JP2019082739A - Image forming apparatus - Google Patents

Abstract

An image forming apparatus capable of reliably preventing forgetting or losing a cover member. The image forming apparatus includes an image forming unit 15 that is detachable at a predetermined position of the apparatus main body. The device main body is pressed and released, and a switch member that detects an open / close state of an opening / closing member that opens and closes an opening formed in the device main body, and a posture in which the switch member can be pressed and a posture in which the switch member cannot be pressed The image forming unit 15 includes a detachable cover member 51, and the cover member 51 is mounted at the predetermined position of the apparatus main body. When mounted on the image forming unit 15, the pressing member is configured to be displaced from the non-pressable posture to the pressable posture. [Selection] Figure 11

Description

  The present invention relates to an image forming apparatus provided with a removable imaging unit.

  In an image forming apparatus such as a printer or a multifunction peripheral, an imaging unit may be detachably provided in the apparatus main body, and a drive source of the imaging unit may be provided in the apparatus main body. The imaging unit and the drive source are provided with lever members operated to connect the two and a connector connected to each other. Such lever members and connectors are operated by a service person when necessary. For this reason, in order to prevent a general user from operating erroneously, it is general to be protected by the cover member provided detachably, as it describes in patent document 1. FIG.

JP, 2014-194485, A

  However, such a cover member has a problem that it is easy to forget or lose it once it has been removed. If the cover member is not attached, the lever member and the connector remain exposed, which may cause erroneous operation.

  Therefore, in consideration of the above circumstances, the present invention has an object to provide an image forming apparatus capable of reliably preventing a cover member from being forgotten or lost in an image forming apparatus provided with a detachable image forming unit.

  In order to achieve the above object, an image forming apparatus according to the present invention is an image forming apparatus including an imaging unit which can be attached and detached at a predetermined position of an apparatus body, wherein the apparatus body is pressed and released. A switch member for detecting the open / close state of the opening / closing member for opening / closing the opening formed in the device body; and a pressing member provided to be displaced between a pressable posture and a non-pressable posture. And the image forming unit includes a cover member to be attached and detached, and the cover member is mounted on the image forming unit mounted at the predetermined position of the apparatus main body. It is characterized in that it is configured to be displaced from the unpressable attitude to the depressible attitude.

  In the image forming apparatus according to the present invention, the device main body includes an operation member storage portion for storing the switch member and the pressing member, the operation member storage portion has an opening, and the cover member is of the device main body. When mounted on the image forming unit mounted at the predetermined position, the image forming unit has a pressing piece that contacts the pressing member through the opening, and the pressing member is pressed by the pressing piece. It may be characterized in that it is displaced from the unpressable attitude to the depressible attitude.

  In the image forming apparatus according to the present invention, the apparatus main body further includes a drive lever for slidingly connecting and disconnecting the imaging unit and the drive source by sliding, and the drive lever includes a manually operated head unit. The cover member may cover the head portion and protect the head portion from the outside when the cover member is mounted on the imaging unit mounted at the predetermined position of the apparatus main body. .

  In the image forming apparatus of the present invention, the imaging unit and the cover member are respectively provided with a mounting hole and a mounting piece which are engaged when the cover member is mounted on the imaging unit. The mounting hole and the mounting piece may have non-compatible shapes which are different in shape for each specification of the image forming unit.

  According to the present invention, in an image forming apparatus provided with an imaging unit in which a cover member for protecting a lever member and a connector is detachably provided, it is possible to reliably prevent the installation failure or loss of the cover member.

FIG. 1 is a perspective view of a color printer according to an embodiment of the present invention. In a color printer concerning one embodiment of the present invention, it is a perspective view showing the state where the upper surface cover turned. FIG. 1 is a front view showing an internal structure of a color printer according to an embodiment of the present invention. In a color printer concerning one embodiment of the present invention, it is a perspective view showing an operation member seat. In a color printer concerning one embodiment of the present invention, it is a perspective view showing the inside of an operation member seat. In a color printer concerning one embodiment of the present invention, it is a front view showing a left end part of a unit seat part. FIG. 6 is a perspective view showing a left end portion of the intermediate transfer unit in the color printer according to the embodiment of the present invention. FIG. 8A is a perspective view showing a lock member and an engagement recess which are engaged with each other in the color printer according to the embodiment of the present invention, showing a left end portion of the intermediate transfer unit; ) Is a front view showing a lock piece. FIG. 9A is a first direction, and FIG. 9B is a second direction, in the color printer according to the embodiment of the present invention, showing the cover member. FIG. 2 is a perspective view showing a lock member in the color printer according to the embodiment of the present invention. FIG. 6 is a perspective view showing a cover member mounted to the intermediate transfer unit in a first direction in the color printer according to the embodiment of the present invention. In the color printer concerning one embodiment of the present invention, it is a perspective view showing a pressing member at the time of cover member wearing. FIG. 6 is a perspective view showing a cover member mounted on the intermediate transfer unit in a second orientation in the color printer according to the embodiment of the present invention. In a color printer concerning one embodiment of the present invention, it is a figure explaining lock operation of a cover member by a lock member. In the color printer concerning one embodiment of the present invention, it is a perspective view showing engagement with a lock piece and a lock member. FIG. 6 is a perspective view showing an intermediate transfer unit in which the removed cover member is attached and removed from the unit storage portion in the color printer according to the embodiment of the present invention.

  Hereinafter, an image forming apparatus according to an embodiment of the present invention will be described with reference to the drawings.

  First, the entire configuration of a color printer 1 as an image forming apparatus according to the present embodiment will be described with reference to FIGS. 1 to 3. FIG. 1 is a perspective view showing a color printer, FIG. 2 is a perspective view showing a color printer in which an upper surface opening is opened by rotating an upper surface cover, and FIG. 3 is a cross sectional view schematically showing an internal structure of the color printer 1 . In the following description, the front-rear direction shown in FIG. 1 is referred to as the front-rear direction of the color printer, and the left-right direction is based on the direction when the color printer is viewed from the front.

  As shown in FIGS. 1 and 2, the apparatus main body 2 of the color printer 1 is formed with an opening 2 a on the top surface. Further, an upper surface cover 3 as an opening and closing member for opening and closing the opening 2a is provided on the device body 2 so as to be rotatable about a rear end. Below the opening 2a, a container housing portion 4 is formed, and below the container housing portion 4, a unit housing portion 5 is formed.

  As shown in FIG. 3, the apparatus main body 2 is provided with an image forming unit 7 that forms an image on a sheet, and a sheet feeding cassette 8 in which the sheet on which the image is formed is stored. The image forming unit 7 includes an intermediate transfer unit 10 as an image forming unit for forming an image, four image forming units 11 corresponding to four color toners (Y, M, C, K), and an exposure device 12. And a fixing device 13. The intermediate transfer unit 10 includes an intermediate transfer belt 16 supported by the housing 15 so as to be able to circulate and to be transported. The intermediate transfer unit 10 is detachably provided in the unit housing 5. The four image forming units 11 are arranged below the unit accommodating portion 5 in the front-rear direction. Each image forming unit 11 forms a full color toner image on the surface of the intermediate transfer belt 16 by forming a toner image based on the image data exposed by the exposure device 12 on the surface of the intermediate transfer belt 16. . The fixing device 13 is disposed above the rear of the unit housing 5 and fixes the full-color toner image transferred to the sheet to the sheet. A toner container 18 containing toner of each color is attached to and detached from the container housing portion 4.

  As shown in FIG. 2, by turning the upper surface cover 3 rearward, the upper surface opening 2 a of the apparatus main body 2 is opened, and the toner container 18 is attached to and detached from the container housing portion 4. When all the toner containers 18 are removed, the unit accommodating portion 5 is opened through the container accommodating portion 4 so that the intermediate transfer unit 10 is attached to and detached from the unit accommodating portion 5. The intermediate transfer unit 10 is extracted diagonally forward from the upper surface opening 2a. At the front right corner of the lower surface of the upper surface cover 3, an actuator pin 21 projecting downward is provided upright.

  In the color printer 1 having such a configuration, after the toner image of the full color image forming portion 7 is formed on the sheet fed from the sheet feeding cassette 8, the sheet discharge tray 3a provided on the upper surface cover 3 Discharged into

  Next, the container accommodation unit 4 will be described with reference to FIGS. 4 and 5. FIG. 4 is a perspective view showing the left front corner of the container accommodating portion, and FIG. 5 is a perspective view of the hollow portion of the operating member accommodating portion as viewed from the left side.

  As shown in FIG. 4, a hollow operation member accommodating portion 31 is formed at the left front corner of the container accommodating portion 4. As shown in FIG. 5, the operation lever accommodating portion 31 accommodates the drive lever 33, the open / close switch 34, and the pressing member 35. A rectangular opening 36 is formed in the upper wall of the operation member housing portion 31. When the upper surface opening 2a of the apparatus body 2 is closed by the upper surface cover 3, the actuator pin 21 (see FIG. 2) erected on the upper surface cover 3 can be inserted into the opening 36.

  As shown in FIG. 4, a vertically-long rectangular guide hole 37 is formed in the right wall of the operation member housing portion 31 below the opening 36 formed in the upper wall. At the upper end of the guide hole 37, a horizontally long rectangular first opening 38 is formed. Furthermore, a rectangular second opening 39 is formed at the lower rear of the first opening 38.

  Furthermore, as shown in FIG. 5, a support shaft 40 projecting inward is provided upright on the inner surface of the right wall. The support shaft 40 is disposed obliquely above the front of the second opening 39.

  The drive lever 33 is a member for connecting and disconnecting the connecting portion of the four image forming units 11 and the connecting portion of a drive source (not shown) provided in the apparatus main body 2. As shown in FIG. 4, the head portion 33 a of the drive lever 33 engages with a guide hole 37 formed in the right wall of the operation member accommodation portion 31, and can slide vertically along the guide hole 37. It is supported. By pulling up the drive lever 33, the connection portion of each image forming unit 11 and the connection portion of the drive source are connected, and when the drive lever 33 is pulled down, the connection is released.

  The open / close switch 34 is a push-type switch that detects that the upper surface opening 2 a of the device body 2 is closed by the upper surface cover 3. As shown in FIG. 5, the open / close switch 34 has a main body portion 34 a and a switch portion 34 b which is pushed into the main body portion 34 a, and the switch portion 34 b faces upward, above the operation member housing portion 31. It is disposed below the opening 36 formed in the wall.

  The pressing member 35 is a member which is interposed between the opening 36 and the open / close switch 34 and pushes the switch portion 34 b of the open / close switch 34. The pressing member 35 is a vertically long substantially rectangular parallelepiped shape, a pressed portion 35a is formed on the upper end surface, and a pressing portion 35b is formed on the lower end surface. A long hole 35c is formed along the longitudinal direction of the pressing member 35 between the pressed portion 35a and the pressing portion 35b. Below the long hole 35c, a rectangular parallelepiped protrusion 35d protruding rearward is formed. A guide surface which is inclined rearward is formed on the right surface of the protrusion 35d.

  A support shaft 40, which protrudes from the right wall of the operation member storage portion 31 into the hollow portion, is engaged with the long hole 35c of the pressing member 35. Thus, the pressing member 35 is rotatably supported about the support shaft 40. Further, a spring 43 is interposed between the protrusion 35 d of the pressing member 35 and the operation member housing portion 31. The spring 43 biases the pressing member 35 clockwise and upward in FIG. 5 around the support shaft 40. By being urged in this manner, in the pressing member 35, as shown in FIG. 5, the pressed portion 35a is separated forward from the opening 36, and the pressing portion 35b is moved backward from the switch portion 34b of the open / close switch 34. It becomes an inclined posture separated. That is, the pressing member 35 can not press the switch portion 34 b of the open / close switch 34. On the other hand, when the pressing member 35 is turned to be in the vertical posture against the biasing force of the spring 43, the pressed portion 35a is positioned directly below the opening 36, and the pressing portion 35b is directly above the switch portion 34b. The position is such that the switch portion 34 b of the open / close switch 34 can be pressed.

  Next, the unit accommodating portion 5 will be described with reference to FIG. FIG. 6 is a side view showing the front end of the left side of the unit housing portion. A horizontally long rectangular engagement recess 45 is formed at the front end of the left surface of the unit housing 5. Below the engagement recess 45, a support piece 46 extending rightward is formed.

  Next, the intermediate transfer unit 10 will be described with reference to FIGS. 7 to 8. FIG. 7 is a perspective view showing the inside of the accommodation recess of the intermediate transfer unit, FIG. 8 (A) is a perspective view showing the left wall of the accommodation recess, and FIG. 8 (B) is a front view showing the lock piece.

  As shown in FIG. 7, the housing 15 of the intermediate transfer unit 10 is formed with a housing recess 15 a that is recessed upward at the front end. A cover member 51 is detachably provided on the upper surface of the housing recess 15a, and a lock member 52 is provided in the housing recess 15a.

  Three mounting holes 55 are opened in the front-rear direction in the upper wall of the housing recess 15a. Furthermore, on the right side of the mounting hole 55, a rectangular first insertion opening 56 which is long in the front-rear direction is opened. A rectangular second insertion opening 57 is opened on the right rear side of the first insertion opening 56.

  On the inner surface of the rear wall of the housing recess 15a, a support shaft 59 projecting inward from the right side of the first insertion opening 56 is provided upright.

  A horizontally long rectangular opening 61 is formed in the left wall of the housing recess 15a. Further, as shown in FIG. 8A, horizontal upper wall portions 62 and lower wall portions 63 are formed on the outer side (left side) of the opening 61 at a predetermined interval in the vertical direction. As shown in FIG. 8B, an upper opening 62a and a lower opening 63a, which are horizontally long in the front-rear direction, are formed in the upper wall portion 62 and the lower wall portion 63, respectively.

  A lock piece 65 is slidably supported in the vertical direction so as to cross the gap between the upper opening 62a and the lower opening 63a. As shown in FIG. 8B, the lock piece 65 has a rectangular plate-shaped main body 65a and a pair of legs 65b extending downward from both ends of the lower end surface of the main body 65a. Further, between the pair of leg portions 65b, a projection 65c is formed as an uneven portion which engages with the lock member 52. The length of the projection 65c is shorter than that of the pair of legs 65b. When the lock piece 65 is slid upward, a gap of a predetermined height is formed between the pair of leg portions 65 b, the protrusion 65 c and the lower wall portion 63.

  Next, the cover member 51 will be described with reference to FIG. FIG. 9 is a perspective view showing the cover member, FIG. 9 (A) shows a first direction, and FIG. 9 (B) shows a second direction.

  The cover member 51 is a member for protecting the head portion 33 a (see FIG. 4) of the drive lever 33 housed in the operation member housing portion 31. If the drive lever 33 is operated carelessly, there is a possibility that the connecting portion between the image forming unit 11 and the drive source may be damaged, so that the drive lever 33 is not exposed when the toner container 18 is removed. It is protected by the cover member 51.

  The cover member 51 has a substantially rectangular parallelepiped shape, and is orthogonal to the first surface 51a, the second surface 51b orthogonal to the first surface 51a, and the first surface 51a and the second surface 51b. And a hollow portion 71 surrounded by the third surface 51 c and the fourth surface 51 d facing each other. The fifth surface 51 e facing the first surface 51 a and the sixth surface 51 f facing the second surface 51 b are open. The corner between the first surface 51 a and the third surface 51 c is cut out in a rectangular shape. The second surface 51 b is L-shaped in plan view due to the notch. In the sixth surface 51f, a mounting portion 72 is formed at a portion corresponding to the notch. A through hole 73 is opened in the mounting portion 72.

  On the first surface 51a, three attachment pieces 75 protruding from an edge on the sixth surface 51f side are formed along the edge at a predetermined interval. Moreover, the connection piece 76 which protrudes from the edge by the side of the 5th surface 51e is formed in the 2nd surface 51b. At the center of the connection piece 76, a rectangular opening 76a as an uneven portion for engaging the cover member 51 and the lock member 52 is opened. Furthermore, a pressing piece 77 that protrudes in the same direction as the connection piece 76 is formed at the corner between the second surface 51 b and the fourth surface 51 d. The tip of the pressing piece 77 has a curved shape. Thus, the three mounting pieces 75, the connection piece 76 and the pressing piece 77 are formed to be orthogonal to each other.

  Next, the lock member 52 will be described with reference to FIGS. 8 and 10. FIG. 10 is a perspective view showing the lock member.

  As shown in FIG. 10, the locking member 52 can not move the intermediate transfer unit 10 to the unit housing 5 by engaging with the engagement recess 45 (see FIG. 6) formed in the unit housing 5. It is a member for locking. The lock member 52 has an L-shape, and has an elongated short arm 82 and a long arm 83 which are pivotably connected to each other about the rotation shaft 81.

  At the tip of the short arm 82, an engagement piece 84 is formed as a concavo-convex portion that is curved and protrudes leftward to engage the cover member 51 and the lock member 52. Furthermore, on the left side surface of the short arm 82, a pressed piece 85 projecting leftward is formed near the center in the longitudinal direction. The projection length of the pressed piece 85 from the left side surface of the short arm 82 is longer than the projection length of the engagement piece 84. Further, on the right side surface of the short arm 82, a cylindrical support portion 86 parallel to the axial direction of the rotating shaft 81 is formed near the center in the longitudinal direction. Further, as shown in FIG. 8A, an opening 87 as a concavo-convex portion that engages with the lock piece 65 is opened at the tip of the long arm 83.

  The pivotal support portion 86 of the lock member 52 is pivotally supported by a support shaft 59 formed in the housing recess 15a of the housing 15, and a torsion coil spring (not shown) so that the short arm 82 rotates in the clockwise direction of FIG. It is energized by As a result, the short arm 82 is pivoted to an inclined posture in which the engagement piece 84 is separated to the right from the first insertion opening 56 and the pressed piece 85 is directly below the first insertion opening 56.

  Further, as shown in FIG. 8A, the tip end portion of the long arm 83 passes through the gap between the upper wall portion 62 and the lower wall portion 63 from the opening 61 formed in the left wall of the housing recess 15a. , And is inserted into an engagement recess 45 formed on the left surface of the unit housing portion 5. That is, the intermediate transfer unit 10 is immovably locked in the unit accommodating portion 5 when the locking member 52 is pivoted to the locking position where it engages with the unit accommodating portion 5. The lock piece 65 has a pair of leg portions 65 b ride on support pieces 46 formed below the engagement recess 45 on both sides of the long arm 83 of the lock member 52. Further, the opening 87 formed at the tip of the long arm 83 is spaced apart to the left from the projecting piece 65 c of the lock piece 65.

  On the other hand, when the short arm 82 is turned in the counterclockwise direction of FIG. 10 until the short arm 82 is in the substantially vertical posture against the biasing force of the torsion coil spring, the engagement piece 84 reaches directly below the first insertion opening 56 . Further, the long arm 83 slides in the right direction, and the tip end separates from the engagement recess 45 of the unit housing portion 5. That is, the lock member 52 is pivoted to the lock release position where the engagement with the unit housing portion 5 is released. Thus, when the lock member 52 is pivoted to the unlocking position, the opening 87 formed at the tip of the long arm 83 moves below the projection 65c.

  In the color printer 1 having the above configuration, attachment and detachment of the cover member 51 of the intermediate transfer unit 10 will be described with reference to FIGS. 5 to 10 and FIGS. 11 to 15. 11 is a perspective view showing the cover member attached, FIG. 12 is a perspective view showing the pressing member at the cover member attached, FIG. 13 is a perspective view showing the state of reattaching the removed cover member, and FIG. FIG. 15 is a perspective view showing the locking operation of the lock piece, and FIG. 16 is a perspective view showing the intermediate transfer unit removed from the unit storage unit.

  When the cover member 51 is attached to the intermediate transfer unit 10, the first direction in which the three attachment pieces 75 face downward and the connection piece 76 and the pressure piece 77 face leftward in the cover member 51 (see FIG. A) (refer to A), and as shown in FIG. 11, the three mounting pieces 75 are inserted into the three mounting holes 55 of the receiving recess 15 a of the housing 15. Furthermore, the connection piece 76 and the pressing piece 77 are respectively inserted into the first opening 38 and the second opening 39 of the operation member housing portion 31. Then, a screw is fastened from the through hole 73 formed in the attachment portion 72 of the cover member 51 to the upper surface of the accommodation recess 15 a. Thus, the head portion 33a of the drive lever 33 enters the hollow portion 71 from the fifth surface 51e of the cover member 51 and is protected from the outside.

  Furthermore, as shown in FIG. 12, when the pressing piece 77 of the cover member 51 is inserted through the second opening 39, the tip of the pressing piece 77 is a protrusion of the pressing member 35 accommodated in the operation member accommodation portion 31. It abuts on the guide surface of the portion 35d. When the pressing piece 77 is further inserted into the second opening 39, the protrusion 35d is pushed forward by the pressing piece 77, and the pressing member 35 is rotated about the support shaft 40 in the counterclockwise direction of FIG. Thus, the open / close switch 34 is displaced to a position where it can be pressed.

  When the pressing member 35 is displaced in this manner, when the upper surface cover 3 is rotated to close the upper surface opening 2a, the actuator pin 21 enters the operation member accommodation portion 31 from the opening 36 and the pressed portion 35a of the pressing member 35 Press down. Thereby, the pressing portion 35 b pushes in the switch portion 34 b of the open / close switch 34, and the open / close switch 34 detects that the top cover 3 is closed.

  When removing the cover member 51, the fastening of the screw is released and the cover member 51 is removed from the housing 15. As a result, the pressing member 35 is biased by the spring 43 to displace the open / close switch 34 into an unpressable position.

  Then, the removed cover member 51 is supported in a second direction (see FIG. 9B) in which the three attachment pieces 75 face right and the connection piece 76 and the pressing piece 77 face downward. As shown in FIG. 13, the connection piece 76 is inserted into the first insertion opening 56, and the pressing piece 77 is inserted into the second insertion opening 57. As shown in FIG. 14A, when the connection piece 76 is inserted into the first insertion opening 56, the tip of the connection piece 76 presses the pressed piece 85 of the lock member 52 downward. Then, as shown in FIG. 14 (B), the short arm 82 rotates in the counterclockwise direction of FIG. 14 (B) around the pivot 59. Then, the engagement piece 84 of the short arm 82 engages with the opening 76 a of the connection piece 76 of the cover member 51. Thus, the cover member 51 is prevented from coming off the intermediate transfer unit 10.

  Further, the long arm 83 moves rightward while rotating about the rotation shaft 81. As a result, the leading end of the long arm 83 is separated from the engagement recess 45 of the unit housing 5, and the engagement between the intermediate transfer unit 10 and the unit housing 5 is released. Furthermore, when the long arm 83 moves in the right direction, the opening 87 reaches immediately below the projection 65 c of the lock piece 65.

  As described above, after the engagement with the unit accommodating portion 5 is released and the cover member 51 is prevented from coming off the intermediate transfer unit 10, the intermediate transfer unit 10 is pulled out from the unit accommodating portion 5. Then, the lock piece 65 riding on the support piece 46 of the unit housing portion 5 falls in the vertical direction by its own weight. Then, as shown in FIG. 14C and FIG. 15, the projecting piece 65c of the lock piece 65 engages with the opening 87 of the long arm 83, and the movement of the long arm 83 is restricted. Thus, the rotation of the lock member 52 is restricted, and the engagement between the lock member 52 and the cover member 51 is maintained.

  As a result, as shown in FIG. 16, the intermediate transfer unit 10 is pulled out of the unit accommodating portion 5 in a state where the removed cover member 51 is mounted.

  As described above, according to the color printer 1 of the present invention, in order to remove the intermediate transfer unit 10, after removing the cover member 51, it is necessary to mount the removed cover member 51 on the intermediate transfer unit 10. Therefore, loss of the removed cover member 51 can be prevented. Further, by mounting the cover member 51 after the intermediate transfer unit 10 is mounted in the unit housing portion 5, the pressing member 35 is displaced to a posture in which the open / close switch 34 can be pressed. That is, unless the cover member 51 is attached after the intermediate transfer unit 10 is attached to the unit accommodating portion 5, it is not detected that the upper surface opening 3a is closed by the upper surface cover 3, so the color printer 1 can not operate. . Therefore, it is possible to prevent the attachment of the cover member 51 from being forgotten. The open / close switch 34 may be a switch that detects the open / close state of an open / close member other than the top cover 3.

  Further, when the removed cover member 51 is attached to the intermediate transfer unit 10, the cover member 51 and the lock member 52 engage with each other, so that the cover member 51 can be prevented from being separated from the intermediate transfer unit 10. Further, when the intermediate transfer unit 10 is removed from the unit housing portion 5, the rotation of the lock member 52 is restricted, so that the engagement between the lock member 52 and the cover member 51 is maintained. In this manner, the cover member 51 can be reliably prevented from being lost and worn.

  Furthermore, by making the three attachment pieces 75 provided on the cover member 51 and the attachment holes 55 into which the attachment pieces 75 are inserted different in each specification of the intermediate transfer unit 10, the destination is different, etc. The intermediate transfer unit 10 having different specifications can be prevented from being attached.

  Furthermore, since the above description of the embodiment of the present invention describes a preferred embodiment of the image forming apparatus according to the present invention, there may be various technically preferable limitations. The technical scope of the present invention is not limited to these embodiments unless specifically described to limit the present invention. That is, the components in the embodiment of the present invention described above can be appropriately replaced with existing components and the like, and various variations are possible including combinations with other existing components, The description of the embodiments of the present invention described above does not limit the contents of the invention described in the claims.

1 Color printer (image forming device)
2 Device body 2a upper surface opening (opening)
3 Top cover (opening and closing member)
10 Intermediate transfer unit (imaging unit)
34 open / close switch 35 pressing member 51 cover member 52 locking member 65 lock piece 65 c projecting piece (concave / convex portion)
76 connection piece (connection part)
76a opening (concave and convex part)
84 Engagement piece (concave and convex part)
87 Opening (concave and convex part)

Claims (4)

An image forming apparatus comprising an image forming unit that is attachable to and detachable from a predetermined position of an apparatus main body, comprising:
The device body is
A switch member that detects an open / close state of an opening / closing member that opens / closes an opening formed in the device main body by being pressed and released;
And a pressing member provided to displace the switch member between a pressing position and a pressing position.
The imaging unit includes a cover member that is detachable.
The cover member is configured to displace the pressing member from the unpressable posture to the depressible posture when mounted on the imaging unit mounted at the predetermined position of the apparatus main body. An image forming apparatus characterized in that The device main body includes an operation member storage unit for storing the switch member and the pressing member,
The operation member storage portion has an opening,
The cover member has a pressing piece that contacts and presses the pressing member through the opening when mounted on the imaging unit mounted at the predetermined position of the apparatus main body.
The image forming apparatus according to claim 1, wherein the pressing member is displaced from the unpressable posture to the depressible posture by being pressed by the pressing piece. The apparatus main body further includes a drive lever which is connected and disconnected between the imaging unit and the drive source by sliding.
The drive lever has a manually operated head portion,
When the cover member is mounted on the imaging unit mounted at the predetermined position of the apparatus main body, the cover member covers the head portion and protects the head portion from the outside. The image forming apparatus according to 2.   The imaging unit and the cover member are respectively formed with a mounting hole and a mounting piece which are engaged when the cover member is mounted on the imaging unit, and the mounting hole and the mounting piece are formed. The image forming apparatus according to any one of claims 1 to 3, wherein the image forming apparatus has a non-compatible shape having a different shape for each specification of the image forming unit.

Images