JP7322465B2 - image forming device - Google Patents

Description

The present disclosure relates to an image forming apparatus detachably provided with a liquid reservoir.

2. Description of the Related Art Conventionally, there is known an image forming apparatus such as a printing apparatus that detachably includes a liquid reservoir such as an ink cartridge. As an image forming apparatus of this type, for example, an apparatus disclosed in Patent Document 1 includes a carriage that can reciprocate in the horizontal direction, and a plurality of liquid reservoirs are detachably fixed to the carriage. It has a structure that

JP 2014-240186 A

By the way, in this type of image forming apparatus, it is conceived that a locking member is provided as an engaging member for fixing the liquid reservoir attached to the carriage. In an image forming apparatus having such an engaging member, when the liquid reservoir is attached to the carriage, the user moves the engaging member to the open position, places the liquid reservoir on the carriage, and engages the liquid reservoir. The liquid reservoir is fixed to the carriage by moving the engagement member to the closed position while pinching the end of the member and the end of the liquid reservoir with fingers. On the other hand, when removing the liquid reservoir from the carriage, the user moves the engaging member to the open position to release the fixed state of the liquid reservoir by the engaging member, and removes the liquid reservoir from the carriage.

However, in an image forming apparatus having such an engaging member, it is possible to intuitively recognize which part of the engaging member or the liquid reservoir should be placed when the liquid reservoir is attached to or detached from the carriage. I have a problem that I can't. In addition, there is a problem of poor operability when attaching and detaching the liquid reservoir to and from the carriage.

The present disclosure has been made in view of the above circumstances, and its object is to recognize which part of the engaging member or the liquid reservoir should be put on when the liquid reservoir is attached to or detached from the carriage. An object of the present invention is to provide an image forming apparatus which can be easily operated and can improve operability.

An image forming apparatus according to a first aspect of the present disclosure includes: an engaging member movable between a first position and a second position with respect to a carriage and having a first finger hook; is fixed to the carriage by moving to the first position, and can be removed from the carriage by moving the engaging member to the second position, and has a second finger hook portion. and the direction in which the engaging member moves from the first position to the second position, excluding the vertical component, is defined as a first direction, and the vertical direction from top to bottom is defined as a second direction. When defined, the second finger hook portion is characterized by having at least one of a recess recessed in the first direction and a recess recessed in the second direction.

Further, the image forming apparatus of the second embodiment according to the present disclosure is movable between the first position and the second position with respect to the carriage, and has a first finger hook portion and a second finger hook portion. a liquid reservoir fixed to the carriage by moving the engaging member to the first position and removable from the carriage by moving the engaging member to the second position; When the first direction is defined as the direction in which the engaging member moves from the first position to the second position except for the vertical component, the second finger hook portion has a concave portion recessed in the first direction. It is characterized by having

According to the image forming apparatus of the first aspect of the present disclosure, the engagement member is provided with the first finger hook portion, and the liquid reservoir portion is provided with the second finger hook portion. , the user can intuitively recognize that the finger should be placed on the first finger hooking portion of the engaging member and the second finger hooking portion of the liquid reservoir. Furthermore, it is possible to improve the operability when attaching the liquid reservoir to the carriage.

Further, according to the image forming apparatus of the second aspect of the present disclosure, the engagement member is provided with the second finger hook portion, so that when the liquid reservoir is to be removed from the carriage, the user can engage the engagement member. It can be intuitively recognized that it is sufficient to put a finger on the second finger-holding portion of the member. Furthermore, it is possible to improve the operability when removing the liquid reservoir from the carriage.

1 is a plan view schematically showing a configuration example of an image forming apparatus according to the present disclosure, showing an example of a state in which a locking member has moved to a closed position; FIG. 1 is a plan view schematically showing a configuration example of an image forming apparatus according to the present disclosure, showing an example of a state in which a locking member has moved to an open position; FIG. FIG. 2 is a side view schematically showing a configuration example of a carriage and lock member according to the present disclosure; FIG. 1 is a plan view (part 1) schematically showing a modification of an image forming apparatus according to the present disclosure; FIG. 2 is a plan view schematically showing a modified example of the image forming apparatus according to the present disclosure (No. 2); FIG. 4 is a front view schematically showing a modification of the liquid reservoir according to the present disclosure; FIG. 4 schematically illustrates several variations of liquid reservoirs according to the present disclosure; A perspective view schematically showing a modification of the liquid reservoir according to the present disclosure. FIG. 11 is a plan view (part 1) schematically showing a modification of the liquid reservoir and the engaging member according to the present disclosure; FIG. 1 is a diagram (part 1) schematically showing a plurality of modifications of a liquid reservoir and an engaging member according to the present disclosure; FIG. 2 is a plan view schematically showing a modified example of a liquid reservoir and an engaging member according to the present disclosure (No. 2); FIG. 3 is a plan view schematically showing a modification of the liquid reservoir and the engaging member according to the present disclosure (No. 3); FIG. 4 is a plan view schematically showing a modification of the liquid reservoir and the engaging member according to the present disclosure (No. 4); FIG. 5 is a plan view schematically showing a modification of the liquid reservoir and the engaging member according to the present disclosure (No. 5); FIG. 6 is a plan view schematically showing a modification of the liquid reservoir and the engaging member according to the present disclosure (No. 6); Plan view schematically showing a modification of the liquid reservoir and the engaging member according to the present disclosure (No. 7) FIG. 8 is a plan view schematically showing a modification of the liquid reservoir and the engaging member according to the present disclosure (No. 8); FIG. 2 is a diagram (part 2) schematically showing a plurality of modifications of the liquid reservoir and the engaging member according to the present disclosure; FIG. 9 is a plan view schematically showing a modification of the liquid reservoir and the engaging member according to the present disclosure (No. 9); FIG. 10 is a plan view schematically showing a modification of the liquid reservoir and engaging member according to the present disclosure (No. 10);

An embodiment of an image forming apparatus of the present disclosure will be described below with reference to the drawings. An image forming apparatus 1 illustrated in FIGS. 1 and 2 is, for example, a so-called printing apparatus that forms an image by ejecting ink, which is an example of a liquid, onto an image forming object such as a sheet. The image forming apparatus 1 includes a carriage 3 and the like inside a substantially rectangular box-shaped housing 2 that constitutes its outer shell. In this case, the carriage 3 is provided so as to be reciprocally movable along the left-right direction of the housing 2 as indicated by the dashed arrow A by a well-known carriage moving mechanism (not shown) provided inside the housing 2. there is

A plurality of, in this case, two ink cartridges 4 are detachably attached to the carriage 3 . The upper surface of the housing 2 is provided with an opening 2a and a lid member (not shown) for opening and closing the opening 2a. A user can perform maintenance such as replacement of the ink cartridge 4 through the opening 2a by opening the cover member.

The ink cartridge 4 is an example of a liquid reservoir. In this case, one ink cartridge 4 stores black ink, which is an example of liquid. The other ink cartridge 4 stores cyan ink, magenta ink, and yellow ink, which are all examples of liquids. In this case, the ink cartridge 4 that stores black ink is arranged on the right side of the carriage 3 when viewed from the front side of the image forming apparatus 1 . On the other hand, the ink cartridges 4 storing cyan ink, magenta ink, and yellow ink are arranged on the left side of the carriage 3 when viewed from the front side of the image forming apparatus 1 . The image forming apparatus 1 may be configured such that the ink cartridges 4 storing cyan ink, magenta ink, and yellow ink are placed on the right side of the carriage 3 and the ink cartridges 4 storing black ink are placed on the left side.

The image forming apparatus 1 further includes a locking member 5 for fixing the ink cartridge 4 to the carriage 3. As shown in FIG. Lock member 5 is an example of an engaging member. In this case, the lock member 5 is provided above the rear end portion of the carriage 3 so as to be movable in the front-rear direction as indicated by the dashed arrow B. As shown in FIG. The locking member 5 is movable by manual operation by the user. The lock member 5 is configured to be movable between a closed position illustrated in FIG. 1 and an open position illustrated in FIG. The closed position illustrated in FIG. 1 is an example of a first position, and the open position illustrated in FIG. 2 is an example of a second position. As illustrated in FIG. 3, the lock member 5 is provided at the rear end of the carriage 3 so as to be vertically rotatable. It is movable between open positions.

Hereinafter, the direction obtained by removing the vertical component from the direction in which the lock member 5 moves from the closed position to the open position, in this case, the front-rear direction of the image forming apparatus 1 is defined as the first direction. Further, the direction from the front side to the rear side of the image forming apparatus 1 is defined as the plus side of the first direction, and the direction from the rear side to the front side is defined as the minus side of the first direction. Further, the direction from top to bottom in the vertical direction, in this case, the direction from the top to the bottom of the image forming apparatus 1 is defined as the second direction. Further, the direction from the upper side to the lower side of the image forming apparatus 1 is defined as the positive side of the second direction, and the direction from the lower side to the upper side is defined as the negative side of the second direction. A direction orthogonal to both the first direction and the second direction, in this case, the horizontal direction of the image forming apparatus 1 is defined as a third direction. Further, the direction from the right side to the left side of the image forming apparatus 1 is defined as the positive side of the third direction, and the direction from the left side to the right side is defined as the negative side of the third direction. In addition, regarding the horizontal direction of the image forming apparatus 1, the left side is defined as the left side and the right side is defined as the right side when viewed from the user who is present in front of the image forming apparatus 1. FIG.

In the image forming apparatus 1 whose direction is defined as described above, the lock member 5 moved to the closed position engages with the upper portion of the rear end portion of the ink cartridge 4 placed on the carriage 3 , thereby closing the carriage 3 . , the ink cartridge 4 is fixed. On the other hand, the lock member 5 moved to the open position releases the engagement state of the ink cartridge 4 with the carriage 3, in other words, releases the fixed state. As a result, the ink cartridge 4 becomes removable from the carriage 3 .

A first finger hook 51 is provided at one end of the locking member 5, in this case, at the rear end. In this case, the first finger hook portion 51 is configured by a concave portion that is smoothly cut from the rear side to the front side in the shape of an arc. That is, the first finger hook portion is configured as a concave portion recessed toward the minus side in the first direction at the end portion of the locking member 5 on the plus side in the first direction. Further, the first finger hooking portion 51 is provided substantially in the center of the rear end portion of the lock member 5 in the left-right direction, that is, substantially in the center in the third direction.

On the other hand, a second finger hook portion 42 is provided on the upper portion of the front end portion of the ink cartridge 4 . That is, the second finger hooking portion 42 is provided at the front end of the ink cartridge 4 on the side opposite to the first finger hooking portion 51 . In other words, the second finger hooking portion 42 is configured as a concave portion recessed from the negative side in the first direction toward the positive side at the end of the ink cartridge 4 on the negative side opposite to the positive side in the first direction. . In this case, the second finger hooking portion 42 is configured by a convex portion projecting upward from the upper surface of the ink cartridge 4, that is, a so-called rib. A part of the second finger hook 42, in this case, a part that is substantially central in the left-right direction, that is, in the third direction when attached to the carriage 3, is formed in a smooth arc from the front side to the rear side. A formed recess 42a is provided. That is, the recessed portion 42a is a recessed portion that is recessed from the minus side in the first direction toward the plus side. Further, the second finger hooking portion 42 has a rib-like configuration in which a concave portion 42a, which is a part thereof, is recessed toward the positive side in the first direction, and the entirety of the second finger hooking portion 42 protrudes toward the side opposite to the positive side in the second direction, that is, toward the negative side. It's becoming

In the image forming apparatus 1, the first finger hooking portion 51 on the locking member 5 side and the second finger hooking portion 42 on the ink cartridge 4 side face each other in the front-rear direction. The image forming apparatus 1 may be configured such that the first finger hooking portion 51 on the locking member 5 side and the second finger hooking portion 42 on the ink cartridge 4 side are provided at positions shifted in the left-right direction.

According to the image forming apparatus 1 according to the present disclosure, the locking member 5 is provided with the first finger hooking portion 51 , while the second finger hooking portion 51 is provided at the end of the ink cartridge 4 opposite to the first finger hooking portion 51 . A finger hook 42 is provided. According to this configuration, when the ink cartridge 4 is attached to the carriage 3 , the user puts his/her finger on the first finger hook portion 51 of the lock member 5 and the second finger hook portion 42 of the ink cartridge 4 that have moved to the open position. , the lock member 5 can be moved to the closed position while the rear end side of the lock member 5 and the front end side of the ink cartridge 4 are appropriately sandwiched between fingers. In other words, the ink cartridge 4 can be locked to the carriage 3 . Therefore, the work of attaching the ink cartridge 4 can be easily performed.

Then, when attaching the ink cartridge 4 to the carriage 3, the user can intuitively recognize that it is sufficient to put his or her finger on the arc-shaped first finger-holding portion 51 and second finger-holding portion 42, respectively. Therefore, when attaching the ink cartridge 4 to the carriage 3, it is possible to easily recognize which part of the lock member 5 and the ink cartridge 4 should be put.

Furthermore, as illustrated in FIG. 4, the image forming apparatus 1 may have a configuration in which a second finger hook portion 52 is provided at the other end portion of the locking member 5, in this case, at the front end portion. In other words, the image forming apparatus 1 may have a configuration in which the second finger hook portion 52 is provided at the end portion of the lock member 5 on the minus side in the first direction. In this case, the second finger hooking portion 52 is configured by a concave portion that is cut in a smooth arc shape from the front side to the rear side. That is, the second finger hooking portion 52 is configured as a recess recessed from the minus side in the first direction to the plus side. The second finger hooking portion 52 is provided at the front end portion of the lock member 5 in the left-right direction, that is, substantially in the center in the third direction. The second finger hooking portion 52 is also an example of a third finger hooking portion.

According to this configuration, when the user removes the ink cartridge 4 from the carriage 3 , the user puts his or her finger on the second finger hook portion 52 to move the lock member 5 to the open position. can be easily released. Therefore, the ink cartridge 4 can be removed easily.

Then, when removing the ink cartridge 4 from the carriage 3 , the user can intuitively recognize that the finger should be placed on the arc-shaped second finger hook portion 52 . Therefore, when removing the ink cartridge 4 from the carriage 3, it is possible to easily recognize which part of the lock member 5 to put a finger on.

The basic configuration example related to the second finger rest part of the present disclosure has been described above. Next, modified examples of the second finger hook portion of the present disclosure will be described in order.

As illustrated in FIG. 5, the ink cartridge 4 may have a configuration in which a second finger hooking portion 142 configured by, for example, a concave portion is provided at the end opposite to the first finger hooking portion 51 . With this configuration as well, the user can intuitively recognize that, when attaching the ink cartridge 4 to the carriage 3 , the finger should be placed on the arc-shaped second finger hook portion 142 . Therefore, when attaching the ink cartridge 4 to the carriage 3, it is possible to easily recognize which part of the ink cartridge 4 to put a finger on.

Further, as illustrated in FIG. 6, the ink cartridge 4 has a configuration in which a cartridge body portion 4a and a cartridge lid portion 4b are combined. Therefore, the second finger hook portion 142 may be provided over both the cartridge main body portion 4a and the cartridge lid portion 4b, or may be provided only on the cartridge main body portion 4a or only on the cartridge lid portion 4b (not shown). can be The cartridge main body 4a is a component that includes a tank portion that mainly stores ink, a nozzle portion that ejects ink, and the like. On the other hand, the cartridge lid portion 4b is a component that closes the opening of the cartridge body portion 4a.

Further, the ink cartridge 4 may have a configuration in which a second finger hooking portion configured by, for example, a convex portion is provided at the end portion opposite to the first finger hooking portion 51 .

The present disclosure is not limited to the above-described embodiment, and various modifications and extensions are possible without departing from the scope of the present disclosure. For example, as illustrated in FIG. 7, various shape patterns can be adopted for the shape pattern of the second finger rest. Here, the pattern A is a pattern in which the second finger hook portion is formed by a wedge-shaped concave portion extending from the front side to the rear side. Pattern B is a pattern in which the second finger hook portion is formed by a concave portion formed stepwise from the front side to the rear side. Pattern C is a pattern in which the second finger hook portion is formed by a concave portion formed in a smooth arc from the front side to the rear side, and the concave portion is divided in the middle. Pattern D is a pattern in which the second finger hook portion is formed by a wedge-shaped concave portion extending from the front side to the rear side, and the concave portion is divided in the middle. Pattern E is a pattern in which the second finger hooking portion is formed by recesses stepped from the front side to the rear side, and the recesses are divided in the middle.

In addition, according to the present inventor, a verification result has been obtained that the smoother the shape of the second finger rest, the higher the operability. In addition, a verification result has been obtained that the operability is higher with the second finger hook portion that is continuous as a whole than with the one that is divided in the middle. In addition, although not shown, the configuration pattern of the second finger resting part has a shape on which the user's fingers can be rested, more preferably, it is intuitively recognizable as a part on which the finger is rested. Various shapes can be adopted as long as they are easy to hang. Likewise, the second finger hooking portion 52 of the locking member 5 may have various shapes without departing from the gist of the present disclosure. Similarly, for the first finger hook portion 51 of the lock member 5, various shapes can be adopted without departing from the gist of the present disclosure.

Further, the first finger hooking portion and the second finger hooking portion may be configured to include a plurality of recesses, may be configured to include a plurality of protrusions, or may be configured to have both recesses and protrusions. Also, the first finger hooking portion and the second finger hooking portion may have, for example, a wavy shape, a zigzag shape, or the like.

Further, the ink cartridge 4 may have the first finger-holding portion or the second finger-holding portion having different shapes, for example, according to the type of ink to be stored, the volume of ink to be stored, and the like.

Further, the image forming apparatus 1 may be configured to include three or more ink cartridges 4 . In addition, the technical idea according to the present disclosure can be applied not only to apparatuses that form images with ink, but also to apparatuses that form images with liquid other than ink.

Further, as illustrated in FIG. 8, the ink cartridge 4 may be configured to include a second finger hook portion 242 which is a concave portion recessed toward the positive side in the second direction, that is, downward. With this configuration as well, the user can intuitively recognize that the user should put his or her finger on the second finger hook portion 242 when attaching the ink cartridge 4 to the carriage 3 . Therefore, when attaching the ink cartridge 4 to the carriage 3, it is possible to easily recognize which part of the ink cartridge 4 to put a finger on.

Further, as illustrated in FIG. 9, the ink cartridge 4 has a configuration in which the dimension S1 of the second finger hooking portion 142 along the third direction, that is, the horizontal direction is larger than the dimension S2 of the first finger hooking portion 51 along the third direction. may be According to this configuration, the user can easily put his/her thumb on the larger second finger hook portion 142 , so that the ink cartridge 4 can be attached to the carriage 3 more easily. Although not shown, the ink cartridge 4 may have a configuration in which the dimension of the first finger hooking portion 51 along the third direction is larger than the dimension of the second finger hooking portion 142 along the first direction.

Further, as illustrated in patterns A to F of FIG. 10, when the image forming apparatus 1 includes a plurality of ink cartridges 4, the first finger hooking portion 51 is at least one of the plurality of locking members 5. The second finger hooking portion 142 may be provided on at least one of the plurality of ink cartridges 4 .

Further, as illustrated in FIG. 11, the image forming apparatus 1 may have a configuration in which the plurality of ink cartridges 4 have different sizes and shapes. In this case, the shape, size, position, etc. of the second finger hooking portion 142 can be changed as appropriate.

Further, as illustrated in FIG. 12, the image forming apparatus 1 may have a configuration in which the plurality of locking members 5 have different sizes and shapes. In this case, the shape, size, position, etc. of the first finger hooking portion 51 can be changed as appropriate.

Further, as illustrated in FIG. 13, two adjacent lock members 5 among the plurality of lock members 5 may each have a first finger hook portion 51 on the other lock member 5 side, that is, inside. good. According to this configuration, the user can operate the two locking members 5 with one finger.

Also, as illustrated in FIG. 14, two adjacent locking members 5 among the plurality of locking members 5 each have a first finger hooking portion 51 on the opposite side of the other locking member 5, that is, on the outer side. may be configured. According to this configuration, for example, by operating the right lock member 5 with the fingers of the right hand and the left lock member 5 with the fingers of the left hand, it is easy to operate the two lock members 5 with both hands.

Further, as illustrated in FIG. 15, two adjacent ink cartridges 4 among the plurality of ink cartridges 4 may each have a second finger hook portion 142 on the side of the other ink cartridge 4, i.e., inside. good. With this configuration, the user can operate the two ink cartridges 4 with one finger.

Further, as illustrated in FIG. 16, two adjacent ink cartridges 4 among the plurality of ink cartridges 4 each have a second finger hook portion 142 on the opposite side of the other ink cartridge 4, that is, on the outer side. may be configured. For example, by operating the right ink cartridge 4 with the fingers of the right hand and the left ink cartridge 4 with the fingers of the left hand, it is easy to operate the two locking members 5 with both hands.

Further, as illustrated in FIG. 17, the ink cartridge 4 has a dimension S3 along the third direction of the second finger hooking portion 52, in this case, the lateral direction, which is larger than a dimension S4 along the third direction of the first finger hooking portion 51. An enlarged configuration may also be used. According to this configuration, the user can easily put his/her thumb on the second finger hooking portion 52 which is formed to be larger, so that the ink cartridge 4 can be removed from the carriage 3 more easily. Although not shown, the ink cartridge 4 may be configured such that the dimension of the first finger hooking portion 51 along the third direction is larger than the dimension of the second finger hooking portion 52 along the first direction.

Further, as illustrated in patterns A to F of FIG. 18 , when the image forming apparatus 1 includes a plurality of locking members 5, the first finger hooking portion 51 may be at least one of the plurality of locking members 5. The second finger hooking portion 52 may be provided on at least one of the plurality of locking members 5 .

Further, as illustrated in FIG. 19, two adjacent locking members 5 among the plurality of locking members 5 may each have a second finger hook portion 52 on the side of the other locking member 5, that is, on the inner side. good. According to this configuration, the user can operate the two locking members 5 with one finger.

Also, as illustrated in FIG. 20 , two adjacent locking members 5 among the plurality of locking members 5 each have a second finger hook portion 52 on the opposite side of the other locking member 5, that is, on the outer side. may be configured. According to this configuration, for example, by operating the right lock member 5 with the fingers of the right hand and the left lock member 5 with the fingers of the left hand, it is easy to operate the two lock members 5 with both hands.

Note that the finger hook may be configured to be detachable.

1: Image forming apparatus 3: Carriage 4: Ink cartridge (liquid reservoir) 4a: Cartridge body 4b: Cartridge cover 5: Lock member (engagement member) 42: Second finger hook 51 : first finger hooking portion, 52: second finger hooking portion, 142: second finger hooking portion

Claims (11)

an engaging member provided on the carriage, movable between a first position and a second position with respect to the carriage, and having a first finger rest;
The engaging member is fixed to the carriage by moving to the first position, and can be removed from the carriage by moving the engaging member to the second position. a liquid reservoir having
with
A first direction is a direction in which the engaging member moves from the first position to the second position without a vertical component, and a second direction is a direction from top to bottom in the vertical direction . When a direction perpendicular to the first direction and the second direction is defined as a third direction , the first finger hooking portion includes a concave portion recessed toward the minus side of the first direction, and the second finger hooking portion a concave portion recessed in the positive direction , the concave portion of the first finger hook portion and the concave portion of the second finger hook portion facing each other along the first direction;
The image forming apparatus , wherein the dimension of the second finger rest portion along the third direction is larger than the dimension of the first finger rest portion along the third direction. 2. The image forming apparatus according to claim 1, wherein the second finger hook is provided at an end of the liquid reservoir on the upstream side in the first direction. 3. The image forming apparatus according to claim 1 , wherein the second finger hook protrudes in a direction opposite to the second direction. The liquid reservoir has a main body and a lid,
4. The image forming apparatus according to claim 1, wherein the second finger hooking portion is provided on at least one of the body portion and the lid portion. comprising a plurality of liquid reservoirs,
5. The image forming apparatus according to claim 1, wherein the second finger hook portion is provided in at least one of the plurality of liquid storage portions. 6. The image forming apparatus according to claim 5 , wherein the shape of at least one of the plurality of liquid reservoirs is different from the shape of the other liquid reservoirs. comprising a plurality of the engaging members,
7. The image forming apparatus according to claim 5 , wherein the shape of at least one of the plurality of engaging members is different from that of the other engaging members. Two adjacent engaging members among the plurality of engaging members each have the first finger hook portion on the side of the other engaging member in the third direction. Item 8. The image forming apparatus according to any one of Items 5 to 7 . Two liquid reservoirs adjacent to each other among the plurality of liquid reservoirs each have the second finger hook portion on the side of the other liquid reservoir in the third direction. Item 9. The image forming apparatus according to any one of Items 5 to 8 . at least one of the plurality of engaging members has a third finger hook portion at a portion upstream of the first finger hook portion in the first direction;
10. The image forming apparatus according to any one of claims 5 to 9 , wherein the third finger hook portion is a recess recessed in the first direction. 11. The image forming apparatus according to any one of claims 1 to 10, wherein the engaging member has a recess recessed toward the positive side in the first direction.

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