JP2020202496A - Image reading device - Google Patents

Abstract

To reduce the possibility of damage to a first transparent member, when the first transparent member is bent upon receiving a load and downward displacement occurs, by preventing concentration of the load to one point.SOLUTION: An image reading device comprises: a first transparent member 13 on which a document is placed; a reading sensor 16 that is arranged below the first transparent member 13 and reads the document placed on the first transparent member 13; a slide part 18 that supports the reading sensor 16 from below movably in a direction along a surface of the first transparent member 13; and a support part 19 that can support the slide part 18 from below.SELECTED DRAWING: Figure 2

Description

The present invention relates to an image reader.

Conventionally, in a composite printing device with an automatic transfer device, the reading glass of the flatbed type image reading mechanism and the reading glass of the automatic transfer device are arranged side by side, and each reading glass is bridged by a bridging portion. There is.

The reading glass of the flatbed type image reading mechanism bends when it receives a load or the like, and may be damaged if the limit bending amount is exceeded. Therefore, various measures have been taken to reduce the risk of damage.

In Patent Document 1, a mounting member on which a manuscript is placed, a reading unit which is arranged so as to face the manuscript with the pre-described mounting member interposed therebetween and reads an image of the manuscript placed on the pre-described mounting member, and a front. In an image reading device having a housing that supports the outer peripheral edge portion of the mounting member, the support member has a supporting member that supports other than the outer peripheral edge portion of the mounting member described above, and the supporting member comes into contact with the housing. A configuration is disclosed in which a contact portion is provided and the above-mentioned mounting member can be supported in a state where the contact portion is in contact with the housing.
With this configuration, when the image reader receives an impact during distribution or the like, the support member supports the previously described member from the reading unit side to absorb the impact and damage the previously described member. It is stated that it can be prevented.

Japanese Unexamined Patent Publication No. 2013-066169

However, in the image reading device described in Patent Document 1, the above-mentioned placement member is directly supported by the support member provided with the contact portion that contacts the housing. Therefore, the impact applied to the above-mentioned placing member acts on the contact portion with the support member almost as it is. Therefore, the impact may be concentrated on the contact portion, and the previously described placing member may be damaged at the contact portion with the support member.

The image reading device of the present invention for solving the above problems has a first transparent member on which a document is placed and a document arranged below the first transparent member and placed on the first transparent member. It has a reading sensor for reading, a sliding portion that supports the reading sensor from below so as to be movable in a direction along the surface of the first transparent member, and a support portion that can support the sliding portion from below. It is characterized by.

A perspective view of a multifunction device provided with an image reader according to a first embodiment of the present invention as viewed from the front left. It is sectional drawing of the image reading apparatus which concerns on Embodiment 1, and is the YZ sectional view of the main part in the state which the reading sensor is located in the power-off position. The perspective view seen from the left front of the image reading apparatus which concerns on the same real form 1. XZ sectional view of the main part of the image reading apparatus which concerns on the same real form 1. FIG. FIG. 5 is an XZ cross-sectional view of a main part of the image reading device according to the second embodiment. XZ sectional view of the main part of the image reading apparatus which concerns on Embodiment 3.

First, the present invention will be described schematically.
The image reading device according to the first aspect of the present invention for solving the above problems is arranged below the first transparent member on which the original is placed and the first transparent member, and is placed on the first transparent member. A reading sensor that reads the mounted document, a sliding portion that supports the reading sensor from below so as to be movable in a direction along the surface of the first transparent member, and a support portion that can support the sliding portion from below. It is characterized by having and.

According to this aspect, it has a sliding portion that supports the reading sensor from below so as to be movable in a direction along the surface of the first transparent member, and a support portion that can support the sliding portion from below. As a result, when a load is applied to the first transparent member, the first transparent member is bent and deformed to cause a downward displacement, the downward displacement is arranged below the first transparent member. It is transmitted to the reading sensor, and further transmitted to the sliding portion that supports the reading sensor from below. Then, the sliding portion is displaced downward to be supported by the support portion, whereby the downward displacement due to the bending deformation of the first transparent member is stopped.
In other words, when the first transparent member receives a load and bends to cause a downward displacement, the displacement is not directly received by the support portion, but via the reading sensor and the sliding portion. That is, it is a structure in which these are placed in between and indirectly received by the support portion. As a result, the load is not concentrated on one place of the contact portion as in the conventional case, so that when a load is applied to the first transparent member and the first transparent member is bent, the possibility that the first transparent member is damaged can be reduced. Can be done.

In the first aspect, the image reading device according to the second aspect of the present invention includes a second transparent member for reading the automatically transported document by the reading sensor, the first transparent member, and the second transparent member. The support portion is characterized in that it has a bridging portion that bridges the bridge, and the position of the support portion is a position that can regulate the downward displacement that occurs in the sliding portion due to the downward displacement of the bridging portion. To do.

In an image reading device of a type provided with a second transparent member for reading an automatically transported document, the first transparent member receives a load at a bridging portion that bridges the first transparent member and the second transparent member. In this case, it is a region where the amount of deformation is large.
According to this aspect, the position of the support portion is a position where the downward displacement caused by the sliding portion due to the downward displacement of the bridging portion can be regulated. In other words, the support portion is arranged below the bridging portion at a position where the displacement of the sliding portion by a predetermined amount or more can be regulated. As a result, since the support portion is located at a position where the amount of deformation is large, the risk of damage to the first transparent member can be effectively reduced.

In the image reading device of the third aspect of the present invention, in the first aspect or the second aspect, the reading sensor is movably supported at both ends, and the sliding portion is supported at both ends. It is a feature.

According to this aspect, since both ends of the reading sensor are supported, the reading sensor bends and deforms downward when a load is applied to the reading sensor based on the bending deformation of the first transparent member. Can receive the load. Further, since both ends of the sliding portion are supported, the load can be received by bending and deforming the sliding portion downward as the reading sensor bends and deforms downward.
In other words, when the first transparent member is bent by receiving a load and is displaced downward, the elastic rebound force based on the bending deformation of the reading sensor and the bending deformation of the sliding portion is used as the first step. It can receive the load. Moreover, since the elastic rebound force increases as the bending deformation of the reading sensor and the bending deformation of the sliding portion increase, the elastic rebound force also increases as the amount of bending deformation of the first transparent member increases. The load can be received in the direction of reducing the load. That is, the effect of reducing the load can be obtained at a stage before the sliding portion is supported by the support portion.
Then, as the second step, by reaching the state where the sliding portion is supported by the support portion, it is possible to reduce the possibility that the first transparent member is damaged as in the first aspect.

In the image reading device of the fourth aspect of the present invention, in any one of the first to third aspects, the position of the support portion is at a position overlapping the reading sensor located in the power off position. It is characterized by being.
Here, the "power off position" means a position taken by the reading sensor when the power of the image reading device is turned off.
Further, the "overlapping position" is not limited to the positional relationship in which the support portion and the reading sensor are entirely overlapped with each other in the top view of the image reading device, but also includes a position where at least a part of the supporting portion and the reading sensor are overlapped with each other. Is used in. The same applies to other aspects.

According to this aspect, when the first transparent member is bent by receiving a load and is displaced downward in the power-off state, the position of the support portion is the reading sensor located at the power-off position. Since the position overlaps with, the same effect as in the first aspect can be obtained.

The image reading device according to the fifth aspect of the present invention is characterized in that, in the fourth aspect, the position of the reading sensor at the power-off position overlaps with the bridging portion.

According to this embodiment, when the first transparent member is bent by receiving a load and is displaced downward in the power-off state, the position of the bridging portion is the reading sensor located at the power-off position. Since the position overlaps with, the same effect as in the second aspect can be obtained.

In the image reading device of the sixth aspect of the present invention, in any one of the first to fifth aspects, the support portion is arranged at a plurality of different positions in the direction along the sliding portion. It is characterized by being.

According to this aspect, since the support portion is arranged at a plurality of different positions in the direction along the sliding portion, downwardly generated in the first transparent member at a plurality of different positions along the sliding portion. Displacement can be dealt with.

The image reading device according to the seventh aspect of the present invention is characterized in that, in any one of the first to sixth aspects, a relaxation member is provided between the support portion and the sliding portion. And.

According to this aspect, since the relaxation member is provided between the support portion and the sliding portion, it is possible to alleviate the impact when the sliding portion is supported by the support portion. Further, since the sliding portion is supported by the support portion via the relaxation member, there is little possibility that the sliding portion will be damaged by being supported by the support portion.

The image reading device according to the eighth aspect of the present invention has a gap between the sliding portion and the supporting portion in any one of the first to seventh aspects. It is characterized by.

According to this aspect, since there is a gap between the sliding portion and the supporting portion, when designing a structure for movably attaching the reading sensor to the sliding portion, the design of the mounting structure is performed. The degree of freedom is increased, and the performance can be improved by an appropriate mounting structure.

The image reading device according to the ninth aspect of the present invention is characterized in that, in the eighth aspect, the gap is provided to be smaller than the limit deflection amount of the first transparent member.
Here, the "limit amount of deflection" is the degree of deflection caused by applying a load to the first transparent member, and refers to the limit amount of deflection that does not lead to fracture, and is determined by the strength, size, and thickness of the material. ..

According to this aspect, since the gap is provided to be smaller than the limit bending amount of the first transparent member, the first transparent member is not displaced downward beyond the limit bending amount, and thus the said. The risk of damage to the first transparent member can be reduced.

In the image reading device according to the tenth aspect of the present invention, in any one of the first to seventh aspects, the support portion has an elastic member, and the elastic member is the sliding portion. It is characterized by pushing with a constant force.
Here, the "constant force" is set as a force within a range in which the support portion can suppress the bending deformation of the first transparent member due to the load by pushing the sliding portion.

According to this aspect, the support portion has an elastic member, and the elastic member pushes the sliding portion with a constant force. As a result, when the load from above on the sliding portion is equal to or less than the "constant force", it is possible to prevent the sliding portion from bending. Further, when the load on the sliding portion is larger than the "constant force", the sliding portion is displaced downward, and the elastic member is displaced downward on the sliding portion. Deformation occurs based on. Since this deformation causes an upward repulsive force on the elastic member, the amount of downward displacement caused by the load can be suppressed to a small size.

In the image reading device according to the eleventh aspect of the present invention, in any one of the first to ninth aspects, the support portion has an elongated shape extending along the moving direction of the sliding portion. It is characterized by being.

According to this aspect, since the support portion has an elongated shape extending along the sliding portion, the support portion causes a downward displacement of the sliding portion in a wide range along the sliding portion. It can be suppressed.

[Embodiment 1]
Hereinafter, the recording device of the present invention will be described in detail by taking the first embodiment shown in FIGS. 1 to 4 as an example.
In the following description, the direction along the Y axis is the width direction of the image reader, the + Y direction is the left direction when the multifunction device 1 is viewed from the front, and the −Y direction is the front view of the multifunction device 1. To the right of. Further, the direction along the X axis is the device depth direction, the + X direction is the direction from the back surface of the device to the front surface of the device, and the −X direction is the direction from the front surface of the device to the back surface. Further, the direction along the Z axis is the vertical direction, the + Z direction is the vertical upper direction, and the −Z direction is the vertical lower direction.

The overall configuration of the multifunction device 1 having the scanner unit 10 will be described with reference to FIG. The multifunction device 1 shown in FIG. 1 has a printing unit 2 that has a printing function, and a scanner unit 10 that has an image reading function above the printing unit 2.

As shown in FIG. 1, an operation unit 6 is provided on the upper part of the front surface of the device of the multifunction device 1. The operation unit 6 is provided with a display means such as a liquid crystal panel. By operating the operation unit 6, instructions for the printing operation in the printing unit 2 and the image reading operation in the scanner unit 10 are input to the multifunction device 1.

As shown in FIG. 1, the printing unit 2 in the multifunction device 1 includes a paper storage cassette 3 for storing printing paper at the lower part. A printing unit 4 is provided inside the printing unit 2, and the printing unit 4 executes printing on the printing paper conveyed from the paper storage cassette 3. The printed printing paper is ejected from the ejection unit 7 and placed on the ejection tray 5. In the multifunction device 1, the discharge unit 7 and the discharge tray 5 are provided between the scanner unit 10 and the paper storage cassette 3 in the Z-axis direction, which is the height direction of the device.

As shown in FIG. 1, the scanner unit 10 automatically reads an image reading device 11 that reads a document placed on a first transparent member 13 that is a transparent document stand, and a document placed on a feeding tray 20. It is provided with an automatic transport device 12 for transporting and passing through the image reading area of the image reading device 11. The automatic transfer device 12 is provided above the image reading device 11.

As shown in FIG. 1, the automatic transfer device 12 is openably and closably connected to the image reading device 11 with a rotation fulcrum at the rear end of the image reading device 11, that is, in the −X direction. The automatic transfer device 12 is configured to be able to switch between a closed posture as shown by a solid line in FIG. 1 and an open posture as shown by a dotted line in FIG. By opening the automatic transfer device 12, the first transparent member 13 which is a platen on which the original is placed is opened.

<Image reader>
As shown in FIGS. 2 and 3, the image reading device 11 according to the present embodiment is arranged below the first transparent member 13 on which the original is placed and the first transparent member 13, and is the first transparent member. A reading sensor 16 that reads a document placed on a document 13, a sliding portion 18 that supports the reading sensor 16 from below so as to be movable in a direction along the surface of the first transparent member 13, and a sliding portion 18 that supports the sliding portion 18 from below. It has a possible support portion 19.
The present embodiment further includes a second transparent member 14 for reading the automatically transported document by the reading sensor 16, and a bridging portion 15 for bridging the first transparent member 13 and the second transparent member 14. The position of the support portion 19 is a position where the downward displacement generated in the sliding portion 18 due to the downward displacement of the bridging portion 15 can be regulated.
Hereinafter, each configuration of the image reading device 11 will be specifically described with reference to FIGS. 2 to 4.

<First transparent member>
The first transparent member 13 is a platen on which a document is placed, and has a size on which the document can be placed. As shown in FIG. 2, the first transparent member 13 is a colorless and transparent rectangular glass plate. The direction of the long side of this rectangular glass plate is along the longitudinal direction of the sliding portion 18. The two long sides and the three short sides of the rectangular first transparent member 18 are supported from below by the upper end of the frame 34 (FIG. 3) of the image reading device 11. The image of the document placed on the first transparent member 23 is read by the reading sensor 16 through the first transparent member 13.

As shown in FIG. 2, the first transparent member 13 is held by bridging the remaining one side not supported by the frame 34 to the second transparent member 14 by the bridging portion 15. In the present embodiment, the second transparent member 14 is supported by the frame 34 from below on three sides other than the one side held by the bridging portion 15.

<Bridge section>
As described above, the bridging portion 15 bridges the first transparent member 13 and the second transparent member 14. Specifically, the bridging portion 15 has a reinforcing member 21 formed by bending a metal plate, and the outer peripheral edge portion of the first transparent member 13 in the + Y direction and the second transparent member 14 in the −Y direction. The outer peripheral edge portion is attached to the reinforcing member 21 and bridged. Here, the end portion of the reinforcing member 21 in the + Y direction is subjected to a hemming bending process in order to improve the rigidity.
The bridging portion 15 is a region in which the amount of deformation is large when the first transparent member 13 receives a load.

<Reading sensor>
As described above, the reading sensor 16 reads the image of the document placed on the first transparent member 13. In the present embodiment, the reading sensor 16 is a CIS (Contact Image Sensor) type image sensor. The reading sensor 16 has a length in the X direction that can read a width corresponding to the width of the first transparent member 13 in the X direction.

As shown in FIG. 2, the reading sensor 16 is arranged below the first transparent member 13, the second transparent member 14, and the bridging portion 15. Further, the reading sensor 16 is supported from below by the sliding portion 18 via the carriage 17.
Both ends of the reading sensor 16 in the X direction are movably supported by the frame 34 as described above. The reading sensor 16 reads the image of the document placed on the first transparent member 13 by moving it.

<Sliding part>
As shown in FIG. 2, the sliding portion 18 is a guide shaft arranged in parallel with the Y-axis, and the reading sensor 16 is directed along the surface of the first transparent member 13 via the carriage 17, that is, the Y-axis. Supports movable in parallel directions. Further, the sliding portion 18 is supported at both ends in the Y-axis direction by the metal shaft support portions 32a and 32b (FIG. 3) fixed to the metal reinforcing member 31 fixed to the base frame 33. ..
The sliding portion 18 is not limited to the guide shaft, and may be formed of, for example, a resin rail.

In the present embodiment, the carriage 17 is attached to the sliding portion 18 by the sliding portion 36 which comes into contact with the sliding portion 18 from the side surface to the upper side as shown in FIG. That is, the slide portion 36 has a structure in which the lower side of the sliding portion 18 is open. The reading sensor 16 includes a grounding plate 29 for removing static electricity, and the tip of the grounding plate 29 is grounded to the open portion below the side surface of the sliding portion 18.
The slide portion 36 may have a non-open structure that surrounds the entire circumference of the sliding portion 18.

In the present embodiment, the drive unit 22 (FIG. 3) for moving the reading sensor 16 along the sliding unit 18 is composed of a belt and pulley mechanism, a stepping motor, or the like, as shown in FIG. .. As shown in FIGS. 2 and 3, the drive unit 22 moves the carriage 17 via the belt 22a constituting the belt and pulley mechanism.

As shown in FIG. 2, the flexible flat cable 30 (hereinafter referred to as “FFC30”) electrically connects a control unit (not shown) and a reading sensor 16 held by the carriage 17. The FFC 30 is a flexible cable that deforms following the moving motion of the carriage 17.
The FFC 30 extends from the carriage 17 in the + Y direction, then reverses downward with a bending radius, and extends in the −Y direction.

<Support part>
As shown in FIGS. 2 and 4, the support portion 19 is provided so that the sliding portion 18 can be supported from below. The support portion 19 is provided on the base frame 33 (FIG. 2) and is integrally formed with the base frame 33. In the present embodiment, the support portion 19 has a cylindrical shape as shown in FIG. 4, but it is needless to say that the support portion 19 is not limited to this shape. As shown in FIG. 2, the support portion 19 is provided on the base frame 33 and is integrally formed with the base frame 33.
As described above, the support portion 19 is arranged at a position where the downward displacement generated in the sliding portion 18 due to the downward displacement of the bridging portion 15 can be regulated. In other words, the support portion 19 is arranged below the bridging portion 15 at a position where the displacement of the sliding portion 18 by a predetermined amount or more can be regulated.
The support portion 19 may be formed in an elongated shape extending along the sliding portion 18 in order to suppress downward displacement in a wide range along the sliding portion 18.

As shown in FIGS. 2 and 4, the support portion 19 has a gap 23 between the sliding portion 18 and the support portion 19. By having this gap 23, when designing a structure in which the reading sensor 15 is movably attached to the sliding portion 18, the degree of freedom in designing the attachment structure is increased, and thus performance is achieved by providing an appropriate attachment structure. Can be improved.
Further, the dimension of the gap 23 in the Z direction is provided to be smaller than the limit bending amount of the first transparent member 13. As a result, the first transparent member 13 is not displaced downward beyond the limit deflection amount, and thus the risk of damage to the first transparent member 13 can be reduced. Here, the "limit amount of deflection" is the degree of deflection caused by applying a load to the first transparent member 13, and refers to the limit amount of deflection that does not lead to fracture, and is determined by the strength, size, and thickness of the material. ..

Further, in the present embodiment, the support portion 19 is arranged at a position overlapping the reading sensor 16 located at the power off position 26. Here, the "power off position 26" is a position taken by the reading sensor 16 when the power of the image reading device 11 is turned off. Further, the "overlapping position" is used to mean that the support portion 19 and the reading sensor 16 are not limited to the positional relationship in which the support portion 19 and the reading sensor 16 overlap each other in the top view of the image reading device 11, but also include a position in which at least a part of the support portion 19 overlaps with each other. It has been.
Further, in the present embodiment, the position of the reading sensor 16 at the power-off position 26 is a position that overlaps with the bridging portion 15. Here, some of them overlap, but a structure in which all of them overlap may be used.

<Explanation of the effect of the first embodiment>
(1) According to the present embodiment, a sliding portion 18 that supports the reading sensor 16 from below so as to be movable in a direction along the surface of the first transparent member 13, and a supporting portion that can support the sliding portion 18 from below. Has 19. As a result, when a load is applied to the first transparent member 13 and the first transparent member 13 is bent and deformed to cause a downward displacement, the downward displacement is arranged below the first transparent member 13. It is transmitted to the reading sensor 16 and further transmitted to the sliding portion 18 that supports the reading sensor 16 from below. Then, the sliding portion 18 is displaced downward and is supported by the support portion 19, whereby the downward displacement of the first transparent member 13 due to the bending deformation is stopped.
In other words, when the first transparent member 13 receives a load and bends to cause a downward displacement, the displacement is not directly received by the support portion 19, but via the reading sensor 16 and the sliding portion 18. That is, it is a structure in which these are placed in between and indirectly received by the support portion 19. Therefore, since the load is not concentrated on one place of the contact portion as in the conventional case, it is possible to reduce the possibility that the first transparent member 13 is damaged when the load is applied to the first transparent member 13 and the first transparent member 13 is bent. it can.

(2) In the type of image reading device including the second transparent member 14 for reading the automatically transported document according to the present embodiment, the bridging portion 15 that bridges the first transparent member 13 and the second transparent member 14. Is a region where the amount of deformation is large when the first transparent member 13 receives a load.
According to the present embodiment, the position of the support portion 19 is a position where the downward displacement caused in the sliding portion 18 due to the downward displacement of the bridging portion 15 can be regulated. In other words, the support portion 19 is arranged below the bridging portion 15 at a position where the displacement of the sliding portion 18 by a predetermined amount or more can be regulated. Therefore, since the support portion 19 is located at a position where the amount of deformation is large, the risk of damage to the first transparent member 13 can be effectively reduced.

(3) In the present embodiment, since both ends of the reading sensor 16 are supported by the frame 34, the reading sensor 16 moves downward when a load is applied to the reading sensor 16 based on the bending deformation of the first transparent member 13. The load can be received by bending and deforming. Further, since both ends of the sliding portion 18 are supported, the load can be received by bending and deforming the sliding portion 18 downward as the reading sensor 16 bends and deforms downward.
In other words, when the first transparent member 13 bends under a load and is displaced downward, the elastic rebound force based on the bending deformation of the reading sensor 16 and the bending deformation of the sliding portion 18 is used as the first step. It can receive the load. Moreover, since the elastic rebound force increases as the bending deformation of the reading sensor 16 and the bending deformation of the sliding portion 18 increase, the elastic rebound force also increases as the bending deformation amount of the first transparent member 13 increases. The load can be received in the direction of reducing the load. That is, the effect of reducing the load can be obtained at a stage before the sliding portion 18 is supported by the support portion 19.
Then, as the second step, the sliding portion 18 is supported by the support portion 19, so that the possibility that the first transparent member 13 is damaged can be reduced as described above.

(4) According to the present embodiment, when the first transparent member 13 is bent by receiving a load and is displaced downward while the image reading device 11 is turned off, the position of the support portion 19 is determined. Since the position overlaps with the reading sensor 16 located at the power off position 26, the same effect as in (1) above can be obtained.
Further, according to the present embodiment, since the position of the bridging portion 15 overlaps with the reading sensor 16 located at the power off position 26, the same effect as in (2) can be obtained.

Further, since the power off position 26 of the reading sensor 16 is set at a position overlapping the bridging portion 15, as shown in FIG. 2, a sufficient distance between the reading sensor 16 of the power off position 26 and the frame 34 in the + Y direction is taken. be able to. As a result, the bending radius of the FCC 30 can be sufficiently taken at the power off position 26, so that the FFC 30 is not left in a bent state with a small bending radius when the power is turned off for a long time, and the FCC 30 has a bending habit or the like. The risk of causing damage can be reduced.

[Embodiment 2]
The image reading device 11 according to the second embodiment in which a part of the structure of the first embodiment is changed will be described with reference to FIG.
In the present embodiment, as shown in FIG. 5, a relaxation member 24 is provided between the support portion 19 and the sliding portion 18. In the present embodiment, the support portion 19 has a relaxation member 24 at the upper portion. That is, the support portion 19 is configured to support the sliding portion 18 by directly contacting the relaxation member 24 when the sliding portion 18 is displaced downward. Here, the relaxation member 24 is made of a rubber material in the present embodiment, but may be made of a spring material.
The relaxation member 24 may be provided at a position corresponding to the support portion 19 of the sliding portion 18.

According to the present embodiment, since the relaxation member 24 is provided between the support portion 19 and the sliding portion 18, the impact when the sliding portion 18 is supported by the support portion 19 can be alleviated. Further, since the sliding portion 18 is supported via the relaxation member 24, there is little possibility that the sliding portion 18 will be damaged by being supported by the supporting portion 19.

[Embodiment 3]
The image reading device 11 according to the third embodiment in which a part of the structure of the first embodiment is changed will be described with reference to FIG.
In the present embodiment, as shown in FIG. 6, the support portion 19 has an elastic member 25, and the elastic member 25 has a structure in which the sliding portion 18 is pushed by a constant force F.
Here, the "constant force" is set as a force within a range in which the support portion 19 pushes the sliding portion 18 to suppress the bending deformation of the first transparent member 13 due to the load.
The elastic member 25 has a thickness larger than the dimension of the gap 23 in the Z direction. That is, the elastic member 25 is compressed and installed in the gap 23, and the sliding portion 18 is pushed upward with a constant force by the repulsive force based on the compression. Although the elastic member 25 is made of a rubber material, it may be made of a spring material.
Further, the elastic member 25 may be attached to the lower part of the sliding portion 18 or may be attached to the upper part of the support portion 19.

According to the present embodiment, the support portion 19 has an elastic member 25, and the elastic member 25 pushes the sliding portion 18 with a constant force F. Therefore, when the load from above on the sliding portion 18 is a constant force F or less, it is possible to prevent the sliding portion 18 from bending. Further, when the load on the sliding portion 18 is larger than a constant force F, the sliding portion 18 is displaced downward, and the elastic member 25 is based on the downward displacement of the sliding portion 18. Deformation occurs. Since the elastic member 25 is subjected to an upward repulsive force due to this deformation, the amount of downward displacement caused by the load can be suppressed to a small size.

[Other Embodiments]
The recording device 1 according to the embodiment of the present invention is basically having the above-mentioned solid configuration, but the partial configuration may be changed or omitted without departing from the gist of the present invention. Of course it is possible to do so.

The support portion 19 may have a structure in which a plurality of different positions are arranged in a direction along the sliding portion 18. In this case, the heights of the support portions 19 provided at a plurality of different positions may be different heights.
According to this structure, it is possible to deal with the downward displacement that occurs in the first transparent member 13 at a plurality of different positions along the sliding portion 18.

Further, when a load is applied to the first transparent member 13, it is assumed that the document is set on the platen of the image reading device 11. Therefore, as shown in FIG. 2, it is preferable that the home position 27, which is the movement start position of the reading sensor 16 when reading the document, is provided at a position overlapping the bridging portion 15 in the top view. In FIG. 2, reference numeral 28 indicates the position of the reading sensor 16 when reading the image of the document automatically transported by the automatic transport device 12, and is referred to as the ADF home position or the standby position.

Further, the position of the reading sensor 16 when transporting the image reading device may be the same as the position of the power off position 26.

1 ... Multifunction device, 2 ... Printing unit, 3 ... Paper storage cassette, 4 ... Printing unit,
5 ... Discharge tray, 6 ... Operation unit, 7 ... Discharge unit, 10 ... Scanner unit,
11 ... Image reader, 12 ... Automatic transfer device, 13 ... First transparent member,
14 ... 2nd transparent member, 15 ... bridging part, 16 ... reading sensor, 17 ... carriage,
18 ... Sliding part, 19 ... Support part, 20 ... Feed tray, 21 ... Reinforcing member,
22 ... Drive unit, 22a ... Belt, 23 ... Gap, 24 ... Relaxing member, 25 ... Elastic member,
26 ... Power off position, 27 ... Home position,
28 ... ADF home position or standby position, 29 ... ground plate,
30 ... FFC, 31 ... Reinforcing member, 32a, 32b ... Shaft support,
33 ... base frame, 34 ... frame

Claims (11)

The first transparent member on which the manuscript is placed and
A reading sensor, which is arranged below the first transparent member and reads a document placed on the first transparent member,
A sliding portion that supports the reading sensor from below so as to be movable in a direction along the surface of the first transparent member.
A support portion that can support the sliding portion from below,
An image reading device comprising. In the image reading apparatus according to claim 1,
A second transparent member for reading the automatically transported document with the reading sensor,
It has a bridging portion that bridges the first transparent member and the second transparent member.
The position of the support portion is a position where the downward displacement caused by the sliding portion due to the downward displacement of the bridging portion can be regulated.
An image reader characterized by this. In the image reading apparatus according to claim 1 or 2.
The reading sensor is supported so that both ends can be moved.
Both ends of the sliding portion are supported,
An image reader, characterized in that. In the image reading apparatus according to any one of claims 1 to 3,
The position of the support portion is a position that overlaps with the reading sensor located at the power off position.
An image reader characterized by this. In the image reading apparatus according to claim 4,
The position of the reading sensor in the power off position is a position overlapping the bridging portion.
An image reader characterized by this. In the image reading apparatus according to any one of claims 1 to 5,
The support portion is arranged at a plurality of different positions in the direction along the sliding portion.
An image reader characterized by this. In the image reading apparatus according to any one of claims 1 to 6.
A relaxation member is provided between the support portion and the sliding portion.
An image reader characterized by this. In the image reading apparatus according to any one of claims 1 to 7.
There is a gap between the sliding portion and the support portion.
An image reader characterized by this. In the image reading apparatus according to claim 8,
The gap is provided to be smaller than the limit deflection amount of the first transparent member.
An image reader characterized by this. In the image reading apparatus according to any one of claims 1 to 7.
The support portion has an elastic member and has an elastic member.
The elastic member pushes the sliding portion with a constant force.
An image reader characterized by this. In the image reading device according to any one of claims 1 to 9.
The support portion has an elongated shape extending along the sliding portion.
An image reader characterized by this.

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