JP5856790B2 - Image reading device - Google Patents

Description

  The present invention relates to an image sensor module including a light emitting diode (LED) as a light source.

  The image sensor module is roughly classified into a reduction optical system type and an equal magnification optical system type. In the reduction optical system type, a plurality of mirrors and lenses are used, and a reduced image is formed on the reading unit for reading. In the 1 × optical system type, a lens array is used, and reading is performed by forming a 1 × image on the reading unit. In any type, a light source for illuminating the reading object is required. As a light source used for an image sensor module, there is one in which a plurality of LED elements are arranged on a substrate (for example, see Patent Document 1).

  19 and 20 show an example of a light source device used in a conventional image sensor module. The light source device 90 shown in FIGS. 19 and 20 includes a pair of substrates 91 and 92, a plurality of LED elements 911 arranged on the substrate 91, and a plurality of LED elements 921 arranged on the substrate 92. . The pair of substrates 91 and 92 extend long along the main scanning direction of the image sensor module in which the light source device 90 is incorporated, and the plurality of LED elements 911 and 921 are arranged along the main scanning direction.

  As shown in FIG. 19, the light source device 90 is configured to illuminate a predetermined position on the lower surface 941 of the reading target 94 placed on the document placing table 93 from the left and right in the drawing. By illuminating the reading target 94 from the left and right in the drawing, for example, even when the reading target 94 has a wrinkle or the like, a shadow is less likely to occur.

  However, in such a light source device 90, unevenness in brightness may occur depending on the pitch of the plurality of LED elements 911, 912 in the main scanning direction x. Such unevenness of brightness may cause unevenness of the read image when the reading object 94 is lifted from the document table 93.

JP 2011-66799 A

  The present invention has been conceived under the circumstances described above, and an object of the present invention is to provide an image sensor module including a light source that is less likely to cause unevenness in brightness.

  The image sensor module provided by the first aspect of the present invention includes light receiving means having a plurality of light receiving portions arranged in the main scanning direction, and a plurality of first light emitting elements arranged in the main scanning direction. A first light emitting means for illuminating a reading object located on one side in a first direction orthogonal to the main scanning direction and the sub scanning direction; and a plurality of second light emitting elements arranged in the main scanning direction. And a second light emitting means for illuminating a reading object located on one side in the first direction, and a case for housing the first light emitting means and the second light emitting means. The plurality of first light emitting elements include a pair of first light emitting elements adjacent to each other in the main scanning direction at a first interval, and the plurality of second light emitting elements are arranged in the main scanning direction. Arranged at a position between the pair of first light emitting elements. Characterized in that it includes a second light emitting elements.

  In a preferred embodiment of the present invention, the first light emitting means has a first substrate extending long along the main scanning direction, and the plurality of first light emitting elements are the first substrate. The second light-emitting means has a second substrate that extends long along the main scanning direction and is disposed on one side of the first substrate in the sub-scanning direction; The plurality of second light emitting elements are mounted on the second substrate.

  In a preferred first embodiment of the present invention, of the plurality of first light emitting elements, the first light emitting element located at one end in the main scanning direction is the main scanning of the first substrate. The second light emitting element located at one end in the main scanning direction among the plurality of second light emitting elements is installed at a position away from the one end in the direction by a first distance. The second substrate is disposed at a position away from one end in the main scanning direction by a second distance shorter than the first distance.

  More preferably, among the plurality of first light emitting elements, the first light emitting element located at the other end in the main scanning direction is the first light emitting element from the other end in the main scanning direction of the first substrate. Of the plurality of second light emitting elements, the second light emitting element located at the other end in the main scanning direction is the main scanning of the second substrate. It is installed at a position away from the other end in the direction by the first distance.

  In a preferred second embodiment of the present invention, the case is formed with a first recess for accommodating the first substrate and a second recess for accommodating the second substrate, Both ends of the first recess and the second recess in the main scanning direction are at the same position, and one end of the first substrate in the main scanning direction and the first recess in the main scanning direction. A first position adjusting member provided between one end portion, one end portion in the main scanning direction of the second substrate, and one end portion in the main scanning direction of the second recess; And a second position adjustment member provided between the first position adjustment member and the first position adjustment member. The second position adjustment member is longer than the second position adjustment member in the main scanning direction.

  More preferably, the additional first position adjusting member provided between the other end of the first substrate in the main scanning direction and the other end of the first recess in the main scanning direction. And an additional second position adjusting member provided between an end portion on the other side in the main scanning direction of the second substrate and an end portion on the other side in the main scanning direction of the second recess, The additional first position adjusting member is formed shorter in the main scanning direction than the additional second position adjusting member.

  In a preferred third embodiment of the present invention, the case is formed with a first recess for accommodating the first substrate and a second recess for accommodating the second substrate, Both ends of the first recess and the second recess in the main scanning direction are at the same position, and one end of the first substrate in the main scanning direction and the first recess in the main scanning direction. A first position adjusting member provided between one end portion, the other end portion in the main scanning direction of the second substrate, and the other end portion in the main scanning direction of the second recess. And a second position adjusting member provided between the first substrate and the other end in the main scanning direction of the first substrate is the other side in the main scanning direction of the first recess. In the main scanning direction of the second substrate. One side of the end portion is in contact with the end of one side in the main scanning direction of the second recess.

  In a fourth preferred embodiment of the present invention, the case is formed with a first recess for accommodating the first substrate and a second recess for accommodating the second substrate. One end of the first recess in the main scanning direction is located on the other side in the main scanning direction than the one end of the second recess in the main scanning direction.

  Preferably, the other end of the first recess in the main scanning direction is located on the other side in the main scanning direction than the other end of the second recess in the main scanning direction.

  In a more preferred embodiment of the present invention, a metal first support member housed in the first recess and a metal second support member housed in the second recess are further provided. The first substrate is supported by the first support member, and the second substrate is supported by the second support member.

  More preferably, the first support member has a first inclined surface that is displaced toward the other side in the sub-scanning direction toward one side in the first direction, and the first substrate is the first side. The second support member has a second inclined surface that is displaced toward one side in the sub-scanning direction as one side in the first direction, and the second substrate is It is supported by the second slope.

  In a preferred embodiment of the present invention, the apparatus further comprises: a reading substrate that supports the light receiving means; and a lens array that extends long in the main scanning direction and is disposed on one side of the reading substrate in the first direction. The lens array is sandwiched between the first substrate and the second substrate in the sub-scanning direction.

  In a preferred example, the plurality of first light emitting elements and the plurality of second light emitting elements are arranged at every first interval.

  In the above-described preferred example, each of the second light emitting elements is separated from any one of the plurality of first light emitting elements by a half of the first interval in the main scanning direction.

  In a preferred embodiment of the present invention, in the first direction, a transparent cover disposed on one side of the first light emitting means and the second light emitting means, and the first direction of the transparent cover. A light diffusing member that covers the other surface of the lens so as to expose a region overlapping the lens array when viewed in the first direction.

  In another preferred embodiment of the present invention, a reading substrate for supporting the light receiving means, a lens disposed on an optical path between the reading object and the light receiving means, the reading object and the lens A mirror disposed on the optical path between the first object and the second substrate in the sub-scanning direction. It is sandwiched.

  According to such a configuration, the first light emitting means tends to have uneven brightness according to the pitch of the plurality of first light emitting elements. That is, in the main scanning direction, a portion where the first light emitting element is present is relatively bright, and a portion between a pair of adjacent first light emitting elements is relatively dark. Similarly, also in the second light emitting means, a portion where the second light emitting element is present is relatively bright, and a portion between a pair of adjacent second light emitting elements is relatively dark. In the configuration of the present invention, the second light emitting element is disposed so as to be sandwiched between a pair of adjacent first light emitting elements in the main scanning direction. For this reason, in the part where the first light emitting means becomes relatively dark, the second light emitting means becomes relatively bright, and the unevenness in brightness is offset. Therefore, the image sensor module according to the present invention can perform reading by illuminating the reading object with less uneven brightness by the first light emitting means and the second light emitting means.

  An image sensor module provided by the second aspect of the present invention includes a light receiving unit having a plurality of light receiving units arranged in the main scanning direction, and one side in a first direction orthogonal to the main scanning direction and the sub scanning direction. A first light emitting means for illuminating a reading object located at a position, and a reading object located on one side of the first light emitting means in the sub-scanning direction and located on one side in the first direction. Second light emitting means, and a case for housing the first light emitting means and the second light emitting means, wherein the first light emitting means extends first in the main scanning direction. The first light guide has a plurality of first grooves arranged in the main scanning direction, and the second light emitting means is long in the main scanning direction. A second light guide extending, and the second light guide. The body has a plurality of second groove portions arranged in the main scanning direction, and the plurality of first groove portions are adjacent to each other in the main scanning direction at a first interval. The plurality of second groove portions include a second groove portion disposed at a position sandwiched between the pair of first groove portions in the main scanning direction.

  In a preferred embodiment of the second aspect of the present invention, the case is formed with a first recess for accommodating the first light emitting means and a second recess for accommodating the second light emitting means. The both ends of the first recess and the second recess in the main scanning direction are at the same position, and the first light emitting means has a pair of sandwiching the first light guide in the main scanning direction. The second light emitting means has a pair of second light emitting parts sandwiching the second light guide in the main scanning direction.

  In a preferred first embodiment of the second aspect of the present invention, the first light emitting unit on one side in the main scanning direction among the pair of first light emitting units is the first light emitting unit in the main scanning direction. It is formed longer than the second light emitting part on one side in the main scanning direction among the pair of second light emitting parts.

  More preferably, the first light emitting unit on the other side in the main scanning direction of the pair of first light emitting units is the other of the pair of second light emitting units in the main scanning direction in the main scanning direction. It is shorter than the second light emitting part on the side.

  In a second preferred embodiment of the second aspect of the present invention, one end in the main scanning direction of the first light emitting unit on the one side in the main scanning direction among the pair of first light emitting units. And a first position adjusting member provided between the first concave portion and one end portion in the main scanning direction of the first recess, and one side in the main scanning direction of the pair of second light emitting units. A second position adjusting member provided between one end of the second light emitting unit in the main scanning direction and one end of the second recess in the main scanning direction. The first position adjustment member is formed longer in the main scanning direction than the second position adjustment member.

  More preferably, the other end in the main scanning direction of the first light emitting unit on the other side in the main scanning direction of the pair of first light emitting units and the other in the main scanning direction of the first recess. An additional first position adjusting member provided between the second light emitting unit and the other light emitting unit on the other side of the pair of second light emitting units in the main scanning direction. And an additional second position adjustment member provided between the end of the second recess and the other end of the second recess in the main scanning direction, and the additional first position adjustment The member is formed shorter in the main scanning direction than the additional second position adjusting member.

  In a third preferred embodiment of the second aspect of the present invention, one end in the main scanning direction of the first light emitting unit on the one side in the main scanning direction among the pair of first light emitting units. And a first position adjusting member provided between the first recess and one end of the first recess in the main scanning direction, and the other of the pair of second light emitting units in the main scanning direction. A second position adjusting member provided between the other end of the second light emitting unit in the main scanning direction and the other end of the second recess in the main scanning direction; The other end of the first light emitting unit in the main scanning direction of the first light emitting unit in the main scanning direction is the other end of the first recess in the main scanning direction. A second light emitting portion on one side of the second light emitting section in the main scanning direction. One side of the end portion in the main scanning direction of the parts are in contact with the end of one side in the main scanning direction of the second recess.

  In a fourth preferred embodiment of the second aspect of the present invention, the case has a first recess for accommodating the first light emitting means and a second recess for accommodating the second light emitting means. The one end of the first recess in the main scanning direction is located on the other side in the main scanning direction than the one end of the second recess in the main scanning direction. Yes.

  Preferably, the other end of the first recess in the main scanning direction is located on the other side in the main scanning direction than the other end of the second recess in the main scanning direction.

  Other features and advantages of the present invention will become more apparent from the detailed description given below with reference to the accompanying drawings.

It is a principal part top view which shows the image sensor module based on 1st Embodiment of this invention. It is a principal part enlarged plan view which shows the image sensor module of FIG. It is sectional drawing which follows the III-III line of FIG. It is a principal part top view which shows sensor IC of the image sensor module of FIG. It is a principal part expanded sectional view in alignment with the VV line of FIG. It is a principal part enlarged plan view which shows the image sensor module based on 2nd Embodiment of this invention. It is a principal part enlarged plan view which shows the image sensor module based on 3rd Embodiment of this invention. It is a principal part enlarged plan view which shows the image sensor module based on 4th Embodiment of this invention. It is a schematic block diagram which shows the image sensor module based on 5th Embodiment of this invention. It is a principal part enlarged plan view of the image sensor module shown in FIG. It is a principal part top view which shows the image sensor module based on 6th Embodiment of this invention. It is a principal part enlarged plan view of the image sensor module shown in FIG. It is sectional drawing which follows the XIII-XIII line | wire of FIG. It is a figure for demonstrating the light guide shown in FIG. It is a bottom view for demonstrating the principal part of the image sensor module shown in FIG. It is a principal part top view which shows the modification of the image sensor module shown in FIG. It is a principal part top view which shows the modification of the image sensor module shown in FIG. It is a principal part top view which shows the modification of the image sensor module shown in FIG. It is sectional drawing which shows an example of the conventional image sensor module. It is a top view which shows the principal part of the image sensor module shown in FIG.

  Hereinafter, preferred embodiments of the present invention will be specifically described with reference to the drawings.

  1 to 3 show an image sensor module according to a first embodiment of the present invention. The image sensor module 101 of this embodiment is of the same magnification optical system type, and includes a case 200, a reading substrate 300, a first light emitting means 410, a second light emitting means 420, a first support member 510, and a second. Support member 520, a plurality of spacers 530, a lens unit 600, a sensor IC 700, a transparent cover 800, a first light diffusing member 810, and a second light diffusing member 820. For simplification, the transparent cover 800, the first light diffusing member 810, and the second light diffusing member 820 are omitted in FIGS. The image sensor module 101 is used, for example, for reading a relatively large document 890 of A3 size.

  The case 200 constitutes the outer shape of the image sensor module 101 and accommodates other components. The case 200 extends long in the main scanning direction x, and has a cross-sectional shape defined by the sub scanning direction y and the thickness direction z (a direction perpendicular to both the main scanning direction x and the sub scanning direction y). Is generally rectangular. The thickness direction z corresponds to the first direction referred to in the present invention. Examples of the material of the case 200 include aluminum.

  As shown in FIG. 1, a first recess 210, a second recess 220, and a groove 230 are formed in the case 200. The first recess 210, the second recess 220, and the groove 230 each extend long in the main scanning direction x. As shown in FIG. 3, in the sub-scanning direction y, the first recess 210 is located on the right side of the groove 230 in the drawing, and the second recess 220 is located on the left side of the groove 230 in the drawing. In the present embodiment, both ends of the first recess 210 and the second recess 220 are at the same position in the main scanning direction x.

  As shown in FIG. 3, the case 200 is formed with an opening 240 that opens upward in the figure in the thickness direction z and an opening 250 that opens downward in the figure in the thickness direction z. A transparent cover 800 is fitted into the opening 240, and the reading substrate 300 is fitted into the opening 250.

  The reading substrate 300 has a long rectangular shape in which the main scanning direction x is the longitudinal direction and the sub-scanning direction y is the width direction, and is made of, for example, glass epoxy resin or ceramics. A sensor IC 700 is mounted on the substrate 300. Further, the first light emitting means 410 and the second light emitting means 420 are connected.

  As shown in FIG. 3, the first light emitting means 410 and the second light emitting means 420 are configured to illuminate a reading object 890 positioned on the upper side in the figure in the thickness direction z. In the present embodiment, the first light emitting means 410 and the second light emitting means 420 are separated with the lens array 600 interposed therebetween in the sub-scanning direction y. The first light emitting means 410 illuminates the band-like region 800A located right above the lens array 600 of the reading object 890 in FIG. 3, from the right side in the figure, and the second light emitting means 420 is on the left side in the figure. Illuminate from. The length dimension of the band-shaped region 800A in the sub-scanning direction y is, for example, about 2 mm.

  The first light emitting means 410 includes a first substrate 411 and a plurality of LED modules 412 arranged in the main scanning direction x. The first substrate 411 is an insulating substrate made of, for example, glass epoxy resin or ceramics, and has a long rectangular shape that extends long in the main scanning direction x. A wiring pattern (not shown) for lighting the plurality of LED modules 412 is formed on the first substrate 411. The first substrate 411 is supported by the first support member 510.

  The LED module 412 corresponds to the first light emitting element referred to in the present invention, and is configured to emit white light. Each LED module 412 includes, for example, an LED chip that emits blue light and a fluorescent resin that covers the LED chip. The fluorescent resin emits yellow light when excited by, for example, blue light from the LED chip 40. White light is emitted from the LED module 412 by mixing blue light from the LED chip and yellow light from the fluorescent material. Instead of the fluorescent material, a fluorescent material that emits red light when excited by blue light and a fluorescent material that emits green light may be used in combination.

  As shown in FIG. 2, the plurality of LED modules 412 are arranged on the first substrate 411 at a constant interval dP. Among the plurality of LED modules 412, the LED module 412a located at the right end in FIG. 2 in the main scanning direction x is at a position separated from the right end in FIG. 2 of the first substrate 411 by the first distance dA. is set up. Among the plurality of LED modules 412, the LED module 412b located at the left end in FIG. 2 in the main scanning direction x is at a position away from the left end of the first substrate 411 in FIG. 2 by a second distance dB. is set up. In the present embodiment, the distance dB is shorter than the distance dA by half the distance dP.

  The second light emitting means 420 includes a second substrate 421 and a plurality of LED modules 422 arranged in the main scanning direction x. The second substrate 421 is an insulating substrate made of, for example, glass epoxy resin or ceramics, and has a long rectangular shape that extends long in the main scanning direction x. In the present embodiment, the first substrate 411 and the second substrate 421 have the same dimensions in the main scanning direction x. A wiring pattern (not shown) for lighting the plurality of LED modules 422 is formed on the second substrate 421. The second substrate 421 is supported by the second support member 520.

  The LED module 422 corresponds to the second light emitting element referred to in the present invention, and is configured to emit white light. Each LED module 422 includes an LED chip that emits blue light and a fluorescent resin that covers the LED chip, similarly to each LED module 412.

  As shown in FIG. 2, the plurality of LED modules 422 are arranged on the second substrate 421 at a constant interval dP. Among the plurality of LED modules 422, the LED module 422a located at the right end in FIG. 2 in the main scanning direction x is at a position away from the right end in FIG. 2 of the second substrate 421 by a second distance dB. is set up. Among the plurality of LED modules 422, the LED module 422b located at the end on the left side in FIG. 2 in the main scanning direction x is located at a position away from the left end in FIG. is set up.

  Specifically, the distance dP is, for example, 5 to 20 mm, the distance dA is, for example, 2 to 15 mm, and the distance dB is, for example, 1 to 10 mm.

  According to the above configuration, as shown in FIG. 2, the row of the plurality of LED modules 422 is arranged at a position shifted from the row of the plurality of LED modules 412 by half the distance dP. It will be. That is, each LED module 422 is separated from any one of the plurality of LED modules 412 by a distance that is half the distance dP. In other words, the LED module 422 is arranged at a position sandwiched between a pair of adjacent LED modules 412.

  The first support member 510 is made of metal and is formed to extend long in the main scanning direction x. In the present embodiment, the first support member 510 is formed so that the length in the main scanning direction x is the same as that of the first substrate 411. As a material of the first support member 510, for example, aluminum can be used. As shown in FIG. 3, the first support member 510 has a first slope 511 that is displaced to the right side in the sub-scanning direction y toward the upper side in the z direction. The first substrate 411 is fixed to the first inclined surface 511.

  As shown in FIG. 3, the lower right portion of the first support member 510 in the drawing is recessed. For example, a cable for connecting the wiring pattern provided on the first substrate 411 and the reading substrate 300 is accommodated in the recess.

  The second support member 520 is made of metal and is formed to extend long in the main scanning direction x. In the present embodiment, the second support member 520 is formed so that the length in the main scanning direction x is the same as that of the first substrate 411 and the second substrate 421. As a material of the second support member 520, for example, aluminum can be used. As shown in FIG. 3, the second support member 520 has a second inclined surface 521 that is displaced to the left side in the sub-scanning direction y toward the upper side in the z direction. The second substrate 421 is fixed to the second inclined surface 521.

  As shown in FIG. 2, spacers 530 are disposed on both sides of the first support member 510 and the second support member 520 in the main scanning direction x. The four spacers 530 in this embodiment are the same. One of the four spacers 530 includes a first support member 510 and an end of the first substrate 411 in the main scanning direction x on the right side in FIG. 2 and the first recess 210 in the main scanning direction x. 2 is provided between the middle and the right end. The other is that the first support member 510 and the first substrate 411 in the main scanning direction x in the main scanning direction x and the left end in FIG. 2 and the first recess 210 in the main scanning direction x in FIG. It is provided between the end on the middle left side. These spacers 530 are provided to fix the positions of the first support member 510 and the first substrate 411 in the main scanning direction x in the first recess 210. Another one is that the second support member 520 and the second substrate 421 have an end on the right side in FIG. 2 in the main scanning direction x and the second recess 220 in FIG. 2 in the main scanning direction x. It is provided between the ends on the middle right side. Another one is the end of the second support member 520 and the second substrate 421 on the left side in FIG. 2 in the main scanning direction x and the second recess 220 in FIG. 2 in the main scanning direction x. It is provided between the end on the middle left side. The spacers 530 are provided to fix the positions of the second support member 520 and the second substrate 421 in the main scanning direction x in the second recess 220. In the present embodiment, as shown in FIG. 2, the first substrate 411 and the second substrate 421 are arranged at the same position in the main scanning direction x.

  As shown in FIG. 3, the lower left portion of the second support member 520 in the figure is recessed. For example, a cable for connecting the wiring pattern provided on the second substrate 421 and the reading substrate 300 is accommodated in the recess.

  The lens unit 600 condenses the light traveling in the thickness direction z from the reading object 890 on the sensor IC 700 at the same erect magnification. The lens unit 600 includes a plurality of lenses 610 and a lens holder 620. The plurality of lenses 610 have their optical axes along the thickness direction z and are arranged in the main scanning direction x. The lens holder 620 is made of an opaque resin and holds a plurality of lenses 610.

  The sensor IC 700 is an example of the light receiving means referred to in the present invention, and is mounted on the reading substrate 300. As shown in FIGS. 4 and 5, the sensor IC 700 includes a plurality of light receiving units 710 and a plurality of filters 720.

  The plurality of filters 720 includes a first filter 721, a second filter 722, and a third filter 723. Each of the first to third filters 721, 722, and 723 has a strip shape extending in the main scanning direction x, and is arranged in parallel to each other with an interval in the sub-scanning direction y. In the present embodiment, the first filter 721 selectively transmits red light and attenuates visible light and ultraviolet light other than red light. The second filter 722 selectively transmits green light and attenuates visible light and ultraviolet light other than green light. The third filter 723 selectively transmits blue light and attenuates visible light and ultraviolet light other than blue light.

  The plurality of light receiving units 710 are divided into a first group 711, a second group 712, and a third group 713. The first to third groups 711, 712, and 713 are arranged along the main scanning direction x, for example, every 43 μm. The first to third groups 711, 712, and 713 are arranged in parallel to each other at a distance of, for example, 43 μm in the sub-scanning direction y. The first group 711 is covered with the first filter 721, the second group 712 is covered with the second filter 722, and the third group 713 is covered with the third filter 723.

  The light collected by the lens unit 600 is transmitted through the first to third filters 721, 722, 723 and received by the first to third groups 711, 712, 713. The first group 711 receives the red component of the collected light, the second group 712 receives the green component of the collected light, and the third group 713 receives the blue component of the collected light. Is received. The sensor IC 700 has a photoelectric conversion function of outputting an electric signal having a strength corresponding to the intensity of received light from the pad 730 for each of the first group 711, the second group 712, and the third group 713, for example.

  The transparent cover 800 is made of, for example, glass or acrylic resin, and is formed in a plate shape that extends long in the main scanning direction x. The transparent cover 800 transmits light from the first light emitting means 410 and the second light emitting means 420.

  The first light diffusing member 810 and the second light diffusing member 820 are members that diffuse and transmit light from the first light emitting means 410 and the second light emitting means 420. The first light diffusing member 810 and the second light diffusing member 820 are, for example, white resin sheets, and are attached to the lower surface in FIG. 3 of the transparent cover 800 over substantially the entire length in the main scanning direction x. ing. As shown in FIG. 3, the first diffusion member 810 is provided on the right side in the drawing with respect to the band-shaped region 800 </ b> A so as to expose the band-shaped region 800 </ b> A. An end on the right side in the drawing of the first diffusion member 810 is, for example, substantially the same position as an end on the right side in the drawing of the first substrate 411. Further, the second light diffusion member 820 is provided on the left side in the drawing with respect to the band-shaped region 800A so as to expose the band-shaped region 800A. An end on the left side of the second diffusion member 820 in the drawing is, for example, substantially the same position as an end on the left side of the second substrate 421 in the drawing. With this configuration, light traveling from the first light emitting unit 410 toward the reading object 890 passes through the first light diffusing member 810, and light traveling from the second light emitting unit 420 toward the reading object 890 is Passes through the second light diffusion member 820. In addition, it is possible to prevent light reflected by the reading object 890 and traveling toward the lens array 600 from being scattered by the first light diffusion member 810 or the second light diffusion member 820.

  Next, the operation of the image sensor module 101 will be described.

  In the first light emitting means 410, a plurality of LED modules 412 are arranged at an equal pitch (interval dP), and there is a tendency that lightness and darkness corresponding to this pitch can be achieved. That is, it tends to be relatively dark in the portion between the plurality of LED modules 412. This tendency is also observed in the second light emitting means 420. According to this embodiment, as shown in FIG. 2, the row of the plurality of LED modules 412 and the row of the plurality of LED modules 422 are shifted by a distance that is half the distance dP. For this reason, the plurality of LED modules 422 are disposed at positions where the plurality of LED modules 412 are not disposed in the main scanning direction x, and the second light emitting unit 410 is relatively dark when the second light emitting unit 410 is relatively dark. The light emitting means 420 becomes relatively bright. Therefore, in the image sensor module 101, the first light emitting means 410 and the second light emitting means 420 are configured to cancel each other's brightness unevenness, so that the reading object 890 has a brightness with less unevenness. Illuminated for reading.

  Furthermore, in this embodiment, a first light diffusing member 810 and a second light diffusing member 820 are provided, and light from the first light emitting means 410 and the second light emitting means 420 is supplied to the reading object 890. It will spread to some extent before it arrives. For this reason, the light from the first light-emitting means 410 and the second light-emitting means 420 is easily blurred in brightness, and illumination with less unevenness can be obtained.

  Furthermore, in this embodiment, the first support member 510, the second support member 520, and the case 200 are made of metal, which is desirable for cooling the heat generated by the plurality of LED modules 412 and 422 during driving. It has a configuration.

  6 to 18 show another embodiment of the present invention. In these drawings, the same or similar elements as those in the above embodiment are denoted by the same reference numerals as those in the above embodiment.

  FIG. 6 shows an image sensor module according to the second embodiment of the present invention. The image sensor module 102 of the present embodiment is different from the image sensor module 101 in that it includes two types of spacers 531 and 532 instead of the four spacers 530. Further, the first light emitting means 410 and the second light emitting means 420 are also different from the image sensor module 101 in the following points.

  In the present embodiment, as shown in FIG. 6, the LED module 412 a is installed at a position separated by a distance dB from the right end of the first substrate 411 in the main scanning direction x in the drawing. Further, the LED module 422b is installed at a position separated by a distance dB from the left end in the main scanning direction x of the second substrate 421 in the drawing. That is, in the present embodiment, the arrangement of the plurality of LED modules 412 on the first substrate 411 and the arrangement of the plurality of LED modules 422 on the second substrate 421 are the same. For this reason, in this embodiment, the 1st light emission means 410 and the 2nd light emission means 420 are compatible, and can share a common component.

  As shown in FIG. 6, the spacer 531 is formed to be longer than the spacer 532 by half the distance dP in the main scanning direction x. One of the spacers 531 includes an end on the right side in FIG. 6 in the main scanning direction x of the first substrate 411 and an end on the right side in FIG. 6 in the main scanning direction x of the first recess 210. It is provided between. The spacer 531 corresponds to the first position adjusting member referred to in the present invention.

  One of the spacers 532 includes an end on the right side in FIG. 6 in the main scanning direction x of the second substrate 421 and an end on the right side in FIG. 6 in the main scanning direction x of the second recess 220. It is provided between. The spacer 532 corresponds to the second position adjusting member referred to in the present invention.

  Further, the other spacer 531 has an end on the left side in FIG. 6 in the main scanning direction x of the second substrate 421 and a left side in FIG. 6 in the main scanning direction x of the second recess 220. It is provided between the ends. The spacer 531 corresponds to an additional second position adjusting member referred to in the present invention.

  Further, one of the spacers 532 includes an end on the left side in FIG. 6 in the main scanning direction x of the first substrate 411 and an end on the left side in FIG. 6 in the main scanning direction x of the first recess 210. Between the two parts. The spacer 532 corresponds to an additional first position adjusting member referred to in the present invention.

  With these spacers 531 and 532, as shown in FIG. 6, the first substrate 411 and the second substrate 421 are disposed at positions shifted by a half length of the interval dP in the main scanning direction x. Will be. For this reason, the row of the LED modules 412 and the row of the LED modules 422 are shifted by a half length of the interval dP, as in the case of the image sensor module 101, so as to compensate each other's brightness.

  FIG. 7 shows an image sensor module according to a third embodiment of the present invention. The image sensor module 103 of the present embodiment is different from the image sensor module 101 in that it includes two spacers 533 instead of the four spacers 530. The details of the first light source means 410 and the second light source means 420 are different from those of the image sensor module 101.

  In the present embodiment, as shown in FIG. 7, the LED module 412a is installed at a position separated by a distance dC from the right end of the first substrate 411 in the main scanning direction x in the drawing. The LED module 412b is installed at a position separated by a distance dC from the left end of the first substrate 411 in the main scanning direction x in the figure. Further, the LED module 422a is installed at a position separated by a distance dC from the right end of the second substrate 421 in the main scanning direction x in the drawing. The LED module 422b is installed at a position separated by a distance dC from the left end of the second substrate 421 in the main scanning direction x in the figure. That is, in the present embodiment, the arrangement of the plurality of LED modules 412 on the first substrate 411 and the arrangement of the plurality of LED modules 422 on the second substrate 421 are the same. For this reason, in this embodiment, the 1st light emission means 410 and the 2nd light emission means 420 are compatible, and can share a common component.

  Furthermore, in the present embodiment, as shown in FIG. 7, the left end of the first substrate 411 in the main scanning direction x in the drawing is in contact with the left end of the first recess 210 in the drawing. It touches. In addition, an end portion on the right side in the drawing in the main scanning direction x of the second substrate 421 is in contact with an end portion on the right side in the drawing of the second recess 220.

  As shown in FIG. 7, one of the spacers 533 includes an end on the right side in the main scanning direction x of the first substrate 411 and a right side in the main scanning direction x of the first recess 210. It is provided between the side ends. Another spacer 533 includes an end of the second substrate 421 on the left side in the main scanning direction x in the figure and an end of the second recess 220 on the left side in the main scanning direction x in the figure. It is provided in between.

  The spacer 533 is formed, for example, so that the dimension in the main scanning direction x is half the distance dP. By disposing such a spacer 533 as described above, the first substrate 411 and the second substrate 421 are shifted by a length that is half the interval dP in the main scanning direction x. For this reason, the row of the LED modules 412 and the row of the LED modules 422 are shifted by a half length of the interval dP, as in the case of the image sensor module 101, so as to compensate each other's brightness.

  FIG. 8 shows an image sensor module according to a fourth embodiment of the present invention. In the image sensor module 104 of the present embodiment, the positions of the first recess 210 and the second recess 220 are different from those of the image sensor module 101. The details of the first light source means 410 and the second light source means 420 are different from those of the image sensor module 101.

  In the present embodiment, as shown in FIG. 8, the LED module 412 a is installed at a position separated by a distance dB from the right end of the first substrate 411 in the main scanning direction x in the figure. Further, the LED module 422b is installed at a position separated by a distance dB from the left end in the main scanning direction x of the second substrate 421 in the drawing. That is, in the present embodiment, the arrangement of the plurality of LED modules 412 on the first substrate 411 and the arrangement of the plurality of LED modules 422 on the second substrate 421 are the same. For this reason, in this embodiment, the 1st light emission means 410 and the 2nd light emission means 420 are compatible, and can share a common component.

  Furthermore, in the present embodiment, as shown in FIG. 8, the end portion on the right side in the main scanning direction x of the first concave portion 210 is the right side in the main scanning direction x of the second concave portion 220. It is located on the left side in the main scanning direction x from the end on the side. Further, the left end in the main scanning direction x of the first recess 210 in the main scanning direction x is more left in the main scanning direction x than the left end in the main scanning direction x of the second recess 220 in the drawing. Located on the side. That is, the second recess 220 is formed at a position shifted from the first recess 210 by a half of the distance dP. Also with such a configuration, it is possible to shift the first substrate 411 and the second substrate 421 by a length that is half the interval dP in the main scanning direction x. Also in the present embodiment, the row of the LED modules 412 and the row of the LED modules 422 are shifted by half the distance dP, as in the case of the image sensor module 101, and compensate for each other's brightness. ing.

  9 and 10 show an image sensor module according to a fifth embodiment of the present invention. The image sensor module 105 of the present embodiment is of a reduction optical system type, and includes a case 200, a reading substrate 300, a first light emitting unit 410, a second light emitting unit 420, and a first support member 510. A second support member 520, a plurality of spacers 530, a lens 630, a plurality of mirrors 640, and a sensor IC 700.

  The case 200 of the present embodiment includes a first recess 210 that houses the first light emitting means 410, a second recess 220 that houses the second light emitting means 420, and a first recess in the sub-scanning direction y. A groove 230 sandwiched between 210 and the second recess 220 is formed. As in the case of the image sensor module 101, the first recess 210 and the second recess 220 in the present embodiment are formed at the same position in the main scanning direction x.

  One of the plurality of mirrors 640 is disposed on the lower side of the groove 230 in FIG. 9 and reflects light from the reading object 890 that has passed through the groove 230 to the other mirror 640. In other words, the optical path between the reading object 890 and the mirror 640 is sandwiched between the grooves 230.

  The lens 630 is disposed on the optical path between the reading object 890 and the sensor IC 700. The plurality of mirrors 640 are disposed on the optical path between the reading object 890 and the lens 630. The light that passes through the groove 230 and is reflected by the mirror 640 is imaged by a lens 630 on a light receiving unit (not shown) of the sensor IC 700. Note that the sensor IC 700 of the present embodiment is configured by, for example, a charge coupled device (CCD).

  In the first light emitting means 410 in the present embodiment, the arrangement of the plurality of LED modules 412 is different from that in the image sensor module 101. In the reduction optical system type, in consideration of the influence of the lens 630, a larger amount of light is required at both ends at x in the main scanning direction than at the center. For this reason, as shown in FIG. 10, the plurality of LED modules 412 in the present embodiment are arranged at a relatively narrow pitch (interval dP1) at both ends in the main scanning direction x, and the center in the main scanning direction x. The portions are arranged at a relatively wide pitch (interval dP2). In the present embodiment, the LED module 412a positioned at the right end in the main scanning direction x is installed at a distance dA from the right end in the main scanning direction x of the first substrate 411. ing. The LED module 412b positioned at the left end in the main scanning direction x is installed at a distance dB from the left end in the main scanning direction x of the first substrate 411. As in the case of the image sensor module 101, the distance dA is longer than the distance dB. Specifically, the distance dA is longer than the distance dB by half the distance dP1 (dP1 / 2).

  In the second light emitting means 420 in the present embodiment, the arrangement of the plurality of LED modules 422 is determined according to the arrangement of the plurality of LED modules 412. Each LED module 422 in the present embodiment is arranged at a position shifted from each LED module 412. For example, among the plurality of LED modules 422, the rightmost LED module 422a in FIG. 10 in the main scanning direction x is shifted to the right in FIG. 10 by dP1 / 2 in the main scanning direction x with respect to the LED module 412a. Is installed. Further, the LED module 422b at the left end in FIG. 10 in the main scanning direction x is installed at a position shifted to the right in FIG. 10 by dP1 / 2 in the main scanning direction x with respect to the LED module 412b. In the central portion in the main scanning direction x, the LED module 422 is installed at a position shifted to the right in FIG. 10 by dP2 / 2 in the main scanning direction x with respect to the LED module 412.

  According to such an arrangement, the plurality of LED modules 422 are respectively arranged between a pair of adjacent LED modules 412 in the main scanning direction x except for the LED module 422a. For this reason, the second light emitting means 420 can compensate for the light and darkness generated in the first light emitting means 410.

  In the reduction optical system type image sensor module, it is possible to adopt a method of shifting the positions of the first substrate 411 and the second substrate 421 as shown by the image sensor modules 102 to 104. .

  11 to 13 show an image sensor module according to a sixth embodiment of the present invention. The image sensor module 106 of the present embodiment is different from the image sensor module 101 in the configuration of the first light emitting means 410 and the second light emitting means 420. Other configurations of the image sensor module 106 are the same as those of the image sensor module 101.

  The first light emitting means 410 in the present embodiment includes a pair of first light emitting units 431A and 431B, a light guide 450, and a reflector 460 that covers most of the light guide 450. The first light emitting unit 431 </ b> A includes an LED module 441, an LED case 442 that holds the LED module 441, and an adjustment member 443. The adjustment member 441 is attached to the right end of FIG. 12 in the main scanning direction x of the LED case 442. The LED module 441 in the first light emitting unit 431A is configured to emit white light toward the left in FIG. 12 in the main scanning direction x. The first light emitting unit 431 </ b> B includes an LED module 441 and an LED case 442 that holds the LED module 441. The LED module 441 in the first light emitting unit 431B is configured to emit white light toward the right in FIG. 12 in the main scanning direction x. The first light emitting unit 431A is longer in the main scanning direction x than the first light emitting unit 431B by the amount of the adjustment member 443.

  The second light emitting means 420 in this embodiment includes a pair of second light emitting units 432A and 432B, a light guide 450, and a reflector 460 that covers most of the light guide 450. The second light emitting unit 432A includes an LED module 441 and an LED case 442 that holds the LED module 441. The LED module 441 in the second light emitting unit 432A is configured to emit white light toward the left in FIG. 12 in the main scanning direction x. The second light emitting unit 432B includes an LED module 441, an LED case 442 that holds the LED module 441, and an adjustment member 443. The LED module 441 in the second light emitting unit 432B is configured to emit white light toward the right in FIG. 12 in the main scanning direction x. The adjustment member 441 is attached to the left end in FIG. 12 in the main scanning direction x of the LED case 442. The second light emitting unit 432B is longer in the main scanning direction x than the second light emitting unit 432A by the amount of the adjustment member 443.

  The light guide 450 is made of, for example, acrylic resin and has a rod shape that extends in the main scanning direction x. As shown in FIG. 13, the light guide 450 has a substantially circular cross section, and a part thereof is exposed from the reflector 460. A reflective portion 451 is provided on the opposite side of the portion exposed from the reflector 460. FIG. 14 is a diagram in which the reflecting portion 451 of the light guide 450 is in front. As shown in FIG. 14, the reflecting portion 451 is provided over substantially the entire length in the main scanning direction x. Further, the reflective portion 451 is formed with a plurality of groove portions 452 arranged in the main scanning direction x.

  In the present embodiment, the same type of light guide 450 is used in the first light emitting means 410 and the second light emitting means 420. In the first light emitting means 410, the light guide 450 is sandwiched between a pair of first light emitting portions 431A and 431B in the main scanning direction x. Light emitted from the first light emitting portion 431A from the right end surface in FIG. 12 of the light guide 450 is taken into the light guide 450, and the first light emitting portion 431B from the left end surface in FIG. The light emitted from the light guide 450 is taken into the light guide 450. In the second light emitting means 420, the light guide 450 is sandwiched between a pair of second light emitting portions 432A and 432B in the main scanning direction x. Light emitted from the second light emitting unit 432A from the right end surface in FIG. 12 of the light guide 450 is taken into the light guide 450, and the second light emitting unit 432B from the left end surface in FIG. The light emitted from the light guide 450 is taken into the light guide 450.

  The reflector 460 is made of, for example, a white resin, and prevents light from leaking from the light guide 450. Light is emitted from the portion of the light guide 450 exposed from the reflector 460.

  Light incident from both ends of the light guide 450 in the main scanning direction x travels in the main scanning direction x while reflecting the inside of the main scanning direction x. The light reflected by the reflecting portion 451 goes to the portion exposed from the reflector 460 and is emitted to the outside from there. In the plurality of groove portions 452, light tends to be scattered and light tends to be easily emitted to the outside. In the light guide 450, the installation density of the plurality of groove portions 452 is small at both ends in the main scanning direction x, and the installation density of the plurality of groove portions 452 is large in the central portion in the main scanning direction x. This is intended to make the amount of light emitted along the main scanning direction x constant.

  In the first light emitting means 410 and the second light emitting means 420 having such a configuration, unevenness of light may occur depending on the arrangement of the plurality of groove portions 452.

  FIG. 15 is a diagram for explaining the difference between the first light emitting means 410 and the second light emitting means 420. In FIG. 15, the reflector 460 is omitted for explanation. In the first light emitting means 410, the first light emitting portion 431A that is relatively long in the main scanning direction x is disposed at the right end in the drawing in FIG. 15, and the first light emitting portion 431B that is relatively short at the left end. Is arranged. On the other hand, in the second light emitting means 420, a relatively short second light emitting portion 432A in the main scanning direction x is disposed at the right end in the drawing in FIG. 15, and a relatively long second light emitting portion 420 is disposed at the left end. The light emitting part 432B is arranged. For this reason, the position of the light guide 450 is shifted by the length of the adjustment member 443 between the first light emitting means 410 and the second light emitting means 420.

  In the image sensor module 106 according to the present embodiment, by selecting an appropriate length of the adjustment member 443, a plurality of groove portions 452 in the second light emitting means 420 can be paired with a pair of adjacent groove portions in the first light emitting means 410. It can be arranged so as to be sandwiched by 452. For this reason, it is possible to cancel the uneven brightness of the light of the first light emitting means 410 and the second light emitting means 420.

  In the present embodiment, the same light guide 450 is used for the first light emitting means 410 and the second light emitting means 420, but different light guides 450 may be used for both. For example, if two light guides 450 whose groove portions 452 are arranged in advance are prepared in advance, the first light emitting means 410 and the second light emitting means 420 are placed at the same position in the main scanning direction x. Even when they are arranged, it is possible to cancel out unevenness in brightness.

  16 to 18 show modified examples of the image sensor module 106. In the image sensor module 106 shown in FIGS. 11 to 13, the position of the light guide 450 is shifted between the first light emitting means 410 and the second light emitting means 420 using the adjusting member 443. 16 to 18 show examples in which the adjustment member 443 is not used.

  In the modification shown in FIG. 16, as in the case of the image sensor module 102, the positions of the first light emitting means 410 and the second light emitting means 420 are shifted by using two types of spacers 531 and 532. .

  One of the spacers 531 that is relatively long in the main scanning direction x is between the end on the right side in FIG. 16 of the first light emitting portion 431A and the end on the right side in FIG. 16 of the first recess 210. Is arranged. Another spacer 531 is disposed between the left end of the second light emitting unit 432B in FIG. 16 and the end of the second recess 220 on the left side in FIG.

  One of the relatively short spacers 532 in the main scanning direction x is between the end on the left side in FIG. 16 of the first light emitting portion 431B and the end on the left side in FIG. Is arranged. The other spacer 532 is disposed between the right-side end in FIG. 16 of the second light-emitting portion 432A and the right-side end in FIG. 16 of the second recess 220.

  In the modification shown in FIG. 17, the positions of the first light emitting means 410 and the second light emitting means 420 are shifted by using the spacer 533 as in the case of the image sensor module 103.

  As shown in FIG. 17, the end of the first light emitting unit 431B on the left side in the main scanning direction x is in contact with the end of the first recess 210 on the left side in the drawing. In addition, an end portion on the right side in the drawing in the main scanning direction x of the second light emitting portion 432A is in contact with an end portion on the right side in the drawing of the second recess 220.

  One of the spacers 533 is formed between an end portion on the right side in the main scanning direction x of the first light emitting portion 431A and an end portion on the right side in the main scanning direction x of the first recess 210. It is provided in between. The other of the spacers 533 includes an end portion on the left side in the drawing in the main scanning direction x of the second light emitting portion 432B, and an end portion on the left side in the drawing in the main scanning direction x of the second recess 220. It is provided between.

  In the modification shown in FIG. 18, as in the case of the image sensor module 104, the first light emitting means 410 and the second light emitting means 420 are shifted by shifting the positions of the first concave portion 210 and the second concave portion 220. The position is shifted.

  As shown in FIG. 18, the end of the first recess 210 on the right side in the main scanning direction x in the figure is more main than the end of the second recess 220 on the right side in the figure in the main scanning direction x. It is located on the left side in the scanning direction x. Further, the left end in the main scanning direction x of the first recess 210 in the main scanning direction x is more left in the main scanning direction x than the left end in the main scanning direction x of the second recess 220 in the drawing. Located on the side.

  The image sensor module according to the present invention is not limited to the above-described embodiment. The specific configuration of each part of the image sensor module according to the present invention can be varied in design in various ways. For example, in the above-described embodiment, the case 200 is made of metal, but a resin case may be used.

101-106 Image sensor module 200 Case 210 First recess 220 Second recess 230 Grooves 240, 250 Opening 300 Reading substrate 410 First light emitting means 411 First substrate 412 LED module (first light emitting element)
420 2nd light emission means 421 2nd board | substrate 422 LED module (2nd light emitting element)
431A, 431B 1st light emission part 432A, 432B 2nd light emission part 441 LED module 442 LED case 443 Adjustment member 450 Light guide 451 Reflection part 452 Groove part 460 Reflector 510 1st support member 511 1st slope 520 2nd Support member 521 Second slope 530, 531, 532, 533 Spacer 600 Lens unit 610 Lens 620 Lens holder 630 Lens 640 Mirror 700 Sensor IC (light receiving means)
710 Light-receiving part 711 1st group 712 2nd group 713 3rd group 720 Filter (ultraviolet light attenuation means)
721 First filter 722 Second filter 723 Third filter 730 Pad 800 Transparent cover 800A Strip region 810 First light diffusing member 820 Second light diffusing member 890 Reading object x Main scanning direction y Sub-scanning direction z Thickness direction

Claims (11)

A light receiving means having a plurality of light receiving portions arranged in the main scanning direction;
A first light emitting unit that has a plurality of first light emitting elements arranged in the main scanning direction and illuminates a reading object located on one side in a first direction orthogonal to the main scanning direction and the sub scanning direction; ,
A second light emitting unit that has a plurality of second light emitting elements arranged in the main scanning direction and illuminates a reading object located on one side in the first direction;
A case for housing the first light emitting means and the second light emitting means;
With
It said plurality of first light-emitting element includes a first light-emitting element of a pair of mutually adjacent in the main scanning direction at a distance from each other,
The plurality of second light emitting elements includes a second light emitting element disposed at a position sandwiched between the pair of first light emitting elements in the main scanning direction ,
The first light emitting means has a first substrate extending long along the main scanning direction,
The plurality of first light emitting elements are mounted on the first substrate,
The second light emitting means has a second substrate that extends long along the main scanning direction and is disposed on one side of the first substrate in the sub-scanning direction,
The plurality of second light emitting elements are mounted on the second substrate,
A lens disposed on an optical path between the reading object and the light receiving means;
A mirror disposed on an optical path between the reading object and the lens;
Further comprising
An optical path between the reading object and the mirror is sandwiched between the first substrate and the second substrate in the sub-scanning direction,
The first substrate includes a first location where the adjacent first light emitting elements are arranged at a first interval, and the adjacent first light emitting element is closer to the center than the first location. An image sensor module comprising: a second portion arranged at a second interval wider than the first interval . Of the plurality of first light emitting elements, the first light emitting element located at one end in the main scanning direction is separated from the one end in the main scanning direction of the first substrate by a first distance. Installed in the
Of the plurality of second light emitting elements, the second light emitting element located at one end in the main scanning direction is closer to the first distance from one end in the main scanning direction of the second substrate. The image sensor module according to claim 1 , wherein the image sensor module is installed at a position separated by a short second distance. Of the plurality of first light emitting elements, the first light emitting element located at the other end in the main scanning direction is the second distance from the other end in the main scanning direction of the first substrate. It is installed at a remote location,
Of the plurality of second light emitting elements, the second light emitting element located at the other end in the main scanning direction is the first distance from the other end in the main scanning direction of the second substrate. The image sensor module according to claim 2 , wherein the image sensor module is installed at a distant position. The case is formed with a first recess for accommodating the first substrate and a second recess for accommodating the second substrate,
Both end portions in the main scanning direction of the first recess and the second recess are at the same position,
And one side end portion in the main scanning direction of the first substrate, a first alignment member provided between one side of the end portion in the main scanning direction of the first recess,
The the end portion of one side in the main scanning direction of the second substrate, the second position adjusting member provided between the one side of the end portion in the main scanning direction of the second recess, further comprising a And
The image sensor module according to claim 1 , wherein the first position adjustment member is formed longer in the main scanning direction than the second position adjustment member. And ends on the other side in the main scanning direction of the first substrate, the additional first alignment member provided between the other side of the end portion in the main scanning direction of the first recess,
And ends on the other side in the main scanning direction of the second substrate, and the addition of a second position adjusting member provided between the other side of the end portion in the main scanning direction of the second recess, the further Has
The image sensor module according to claim 4 , wherein the additional first position adjustment member is formed shorter in the main scanning direction than the additional second position adjustment member. The case is formed with a first recess for accommodating the first substrate and a second recess for accommodating the second substrate,
Both end portions in the main scanning direction of the first recess and the second recess are at the same position,
And one side end portion in the main scanning direction of the first substrate, a first alignment member provided between one side of the end portion in the main scanning direction of the first recess,
And a second position adjusting member provided between the other end of the second substrate in the main scanning direction and the other end of the second recess in the main scanning direction. And
The other end of the first substrate in the main scanning direction is in contact with the other end of the first recess in the main scanning direction,
2. The image sensor module according to claim 1 , wherein an end portion on one side in the main scanning direction of the second substrate is in contact with an end portion on one side in the main scanning direction of the second recess. The case is formed with a first recess for accommodating the first substrate and a second recess for accommodating the second substrate,
End of one side in the main scanning direction of the first recess is located on the other side in the main scanning direction than the end of one side in the main scanning direction of the second recess, to claim 1 The image sensor module described. End of the other side in the main scanning direction of the first recess, than the end portion on the other side in the main scanning direction of the second recess are located on the other side in the main scanning direction, to claim 7 The image sensor module described. A metal first support member housed in the first recess, and a metal second support member housed in the second recess,
The first substrate is supported by the first support member;
The second substrate is supported by the second supporting member, the image sensor module according to any one of claims 4 to 8. The first support member has a first slope that is displaced toward the other side in the sub-scanning direction toward one side in the first direction.
The first substrate is supported on the first slope;
The second support member has a second inclined surface that is displaced toward one side in the sub-scanning direction toward one side in the first direction.
The image sensor module according to claim 9 , wherein the second substrate is supported by the second inclined surface. Further comprising a substrate reader supporting said light receiving means, the image sensor module according to any one of claims 1 to 10.

Images