JP6166696B2 - Image forming apparatus - Google Patents

Description

  The present invention relates to an image forming apparatus including a conductive wire that electrically connects an electromagnetic clutch and a substrate.

  In general, an image forming apparatus main body contains an electromagnetic clutch that switches between transmission and interruption of a driving force between a motor and a driven member. Examples of the driven member include a paper transport roller and a photosensitive drum. The electromagnetic clutch has a bearing portion that rotatably supports an input shaft connected to a motor and an output shaft connected to a driven member. The input shaft is connected to the armature, and the output shaft is connected to a rotor disposed facing the armature. The armature and the rotor are configured to be switchable between an attracted state attracted to each other by the exciting coil and an interrupted state in which the attracting is blocked. The electromagnetic clutch is provided with a connection terminal for connecting the exciting coil to an external conductive wire. The connection terminal is connected to the substrate via a conductive wire.

JP 2007-147030 A

  Here, if the conductive wire connecting the connection terminal of the electromagnetic clutch and the substrate is stretched, the tension of the conductive wire acts on the electromagnetic clutch, causing misalignment or inclination of the electromagnetic clutch components. End up. As a result, there is a problem that the bearing portion of the electromagnetic clutch is unevenly worn and the life of the electromagnetic clutch is shortened.

  In order to avoid this problem, it is conceivable that in the assembly process of the image forming apparatus, the assembly operator adjusts the tension of the conductive wire to give the conductive wire some slack. However, this method has a problem that the degree of looseness of the conductive wire varies depending on the skill level of the assembly operator because the degree of looseness of the conductive wire depends on the experience and intuition of the operator. In particular, when the electromagnetic clutch is disposed deep in the image forming apparatus main body, it is difficult for an assembly operator to visually confirm the loosening material of the conductive wire, and this problem becomes remarkable.

  The present invention has been made in view of the above points, and an object of the present invention is to relax a conductive wire by a predetermined amount between an electromagnetic clutch and a substrate without being affected by the skill level of an assembly operator. Another object is to provide an image forming apparatus that can be wired.

  An image forming apparatus according to the present invention includes an image forming apparatus main body in which an image forming unit is accommodated, an electromagnetic clutch assembled in the image forming apparatus main body, a substrate for controlling the electromagnetic clutch, and the electromagnetic Conductive wires that electrically connect the clutch and the substrate, and predetermined components that are assembled to the image forming apparatus main body.

  And when wiring the said conductive wire between the said electromagnetic clutch and the said board | substrate, the axis | shaft part for hanging and temporarily holding | maintaining the said conductive wire and the said predetermined component are said When the image forming apparatus main body is set at a normal position, the shaft portion is moved to one side in the axial direction so that the conductive wire drops from the shaft portion in conjunction with the setting operation of the predetermined component. A shaft retracting mechanism for retracting is provided.

  According to this configuration, when an operator wires a conductive wire between the electromagnetic clutch and the substrate in the assembly process of the image forming apparatus, first, the conductive wire is stretched around the shaft portion and temporarily held. Let me. When the operator sets a predetermined component at a normal position with respect to the main body of the image forming apparatus, the shaft portion is retracted to one side in the axial direction by the shaft portion retracting mechanism in conjunction with the setting operation, and the conductive wire Falls off the shaft. Thus, when the assembly of the image forming apparatus is completed, the conductive wire connecting the substrate and the electromagnetic clutch can always have a predetermined degree of slack. Therefore, it is possible to prevent the conductive wire from being connected to the substrate and the electromagnetic clutch, and to prevent the components of the electromagnetic clutch from being misaligned or inclined due to the tension of the conductive wire. it can. Even if the operator cannot visually confirm the loosening material of the conductive wire in the wiring work of this conductive wire, if only paying attention that the conductive wire is stretched around the shaft portion, it is possible to move to the normal position of the predetermined part. As a result of the completion of the assembly, it is possible to reliably impart a predetermined or more slack to the conductive wire. Therefore, the wiring work of the conductive wire can be reliably performed regardless of the experience and intuition of the operator.

  The shaft portion retracting mechanism moves the shaft portion in the axial direction so that the shaft portion returns to a position where the conductive wire can be temporarily held when the predetermined component is moved from the normal position to the non-normal position. It is preferable to further include a biasing member that biases the other side.

  According to this configuration, when the user needs to rewire the conductive wire after shipping the image forming apparatus to the market, the shaft portion is attached when a predetermined component is moved from the normal position to the non-normal position. It moves to the other side in the axial direction by the urging force of the urging member and returns to a position where the conductive wire can be held. Therefore, the user can loosen the conductive wire between the electromagnetic clutch and the substrate by using the shaft portion based on the wiring procedure described above. Therefore, the wiring work of the conductive wires after the shipment of the image forming apparatus can be reliably performed without depending on the user's experience and intuition.

  The predetermined component is pivotally supported with respect to the image forming apparatus main body so as to be movable between the regular position and the non-regular position. The shaft portion is inserted and moved in the axial direction, and is configured to be rotatable together with the predetermined component, and the bearing portion is formed in the bearing portion and inclined in the circumferential direction. A surface, a pressing portion that is formed at one end portion in the axial direction of the shaft portion, and is pressed by the bearing portion when the bearing portion moves to one side in the axial direction, and the predetermined component When rotating from the non-regular position and set at the regular position, the bearing portion is brought into contact with the inclined surface of the bearing portion that rotates together with the predetermined component, and the bearing portion is moved in the axial direction together with the shaft portion. And a fixing member that is pushed and retracted to one side. Arbitrariness.

  According to this configuration, the predetermined component is pivotally supported so as to be rotatable with respect to the image forming apparatus main body. Examples of the predetermined component include a topper cover that is opened and closed when maintenance is performed in the main body of the image forming apparatus. When the predetermined component is rotated from the non-regular position to the regular position, the inclined surface of the bearing portion, which is a part of the shaft portion retracting mechanism, comes into contact with the fixed member, and the bearing portion is in the axial direction together with the shaft portion. Evacuate to the side. As described above, the cost of the entire apparatus can be reduced by operating the shaft retraction mechanism using the existing components such as the top cover that is pivotally supported by the image forming apparatus main body.

  According to the present invention, there is provided an image forming apparatus capable of loosening a conductive wire by a predetermined amount between an electromagnetic clutch and a substrate without depending on the skill level of an assembly worker.

FIG. 1 is a schematic longitudinal sectional view showing a laser printer as an image forming apparatus in the embodiment. FIG. 2 is a perspective view showing a state where the top cover is in an open position (non-regular position). FIG. 3 is an exploded perspective view showing the shaft retraction mechanism. FIG. 4 is an explanatory diagram for explaining the retraction operation of the shaft retraction mechanism. FIG. 5 is a perspective view illustrating a state in which the conductive wire is dropped from the shaft portion by rotating the top cover from the open position (non-regular position) to the closed position (normal position), and the wiring of the conductive wire is completed. . FIG. 6 is a view corresponding to FIG. 6 is a side view illustrating an image forming apparatus according to Embodiment 2. FIG. FIG. 8 is a cross-sectional view taken along the line VIII-VIII in FIG. 7, illustrating a state before the side cover 70 is mounted at a normal position (a state at an irregular position). FIG. 8 is a cross-sectional view taken along line VIII-VIII in FIG. 7, illustrating a state in which the side cover 70 is mounted at a normal position.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The present invention is not limited to the following embodiment.

Embodiment 1
FIG. 1 is a cross-sectional view showing a schematic configuration of a laser printer 1 as an image forming apparatus in the present embodiment.

  As shown in FIG. 1, the laser printer 1 includes a box-shaped housing (corresponding to the image forming apparatus main body) 2, a manual paper feeding unit 6, a cassette paper feeding unit 7, an image forming unit 8, and a fixing unit. 9 and a paper discharge unit 10. Thus, the laser printer 1 is configured to form an image on a sheet based on image data transmitted from a terminal (not shown) while conveying the sheet along the conveyance path L in the housing 2. ing. In the following description, unless otherwise specified, the front side and the rear side mean the front side and the rear side of the laser printer 1, respectively (the front side and the back side in the direction perpendicular to the paper surface of FIG. 1), and the left side and the right side are laser It means the left side and the right side (left side and right side in FIG. 1) of the printer 1.

  The housing 2 includes a housing main body 40 having an open portion on the upper surface, and a top cover 41 (see FIG. 2) that closes the open portion of the housing main body 40 so as to be opened and closed. The top cover 41 corresponds to a predetermined component that is assembled to the housing 2 as the main body of the image forming apparatus. By opening the top cover 41, it is possible to remove a paper jam in the housing main body 40 or to perform maintenance of devices. As shown in FIG. 2, the top cover 41 has an upper surface portion 42 including the paper discharge tray 3, and side surface portions 43 and 44 connected to both ends of the upper surface portion 42 in the front-rear direction. An arch-shaped guide portion 45 is connected to the right end portion of one side surface portion 43. One end of the guide portion 45 in the circumferential direction is connected to an extending portion 46 extending toward the center of curvature in the radial direction. A support pin 47 passes through the distal end portion of the extending portion 46. The support pin 47 is erected on the rear side wall of the housing main body 40, and the top cover 41 is rotated up and down around the support pin 47 together with the arch portion 45 and the extension portion 46, so that the normal position is reached. It can move between non-regular positions. In the present embodiment, the normal position is a position where the top cover 41 fully closes the opening portion of the housing main body 40, and the non-regular position is the top cover 41 that opens the opening portion of the housing main body 40. It is a position to do. The position of the top cover 41 is detected by a position detection sensor. When the position detection sensor detects that the top cover 41 is in the normal position, an image forming operation by the laser printer 1 can be performed. On the other hand, when the position detection sensor detects that the top cover 41 is in the irregular position, execution of the image forming operation is prohibited.

  Returning to FIG. 1, the manual paper feed unit 6 includes a manual feed tray 4 that can be opened and closed on one side of the housing 2, and a manual paper feed that is rotatably provided inside the housing 2. And a roller 5.

  The cassette paper feeding unit 7 is provided at the bottom of the housing 2. The cassette paper feeding unit 7 separates the paper fed one by one, a paper feeding cassette 11 that stores a plurality of papers stacked on each other, a pick roller 12 that takes out the paper in the paper feeding cassette 11 one by one, and A feed roller 13 and a retard roller 14 that are fed to the conveyance path L.

  The image forming unit 8 is provided above the cassette paper feeding unit 7 in the print main body 2. The image forming unit 8 includes a photosensitive drum 16 that is an image carrier rotatably provided in the housing 2, a charger 17 disposed around the photosensitive drum 16, a developing unit 18, a transfer roller 19, and a transfer roller 19. A cleaning unit 20, a laser scanner unit (LSU) 30 that is an optical scanning device disposed above the photosensitive drum 16, and a toner hopper 21 are provided. Thus, the image forming unit 8 forms an image on the sheet supplied from the manual sheet feeding unit 6 or the cassette sheet feeding unit 7.

  The transport path L is provided with a pair of registration rollers 15 that supply the fed sheet to the image forming unit 8 at a predetermined timing after temporarily waiting.

  The fixing unit 9 is disposed on the side of the image forming unit 8. The fixing unit 9 includes a fixing roller 22 and a pressure roller 23 that are pressed against each other and rotate. Thus, the fixing unit 9 is configured to fix the toner image transferred to the sheet by the image forming unit 8 on the sheet.

  The paper discharge unit 10 is provided above the fixing unit 9. The paper discharge unit 10 includes a paper discharge tray 3, a pair of paper discharge rollers 24 for conveying paper to the paper discharge tray 3, and a plurality of conveyance guide ribs 25 that guide the paper to the paper discharge roller pair 24. Yes.

  When the laser printer 1 receives the image data, the photosensitive drum 16 is rotationally driven in the image forming unit 8, and the charger 17 charges the surface of the photosensitive drum 16.

  Based on the image data, laser light is emitted from the laser scanner unit 30 to the photosensitive drum 16. An electrostatic latent image is formed on the surface of the photosensitive drum 16 by irradiation with laser light. The electrostatic latent image formed on the photosensitive drum 16 is developed by the developing unit 18 to become a visible image as a toner image.

  Thereafter, the sheet is pressed against the surface of the photosensitive drum 16 by the transfer roller 19. As a result, the toner image on the photosensitive drum 16 is transferred to the paper. The sheet on which the toner image is transferred is heated and pressed by the fixing roller 23 and the pressure roller 22 in the fixing unit 9. As a result, the toner image is fixed on the paper.

  The rotating bodies such as the rollers 12 to 15 and the photosensitive drum 16 are driven by one motor (not shown). An electromagnetic clutch 31 for switching transmission / disconnection of the driving force from the motor is connected to each rotating body. In FIG. 1, only the electromagnetic clutch 31 connected to the pick roller 12 among the plurality of electromagnetic clutches 31 is shown. The electromagnetic clutch 31 has a bearing portion that rotatably supports an input shaft connected to the motor and an output shaft connected to the pick roller 12. The input shaft is connected to the armature, and the output shaft is connected to a rotor disposed facing the armature. The armature and the rotor are configured to be switchable between an attracted state attracted to each other by the exciting coil and an interrupted state in which the attracting is blocked. A connection terminal 32 (see FIG. 2) for connecting the exciting coil to an external conductive wire 33 is provided on the end face of the electromagnetic clutch 31. The conductive wire 33 electrically connects the connection terminal 32 of the electromagnetic clutch 31 and the control board 34 that controls the operation of the electromagnetic clutch 31 to each other. The control board 34 is attached to the front side wall of the laser printer 1, for example.

  A shaft member 61 is provided in the vicinity of the front side wall in the laser printer 1. The shaft member 61 has a shaft portion 61a for temporarily holding (temporarily holding) the conductive wire 33 when the conductive wire 33 is wired. The axial direction of the shaft portion 61 a coincides with the front-rear direction of the laser printer 1. The shaft portion 61 a is disposed between the electromagnetic clutch 31 and the control board 34 and above the electromagnetic clutch 31 and the control board 34 when viewed from the axial direction. A disc portion 61b (see FIG. 3) coaxial with the shaft portion 61a is formed at one end portion in the axial direction of the shaft portion 61a. The diameter of the disc part 61b is larger than the diameter of the shaft part 61a. When the top cover 41 is rotated from the non-regular position to the normal position, the shaft portion 61a is retracted (moved) to one side in the axial direction in conjunction with the rotation operation.

  As shown in FIG. 3, the shaft retraction mechanism 60 that retreats the shaft 61 a has a movable member 62 and a fixed member 63. The movable member 62 has a cylindrical bearing portion 62a through which the shaft portion 61a is inserted, and an operation lever portion 62b extending radially outward from the outer peripheral surface of the bearing portion 62a. The bearing portion 62a supports the shaft portion 61a so as to be movable in the axial direction. An inclined surface 62c that is inclined in the circumferential direction is formed in a portion of the outer peripheral surface of the bearing portion 62a that is closer to the other side in the axial direction.

  The operation lever portion 62b is formed in a rectangular plate shape, and is connected to one end portion in the axial direction on the outer peripheral surface of the bearing portion 62a. The connecting pin 48 is fixed perpendicularly to the operation lever portion 62b at the tip end portion (the end portion opposite to the bearing portion 62a side) of the operation lever portion 62b. The connecting pin 48 penetrates the through hole 50 formed in the side surface portion 44 of the top cover 41 so as to be movable in the axial direction.

  The fixing member 63 has an arch-shaped fixing main body 63a. The fixed main body 63a holds the bearing 62a so as to be movable in the circumferential direction and the axial direction. L-shaped bent pieces 63b are connected to both ends in the circumferential direction of the fixed main body 63a. One bent piece 63b is in contact with the inclined surface 62c of the shaft portion 61a (see FIG. 4).

  Next, the operation of the shaft retraction mechanism 60 will be described with reference to FIG. The figure on the left side of FIG. 4 shows a state in which the top cover 41 is in an irregular position (open position). In this state, the operation lever portion 62b of the movable member 62 extends in the vertical direction with the bearing portion 62a as a fulcrum. Since the top cover 41 is connected to the operation lever portion 62b via the connecting pin 48, when the top cover 41 is rotated from the non-regular position to the normal position (closed position), the operation lever portion 62b is moved together with the bearing portion 62a. It rotates counterclockwise in the figure. If it does so, the pressing force which goes to the one side of an axial direction will act from the contact part 63b of the fixing member 63 with respect to the inclined surface 62c of the bearing part 62a, and the bearing part 62a will move to the one side of an axial direction. As a result, the end surface on one side in the axial direction of the bearing portion 62 a comes into contact with the disc portion 61 b of the shaft member 61. And the disc part 61b is pressed by the bearing part 62a, and moves to the one side of an axial direction with the axial part 61a. Thus, the retracting operation of the shaft portion 61a is completed.

  Next, with reference to FIG. 2 and FIG. 5, a wiring procedure of the conductive wire 33 during the assembly process of the laser printer 1 will be described. When wiring the conductive wire 33, it is necessary for an operator to put a hand into the laser printer 1 and work, so the top cover 41 is held in the open position (non-regular position). In this state, a conductive wire 33 is wired between the connection terminal 32 of the electromagnetic clutch 31 and the control board 34. At this time, the intermediate portion of the conductive wire 33 is wound around the shaft portion 61a as shown in FIG. 2 and temporarily held (temporarily held). Thereafter, when the top cover 41 is rotated from the open position (non-regular position) and set to the closed position (normal position), the shaft portion 61a is moved to one side in the axial direction in conjunction with the rotation operation of the top cover 41. evacuate. As a result, the conductive wire 33 temporarily held by the shaft portion 61a falls off from the shaft portion 61a, and a predetermined slack is formed in the conductive wire 33 as shown in FIG.

  Thereby, when the assembly of the laser printer 1 is completed, the conductive wire 33 connecting the control board 34 and the electromagnetic clutch 31 can be surely slackened more than a predetermined amount. Accordingly, it is possible to prevent the conductive wire 33 from being connected to the control board 34 and the electromagnetic clutch 31, and further, the component of the electromagnetic clutch 31 is misaligned or inclined due to the tension of the conductive wire 33. Can be prevented. Even when the operator cannot visually confirm the loosening tool material of the conductive wire 33 (for example, when the electromagnetic clutch 31 is disposed in a deep portion in the housing 2), the conductive wire 33 is stretched on the shaft portion 61a. If attention is paid only to hanging around in the state, it is possible to reliably give a predetermined or more slack to the conductive wire 33 as the assembly of the top cover 41 to the normal position is completed. Therefore, a predetermined slack can be reliably imparted to the conductive wire 33 regardless of the experience and intuition of the operator.

  In the above embodiment, the top cover 41 is rotated from the non-regular position to the regular position, so that the inclined surface 62c of the bearing portion 62a contacts the bent piece 63b of the fixing member 63, and the bearing portion 62a becomes the shaft portion 61a. At the same time, it is retracted to one side in the axial direction. Therefore, since the shaft retraction mechanism 60 can be operated using the top cover 41 which is an existing component, the cost of the entire apparatus can be reduced.

<Modification>
FIG. 6 shows a modification of the first embodiment. This modification differs from the first embodiment in that the shaft retraction mechanism 60 has a compression coil spring 49 as a biasing member that biases the shaft 61a to the other side in the axial direction.

  One end of the compression coil spring 49 in the axial direction is fixed to the housing 2, and the other end is fixed to the shaft member 61. The compression coil spring 49 attaches the shaft member 61 to the other side in the axial direction so that the shaft portion 61a returns to a position where the conductive wire 33 can be temporarily held when the top cover 41 is moved from the normal position to the non-normal position. It is fast.

  According to this configuration, when the user needs to rewire the conductive wire 33 after shipping the laser printer 1 to the market, if the top cover 41 is moved from the normal position to the non-normal position, the shaft portion 61a ( The shaft member 61) moves to the other side in the axial direction by the urging force of the compression coil spring 49 and returns to a position where the conductive wire 33 can be held. Therefore, the user can loosen and wire the conductive wire 33 between the electromagnetic clutch 31 and the control board 34 using the shaft portion 61a based on the same wiring procedure as described in the first embodiment. . Therefore, the wiring work of the conductive wire 33 after the shipment of the laser printer 1 can be reliably performed without depending on the user's experience and intuition.

<< Embodiment 2 >>
FIG. 7 shows the second embodiment. In the second embodiment, the configuration of the shaft retraction mechanism 60 is different from that of the first embodiment. In the following description, the same components as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  That is, unlike the first embodiment, the shaft retraction mechanism 60 according to the second embodiment operates in conjunction with the mounting operation (set operation) of the side cover 70 of the laser printer 1. The side cover 70 is made of a sheet metal plate material and covers a part of the front side wall of the housing 2 in a detachable manner. In the present embodiment, the side cover 70 corresponds to a predetermined component.

  As shown in FIG. 8A, the shaft retraction mechanism 60 has a first shaft portion 61a and a second shaft portion 61d. The first shaft portion 61 a is provided for temporarily holding the conductive wire 33 around the conductive wire 33 during wiring. The second shaft portion 61d is disposed in parallel with the first shaft portion 61a with a space therebetween. The second shaft portion 61d is longer in the axial direction than the first shaft portion 61a. One side end portions in the axial direction of both shaft portions 61 a and 61 d are connected to a rectangular vertical plate 65. Thus, both shaft portions 61 a and 61 d are connected via a vertical plate 65. The vertical plate 65 is supported by a guide rail (not shown) so as to be slidable in the front-rear direction. A compression coil spring 66 as an urging member is connected to the rear side surface of the vertical plate 65. The compression coil spring 66 biases the vertical plate 65 to the other side in the axial direction.

  Next, the wiring procedure of the conductive wire 33 in the laser printer 1 of the second embodiment will be described with reference to FIGS. 8A and 8B. FIG. 8A shows a state before the side cover 70 is attached (set) to the housing 2, that is, a state in which the side cover 70 is in an irregular position. In this state, the user puts his hand through the opening 2 a of the housing 2 and connects the conductive wire 33 to the connection terminal 32 of the electromagnetic clutch 31 and the control board 34. At this time, the conductive wire 33 is temporarily held by being wound around the shaft portion 61a. Thereafter, when the side cover 70 is attached to the housing 2 (when set to the normal position), the second shaft portion 61a is pressed toward one side in the axial direction by the side cover 70 as shown in FIG. 8B. As a result, the first shaft portion 61a moves to one side in the axial direction against the urging force of the compression coil spring 66 together with the second shaft portion 61a. As a result, the conductive wire 33 hung around the shaft portion 61a falls off from the shaft portion 61a. Therefore, it is possible to prevent the conductive wire 33 from being connected to the control board 34 and the electromagnetic clutch 31, and further, the component of the electromagnetic clutch 31 is misaligned or inclined due to the tension of the conductive wire 33. Can be prevented. Moreover, the wiring work of the conductive wire 33 can be performed reliably regardless of the experience and intuition of the operator.

  Moreover, in the said embodiment, since the axial part retraction | saving mechanism 60 is operated using the mounting | wearing operation | movement of the side cover 70 which is an existing component, the cost of the whole apparatus can be reduced. In addition, the configuration of the shaft retraction mechanism 60 can be simplified as compared with the case where the shaft retraction mechanism 60 is operated in conjunction with the rotation of the top cover 41 as in the above embodiment.

  As described above, the present invention is useful for an image forming apparatus including a conductive wire that electrically connects an electromagnetic clutch and a substrate.

1 Laser printer (image forming device)
2 Housing (Image forming device main unit)
8 Image forming unit 31 Electromagnetic clutch 33 Conductive wire 34 Control board (board)
41 Top cover (predetermined components)
49 Compression coil spring (biasing member)
60 Shaft part retracting mechanism 61a Shaft part 61b Disk part (pressing part)
62a Bearing part 62c Inclined surface 63 Fixed member 63b Bending piece (contact part)
70 Side cover (predetermined components)

Claims (3)

An image forming apparatus main body in which an image forming unit is accommodated, an electromagnetic clutch assembled in the image forming apparatus main body, a substrate for controlling the electromagnetic clutch, and the electromagnetic clutch and the substrate are electrically connected An image forming apparatus comprising: a conductive wire to be connected; and predetermined constituent parts assembled to the image forming apparatus main body.
When wiring the conductive wire between the electromagnetic clutch and the substrate, a shaft portion for hanging and temporarily holding the conductive wire in a stretched state;
When the predetermined component is set at a normal position with respect to the image forming apparatus main body, the shaft portion is arranged so that the conductive wire drops from the shaft portion in conjunction with the setting operation of the predetermined component. An image forming apparatus comprising a shaft retraction mechanism that retreats the image to one side in the axial direction. The image forming apparatus according to claim 1.
The shaft retraction mechanism is
When the predetermined component is moved from the normal position to a non-normal position different from the normal position, the shaft part is moved in the axial direction so that the shaft part returns to a position where the conductive wire can be temporarily held. An image forming apparatus, further comprising a biasing member that biases to the other side. The image forming apparatus according to claim 1 or 2,
The predetermined component is configured to be movable between the normal position and the non-normal position by being pivotally supported with respect to the image forming apparatus main body.
The shaft retraction mechanism is
A bearing portion that is inserted in the shaft portion and is movable in the axial direction and configured to be rotatable together with the predetermined component;
An inclined surface formed in the bearing portion and inclined in the circumferential direction;
A pressing portion that is formed at one end portion in the axial direction of the shaft portion and is pressed by the bearing portion when the bearing portion moves to one side in the axial direction;
When the predetermined component rotates from the non-regular position and is set at the normal position, the predetermined component contacts the inclined surface of the bearing that rotates together with the predetermined component, and the shaft is moved to the shaft. And a fixing member that is pressed to the one side in the axial direction together with the portion to be retracted.

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