configurations identical to those described above will be assigned the same reference numerals, and redundant descriptions will be omitted.

[0059] (Configuration of printer and scanner positioning)

[0060] Reference Figures 9 to 12 The configuration of positioning of the device body 2 and the scanning unit 3 according to the second exemplary embodiment of this disclosure is described.

[0061] Figure 9 This is a perspective view illustrating a multifunctional peripheral device 1 according to a second exemplary embodiment of the present disclosure. Figure 10 This is a perspective view illustrating the attachment portion 5 of the device body 2. Figure 11 This is a cross-sectional view illustrating the case where the device body 2 and the scanning unit 3 are attached. Figure 12 This is a perspective view showing the area around attachment 5.

[0062] In this exemplary embodiment, as Figure 10 As shown, the axial positioning of the device body 2 and the scanning unit 3 can be performed by the attachment portion 5 on the right side of the device body 2. The structure of the attachment portion 5 is the same as that in the first exemplary embodiment. A method for attaching the scanning unit 3 to the device body 2 according to this exemplary embodiment will be described.

[0063] like Figure 11 As shown, the attachment portion 5 on the right side of the device body 2 also serves as a limiting portion to restrict the movement of the scanning unit 3 in the axial direction. In this exemplary embodiment, the attachment portion 5 on the right side is also referred to as the limiting portion 28. In this exemplary embodiment, the scanning unit 3 includes a first limiting portion 35 and a second limiting portion 36 serving as the limiting portion 30. The first limiting portion 35 includes a resiliently deformable portion 37. Furthermore, as... Figure 12 As shown, the first restricted portion 35 includes an inclined face 38. In other words, the restricted portion 30 of the scanning unit 3 includes the first restricted portion 35, the second restricted portion 36, the deformable portion 37, and the inclined face 38.

[0064] When the scanning unit 3 is attached to the device body 2, the scanning unit 3 moves to the left relative to the axial direction (attachment direction), and the limiting part 28 and the inclined part 38 come into contact with each other.

[0065] If scanning unit 3 moves further to the left, such as Figure 12 As shown, the limiting part 28 presses against the tilting part 38, and the deforming part 37 deforms. If the scanning unit 3 moves further to the left, as... Figure 11 As shown, the scanning unit 3 is attached to the device body 2, and the limiting part 28 is located between the first limited part 35 and the second limited part 36.

[0066] When the scanning unit 3 is attached to the device body 2, the limiting part 28 restricts the movement of the first limited part 35 in the direction in which the scanning unit 3 is detached from the device body 2, relative to the axial direction. The limiting part 28 also restricts the movement of the second limited part 36 in the direction in which the scanning unit 35 is attached to the device body 2, relative to the axial direction.

[0067] In the first exemplary embodiment, when the scanning unit 3 is disassembled, if the opening-closing restriction part 10 disengages from the guide rail part 39, the deformable part 37 can be deformed, for example, by the finger of a user or maintenance personnel. The restriction on the scanning unit 3 in the axial direction can be released by the deformation of the deformable part 37, thereby making the scanning unit 3 movable and detachable.

[0068] In this exemplary embodiment, one of the attachment portions 5 serves as a limiting portion 28, and both ends of the limiting portion 28 are held in the axial direction by the limiting portion 30 of the scanning unit 3. However, in the device body 2, the attachment portions 5 and the limiting portion 28 can be separate parts. In this case, for example as in the first exemplary embodiment, the limiting portion 28 is arranged separately between the two attachment portions 5. Alternatively, both attachment portions 5 can be configured to serve as the limiting portion 28.

[0069] According to this exemplary embodiment, since it is not necessary to remove the scanning unit 3 by opening it significantly relative to the device body 2, the same effect as that obtainable in the first exemplary embodiment can be achieved. Furthermore, the limiting portion 28 and the limited portions 35 and 36 are arranged away from the center of the multifunctional peripheral device 1 relative to the axial direction. Therefore, there are no components obstructing airflow at the center, thus providing more space. Typically, in the configuration of opening and closing the scanning unit, the sheet discharge stacking unit is small, and the airflow tends to decrease. Consequently, problems such as temperature rise and condensation at the bottom of the sheet discharge unit or scanning unit may occur. In such cases, since the configuration according to this exemplary embodiment provides more space in the central portion, airflow is improved, thus reducing the likelihood of temperature rise and condensation.

[0070] Furthermore, each of the first and second exemplary embodiments is described as an example where the deformable portion is made of resin material and is integrally formed with the limiting portion or other parts of the limited portion. However, the deformable portion may also be configured as a separate, elastic member, such as a spring member. In this case, deformation of the deformable portion can be used to move and displace the limiting portion according to the first exemplary embodiment or the limited portion according to the second exemplary embodiment.

[0071] According to each of the exemplary embodiments of this disclosure, by deforming the deformable portion arranged in the restrictive part or the restrictive part of the movable unit, the unit can be moved in the axial direction of the rotation axis, so that the unit can be attached to or detached from the device body without opening the unit particularly large relative to the device body. Therefore, in the portion where the device body and the unit interfere with each other, the size of the cutout in the device body can be reduced, and the strength of the attachment portion for attaching the unit to the device body can be enhanced.

[0072] While this disclosure has been described with reference to exemplary embodiments, it should be understood that this disclosure is not limited to the disclosed exemplary embodiments. The scope of the claims should be interpreted in the broadest sense to include all such variations, equivalent structures, and functions.

Claims

1. An image forming apparatus comprising: an apparatus main body including an image forming device and a restriction portion; and a movable unit including an image reading device and detachably attached to the apparatus main body, wherein the movable unit is configured to open and close with respect to the apparatus main body by rotating about a rotation axis when the movable unit is attached to the apparatus main body, and is configured to be attached to and detached from the apparatus main body by moving in an axial direction of the rotation axis, wherein one of the apparatus main body and the movable unit includes an attachment portion including the rotation axis, and the other of the apparatus main body and the movable unit includes a bearing portion engaged with the rotation axis, wherein the movable unit includes a restricted portion configured to be engaged with the restriction portion, one of the restriction portion and the restricted portion includes a first portion and a second portion arranged in an axial direction, and the other of the restriction portion and the restricted portion is located between the first portion and the second portion in the axial direction so as to restrict movement of the movable unit in the axial direction, wherein the first portion or the second portion includes a deformed portion having elasticity, and wherein the deformed portion is configured to be deformed to enable the movable unit to be attached to and detached from the apparatus main body in the axial direction. The number of the attachment portions is a plurality of attachment portions, and the plurality of attachment portions are arranged on each of both end sides in an upper portion of a rear side of the apparatus main body with respect to the axial direction.

2. The image forming apparatus according to claim 1, wherein 3. The image forming apparatus according to claim 2, the restriction portion is located between the plurality of attachment portions with respect to the axial direction, and wherein, wherein the restriction portion and the plurality of attachment portions are arranged in the axial direction. At least one of the plurality of attachment portions functions as the restriction portion to restrict movement of the movable unit in the axial direction.

4. The image forming apparatus according to claim 2, wherein 5. The image forming apparatus according to any one of claims 1 to 4, the restriction portion includes a first restriction portion and a second restriction portion arranged in the axial direction, wherein wherein the first restriction portion restricts movement of the movable unit in a direction in which the movable unit is attached to the apparatus main body with respect to the axial direction, wherein the second restriction portion restricts movement of the movable unit in a direction in which the movable unit is detached from the apparatus main body with respect to the axial direction, wherein the deformed portion is provided in the second restriction portion, and wherein the restricted portion is located between the first restriction portion and the second restriction portion when the movable unit is attached to the apparatus main body.

6. The image forming apparatus according to any one of claims 1 to 4, the restricted portion includes a first restricted portion and a second restricted portion arranged in the axial direction, wherein wherein the first restricted portion is provided so that movement of the movable unit in a direction in which the movable unit is detached from the apparatus main body is restricted with respect to the axial direction, wherein the second restricted portion is provided so that movement of the movable unit in a direction in which the movable unit is attached to the apparatus main body is restricted with respect to the axial direction, ​ wherein the deformation portion is provided in the first restricted portion, and wherein the restriction portion is located between the first restricted portion and the second restricted portion when the movable unit is attached to the device body.

7. The image forming apparatus according to any one of claims 1 to 4, wherein, the restriction portion or the restricted portion includes an inclined surface portion inclined with respect to the axial direction, and wherein the inclined surface portion is pressed to deform the deformation portion in a case where the movable unit is attached to the device body.

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