JP2020195029A - Image reading device and image formation device - Google Patents

Abstract

To reduce an operation load by simplifying operation.SOLUTION: An image reading device 2 comprises: an image reading unit 31 which reads an image by moving; and a switch member 50 which can be switched between a first position entering a moving path H of the image reading unit 31 and a second position saved from the moving path H of the image reading unit 31. The switch member 50 can be switched from the first position to the second position by contact with the image reading unit 31 when the image reading unit 31 moves.SELECTED DRAWING: Figure 5

Description

The present invention relates to an image reader and an image forming apparatus.

As an image reading device mounted on an image forming device such as a copier or a printer, a unit provided with an image reading means such as an image sensor is moved along a document placed on a document reading table. Known are configured to read an image of a manuscript.

In this type of image reading device, if the units or members that make up the device move or displace due to vibrations that occur during transportation, it may cause damage to the device or other problems. Those equipped with means for regulating displacement have been proposed.

For example, Patent Document 1 below proposes an image reading device including a locking mechanism that mechanically stops the movement of the reading head. This image reader is provided with a lock lever for operating the lock mechanism from the outside, and the user or operator manually operates the lock lever before the power of the image reader is turned on to read the image. The movement restraint state of the head can be released.

However, the configuration that requires a manual release operation before the power of the image reading device is turned on as described above has a problem that the operation becomes complicated and the operation load increases.

In order to solve the above problems, the present invention has an image reading unit that reads an image by moving, a first position that has entered the moving path of the image reading unit, and a second position that has been evacuated from the moving path of the image reading unit. The switching member is provided with a switching member that can be switched between the two positions, and the switching member is switched from the first position to the second position by coming into contact with the image reading unit when the image reading unit is moved. It is characterized by that.

According to the present invention, the operation becomes simple and the operation load can be reduced.

It is a figure which shows one Embodiment of the image forming apparatus provided with an image reading apparatus. It is sectional drawing of the optical scanning unit included in an image reader. It is a perspective view of an image reader. It is a perspective view of the image reader in a state where a cover part is removed. It is a top view of the image reading device with the cover part removed. FIG. 5 is a cross-sectional view taken along the line AA in FIG. FIG. 5 is a cross-sectional view taken along the line BB in FIG. It is a perspective view which shows the switching member and its peripheral structure. It is a top view which shows the example which arranged the tip end side of the switching member over the whole width direction of a cable. It is sectional drawing for demonstrating the arrangement of a switching member. It is a top view which shows the state which the optical scanning unit is in contact with a switching member. It is a top view which shows the example which provided the elastic member in the cable holding part. It is a flowchart for demonstrating the movement of the switching member at the time of performing an image reading operation.

Hereinafter, the present invention will be described with reference to the accompanying drawings. In each drawing for explaining the present invention, components such as members and components having the same function or shape will be described once by giving the same reference numerals as much as possible. Omit.

FIG. 1 is a diagram showing an embodiment of an image forming apparatus including an image reading apparatus.

As shown in FIG. 1, the image forming apparatus 100 includes a document transporting apparatus 1, an image reading apparatus 2, an image forming unit 3, and a paper feeding unit 4. In the present embodiment, an electrophotographic color laser printer will be described as an example, but the image forming method may be another method such as an inkjet method. Further, the image forming apparatus according to the present invention may be a monochrome image forming apparatus, a printer, a copying machine, a facsimile, or a multifunction device having any two or three functions thereof. May be good.

The document transporting device 1 includes a document tray 25 on which a document is placed, a document transporting unit 26 that separates documents one by one from the document tray 25 and transports them toward the contact glass 32 of the image reading device 2, and an image reading device. It is provided with an ejection tray 27 from which a document whose image has been read by 2 is ejected.

The image reading device 2 includes an optical scanning unit 31 as an image reading unit that reads an image of a document. As shown in FIG. 2, the optical scanning unit 31 includes a light source 33 that irradiates the document D on the contact glass 32 with light, and a CCD (charge coupling element) 34 as an image reading means that reads an image from the reflected light of the document D. A substrate 35 provided with the CCD 34, a plurality of mirrors 36A to 36E that sequentially reflect the reflected light from the document D and guide the reflected light to the CCD 34, an imaging lens 37 for forming the reflected light, and a light source 33, the CCD 34. It includes a substrate 35, a plurality of mirrors 36A to 36E, and a carriage case 38 as a movable housing that integrally holds an imaging lens 37. As the image reading means, another image sensor such as a close contact type image sensor (CIS) may be used instead of the CCD 34.

The image reading device 2 is configured to be executable by switching between a conveyed document scanning mode and a mounted document scanning mode. The conveyed document scanning mode is a mode for scanning the image of the conveyed document conveyed on the contact glass 32 of the image reading device 2 by the document conveying device 1. On the other hand, the placed document reading mode is a mode for reading an image of a still document placed on the contact glass 32.

When scanning an image in the conveyed document scanning mode, the optical scanning unit 31 is arranged at a predetermined scanning position shown in FIG. 1, and the optical scanning unit 31 when the document conveyed by the document conveying device 1 passes through the scanning position. The image of the original is read by. On the other hand, when the image is read in the mounted document scanning mode, the document is placed on the contact glass 32 and the optical scanning unit 31 reciprocates in the sub-scanning direction X shown in FIG. The image of the original on the contact glass 32 is read. The "sub-scanning direction" is the direction in which the document is conveyed by the document transfer device 1 on the document reading surface parallel to the contact glass 32. Further, on the document reading surface, a direction orthogonal to the sub-scanning direction (Y direction shown in FIG. 1) is referred to as a "main scanning direction".

As shown in FIG. 1, the paper feed unit 4 is provided with a plurality of paper feed cassettes 5. Each paper cassette 5 contains paper as a recording medium. Further, in the paper feed unit 4, a paper feed roller 6 that feeds the paper from each paper cassette 5, a separation roller 8 that separates the fed paper and supplies the paper to the paper feed path 7, and a paper feed path 7 A transport roller 9 for transport is provided.

As shown in FIG. 1, the image forming unit 3 includes four image forming units 10K, 10Y, 10M, 10C, an optical writing device 11, a transfer device 12, a timing roller pair 13, and a fixing device 14. , A paper ejection roller pair 15 is provided.

The four image forming units 10K, 10Y, 10M, and 10C have the same configuration except that they contain developeres of different colors of black, yellow, magenta, and cyan corresponding to the color separation components of the color image. .. Specifically, each image forming unit 10K, 10Y, 10M, 10C is formed on a drum-shaped photoconductor 16 as an image carrier, a charging device 17 for charging the surface of the photoconductor 16, and a surface of the photoconductor 16. It is composed of a developing device 18 that supplies toner as a developing agent to form a toner image, a cleaning device 19 that cleans the surface of the photoconductor 16, and the like. In FIG. 1, only the image forming unit 10K forming the black image is designated by the photoconductor 16, the charging device 17, the developing device 18, and the cleaning device 19, and the other image forming units 10Y and 10M are designated. , 10C are omitted.

The transfer device 12 includes an endless intermediate transfer belt 20 stretched by a plurality of rollers, four primary transfer rollers 21 for transferring a toner image on each photoconductor 16 to the intermediate transfer belt 20, and an intermediate transfer belt 20. It is composed of a secondary transfer roller 22 or the like that transfers the toner image transferred above to paper.

The printing operation of the image forming apparatus according to the present embodiment will be described with reference to FIG.

When instructed to start the printing operation, the photoconductor 16 is rotationally driven in each of the image forming units 10K, 10Y, 10M, and 10C, and the surface of the photoconductor 16 is charged to a uniform high potential by the charging device 17. Next, the exposed portion is exposed by the optical writing device 11 exposing the surface of each photoconductor 16 based on the image information of the document read by the image reading device 2 or the print information instructed to print from the terminal. The potential of the light decreases and an electrostatic latent image is formed. Then, toner is supplied from the developing device 18 to the electrostatic latent image, and a toner image is formed on each photoconductor 16.

When the toner image formed on each photoconductor 16 reaches the position of the primary transfer roller 21 (primary transfer nip) as the photoconductor 16 rotates, the toner image is transferred so as to sequentially overlap the intermediate transfer belt 20 driven to rotate. Will be done. Then, the toner image transferred on the intermediate transfer belt 20 is conveyed to the position of the secondary transfer roller 22 (secondary transfer nip) as the intermediate transfer belt 20 rotates, and is transferred to the paper. This paper is supplied from the paper feed unit 4. The paper supplied from the paper feed unit 4 is temporarily stopped by the timing roller pair 13, and then conveyed at the timing when the toner image on the intermediate transfer belt 20 reaches the secondary transfer nip. Thus, a full-color toner image is supported on the paper. Further, after the toner image is transferred, the toner remaining on each photoconductor 16 is removed by each cleaning device 19.

The paper on which the toner image is transferred is conveyed to the fixing device 14, and the toner image is fixed on the paper by the fixing device 14. After that, the paper is ejected out of the apparatus by the output roller pair 15, and a series of printing operations is completed.

Next, the overall configuration of the image reading device 2 will be described in detail with reference to FIGS. 3 to 7.

As shown in FIGS. 3 and 4, the image reading device 2 includes, as a housing, a frame main body portion 40 forming the lower surface and side surfaces thereof, and a cover portion 41 forming the upper surface thereof. Contact glasses 32 are provided on the cover portion 41 at a portion 41a through which the original is passed in the conveyed document reading mode and a portion 41b on which the original is placed in the placed document reading mode. The frame main body 40 has a rectangular bottom wall 40a and four side wall portions 40b to 40e provided so as to stand upright from the four sides of the bottom wall 40a. Inside the frame body 40, an optical scanning unit 31, a guide rod 42 for guiding the optical scanning unit 31 in the sub-scanning direction X, and a guide rail for movably supporting the optical scanning unit 31 in the sub-scanning direction X are provided. 43 and a driving means for moving the optical scanning unit 31 in the sub-scanning direction X are provided. The optical scanning unit 31 reads the image of the original by moving from the predetermined home position (standby position) shown in FIGS. 5 and 6 along the guide rod 42 and the guide rail 43 in the sub-scanning direction X. Further, in order to reduce the sliding friction and smoothly move the optical scanning unit 31 to the sliding portions such as the guide rod 42 and the guide rail 43 that slide when the optical scanning unit 31 moves, grease or the like is used. Lubricant is applied.

5 is a plan view of the image reading device 2 with the cover portion 41 removed, FIG. 6 is a sectional view taken along line AA in FIG. 5, and FIG. 7 is a sectional view taken along line BB in FIG.

As shown in FIGS. 5 and 6, a flexible cable 44 for feeding or transmitting a signal is connected to the optical scanning unit 31. In this embodiment, a flexible flat cable (FFC) suitable for space saving is used as the cable 44. The substrate 35 of the optical scanning unit 31 and the main body substrate provided on the frame main body 40 are electrically connected via the cable 44. As shown in FIG. 6, the cable 44 is bent upward so as not to be caught in the lower side of the optical scanning unit 31 when the optical scanning unit 31 reciprocates in the sub-scanning direction X. It is arranged like this. The cable 44 is held by a claw-shaped cable holding portion 45 provided on the front side F surface in the movement start direction from the home position of the optical scanning unit 31 so that such a deflection is formed.

It is desirable that the substrate 35 provided on the optical scanning unit 31 is arranged in a position where the optical scanning unit 31 is arranged at the home position and is not visible to the user or the like in appearance, or is arranged in a position where it is difficult to see. Therefore, in the present embodiment, the substrate 35 is arranged on the rear side R of the optical scanning unit 31 in the movement start direction from the home position.

When the substrate 35 is arranged on the rear side R of the optical scanning unit 31 in the movement start direction in this way, the cable 44 is located on the side closer to the substrate 35 to which the cable 44 is connected, that is, in the movement start direction of the optical scanning unit 31. It may be arranged so as to bend at the rear side R. However, in the present embodiment, since there is little space on the rear side R in the movement start direction when the optical scanning unit 31 is placed in the home position, the cable 44 is bent and placed on the front side F opposite to this. There is.

Further, similarly to the substrate 35, it is preferable that the cable 44 is also arranged at a position invisible to the user or the like in appearance or in a position where it is difficult to see. Further, when the optical scanning unit 31 reciprocates in the sub-scanning direction X, if the cable 44 comes into contact with the contact glass 32, foreign matter adheres to the contact glass 32 and causes a defective image. From such a situation, it is preferable that the cable 44 is arranged at a position not directly under the contact glass 32 if possible. Therefore, in the present embodiment, as shown in FIG. 5, the cable 44 is arranged outside the guide rail 43 in the main scanning direction Y (upper side of the guide rail 43 in the drawing). On the other hand, if the cable 44 is arranged at a position far away from the guide rail 43 in the main scanning direction Y, the size of the main scanning direction Y of the image reading device 2 becomes large. Therefore, in the present embodiment, the cable 44 is used. It is arranged near the guide rail 43.

However, when the cable 44 is arranged in the vicinity of the guide rail 43 in this way, a bent portion of the cable 44 (a portion that is not held in position and can move freely) due to vibration or impact generated during transportation of the image forming apparatus or the like. ) May swing in the vertical direction or the diagonal direction, the cable 44 may come into contact with the guide rail 43, and the lubricant on the guide rail 43 may adhere to the cable 44. In that case, if the cable 44 further swings due to vibration or impact, the cable 44 may come into contact with the contact glass 32 and the lubricant may adhere to the contact glass 32. In the unlikely event that the lubricant adheres to the contact glass 32, it may cause a defective image.

Therefore, in the present embodiment, the following measures are taken in order to prevent the cable 44 from coming into contact with the guide rail 43 as described above.

As shown in FIG. 5, in the present embodiment, a switching member 50 for preventing the cable 44 from coming into contact with the guide rail 43 is provided in the frame main body 40 of the image reading device 2. The switching member 50 is a substantially rectangular plate-shaped member, and a rotating shaft 51 is provided at or near an intermediate portion in the longitudinal direction thereof. The switching member 50 rotates about a rotation axis 51 arranged in the vertical direction (direction intersecting the main scanning direction Y and the sub-scanning direction X), whereby the first position shown by the solid line in FIG. And the second position indicated by the alternate long and short dash line in FIG. 5 can be switched.

Further, the switching member 50 is rotatably attached to the partition wall portion 40f provided on the frame main body portion 40. The partition wall portion 40f is a plate-shaped wall portion extending in the sub-scanning direction X provided so as to partition the space outside the main scanning direction Y and the space other than the cable 44 in the frame main body 40. ..

FIG. 8 is a perspective view showing the switching member 50 and its peripheral structure.

As shown in FIG. 8, a through hole 40g is provided in a portion of the partition wall portion 40f to which the rotating shaft 51 of the switching member 50 is attached. The switching member 50 passes through the through hole 40g and is arranged inside (left side in FIG. 8) and outside (right side in FIG. 8) in the main scanning direction Y with the partition wall portion 40f as a boundary. Further, in order to allow the switching member 50 to rotate, the width G of the through hole 40 g is set to be larger than the thickness t of the switching member.

Here, the portion of the switching member 50 that is located inside the partition wall portion 40f in the main scanning direction Y is referred to as the "tip side", and the portion opposite to this is referred to as the "base end side". As shown in FIG. 8, a spring 52 as an urging member is attached to the proximal end side 50b of the switching member 50. One end of the spring 52 is attached to the base end side 50b of the switching member 50, and the other end of the spring 52 is attached to the projecting piece portion 40h protruding from the partition wall portion 40f. The switching member 50 is urged by the spring 52 in the direction of rotation from the first position to the second position (counterclockwise in FIG. 5).

Further, as shown in FIG. 8, an elastically deformable stopper portion 53 is provided on the base end side 50b of the switching member 50. The stopper portion 53 is arranged at a position capable of engaging with the convex wall portion 40i as an engaging portion provided so as to project inward from the side wall portion 40b of the frame main body portion 40. In a state where the stopper portion 53 is engaged with the convex wall portion 40i, the switching member 50 is maintained in the first position against the urging force of the spring 52.

Subsequently, the action and effect of the switching member 50 will be described.

First, in a state where the switching member 50 is arranged at the first position shown by the solid line in FIG. 5, the tip end side 50a of the switching member 50 is arranged below the cable 44. In this state, even if the cable 44 swings downward due to vibration, impact, or the like, the cable 44 comes into contact with the tip end side 50a of the switching member 50 arranged below the cable 44, so that the cable 44 comes into contact with the guide rail 43. Be prevented. That is, the switching member 50 functions as a contact prevention member that regulates the movement of the cable 44 toward the guide rail 43 and prevents the cable 44 from coming into contact with the guide rail 43 in the state of being arranged at the first position.

In this way, since the switching member 50 functions as a contact prevention member, if the switching member 50 is arranged at the first position at the time of assembling the image forming apparatus or before shipping the image forming apparatus, after that, Even if the image forming apparatus is subjected to vibration or impact during transportation and the cable 44 swings in the vertical direction or the oblique direction, the contact of the cable 44 with the guide rail 43 can be prevented. As a result, in the present embodiment, the lubricant on the guide rail 43 does not adhere to the cable 44, and the lubricant does not adhere to the contact glass 32, so that the occurrence of a defective image can be prevented. ..

The tip end side 50a of the switching member 50 does not necessarily have to be arranged between the cable 44 and the guide rail 43 in a state where it is arranged at the first position. For example, as in the example shown in FIG. 10, in a state where the switching member 50 is arranged at the first position, the tip end side 50a thereof is in the region E between the cable 44 and the guide rail 43 (the alternate long and short dash line in FIG. 10). Even if it is not arranged in the area E surrounded by), if the tip side 50a of the switching member 50 is arranged below the cable 44, when the cable 44 swings downward and moves to the guide rail 43 side. In some cases, the movement can be regulated by the switching member 50. As described above, if the switching member 50 is arranged at a position where the movement of the cable 44 to the guide rail 43 side can be restricted, the switching member 50 is not necessarily arranged in the region E between the cable 44 and the guide rail 43. May be good.

On the other hand, in order to more reliably regulate the movement (runout) of the cable 44, the switching member 50 is arranged in the first position, and the tip side 50a thereof is arranged over a wide range below the cable 44. It is desirable that it is done. Therefore, for example, as in the example shown in FIG. 9, the tip end side 50a of the switching member 50 may be arranged at the first position over the entire width W of the cable 44.

Further, in order to effectively prevent the cable 44 from coming into contact with the guide rail 43, it is desirable to regulate the downward runout of the cable 44 at a position as high as possible (a position far from the guide rail 43). On the other hand, if the position of the upper surface 50c (see FIG. 6) of the switching member 50 that regulates the runout of the cable 44 becomes too high, the size of the image reading device 2 in the height direction increases. Therefore, in order to regulate the runout of the cable 44 at a position as high as possible and avoid an increase in the size of the image reading device 2 in the height direction, for example, the upper surface 50c of the switching member 50 is set with the upper surface 31a of the optical scanning unit 31. It is better to place them at the same height.

Next, the operation of the switching member 50 when the image reading operation is started will be described.

When the image reading operation of the optical scanning unit 31 is started in the state where the switching member 50 is arranged at the first position as described above, the optical scanning unit 31 moving from the home position causes the switching member 50 to move to the first position. It is switched from the 1st position to the 2nd position. More specifically, as shown in FIG. 5, in the state where the switching member 50 is arranged at the first position, the tip end side 50a is in the state of entering the moving path H of the optical scanning unit 31. As shown in 11, when the optical scanning unit 31 starts moving, the optical scanning unit 31 comes into contact with the tip end side 50a of the switching member 50. Then, when the optical scanning unit 31 further moves, the engagement between the stopper portion 53 of the switching member 50 and the convex wall portion 40i is released, and the switching member 50 rotates counterclockwise in FIG. 11 due to the urging force of the spring 52. It rotates and is switched to the second position.

As shown by the alternate long and short dash line in FIG. 5, when the switching member 50 is switched to the second position, the tip end side 50a of the switching member 50 is arranged at a position retracted from the movement path H of the optical scanning unit 31. .. Further, in this state, the tip end side 50a of the switching member 50 is also retracted from the lower position of the cable 44. In this way, the switching member 50 is arranged at a position retracted from the movement path H of the optical scanning unit 31 in a state of being switched to the second position, so that the optical scanning unit 31 continues to move thereafter. Even if scanning is performed and the optical scanning unit 31 retracts to the home position side, the optical scanning unit 31 does not come into contact with the switching member 50. Further, in the state where the switching member 50 is switched to the second position, the switching member 50 is maintained at the second position by the urging force of the spring 52. Therefore, after the switching member 50 is switched to the second position, the optical scanning unit 31 does not come into contact with the switching member 50, and it is possible to prevent problems such as damage to parts due to these contacts. ..

Further, in the present embodiment, when the switching member 50 is switched from the first position to the second position, in order to prevent damage to the cable 44 due to the switching member 50 coming into contact with the cable 44, as shown in FIG. The switching member 50 is brought into contact with the cable holding portion 45 provided on the front side F of the optical scanning unit 31. Further, as in the example shown in FIG. 12, an elastic member 54 such as a sponge may be provided on the front side F of the cable holding portion 45. In this case, when the elastic member 54 comes into contact with the switching member 50, the impact on the cable holding portion 45 due to the contact with the switching member 50 is alleviated, so that the cable holding portion 45 can be less likely to be damaged. is there.

FIG. 13 is a flowchart for explaining the movement of the switching member 50 when the image reading operation is performed.

As shown in FIG. 13, when the image reading operation is started and the optical scanning unit 31 is started to move forward, if the switching member 50 is arranged in the first position (the switching member 50 is in the second position). As described above, the optical scanning unit 31 comes into contact with the switching member 50, and the engagement between the stopper portion 53 and the convex wall portion 40i is released, so that the switching member 5 is released.
0 is switched to the second position. Then, after the scanning by the optical scanning unit 31 is completed, the optical scanning unit 31 retracts and the image reading operation ends.

On the other hand, if the switching member 50 has already been switched to the second position at the start of the image reading operation, the optical scanning unit 31 completes the optical scanning as it is without contacting the switching member 50, and then the optical scanning is performed. The unit 31 retracts and the image reading operation ends. In this way, when the switching member 50 has already been switched to the second position, the optical scanning unit 31 does not come into contact with the switching member 50 even if it reciprocates in the sub-scanning direction X, so that the optical scanning unit 31 It is possible to prevent problems such as damage to parts due to contact with the switching member 50 each time the image reading operation is performed. Further, in the state where the switching member 50 is arranged at the second position, the tip side 50a of the switching member 50 is retracted from the lower position of the cable 44, so that the cable 44 moves with the reciprocating movement of the optical scanning unit 31. Even if it is displaced in the vertical direction, it does not come into contact with the switching member 50, and it is possible to prevent the occurrence of unexpected troubles due to the cable 44 coming into contact with the switching member 50.

As described above, in the present embodiment, the switching member 50 is automatically switched to the second position by contact with the optical scanning unit 31 that moves during the image reading operation, so that the operation of the user, the operator, or the like is performed. It is possible to switch the switching member 50 to the second position and arrange the switching member 50 at a position where the switching member 50 does not come into contact with the optical scanning unit 31 or the cable 44 without manually performing the switching operation of the switching member 50. Therefore, in the present embodiment, it is not necessary for the operator to manually switch the switching member 50 after transporting the image forming apparatus and before performing the image reading operation for the first time, which simplifies the operation and burdens the operation. Can also be reduced. Further, since it is not necessary for the operator to provide the image reading device with an operating unit such as a lever for operating the switching member 50 from the outside, it is possible to avoid an increase in the size of the image reading device due to the provision of the operating unit. ..

As described above, according to the configuration according to the present embodiment, since the manual switching operation of the switching member 50 by the operator and the operation unit for the operation are not required, the operability can be improved and the apparatus can be improved. It will be possible to reduce the size of the.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments. For example, the switching member 50 may be used as a contact prevention member for preventing contact between the cable 44 and the guide rod 42. When the cable 44 is arranged in the vicinity of the guide rod 42, if the cable 44 swings due to vibration or the like, the lubricant applied to the guide rod 42, which is a sliding portion, may adhere to the cable 44. In order to prevent this, the switching member 50 may be arranged on the guide rod 42 side in the main scanning direction Y, and the switching member 50 may regulate the movement (runout) of the cable 44 toward the guide rod 42 side.

Further, in the above-described embodiment, the case where the switching member 50 regulates the movement or displacement of the cable 44 has been described as an example, but the application of the switching member 50 is not limited to this. For example, the switching member 50 may be used as a member that regulates the movement of the optical scanning unit 31 during transportation. Also in that case, similarly to the above-described embodiment, the switching member 50 is automatically moved to the retracted position (second position) which does not contact the optical scanning unit 31 by the contact with the optical scanning unit 31 during the image reading operation. By switching, the manual switching operation by the operator and the operation unit for the operation become unnecessary, and the operability can be improved and the device can be downsized.

2 Image reader 3 Image forming unit 31 Optical scanning unit (image reader)
40 Frame body 40i Convex wall (engagement)
50 Switching member 50a Tip side 50b Base end side 51 Rotating shaft 52 Spring (biasing member)
53 Stopper part 54 Elastic member 100 Image forming device

Japanese Unexamined Patent Publication No. 2008-92372

Claims (7)

An image reader that reads an image by moving,
A switching member that can be switched between a first position that has entered the moving path of the image reading unit and a second position that has been retracted from the moving path of the image reading unit.
With
The image reading device is characterized in that the switching member is switched from the first position to the second position by coming into contact with the image reading unit when the image reading unit is moved. A sliding portion on which the image reading portion slides when the image reading portion moves, and a sliding portion.
The cable connected to the image reader and
With
The image reading device according to claim 1, wherein the switching member is arranged at the first position at a position that restricts the movement of the cable to the sliding portion side. 1. A claim 1 comprising an urging member that maintains the switching member in the second position when the switching member is switched from the first position to the second position by contact with the image reading unit. Or the image reading device according to 2. An engaging portion for maintaining the switching member in the first position by engaging with the switching member is provided.
The image reading according to claim 3, wherein the engagement between the engaging portion and the switching member is not released by the urging force of the urging member, but is released by the contact between the image reading unit and the switching member. apparatus. The image reading unit has a cable holding unit that holds the cable.
The image reading device according to claim 2, wherein when the image reading unit moves, the cable holding unit comes into contact with the switching member at the first position. The image reading unit has a cable holding portion for holding the cable and an elastic member provided on the cable holding portion.
The image reading device according to claim 2, wherein when the image reading unit moves, the elastic member comes into contact with the switching member at the first position. The image reading device according to any one of claims 1 to 6.
An image forming unit that forms an image on a recording medium based on the image information read by the image reading device.
An image forming apparatus comprising.

Images