Image reading device and image forming device

Abstract

To provide an image reading device and an image forming device that prevent a flat cable from coming into contact with a contact glass.SOLUTION: An image reading device 10 includes a contact glass 11, a frame 12, a scanner 14, a flat cable 30, and a roller mechanism 40. The flat cable connects the scanner 14 and the frame 12 to each other. The roller mechanism 40 has a tensioning member that applies tension to the flat cable 30. When the scanner 14 advances to one side RF, the roller mechanism 40 advances together with the flat cable 30 while the tensioning member applies tension to the flat cable 30 toward the other side RB. When the scanner 14 retreats to the other side RB, the roller mechanism 40 retreats together with the flat cable 30 while the tensioning member applies tension to the flat cable 30 toward the other side RB.SELECTED DRAWING: Figure 8

Description

[Technical field]

[0001] The present disclosure relates to an image reading device and an image forming device. [Background technology]

[0002] Patent Document 1 discloses an image reading device. The image reading device of Patent Document 1 includes a scanner that moves back and forth on the underside of the contact glass, a frame that supports the contact glass, and a flat cable that connects the scanner and the frame. In the image reading device of Patent Document 1, an expandable and contractible movable guide is interposed between the flat cable and the contact glass to prevent contact between the flat cable and the contact glass. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2017-225089 A Summary of the Invention [Problem to be solved by the invention]

[0004] In the image reading device of Patent Document 1, the tension applied to the flat cable changes as the scanner moves back and forth. If the tension applied to the flat cable weakens, the flat cable may come into contact with the contact glass, depending on the relationship between the maximum length of the movable guide and the length of the flat cable.

[0005] In view of the above problems, an object of the present disclosure is to provide an image reading device and an image forming device that prevent a flat cable from coming into contact with a contact glass. [Means for solving the problem]

[0006] According to a first aspect of the present disclosure, an image reading device includes a contact member, a frame, a scanner, a flat cable, and a roller mechanism. A document to be read is placed on an upper surface of the contact member. The frame supports the contact member. The scanner has a reading mechanism extending in a first direction, and moves back and forth in a second direction intersecting the first direction on the lower surface side of the contact member. The flat cable connects the scanner to the frame. The roller mechanism moves in the second direction together with the flat cable as the scanner moves back and forth. When the document is read, the scanner advances from a predetermined standby position to one side in the second direction. After the document is read, the scanner retreats to the other side in the second direction toward the standby position. The roller mechanism has a tensioning member that applies tension to the flat cable. When the scanner advances to one side in the second direction, the roller mechanism advances together with the flat cable while the tensioning member applies tension to the flat cable to the other side in the second direction. When the scanner retracts toward the other side in the second direction, the roller mechanism retracts together with the flat cable while the tension applying member applies tension to the flat cable toward the other side in the second direction.

[0007] According to a second aspect of the present disclosure, an image forming apparatus includes an image reading device and an image forming section. The image reading device is as described in the first aspect. The image forming section forms an image on a recording medium. Effect of the Invention

[0008] According to the image reading device and image forming apparatus of the present disclosure, it is possible to prevent the flat cable from coming into contact with the contact members. [Brief description of the drawings]

[0009] [Figure 1] FIG. 1 is a plan view of an example of an image reading device. [Diagram 2] FIG. 2 is a partial perspective view showing a part of the image reading device. [Diagram 3] FIG. 4 is a rear view showing the roller mechanism and the scanner guide. [Figure 4] FIG. [Diagram 5] 11 is a cross-sectional view showing how a reaction force is accumulated in a leaf spring of a tension applying member. FIG. [Figure 6] 11 is a cross-sectional view showing a state in which a reaction force accumulated in a leaf spring of a tension applying member is released. FIG. [Figure 7] FIG. 13 is a side cross-sectional view showing the scanner moving forward. [Figure 8] FIG. 11 is a side cross-sectional view showing the state in which the scanner retracts. [Figure 9] FIG. 1 illustrates an example of a configuration of an image forming apparatus. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] <Embodiment 1> Hereinafter, the first embodiment will be described with reference to the drawings. In the drawings, the same or corresponding parts are designated by the same reference characters and description thereof will not be repeated.

[0011] First, the configuration of an example of an image reading device 10 will be described with reference to Fig. 1 and Fig. 2. Fig. 1 is a schematic diagram showing the configuration of an example of an image reading device 10. Fig. 2 is a partial perspective view showing a part of the image reading device 10. The image reading device 10 includes a contact glass 11, a frame 12, a scanner 14, a flat cable 30, and a roller mechanism 40.

[0012] The contact glass 11 is disposed above the image reading device 10. The document 20 to be read is placed on the upper surface of the contact glass 11. The frame 12 supports the contact glass 11. The contact glass 11 corresponds to, for example, a contact member. The contact member is not limited to the contact glass 11, and may be a transparent synthetic resin member. The frame 12 is provided with a control unit (not shown) that controls the operation of the image reading device 10. The control unit includes a control unit composed of a CPU (Central Processing Unit), RAM (Random Access Memory), and ROM (Read Only Memory), etc., and a hardware circuit such as an analog / digital conversion circuit.

[0013] The scanner 14 has a reading mechanism 13 extending in a first direction R1 (main scanning direction). The reading mechanism 13 includes a light emitting unit (not shown) and a light receiving unit (not shown). The light emitting unit includes a plurality of light emitters. The light emitting unit is, for example, an LED (Light Emitting Diode), and the light emitting unit may include a plurality of colored LEDs such as a red LED, a green LED, and a blue LED. The light receiving unit includes an image sensor such as a CMOS (Complementary Metal Oxide Semiconductor) element. The reading mechanism 13 uses the light emitting unit to irradiate light toward the document 20 to be read, and receives the reflected light reflected by the document 20 using the light receiving unit. The light receiving unit converts the received light into an electrical signal to obtain image data for one line in the first direction R1.

[0014] When reading the original 20, the scanner 14 moves back and forth below the contact glass 11 in a second direction R2 (sub-scanning direction) that intersects with the first direction R1. The scanner 14 is moved by two belts 22. Each of the two belts 22 extends parallel to the second direction R2. A driver 16 is connected to one of the two belts 22. The driver 16 is equipped with a power source such as a motor, and drives the belt 22 to circulate in the second direction R2.

[0015] A belt connecting portion 24 extending in the first direction R1 is disposed below the belt 22. The belt connecting portion 24 transmits the motion of the belt 22 connected to the driver 16 to the belt 22 not connected to the driver 16. By transmitting the motion through the belt connecting portion 24, the two belts 22 move at the same speed as each other.

[0016] The two belts 22 are each connected to a scanner 14. The two belts 22 extending parallel to the second direction R2 move at the same speed as each other, causing the scanner 14 to move back and forth in the second direction R2.

[0017] Specifically, the scanner 14 advances from a predetermined standby position X0 to one side RF (the right side in FIG. 1) in the second direction R2 when the original 20 is read. Then, after the original 20 is read, the scanner 14 retreats to the other side RB (the left side in FIG. 1) in the second direction R2 toward the standby position X0.

[0018] The flat cable 30 is, for example, a ribbon-shaped flexible flat cable in which multiple conductive wires are covered with a resin film. The flat cable 30 connects the scanner 14 and the frame 12. One end of the flat cable 30 is connected to the scanner connection portion 14a of the scanner 14. As shown in FIG. 2, a connector 34 is attached to the flat cable 30 at a position near the scanner connection portion 14a. The connector 34 fixes one end of the flat cable 30 to the scanner 14. The other end of the flat cable 30 is connected to the frame connection portion 12a of the frame 12. The frame connection portion 12a is electrically connected to a control unit (not shown).

[0019] The flat cable 30 electrically connects the reading mechanism 13 of the scanner 14 to the control unit of the frame 12. Image data acquired by the reading mechanism 13 is transmitted to the control unit. The control unit processes the image data, such as converting the image data into a digital signal and performing various corrections (such as gamma correction). The processed image data is then stored in a storage unit (not shown) such as an image memory or a hard disk drive (HDD) built into the image reading device 10. The flat cable 30 can transmit not only image data, but also power for driving the scanner 14, control signals for controlling the image reading operation by the reading mechanism 13, and the like.

[0020] The flat cable 30 is accommodated in the frame 12 in a curved state, folded back between one end and the other end. The roller mechanism 40 is disposed at the folded back portion 30a of the flat cable 30. The roller mechanism 40 has a cable roller 44 having a rotation axis parallel to the first direction R1, and the folded back portion 30a of the flat cable 30 is wound around the cable roller 44.

[0021] Since the folded-back portion 30a of the flat cable 30 is wound around the cable roller 44, the roller mechanism 40 moves together with the flat cable 30 in the second direction R2 as the scanner 14 moves back and forth.

[0022] As will be described in more detail below, the roller mechanism 40 has a tensioning member that applies tension to the flat cable 30. When the scanner 14 advances toward one side RF of the second direction R2, the roller mechanism 40 advances together with the flat cable 30 while the tensioning member applies tension to the flat cable 30 toward the other side RB of the second direction R2. When the scanner 14 retreats toward the other side RB of the second direction R2, the roller mechanism 40 retreats together with the flat cable 30 while the tensioning member applies tension to the flat cable 30 toward the other side RB of the second direction R2. Hereinafter, the direction of movement from the standby position X0 during scanning may be referred to as "advance," and the direction of movement to the standby position X0 after scanning may be referred to as "retreat."

[0023] Since the tension applying member constantly applies tension to the flat cable 30 toward the other side RB in the second direction R2, a stable tension is applied to the flat cable 30. This makes it possible to prevent the flat cable 30 from coming into contact with the contact glass 11.

[0024] The flat cable 30 and the roller mechanism 40 are disposed between the two scanner guides 26. The two scanner guides 26 are disposed parallel to the second direction R2 between the two belts 22, and support the scanner 14 and guide the scanner 14 in the second direction R2.

[0025] As shown in FIG. 2, the two scanner guides 26 are wall-like members provided to sandwich the flat cable 30 and the roller mechanism 40. A guide protrusion 27 having a smooth upward convex shape is provided at the upper end of each of the two scanner guides 26. The guide protrusion 27 is provided over the entire scanner guide 26 in the second direction R2. Meanwhile, two scanner recesses 15 shaped to fit with the guide protrusions 27 are provided at the bottom of the scanner 14. The guide protrusions 27 fit with the scanner recesses 15, allowing the scanner guide 26 to support the scanner 14 and guide the scanner 14 in the second direction R2.

[0026] The scanner 14 is reciprocated by two belts 22 parallel to the second direction R2 which move at the same speed, and is further guided by two scanner guides 26 parallel to the second direction R2, so that the scanner 14 is moved parallel to the second direction R2. Therefore, during reciprocation, the scanner 14 can move straight without tilting in any of the first direction R1, the second direction R2, and the up-down direction.

[0027] Next, the relationship between the roller mechanism 40 and the scanner guide 26 will be described with reference to Figures 1, 2, and 3. Figure 3 is a rear view showing the roller mechanism 40 and the scanner guide 26. The rear view in Figure 3 is a view of the roller mechanism 40 in Figures 1 and 2 as viewed from the other side RB in the second direction R2. In Figure 3, the second direction R2 is perpendicular to the paper surface.

[0028] A rack 32 is fixed to the frame 12. The rack 32 extends in a second direction R2 as shown in Figure 1. The upper surface of the rack 32 has teeth cut into it in a fixed pattern.

[0029] The roller mechanism 40 includes a gear portion 48. The gear portion 48 meshes with the rack 32. When the roller mechanism 40 moves in the second direction R2 together with the flat cable 30 in accordance with the reciprocating movement of the scanner 14, the gear portion 48 rotates while meshing with the rack 32.

[0030] 2 and 3, a guide groove 28 recessed in a first direction R1 is provided on the inner surface (the surface facing the flat cable 30 and the roller mechanism 40) of each of the two scanner guides 26. The guide groove 28 is provided in the scanner guide 26 along a second direction R2.

[0031] 3, guide protrusions 40a are provided on the outer surface of roller mechanism 40, protruding on both sides in first direction R1 (left-right direction in FIG. 3). Roller mechanism 40 is disposed so that guide protrusions 40a fit into guide groove 28. Because guide protrusions 40a fit into guide groove 28 provided along second direction R2, roller mechanism 40 can move straight along second direction R2 as scanner 14 moves back and forth.

[0032] Next, the structure of roller mechanism 40 will be described with reference to Fig. 4. Fig. 4 is an exploded view showing roller mechanism 40. Roller mechanism 40 has a first rotating shaft 50, a rotating shaft holder 42, a cable roller 44, a leaf spring 52, a gear plate 46, a gear portion 48, and a rotating shaft stopper 49.

[0033] The first rotating shaft 50 is a shaft body that serves as the rotating shaft of the gear unit 48. The rotating shaft holder 42 is a cover member that surrounds the first rotating shaft 50. The rotating shaft holder 42 has a cylindrical leaf spring receiving portion 45, a rod-shaped roller rotating shaft 43, and a plate-shaped holder plate 41. The leaf spring receiving portion 45 and the roller rotating shaft 43 are connected by the holder plate 41. A leaf spring fixing claw portion 56 for fixing the leaf spring 52 is provided on the inner peripheral surface of the cylindrical portion of the leaf spring receiving portion 45. Both the leaf spring receiving portion 45 and the roller rotating shaft 43 are provided so as to protrude from the same surface of the holder plate 41. Although not shown in FIG. 4, a guide protrusion 40a is provided protruding from the surface of the holder plate 41 opposite to the leaf spring receiving portion 45 and the roller rotating shaft 43.

[0034] 1 and 2 is wound around the cable roller 44. The cable roller 44 has a cylindrical shape. The cable roller 44 is attached to the roller rotation shaft 43 so as to rotate around the roller rotation shaft 43 as the rotation shaft.

[0035] Leaf spring 52 is a member formed by rolling up a plate material made of an elastic body such as metal into a spiral shape. Leaf spring 52 is incorporated into roller mechanism 40 by being placed inside the cylindrical portion of leaf spring receiving portion 45. One end of leaf spring 52 is fixed to first rotating shaft 50, and the other end of leaf spring 52 is fixed to rotating shaft holder 42. Leaf spring 52 and the parts that fix leaf spring 52 (first rotating shaft 50 and rotating shaft holder 42) form a tension applying member that applies tension to flat cable 30 (FIGS. 1 and 2).

[0036] One end of the leaf spring 52 of the tension applying member is fixed to the first rotating shaft 50, and the other end of the leaf spring 52 is fixed to the rotating shaft holder 42, so that when the first rotating shaft 50 rotates, a reaction force is accumulated in the leaf spring 52. When the reaction force of the leaf spring 52 is released, the first rotating shaft 50 rotates in the opposite direction to when the reaction force is accumulated in the leaf spring 52. The accumulation and release of the reaction force in the tension applying member is achieved passively by the leaf spring 52, so no active component such as a motor is required.

[0037] The gear plate 46 is a plate-like member that is overlapped on the rotating shaft holder 42. The cable roller 44 and the leaf spring 52 are sandwiched between the rotating shaft holder 42 and the gear plate 46. The gear plate 46 is provided with a hole through which the first rotating shaft 50 passes and a hole through which the roller rotating shaft 43 passes. A guide protrusion 40a is provided on the surface of the gear plate 46 opposite to the surface facing the rotating shaft holder 42.

[0038] A leaf spring 52 is attached to one end of the first rotating shaft 50. One end of the first rotating shaft 50 is fixed to the rotating shaft holder 42 with the leaf spring 52 attached. When the gear plate 46 is placed on the rotating shaft holder 42, the other end of the first rotating shaft 50 protrudes from the hole in the gear plate 46.

[0039] A gear portion 48 is attached to the portion of the first rotating shaft 50 that protrudes from the hole in the gear plate 46. The gear portion 48 is a gear with teeth engraved on its circumference. The gear portion 48 is attached to the first rotating shaft 50 so as to rotate together with the first rotating shaft 50. For example, a machine key (not shown) provided on the first rotating shaft 50 may be inserted into a key groove (not shown) provided near the center of rotation of the gear portion 48.

[0040] The end of the first rotating shaft 50 on the gear portion 48 side protrudes from the gear portion 48. A rotating shaft stopper 49 is attached to the end of the first rotating shaft 50 protruding from the gear portion 48. The rotating shaft stopper 49 holds the gear portion 48 between itself and the gear plate 46, thereby preventing the gear portion 48 from falling off the first rotating shaft 50.

[0041] Next, the function of the tension applying member including the leaf spring 52 (leaf spring 52, first rotating shaft 50, rotating shaft holder 42) will be described with reference to Figures 5 and 6. Figure 5 is a cross-sectional view showing how reaction force accumulates in the leaf spring 52 of the tension applying member. Figure 6 is a cross-sectional view showing how reaction force accumulated in the leaf spring 52 of the tension applying member is released.

[0042] When the scanner 14 (FIGS. 1 and 2) advances toward one side RF in the second direction R2, the leaf spring 52 is biased in a direction that applies tension to the flat cable 30 toward the other side RB in the second direction R2. As the leaf spring 52 is biased when the scanner 14 advances, a reaction force for applying tension to the flat cable 30 when the scanner 14 retreats is accumulated in the leaf spring 52 as the roller mechanism 40 advances. Also, when the scanner 14 retreats, the reaction force of the leaf spring 52 is released, so that the roller mechanism 40 can smoothly retreat while applying tension to the flat cable 30.

[0043] 5, one end 52a of the leaf spring 52 is fixed to the first rotating shaft 50, and the other end 52b of the leaf spring 52 is fixed to the rotating shaft holder 42. Specifically, a leaf spring fixing groove 58 is provided in the first rotating shaft 50, and the one end 52a of the leaf spring 52 is inserted into the leaf spring fixing groove 58, thereby fixing the one end 52a of the leaf spring 52 to the first rotating shaft 50. The other end 52b of the leaf spring 52 engages with a leaf spring fixing claw 56 provided on the inner circumferential surface of the cylindrical part of the leaf spring receiving portion 45 of the rotating shaft holder 42, thereby fixing the other end 52b of the leaf spring 52 to the rotating shaft holder 42.

[0044] When the scanner 14 (FIGS. 1 and 2) moves back and forth in the second direction R2, the flat cable 30 wound around the cable roller 44 is fed in the movement direction of the scanner 14 by the rotation of the cable roller 44. The flat cable 30 also applies a force to the cable roller 44 that moves it in the second direction R2.

[0045] Because the roller rotation shaft 43 of the cable roller 44 is part of the rotation shaft holder 42, the cable roller 44 moves in the second direction R2 together with the rotation shaft holder 42 in conjunction with the reciprocating movement of the scanner 14. While moving in the second direction R2, the cable roller 44 rotates to feed the flat cable 30 in the movement direction of the scanner 14.

[0046] When the rotating shaft holder 42 moves in the second direction R2, the first rotating shaft 50 rotates. When the rotating shaft holder 42 moves in the second direction R2 together with the flat cable 30, the gear portion 48 (FIG. 1) rotates while meshing with the rack 32 (FIG. 1), so the first rotating shaft 50, which rotates together with the gear portion 48, also rotates.

[0047] One end 52a of the leaf spring 52 is fixed to the first rotating shaft 50, so that when the first rotating shaft 50 rotates, the spiral leaf spring 52 is wound up. Fig. 5 shows how the first rotating shaft 50 rotates in the clockwise direction CW in the figure as the roller mechanism 40 moves to one side RF in the second direction R2, causing the leaf spring 52 to be wound up (contract).

[0048] Therefore, when the scanner 14 (Figure 1) moves forward toward one side RF of the second direction R2, the roller mechanism 40 moves forward toward one side RF of the second direction R2, causing the first rotating shaft 50 to rotate via the gear portion 48 (Figure 1), and a reaction force is accumulated in the leaf spring 52.

[0049] On the other hand, when the scanner 14 (FIG. 1) retreats to the other side RB in the second direction R2, the flat cable 30 no longer exerts a force directly on the cable roller 44. Then, an external force that advances the roller mechanism 40 to one side RF in the second direction R2 no longer acts on the roller mechanism 40.

[0050] 6 shows how the reaction force accumulated in the leaf spring 52 of the tension applying member is released when an external force in a direction moving the roller mechanism 40 forward toward one side RF in the second direction R2 is no longer acting on the roller mechanism 40. When an external force in a direction moving the roller mechanism 40 forward toward one side RF in the second direction R2 is no longer acting on the roller mechanism 40, the leaf spring 52 that has accumulated (contracted) reaction force (elastic force) tries to return to its expanded state (expands).

[0051] Then, the first rotating shaft 50 to which one end 52a of the leaf spring 52 is fixed rotates in the direction in which the leaf spring 52 expands (counterclockwise in FIG. 6). When the first rotating shaft 50 rotates due to the reaction force of the leaf spring 52, the gear portion 48 (FIG. 1), which rotates together with the first rotating shaft 50, rotates while meshing with the rack 32 (FIG. 1). Since the direction of rotation of the gear portion 48 due to the reaction force of the leaf spring 52 is the opposite direction to when the leaf spring 52 is wound up (FIG. 5), the roller mechanism 40 retreats to the other side RB in the second direction R2 as the gear portion 48 rotates.

[0052] Therefore, when the scanner 14 (Figure 1) retreats to the other side RB in the second direction R2, the reaction force accumulated in the leaf spring 52 rotates the gear portion 48 (Figure 1) via the first rotating shaft 50, causing the roller mechanism 40 to retreat to the other side RB in the second direction R2.

[0053] When the scanner 14 moves forward, a reaction force accumulates in the leaf spring 52, and when the scanner 14 moves backward, the roller mechanism 40 moves backward due to the reaction force of the leaf spring 52, so that the flat cable 30 is always in a state in which a stable tension is applied. The stable application of tension to the flat cable 30 prevents the flat cable 30 from coming into contact with the contact glass 11.

[0054] Next, with reference to Figures 7 and 8, it will be described how the flat cable 30 is stably tensioned whether the scanner 14 moves forward or backward. Figure 7 is a side cross-sectional view showing the scanner 14 moving forward. Figure 8 is a side cross-sectional view showing the scanner 14 moving backward.

[0055] 7, the scanner 14 advances from the standby position X0 to one side RF in the second direction R2. The cable roller 44 around which the flat cable 30 is wound advances together with the rotating shaft holder 42 in conjunction with the advancement of the scanner 14.

[0056] As the rotary shaft holder 42 advances, the entire roller mechanism 40 advances. When the roller mechanism 40 advances, the gear portion 48 of the roller mechanism 40 rotates while meshing with the rack 32. Then, as shown in FIG. 5, the leaf spring 52 is wound up and a reaction force is accumulated. Note that the magnitude of the power of the power source of the driver 16 (FIG. 1) that moves the scanner 14 is greater than the static frictional force and the kinetic frictional force of the roller mechanism 40. As the power of the power source of the driver 16 is sufficiently large, the roller mechanism 40 is pulled by the flat cable 30 and moves together with the scanner 14.

[0057] The reaction force of the leaf spring 52 acts in a direction that moves the roller mechanism 40 backward. The force in the direction that moves the roller mechanism 40 backward acts on the cable roller 44 around which the flat cable 30 is wound as a force toward the other side RB in the second direction R2. Then, a force toward the other side RB in the second direction R2 is applied from the cable roller 44 to the folded-back portion 30a of the flat cable 30. Because a force toward the other side RB is applied to the folded-back portion 30a, the flat cable 30 is in a taut state. Therefore, when the scanner 14 moves forward, the flat cable 30 is prevented from bending and coming into contact with the contact glass 11.

[0058] In Fig. 8, the scanner 14 retreats to the other side RB in the second direction R2 toward the standby position X0. When the scanner 14 retreats, as shown in Fig. 7, the reaction force accumulated in the leaf spring 52 is released, causing the first rotating shaft 50 of the roller mechanism 40 to rotate.

[0059] When the first rotating shaft 50 rotates due to the reaction force of the leaf spring 52, the gear portion 48, which rotates together with the first rotating shaft 50, rotates while meshing with the rack 32. When the gear portion 48 rotates via the first rotating shaft 50 due to the reaction force of the leaf spring 52, the roller mechanism 40 retreats to the other side RB in the second direction R2. The spring characteristics of the leaf spring 52 are set so that the retreat speed of the roller mechanism 40 caused by the reaction force accumulated in the leaf spring 52 is faster than the retreat speed of the scanner 14.

[0060] As the roller mechanism 40 retreats toward the other side RB in the second direction R2 faster than the scanner 14, a force toward the other side RB in the second direction R2 is applied to the folded-back portion 30a of the flat cable 30 via the cable roller 44 of the roller mechanism 40. Because a force toward the other side RB is applied to the folded-back portion 30a, the flat cable 30 is in a taut state. Therefore, when the scanner 14 retreats, the flat cable 30 is prevented from bending and coming into contact with the contact glass 11.

[0061] <Embodiment 2> An image forming apparatus 100 according to the second embodiment will be described with reference to Fig. 9. Fig. 9 is a diagram showing an example of the configuration of the image forming apparatus 100. In the following description, the same reference numerals are used for parts that are the same as or correspond to those in the first embodiment, and the description will be taken into consideration in common.

[0062] 1, the image forming apparatus 100 of the present embodiment is a multifunction peripheral having a copy function. In addition to the copy function, the multifunction peripheral has at least one of a printer function and a facsimile function, for example.

[0063] The image forming apparatus 100 includes a housing 61, an image forming section 62, and an image reading device 10.

[0064] The housing 61 accommodates the image forming unit 62. The housing 61 also comes into contact with the lower surface of the image reading device 10 and supports the image reading device 10 from below.

[0065] The image forming unit 62 forms a toner image on a sheet 63. The image forming unit 62 includes a photoconductor drum 621, a charging unit 622, an exposure unit 623, a developing unit 624, and a transfer unit 625.

[0066] The paper 63 is an example of a recording medium of the present invention. The paper 63 is, for example, plain paper, copy paper, recycled paper, thin paper, thick paper, glossy paper, or OHP (Overhead Projector) paper.

[0067] As described above, the image forming apparatus 100 can prevent the flat cable 30 from coming into contact with the contact glass 11.

[0068] The embodiments of the present disclosure have been described above with reference to the drawings. However, the present disclosure is not limited to the above embodiments, and can be implemented in various forms without departing from the scope of the present disclosure. The drawings are mainly schematic illustrations of each component for ease of understanding, and the thickness, length, number, spacing, etc. of each component shown in the drawings are different from the actual ones due to the convenience of drawing. In addition, the material, shape, dimensions, etc. of each component shown in the above embodiments are examples and are not particularly limited, and various modifications are possible within a range that does not substantially deviate from the configuration of the present disclosure. [Industrial Applicability]

[0069] The present disclosure provides an image reading device and an image forming device, and has industrial applicability. [Explanation of symbols]

[0070] 10 Image reader 11 Contact Glass 12 Frames 13 Reading mechanism 14. Scanner 20 Manuscripts 22 Belt 30 Flat Cable 40 Roller mechanism 62 Image forming section 100 Image forming device

Claims

1. a contact member on which a document to be read is placed; a frame supporting the contact member; a scanner having a reading mechanism extending in a first direction and reciprocating in a second direction intersecting the first direction on the lower surface side of the contact member; a flat cable connecting the scanner and the frame; a roller mechanism that moves in the second direction together with the flat cable as the scanner reciprocates; Equipped with the scanner advances from a predetermined standby position toward one side in the second direction when the document is read, and retreats toward the other side in the second direction toward the standby position after the document is read; the roller mechanism has a tension applying member that applies tension to the flat cable, When the scanner advances toward one side in the second direction, the roller mechanism advances together with the flat cable while the tension applying member applies tension to the flat cable toward the other side in the second direction, When the scanner retracts toward the other side in the second direction, the roller mechanism retracts together with the flat cable while the tension applying member applies tension to the flat cable toward the other side in the second direction.

2. The roller mechanism includes: A first rotation axis; a rotating shaft holder that surrounds the first rotating shaft and moves in accordance with the reciprocating movement of the roller mechanism; a cable roller around which the flat cable is wound; having the cable roller moves in the second direction together with the rotary shaft holder in conjunction with the reciprocating movement of the scanner, and rotates to feed the flat cable in the moving direction of the scanner; The tensioning member includes a leaf spring that is mounted to the roller mechanism; One end of the leaf spring is fixed to the first rotating shaft, 2. The image reading device according to claim 1, wherein the other end of said leaf spring is fixed to said rotary shaft holder.

3. 3. The image reading device of claim 2, wherein the leaf spring is biased in a direction to apply tension to the flat cable in the other side of the second direction when the scanner advances in the one side of the second direction.

4. a rack extending parallel to the second direction and fixed to the frame; The roller mechanism further includes a gear portion that rotates together with the first rotation shaft and meshes with the rack, When the scanner moves forward in one direction in the second direction, the roller mechanism moves forward in the one direction in the second direction, causing the first rotation shaft to rotate via the gear portion, and a reaction force is accumulated in the leaf spring, 3. The image reading device of claim 2, wherein when the scanner retracts to the other side of the second direction, the reaction force accumulated in the leaf spring rotates the gear portion via the first rotating shaft, causing the roller mechanism to retract to the other side of the second direction.

5. two belts extending parallel to the second direction and moving at the same speed to reciprocate the scanner in the second direction; two scanner guides disposed between the two belts and parallel to the second direction, supporting the scanner and guiding the scanner in the second direction; Further equipped with The image reading device of claim 1 , wherein the flat cable and the roller mechanism are disposed between the two scanner guides.

6. An image reading device according to any one of claims 1 to 5, an image forming unit for forming an image on a recording medium; An image forming apparatus comprising:

Images