JP2014007464A - Light source device and reflector plate support structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a light source device and a reflector plate support structure, having a small number of components and having a high precision reflector plate.SOLUTION: The light source device or the reflector plate support structure includes a reflector plate extending in a primary scanning direction and a plurality of reflector plate support parts that are intermittently disposed along the primary scanning direction to support the reflector plate. Otherwise, the light source device or the reflector plate support structure includes the reflector plate extending in the primary scanning direction and the plurality of reflector plate support parts that are disposed by being mutually separated in a predetermined interval along the primary scanning direction to support the reflector plate.

Description

  The present invention relates to a light source device used for illumination of an image reading apparatus (image forming apparatus) and a reflector support structure used for an image reading apparatus (image forming apparatus).

  Conventionally, as a light source device used for illumination of an image reading device, a light source such as an LED is disposed at the end of a transparent light guide extending in the main scanning direction of the image reading device, and light is incident thereon. Some emit light from the side surface of the light guide into which light is incident (see, for example, Patent Documents 1 to 3). This is a so-called side light type light source device.

  In a light source device as described in Patent Document 1, an optical filter is disposed opposite to an end face of a light guide. Further, the light source devices as described in Patent Documents 2 and 3 take measures against expansion and contraction due to temperature changes around the light guide. There are a light source disposed on both end faces of the light guide as described in Patent Documents 1 and 2, and a light source disposed on one end face of the light guide as described in Patent Document 3.

  Other examples of the light source device in which the light source is disposed on one end face of the light guide include Patent Documents 4 to 8. In contrast to the light guide as described in Patent Document 4, there are some in which the ends of the light guide as described in Patent Documents 5 to 8 are bent. Of course, as described in FIG. 10 of Patent Document 8, there is a type in which both ends of the light guide are bent and light sources are arranged on both ends of the bent light guide.

  Further, as a light source device used for illumination of another image reading device, there is one in which light sources such as a plurality of LEDs are arranged in the main scanning direction of the image reading device (see, for example, Patent Documents 9, 10, and 11). . Patent Documents 9 and 10 describe light that is emitted from an LED, guided by a light guide member, and applied to a reflecting plate. Japanese Patent Application Laid-Open No. H11-228688 describes a technique for irradiating a reflector with light emitted from an LED. This is a so-called LED array type light source device.

  Patent Documents 9, 10, and 11 also describe a reflector (first mirror) that constitutes the imaging optical system of the image reading apparatus. In particular, FIG. 5 of Patent Document 10 discloses a reflecting plate (first mirror) supported by a carriage of an image reading apparatus.

  Japanese Patent Application Laid-Open Nos. 2004-133 and 2004-0897 include reflection plates (first mirrors) supported by the carriage of the image reading apparatus. In Patent Documents 12 and 13, both end portions of the reflection plate (first mirror) are supported.

JP 2008-28617 A (FIGS. 1 and 5) JP 2010-103742 A (FIG. 1) Japanese Patent Laying-Open No. 2011-61411 (FIG. 3) JP-A-2006-85975 (FIGS. 2 and 7) JP 2010-21983 (FIGS. 5, 8, 11) Japanese Patent Laid-Open No. 2007-201845 (FIG. 7) JP 2004-266313 A (FIGS. 1 and 5) Japanese Patent Laid-Open No. 11-55476 (FIGS. 4 and 10) Japanese Unexamined Patent Publication No. 2011-211144 (paragraph number [0023], FIGS. 3 to 6) Japanese Patent Laying-Open No. 2011-49808 (paragraph number [0037], FIG. 3, FIG. 4, FIG. 5) Japanese Unexamined Patent Publication No. 2007-318406 (FIGS. 4 and 8 to 11) JP 2002-135533 A (FIG. 3) JP 2004-279663 A (FIGS. 2 to 7)

Problem 18 Light source devices for image reading devices are required to increase the brightness of the light source and to supply uniform light in the longitudinal direction and the height direction as the image reading devices increase in speed and resolution. . Further, when a book whose thickness is to be read by the image reading apparatus is placed apart from the mounting table (top plate) of the image reading apparatus, a shadow portion is generated in the read image data. Therefore, conventionally, as described in Patent Documents 9, 10, and 11, the reading target is irradiated from two optical paths using a reflector and a light guide.

  However, since the reflecting plate disclosed in Patent Documents 9, 10, and 11 supports most of the back surface of the reflecting plate or supports at the end of the reflecting plate, the former supports the reflecting plate. There is a problem that bending or warping of the member to be affected may affect the reflecting plate, and the latter has a problem that bending of the reflecting plate due to its own weight or warping of the reflecting plate due to deformation of the supporting member may occur. .

  For example, in Patent Document 9, the reflection plate 54 is held by the reflection plate bracket 59 and is installed on the first frame 58 separately from the reflection plate bracket 59 and the light guide 53, and the reflection plate (mirror) mounting surface is the full length. There is a problem that the sheet metal bending accuracy may be deteriorated. There is also a problem that the structure becomes complicated.

  Further, the same kind of problem is also present in the reflector (first mirror) supported by the carriage of the image reading apparatus disclosed in Patent Documents 10, 12, and 13.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a light source device and a reflecting plate support structure having a reflecting plate with a small number of parts and high accuracy.

  A light source device according to a first aspect of the present invention is a light source device used for an image reading device, and is arranged to face a rod-like light source or array light source extending in the main scanning direction, and the rod-like light source or array light source, A reflector that extends in the main scanning direction and reflects light emitted from the side surface of the rod-shaped light source or array light source, and a plurality of reflections that are intermittently arranged along the main scanning direction and support the reflector And a plate support portion.

  A light source device according to a second aspect of the present invention is a light source device used in an image reading device, and is arranged to face a rod-like light source or array light source extending in the main scanning direction, and the rod-like light source or array light source, A reflector that extends in the main scanning direction and reflects light emitted from a side surface of the rod-shaped light source or the array light source, and is arranged at a predetermined interval along the main scanning direction; And a plurality of reflecting plate supporting portions to be supported.

  The light source device according to a third aspect of the present invention is such that the plurality of reflecting plate support portions are arranged on the surface opposite to the surface that reflects the light emitted from the side surface of the rod-shaped light source or the array light source in the reflecting plate. It is a thing of Claim 1 or 2.

  In the light source device according to a fourth aspect of the invention, the plurality of reflecting mirror support portions are at an angle with respect to the sub-scanning direction with respect to the main scanning direction with respect to the plate-like member that supports the plurality of reflecting mirror support portions. It is a thing in any one of Claims 1-3 which has it.

  The light source device according to a fifth aspect of the present invention is the light source device according to the fourth aspect, wherein the plurality of reflecting mirror support portions are integrated with the plate-like member.

  6. The light source device according to claim 6, wherein each of the plurality of reflecting mirror support portions is formed by bending one end of the plate-like member along the main scanning direction. It is.

  In the light source device according to the seventh aspect of the invention, the plate-shaped member has a plurality of portions other than the plurality of reflecting mirror support portions that are continuous with the plate-shaped member, at one end along the main scanning direction. It is a thing of Claim 6 which has a plate-shaped edge part.

  The light source device according to an eighth aspect of the present invention is the light source device according to the seventh aspect, wherein the plate-like end portion has a length in the main scanning direction that is longer than a length of the reflecting mirror support portion in the main scanning direction. Is.

  A light source device according to a ninth aspect of the present invention is the light source device according to the seventh or eighth aspect, wherein the plurality of plate-like end portions have connection interface means with a carriage of the image reading device.

  In the light source device according to the invention of claim 10, the plurality of plate-like end portions are integrally connected to a distal end side along the sub-scanning direction from a base end side continuous with the plurality of reflector support portions. It is a thing in any one of Claim 7,8,9.

  The light source device according to the invention of claim 11 is the light source device according to any one of claims 6 to 10, wherein the plate-like member holds the rod-like light source or the array light source at the other end of the plate-like member. is there.

  The light source device according to the invention of claim 12 is characterized in that the plurality of reflecting plate support portions are bent with respect to the sub-scanning direction in addition to the base end portion having an angle with respect to the plate-like member. It has what is in any one of Claims 4-11.

  A light source device according to a thirteenth aspect of the present invention is the light source device according to the first or second aspect, wherein the plurality of reflecting plate support portions have portions bent with respect to the sub-scanning direction with respect to the main scanning direction. is there.

  A reflecting plate supporting structure according to a fourteenth aspect of the present invention is a reflecting plate supporting structure used in an image reading apparatus, and is arranged intermittently along the reflecting plate extending in the main scanning direction and the main scanning direction. And a plurality of reflecting plate support portions for supporting the reflecting plate.

  A reflector support structure according to a fifteenth aspect of the invention is a reflector support structure used in an image reading apparatus, and a reflector extending in the main scanning direction and a predetermined distance from each other along the main scanning direction. And a plurality of reflecting plate support portions that support the reflecting plate.

In the reflector support structure according to the invention of claim 16, the plurality of reflector support parts are arranged on the surface side opposite to the reflective surface of the reflector,
It is integral with the plate-like member that supports the plurality of reflector support parts,
With respect to the plate-like member, it stands up with an angle with respect to the sub-scanning direction with respect to the main scanning direction,
The one according to claim 14 or 15, wherein each of the plate-like members is formed by bending one end along the main scanning direction.

  In the reflection plate support structure according to the invention of claim 17, the plurality of reflection plate support portions are bent with respect to the sub-scanning direction other than a base end portion having an angle with respect to the plate-like member. It is a thing of Claim 16 which has a part.

  The reflecting plate supporting structure according to an eighteenth aspect of the present invention is the reflecting plate supporting structure according to claim 14 or 15, wherein the plurality of reflecting plate supporting portions have a bent portion with respect to the sub-scanning direction with respect to the main scanning direction. Is.

In the light source device according to the invention of claim 19, the rod-shaped light source is a discharge lamp,
The array light source according to any one of claims 1 to 13, wherein a plurality of light emitting sections are arranged in the main scanning direction and emit light in the sub scanning direction.

The light source device according to the invention of claim 20 is characterized in that the rod-shaped light source includes a light emitting portion, a columnar light guide that guides light from the light emitting portion incident from the end face in the longitudinal direction and emits the light from the side surface It consists of
14. The array light source according to claim 1, wherein a plurality of the light emitting units are arranged in the main scanning direction, and light is emitted in the sub scanning direction by a light guide member or a reflecting member. It is.

  As described above, according to the inventions according to claims 1 to 13, 19 and 20, since the reflecting plate is supported by the plurality of reflecting plate support portions, the number of components is small, and the reflecting plate is accurate. A light source device can be obtained.

  According to the invention which concerns on Claims 14-18, since the reflecting plate is supported by the several reflecting plate support part, there can be obtained the reflecting plate support structure which has a small number of parts and has a precise reflecting plate. .

It is a disassembled perspective view of the light guide of the light source device which concerns on Embodiment 1 of this invention, and its periphery. It is a top view (before bending) of the plate-shaped member used as the housing | casing of the light source device which concerns on Embodiment 1 of this invention. It is a disassembled perspective view of the light source device which concerns on Embodiment 1 of this invention. It is a perspective view of the light source device which concerns on Embodiment 1 of this invention. It is a top view (top view) of the light source device according to Embodiment 1 of the present invention. It is a side view (longitudinal direction) of the light source device which concerns on Embodiment 1 of this invention. It is a side view (short direction) of the light source device which concerns on Embodiment 1 of this invention. It is sectional drawing (longitudinal direction) of the light source device which concerns on Embodiment 1 of this invention. It is a light emission part periphery sectional drawing (longitudinal direction, with an optical axis (main optical path)) of the light source device which concerns on Embodiment 1 of this invention. It is sectional drawing (with a transversal direction and an optical axis (main optical path)) of the light source device which concerns on Embodiment 1 of this invention. It is sectional drawing (short direction) of the light source device which concerns on Embodiment 1 of this invention. It is a top view (before bending) of the plate-shaped member used as the housing | casing of the light source device which concerns on Embodiment 1 of this invention. It is sectional drawing (short direction) of the light source device which concerns on Embodiment 1 of this invention. It is sectional drawing (short direction) of the light source device which concerns on Embodiment 1 of this invention. It is sectional drawing (short direction) of the light source device which concerns on Embodiment 1 of this invention. It is sectional drawing (short direction) of the light source device which concerns on Embodiment 1 of this invention. In the top view (before bending) of the plate-shaped member used as the housing | casing of the light source device (reflector support structure) which concerns on Embodiment 1 of this invention, and sectional drawing (short direction) of a light source device (reflector support structure) is there. It is a light emission part periphery sectional view (longitudinal direction) of the light source device concerning Embodiment 1 of this invention. It is the light emission part periphery sectional view (longitudinal direction) of the light source device which concerns on Embodiment 1 of this invention, and a light guide center vicinity sectional view (longitudinal direction). It is a light emission part periphery sectional view (longitudinal direction) of the light source device concerning Embodiment 1 of this invention. It is a light emission part periphery sectional view (longitudinal direction) of the light source device concerning Embodiment 1 of this invention. It is a top view (before bending) of the plate-shaped member used as the housing | casing of the light source device which concerns on Embodiment 2 of this invention (a light guide, a light guide holder, and a holder are mounted virtually). It is the light emission part periphery sectional drawing (longitudinal direction) and light guide center vicinity sectional drawing (longitudinal direction) of the light source device which concerns on Embodiment 2 of this invention. It is a top view (before bending) of the plate-shaped member used as the housing | casing of the light source device which concerns on Embodiment 2 of this invention. It is the light emission part periphery sectional drawing (longitudinal direction) and light guide center vicinity sectional drawing (longitudinal direction) of the light source device which concerns on Embodiment 2 of this invention. It is a top view (before bending) of the plate-shaped member used as the housing | casing of the light source device which concerns on Embodiment 2 of this invention (a light guide, a light guide holder, and a holder are mounted virtually). It is a light emission part periphery sectional view (longitudinal direction) of the light source device which concerns on Embodiment 2 of this invention. It is a top view (before bending) of the plate-shaped member used as the housing | casing of the light source device which concerns on Embodiment 2 of this invention (a light guide, a light guide holder, and a holder are mounted virtually). It is a light emission part periphery sectional view (longitudinal direction) of the light source device which concerns on Embodiment 2 of this invention. It is sectional drawing (longitudinal direction) of the holder of the light source device which concerns on Embodiment 2 of this invention. It is sectional drawing (longitudinal direction) of the holder of the light source device which concerns on Embodiment 2 of this invention. It is the light emission part periphery sectional drawing (longitudinal direction) and light guide center vicinity sectional drawing (longitudinal direction) of the light source device which concerns on Embodiment 2 of this invention. It is the light emission part periphery sectional drawing (longitudinal direction) and light guide center vicinity sectional drawing (longitudinal direction) of the light source device which concerns on Embodiment 2 of this invention. It is the light emission part periphery sectional drawing (longitudinal direction) and light guide center vicinity sectional drawing (longitudinal direction) of the light source device which concerns on Embodiment 2 of this invention. It is the light emission part periphery sectional drawing (longitudinal direction) and light guide center vicinity sectional drawing (longitudinal direction) of the light source device which concerns on Embodiment 2 of this invention. It is the light emission part periphery sectional drawing (longitudinal direction) and light guide center vicinity sectional drawing (longitudinal direction) of the light source device which concerns on Embodiment 2 of this invention. It is the light emission part periphery sectional drawing (longitudinal direction) and light guide center vicinity sectional drawing (longitudinal direction) of the light source device which concerns on Embodiment 2 of this invention. It is a light emission part periphery sectional view (longitudinal direction) of the light source device which concerns on Embodiment 2 of this invention. It is a light emission part periphery sectional view (longitudinal direction) of the light source device which concerns on Embodiment 2 of this invention. It is a light emission part periphery sectional view (longitudinal direction) of the light source device which concerns on Embodiment 2 of this invention. It is a top view (before bending) of the plate-shaped member used as the housing | casing of the light source device which concerns on Embodiment 3 of this invention (a light guide, a light guide holder, and a holder are mounted virtually). It is a light emission part periphery sectional view (short direction) of the light source device which concerns on Embodiment 3 of this invention. It is a holder periphery side view of the light source device which concerns on Embodiment 3 of this invention. It is a holder periphery side view of the light source device which concerns on Embodiment 3 of this invention. It is a light emission part periphery sectional view (short direction) of the light source device which concerns on Embodiment 3 of this invention. It is a holder periphery side view of the light source device which concerns on Embodiment 3 of this invention. It is a top view (before bending) of the plate-shaped member used as the housing | casing of the light source device which concerns on Embodiment 3 of this invention (a light guide, a light guide holder, and a holder are mounted virtually).

  In the present application, the main scanning direction and the sub-scanning direction (conveying direction) of the image reading apparatus (image forming apparatus) incorporating the light source device and the reflecting plate support structure according to the present application are respectively defined as the lengths of the light source device and the reflecting plate support structure. Direction and short direction. The long side direction of the casing of the light source device and the reflector support structure corresponds to the longitudinal direction, and the short side direction of the casing of the light source device and the reflector support structure corresponds to the short direction. The main scanning direction can also be said to be a direction in which the light source device according to the present application extends as a linear light source. That is, the main scanning direction (longitudinal direction, long side direction) and the sub-scanning direction (short side direction, short side direction). This is because the case where the casing of the light source device and the reflector support structure is square is taken into consideration. 1 to 47 in the present application, the arrow X indicates the main scanning direction (longitudinal direction, long side direction), the arrow Y indicates the sub scanning direction (short direction, short side direction), and the arrow Y indicates the light source. It refers to the thickness direction (height direction) of the device and the reflector support structure. However, in FIG. 17, arrows X, Y, and Z are attached as an example of the installation position of the reflector support structure. In FIGS. 30 and 31, arrows X, Y, and Z corresponding to the third embodiment are given in parentheses. That is, the arrows X, Y, and Z outside the parentheses correspond to the second embodiment.

Embodiment 1 FIG.
Embodiment 1 of the present invention will be described below with reference to FIGS. 6A is a side view of the light source device viewed from the dotted arrow A in FIG. 5, FIG. 6B is a side view of the light source device viewed from the dotted arrow B in FIG. 5, and FIG. FIG. 7B is a side view of the light source device viewed from the dotted line arrow D in FIG. 5, FIG. 8 is a cross-sectional view of the light source device along the dashed line EF in FIG. 9 is a cross-sectional view of the periphery of the light emitting unit of the light source device taken along the dashed-dotted line EF in FIG. 5, FIG. 11 is a cross-sectional view of the light source device taken along the dashed-dotted line GH in FIG. FIG. 11B is a cross-sectional view of the light source device taken along one-dot chain line IJ in FIG.

  1 to 21, reference numeral 1 denotes a light emitting element constituted by a point light source such as an LED that emits visible light or light having a wavelength outside visible light, or both, and 2 denotes a substrate on which at least one light emitting element is formed on an upper surface ( LED substrate), 3 is a light-emitting unit composed of the light-emitting element 1 and the substrate, and 4 is a light beam from the light-emitting unit 3 (light-emitting element 1) incident from the end face 4a (light incident unit 4a) in the longitudinal direction (main of the image reading apparatus) It is a columnar light guide that is guided in the scanning direction (simply referred to as the main scanning direction) and emitted from the side surface 4b (light emitting portion 4b). The light guide 4 is preferably made of a transparent resin. The light guide 4 is formed with at least one row of light scattering patterns 4c continuously or intermittently in the main scanning direction. In the present application, the case of two rows will be described. In addition, the light emission part 4b shows the position facing the light-scattering pattern 4c in the light guide 4. FIG. Therefore, when the light scattering patterns 4c are formed in two rows, the light emitting portions 4b are also arranged in two rows in the main scanning direction. However, depending on the positional relationship between the light scattering patterns 4c, the two rows of light emitting portions 4b are arranged. Some or all of these areas may overlap. In the present application, there are a diagram in which the reference numeral is omitted from the light emitting portion 4b and a diagram in which the illustration of the light scattering pattern 4c is omitted. The light scattering pattern 4c is formed at least in a portion corresponding to an effective reading area in the main scanning direction of the image reading apparatus. Reference numeral 4 d denotes a protrusion formed at the lower portion near the center of the light guide 4. In the drawings, the same reference numerals denote the same or corresponding parts, and detailed descriptions thereof are omitted.

  1 to 21, reference numeral 5 denotes an end of the light guide 4 including the end face 4 a, at least a part of the end face 4 a (a part necessary for the light from the light emitting element 1 to enter) and a part from which the light is emitted. The light guide holder is covered except for the side surface. The portion of the light guide holder 5 that faces the light guide 4 desirably has a color with good reflectance such as white, but is not limited thereto. 5a is a light guide locking portion where the light guide holder 5 locks the light guide 4, and 5b is a first protrusion formed at both ends in the longitudinal direction of the light guide holder 5, and 5c is a light guide. Second projections formed near the center of the body holder 5 in the longitudinal direction, 5d is a fitting hole (for the light guide 4) into which the projection 4d is inserted, and 6 is from the light emitting unit 3 (light emitting element 1). It is an optical filter that filters light or generates excitation light (may be composite light including light having a wavelength that has not been converted) from light from the light emitting unit 3 (light emitting element 1). The optical filter 6 converts optical characteristics using glass or a PET resin sheet as a base material. For example, the optical filter 6 is for obtaining excitation light using a phosphor or the like, or for removing unnecessary wavelengths such as a bandpass filter. The optical filter 6 is fixed to the holder 7 by adhesion or the like. When the light emitting element 1 has a secondary optical wavelength other than the target wavelength, it is necessary to insert an optical filter 6 having a function of blocking an unnecessary wavelength band into the optical path. In the drawings, the same reference numerals denote the same or corresponding parts, and detailed descriptions thereof are omitted.

  1 to 21, reference numeral 8 denotes a plate-like member (preferably made by sheet metal processing) that supports the light guide holder 5 and the holder 7. The plate-like member 8 indirectly supports the light guide 4 and the optical filter 6 (if the substrate 2 is not in contact with the plate-like member 8, the substrate 2 is also indirectly supported by the plate-like member 8. It can be said that. 8a is a flat plate-like member (made of metal) before the plate-like member 8 is bent, 8b is a long hole (a hole extending in the longitudinal direction) into which the first protrusion 5b is inserted, and 8c is a second protrusion 5c. Fitting hole (for light guide holder 5), 9 is a heat transfer body (including a grease-like material other than a sheet, for example) that transfers the heat of substrate 2 to plate-like member 8, for example, a heat conductive compound 10 is a screw that fastens the plate-like member 8 and the holder 7 with the substrate 2 and the heat transfer body 9 interposed therebetween. In some cases, the screw 10 is not shown. The holder 7, the substrate 2, and the heat transfer body 9 (in the case of a sheet) are provided with screw holes for screws 10. The screw holes in the substrate 2 and the heat transfer body 9 may be simple communication holes that are not cut. The heat transfer body 9 may be omitted. In the drawings, the same reference numerals denote the same or corresponding parts, and detailed descriptions thereof are omitted.

  1 to 21, 11 is arranged in parallel with the light guide 4 in the longitudinal direction, reflects the secondary light (details will be described later) emitted from the light guide 4, and is directed to the document placement table of the image reading apparatus. Irradiate (in the direction in which a reading target of an image reading device such as a document or banknote exists), which is composed of a metal vapor deposition surface or the like, extends in the longitudinal direction, and is a thin plate or sheet. A reflecting plate (mirror) 801 is a reflecting plate support portion formed by bending a plate-like member 8 that supports the reflecting plate 11. A plurality of reflector support parts 801 are intermittently arranged along the main scanning direction and support the reflector 11. Since the reflector support part 801 is inclined, it can be said to be an inclined part 801. The reflecting plate 11 is fixed to the reflecting plate support portion 801 by bonding or the like, and has an appropriate distance from the light guide 4 and the document setting table (a position where a reading target of an image reading device such as a document or a bill exists). Keeping the angle. Reference numeral 802 denotes a light guide holder fixing portion formed by bending a plate-like member 8 that holds the light guide holder 5. A plurality of light guide holder fixing portions 802 are intermittently arranged along the main scanning direction (longitudinal direction) (there may be one. The light guide holder fixing portion 802 and the bottom surface of the plate-like member 8 (with a rectangular shape). Plate-like member 8 sandwiches and holds the light guide holder 5. In the figure, the same reference numerals denote the same or corresponding parts, and detailed descriptions thereof are omitted.

  1 to 21, reference numeral 803 denotes a plurality of portions of the one end along the main scanning direction (longitudinal direction) of the plate-like member 8, and portions other than the plurality of reflecting mirror support portions 801 are respectively continuous with the plate-like member 8. The plate-like end portion (reflecting plate 11 side) and 804 are the ends of the plate-like member 8 along the main scanning direction (longitudinal direction) except for the light guide holder fixing portion 802, respectively. A plurality of continuous plate-like end portions (on the light guide holder 5 side), 805 is a connection interface for attaching the plate-like member 8 which is a housing of the light source device to the image reading device main body (or the carriage of the image reading device). A screw hole 806 as a means has a screw hole through which the screw 10 is passed, is formed in the plate-like member 8, and is a fastening part to which the light guide holder 5, the light emitting part 3, and the heat transfer body 9 are fastened by the screw 10. is there. The illustration of the carriage is omitted. The plate member 8 and the screw hole 805 around the screw hole 805 may be eliminated, and the fastening portion 806 may be used as an end portion (side surface in the short direction) of the plate member 8. Reference numeral 807 denotes a reflected light passage hole (aperture) through which reflected light of light irradiated to a reading target (original, bill, etc.) of the image reading apparatus formed on the plate-like member 8 passes. The conveyance direction of the reading target is the short direction of the light source device (the sub-scanning direction of the image reading device, simply referred to as the sub-scanning direction). The main scanning direction and the sub-scanning direction intersect each other and are generally orthogonal. Reference numeral 808 denotes an integral end portion in which the tips of the plate-like end portions 803 are integrated. In the drawings, the same reference numerals denote the same or corresponding parts, and detailed descriptions thereof are omitted.

  Even if the shape of the end surface 4a of the light guide 4 and the shape of the longitudinal section of the light guide 4 in the light source device according to Embodiment 1 are not cylindrical as shown in FIGS. It may be polygonal, gourd or distorted. Of course, a combination of these may be used. Similarly, the outer shape of the light guide holder 5 at the portion to be inserted into the holder 7 and the inner shape of the holder 7 at the portion into which the light guide holder 5 is inserted are not cylindrical, but are polygonal or gourd. However, it may be a distorted shape. Of course, a combination of these may be used. The relationship between the light guide holder 5 and the holder 7 is that the portion of the light guide holder 5 inserted into the holder 7 is in contact with the holder 7 so that the light guide holder 5 can be slid. The light guide holder 5 can be expanded or contracted without the portion inserted into the holder 7 being in contact with the holder 7. Although details will be described later, even if the portion of the light guide holder 5 inserted into the holder 7 does not come into contact with the holder 7, most of the light emitted from the light emitting unit 3 is the holder 7 and the light guide holder 5. It is necessary not to leak from the gap.

  The light guide holder 5 not only holds the light guide 4 but also functions to suppress unintended light from the light emitting unit 3 and the light guide 4. The light guide holder 5 is positioned on the plate-like member 8 at an appropriate position with respect to the housing (plate-like member 8) at the following three points. The three points are the two first protrusions 5b, the two long holes 8b, the second protrusion 5c, and the fitting hole 8c. The light guide holder 5 is shorter than the total length of the plate-like member 8, the end face of the light guide holder 5 is opposed to the end face of the holder 7, and the gap length is wider than the elongation due to the temperature characteristics of the light guide holder 5. . As described above, since the light guide 4 is not completely fixed in the longitudinal direction, the light guide 4 is held in the short direction without warping even when the light guide holder 5 expands and contracts due to temperature change. . The light guide holder 5 holds the entire periphery of the light guide 4 at the end, and has an opening (light guide holder 5) that exposes the light emitting portion 4b at the center. A portion of the light guide holder 5 that holds the entire periphery of the light guide 4 at the end is inserted into the holder 7.

  FIG. 1 shows a light source device before the light guide holder 5 is placed on a plate-like member 8 that is a housing of the light source device in the light source device according to the first embodiment. As shown in FIG. 1, the light guide holder 5 is formed with holes covering the periphery of the end face 4 a of the light guide 4 at both ends in the longitudinal direction. The light guide holder 5 in the hole covering the end face 4a can be inserted into the holder 7 (in the case of the first embodiment). The holder 7 has a first opening and a second opening that communicate with each other, and the light guide 4 supported by the end of the light guide holder 5 and the light guide holder 5 is elongated on the first opening side of the holder 7. It can be said that it is slidable in the direction. In the present application, the light guide 4 and the light guide holder 5 will be described on the assumption that resins having the same or similar expansion rate are used.

  In the light guide 4 of the light source device according to Embodiment 1, the protrusions 4d are inserted and fitted into the fitting holes 5d of the light guide holder 5, and both ends are both ends of the light guide holder 5. It is arranged inside the hole in the part. Further, the light guide locking portion 5a does not fix the expansion and contraction of the light guide 4 in the longitudinal direction, but restricts the warping and bending of the light guide 4 in the longitudinal direction. This is to prevent the light body holder 5 from coming off. Since the light guide 4 and the light guide holder 5 only need to have a mechanism that can be fitted to each other, the relationship between the protrusion 4d and the fitting hole 5d is reversed to form a fitting hole in the light guide 4. However, a protrusion may be formed on the light guide holder 5.

  As shown in FIG. 1, there are two pins held by the substrate 2 and the heat transfer body 9 on the surface (second opening side) opposite to the surface (first opening side) where the light guide holder 5 is inserted in the holder 7. Pin holes are respectively formed in the substrate 2 and the heat transfer body 9 so as to correspond to these pins. By stacking the substrate 2 and the heat transfer body 9, passing the pins of the holder 7 through the pin holes, and fixing the substrate 2, the heat transfer body 9, and the holder 7 to the fastening portion 6 of the plate-like member 8 with the screws 10. In the light source device according to the first embodiment, the light emitting element 1 (light emitting unit 3) is disposed in the second opening of the holder 7, and the optical filter 6 is disposed between the first opening and the second opening of the holder 7. The light emitting unit 3 and the light emitting unit 3 are supported while maintaining a predetermined distance. Details will be described with reference to FIG. In the present application, the light guide 4 is described using the light emitting section 3 and the holder 7 formed on both end faces. However, the light emitting section 3 and the holder 7 are formed only on one end face of the light guide 4. It's okay. In this case, of course, the holder 7 in a state in which the second opening is blocked and the light emitting unit 3 is not provided may be disposed at the end of the light guide 4 that does not have the light emitting unit 3. In addition, a reflecting member may be formed inside the holder 7 in this state (including the end face of the light guide 4) instead of the optical filter 10.

  FIG. 2 shows a plate-like member 8a before bending of the plate-like member 8 that becomes the casing of the light source device according to the first embodiment. The plate-like member 8 is formed of a sheet metal with good heat dissipation such as aluminum. The plate-like member 8a includes a long hole 8b, a fitting hole 8c, a reflector support portion 801 (plate-like end portion 803), a light guide holder fixing portion 802 (plate-like end portion 804), a screw hole 805, and a fastening portion. 806, notches and holes (holes) for forming the reflected light passage hole 807 are provided. By bending the plate member 8a along the one-dot chain line and the two-dot chain line shown in FIG. 2, the plate member 8 serving as the casing of the light source device according to the first embodiment is obtained. Specifically, the plate-like member 8a shown in FIG. 2 is valley-folded along the two-dot chain line. Similarly, the plate-like member 8a shown in FIG. 2 is valley-folded along the alternate long and short dash line, but the portion corresponding to the reflector support portion 801 is located on the outer peripheral side of the plate-like member 8a in order to support the reflector 11. The alternate long and short dash line is a mountain fold. Since the expressions “valley fold” and “mountain fold” are relative expressions to the surface (front surface) side of the plate-like member 8a shown in FIG. 2, they are opposite to the surface (front surface) of the plate-like member 8a shown in FIG. When viewed from the front surface (back surface), the folding method between the valley fold and the mountain fold is reversed.

  More specifically, by bending the plate-like member 8a inward (front side with respect to the drawing) at the two-dot chain line portion shown in FIG. 2, the cross section in the sub-scanning direction (short side direction) is box-shaped. A U-shaped casing (plate-like member 8) is formed. That is, by bending, a bottom portion (bottom surface) having a rectangular shape and a long side wall portion (plate-like end portion 803, plate-like end portion 804, integral end portion) bent inwardly on one long side of the bottom portion 808), and has a short side wall portion (fastening portion 806) which is bent inward at a predetermined angle from the short side direction of the bottom portion and is bent inward to the short side of the bottom portion on the other long side of the bottom portion. . A heat radiating plate which is continuous with the short side wall portion, is bent in the longitudinal direction, and extends in the longitudinal direction so as to face the slope portion 801 (reflecting plate support portion 801) in a direction opposite to the long side wall portion. It may be formed (not shown, but a heat radiating plate is formed on the side opposite to the reflecting surface of the reflecting plate 11). Further, as described above, the plate-like member 8 and the screw hole 805 around the screw hole 805 are eliminated, and the short side wall portion (fastening portion 806) is used as the end portion (side surface in the short direction) of the plate-like member 8. (The illustration is omitted).

  A description will be given of fixing the light guide holder 5 and the holder 7 to the bent plate-like member 8 with reference to FIG. First, in FIG. 3, the second protrusion 5 c of the light guide holder 5, which is not shown directly behind the light guide holder 5, is inserted into the fitting hole 8 c of the plate-like member 8. Fit. At that time, the first protrusion 5 b of the light guide holder 5 is simultaneously inserted into the long hole 8 b of the plate-like member 8. In addition, the 1st projection part 5b is inserted in the long hole 8b so that the movement to a longitudinal direction is possible. Thereby, the position of the light guide holder 5 in the longitudinal direction can be held in a state along the main scanning direction of the light source device. Since the light guide holder 5 and the plate-like member 8 only need to have a mechanism that can be fitted to each other, the relationship between the second protrusion 5c and the fitting hole 8c is reversed to fit the light guide holder 5. A hole may be formed to form the second protrusion on the plate-like member 8. The same applies to the relationship between the first protrusion 5b and the long hole 8b.

  Then, the holder 7 is fixed to the fastening portion 806 of the plate-like member 8 using the screw 10. At this time, the substrate 2 and the heat transfer body 9 are also fastened together with the holder 7 and the screw 10. Therefore, the heat generated in the substrate 2 is efficiently transmitted to the plate-like member 8 (fastening portion 806) through the heat transfer body 9, and the heat generated in the substrate 2 is exhausted. For example, the heat transfer body 9 is formed of a sheet-like silicone sheet having a function of transferring heat, and has good adhesion and thermal conductivity. As described above, the heat transfer body 9 is disposed between the substrate 2 and the fastening portion 806. The plate-like member 8 has a role of releasing heat of the light emitting unit 3 (light emitting element 1, substrate 2). The heat generated from the light emitting unit 3 is transmitted to the fastening unit 806 through the substrate 2 and the heat transfer body 9. Heat is dispersed from the fastening portion 806 to the entire plate member 8. Heat is dispersed from the fastening portion 806 to the entire plate member 8.

  4 to 7 show the light source device according to the first embodiment. That is, FIGS. 4 to 7 show the light guide holder 5 and the holder 7 after being fixed to the plate member 8 after being bent. In addition, the fastening part 806 to which the light emission part 3 (board | substrate 2) is fastened is fastened to the part bent in the longitudinal direction of the plate-shaped member 8 (plate-shaped member 8a) directly or via the heat exchanger 9. You can say that. 4 to 7, in the thickness direction (height direction), the plate-like end portion 803 and the plate-like end portion 804 are shorter than the light guide holder 5, the holder 7, and the reflection plate 11. The size of the plate-like member 8 (plate-like member 8a) may be changed so that the plate-like end portion 803 and the plate-like end portion 804 are higher than the light guide holder 5, the holder 7, and the reflecting plate 11.

  FIG. 8 is a cross-sectional view around the center in the longitudinal direction of the light guide 4 in the light source device according to Embodiment 1. FIG. As shown in FIG. 8, the light guide 4 is fixed in the vicinity of the center of the light guide 4 by the light guide holder 5 (fitting hole 5d) by the protrusion 4d. Since it is inserted into the hole of the light guide holder 5, expansion and contraction in the longitudinal direction of the light guide 4 due to temperature change is not limited by the light guide holder 5. The light guide holder 5 is fixed around the center of the light guide holder 5 by the plate-like member 8 (fitting hole 8c) via the second protrusion 5c, but the first protrusion 5b is a long hole 8b. Therefore, expansion and contraction in the longitudinal direction of the light guide holder 5 due to temperature change is not limited by the plate-like member 8.

  4 to 8, the light guide holder 5 covers the light guide 4 in the longitudinal direction except at least the side surface 4b (light emitting portion 4b) from which the light guide 4 emits light. I understand that. In particular, from FIG. 8, the light guide holder 5 has two first protrusions 5b and is placed on a plate-like member 8 extending in the longitudinal direction, and the plate-like member 8 is formed in the longitudinal direction. It can be seen that the first protrusion 5b is inserted into the long hole 8b. Similarly, the light guide holder 5 has a second protrusion 5c, and the plate-like member 8 has a fitting hole 8c formed on the side opposite to the light emitting part 3 with respect to the long hole 8b along the longitudinal direction. It can be seen that the second protrusion 5c is inserted into the fitting hole 8c. When the second protrusion 5c is formed at the center of the light guide 4 in the longitudinal direction, the second protrusion 5c extends from the center of the light guide 4 even when the light guide 4 expands or contracts due to a change in ambient temperature. It will shrink. In particular, the second protrusion 5c and the fitting hole 5d of the light guide holder 5 may be arranged so as to be in the same cross section in the sub-scanning direction (short direction).

  Therefore, as described above, when the light guide 4 and the light guide holder 5 are made of a material having a similar expansion rate, the second protrusion 5c is formed at the center of the light guide 4 in the longitudinal direction. Thus, the light guide 4 does not protrude from the light guide holder 5. Of course, even when the expansion rate of the light guide 4 is larger than the expansion rate of the light guide holder 5, the light guide 4 is formed by forming the second protrusion 5c at the center of the light guide 4 in the longitudinal direction. It is easy to adjust the length in the longitudinal direction that does not protrude from the light guide holder 5. In this case, the thickness of the hole covering the periphery of the end surface 4a of the light guide 4 in the light guide holder 5 formed at both ends in the longitudinal direction is not dropped from the hole (light guide holder 5). It is necessary to do so. Of course, even when the light guide 4 comes out of the hole (light guide holder 5), the posture of the light guide 4 is maintained by the fitting state between the light guide 4 and the light guide holder 5 and the light guide locking portion 5a. There is no problem if you can.

  Further, even when the light guide 4 is set to a dimension in which the light guide 4 (the end surface 4a of the light guide 4) protrudes from the light guide holder 5 due to the expansion of the light guide 4, the second protrusion 5c is Since the light guide 4 is formed at the center of the light guide 4 in the longitudinal direction, the length of the light guide 4 protruding from the light guide holder 5 is the same in the light guide holders 5 at both ends. Therefore, in consideration of the length of the protruding light guide 4, the light guide holder 5 and the holder 7 (the optical filter in the holder 7 are prevented from contacting the light guide 4 and the holder 7 (the optical filter 6)). 6 position) may be set.

  Next, the operation of the light source device according to Embodiment 1 as illumination will be described with reference to FIGS. The light source device is used as illumination of the image reading device, and FIG. 10 shows a top plate (document setting table) of the reading device and a reading target of the image reading device. As shown in FIG. 9, light emitted from the light emitting element 1 (light emitting unit 3) is selected by the optical filter 6 as light having a specific wavelength (light having a specific wavelength is blocked), and is incident on the light. The light enters the light guide 4 from the portion 4a (end surface 4a). Alternatively, excitation light generated by the optical filter 6 (may be composite light including light having a wavelength that has not been converted) is incident on the light guide 4 from the light incident portion 4a (end surface 4a). The incident light from the light emitting element 1 through the optical filter 6 is guided in the longitudinal direction while reflecting the wall surface inside the light guide 4. A solid line arrow in FIG. 9 shows an example of an optical path of light emitted from the light emitting element 1. The light-emitting unit 3 is a light source element (light-emitting element 1) such as an LED light source that receives light from the end face 4a of the light guide 4. The light-emitting unit 3 is fixed to the substrate 2 by soldering or the like, and is driven by the substrate 2 to drive light. To do. In the present application, illustration of wiring inside and outside the substrate 2 is omitted.

  As described above, when the light guided while reflecting the inside of the light guide 4 hits the light scattering pattern 4c formed on the light guide 4, the side surface 4b (light emitting portion) facing the light scattering pattern 4c. 4b). The light scattering pattern 4c may be printed on the light guide 4 or may be a prism pattern having irregularities on the surface of the light guide 4. Needless to say, the shape of the light scattering pattern 4c may be changed in the main scanning direction. That is, the light guide 4 is formed of a transparent resin, extends in the longitudinal direction, has a cylindrical shape, and has a columnar shape having two light scattering patterns 4c extending in the entire longitudinal direction. As described above, the side surface shape of the light guide 4 is not limited to a cylinder, and the end surface of the light guide 4 is not limited to a circle.

  In FIG. 10, the light (main light) emitted from one light emitting unit 4 b travels obliquely with respect to the sub-scanning direction, and is irradiated to the reading target via the top plate (transparent plate) of the reading device. The The light (secondary light) emitted from the other light emitting part 4b travels at a “substantially parallel” or “shallow angle with respect to the light emitted from one light emitting part 4b” and reflected. The light is reflected by the plate 11 and irradiated to the reading object via the top plate (transparent plate) of the reading device. That is, the reflector 11 is arranged in parallel with the light guide 4 in the longitudinal direction, reflects the secondary light emitted from the light guide 4 and irradiates it in the reading target direction. It is configured, extends in the longitudinal direction, and is a thin plate or sheet. The reflecting plate 11 maintains an appropriate distance and angle with respect to the light guide 4, the top plate (transparent plate) of the reading device, and the reading target. Depending on the optical path, “main light” and “sub-light” are distinguished, but this does not indicate the superiority or inferiority of various conditions of light such as light quantity and luminance.

  The light emitted from the light guide 4 and applied to the reading object is reflected by the reading object, and passes through the reflected light passage hole 807 to form an imaging optical system (reduction optical system, erecting equal magnification optical system) of the reading apparatus. System, off-axial optical system, telecentric (both telecentric) optical system, etc.) and imaged by the light receiving unit. The top plate of the reading device is not an essential component, but when the top plate is present, the arrangement of the light emitting unit 4b and the light scattering pattern 4c of the light source device is determined in consideration of the refractive index of the top plate. There is a need to. Further, the reading target may be transported (moved in the sub-scanning direction) or the carriage (image reading device) on which the light source device is mounted may be transported (moved in the sub-scanning direction). . Although illustration is omitted, when the imaging optical system to which the light source device according to Embodiment 1 (this application) is an erecting equal-magnification optical system, the reflected light passage hole 807 extending in the main scanning direction is a rod lens. It is good also as the rod lens holding | maintenance part 807 holding (rod lens array). In this case, the one-dot chain line shown in FIG. 10 is the optical axis of the rod lens. Further, a substrate (sensor substrate) having a light receiving portion (sensor) formed at one focal point of the rod lens is disposed below the rod lens holding portion 807 (if the rod lens is not held in the reflected light passage hole 807). The sensor substrate may be directly or indirectly held by the plate-like member 8. In this case, the plate-like member 8 also serves as a housing of the image reading apparatus.

  Detailed configurations and modifications of the plate-like member of the light source device (reflecting plate support structure) according to Embodiment 1 will be described with reference to FIGS. 13A is a diagram corresponding to the cross section of the light source device taken along the dashed-dotted line GH in FIG. 5, FIG. 13B is a diagram equivalent to the cross section of the light source device taken along the dashed-dotted line IJ in FIG. FIG. 14B is a diagram corresponding to the cross section of the light source device taken along the alternate long and short dash line IJ of FIG. 5, and FIG. 14A is the dashed line GH shown in FIG. FIG. 14B is a diagram corresponding to the cross section of the light source device taken along the alternate long and short dash line IJ in FIG.

  15A is a diagram corresponding to the cross section of the light source device taken along the dashed-dotted line GH in FIG. 5, FIG. 15B is a diagram equivalent to the cross section of the light source device taken along the dashed-dotted line IJ in FIG. FIG. 16A is a diagram corresponding to a cross section of the light source device taken along the alternate long and short dash line GH of FIG. 5, FIG. 16B is a diagram corresponding to a cross section of the light source device taken along the alternate long and short dash line GH of FIG. It is a figure corresponded in the cross section of the light source device by. FIG. 17A is a plan view (before bending) of a plate-like member that serves as a housing of the light source device (reflecting plate support structure), and FIG. 17B is a light source device (reflecting plate support structure) shown by a one-dot chain line GH in FIG. FIG. 17C is a diagram corresponding to the cross section of the light source device (reflecting plate support structure) taken along the alternate long and short dash line IJ in FIG.

  14, 15, and 16, 801 e is an extended reflector support portion that is connected to the tip portion of the reflector support portion 801 that is extended and bent with respect to the sub-scan direction with respect to the main scan direction, and 802 e is a guide. An extended light guide holder fixing portion 803e, in which the distal end portion of the optical body holder fixing portion 802 is extended and is bent and connected with respect to the sub-scanning direction with respect to the main scanning direction, is provided with an extended plate-like end portion 803 (reflecting plate 11 The extended plate-like end portion (reflecting plate 11 side) is extended and connected to the main scanning direction with respect to the sub-scanning direction, and 804e is the extended plate-like end portion 804 (light guide). This is an extended plate-like end portion (on the light guide holder 5 side) that is extended and connected to the sub-scanning direction with respect to the main scanning direction. Reference numeral 801b denotes a reflection plate support portion 801 that is a reflection plate support portion (slope portion) having a portion bent at one place with respect to the sub-scanning direction with respect to the main scanning direction. With respect to the reflector support part 801b (slope part 801b), the reflector support part 801 (slope part 801) has two bent portions with respect to the sub-scanning direction with respect to the main scanning direction. 8s is a flat plate-like member before the plate-like member 8 is bent. In the drawings, the same reference numerals denote the same or corresponding parts, and detailed descriptions thereof are omitted.

  As shown in FIG. 11A, the reflecting plate support portion 801 is disposed on the surface of the reflecting plate 11 opposite to the surface that reflects the light emitted from the side surface 4b of the light guide 4 and extends along the main scanning direction. Thus, the plurality of members are arranged at predetermined intervals and support the reflecting plate 11. The plurality of reflecting mirror support portions 801 are each formed by bending one end of the plate-like member 8 along the main scanning direction. Therefore, the plurality of reflecting mirror support portions 801 are formed by bending the plate-like member 8 that supports the reflecting mirror support portion 801, and thus are integral with the plate-like member 8, and are It can be said that it stands up with an angle with respect to the sub-scanning direction with respect to the scanning direction. Further, it can be said that the reflection plate support 801 has a portion bent with respect to the sub-scanning direction with respect to the main scanning direction.

  Since a plurality of reflecting mirror support portions 801 of the light source device (reflecting plate support structure) according to Embodiment 1 are formed, the main scanning direction can be simply set for each reflecting mirror support portion 801 by setting the arrangement and the inclination angle. And the installation accuracy of the reflecting mirror 11 in the sub-scanning direction can be easily obtained. That is, it is possible to prevent deterioration of the installation accuracy of the reflecting mirror 11 due to warping or bending of one plate in the main scanning direction and the sub-scanning direction, which occurs when a single plate is used as the support portion of the reflecting mirror 11. . Further, since the plurality of reflecting plate support portions 801 are intermittently arranged along the main scanning direction and support the reflecting plate 11, this occurs when the reflecting mirror 11 is supported only by the end portion of the reflecting mirror 11. In addition, it is difficult for the reflecting mirror 11 to be bent by its own weight. The plurality of reflecting plate support portions 801 have a portion bent with respect to the sub-scanning direction in addition to the base end portion having an angle with respect to the plate-like member 8. That is, the plate-like member 8 is bent at two places.

  The plate-like member 8 shown in FIGS. 11A and 11B has a plurality of plate-like ends where portions other than the plurality of reflecting mirror support portions 801 are continuous with the plate-like member among one ends along the main scanning direction. Part 803. The bent plate-like end portion 803 increases the strength of the light source device (reflecting plate support structure) according to Embodiment 1, and is less likely to warp or bend. Further, the length of the plate-like end portion 803 in the main scanning direction is longer than the length of the reflecting mirror support portion 801 in the main scanning direction, so that a connection interface with the carriage (image reading device) of the image reading device is provided. In addition to increasing the formation area of a screw hole as a means (a screw hole having the same function as the screw hole 805), the strength of the plate-like end 803 as a connection interface means is also increased. Of course, the strength of the light source device (reflection plate support structure) according to Embodiment 1 is further increased. It can be said that the plate-like end portion 803 has a portion bent with respect to the sub-scanning direction with respect to the main scanning direction.

  As shown in FIG. 11B, the light guide holder fixing portion 802 is a plurality of members that are arranged at predetermined intervals along the main scanning direction and fix the light guide holder 5. One light guide holder fixing portion 802 may be provided. The plurality of light guide holder fixing portions 802 are formed by bending the other end of the plate-like member 8 along the main scanning direction in two places. Therefore, since the plurality of light guide holder fixing portions 802 are formed by bending the plate-like member 8, like the reflector support portion 801, they are integrated with the plate-like member 8, and are attached to the plate-like member 8. It can be said that it stands up with an angle with respect to the sub-scanning direction with respect to the main scanning direction. Furthermore, it can be said that the light guide holder fixing portion 802 has a portion bent with respect to the sub-scanning direction with respect to the main scanning direction.

  The plate-like member 8 shown in FIGS. 11A and 11B has a plurality of portions other than the plurality of light guide holder fixing portions 802, which are continuous with the plate-like member, at the other end along the main scanning direction. It has a plate-like end 804. The bent plate-like end portion 804 increases the strength of the light source device (reflecting plate support structure) according to Embodiment 1, and is less likely to warp or bend. Further, the length of the plate-shaped end portion 804 in the main scanning direction is longer than the length of the light guide holder fixing portion 802 in the main scanning direction, so that the image reading apparatus is similar to the plate-shaped end portion 803. In addition to increasing the formation area of screw holes (screw holes having the same function as the screw holes 805) as connection interface means with the carriage (image reading apparatus), a plate-like end 804 as connection interface means The strength of is also increased. Of course, the strength of the light source device (reflection plate support structure) according to Embodiment 1 is further increased. It can be said that the plate-like end portion 804 has a portion bent with respect to the sub-scanning direction with respect to the main scanning direction.

  A plate-like member 8a (plate-like member 8) shown in FIGS. 12 and 13 is a modification of the plate-like member 8a (plate-like member 8) in the light source device (reflecting plate support structure) according to the first embodiment. . The plate-like member 8a (plate-like member 8) shown in FIGS. 12 and 13 has a distal end side along the sub-scanning direction from the base end side that is continuous with the plurality of reflector support portions 801 of the plurality of plate-like end portions 803. , Integrated end portions 808 that are connected and integrated are formed. The integrated end portion 808 increases the strength of the plurality of plate-shaped end portions 803. Further, a screw hole (a screw hole having a function similar to that of the screw hole 805) as a connection interface unit with the carriage (image reading apparatus) of the image reading apparatus may be formed in the integrated end portion 808.

  The light source device (reflector support structure) described in FIGS. 14A and 14B is a modification of the reflector support portion 801 in the light source device (reflector support structure) according to the first embodiment. The reflector support portion 801 shown in FIG. 14A has an extended reflector support portion 801 e in which a distal end portion is extended with respect to a base end portion having an angle with respect to the plate-like member 8. Since the reflection plate support portion 801 and the extended reflection plate support portion 801e are bent, the strength of the reflection plate support portion 801 is increased. Further, the extended reflecting plate support portion 801e can apply a surplus generated in the plate member 8 (plate member 8a) due to a dimensional difference between the plate member 8 (plate member 8a) and the reflecting plate 11. A plate-like end portion 803 shown in FIG. 14B has an extended plate-like end portion 803 e in which a distal end portion is extended with respect to a base end portion having an angle with respect to the plate-like member 8. Since the portion between the plate-like end portion 803 and the extended plate-like end portion 803e is bent, the strength of the plate-like end portion 803 is increased. A screw hole (a screw hole having a function similar to that of the screw hole 805) as a connection interface means with the carriage (image reading device) of the image reading device is provided in the extended reflecting plate support portion 801e and the extended plate-like end portion 803e. May be formed.

  The light source device (reflector support structure) shown in FIGS. 15A, 15B, and 15C is the reflector support portion 801 and the light guide holder fixing in the light source device (reflector support structure) according to the first embodiment. This is a modification of the portion 802, the plate-like end portion 803, and the plate-like end portion 804. The light source device (reflecting plate support structure) shown in FIG. 15 has a configuration in which an extended light guide holder fixing portion 802e and an extended plate-like end portion 804e are added to the light source device (reflecting plate support structure) shown in FIG. Therefore, the extension light guide holder fixing portion 802e and the extension plate end portion 804e will be described. The explanation of the extended reflector support portion 801e and the extended plate-like end portion 803e is as described above.

  The plate-like end portion 804 shown in FIG. 15A has an extended plate-like end portion 804 e in which a distal end portion is extended with respect to a base end portion having an angle with respect to the plate-like member 8. Since the portion between the plate-like end portion 804 and the extended plate-like end portion 804e is bent, the strength of the plate-like end portion 804 is increased. The light guide holder fixing portion 802 illustrated in FIG. 15B is an extended light guide in which a bent distal end portion is extended with respect to a base end portion having an angle with respect to the plate-like member 8. It has a holder fixing part 802e. Since the space between the light guide holder fixing portion 802 and the extended light guide holder fixing portion 802e is bent opposite to the light guide holder 5 side, the strength of the light guide holder fixing portion 802 is increased. The light guide holder fixing portion 802 illustrated in FIG. 15C is an extended light guide in which a bent distal end portion is extended with respect to a base end portion having an angle with respect to the plate-like member 8. It has a holder fixing part 802e. Since the space between the light guide holder fixing portion 802 and the extended light guide holder fixing portion 802e is bent toward the light guide holder 5 side, not only the strength of the light guide holder fixing portion 802 is increased, The light guide holder 5 is more firmly fixed.

  The difference between FIG. 15B and FIG. 15C is the difference in the bending direction of the extended light guide holder fixing portion 802e with respect to the light guide holder fixing portion 802. The extended light guide holder fixing portion 802e shown in FIG. 15 is a surplus produced in the plate member 8 (plate member 8a) due to the difference in dimensions between the plate member 8 (plate member 8a) and the light guide holder 5. You can count on minutes. Similar to the extension reflector support 801e and the extension plate end 803e, the extension plate end 804e has a screw hole (screw hole 805) serving as a connection interface with the carriage (image reading device) of the image reading device. A screw hole having a function similar to that in FIG. Moreover, the cross section of the reflecting plate supporting portion 801 is as shown in FIG. 15A for both FIG. 15B and FIG.

  The light source device (reflector support structure) described in FIGS. 16A and 16B is a modification of the reflector support portion 801 in the light source device (reflector support structure) according to the first embodiment. The reflecting plate support portion 801 described in FIGS. 11, 13, 14 and 15 has a portion bent at two places with respect to the sub-scanning direction with respect to the main scanning direction. Specifically, the reflector support part 801 is bent in different directions. In FIGS. 14 and 15, the space between the reflecting plate support portion 801e and the reflecting plate support portion 801 is further bent. On the other hand, the reflector support portion 801b shown in FIG. 16A has a portion bent at one place with respect to the sub-scanning direction with respect to the main scanning direction. Since the reflector support portion 801b has only one bend, the process of processing the plate-like member 8a can be reduced. In addition, the angle for supporting the reflecting plate 11 is adjusted only once. Of course, in the light source device (reflector support structure) shown in FIGS. 16A and 16B, as shown in FIGS. 12 to 15, the integrated end 808, the extended reflector support 801e, and the extended light guide holder You may add at least one of the fixing | fixed part 802e, the extended plate-shaped edge part 803e, and the extended plate-shaped edge part 804e.

  The light source device according to the first embodiment can obtain a light source device with a small illumination at the end portion of the light guide 4, the light guide holder 5, the holder 7, the substrate 2, and the reflection plate 11 and with good illumination efficiency. The reflector support structure according to Embodiment 1 can be obtained with a small end deviation of the reflector 11. Moreover, until now (FIGS. 1 to 16), the reflector support structure according to Embodiment 1 has been described as an element incorporated in the light source device, but the reflector support structure alone can also be implemented. Explain that. FIG. 17 shows a reflector support structure according to the first embodiment. FIG. 17A shows a plate-like member 8s before the plate-like member 8 serving as a casing of the reflector support structure is bent. The difference between the plate-like member 8s and the plate-like member 8a is that there is no mechanism for supporting the light guide holder 5 and the holder 7 and there is no reflected light passage hole 807. However, when the reflector support structure shown in FIG. 17 is used for the same application as that of the light source device according to Embodiment 1, the reflected light passage hole 807 may or may not be formed. In other words, this means that the reflector support structure according to Embodiment 1 can be applied to a structure that supports the reflector (reflector, concave mirror, convex mirror) in the imaging optical system of the image reading apparatus. Yes. In this case, the screw hole 805 may be used for connection with a member other than the carriage of the image reading apparatus.

  FIGS. 17B and 17C are cross-sectional views of the reflector support structure. The plurality of reflection plate support portions 801 are disposed on the surface opposite to the reflection surface of the reflection plate 11 and are integrated with the plate-like member 8 that supports the plurality of reflection mirror support portions 801. Further, the plurality of reflecting plate support portions 801 stand with an angle with respect to the plate-like member 8 with respect to the sub-scanning direction with respect to the main-scanning direction, and each follow the main-scanning direction of the plate-like member 8. It is formed by bending one end.

  It can be said that the reflector support structure shown in FIGS. 17B and 17C is only on the reflector 11 side of the reflector support structure (light source device) shown in FIGS. 4 to 8, 10, and 11. Therefore, like the reflector support structure (light source device) shown in FIGS. 4 to 8, 10, and 11, the reflector support structure shown in FIGS. At least one of the plate support portion 801e and the extended plate-like end portion 803e may be added. Moreover, you may substitute the reflecting plate support part 801 with the reflecting plate support part 801b. Further, after replacement, at least one of the integrated end portion 808, the extended reflector support portion 801e, and the extended plate-like end portion 803e may be added.

  Due to such a structure, the light source device (reflector support structure) according to the first embodiment is a support structure for a reflector (first mirror, second mirror,...) In the imaging optical system of the image reading apparatus. It is possible to implement only as well. In this case, directions indicated by arrows X, Y, and Z in FIG. 17 are reference information. Further, the present invention can be implemented only as a support structure for the reflection plate that reflects the above-mentioned sub-light. Therefore, when the reflection plate support structure is used as a configuration of a light source device (a light source device used for an image reading device), the arrival source of light reflected by the reflection plate 11 is disposed to face the reflection plate 11 and is mainly used. It may be a rod-shaped light source or an array light source extending in the scanning direction. Of course, the rod-shaped light source includes a light emitting unit 3 and a columnar light guide 4 that guides light from the light emitting unit 3 incident from the end surface 4a in the longitudinal direction and emits the light from the side surface 4b. It is out. Furthermore, the rod-shaped light source in the light source device according to Embodiment 1 may be a discharge lamp. The discharge lamp may be a general one such as a discharge lamp using glow discharge such as a neon tube, or a discharge lamp using arc discharge such as a fluorescent lamp or a xenon lamp (Xe lamp).

  The array light source in the light source device according to Embodiment 1 may be one in which a plurality of light emitting units 3 (light emitting elements 1) are arranged in the main scanning direction and emit light (sub light) in the sub scanning direction. A plurality of (light emitting elements 1) may be arranged in the main scanning direction, and light (sub light) may be emitted in the sub scanning direction by a light guide member or a reflecting member. Of course, the array light source may emit not only the secondary light but also the main light, or may emit both. Furthermore, in order to obtain main light and sub light, an array light source arranged in a different arrangement may be employed. That is, the array light source arranged for the main light and the array light source arranged for the sub-light are arranged in two rows along the main scanning direction (the two rows here include a staggered arrangement). .

  Detailed configurations and modifications of the light guide holder 5 and the holder 7 of the light source device according to Embodiment 1 will be described with reference to FIGS. Specifically, it will be described that the end portion deviation of the light guide 4 or the like is small regardless of the temperature characteristics of the light guide 4 constituting the light source device according to Embodiment 1. In consideration of expansion and contraction in the thickness direction of the light guide 4 and the light guide holder 5 of the light source device according to Embodiment 1, the light guide 4, the light guide holder 5, and the holder 7 are arranged. Needless to say. For example, it is assumed that the dimensions of the light guide holder 5 and the holder 7 are set so that the light guide holder 5 does not damage the holder 7 when the expansion is maximum. However, since the influence is very small compared with the expansion and contraction of the light guide 4 and the light guide holder 5 in the longitudinal direction, the detailed description is omitted. 18A is a cross-sectional view of the periphery of the light emitting unit of the light source device taken along the alternate long and short dash line EF of FIG. 5, FIG. 18B is a cross-sectional image of only the holder 7 portion of FIG. 18A, and FIG. FIG. 19B is a cross-sectional view around the light-emitting portion of the light source device taken along the alternate long and short dash line EF of FIG. 5, and FIG. 19C is a light source taken along the dashed-dotted line EF of FIG. FIG. 20A is a cross-sectional view of the vicinity of the center of the light guide of the device, FIG. 20A is a view corresponding to a cross-section of the light-emitting device periphery of the light source device along the alternate long and short dash line EF of FIG. 21 (a) is a diagram corresponding to a cross section around the light emitting unit of the light source device taken along one-dot chain line EF in FIG. 5, and FIG. 21 (b) is a sectional image diagram of only the holder 7 portion in FIG. 21 (a). is there. In the drawings, the same reference numerals denote the same or corresponding parts, and detailed descriptions thereof are omitted.

  As shown in FIGS. 18 and 19, the holder 7 has a first opening (a portion indicated by a dotted arrow in FIG. 18B) and a second opening (a portion indicated by a dotted arrow in FIG. 18B) communicating with each other. Have. The holder 7 holds the end of the light guide holder 5 slidably in the longitudinal direction on the first opening side. On the other hand, the holder 7 has the light emitting unit 3 disposed in the second opening. Further, the holder 7 supports the optical filter 6 between the first opening and the second opening while maintaining a predetermined distance from the light emitting unit 3. The optical filter 6 is supported by the holder 7 outside the range in which the end face of the light guide moves by sliding of the end of the light guide holder 5. In FIG. 18 and FIG. 19, the light emitting unit 3, in particular, the light emitting element 1 is disposed in the second opening of the holder 7. However, the present invention is not limited to this arrangement. The light emitting unit 3 may be arranged so that the light emitted from the light enters the light guide 4 through the second opening and the first opening of the holder 7.

  The light guide holder 5 is formed of a white resin or a metal having good reflectivity, and has a groove portion formed by a long groove in the longitudinal direction. The light guide body 4 is disposed in the groove portion and guided in the longitudinal direction. The light body 4 is held. The opening side of the groove portion is an emission region (light emission portion 4b) from which light is emitted from the light guide 4. The light guide holder 5 holds the light guide 4 at an appropriate position with respect to the reflector 11 and the plate-like member 8 and guides light leaked from the side surface and the back surface of the light scattering pattern 4c. It pushes back into the body 4 by reflection and plays a role of suppressing unintended light emission from other than the light emitting part 4b.

  Next, referring to FIG. 19, the light source device according to Embodiment 1 supports the optical filter 6 between the first opening and the second opening of the holder 7 while maintaining a predetermined distance from the light emitting unit 3. That is, the end surface 4a (light incident portion 4a) of the light guide 4 and the light emitting portion 3 (optical filter 6) are not in contact with each other. FIG. 19A shows a case where the length of the light guide 4 in the longitudinal direction is the shortest. FIG. 19B shows a case where the length of the light guide 4 in the longitudinal direction is the longest. The holder 7 shown in FIG. 19 (the positional relationship is clearly shown in FIG. 18B) includes a first hollow portion, a first hollow portion, and a first hollow portion, the diameter of which decreases in order from the first opening side to the second opening side. There are two hollow portions and a third hollow portion, and the optical filter 6 is supported in the second hollow portion. Specifically, the optical filter 6 is formed in a step portion generated between the second hollow portion and the third hollow portion. Note that the thickness of the stepped portion is equal to or greater than the thickness of the optical filter 6. FIG. 19C shows that the second protrusion 5c and the fitting hole 5d of the light guide holder 5 are set to be arranged in the same cross section in the sub-scanning direction (short direction). . At least the inner wall shape of the first hollow portion is such that the portion of the light guide holder 5 inserted into the holder 7 is in contact with the holder 7 so that the light guide holder 5 can slide, or the light guide holder 5 The light guide holder 5 needs to be extendable without the portion inserted into the holder 7 coming into contact with the holder 7. The latter will be described later.

  As shown in FIG. 19B, when the expansion of the light guide 4 (the light guide holder 5) is maximized, the light guide is formed in the step portion generated in the first hollow portion and the second hollow portion. By arranging the light guide holder 5 and the holder 7 so that the end face 4a of the light guide 4 and the end face of the light guide holder 5 are in contact or just before contact, the end face 4a of the light guide 4 (light incident portion 4a) and the light emission part 3 (optical filter 6) can be prevented from contacting. This relationship is the same for the first protrusion 5b and the long hole 8b. In addition, as shown in FIGS. 19A and 19B, the light guide holder 5 has a pressing surface portion facing the edge of the first opening, and the pressing surface portion is slid on the light guide holder 5. You may make it restrict | limit a moving range (movement range) (FIG.19 (b)). In addition, when the expansion of the light guide 4 becomes maximum, the pressing surface portion may be immediately before contacting the edge of the first opening. In this case, the pressing surface portion is not the pressing surface portion but the facing surface portion.

  It can be said that the holder 7 holds the substrate 2, the light guide holder 5, and the optical filter 6, and suppresses unintended light from the light emitting unit 3. In the light source device according to Embodiment 1, an end including one end face of the light guide holder 5 is inserted into the first opening on one end face of the holder 7, and the second end face on the opposite end face of the holder 7 is inserted. The board | substrate 2 which fixed the light emission part 3 to opening is arrange | positioned so that the light emission part 3 and the light guide 4 may oppose. In addition, as described above, the distance between the end face 4a of the end portion of the light guide holder 5 inserted into the first opening and the optical filter 6 is determined by the expansion of the light guide 4 (light guide holder 5). Or, although it fluctuates due to shrinkage, it has a surface for holding the optical filter 6 and a surface for fixing the substrate 2 to the opposite surface (second opening), and keeps the distance between the optical filter 6 and the substrate 2 constant, The light guide 4 (light guide holder 5) is not affected by expansion / contraction (expansion or contraction). Therefore, the dimming characteristics of the optical filter 6 are stabilized.

  That is, in the light source device according to Embodiment 1, the fitting depth (insertion depth) of the light guide 4 and the holder 7 and the relative position of the light guide holder 5 and the holder 7 vary, but the plate-like member 8 The light guide holder 5 can be expanded and contracted in the longitudinal direction by providing a gap (gap) corresponding to the temperature characteristic expansion and contraction of the light guide holder 5 in the longitudinal direction. Therefore, the light guide 4 and the light guide holder 5 are not changed in the height direction and the short direction, that is, the illumination characteristics are not changed. Further, since the holder 7 is fixed in the longitudinal direction to the fastening portion 806 on the plate-like member 8 by the screw 10, the heat dissipation effect does not change. Furthermore, the distance between the plate-like member 8, the heat transfer body 9, the substrate 2, the light emitting element 1, the holder, and the optical filter 6 is constant at both normal temperature and high temperature. The distance is constant (when the expansion rate is close).

  That is, in the light source device according to Embodiment 1, the portion shielded by the light guide holder 5 is constant, and the effect of suppressing unnecessary stray light generated at the end of the light guide 4 is kept constant. On the other hand, since the relative distance between the light emitting unit 3 and the optical filter 6 is also kept constant, the function of converting light from the light emitting unit 3 is kept constant. With this structure, changes in illumination characteristics and heat dissipation characteristics due to expansion and contraction of the light guide 4 due to temperature changes do not occur.

  Although the light source device according to Embodiment 1 is not illustrated, the holder 7 can be placed inside the first opening or the first opening without bringing the end of the light guide holder 5 into contact with the holder 7. The end of the light guide holder 5 expands and contracts in the longitudinal direction, and the optical filter 6 is outside the range in which the end surface 4a of the light guide 4 moves due to the expansion and contraction of the end of the light guide holder 5. May be supported. In other words, in the light source device according to Embodiment 1, the holder 7 slidably holds the end of the light guide holder 5 in the first hollow portion, or the end of the light guide holder 5 is It can be said that it expands and contracts in the longitudinal direction within the first hollow portion. The same applies to the light source devices shown in FIGS.

  The light source device shown in FIGS. 20 and 21 has a holder 7 having a first hollow portion and a second hollow portion in which the diameter increases in order from the first opening side to the second opening side. The optical filter 6 is supported in the second hollow portion. Specifically, in FIG. 20, the optical filter 6 is formed in the stepped portion generated between the first hollow portion and the second hollow portion, or the stepped portion generated between the second hollow portion and the third hollow portion. ing. In FIG. 21, the optical filter 6 is formed in a step portion generated between the first hollow portion and the second hollow portion.

  The light source device shown in FIGS. 20 and 21 is similar to the light source device shown in FIGS. 18 and 19 when the expansion of the light guide 4 (light guide holder 5) is maximized. The light guide holder 5 and the holder 7 are arranged so that the end face 4a of the light guide 4 and the end face of the light guide holder 5 are in contact with or just before the step formed in the second hollow portion. However, the light guide holder 5 and the holder 7 may be arranged so that the end face 4a of the light guide 4 and the end face of the light guide holder 5 do not enter the second hollow portion at the time of maximum expansion. (FIG. 20). In the case of FIG. 21, the end surface 4 a of the light guide 4 and the end surface of the light guide holder 5 may enter the second hollow portion, but it is necessary not to contact the optical filter 6.

  The light source device according to Embodiment 1 and the reflector support structure according to Embodiment 1 described with reference to FIGS. 1 to 21 can be implemented by appropriately replacing each configuration. This replacement is applied to the light source device (reflector support structure) according to the second embodiment and the light source device (reflector support structure) according to the third embodiment and the light source device according to the first embodiment and the first embodiment. This also holds true with such a reflector support structure. Of course, this also holds between a light source device (reflector support structure) according to a second embodiment described later and a light source apparatus (reflector support structure) according to third embodiment described later.

  In the first embodiment, the holder 7 has been described with reference to the drawing in which the end portion of the light guide holder 5 is slidably held in the first hollow portion. However, the light guide holder 5 is a plate-like member. Since the holder 7 and the light guide holder 5 are not brought into contact with each other, the end of the light guide holder 5 is attached to the first of the holder 7. You may make it expand-contract in a longitudinal direction within a hollow part or on the 1st hollow part of the holder 7. FIG.

  Here, a specialized description will be given regarding the plate-like member 8 of the light source device according to the first embodiment. The plate-like member 8 (housing) has two elongated holes 8b formed at the center in the short direction of the bottom (bottom surface) having a rectangular shape, and a fitting hole formed between the two elongated holes 8b. 8c, a reflected light passage hole 807 (aperture) formed in the bottom surface along the longitudinal direction, a screw hole 805, a light guide holder fixing portion 802, a reflector support portion 801, a fastening portion 806, and a fastening portion 806 The light guide holder 5 and the reflector 11 are fixed in the longitudinal direction, the lateral direction, and the height direction, and the holder 7 and the heat transfer body 9 are fixed in the longitudinal direction, the lateral direction, and the height direction.

  The long hole 8b is located on the bottom surface of the plate-like member 8 and is located at one side end in the longitudinal direction and in the short direction, between the reflected light passage hole 807 and the fastening portion 806 and at the center in the short direction of the bottom surface of the light guide holder 5. It is a long hole in the direction, and the light guide holder 5 is fixed at the position in the short direction by inserting the first protrusion 5b of the light guide holder 5. The fitting hole 8c is on the bottom surface of the plate-like member 8, and is located between the reflected light passing hole 807 and the fastening portion 806 in the end opposite to the side having the long hole 8b in the longitudinal direction and in the short direction, and the bottom surface of the light guide holder 5 The light guide holder 5 is fixed at the position in the short side and the long side by inserting the second protrusion 5c of the light guide holder 5. Yes (Fig. 8).

  The reflected light passage hole 807 is a hole formed along the longitudinal direction of the bottom surface of the plate-like member 8, and the image information (scattered reflected light in the read target of the irradiated light) of the reading target is imaged on the imaging body (lens or the like). This is transmitted to a light receiving unit such as an optical system and an image sensor (FIG. 10), and functions to suppress other unnecessary light. The light guide holder fixing portion 802 extends to the side surface of the plate-like member 8 and is located on the opposite side of the reflection plate 11 with respect to the reflected light passage hole 807 and has a function of fixing the light guide holder 5 in the height direction. . A plurality of reflecting plate support portions 801 are provided in the longitudinal direction, are positioned outside the reflected light passage hole 807 in the short direction, and have a function of holding the reflecting plate 11 with high accuracy. The fastening portion 806 is located outside the longitudinal direction of the housing with respect to the reflected light passage hole 807, and fixes the substrate 2, the holder 7, and the heat transfer body 9 to the plate-like member 8 with the screw 10.

  The reflection plate support portion 801, the light guide holder fixing portion 802, the plate-like end portion 803, the plate-like end portion 804, the fastening portion 806, and the integral end portion 808 in the plate-like member 8 also function as a heat sink. In particular, the plate-like end portion 803, the plate-like end portion 804, the fastening portion 806, and the integral end portion 808 may be continuous at the side wall portion of the short side wall portion (fastening portion 806) of the plate-like member 8. Further, the short side wall portion (fastening portion 806) is extended and bent in the longitudinal direction, and the long side wall portion (plate-shaped end portion 803) extends in the longitudinal direction so as to face the direction opposite to the inclined surface portion 801. May be. Further, it may be continuous with the long side wall portion, bent in the end side direction, and extended (folded) in a direction facing the bottom surface of the plate-like member 8.

Embodiment 2. FIG.
A second embodiment of the present invention will be described with reference to FIGS. Embodiment 2 explains what the edge part of the light guide 4 bent. In particular, the end of the light guide 4 is bent toward the plate-like member 8 (plate-like member 8a), and the light-emitting portion 3 is directly or directly disposed on the plate-like member 8 (plate-like member 8a). And the light-emitting portion 3 attached through holes formed in the plate-like member 8 (plate-like member 8a) (light-emitting portion holes 809 and light-emitting portion notches described later). Will be explained. In the second embodiment, the description will focus on the parts different from the first embodiment. In consideration of expansion and contraction in the thickness direction of the light guide 4 and the light guide holder 5 of the light source device according to Embodiment 2, the light guide 4, the light guide holder 5, and the holder 7 are arranged. Needless to say. For example, the dimensions of the light guide holder 5 (light guide 4) and the holder 7 are set so that the light guide holder 5 (light guide 4) does not damage the holder 7 when the expansion is maximum. is assumed. However, since the influence is very small compared with the expansion and contraction of the light guide 4 and the light guide holder 5 in the longitudinal direction, the detailed description is omitted.

  23 (a) and 23 (b) are diagrams corresponding to a cross section around the light emitting unit of the light source device taken along the alternate long and short dash line EF in FIG. 5, and FIG. FIGS. 25 (a) and 25 (b) are diagrams corresponding to a cross section around the light emitting unit of the light source device taken along the dashed line EF in FIG. 5, and FIG. 25 (c) is a diagram of the light source device guided along the dashed line EF in FIG. FIGS. 27A and 27B are diagrams corresponding to a cross section near the center of the light body, FIGS. 27A and 27B are diagrams corresponding to a cross section around the light-emitting portion of the light source device along the alternate long and short dash line EF in FIGS. It is a figure equivalent to the light emission part periphery cross section of the light source device by the dashed-dotted line EF.

  30 (a) to 30 (d) are cross-sectional image views of only the holder 7 portion corresponding to a cross section of the periphery of the light emitting unit of the light source device taken along one-dot chain line EF of FIG. 5, and FIGS. 5 is a cross-sectional image view of only the holder 7 portion corresponding to the light-emitting portion peripheral cross-section of the light source device by a one-dot chain line EF. 32 (a) and 32 (b) are diagrams corresponding to a cross section around the light emitting unit of the light source device taken along the alternate long and short dash line EF of FIG. 5, and FIG. 33 (a) and 33 (b) are diagrams corresponding to a cross-section around the light emitting unit of the light source device taken along the alternate long and short dash line EF in FIG. 5, and FIG. It is a figure equivalent to a light body center vicinity cross section. FIGS. 23, 25, 27, 29, 32, and 33 show variations in the shape in which the light guide holder 5 is disposed on the first opening of the holder 7.

  34 (a) and 34 (b) are views corresponding to a cross section around the light emitting unit of the light source device taken along the alternate long and short dash line EF in FIG. 5, and FIG. FIGS. 35 (a) and 35 (b) are diagrams corresponding to a cross section around the light emitting unit of the light source device taken along the alternate long and short dash line EF in FIG. 5, and FIG. FIGS. 36 (a) and 36 (b) are diagrams corresponding to a cross section around the light emitting unit of the light source device along the dashed line EF in FIG. 5, and FIG. 36 (c) is a dashed line EF in FIG. FIG. 37A and FIG. 37B are diagrams corresponding to the cross section around the light emitting portion of the light source device taken along the alternate long and short dash line EF in FIG. 5, and FIG. 5 is a view corresponding to a cross section near the center of the light guide of the light source device taken along the five-dot chain line EF. 34 to 37 show variations of the shape in which the light guide holder 5 is inserted into the first opening of the holder 7.

  38 (a) and 38 (b) are diagrams corresponding to a cross-section around the light emitting unit of the light source device taken along the alternate long and short dash line EF in FIG. 5, and FIGS. FIGS. 40A and 40B are views corresponding to a cross section of the light emitting unit and a cross section of the light source unit taken along the alternate long and short dash line EF in FIG. 38, 39, and 40 show variations in the shape of the end face 4a of the light guide 4. FIG.

  22 to 40, 806 g is a fastening portion that is an area on the plate-like member 8 (plate-like member 8 a) to which the light-emitting portion 3 (substrate 2) is fastened directly or via the heat transfer body 9, It is the hole for light emission parts formed in the plate-shaped member 8 (plate-shaped member 8a). The light emitting unit 3 (substrate 2) is attached to the plate-like member 8 through the light emitting unit hole 809. The light emitting portion hole 809 does not have to be a complete hole surrounded by the plate member 8 around the light emitting portion hole 809, and is for the light emitting portion that is cut out inward from the outer shape of the plate member 8. A notch 809 may be used. In the present application, the light emitting portion hole 809 is described as including the light emitting portion notch 809. The illustration of the light emitting portion notch 809 is omitted. In the drawings, the same reference numerals denote the same or corresponding parts, and detailed descriptions thereof are omitted.

  FIG. 22 shows a plate-like member 8a that serves as a casing of the light source device according to the second embodiment. FIG. 22 shows an image when the light guide 4, the light guide holder 5, and the holder 7 are virtually placed on the plate-like member 8 after the plate-like member 8 a is bent. As shown in FIG. 23, in the light source device according to Embodiment 2, the end portion of the light guide 4 is bent toward the plate-like member 8 (plate-like member 8g), and the plate-like member 8g (plate-like member). 8) The light emitted from the light emitting portion 3 (light emitting element 1) formed (fastened) on the end surface 4a (light) of the light guide 4 whose end is bent toward the plate member 8 (plate member 8g) side Incident from the incident part 4a). Subsequent basic operations are the same as those of the light source device according to the first embodiment.

  Next, referring to FIG. 23, the light source device according to Embodiment 2 supports the optical filter 6 between the first opening and the second opening of the holder 7 while maintaining a predetermined distance from the light emitting unit 3. Furthermore, it will be described that the end face 4a (light incident portion 4a) of the light guide 4 and the light emitting portion 3 (optical filter 6) do not contact each other. FIG. 23A shows a case where the length of the light guide 4 in the longitudinal direction is the shortest. FIG. 23B shows a case where the length of the light guide 4 in the longitudinal direction is the longest. The holder 7 shown in FIG. 23 has a first hollow portion and a second hollow portion in which the diameter decreases in order from the first opening side to the second opening side, and the optical filter 6 is provided in the first hollow portion. Support. Specifically, the optical filter 6 is formed in a step portion generated between the first hollow portion and the second hollow portion. Note that the thickness of the stepped portion is equal to or greater than the thickness of the optical filter 6. FIG. 23C shows that the second protrusion 5c and the fitting hole 5d of the light guide holder 5 are set so as to be arranged in the same cross section in the sub-scanning direction (short direction). .

  As shown in FIG. 23B, when the expansion of the light guide 4 (light guide holder 5) is maximized, the end face 4a of the light guide 4 and the light guide holder 5 are formed in the first opening. By arranging the light guide holder 5 and the holder 7 so that the end faces come into contact or just before contact, the end face 4a (light incident part 4a) and the light emitting part 3 (optical filter 6) of the light guide 4 are arranged. Can be kept out of contact. As shown in FIGS. 23 (a) and 23 (b), the light guide holder 5 has a pressing surface portion facing the edge of the first opening and the holder 7, respectively. You may make it restrict | limit the sliding range (movement range) of the body holder 5 (FIG.23 (b)). In addition, when the expansion of the light guide 4 becomes maximum, the pressing surface portion may be immediately before contacting the edge of the first opening. In this case, the pressing surface portion is not the pressing surface portion but the facing surface portion.

  FIG. 24 shows a plate-like member 8a that serves as a casing of the light source device according to the second embodiment. 24 is formed with a light emitting portion hole 809 (light emitting portion notch 809). As shown in FIG. 25, in the light source device according to Embodiment 2, the end portion of the light guide 4 is bent toward the plate-like member 8 (light emitting portion hole 809), and the light emitting portion hole 809 (plate) The light emitted from the light emitting part 3 (light emitting element 1) via the shaped member 8) has an end face 4a (light incident part) of the light guide 4 whose end is bent toward the plate shaped member 8 (light emitting part hole 809) side. 4a). Subsequent basic operations are the same as those of the light source device according to the first embodiment. The main part of the bending of the light guide 4 exists on the XZ plane in the second embodiment. Also in the light guide 4 of the light source device according to Embodiment 2, the light scattering pattern 4c only needs to be formed at least in a portion corresponding to the effective reading region in the main scanning direction of the image reading device. Further, by adjusting the light intensity at the end of the effective reading area (in the vicinity of the holder 7) by emitting more or less light from the bent portion of the light guide 4 than other portions. Also good.

  The light source device according to Embodiment 2 in FIGS. 24 and 25 supports the optical filter 6 between the first opening and the second opening of the holder 7 while maintaining a predetermined distance from the light emitting unit 3. Furthermore, the end surface 4a (light incident part 4a) of the light guide 4 and the light emitting part 3 (optical filter 6) do not come into contact with each other. Since this description is basically the same as that described with reference to FIG. 23, detailed description thereof is omitted. FIGS. 25A, 25B, and 25C correspond to FIGS. 23A, 23B, and 23C, respectively. 23 is different from FIG. 23 in that the light emitting portion 3 is formed on the plate-like member 8g. In FIG. 25, the light emitting portion 3 (light emitting element 1) is inserted into the light emitting portion hole 809. ing. In order to facilitate the comparison between FIG. 25 and FIG. 23, the heat transfer body 9 is illustrated so as not to be in contact with the plate-like member 8 (light emitting part hole 809) that is a housing. The heat transfer body 9 and the plate-like member 8 may be brought into direct or indirect contact to conduct heat, or the heat transfer body 9 may not be provided.

  FIG. 26 shows a plate-like member 8a that serves as a casing of the light source device according to the second embodiment. FIG. 26 shows an image when the light guide 4, the light guide holder 5, and the holder 7 are virtually placed on the plate-like member 8 after the plate-like member 8 a is bent. As shown in FIG. 27, in the light source device according to Embodiment 2, the end portion of the light guide 4 is bent toward the plate-like member 8 (plate-like member 8g or light emitting portion hole 809). 26 and 27 correspond to FIGS. 22, 23, 24, and 25, respectively, and the bent portion of the light guide 4 on the side opposite to the holder 7 is also covered with the light guide holder 5. Shows the case. FIG. 27A shows a case where the plate-like member 8 has a region of the plate-like member 8g (corresponding to FIGS. 22 and 23). FIG. 27B shows a case where the plate-like member 8 has a light emitting portion hole 809 (corresponding to FIGS. 22 and 23).

  FIG. 28 shows a plate-like member 8a that serves as a casing of the light source device according to the second embodiment. FIG. 28 shows an image when the light guide 4, the light guide holder 5, and the holder 7 are virtually placed on the plate-like member 8 after the plate-like member 8 a is bent. As shown in FIG. 29, in the light source device according to Embodiment 2, the end portion of the light guide 4 is bent toward the plate-like member 8 (plate-like member 8g or light emitting portion hole 809). FIG. 28 and FIG. 29 correspond to FIG. 26 and FIG. 27, the bent portion of the light guide 4 on the side opposite to the holder 7 is also covered with the light guide holder 5, and the light guide of that portion is also provided. The case where the body holder 5 is covered with the holder 7 and is in close contact or slidable is shown. In other words, the end of the light guide holder 5 (light guide 4) is inserted into the first hollow portion of the holder 7, and the light guide holder 5 (light guide 4) is slidable (expandable) to the holder 7. It can be said that it shows the case where it touches. FIG. 29A shows a case where the plate-like member 8 has a region of the plate-like member 8g (corresponding to FIG. 27A). FIG. 29B shows a case where the plate-like member 8 has a light emitting portion hole 809 (corresponding to FIG. 27B).

  The holder 7 described in FIGS. 22 to 29 and its modification will be described with reference to FIGS. 30 and 31. 30 (a) and 30 (b) show the holder 7 described in FIGS. The holder 7 shown in FIG. 30 (a) has a first hollow portion, a second hollow portion, and a third hollow portion, the diameter of which decreases in order from the first opening side to the second opening side, The optical filter 6 is supported in the second hollow portion. Specifically, the optical filter 6 is formed in a step portion generated between the second hollow portion and the third hollow portion. In addition, the 1st hollow part and the 2nd hollow part are arrange | positioned in the position where the central axis of each diameter cross | intersects. The thickness of the step portion is equal to or greater than the thickness of the optical filter 6.

  The holder 7 shown in FIG. 30 (b) has a first hollow portion and a second hollow portion, the diameters of which decrease in order from the first opening side to the second opening side. The optical filter 6 is supported. Specifically, the optical filter 6 is formed in a step portion generated between the first hollow portion and the second hollow portion. Note that the thickness of the stepped portion is equal to or greater than the thickness of the optical filter 6.

  The holders 7 shown in FIGS. 30 (c) and 30 (d) are modifications of the holder 7 shown in FIGS. 30 (a) and 30 (b). The holder 7 shown in FIG. 30 (c) has a first hollow portion, a second hollow portion, a third hollow portion, and a fourth hollow in the inside thereof, the diameter of which decreases in order from the first opening side toward the second opening side. The optical filter 6 is supported in the second hollow portion or the third hollow portion. Specifically, the optical filter 6 is formed in a stepped portion generated between the second hollow portion and the third hollow portion or a stepped portion generated between the third hollow portion and the fourth hollow portion. In addition, the 1st hollow part and the 2nd hollow part are arrange | positioned in the position where the central axis of each diameter cross | intersects. The thickness of the step portion is equal to or greater than the thickness of the optical filter 6.

  The holder 7 shown in FIG. 30 (d) has a first hollow portion, a second hollow portion, and a third hollow portion, the diameter of which decreases in order from the first opening side to the second opening side, The optical filter 6 is supported in the first hollow portion or the second hollow portion. Specifically, the optical filter 6 is formed in a stepped portion generated between the first hollow portion and the second hollow portion or a stepped portion generated between the second hollow portion and the third hollow portion. Note that at least the thickness of the step formed between the first hollow portion and the second hollow portion is equal to or greater than the thickness of the optical filter 6. The inner wall shape of the first hollow portion shown in FIGS. 30A and 30C is such that the portion of the light guide holder 5 inserted into the holder 7 comes into contact with the holder 7 so that the light guide holder 5 can slide. Alternatively, the light guide holder 5 needs to have a shape that allows the light guide holder 5 to be expanded and contracted without the portion inserted into the holder 7 of the light guide holder 5 being in contact with the holder 7.

  The holders 7 shown in FIGS. 31 (a), 31 (b), 31 (c) and 31 (d) are modifications of the holder 7 shown in FIGS. 30 (a) and 30 (b), respectively. The holder 7 shown in FIG. 31 (a) has a first hollow portion, a second hollow portion, and a third hollow portion, the diameters of which increase in order from the first opening side toward the second opening side, The optical filter 6 is supported in the third hollow portion. Specifically, in FIG. 31A, the optical filter 6 is formed at a step portion generated between the second hollow portion and the third hollow portion. In addition, the 1st hollow part and the 2nd hollow part are arrange | positioned in the position where the central axis of each diameter cross | intersects. The inner wall shape of the first hollow portion shown in FIGS. 31 (a) and 31 (c) is such that the portion of the light guide holder 5 inserted into the holder 7 comes into contact with the holder 7 so that the light guide holder 5 can slide. Alternatively, the light guide holder 5 needs to have a shape that allows the light guide holder 5 to be expanded and contracted without the portion inserted into the holder 7 of the light guide holder 5 being in contact with the holder 7.

  The holder 7 shown in FIG. 31 (b) has a first hollow portion and a second hollow portion, the diameters of which increase in order from the first opening side toward the second opening side, and the inside of the second hollow portion. The optical filter 6 is supported. Specifically, in FIG. 31A, the optical filter 6 is formed at a step portion generated between the first hollow portion and the second hollow portion.

  The holder 7 shown in FIG. 31 (c) has a first hollow portion, a second hollow portion, and a third hollow portion, the diameters of which increase in order from the first opening side toward the second opening side, A fourth hollow portion having a smaller diameter than the third hollow portion communicates with the third hollow portion. The optical filter 6 is supported in the third hollow portion. Specifically, in FIG. 31 (c), the optical filter 6 is formed in the stepped portion generated between the second hollow portion and the third hollow portion or the stepped portion generated between the third hollow portion and the fourth hollow portion. Has been. In addition, the 1st hollow part and the 2nd hollow part are arrange | positioned in the position where the central axis of each diameter cross | intersects.

  The holder 7 shown in FIG. 31 (d) has a first hollow portion and a second hollow portion whose diameters increase in order from the first opening side to the second opening side. The third hollow portion having a small diameter communicates with the second hollow portion. The optical filter 6 is supported in the second hollow portion. Specifically, in FIG. 31 (d), the optical filter 6 is formed in the stepped portion generated between the first hollow portion and the second hollow portion or the stepped portion generated between the second hollow portion and the third hollow portion. Has been. In addition, hollow parts other than the first hollow part shown in FIGS. 30 (a) (c) and 31 (a) (c) (first hollow part, second hollow part, third hollow part, fourth hollow part) As long as the inner wall shape is a cylindrical shape, there is no particular limitation as long as the light from the light emitting portion 2 is not blocked.

  The case where it exposes from the bending part of the light guide 4 in the opposite side to the holder 7 to the end surface 4a (light incident part 4a) of the light guide 4 is demonstrated using FIG.32 and FIG.33. FIGS. 32 (a), (b), and (c) correspond to FIGS. 23 (a), (b), and (c), respectively, and FIGS. 33 (a), (b), and (c) respectively correspond to FIGS. (B) Since it corresponds to (c), detailed description of the common part is omitted. 32 and 33 are exposed from the bent portion of the light guide 4 on the side opposite to the holder 7 to the end surface 4a (light incident portion 4a) of the light guide 4, so that FIG. ) And FIG. 33 (b), when the expansion of the light guide 4 is maximum, the side surface of the light guide 4 approaches or comes into contact with the holder 7. It is good also as an opposing surface part or a pressing surface part.

  34 and 35, the bent portion of the light guide 4 on the holder 7 side to the end surface 4a (light incident portion 4a) of the light guide 4 are also covered with the light guide holder 5 and inserted into the first hollow portion. The case will be described. FIGS. 34 (a), (b), and (c) correspond to FIGS. 23 (a), (b), and (c), respectively, and FIGS. 35 (a), (b), and (c) respectively correspond to FIGS. (B) Since it corresponds to (c), detailed description of the common part is omitted. In the light source device described in FIGS. 34 and 35, the light guide holder 5 thinner than that shown in FIGS. 23 and 25 is provided with the light guide 4 along the holder 7 side of the bent portion of the light guide 4. Since it covers, the holder 7 having the same shape as that of the first embodiment can be used.

  36 and 37, the light guide 4 is exposed from the bent portion of the light guide 4 on the side opposite to the holder 7 to the end surface 4a (light incident portion 4a) of the light guide 4, and the light guide 4 is bent on the holder 7 side. The case where the portion to the end face 4a (light incident portion 4a) of the light guide 4 is also covered with the light guide holder 5 and inserted into the first hollow portion will be described. FIGS. 36 (a), (b), and (c) correspond to FIGS. 23 (a), (b), and (c), respectively, and FIGS. 37 (a), (b), and (c) respectively correspond to FIGS. (B) Since it corresponds to (c), detailed description of the common part is omitted. 36 is a combination of the light source device shown in FIG. 32 and the light source device shown in FIG. 34. The light source device shown in FIG. 37 is the same as the light source device shown in FIG. This is a combination with the light source device shown in FIG.

  Therefore, in the light source device described in FIGS. 36 and 37, when the expansion of the light guide 4 is maximum, the side surface of the light guide 4 approaches or contacts the holder 7. This portion may be an opposing surface portion or a pressing surface portion. Further, since the light guide holder 5 thinner than the one shown in FIGS. 23 and 25 covers the light guide 4 along the holder 7 side of the bent portion of the light guide 4, The thing of the same shape as what concerns on the form 1 can be used.

  Variations of the shape of the light guide 4 of the light source device according to Embodiment 2 will be described with reference to FIGS. 38, 39, and 40. Other than the shape of the light guide 4 in FIGS. 38 (a) (b), 39 (a) (b), 40 (a) (b), those shown in FIGS. 29 (a) (b), respectively. And will be described using a common structure. Detailed description of common parts is omitted.

  In the light guide 4 shown in FIGS. 38A and 38B, the position where the end face 4a (light incident portion 4a) extends is substantially the same as the position of the bottom of the portion extending in the longitudinal direction of the light guide 4. Is set. By using such a light guide 4 in the light source device according to Embodiment 2, the light guide 4 and the light guide holder 5 can be reduced in height in the thickness direction (height direction). Further, the shapes of the light guide holder 5 and the holder 7 can be simplified.

  In the light guide 4 shown in FIGS. 39A and 39B, the position where the end face 4 a (light incident portion 4 a) surface extends is higher than the position of the bottom surface of the portion extending in the longitudinal direction of the light guide 4. Is set. By using such a light guide 4 in the light source device according to Embodiment 2, the light guide 4 is more guided in the thickness direction (height direction) than the light guide 4 shown in FIGS. The height of the light body 4 and the light guide holder 5 can be reduced. Further, the shapes of the light guide holder 5 and the holder 7 can be further simplified.

  In the light guide 4 shown in FIGS. 39A and 39B, a part of the end face 4 a (light incident portion 4 a) surface protrudes, and the protrusion is in contact with the light guide holder 5. Therefore, the light guide 4 and the light guide holder 5 are reduced in height in the thickness direction (height direction), and the fitting between the light guide 4 and the light guide holder 5 is made stronger. Can do.

  The light source device according to the second embodiment described with reference to FIGS. 22 to 40 can be implemented by appropriately replacing each configuration. This replacement is also established between the light source device (reflector support structure) according to Embodiment 3 described later and the light source apparatus (reflector support structure) according to Embodiment 1 described above.

Embodiment 3 FIG.
A third embodiment of the present invention will be described with reference to FIGS. Embodiment 3 explains what the edge part of the light guide 4 bent. In particular, the end portion of the light guide 4 is bent toward the plate-like member 8 (plate-like member 8a), and the light-emitting portion 3 is bent in a direction intersecting the longitudinal direction of the plate-like member 8 (plate-like member 8a). The light emitting part 3 is bent in a direction intersecting with the longitudinal direction of the plate-like member 8 (plate-like member 8a) and the part fastened to the portion (a fastening portion 806s described later) directly or via the heat transfer body 9. The part attached to the part through the formed light emitting part hole or light emitting part notch will be described. In the third embodiment, the description will focus on the parts different from the first and second embodiments. In consideration of expansion and contraction in the thickness direction of the light guide 4 and the light guide holder 5 of the light source device according to Embodiment 3, the light guide 4, the light guide holder 5, and the holder 7 are arranged. Needless to say. For example, the dimensions of the light guide holder 5 (light guide 4) and the holder 7 are set so that the light guide holder 5 (light guide 4) does not damage the holder 7 when the expansion is maximum. is assumed. However, since the influence is very small compared with the expansion and contraction of the light guide 4 and the light guide holder 5 in the longitudinal direction, the detailed description is omitted.

  41 and 47 show a plate-like member 8a serving as a housing of the light source device according to Embodiment 3. FIG. 41 and 47 show an image when the light guide 4, the light guide holder 5, and the holder 7 are virtually placed on the plate-like member 8 after the plate-like member 8 a is bent. . 41 and 47 show a state in which the inside of the holder 7 is seen through, and a part of the light guide 4, the optical filter 6, and the light emitting element 1 are indicated by dotted lines. 42 (a) is a cross-sectional view taken along a plane parallel to the surface on which the plate-like member 8a shown in FIG. 41 extends, and FIG. 42 (b) is a plan view of the light guide 4 and the guide from FIG. 42 (a). FIG. 43 is a side view of the light source device seen from the dotted arrow A shown in FIG. 41, and FIG. 44 (a) is an extension of the plate-like member 8a shown in FIG. 44B is a virtual sectional view in which the light guide 4 and the light guide holder 5 are excluded from FIG. 44A. 45 (a) is a cross-sectional view taken along a plane parallel to the surface on which the plate-like member 8a shown in FIG. 41 extends, and FIG. 45 (b) is a guide from the light guide 4 to FIG. 45 (a). FIG. 46 is a side view of the light source device viewed from the dotted arrow A shown in FIG.

  40 to 47, 806 s is a region at the plate-like end 804 (light guide holder 5 side), has a screw hole through which the screw 10 is passed, is formed in the plate-like member 8, and the light guide holder 5 , The light emitting part 3, the fastening part to which the heat transfer body 9 is fastened by the screw 10, and 809 s are light emitting part holes formed in the plate-like end part 804 (plate-like member 8 a). The light emitting unit 3 (substrate 2) is attached to the plate-like member 8 (plate-like end portion 804) through the light emitting unit hole 809s. In the drawings, the same reference numerals denote the same or corresponding parts, and detailed descriptions thereof are omitted.

  The light emitting portion hole 809s does not need to be a complete hole surrounded by the plate end portion 804 (plate member 8), and the light emitting portion hole 809s does not need to be a complete hole. ) Of the light emitting part cut out inward from the outer shape of). In the present application, description will be made assuming that the light-emitting portion notch 809s includes the light-emitting portion hole 809s. The illustration of the light emitting portion hole 809s is omitted. The light emitting part notch 809s (light emitting part hole 809s) indicates that “the plate-like member 8 has one end along the main scanning direction (longitudinal direction) other than the light guide holder fixing part 802. Of the plurality of plate-like end portions 804 continuous with the plate-like member 8, two plate-like end portions 804 at positions where the light guide holder fixing portion 802 is sandwiched are formed. In the drawings, the same reference numerals denote the same or corresponding parts, and detailed descriptions thereof are omitted.

  The difference between FIGS. 42 and 43 and FIGS. 45 and 46 is particularly clear from FIGS. 42 (b) and 45 (b). As shown in FIGS. 42 and 43, the light source device shown in FIGS. There is no holder 7 between the holder 5 and the plate-like member 8, and the light source device shown in FIGS. 45 and 46 has the holder 7 between the light guide holder 5 and the plate-like member 8. It is. Specifically, the holder 7 shown in FIGS. 42 and 43 has a holder 7 (of the first hollow portion) in the thickness direction of the light source device according to Embodiment 3 on the first hollow portion (formed by the optical filter 6). Wall surface extending from the edge), light guide holder 5 and plate member 8 are arranged in this order. On the other hand, the holder 7 shown in FIGS. 45 and 46 has the holder 7 (the edge of the first hollow portion) in the thickness direction of the light source device according to Embodiment 3 on the first hollow portion (formed by the optical filter 6). Wall surface extending from), light guide holder 5, holder 7 (wall surface extending from the edge of the first hollow portion), and plate-like member 8 are arranged in this order. That is, the holder 7 shown in FIGS. 45 and 46 is the holder 7 shown in FIG. 30B in the second embodiment. However, the arrangement of the holder 7 is as shown in parentheses in FIG. Therefore, the holder 7 shown in FIGS. 30 and 31 also has the same configuration as the holder 7 shown in FIGS. 42 and 43, and the holder 7 (wall surface extending from the edge of the first hollow portion) in the thickness direction of the light source device. ), The light guide holder 5 and the plate-like member 8 may be arranged in this order. 44 (a) and 44 (b) are cross-sectional views showing a structure common to both.

  In the light source device according to Embodiment 3, the light guide holder 5 of the light source device described in FIGS. 42A and 43 (the same applies to FIGS. 45A and 46) is the first opening of the holder 7. A pressing surface portion facing the edge is provided. Specifically, the pressing surface portion corresponds to a portion of the light guide holder 5 that covers the outer peripheral side of the bent portion of the light guide 4. The pressing surface portion may limit the sliding range (movement range) of the light guide holder 5. In addition, when the expansion of the light guide 4 becomes maximum, the pressing surface portion may be immediately before contacting the edge of the first opening. In this case, the pressing surface portion is not the pressing surface portion but the facing surface portion.

  42 and 43, the end of the light guide holder 5 is slidably held by the holder 7 (the end of the light guide holder 5), or the end 5 of the light guide holder is The first hollow portion expands and contracts in the longitudinal direction. Similarly, the end of the light guide holder 5 shown in FIGS. 45 and 46 is slidably held by the holder 7 (the end of the light guide holder 5) or the end of the light guide holder. 5 expands and contracts in the longitudinal direction on the first hollow portion. However, the light guide holder 5 shown in FIGS. 42 and 43 and the light guide holder 5 shown in FIGS. Specifically, a part of the end of the light guide holder 5 described in FIGS. 42 and 43 slides in contact with the plate member 8 or expands or contracts in the longitudinal direction on the plate member 8. Become.

  In the light source device according to Embodiment 3, the end of the light guide 4 is bent toward the plate-like end 804 (fastening portion 809s), and the light emitting portion 3 (light emitting element 1) fastened to the fastening portion 809s. The light emitted from the light enters from the end face 4a (light incident portion 4a) of the light guide 4 whose end is bent toward the plate-like end 804 (fastening portion 809s). Subsequent basic operations are the same as those of the light source device according to the first and second embodiments. The main part of the bending of the light guide 4 exists on the XZ plane in the second embodiment, but exists on the XY plane in the third embodiment. Also in the light guide 4 of the light source device according to Embodiment 3, the light scattering pattern 4c only needs to be formed at least in a portion corresponding to the effective reading region in the main scanning direction of the image reading device. Further, by adjusting the light intensity at the end of the effective reading area (in the vicinity of the holder 7) by emitting more or less light from the bent portion of the light guide 4 than other portions. Also good.

  The light source device shown in FIG. 47 is different from the light source device shown in FIGS. 41 to 46 in that the light emitting unit 3 (substrate 2) is fastened to the fastening portion 806s with a screw 10 (not shown). 3 (substrate 2) is attached to the plate-like member 8 through the light emitting portion notch 809s. As described above, the light emitting portion notch 809s may be the light emitting portion hole 809s completely surrounded by the plate-like end portion 804.

  In addition to FIG. 47, the plate-like member 8a (plate-like member 8) of the light source device according to Embodiment 3 in FIG. To the outside of the screw hole 805) and bent to form an L-shaped or U-shaped heat radiating plate extending in the short direction or in the long and short directions. (The illustration is omitted). In the case of bending in the longitudinal direction and the short direction, there are a case where it is made parallel to the plate-like end portion 804 and a case where it is made parallel to the plate-like end portion 803. In the case of being parallel to the plate-like end portion 803, a heat radiating plate extending in the longitudinal direction is formed facing the slope portion 801 (reflecting plate support portion 801) on the side opposite to the long side wall portion. (Although not shown, a heat radiating plate is formed on the surface opposite to the reflecting surface of the reflecting plate 11). Of course, the heat radiating plate may be formed to extend to the bottom surface side of the plate-like member 8. Similarly, the plate-like member 8a (plate-like member 8) of the light source device according to Embodiment 3 in FIGS. 41 and 47 is the extended light guide holder fixing portion 802e and the extended plate-like end portion shown in FIGS. You may form 804e as a heat sink. The same applies to the plate-like member 8 in the light source device according to Embodiment 2 with respect to the heat sink.

  The light source device according to Embodiment 3 supports the optical filter 6 between the first opening and the second opening of the holder 7 while maintaining a predetermined distance from the light emitting unit 3. Furthermore, the end surface 4a (light incident part 4a) of the light guide 4 and the light emitting part 3 (optical filter 6) do not come into contact with each other. In order to facilitate the comparison between FIG. 41 and FIG. 47, in FIG. 47, the heat transfer body 9 is in contact with the plate-shaped end portion 804 (notch 809s for the light emitting portion) that is the casing and only a part of the side surface. However, in actuality, the heat transfer body 9 may be made to conduct heat by directly or indirectly contacting a portion other than the side surface of the heat transfer body 9 and the plate-like end portion 804, or the heat transfer body 9. May not be provided.

  The fastening portion 806s and the light emitting portion notch 809s (light emitting portion hole 809s) in the light source device according to Embodiment 3 are not limited to the plate-shaped end portion 804 (light guide holder 5 side), but the plate-shaped end portion 803 ( You may form in the reflecting plate 11 side. In this case, the bending direction of the light guide 4 is opposite (in FIG. 41 and FIG. 47, the upper and lower sides in the bending direction are opposite). In addition to the plate-like end portion 803 and the plate-like end portion 804, a fastening portion 806s and a light-emitting portion notch 809s (light-emitting portion hole 809s) may be formed. For example, in the same manner as the fastening portion 806 formed in the portion bent in the longitudinal direction of the plate member 8 (plate member 8a), the portion bent in the short direction of the plate member 8 (plate member 8a). The fastening portion 806s and the light emitting portion notch 809s (light emitting portion hole 809s) may be formed.

1 .... light emitting element 2 .... substrate (LED substrate) 3 .... light emitting part 4 .... light guide 4a ... light incident part (end face of light guide 4) 4b ... light emitting part ( Side surface of the light guide 4), 4c... Light scattering pattern, 4d .. Projection part 5,. Light guide holder, 5a ... Light guide locking part, 5b ... First projection part, 5c ... 2nd projection, 5d .. fitting hole (for light guide 4), 6 ... optical filter, 7 holder 7 ... plate member, 8a ... plate member (before bending), 8b ... Long hole (for light guide holder 5), 8c ·· Fitting hole (for light guide holder 5), 8s · · Plate-like member (before bending), 801 · · Reflector support (folded in two places, slope Part), 801e..extended reflector support part, 801b..reflector support part (one-folded, inclined part), 802..light guide holder fixing part, 802e..extension guide Body holder fixing portion, 803... Plate-like end (reflecting plate 11 side), 803e .. extension plate-like end (reflecting plate 11 side), 804... Plate-like end (light guide holder 5 side), 804e ... Extension plate-like end (light guide holder 5 side), 805 ... Screw hole, 806 ... Fastening part, 806g ... Fastening part, 806s ... Fastening part, 807 ... Reflected light passage hole (rod) Lens holding part), 808 ..Integral end part, 809 ..Light emitting part hole (light emitting part notch), 809 s ..Light emitting part notch (light emitting part hole), 9.・ ・ Screw, 11 ・ ・ Reflector (mirror).

Claims (20)

  A light source device for use in an image reading device, which is arranged in a main scanning direction, a rod-shaped light source or an array light source, and is disposed to face the rod-shaped light source or the array light source, extends in the main scanning direction, and is in the rod shape A light source device comprising: a reflection plate that reflects light emitted from a side surface of a light source or an array light source; and a plurality of reflection plate support portions that are intermittently arranged along the main scanning direction and support the reflection plate.   A light source device for use in an image reading device, which is arranged in a main scanning direction, a rod-shaped light source or an array light source, and is disposed to face the rod-shaped light source or the array light source, extends in the main scanning direction, and is in the rod shape A reflection plate that reflects light emitted from the side surface of the light source or the array light source, and a plurality of reflection plate support portions that are arranged at predetermined intervals along the main scanning direction and support the reflection plate. Light source device.   3. The light source according to claim 1, wherein the plurality of reflection plate support portions are arranged on a surface side opposite to a surface that reflects light emitted from a side surface of the rod-shaped light source or the array light source in the reflection plate. apparatus.   The plurality of reflecting mirror support portions are erected with an angle with respect to the sub-scanning direction with respect to the main scanning direction with respect to the plate-like member that supports the plurality of reflecting mirror support portions. The light source device according to claim 1.   The light source device according to claim 4, wherein the plurality of reflecting mirror support portions are integrated with the plate-like member.   6. The light source device according to claim 5, wherein each of the plurality of reflecting mirror support portions is formed by bending one end of the plate-shaped member along the main scanning direction.   The plate-like member has a plurality of plate-like end portions, each of which is continuous with the plate-like member, except for the plurality of reflecting mirror support portions, at one end along the main scanning direction. Light source device.   The light source device according to claim 7, wherein the plate-like end portion has a length in the main scanning direction that is longer than a length of the reflecting mirror support portion in the main scanning direction.   9. The light source device according to claim 7, wherein the plurality of plate-like end portions have connection interface means with a carriage of the image reading device.   9. The plurality of plate-like end portions are integrally formed by connecting the base end side continuous with the plurality of reflecting mirror support portions from the distal end side along the sub-scanning direction, respectively. , 9. The light source device according to claim 9.   The light source device according to claim 6, wherein the plate-like member holds the rod-like light source or the array light source at the other end of the plate-like member.   The plurality of reflecting plate support portions have a portion bent with respect to the sub-scanning direction in addition to a base end portion having an angle with respect to the plate-like member. A light source device according to claim 1.   3. The light source device according to claim 1, wherein the plurality of reflecting plate support portions have a portion bent with respect to the sub-scanning direction with respect to the main scanning direction.   A reflector support structure used in an image reading apparatus, the reflector extending in the main scanning direction, and a plurality of reflector support parts that are intermittently arranged along the main scanning direction and support the reflector And a reflector support structure.   A reflecting plate support structure used in an image reading apparatus, and a plurality of reflecting plates that extend in the main scanning direction and are arranged at predetermined intervals along the main scanning direction and support the reflecting plate The reflector support structure provided with the reflector support part. The plurality of reflection plate support portions are disposed on a surface side opposite to the reflection surface of the reflection plate,
It is integral with the plate-like member that supports the plurality of reflector support parts,
With respect to the plate-like member, it stands up with an angle with respect to the sub-scanning direction with respect to the main scanning direction,
The reflector support structure according to claim 14 or 15, wherein each of the plate-like members is formed by bending one end along the main scanning direction.   17. The reflection according to claim 16, wherein the plurality of reflecting plate support portions have a portion bent with respect to the sub-scanning direction in addition to a base end portion having an angle with respect to the plate-like member. Board support structure.   The reflecting plate support structure according to claim 14 or 15, wherein the plurality of reflecting plate support portions have a portion bent with respect to the sub-scanning direction with respect to the main scanning direction. The rod-shaped light source is a discharge lamp,
The light source device according to claim 1, wherein the array light source has a plurality of light emitting units arranged in the main scanning direction and emits light in the sub scanning direction. The rod-shaped light source is composed of a light emitting portion and a columnar light guide that guides light from the light emitting portion incident from the end face in the longitudinal direction and emits the light from the side surface.
The light source according to any one of claims 1 to 13, wherein the array light source has a plurality of light emitting units arranged in the main scanning direction, and emits light in the sub scanning direction by a light guide member or a reflecting member. apparatus.

Images