Document scanning device

Abstract

The purpose is to prevent the document cover from closing even when strong force is applied to it. [Solution] The hinge 30 comprises a hinge shaft 72 provided in the housing, a hinge body 31 provided in the document cover and rotatable about the hinge shaft 72, a lock shaft 78 provided in the housing parallel to the hinge shaft 72, and a lock member 75 rotatable about the lock shaft 78. The lock member 75 has grooves 76 provided at two locations parallel to the lock shaft 78 and sandwiching the lock shaft 78. The hinge body 31 comprises a circumferential slit 34 that is narrower than the longitudinal length of the lock member 75 as viewed from the direction of the lock shaft 78 and wider than the width in the direction intersecting the longitudinal direction of the lock member 75, a first contact portion 35 provided radially outward from the lock shaft 78, and a second contact portion 36 provided radially inward from the lock shaft 78.

Description

Technical Field

[0001] The present invention relates to a document reading device.

Background Art

[0002] A flatbed document reading device provided with a document cover for pressing a document placed on a contact glass is known (for example, Patent Document 1). The document cover is hinged behind the contact glass and can be opened and closed with the hinge as a fulcrum. Also, a document reading device provided with a document conveyance device for conveying a document through a reading position of the document reading device in the document cover is known (for example, Patent Document 2).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0004] In Patent Documents 1 and 2, a configuration for holding the document cover in a state where the document cover is opened at a predetermined angle has been proposed, but there is a risk that the document cover may suddenly close when a strong force acts on the document cover. Also, when a document conveyance device is provided on the document cover, since the mass of the document conveyance device is large, a large impact may occur.

[0005] [[ID=4,2]] In consideration of the above circumstances, an object of the present invention is to prevent the document cover from closing even when a strong force acts on the document cover.

Means for Solving the Problems

[0006] To solve the above problems, the document reading device according to the present invention comprises a housing and a document cover disposed on the upper surface of the housing and coupled to the housing so as to be openable and closable via a hinge, wherein the hinge comprises a hinge shaft provided on the housing, a hinge body provided on the document cover and rotatable about the hinge shaft, a lock shaft provided on the housing parallel to the hinge shaft, and a lock member rotatable about the lock shaft, wherein the lock member has grooves provided at two locations parallel to the lock shaft and sandwiching the lock shaft, the hinge body has a circumferential slit that is narrower than the longitudinal length of the lock member as viewed from the direction of the lock axis and wider than the width in the direction intersecting the longitudinal direction of the lock member, a first contact portion provided radially outward from the lock shaft, and a second contact portion provided radially inward from the lock shaft The locking member comprises a contact portion and a locking member, wherein when the document cover is closed, the locking member is housed in the slit, and thereafter, when the document cover is opened to a first angle, the first contact portion contacts one of the grooves of the locking member that has emerged from the slit, causing the locking member to rotate in a first direction, and thereafter, when the document cover is returned to a second angle smaller than the first angle, the second contact portion engages with the other groove of the locking member, locking the document cover, and thereafter, when the document cover is opened to a first angle, the first contact portion contacts the locking member, causing the locking member to rotate further in the first direction, and thereafter, when the document cover is returned to a second angle, the second contact portion contacts the locking member, causing the locking member to rotate further in the first direction, causing the locking member to be housed in the slit, and the document cover is closed.

[0007] The groove may be formed in a V-shape.

[0008] The second contact portion may be provided at the end of the wall surface of the slit on the hinge axis side.

[0009] The aforementioned document cover may include a document transport device that transports the document via a scanning position. [Effects of the Invention]

[0010] According to the present invention, it is possible to prevent the document cover from closing even if a strong force is applied to it. [Brief explanation of the drawing]

[0011] [Figure 1] This is a perspective view showing the external appearance of an image forming system according to one embodiment of the present invention. [Figure 2] This is a schematic front view showing the configuration of a document transport device and a document reading device according to one embodiment of the present invention. [Figure 3] This is a schematic right-side view showing the configuration of a printing apparatus according to one embodiment of the present invention. [Figure 4] This is a perspective view showing a document reading device and a document transport device according to one embodiment of the present invention. [Figure 5] This is an exploded view showing a hinge related to one embodiment of the present invention. [Figure 6] This is a perspective view showing the hinge axis and lock axis related to one embodiment of the present invention. [Figure 7] This is a perspective view showing the hinge body according to one embodiment of the present invention. [Figure 8] This is a perspective view showing a locking member related to one embodiment of the present invention. [Figure 9] This is a perspective view showing the holders related to one embodiment of the present invention. [Figure 10] This is a cross-sectional view of the hinge when the document cover according to one embodiment of the present invention is closed. [Figure 11] This is a cross-sectional view showing the operation of a document cover according to one embodiment of the present invention. [Figure 12] This is a cross-sectional view showing the operation of a document cover according to one embodiment of the present invention. [Figure 13] This is a cross-sectional view showing the operation of a document cover according to one embodiment of the present invention. [Figure 14] This is a cross-sectional view showing the operation of a document cover according to one embodiment of the present invention. [Figure 15]A cross-sectional view showing the operation of the document cover according to an embodiment of the present invention. [Figure 16] A cross-sectional view showing the operation of the document cover according to an embodiment of the present invention.

Embodiments for Carrying Out the Invention

[0012] Hereinafter, an image forming system 100 according to an embodiment of the present invention will be described while referring to the drawings.

[0013] First, the overall configuration of the image forming system 100 will be described. FIG. 1 is a perspective view showing the appearance of the image forming system 100. FIG. 2 is a front view schematically showing the configurations of the document conveying device 120 and the document reading device 110. FIG. 3 is a right side view schematically showing the configuration of the printing device 1. FIG. 4 is a perspective view showing the document reading device 110 and the document conveying device 120. In each figure, U, Lo, L, R, Fr, and Rr indicate up, down, left, right, front, and rear, respectively. Note that these directions are merely defined for the convenience of explanation.

[0014] The image forming system 100 (see FIG. 1) includes a printing device 1, a document reading device 110, and a document conveying device 120. The document reading device 110 is provided above the printing device 1, and the document conveying device 120 is provided above the document reading device 110. The document conveying device 120 conveys the document G via the reading position of the document reading device 110. The document reading device 110 is a flatbed type image scanner that reads the document G and generates image data. The printing device 1 forms an image based on the image data on the sheet S.

[0015] [Printing Device] The printing device 1 (see Figure 3) comprises a rectangular parallelepiped main housing 3. Inside the lower part of the main housing 3, there is a paper feed cassette 4 in which the sheets S are stored, and a paper feed roller 5 that feeds the sheets S backward from the paper feed cassette 4. Above the paper feed cassette 4, there is an imaging device 6 that forms a toner image using an electrophotographic method, and above and behind the imaging device 6, there is a fixing device 7 that fixes the toner image onto the sheet S. Above the fixing device 7, there is an discharge roller 8 that discharges the sheet S with the toner image fixed on it, and an discharge tray 9 on which the discharged sheets S are stacked.

[0016] Inside the main housing 3, a transport path 10 is provided, which runs from the paper feed roller 5 through the image creation device 6 and the fixing device 7 to the discharge roller 8. The transport path 10 is mainly formed of plate-shaped members that face each other with gaps between them to allow the sheet S to pass through, and transport rollers 17 that grip and transport the sheet S are provided at multiple locations in the transport direction Y. A registration roller 18 is provided upstream of the image creation device 6 in the transport direction Y. To the right of the fixing device 7, a reversal transport path 10R is provided. The reversal transport path 10R branches off from the transport path 10 at a branching point located downstream of the fixing device 7 in the transport direction Y, and rejoins the transport path 10 at a confluence point located upstream of the registration roller 18 in the transport direction Y.

[0017] The imaging device 6 comprises four sets of imaging units 6U and an intermediate transfer unit 15. Each imaging unit 6U includes a photoreceptor drum 11 whose potential changes upon irradiation with light, a charging device 12 that charges the photoreceptor drum 11, an exposure device 13 that emits laser light corresponding to the image data, a developing device 14 that supplies toner to the photoreceptor drum 11, and a cleaning device 16 that removes toner remaining on the photoreceptor drum 11. The intermediate transfer unit 15 includes an endless intermediate transfer belt 15B wrapped around a drive roller 15D and a driven roller 15N, a primary transfer roller 151 that faces the inner surface of the intermediate transfer belt 15B at a position corresponding to the photoreceptor drum 11 and generates a primary transfer bias, and a secondary transfer roller 152 that faces the outer surface of the intermediate transfer belt 15B at a position corresponding to the drive roller 15D and generates a secondary transfer bias. A toner container 20 that supplies toner to the developing device 14 is connected to the developing device 14. The imaging device 6 forms a color image by superimposing four toner images onto the intermediate transfer belt 15B. The printing device 1 may be equipped with two, three, or five or more imaging units 6U.

[0018] [Document scanning device] The document scanning device 110 (see Figure 2) comprises a first carriage 81 equipped with a light source and a reflector, a second carriage 82 equipped with two reflectors, a lens 83 for imaging light, an image sensor 84 for converting the imaged light into image data, and a contact glass 85 on which the document G is placed. The first carriage 81, the second carriage 82, the lens 83, and the image sensor 84 are housed in a housing 70. The contact glass 85 is provided on the upper surface of the housing 70.

[0019] [Document transport device] The document transport device 120 (see Figures 2 and 4) is equipped with a generally rectangular document cover 40 that is formed in a flattened shape. The rear end of the document cover 40 is connected to the rear of the contact glass 85 of the document reader 110 via a hinge 30. The document cover 40 serves both to support the various parts of the document transport device 120 and to hold down the document G on the contact glass 85.

[0020] The paper feed tray 43 is located to the right of the center of the upper part of the document cover 40. The paper feed tray 43 is tilted so that the left side is lower. The output tray 44 is located below the paper feed tray 43. The output tray 44 is tilted so that the left side is lower.

[0021] The feeding section 50 includes a feeding roller 51, a driven roller 55 located to the left of the feeding roller 51, a drive roller 52 located to the left of the driven roller 55, an endless belt 56 wrapped around the drive roller 52 and the driven roller 55, and a retard roller 57 pressed against the lower surface of the lower portion of the belt 56. The feeding roller 51, driven roller 55, drive roller 52, and retard roller 57 are arranged with the front-rear direction as the axial direction.

[0022] The opening 40A is a rectangular through-hole that is elongated in the front-to-back direction and is located in the area of ​​the document cover 40 facing the first carriage 81 which is in the home position. The transport section 60 includes a curved transport path 61 that extends from the feeding section 50 through the opening 40A to the discharge roller 69, and a plurality of transport rollers 62 arranged on the transport path 61. An openable and closable cover section 46 is provided above the transport section 60. The lower left end of the cover section 46 is hinged to the left end of the document cover 40.

[0023] The control unit 2 comprises an arithmetic unit and a memory unit (not shown). The arithmetic unit is, for example, a CPU (Central Processing Unit). The memory unit includes a storage medium such as ROM (Read Only Memory), RAM (Random Access Memory), or EEPROM (Electrically Erasable Programmable Read Only Memory). The arithmetic unit performs various processes by reading and executing the control program stored in the memory unit. Note that the control unit 2 may be implemented using only integrated circuits without the use of software.

[0024] A display and operation unit 19 is provided on the front side of the document scanning device 110. The display and operation unit 19 includes a display panel, a touch panel superimposed on the display surface of the display panel, and a keypad. The control unit 2 displays a screen on the display panel showing the operation menu and status of the printing device 1 and the document scanning device 110, and controls each part of the printing device 1, the document scanning device 110, and the document transport device 120 in accordance with operations detected by the touch panel and keypad.

[0025] The basic operation of the image forming system 100 is as follows: When a user places a document G on the upper surface of the contact glass 85 and instructs the document reader 110 to read it, the first carriage 81 moves to the right at a speed V, and in conjunction with this, the second carriage 82 moves to the right at a speed V / 2. During this time, the light source of the first carriage 81 illuminates the document G, and the reflected light from the document G is reflected by the reflector of the first carriage 81 and the reflector of the second carriage 82, guided to the lens 83, and formed on the image sensor 84 to be converted into an image signal. The image signal is output to the control unit 2 of the printing device 1 and converted into image data.

[0026] Meanwhile, when a user places a document G in the paper feed tray 43 and instructs the document scanner 110 to scan, the feed roller 51 and belt 56 are driven, and the documents G are fed one by one onto the transport path 61. The documents G are transported along the transport path 61 and discharged into the output tray 44 via the opening 40A. During this time, the light source of the first carriage 81 shines light onto the documents G through the opening 40A, and the reflected light from the documents G is reflected by the reflector of the first carriage 81 and the reflector of the second carriage 82, guided to the lens 83, and formed on the image sensor 84 to be converted into an image signal. The image signal is output to the control unit 2 of the printing device 1, where it is converted into image data.

[0027] In the printing apparatus 1, the paper feed roller 5 feeds the sheet S from the paper feed cassette 4 to the transport path 10, the registration roller 18, whose rotation has stopped, corrects the orientation of the sheet S, and the registration roller 18 feeds the sheet S to the image-making apparatus 6 at a predetermined timing. In the image-making apparatus 6, the charging device 12 charges the photoreceptor drum 11 to a predetermined potential, the exposure device 13 writes a latent image to the photoreceptor drum 11, the developing device 14 develops the latent image using toner supplied from the toner container 20 to form a toner image, the primary transfer roller 151 transfers the toner image to the intermediate transfer belt 15B, and the secondary transfer roller 152 transfers the toner image to the sheet S.

[0028] Next, the fixing device 7 holds the sheet S and transports it while melting the toner image, thereby fixing the toner image to the sheet S, and the discharge roller 8 discharges the sheet S into the discharge tray 9. In the case of double-sided printing, the sheet S with the toner image fixed to the first side is sent to the transport path 10 via the inversion transport path 10R, thereby transferring the toner image to the second side.

[0029] [Hinge] Figure 5 is an exploded view showing the hinge 30. Figure 6 is a perspective view showing the hinge shaft 72 and the locking shaft 78. Figure 7 is a perspective view showing the hinge body 31. Figure 8 is a perspective view showing the locking member 75. Figure 9 is a perspective view showing the holder 90. Figure 10 is a cross-sectional view of the hinge 30 when the document cover 40 is closed.

[0030] The document cover 40 is connected to the rear end of the housing 70 so as to be able to open and close via two hinges 30 on the left and right sides (see Figure 4). The hinge 30 (see Figure 5) comprises a hinge shaft 72 provided on the housing 70, a hinge body 31 provided on the document cover 40 and rotatable about the hinge shaft 72, a lock shaft 78 provided on the housing 70 parallel to the hinge shaft 72, a lock member 75 rotatable about the lock shaft 78, and a holder 90 surrounding the hinge body 31 and the lock member 75.

[0031] [Hinge axis, locking axis] The hinge shaft 72 (see Figure 6) is located inside a recess 71 on the back of the housing 70. The hinge shaft 72 protrudes to the left from the right side wall of the recess 71. The locking shaft 78 is located below the hinge shaft 72 and slightly behind it. The locking shaft 78 protrudes to the left from the right side wall of the recess 71.

[0032] [Hinge body] The hinge body 31 (see Figures 5, 7, and 10) is disc-shaped overall. A shaft hole 33 is provided in the center of the hinge body 31, extending horizontally. The hinge shaft 72 is inserted into the shaft hole 33. When the document cover 40 is closed, the connecting portion 32 is located above the hinge shaft 72 and protrudes upward from the hinge body 31. The hinge body 31 is connected to the rear end of the lower surface of the document cover 40 (see Figure 7) via the connecting portion 32.

[0033] Here, the configuration of the hinge body 31 will be explained using the four quadrants shown in Figure 10. The x and y axes are positioned with the center 72C of the hinge axis 72 as the origin O. Hereafter, the circumferential direction means the direction along the circumference of the circle centered on the hinge axis 72, and the radial direction means the direction perpendicular to the circumference of the circle centered on the hinge axis 72.

[0034] In the first quadrant (see I in Figure 10) and the fourth quadrant (see IV in Figure 10), the hinge body 31 retains its original disc shape. In the second quadrant (see II in Figure 10), the hinge body 31 is cut out on the hinge shaft 72 side, leaving a shell-shaped first contact portion 35. The cut-out portion is called the notch 37. Of the notch 37, the portion along the boundary between the second and third quadrants is called the boundary portion 37A. The first contact portion 35 protrudes counterclockwise from near the base of the connecting portion 32. The first contact portion 35 is spaced further away from the hinge shaft 72 than the lock shaft 78. In other words, the first contact portion 35 is located radially outward from the lock shaft 78.

[0035] In the third quadrant (see III in Figure 10), the hinge body 31 is provided with a slit 34 that runs circumferentially. The slit 34 penetrates in the left-right direction. The slit 34 opens circumferentially at a position between the second and third quadrants. A second contact portion 36 is provided between the second and third quadrants. The second contact portion 36 is the intersection of the wall surface 34A of the slit 34 on the hinge shaft 72 side and the boundary portion 37A of the notch 37. The second contact portion 36 is closer to the hinge shaft 72 than the lock shaft 78. In other words, the second contact portion 36 is located radially inward from the lock shaft 78.

[0036] [Locking component] The locking member 75 (see Figure 8) has a shaft hole 77 into which the locking shaft 78 is inserted. The locking member 75 is rotatable about the locking shaft 78. The longitudinal width W1 of the locking member 75, as viewed from the direction of the locking shaft 78, is wider than the width W2 in the direction intersecting the longitudinal direction of the locking member 75. The width W of the slit 34 (the distance between the wall surface 34A on the hinge shaft 72 side of the slit 34 and the wall surface 34B opposite to wall surface 34A) is narrower than the longitudinal width W1 of the locking member 75 and wider than the width W2 in the direction intersecting the longitudinal direction of the locking member 75. Therefore, the locking member 75 can be accommodated in the slit 34 when its longitudinal direction is aligned with the circumferential direction (see Figure 10).

[0037] [holder] The holder 90 surrounds the left side and circumferential surface of the hinge body 31. The hinge shaft 72 is provided with a female thread 73 that runs in the left-right direction. A screw hole 92 is provided on the left side of the holder 90, and the holder 90 is attached to the hinge shaft 72 using a screw (not shown). The holder 90 is provided with a notch 91 to avoid interference with the connecting portion 32 when the document cover 40 is opened and closed.

[0038] [Operation] Figures 11 to 16 are cross-sectional views showing the operation of the document cover 40. In Figures 11 to 16, the rotation angle θ (counterclockwise direction is positive) of the hinge body 31 and the document cover 40 is shown with the orientation shown in Figure 10 as the reference (θ=0°). When the document cover 40 is closed (see Figure 10), the longitudinal direction of the locking member 75 is aligned with the circumferential direction, and the locking member 75 is housed in the slit 34.

[0039] As the document cover 40 is opened (as it rotates counterclockwise in Figure 10), the slit 34 moves counterclockwise relative to the locking member 75. When the document cover 40 is opened to approximately θ = 85° (see Figure 11), the locking member 75 moves out of the slit 34, and the first contact portion 35 contacts one of the grooves 76 of the locking member 75. Furthermore, when the document cover 40 is opened to approximately θ = 90° (first angle) (see Figure 12), the first contact portion 35 is positioned radially outward from the locking shaft 78, causing the first contact portion 35 to rotate the locking member 75 counterclockwise (first direction).

[0040] Next, when the document cover 40 is returned to approximately θ = 77.5° (second angle) (see Figure 13), the second contact portion 36 engages with the other groove portion 76 of the locking member 75, preventing the document cover 40 from returning any further. In other words, the document cover 40 is locked.

[0041] Next, when the document cover 40 is opened to approximately θ = 90° (first angle) (see Figure 14), the first contact portion 35 contacts one of the two surfaces of the locking member 75 that do not have a groove portion 76, causing the locking member 75 to rotate further counterclockwise.

[0042] Next, when the document cover 40 is returned to approximately θ = 77.5° (second angle) (see Figure 15), the second contact portion 36 contacts the other of the two surfaces of the locking member 75 that do not have a groove portion 76, causing the locking member 75 to rotate further counterclockwise. Then, when the document cover 40 is returned further (see Figure 16), the locking member 75 rotates further counterclockwise and is accommodated in the slit 34, and the document cover 40 is completely closed (see Figure 10).

[0043] The document reader 110 according to the embodiment described above comprises a housing 70 and a document cover 40 disposed on the upper surface of the housing 70 and coupled to the housing 70 so as to be openable and closable via a hinge 30. The hinge 30 comprises a hinge shaft 72 provided on the housing 70, a hinge body 31 provided on the document cover 40 and rotatable about the hinge shaft 72, a lock shaft 78 provided on the housing 70 parallel to the hinge shaft 72, and a lock member 75 rotatable about the lock shaft 78. The lock member 75 has grooves 76 provided at two locations parallel to the lock shaft 78 and sandwiching the lock shaft 78. The hinge body 31 has a circumferential slit 34 that is narrower than the longitudinal length of the lock member 75 as viewed from the direction of the lock shaft 78 and wider than the width in the direction intersecting the longitudinal direction of the lock member 75, a first contact portion 35 provided radially outside the lock shaft 78, and The locking member 75 is provided with a second contact portion 36 located radially inward. When the document cover 40 is closed, the locking member 75 is housed in the slit 34. Subsequently, when the document cover 40 is opened to a first angle, the first contact portion 35 contacts one groove portion 76 of the locking member 75 that has emerged from the slit 34, causing the locking member 75 to rotate in the first direction. Subsequently, when the document cover 40 is returned to a second angle smaller than the first angle, the second contact portion 36 contacts the other groove portion 76 of the locking member 75, locking the document cover 40. Subsequently, when the document cover 40 is opened to a first angle, the first contact portion 35 contacts the locking member 75, causing the locking member 75 to rotate further in the first direction. Subsequently, when the document cover 40 is returned to a second angle, the second contact portion 36 contacts the locking member 75, causing the locking member 75 to rotate further in the first direction, and the locking member 75 is housed in the slit 34, closing the document cover 40. With this configuration, the document cover 40 is locked in the open position, preventing it from closing even if a strong force is applied to it. Furthermore, the document cover 40 can be unlocked with a simple operation.

[0044] Furthermore, in the document reading device 110 according to this embodiment, the groove 76 is formed in a V shape. With this configuration, the second contact portion 36 engages with the groove 76, so the document cover 40 can be firmly locked. In addition, because the first contact portion 35 and the second contact portion 36 have high responsiveness to the groove 76, the hinge 30 operates smoothly.

[0045] Furthermore, according to the document reading device 110 of this embodiment, the second contact portion 36 is provided at the end of the wall surface 34A on the hinge shaft 72 side of the slit 34. With this configuration, the locking member 75 can be smoothly accommodated in the slit 34 when closing the document cover 40.

[0046] Furthermore, according to the document reading device 110 of this embodiment, the document cover 40 includes a document transport device 120 that transports the document G via the reading position. With this configuration, it is possible to prevent the document reading device 110 from being subjected to large impacts caused by the mass of the document transport device 120.

[0047] The above embodiment may be modified as follows.

[0048] In the above embodiment, an example was shown where the document reading device 110 is a flatbed scanner; however, the document reading device 110 may also be a contact image scanner.

[0049] In the above embodiment, an example was shown where the printing device 1 is a color printer, but the printing device 1 may also be a monochrome printer or an inkjet printer. [Explanation of Symbols]

[0050] 30 hinges 31 Hinge body 34 slits 35 1st contact part 36 Second contact part 40 Manuscript cover 70 Housing 72 Hinge axis 75 Locking member 76 Groove 78 Locking shaft 110 Document scanning device 120 Document transport device

Claims

1. Housing and The housing comprises a document cover positioned on the upper surface of the housing and connected to the housing via a hinge so as to be openable and closable, The aforementioned hinge is, A hinge shaft provided in the housing, A hinge body provided on the aforementioned document cover and rotatable about the hinge axis, A locking shaft is provided in the housing parallel to the hinge shaft, The locking member comprises a locking member that is rotatable about the locking shaft, The locking member has grooves provided at two locations parallel to the locking shaft and sandwiching the locking shaft. The aforementioned hinge body is, A slit along the circumferential direction, which is narrower than the longitudinal length of the locking member as viewed from the direction of the lock axis, and wider than the width in the direction intersecting the longitudinal direction of the locking member, A first contact portion provided radially outward from the locking shaft, It comprises a second contact portion provided radially inward from the locking shaft, When the document cover is closed, the locking member is housed in the slit. Subsequently, when the document cover is opened to the first angle, the first contact portion comes into contact with the groove portion of the locking member that has emerged from the slit, causing the locking member to rotate in the first direction. Subsequently, when the document cover is returned to a second angle smaller than the first angle, the second contact portion engages with the groove on the other side of the locking member, thereby locking the document cover. Subsequently, when the document cover is opened to the first angle, the first contact portion comes into contact with the locking member, causing the locking member to rotate further in the first direction. The document reading device is characterized in that, when the document cover is returned to the second angle, the second contact portion contacts the locking member, causing the locking member to rotate further in the first direction, the locking member to be housed in the slit, and the document cover to close.

2. The document reading device according to claim 1, characterized in that the groove portion is formed in a V-shape.

3. The document reading device according to claim 1 or 2, characterized in that the second contact portion is provided at the end of the wall surface of the slit on the hinge axis side.

4. The document reading device according to claim 1 or 2, characterized in that the document cover includes a document transport device that transports the document via a reading position.

Images