JP4913613B2 - Image reading apparatus and image forming apparatus - Google Patents

Description

  The present invention relates to an image reading apparatus configured to read a document image on a document surface by making light reflected from the document surface incident on a document surface incident on an image sensor. In particular, the present invention relates to an image reading apparatus in which light emitting elements can be easily replaced and an image forming apparatus to which the image reading apparatus is applied.

  2. Description of the Related Art Conventionally, there has been known a document reading device that is provided in an image forming apparatus such as a copying machine or a facsimile machine and is used for reading a document image, as described in Patent Document 1. The document reading device irradiates light from a light source toward a document surface, and the reflected light is incident on a photoelectric conversion element such as a CCD (charge coupled device) to convert the light into an electrical signal. Has been made. The image forming apparatus executes a predetermined image forming process based on the image information of the document image converted into the electric signal.

  As the light source, a so-called LED array is used, in which a plurality of LEDs (light emitting diodes) are mounted in a row on a predetermined substrate. The document surface is scanned by moving the LED array while irradiating the document surface with linear light rays.

The LED array is formed by arranging unit LEDs in a line on an elongated substrate made of synthetic resin (see FIG. 1 of Patent Document 1). An electrode corresponding to each LED is provided on the substrate, and this electrode and the terminal of the LED are bonded by soldering.
JP-A-3-258158

  By the way, in the image reading apparatus as shown in Patent Document 1, for example, when one LED in the LED array fails and no longer emits light, the other LEDs function normally. Nevertheless, the defective LED has to be replaced with a new one for the defective LED, which has a problem in terms of resource saving.

  In addition, since the board is usually fixed to a predetermined frame by screwing, when replacing the board, loosen the screws one by one and remove the board from the frame, and then fix the new board to the frame by screwing. In addition, there is a problem that the workability of the substrate replacement work is poor.

The present invention was made in view of such circumstances, when a defect in the light emitting element is caused to provide an image forming apparatus old and new replacement of the reading easy imager and the image reading apparatus is applied The purpose is that.

The image reading apparatus according to an aspect of the present invention includes a light source member for illuminating a document surface, and a light receiving member which is reflected light is incident from the document surface, a support member for supporting lifting the light source member, The light source member includes a substrate, a plurality of light emitting elements arranged in series on the surface side of the substrate , and a terminal for supplying power to the light emitting element, and the support member includes the light source member A mounting space for receiving the slide mounting and an electrode for supplying power to the light emitting element, and the terminal is disposed at a position facing the electrode when the light source member is mounted in the mounting space. The terminal and the electrode are connected to each other in a state where the light source member is mounted in the mounting space, and the terminal is disposed on the surface side of the substrate, and is arranged in parallel with the light emitting element. Long terminal extending parallel to the installation direction There, the support member includes a bottom plate and a pair of side plates erected from both side edges of the bottom plate, strip covering overlying said terminal extends in the direction opposite to each other from the respective upper edge portions of the pair of side plates The mounting space is formed in a C shape in an end view, the electrode is provided on the covering strip, and at least one of the pair of side plates is set at a connection position with the bottom plate. The position of the closed plate is changed between an open posture in which the mounting space is opened and a closed posture in which the mounting space is closed by rotating forward and backward about a rotation center line extending in the longitudinal direction of the bottom plate. The electrode and the terminal are connected to each other.

  According to this configuration, the terminal provided on the substrate of the light source member is connected to the electrode provided on the support member by sliding the light source member and mounting it in the mounting space of the support member. On the other hand, for example, when replacing the old light source member for replacing the light source member, the light source member is removed from the support member by sliding the old light source member out of the support member.

In addition, by sliding the substrate of the light source member into the support member while sliding on the bottom plate from the end portion of the support member having a C shape in the end view, the light source member has both side edges of the support member. While being slidably contacted with the side plate, the width direction is inserted into the support member in a positioning state, and finally the state is attached to the support member. When the light source member is mounted on the support member, the terminal provided on the surface side of the substrate contacts the electrode provided on the facing surface of the cover member, so that the light emitting element It becomes possible to supply power via As described above, by providing the electrode facing the terminal of the light source member on the cover of the support member, the electrical connection structure is simple while ensuring good operability of the light source member with respect to the support member. Become a thing.

Further, by rotating one side plate of the support member forward and backward around the rotation center line set on the side edge of the bottom plate, an open posture in which the mounting space is opened and a closed posture in which the mounting space is closed Since the posture of the light source member is changed between the two, the side plate is set to the open posture when the light source member is attached to or detached from the support member. The attachment / detachment operation with respect to the member is further improved.

  In the above configuration, it is preferable that a plurality of light source members independent of each other are mounted in the mounting space of the support member.

  According to such a configuration, since the number of light emitting elements mounted on one substrate can be reduced, a plurality of substrates can be used when one of the light emitting elements fails and the substrate must be replaced. Of these, it is only necessary to replace the one having the failed light emitting element, and accordingly, the occurrence of inconvenience such that a normal light emitting element is replaced in vain is reduced.

  The said structure WHEREIN: It is desirable for the said baseplate to provide the urging member which urges | biases the said board | substrate with which the said supporting member was mounted | worn toward the said covering strip.

  According to this configuration, since the light source member is urged toward the cover of the support member by the urging member in a state where the light source member is mounted on the support member, the light source member is provided on the cover of the terminal of the light source member. Therefore, the contact state with respect to the electrode, that is, the electrical connection state is more reliable.

  An image forming apparatus according to an aspect of the present invention includes the above-described image reading apparatus and an image forming unit that performs a predetermined image forming process based on image information of a document image read by the image reading apparatus.

  According to this configuration, the image forming apparatus can enjoy the functions and effects provided in the image reading apparatus.

  According to the image reading apparatus of the present invention, the light source member is slid and mounted in the mounting space of the support member, so that the terminal of the light source member is connected to the electrode of the support member while the light source member is slid and supported. The light source member is removed from the support member by being pulled out from the member. Therefore, when the light source member is fixed to the support member by screws or the like as in the prior art, there is a disadvantage that it takes a long time to attach and detach the light source member to the support member. Occurrence can be eliminated. Therefore, for example, when the light source member has to be replaced due to a failure of the light emitting element, the replacement can be performed quickly, thereby greatly improving the workability of the replacement work.

  In addition, since the substrate can be easily attached to and detached from the support member, even if a plurality of substrates can be mounted on the support member, the workability of the substrate replacement operation is not impaired. Accordingly, since a plurality of substrates can be supported by the support member, thereby reducing the number of light emitting elements mounted on one substrate, one of the light emitting elements fails and the substrate must be replaced. In such a case, it is only necessary to replace the defective one of the plurality of substrates with the faulty light emitting element, and there is an inconvenience that a normal light emitting element is replaced in vain. It can be reduced.

  According to the image forming apparatus of the present invention, the image forming apparatus can enjoy the operational effects provided in the image reading apparatus of the present invention.

  First, an image forming apparatus to which an image reading apparatus according to the present invention is applied will be described. FIG. 1 is an explanatory diagram showing an outline of an embodiment of an image forming apparatus to which an image reading apparatus according to the present invention is applied. In FIG. 1, the Y-Y direction is referred to as the front-rear direction, in particular, the -Y direction is referred to as the front, and the + Y direction is referred to as the rear. As shown in FIG. 1, an image forming apparatus 10 is used as a copying machine, and is provided in an apparatus main body 11 having a box shape called an in-body discharge type, and an upper portion of the apparatus main body 11. And an image reading unit 16 for reading a document image. The optical system unit 20 as an image reading apparatus according to the present invention is mounted in the image reading unit 16.

  The apparatus main body 11 is formed with the image forming unit 12 that forms an image based on the image information of the original read by the optical system unit 20 of the image reading unit 16, and is formed by the image forming unit 12 and transferred to a sheet. A fixing unit 13 that performs a fixing process on the toner image and a sheet storage unit 14 that stores a transfer sheet are provided. At the top of the apparatus main body 11, a paper discharge unit 15 including an in-body discharge tray 151 that receives the discharged paper P after fixing processing is provided.

  The image reading unit 16 includes an exterior cover 160 that houses the optical system unit 20 including the contact glass 31 on the upper surface, and the exterior cover 160 is used for pressing a document placed on the contact glass 31. A document pressing member 161 having a document mat is provided so as to be freely opened and closed. The document pressing member 161 is rotated forward and backward around the butterfly plate axis of a butterfly plate member 162 (FIG. 2) provided in a pair on the left side of the upper surface of the exterior cover 160 (back side as viewed from the position operated by the operator). The posture can be changed between a closed posture T1 in which the upper surface of the contact glass 31 is closed and an open posture T2 in which the upper surface of the contact glass 31 is opened.

  Then, the document pressing member 161 is closed at a suitable position on the upper surface of the exterior cover 160 facing the base end side (the side where the butterfly plate member 162 is provided) of the document pressing member 161. An opening / closing sensor 163 that detects that the member 161 is set to the closing posture T1 is provided. When the opening / closing sensor 163 is turned on, it is detected that the document pressing member 161 is set to the closing posture T1. On the other hand, when the open / close sensor 163 is turned off, it is detected that the document pressing member 161 is set to the open posture T2.

  The optical system unit 20 reads a document image from below through the contact glass 31 in a state where the document placed on the contact glass 31 is pressed by the document pressing member 161. The image information of the document read by the image reading unit 16 is output to the image forming unit 12 after being subjected to predetermined processing.

  At an appropriate position of the exterior cover 160, there is provided an operation panel 17 (not shown) for inputting processing conditions relating to document reading, copying processing, and the like, and an LCD serving as output means adjacent to the operation panel 17. (Liquid crystal display) 18 is provided. The operation panel 17 includes a power switch 171, a start key 172 for starting a document reading operation, a cancel key 173 for canceling the document reading operation once set, an energy saving mode selection key 174 for selecting an energy saving mode, In addition to these, a numeric keypad 175 for inputting the number of sheets to be transferred onto the paper P and the like are provided, and an image forming process is executed by operating these switches and keys. Various comments about the image forming process that is actually executed are displayed and output on the LCD 18.

  When the energy saving mode selection key 174 is pressed, the power is turned off leaving only the security power, thereby preventing unnecessary power consumption when the image forming apparatus 10 is not in operation. If the energy saving mode selection key 174 is pressed again in the state where the energy saving mode is set, the energy saving mode is canceled and the normal mode is restored.

  The image forming unit 12 forms a toner image on a sheet fed from the sheet storage unit 14, and in this embodiment, sequentially from the upstream side (rear side of the paper surface in FIG. 1) to the downstream side. A magenta unit 12M, a cyan unit 12C, a yellow unit 12Y, and a black unit 12K are provided.

  Each unit 12M, 12C, 12Y, and 12K includes a photosensitive drum 121 and a developing device 122, respectively. Each photoconductive drum 121 rotates in the counterclockwise direction in FIG. 1 and receives toner supplied from the corresponding developing device 122 to form a toner image. Each developing device 122 is replenished with toner from an unillustrated toner cartridge disposed on the right side of the apparatus main body 11 (the front side of the paper surface of FIG. 1).

  A charger 123 is provided immediately below each photoconductor drum 121, and an exposure device 124 is provided further below each charger 123. Each photosensitive drum 121 is charged uniformly by the charger 123, and laser light corresponding to each color based on the image data read by the image reading unit 16 is charged from each exposure device 124. The photosensitive drum 121 is irradiated on the peripheral surface. As a result, an electrostatic latent image is formed on the peripheral surface of each photosensitive drum 121. By supplying toner from the developing device 122 to the electrostatic latent image, a toner image is formed on the peripheral surface of the photosensitive drum 121.

  A transfer belt 125 stretched between the driving roller 125 a and the driven roller 125 b is provided at a position above the photosensitive drum 121 so as to contact the photosensitive drum 121. The transfer belt 125 is synchronized with each photoconductive drum 121 in a state where the transfer belt 125 is pressed against the circumferential surface of the photoconductive drum 121 by a transfer roller 125c provided corresponding to each photoconductive drum 121 at a predetermined interval. While rotating around the drive roller and the driven roller.

  Accordingly, when the transfer belt 125 circulates, the magenta toner image is transferred onto the surface of the transfer belt 125 by the photosensitive drum 121 of the magenta unit 12M, and then the photosensitive drum of the cyan unit 12C is placed at the same position on the transfer belt 125. The transfer of the cyan toner image by 121 is performed in the overcoating state, and then the transfer of the yellow toner image by the photosensitive drum 121 of the yellow unit 12Y to the same position of the transfer belt 125 is performed in the overcoating state. The transfer of the black toner image by the photosensitive drum 121 of the black unit 12K is performed in an overcoated state, whereby a color toner image is formed on the surface of the transfer belt 125. The color toner image formed on the surface of the transfer belt 125 is transferred to the paper P conveyed from the paper storage unit 14.

  A cleaning device 126 that removes and cleans residual toner on the peripheral surface of the photosensitive drum 121 is provided at a position in front of each photosensitive drum 121 in FIG. The peripheral surface of the photosensitive drum 121 cleaned by the cleaning device 126 goes to the charger 123 for a new charging process.

  Waste toner removed from the peripheral surface of the photosensitive drum 121 by the cleaning device 126 is collected and stored in a toner collection bottle (not shown) through a predetermined path.

  A paper conveyance path 111 extending in the vertical direction is formed at a position in front of the image forming unit 12 in FIG. The sheet conveying path 111 is provided with a pair of conveying rollers 112 at appropriate positions, and the sheet from the sheet storage unit 14 is conveyed toward the transfer belt 125 that is wound around the driving roller 125a by the driving of the conveying roller pair 112. Is done. In the sheet conveyance path 111, a second transfer roller 113 that is in contact with the surface of the transfer belt 125 is provided at a position facing the driving roller 125 a, and the sheet P being conveyed along the sheet conveyance path 111 is separated from the transfer belt 125. The toner image on the transfer belt 125 is transferred onto the paper P by being pressed and sandwiched between the second transfer roller 113.

  A transfer belt cleaning device (not shown) that removes residual toner remaining on the surface of the transfer belt 125 is provided at the rear end of the transfer belt 125 in FIG. 1, and the transfer process to the paper P is completed. The transfer belt 125 is circulated toward the next transfer process in a state where residual toner on the surface is removed and cleaned by the transfer belt cleaning device.

  The fixing unit 13 performs a fixing process on the toner image on the paper transferred by the image forming unit 12, and includes a fixing roller 131 including an energization heating element serving as a heating source, and a front side in FIG. And a pressure roller 132 disposed to face the fixing roller 131. Then, the transfer-processed paper P derived from the image forming unit 12 via the second transfer roller 113 is subjected to a heat treatment that is heated by the fixing roller 131 while being pressed between the fixing roller 131 and the pressure roller 132. The toner image is fixed, and a stable color image is formed on the paper.

  The color-printed paper P that has been subjected to the fixing process is discharged toward an in-body paper discharge tray 151 provided in the apparatus main body 11 through a paper discharge conveyance path 114 that extends from the top of the fixing unit 13. It will be.

  The paper storage unit 14 has a paper tray 141 that is detachably mounted at a position below the exposure device 124 in the apparatus main body 11. A sheet bundle is stored in the sheet tray 141. Then, the sheet P is fed out from the sheet bundle stored in the sheet tray 141 one by one by driving the pickup roller 142, and introduced into the image forming unit 12 through the sheet conveyance path 111.

  Hereinafter, the optical system unit 20 will be described with reference to FIG. 1 as needed based on FIG. FIG. 2 is a partially cutaway perspective view showing an embodiment of the optical system unit 20. In FIG. 2, the XX direction is referred to as the left-right direction and the Y-Y direction is referred to as the front-rear direction, and in particular, the -X direction is referred to as the left, the + X direction is referred to as the right, the -Y direction is referred to as the front.

  As shown in FIG. 2, the optical system unit 20 is provided with a box-shaped casing 30, and the casing 30 can be moved forward and backward in the front-rear direction, and irradiates light on the document surface. And a CCD unit 40 that collects the reflected light from the reading unit 50 and captures the reflected light as image data.

  The casing 30 has an external shape so that it can be housed in the exterior cover 160 of the image reading unit 16. A large opening having a rectangular shape is provided at the center of the upper surface of the casing 30, and a contact glass 31 for placing a document is fitted into the opening. The contact glass 31 is set at an installation position so as to face an opening provided on the upper surface of the outer cover 160 in a state where the optical system unit 20 is mounted in the outer cover 160.

  The reading unit 50 scans the document surface of the document placed on the contact glass 31 by moving backward starting from a position (home position) slightly rearward from the front end of the exterior cover 160. Then, after the scanning is completed, it moves backward and returns to the home position. The reading unit 50 includes a light source unit 60 that emits light toward the document surface, and a mirror unit that reflects light reflected from the light source unit 60 on the document surface along the optical path and guides it to the CCD unit 40. 70 and a light source member 80 attached to the light source unit 60.

  The light source unit 60 includes a first scanning frame 61 (FIG. 1) that is long in the left-right direction that runs forward and backward in the front-rear direction, and the first scanning frame that is supported by the first scanning frame 61. A light source member 80 that is elongated in the horizontal direction (that is, the left-right direction) orthogonal to the traveling direction of the body 61, and the reflected light from the original screen of the light emitted from the light source member 80 is reflected forward. 1 mirror 62.

  The light source member 80 is formed by arranging a plurality of unit LEDs (light emitting elements) 85 made of light emitting diodes (LEDs) in a predetermined frame. Since the plurality of unit LEDs 85 emit light at the same time, the light emitted from each unit LED 85 is reflected on the document surface of the document P1 through the contact glass 31. The reflected light is reflected by the first mirror 62 and travels toward the front mirror unit 70.

  The mirror unit 70 is provided in front of the light source unit 60, and a second scanning frame 71 (FIG. 1) that runs forward and backward in the front-rear direction, and a second mirror supported by the second scanning frame 71. 72 and a third mirror 73. As shown in FIG. 2, the second scanning frame 71 is formed to be long in the left-right direction, and the upper end position is set at substantially the same level as the upper end position of the light source unit 60. On the other hand, the lower end position of the second scanning frame 71 is in a positional relationship with the CCD unit 40 as shown in FIG. 1 (that is, the third mirror 73 needs to face the CCD unit 40). Because of this, the light source unit 60 protrudes downward from the lower end position.

  The second mirror 72 reflects the light reflected by the first mirror 62 downward, and the third mirror 73 is disposed below the second mirror 72 so as to face the second mirror 72. The light reflected by the mirror 72 is reflected toward the rear CCD unit 40.

  The light reflected by the third mirror 73 is incident on the CCD unit 40, where the light signal is converted into an electrical signal, and the analog amount of the electrical signal is converted into a digital amount as image information.

  The light source unit 60 and the mirror unit 70 are moved differently while being linked to each other by driving of a scanning frame body driving mechanism 51 (FIG. 1) having a driving motor (not shown) or a traveling wire stretched between predetermined pulleys. It moves at speed. Specifically, the light source unit 60 moves at twice the speed of the mirror unit 70, and even when the reading unit 50 is located at the home position shown by the solid line in FIG. 1, it is shown by the two-dot chain line in FIG. Even in the state of moving to an arbitrary position, the distance of the optical path reaching the CCD unit 40 from the first mirror 62 via the second mirror 72 and the third mirror 73 is constant, and thus the reading unit 50 is moved to any position. Even in the positioned state, the reflected light from the document surface enters the CCD unit 40 under the same conditions.

  The CCD unit 40 includes a lens unit 41 formed by combining a plurality of lenses, and a CCD (charge coupled device) 42 that functions as an image sensor disposed opposite to the rear position of the lens unit 41. Has been. The lens unit 41 is for condensing the reflected light of the light from the light source member 80 to form an image on a CCD (imaging device) 42, and the CCD 42 is for adjusting the intensity of light incident from the lens unit 41. Is converted into an electrical signal as a digital quantity.

  Then, the image information of the original P1 converted into a digital quantity by the CCD 42 is temporarily stored in a predetermined storage device, and then output to the exposure device 124 of the image forming unit 12. The exposure device 124 Based on the information, light corresponding to the document image is irradiated toward the photosensitive drum 121.

  FIG. 3 is a perspective view showing an embodiment of the light source member 80. The direction display by X and Y in FIG. 3 is the same as in FIG. 2 (X is the left-right direction (−X: leftward, + X: rightward), Y is the front-back direction (−Y: forward, + Y: rearward). )).

  As shown in FIG. 3, the light source member 80 includes a base plate 81 that is long in the left-right direction fixed to the first scanning frame body 61, and a middle plate 82 that is fixed to the upper surface of the base plate 81 with screws or the like. A pair of hard synthetic resin upper plates (support members) 83 fixed to the upper surface of the middle plate 82 with screws or the like, and a plurality of detachably mounted in series on the upper surface of each upper plate 83 A substrate 84 and a plurality of unit emitting diodes (LEDs) 85 mounted on each substrate 84 in series are provided.

  The light source member 80 is thus formed into a five-layer structure with the base plate 81, the middle plate 82, the upper plate 83, and the substrate 84. The type of the light source (for example, fluorescent light) is not changed without changing the specifications of the base plate 81. This is because the base plate 81 is made to correspond in accordance with a lamp, a halogen lamp, etc., and its versatility is ensured. In the present invention, since the unit LED 85 is used as the light source, the middle plate 82, the upper plate 83, and the substrate 84, which are members unique to the mounting of the unit LED 85, are used to mount the unit LED 85 on the base plate 81. Yes.

  The base plate 81 includes a pair of left and right leg portions 811 and a flat plate portion 812 provided between the upper edge portions of the pair of leg portions 811. The base plate 81 is attached to the light source unit 60 by screwing each leg portion 811 to an appropriate position of the first scanning frame 61. The base plate 81 is set to have a slightly shorter left and right length than a left and right length of the first scanning frame 61, thereby corresponding to the left and right length of the contact glass 31.

  The middle plate 82 is set so that the left and right length is slightly shorter than the left and right length of the flat plate portion 812 of the base plate 81, and the front and rear width dimension is set slightly shorter than that of the flat plate portion 812. The middle plate 82 is provided with a long hole 821 that is formed so as to extend in the left-right direction at the center in the front-rear direction. The middle plate 82 has a front substrate mounting portion 822 formed on the front side with the long hole 821 as a boundary, and a rear substrate mounting portion 823 formed on the rear side.

  4 and 5 are perspective views showing the upper plate 83 and the substrate 84. FIG. 4 shows a state in which the substrate 84 is separated from the upper plate 83. FIG. 5 shows a state in which the substrate 84 is mounted on the upper plate 83. Each state is shown.

  6 is a cross-sectional view taken along line VI-VI in FIG. 5. FIG. 6A is a state in which the substrate 84 is not mounted in the mounting space V of the upper plate 83, and FIG. The state where the board | substrate 84 was mounted | worn in the mounting space V of the upper plate 83 is each shown.

  7 is a cross-sectional view taken along line VII-VII in FIG. 5. FIG. 7A is a state in which the substrate 84 is not mounted in the mounting space V of the upper plate 83, and FIG. The state where the board | substrate 84 was mounted | worn in the mounting space V of the upper plate 83 is each shown. In addition, the direction display by X and Y in FIGS. 4-7 is the same as that of the case of FIG.

  4 to 7 are the same as those shown in FIG. 3 (X is the left-right direction (-X: leftward, + X: rightward), Y is the front-rear direction (-Y: forward, + Y: backward)).

  First, as shown in FIG. 4, the upper plate 83 includes a bottom plate 831 that is elongated in the left-right direction, and a pair of front and rear side plates that are erected from the front and rear edges of the bottom plate 831 over the entire length of the bottom plate 831. 832 and a pair of cover strips 833 extending in the front-rear direction, each projecting from the upper edge of each side plate 832 toward each other, and exhibiting a C shape in end view. A mounting space V (FIG. 6A) for mounting the substrate 84 is formed by a space surrounded by the bottom plate 831, the pair of side plates 832, and the pair of cover strips 833.

  The inner dimension between the pair of side plates 832 is set slightly larger than the front-rear width dimension of the substrate 84, and the inner dimension between the bottom plate 831 and the covering strip 833 is the thickness dimension of the substrate 84. It is set slightly larger. Therefore, by inserting the substrate 84 into the mounting space V from the end surface of the upper plate 83, the substrate 84 is positioned in the front-rear direction in which the front and rear side surfaces are in sliding contact with the corresponding inner surfaces of the side plates 832. 83.

  Each of the covering strips 833 is for covering a terminal 851 described later of the unit LED 85 provided on the substrate 84 in a state where the substrate 84 is mounted in the mounting space V of the upper plate 83. Each of the pair of covered strips 833 has a protruding amount from the side plate 832 such that the distance between the edge surfaces facing each other is slightly larger than the front-rear direction dimension of the unit LED 85. As a result, the unit LED 85 can irradiate the original P1 with the irradiation light without being blocked by the covering strip 833 in a state where the substrate 84 is mounted on the upper plate 83.

  In addition, a long electrode 834 is provided on the back side of each covering strip 833. These electrodes 834 are set so that the length dimension is substantially the same as or slightly shorter than the covering strip 833. An inclined guide edge surface 834 a for guiding the terminal 851 is formed at the end of each electrode 834.

  In addition, the bottom plate 831 of the upper plate 83 is provided with a plurality of urging members 835 made of leaf springs arranged in series in the left-right direction at positions opposed to the respective covering strips 833. These urging members 835 are for urging the substrate 84 mounted in the mounting space V of the upper plate 83 toward the covering strip 833.

  The urging member 835 is formed by causing the central portion of the elongated leaf spring to bulge into a mountain shape, and both ends thereof are fixed to the bottom plate 831 with screws or the like.

  Further, at both ends of the bottom plate 831, screw through holes 836 are formed at the center positions in the front-rear direction. The upper plate 83 is fixed to the middle plate 82 by inserting the screws B into the screw through holes 836 and screwing them into unillustrated screw holes formed in the middle plate 82 (FIG. 3). . Incidentally, the upper surface of the head of the screw B is formed flat, and the upper surface of the screw B and the upper surface of the bottom plate 831 are flush with each other when the screw B is screwed into the screw hole. .

  The substrate 84 has a rectangular parallelepiped shape elongated in the left-right direction. In the present embodiment, the length of the substrate 84 is set to approximately 1/3 of the length of the upper plate 83. As a result, three substrates 84 can be mounted on the upper plate 83. Further, the front-rear width dimension of the substrate 84 is set slightly shorter than the inner dimension between the pair of side plates 832 of the upper plate 83. Further, the thickness dimension of the substrate 84 is set slightly thinner than the inner dimension between the bottom plate 831 and the electrode 834.

  A plurality of unit LEDs 85 are arranged at equal pitches in the left-right direction at the center position in the front-rear direction on the upper surface of the substrate 84, and in the left-right direction before and after these unit LEDs 85. An elongated terminal 851 is provided. The pair of terminals 851 are set at positions corresponding to the electrodes 834 of the upper plate 83.

  Therefore, by pushing the board 84 into the mounting space V from the end face opening of the upper plate 83, the terminal 851 has the inclined guide edge face 834a while obtaining the biasing force from the biasing member 835 which is elastically deformed. Is mounted in the mounting space V while being in sliding contact with the lower surface of the electrode 834.

  When the substrate 84 is mounted in the mounting space V of the upper plate 83, the substrate 84 is moved upward by the biasing force of the biasing member 835, as shown in FIGS. 6B and 7B. As a result, the terminal 851 is pressed against the electrode 834. Accordingly, power from a power supply (not shown) is supplied to the unit LED 85 via the electrode 834 and the terminal 851, whereby each unit LED 85 is lit.

  As described in detail above, the optical system unit 20 as the image reading apparatus according to the present invention makes the reflected light from the light source member 80 reflected by the light source member P1 incident on the CCD 42 so that the original image of the original document P1 is displayed. It is configured to read. An upper plate 83 is provided as a support member that detachably supports the light source member 80. The light source member 80 includes a substrate 84, a plurality of unit LEDs 85 arranged on the substrate 84, and a terminal 851 that supplies power to the unit LEDs 85. On the other hand, the upper plate 83 has an electrode 834 connected to the terminal 851 in a state where the light source member 80 is mounted, and the light source member 80 is slid and mounted on the upper plate 83 so that the terminal 851 is connected to the electrode. 834 is connected.

  According to this configuration, the light source member 80 is slid and attached to the upper plate 83, whereby the terminal 851 provided on the substrate 84 of the light source member 80 is connected to the electrode 834 provided on the upper plate 83. On the other hand, for example, when replacing the old light source member 80 to replace the light source member 80, the old light source member 80 is slid and pulled out of the upper plate 83, so that the light source member 80 is removed from the upper plate 83.

  By sliding the light source member 80 and mounting it on the upper plate 83 in this way, the terminal 851 of the light source member 80 is connected to the electrode 834 of the upper plate 83, while the light source member 80 is slid and pulled out from the upper plate 83. Accordingly, since the light source member 80 is removed from the upper plate 83, when the light source member 80 is fixed to the upper plate 83 with screws or the like as in the prior art, the upper plate 83 of the light source member 80 is used. However, it is possible to eliminate the occurrence of such inconvenience. Therefore, for example, when the light source member 80 has to be replaced due to a failure of the unit LED 85, the replacement can be performed quickly, thereby greatly improving the workability of the replacement work.

  In addition, since it is easy to attach / detach the substrate 80 to / from the upper plate 83, even if a plurality of substrates 80 can be mounted on the upper plate 83, the workability of replacing the substrate 80 is not impaired. . Accordingly, since the plurality of substrates 80 are supported on the upper plate 83, and thereby the number of unit LEDs 85 mounted on one substrate 80 can be reduced, one of the unit LEDs 85 fails and the substrate 80 is removed. When it becomes necessary to replace, it is only necessary to replace the one having the defective unit LED 85 among the plurality of substrates 80, so that the normal unit LED 85 is replaced in vain. The occurrence of inconvenience can be reduced.

  In the present embodiment, a plurality of unit LEDs 85 are arranged in series on the surface side of the substrate 84, and the terminals 851 are each of the unit LEDs 85 orthogonal to the direction in which the unit LEDs 85 are arranged on the surface side of the substrate 84. The upper plate 83 is provided in the vicinity, and the upper plate 83 includes a bottom plate 831 for sliding the substrate 84, a pair of side plates 832 slidably in contact with side edges of the substrate 84 erected from both side edges of the bottom plate 831, and the pair of side plates 832. And a covering strip 833 extending in a direction facing each other and covering the terminal 851. The covering strip 833 is formed in a C shape in an end view, and the covering strip 833 has an electrode at a position facing the terminal 851. 834 is provided.

  According to this configuration, the light source member 80 is pushed into the upper plate 83 while being slid on the bottom plate 831 from the end of the upper plate 83 having a C-shape when viewed from the end. 80 is inserted into the upper plate 83 with its side edges slidingly contacting the side plates 832 of the upper plate 83 while the width direction is positioned, and is finally attached to the upper plate 83.

  In a state where the light source member 80 is mounted on the upper plate 83, the terminal 851 provided on the surface side of the substrate 84 abuts on the electrode 834 provided on the facing surface of the covering strip 833 of the upper plate 83, thereby The unit LED 85 can supply power via the electrode 834 and the terminal 851.

  Thus, by providing the electrode 834 facing the terminal 851 of the light source member 80 on the cover 833 of the upper plate 83, the electric source member 80 can be electrically attached to and detached from the upper plate 83 with good operability. A simple connection structure can be achieved.

  Further, since a plurality of light source members 80 are supported by the upper plate 83 in series, if any unit LED 85 fails and the light source member 80 must be replaced, It is sufficient to replace only the light source member 80 having the defective unit LED 85, and accordingly, it is possible to eliminate the inconvenience that the normal unit LED 85 is wasted.

  In addition, in this embodiment, since the base plate 831 is provided with a biasing member 835 that biases the base plate 84 attached to the upper plate 83 toward the strip 833, the base plate 84 is attached to the upper plate 83. In this state, the substrate 84 is urged toward the cover 833 of the upper plate 83 by the urging member 835, so that the contact with the electrode 834 provided on the cover 833 of the terminal 851 of the substrate 84 is performed. The contact state, that is, the electrical connection state can be made more reliable.

  The present invention is not limited to the above embodiment, and includes the following contents.

  (1) FIG. 8 is a sectional view showing another embodiment of the upper plate 83 ′ of the light source member 80, and FIG. 8A shows a state in which the substrate 84 is not mounted in the mounting space V. 8B shows a state in which the movable side plate 832 ′ is set in an open posture so as to insert the substrate 84 into the mounting space V, and FIG. 8C shows a state in which the substrate 84 is mounted in the mounting space V. Each state is shown. In addition, the direction display by Y in FIG. 8 is the same as that in FIG. 6 (−Y: forward, + Y: backward).

  First, as shown in FIG. 8A, in the upper plate 83 ′ of this embodiment, one side plate 832 (the front in the example shown in FIG. 8) is a movable side plate 832 ′. The movable side plate 832 'can be rotated forward and backward around a rotation center line (axial center of a hinge shaft 838 described later) extending in the longitudinal direction of the bottom plate 831 set at a connection position with the bottom plate 831. .

  Specifically, a hinge portion 837 formed by fitting the lower end portion of the movable side plate 832 ′ and the rear end portion of the bottom plate 831 is formed, and the movable side plate 832 ′ is formed in the left-right direction on the hinge portion 837. It is connected to the bottom plate 831 so as to be rotatable around a hinge shaft 838 penetrating therethrough.

  Then, the movable side plate 832 ′ changes its posture between an open posture that opens the mounting space V from the side (FIG. 8B) and a closed posture that closes the mounting space V (FIG. 8C). It is possible.

According to the upper plate 83 ′ having such a configuration, one side plate 8 of the upper plate 83 is used.
32 between the open posture in which the mounting space is opened and the closed posture in which the mounting space is closed by rotating forward and backward about the hinge shaft 838 of the hinge portion 837 set at the side edge of the bottom plate 831. Therefore, by setting the side plate 832 to the open posture when the substrate 84 is attached to or detached from the upper plate 83, the substrate 84 can be easily inserted into and removed from the mounting space. The ease of attaching / detaching operation to / from the upper plate 83 of 84 can be further improved.

  (2) In the above embodiment, a copying machine is adopted as the image forming apparatus 10 to which the optical system unit 20 is applied. However, the optical system unit 20 may be applied to a facsimile machine instead of the copying machine. .

  (3) In the above embodiment, the three substrates 84 are mounted on the upper plate 83. However, the present invention is not limited to the three substrates 84 mounted on the upper plate 83. Two may be sufficient and four or more may be sufficient.

  (4) In the above embodiment, the unit LEDs 85 are provided in the light source member 80 in two rows, but are not limited to two rows, and may be one row or three rows. It may be the above.

1 is an explanatory diagram showing an outline of an embodiment of an image forming apparatus to which an image reading apparatus according to the present invention is applied. It is a partially cutaway perspective view showing an embodiment of an optical system unit as an image reading apparatus. It is a perspective view which shows one Embodiment of a light source member. It is a perspective view which shows an upper plate and a board | substrate, and has shown the state from which the board | substrate was isolate | separated from the upper plate. It is a perspective view which shows an upper plate and a board | substrate, and has shown the state with which the board | substrate was mounted | worn to the upper plate. FIG. 6 is a cross-sectional view taken along line VI-VI in FIG. 5, where (A) shows a state in which no substrate is mounted in the upper plate mounting space, and (B) shows a state in which a substrate is mounted in the upper plate mounting space. Respectively. FIG. 7 is a cross-sectional view taken along line VII-VII in FIG. 5, where (A) shows a state in which the substrate 84 is not mounted in the upper plate mounting space, and (B) shows a substrate mounted in the upper plate mounting space. Each state is shown. It is explanatory drawing of the cross sectional view which shows other embodiment of the upper plate of a light source member, (A) is the state in which the board | substrate is not mounted | worn in mounting space, (B) inserts a board | substrate in mounting space. Accordingly, a state in which the movable side plate 832 is set to the open posture, and (C) shows a state in which the substrate is mounted in the mounting space.

DESCRIPTION OF SYMBOLS 10 Image forming apparatus 11 Apparatus main body 111 Paper conveyance path 112 Conveying roller pair 113 Transfer roller 114 Paper discharge conveyance path 12 Image forming part 12C Cyan unit 12K Black unit 12M Magenta unit 12Y Yellow unit 121 Photosensitive drum 122 Developing device 123 Charging Device 124 Exposure Device 125 Transfer Belt 125a Drive Roller 125b Driven Roller 125c Transfer Roller 126 Cleaning Device 13 Fixing Unit 131 Fixing Roller 132 Pressure Roller 14 Paper Storage Unit 141 Paper Tray 142 Pickup Roller 15 Paper Output Unit 151 Tray 16 Image reading unit 160 Exterior cover 161 Document pressing member 162 Butterfly plate member 163 Open / close sensor 17 Operation panel 171 Power switch 172 Start key 173 Cancel key 74 energy-saving mode selection key 175 numeric keypad 18 LCD
20 Optical system unit (image reading device)
30 Housing 31 Contact glass 41 Lens unit 42 CCD (Image sensor)
DESCRIPTION OF SYMBOLS 50 Reading unit 51 Scanning frame body drive mechanism 60 Light source unit 61 1st scanning frame body 62 1st mirror 70 Mirror unit 71 2nd scanning frame body 72 2nd mirror 73 3rd mirror 80 Light source member 81 Base plate 811 Leg part 812 Flat plate part 82 Middle plate 821 Long hole 822 Front substrate mounting portion 823 Rear substrate mounting portion 83, 83 ′ Upper plate (support member)
831 Bottom plate 832 Side plate 832 ′ Movable side plate 833 Covered strip 834 Electrode 834a Inclined guide edge surface 835 Energizing member 836 Screw through hole 837 Hinge portion 838 Hinge shaft 84 Substrate 85 LED (light emitting element)
851 Terminal B Screw P Paper P1 Document T1 Closed posture T2 Opened posture

Claims (4)

A light source member for irradiating the document surface with light;
A light receiving member on which reflected light from the document surface is incident;
And a support member for supporting lifting the light source member,
The light source member includes a substrate, a plurality of light emitting elements arranged in series on the surface side of the substrate , and a terminal for supplying power to the light emitting element,
The support member has a mounting space for receiving slide mounting of the light source member, and an electrode for supplying power to the light emitting element,
The terminal is disposed at a position facing the electrode when the light source member is mounted in the mounting space.
The terminal and the electrode are connected to each other in a state where the light source member is mounted in the mounting space ,
The terminal is a long terminal that is disposed on the surface side of the substrate and extends in parallel with the parallel arrangement direction of the light emitting elements ,
The support member includes a bottom plate, a pair of side plates erected from both side edges of the bottom plate, and a covering strip extending from each upper edge portion of the pair of side plates and facing the terminals. Provided, the mounting space is formed in a C shape in an end view, and the electrode is provided on the covering strip,
At least one of the pair of side plates rotates forward and backward around a rotation center line extending in the longitudinal direction of the bottom plate set at a connection position with the bottom plate, and an open posture that opens the mounting space; An image reading apparatus characterized in that a posture is changed between a closing posture for closing the mounting space, and the electrode and the terminal are connected in the closing posture . The image reading apparatus according to claim 1, wherein a plurality of the light source members independent of each other are mounted in the mounting space of the support member. The image reading apparatus according to claim 1 , wherein the bottom plate is provided with a biasing member that biases the substrate mounted on the support member toward the cover strip. An image reading apparatus according to any one of claims 1 to 3 ,
An image forming unit that performs a predetermined image forming process based on image information of a document image read by the image reading device;
An image forming apparatus comprising:

Images