JP2016157089A - Document reader - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a document reader that can be constituted inexpensively and compactly without causing any hindrance to traveling of a carriage or reading of a document.SOLUTION: A document reader 1 comprises a carriage 10, a wiring board 14, a light source 4, a connector 15, a power supply part 9, and a flexible wiring member 30. The carriage 10 is provided to extend along a Y axis and move along an X axis. The wiring board 14 assembled in the carriage 10 has a mounting surface parallel with the X axis and orthogonal to the Y axis. The wiring board 14 is provided with the light source 4 and the connector 15 connected electrically thereto. The flexible wiring member 30 which is thin in thickness-directional size and in a long beltlike shape has a relaxation part 33 which connects the power supply part 9 and connector 15 together and is folded back along the X axis. A folded-back part is formed at one end 31 of the flexible wiring member 30, and the thickness direction of the part corresponding to the relaxation part 33 is therefore always substantially orthogonal to the Y direction.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a document reading apparatus that reads a document by receiving reflected light of light irradiated on the document and performing photoelectric conversion, and more particularly to a document reading apparatus including a carriage on which a light source is mounted.

  2. Description of the Related Art Conventionally, a document reading device (image scanner) has been widely used as a device used for digitizing or copying a document, a figure, a photograph, or the like. In general, document reading apparatuses are classified into those using a contact-type equal-magnification optical system and those using a reduction optical system. Among these, in a document reading apparatus using a reduction optical system, a so-called mirror scanning method and One of the unit scanning methods is employed.

  Both the mirror scan method and the unit scan method are common in that they have a carriage that can travel along a predetermined direction. However, in the mirror scan method, two carriages are used, and in the unit scan method, 1 is used. Only one carriage is used.

  That is, when reading a document, a light source, a reflector that reflects light from the light source toward the document, a plurality of reflecting mirrors that reflect the reflected light from the document multiple times, and light reflected from the document are received and photoelectrically received. An optical system such as an image sensor for conversion and an imaging lens system that forms an image of reflected light from the original on the image sensor is required. A unit scan system is a system in which these various optical systems are all mounted on one carriage. The mirror scan method is a system in which a part of the plurality of reflecting mirrors is mounted on another carriage.

  In a document reading apparatus equipped with this type of travelable carriage, a power supply unit (power circuit, etc.) that supplies power to a light source mounted on the carriage is installed in the main body of the document reading apparatus outside the carriage. Often done. In this case, the electrical connection between the light source and the power supply unit is facilitated by the internal scanning of the document reading device, such as a flexible flat cable (FFC) or a flexible printed circuit (FPC). The flexible wiring member is used.

  Here, for example, Japanese Patent Laid-Open No. 2003-87518 (Patent Document 1) discloses a document reading apparatus that specifically uses an FFC for connecting a light source and a power supply unit. For example, Japanese Patent Application Laid-Open No. 2007-179014 (Patent Document 2) is a document that specifically discloses an original reading apparatus that uses an FPC for connection to a section.

JP 2003-87518 A JP 2007-179014 A

  In recent years, document reading apparatuses using LEDs (Light-Emitting Diodes) as the above-described light sources are becoming widespread. When using an LED as a light source, an array system in which a plurality of LEDs are arranged side by side along the longitudinal direction of the carriage, or a light guide member is arranged so as to extend along the longitudinal direction of the carriage. Either a light guide system in which LEDs are arranged at one end of the member is adopted.

  Here, when the latter light guide method is adopted, there is a problem of how to secure the connection between the connector provided on the wiring board on which the LED is mounted and the flexible wiring member. In other words, when the light guide method is adopted, the wiring board is assembled to the carriage so that the mounting surface faces the longitudinal direction of the carriage. The insertion direction of the flexible wiring member will not match. Therefore, if this point is not improved at all, the behavior of the flexible wiring member is not stable, and the flexible wiring member obstructs the traveling of the carriage, or the flexible wiring member causes illumination light or reflected light. There is a risk of blocking.

  As a method for solving this, a relay board is connected to one end of the flexible wiring member, and the relay board and the wiring board are connected using lead wires or the like, or a flexible wiring member provided in the connector. The direction of the connection opening is changed to match the insertion direction of the flexible wiring member with respect to the connector and the winding direction of the flexible wiring member, and the guide portion for guiding the flexible wiring member is moved to the carriage. Various methods are envisaged, such as a method of providing a plurality of the flexible wiring members to stably change the direction of the flexible wiring member.

  However, when these solutions are adopted, the manufacturing cost increases due to the increase in the number of parts and the complexity of the assembly work, and the reliability of the electrical connection between the light source and the power supply unit decreases (that is, the occurrence of a connection failure). ), Various problems such as an increase in the space required for connecting the connector and the flexible wiring member (that is, an increase in the size of the apparatus) will occur separately.

  Accordingly, the present invention has been made to solve the above-described problems, and an object of the present invention is to provide a document reading apparatus that can be configured at low cost and in a small size without hindering carriage travel and document reading. And

  A document reading device according to the present invention reads reflected light of a light irradiated on a document and photoelectrically converts the document, and includes a carriage, a wiring board, a light source, a connector, and a power supply unit. And a flexible wiring member. The carriage is provided so as to be able to travel along a first direction parallel to a placement surface on which a document is placed, and in a second direction parallel to the placement surface and perpendicular to the first direction. Extending along. The wiring board is assembled to the carriage and has a mounting surface that is parallel to the first direction and orthogonal to the second direction. The light source is mounted on the mounting surface and emits light for irradiating the document. The connector is mounted on the mounting surface and is electrically connected to the light source. The power source is for supplying power to the light source via the connector. The flexible wiring member is for electrically connecting the connector and the power supply unit, and one end of the flexible wiring member is connected to the connector. The flexible wiring member is formed of a long band-shaped member having a thin dimension in the thickness direction, and has a relaxing portion formed by being bent back along the first direction. The one end of the flexible wiring member is connected to the connector by being inserted into the connector along the second direction. In the document reading apparatus according to the present invention, a bent portion is formed on the flexible wiring member at a portion between the one end connected to the connector and the loosened portion, whereby the flexible The thickness direction of the portion corresponding to the relaxation portion of the conductive wiring member is configured to always face the direction substantially perpendicular to the second direction even when the carriage travels along the first direction.

  In the document reading apparatus according to the present invention, the carriage may have a guide portion that guides the flexible wiring member by inserting the flexible wiring member.

  In the document reading apparatus according to the present invention, it is preferable that the bent portion is located only between the one end connected to the connector and a portion inserted through the guide portion.

  In the document reading apparatus according to the present invention, the opening of the connector into which the flexible wiring member is inserted may extend along the first direction. The extending direction of the flexible wiring member changes its direction by approximately 90 ° because the flexible wiring members overlap each other in a substantially right-angled triangle shape in plan view at a crease provided in the flexible wiring member. It is preferable that at least one portion is included in the bent portion.

  In the document reading apparatus according to the present invention, the opening of the connector into which the flexible wiring member is inserted is along a third direction orthogonal to both the first direction and the second direction. In this case, the flexible wiring members overlap each other in a substantially right triangle shape in plan view at a crease provided in the flexible wiring member. The flexible wiring member is bent without overlapping each other between a portion where the extending direction of the flexible wiring member changes a direction of approximately 90 ° and a crease provided in the flexible wiring member. It is preferable that at least one of the bent portions includes at least one portion in which the extending direction of the conductive wiring member changes a direction of approximately 90 °.

  In the document reading apparatus according to the present invention, the wiring board may be assembled to one end portion in the second direction of the carriage, and in that case, the mounting surface may be mounted on the carriage. It is preferable to face the other end side in the second direction. Further, in that case, the distance in the second direction from the other end of the carriage to the relaxation portion may be longer than the shortest distance in the second direction from the other end of the carriage to the bent portion. preferable.

  The document reading apparatus according to the present invention is provided on the carriage and reflects a reflected light from the document, a second reflecting mirror that reflects the reflected light from the first reflecting mirror, and the second reflecting mirror. A third reflection mirror for reflecting the reflected light from the reflection mirror, a mirror unit provided so as to be able to travel along the first direction and extending along the second direction, and the third reflection; An image sensor that receives reflected light from the mirror and photoelectrically converts it, and an imaging lens system that forms an image of the reflected light from the third reflecting mirror on the image sensor may be further provided.

  In the document reading apparatus according to the present invention, the flexible wiring member is preferably a flexible flat cable.

  According to the present invention, it is possible to provide an original reading apparatus that can be configured at low cost and in a small size without obstructing carriage travel and original reading.

1 is a schematic view of a document reading device in an embodiment of the present invention. 1 is a schematic plan view of a document reading device in an embodiment of the present invention. FIG. 5 is a perspective view showing a state in which various components are assembled to the first carriage of the document reading device in the embodiment of the present invention. FIG. 4 is a perspective view of a first carriage of the document reading device in the embodiment of the present invention. FIG. 3 is a schematic perspective view of the vicinity of a first sliding end portion of a first carriage of the document reading apparatus in the embodiment of the present invention. FIG. 3 is a schematic view of the vicinity of the wiring board of the document reading apparatus in the embodiment of the present invention. It is a perspective view which shows the bending shape of FFC in the original reading apparatus in embodiment of this invention. FIG. 6 is a schematic view of the vicinity of a wiring board of an original reading apparatus according to a first modification. FIG. 10 is a schematic perspective view of the vicinity of a first sliding end portion of a first carriage of a document reading device according to a second modification. FIG. 10 is a schematic diagram in the vicinity of a wiring board of an original reading apparatus according to a second modification. It is a schematic diagram of the vicinity of the wiring board of the document reading apparatus according to a third modification.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The following embodiment shows an example when the present invention is applied to a mirror scanning type document reading apparatus. In the following embodiments, the same or common parts are denoted by the same reference numerals in the drawings, and description thereof will not be repeated.

  FIG. 1 is a schematic view of a document reading apparatus according to an embodiment of the present invention, and FIG. 2 is a schematic plan view. FIG. 3 is a perspective view illustrating a state in which various components are assembled to the first carriage of the document reading apparatus according to the present embodiment, and FIG. 4 is a perspective view of the first carriage. 5 is a schematic perspective view of the vicinity of the first sliding end of the first carriage of the document reading apparatus according to the present embodiment, and FIG. 6 is a schematic view of the vicinity of the wiring board. First, a schematic configuration of the document reading apparatus 1 according to the present embodiment will be described with reference to FIGS. 1 to 6. Note that in FIGS. 1 to 6, some components may be omitted as necessary for easy understanding.

  As shown in FIG. 1, the document reading device 1 includes a housing 2 and a top glass 3. The housing 2 has a box shape with an upper surface opening, and a top glass 3 is assembled to the housing 2 so as to close the upper surface opening of the housing 2. The top surface of the top glass 3 serves as a placement surface 3a on which the document 100 to be read is placed.

  As shown in FIGS. 1 and 2, a first carriage 10 and a second carriage 20 that can travel along the X-axis direction, which is a first direction parallel to the placement surface 3 a, are provided inside the housing 2. It has been. The first carriage 10 and the second carriage 20 both extend along the Y-axis direction, which is a second direction that is parallel to the placement surface 3a and orthogonal to the first direction (that is, the X-axis direction). .

  As shown in FIG. 2, the first sliding end portion 10a and the second sliding end portion 10b are located at both ends of the first carriage 10 in the longitudinal direction (that is, the Y-axis direction). A bridge portion 10c is positioned so as to connect the sliding end portion 10a and the second sliding end portion 10b. A first sliding end 20a and a second sliding end 20b are located at both ends of the second carriage 20 in the longitudinal direction (that is, the Y-axis direction). The bridge portion 20c is positioned so as to connect the two sliding end portions 20b.

  A first slide rail 2a is provided on one inner surface of the pair of side walls positioned relative to each other in the Y-axis direction of the housing 2, and a second slide rail is provided on the other inner surface of the pair of side walls. 2b is provided. The first slide rail 2a and the second slide rail 2b are respectively provided in two stages in the vertical direction in the Z-axis direction shown in the drawing (that is, the direction perpendicular to both the X-axis direction and the Y-axis direction). Yes.

  The first slide end 10a and the second slide end 10b of the first carriage 10 are slidably mounted on the first slide rail 2a and the second slide rail 2b located in the upper stage, respectively. Thus, the first carriage 10 can travel along the X-axis direction. Further, the first sliding end 20a and the second sliding end 20b of the second carriage 20 are slidably mounted on the first sliding rail 2a and the second sliding rail 2b, respectively, located in the lower stage. Thus, the second carriage 20 can travel along the X-axis direction.

  Referring to FIG. 1, both the first carriage 10 and the second carriage 20 are connected to a wire pulley 40 via a wire (not shown). Thus, the first carriage 10 and the second carriage 20 travel along the X-axis direction when the wire pulley 40 is rotationally driven by a drive mechanism such as a motor (not shown). The first sliding end portions 10a and 20a and the second sliding end portions 10b and 20b are provided with slide shoes made of resin having a low friction coefficient, and the first sliding rail 2a and the second sliding end are provided. The rail 2b is provided with a coating layer made of a resin having a low coefficient of friction that comes into contact with the slide shoe. Thereby, smooth travel of the first carriage 10 and the second carriage 20 can be realized.

  Here, at the time of reading a document, the moving speed of the second carriage 20 in the X-axis direction is limited to half the moving speed of the first carriage 10 in the X-axis direction. As a result, the length of the optical path, which will be described later, is always kept constant when the document is read.

  As shown in FIGS. 1 to 3, in addition to the first carriage 10 and the second carriage 20 described above, an LED 4 as a light source and light from the LED 4 are reflected toward the document 100 inside the housing 2. A reflecting plate 5 to be reflected, first to third reflecting mirrors 6A to 6C for reflecting the reflected light from the document 100 three times in total, and an image as an image pickup device that performs photoelectric conversion by receiving the reflected light from the document 100 A sensor 8 and an imaging lens system 7 that forms an image of reflected light from the original 100 on the image sensor 8 are installed.

  The LED 4, the reflecting plate 5, and the first reflecting mirror 6A are all mounted on the first carriage 10 described above, and the second reflecting mirror 6B and the third reflecting mirror 6C are all mounted on the second carriage 20 described above. Has been. On the other hand, the imaging lens system 7 and the image sensor 8 are both disposed on the bottom surface of the housing 2.

  Both the reflecting plate 5 and the first reflecting mirror 6A are disposed on the bridge portion 10c so as to extend along the longitudinal direction of the first carriage 10 (that is, the Y-axis direction). On the other hand, the LED 4 is disposed in a bridge portion 10 c at a portion located near the first sliding end portion 10 a of the first carriage 10. Here, as shown in FIG. 5 and FIG. 6, the LED 4 is made of a surface-mounted component, and is mounted on the mounting surface 14 a of the wiring board 14.

  As shown in FIG. 3, the wiring board 14 on which the LEDs 4 are mounted is fixed so that the non-mounting surface side comes into contact with the heat radiating plate 13 erected on the first carriage 10, thereby the first carriage 10. It is assembled to. Here, as shown in FIGS. 5 and 6, the mounting surface 14a of the wiring board 14 faces the second sliding end 10b side of the first carriage 10, and is in the first direction (that is, the X-axis direction). In parallel to the second direction (that is, the Y-axis direction).

  As shown in FIGS. 2, 3, and 6, the bridge portion 10 c of the first carriage 10 includes a light guide member 12 along the longitudinal direction in addition to the reflection plate 5 and the first reflection mirror 6 </ b> A described above. It is arranged. One end of the light guide member 12 in the longitudinal direction is opposed to the LED 4 mounted on the wiring board 14, whereby the light emitted from the LED 4 is guided by the light guide member 12 and the bridge portion of the first carriage 10. Irradiation is performed from 10c toward the placement surface 3a. In addition, between the wiring board 14 and the light guide member 12, the reflection member 12a is provided so that LED4 may be surrounded, and, thereby, the light radiate | emitted from LED4 does not leak outside but to the light guide member 12. Will be introduced.

  The irradiation method using the light guide member 12 as described above is generally called a light guide method or an edge light method, and the original 100 is moved in the X-axis direction by using a small number of LEDs (one in the present embodiment). It can irradiate in the whole area along. Therefore, when the light guide method is adopted, compared to the so-called array method that requires many LEDs, there is a merit that the influence of individual differences such as color unevenness of the LEDs is less likely to occur, and the wiring on which the LEDs are mounted. The merit etc. which can simplify the structure of a board | substrate are acquired.

  Here, as shown in FIG. 3, in the document reading apparatus 1 according to the present embodiment, the above-described reflecting plate 5, first reflecting mirror 6A, and light guide member 12 are integrated via a resin frame. The irradiation unit 11 is configured to be locked and fixed to the first carriage 10.

  More specifically, as shown in FIG. 4, the bridge portion 10 c of the first carriage 10 has a pair of standing wall portions 10 d extending along the Y-axis direction so as to be positioned relative to each other in the X-axis direction. Each of the pair of standing wall portions 10d is provided with a support plate portion 10e toward the inside. Each of the pair of support plate portions 10e is provided with a locking hole 10f into which a locking claw provided on the bottom surface of the resin frame of the irradiation unit 11 can be inserted. When the irradiation unit 11 is pressed against the first carriage 10 so that the locking claw is inserted into the first carriage 10, the first carriage 10 and the irradiation unit 11 are slid relative to each other so that the locking claw is locked into the locking hole 10f. The irradiation unit 11 is assembled to the first carriage 10 by being locked around the periphery. Note that the irradiation unit 11 is screwed to the first carriage 10 after the locking.

  Here, as described above, by assembling the reflecting plate 5, the first reflecting mirror 6A, and the light guide member 12 using a resin frame, it is possible to ensure the assembly position accuracy of these components with high accuracy. Can be obtained, and the assembling work can be facilitated. Further, as described above, by providing the bridge portion 10c of the first carriage 10 with the pair of standing wall portions 10d extending in the longitudinal direction, the rigidity of the flat and elongated first carriage 10 is increased. As a result, the mechanical strength can be secured and the durability can be improved. Furthermore, by performing screwing after the irradiation unit 11 and the first carriage 10 are locked, the assembly position accuracy and assembly workability of the irradiation unit 11 and the first carriage 10 can be improved.

  As shown in FIG. 3, a reading window portion 11 a is provided at the center of the irradiation unit 11 in the Y-axis direction so as to extend along the X-axis direction. A gap formed between the pair of support plate portions 10e described above is located below the reading window portion 11a, and a first reflecting mirror 6A is installed further below the gap ( (See FIG. 2 etc.) As a result, the reflected light from the document 100 can be guided to the first reflecting mirror 6A through the reading window portion 11a, and an optical path to be described later can be prevented from being blocked by the irradiation unit 11 or the first carriage 10. .

  On the other hand, as shown in FIGS. 1 and 2, the second reflecting mirror 6 </ b> B and the third reflecting mirror 6 </ b> C both extend along the longitudinal direction (that is, the Y-axis direction) of the second carriage 20. 10c.

  Here, the LED 4, the reflecting plate 5, the first to third reflecting mirrors 6 </ b> A to 6 </ b> C, the imaging lens system 7, and the image sensor 8 described above are installed with appropriate positions and angles. An optical path from the placement surface 3a to the image sensor 8 as shown in FIG. Specifically, the light emitted from the LED 4 is directly or indirectly reflected by the reflecting plate 5 and indirectly irradiated onto the original 100, and the reflected light from the original 100 is reflected by the first reflecting mirror 6A. The reflected light from the first reflecting mirror 6A is reflected by the second reflecting mirror 6B, the reflected light from the second reflecting mirror 6B is reflected by the third reflecting mirror 6C, and is reflected from the third reflecting mirror 6C. The reflected light is reduced and imaged on the image sensor 8 by the imaging lens system 7. As a result, the image sensor 8 receives the light reduced and formed on the image sensor 8 and photoelectrically converts the light to read the original.

  As shown in FIGS. 1 and 2, a power supply unit 9 is further installed inside the housing 2. The power supply unit 9 is a part for supplying power to the LED 4 and includes a circuit board on which a power supply circuit and a connector 9a are provided. The power supply unit 9 is disposed on the bottom surface of the housing 2 at a position in the vicinity of the first sliding rail 2a on which the first sliding end 10a of the first carriage 10 slides. .

  As shown in FIGS. 1 to 3, 5, and 6, the LED 4 and the power supply unit 9 include a wiring board 14 on which the LED 4 is mounted, wiring patterns 14 b and 14 c formed on the wiring board 14, and wiring The connector 15 mounted on the mounting surface 14a of the substrate 14 is electrically connected to the connector 15 and the FFC 30 that is a flexible wiring member that connects the connector 9a provided in the power supply unit 9 described above.

  Among these, the FFC 30 is a kind of a covered electric wire in which a plurality of conductive wires are covered with an insulating covering material, and is formed of a long band-like member having a thin dimension in the thickness direction. The FFC 30 can be folded relatively easily, and the folded state can be maintained in a stable manner by forming a crease when folded. In general, even when the FFC is bent, there is no possibility of disconnection of the internal conductive wire as long as a large external force is not repeatedly applied to the bent portion.

  As shown in FIGS. 1 and 2, the FFC 30 is wound around along the X-axis direction, one end 31 thereof is connected to the connector 15 provided on the wiring board 14, and the other end 32 is connected to the power supply unit. 9 is connected to a connector 9a. Here, the FFC 30 has a sufficient length in consideration of the traveling range in the X-axis direction of the first carriage 10 so that the FFC 30 does not become a tensioned state, and an excessive portion thereof extends along the X-axis direction. The slack portion 33 is provided by being bent back. The relaxation part 33 is formed so as to be located on the side opposite to the side where the power supply part 9 is located when viewed from the first carriage 10.

  As shown in FIGS. 3 and 5, a guide portion 16 is provided in the bridge portion 10 c at a portion located in the vicinity of the first sliding end portion 10 a of the first carriage 10. The guide portion 16 is a resin member fixedly provided on the first carriage 10 by so-called outsert molding or the like, and has a claw shape or a substantially annular shape. The FFC 30 is wound around the guide portion 16 so as to pass through the inside thereof, thereby guiding the FFC 30 (more specifically, maintaining the state where the FFC 30 is wound along the X-axis direction). To do).

  Here, as described above, since the so-called light guide method is employed in the document reading apparatus 1 according to the present embodiment, the mounting surface 14 a of the wiring board 14 on which the LEDs 4 are mounted is formed on the first carriage 10. It is in a state facing the second sliding end 10b side. Further, as the connector 15 mounted on the mounting surface 14a of the wiring board 14, in order to avoid a connection failure between the connector 15 and the wiring board 14 due to a load applied when the FFC 30 is inserted and removed, A structure in which the insertion direction is a direction perpendicular to the mounting surface 14a (that is, the opening 15a for inserting the FFC 30 faces the second sliding end 10b side as shown) is used. In this case, as described above, the scooping direction of the FFC 30 and the insertion direction of the FFC 30 with respect to the connector 15 do not coincide with each other, and some measures are required.

  Therefore, in the document reading apparatus 1 according to the present embodiment, as shown in FIGS. 2, 3, and 6, the bent portion 34 is formed in the FFC 30 at a portion near the one end 31 connected to the connector 15 of the FFC 30. The solution to this problem is realized by forming.

  FIG. 7 is a perspective view showing an FFC bent shape in the document reading apparatus according to the present embodiment. Hereinafter, the folding shape of the FFC 30 in the document reading apparatus 1 according to the present embodiment will be described in detail with reference to FIG. 7 and FIG. 6 described above.

  As shown in FIGS. 6 and 7, in the document reading apparatus 1 according to the present embodiment, the opening 15a of the connector 15 into which the one end 31 of the FFC 30 is inserted has the first direction (that is, the X axis direction) and the above. It extends along a third direction (that is, the Z-axis direction) orthogonal to any of the second directions (that is, the Y-axis direction).

  On the other hand, a bent portion 34 formed by bending the FFC 30 four times in total is located at a portion near the one end 31 connected to the connector 15 of the FFC 30. Specifically, the bent portion 34 is bent at the fold provided in the FFC 30 without being overlapped with each other, so that the extending direction of the FFC 30 changes its direction by approximately 90 °, and the FFC 30 The FFCs 30 overlap with each other in a substantially right-angled triangular shape in plan view with the fold line provided at the front and back, and the FFC 30 has a total of four parts, the folded portions 34B and 34D that change the orientation by about 90 °. Yes.

  Among these, in the bent portions 34A and 34C, the fold line is formed in a direction substantially orthogonal to the extending direction of the FFC 30, and the thickness direction of the pair of portions of the FFC 30 bordering on the fold line (that is, the belt-like shape) The direction in which the dimension of the FFC 30 is formed thin is perpendicular to each other. On the other hand, in the folded portions 34B and 34D, the fold is formed obliquely at an angle of approximately 45 ° with the extending direction of the FFC 30, and the thickness direction of the pair of portions of the FFC 30 bordering on the fold is mutually It will be maintained in parallel.

  Here, the bent portions 34A, 34C and the folded portions 34B, 34D are bent from the one end 31 side of the FFC 30 connected to the connector 15 toward the loosened portion 33 side, the bent portion 34A, the folded portion 34B, the bent portion 34C, the folded portion. The parts 34D are provided in this order.

  Accordingly, the FFC 30 extends from the opening 15a of the connector 15 along the Y-axis direction in a state where the thickness direction faces the X-axis direction, and then changes the direction by approximately 90 ° at the bent portion 34A. Then, after extending along the X-axis direction with the thickness direction facing the Y-axis direction, the direction of the folded portion 34B is changed by approximately 90 °, and from the folded portion 34B, the thickness direction faces the Y-axis direction. After extending along the Z-axis direction in the bent state, the direction of the bent portion 34C is changed by approximately 90 °, and the bent portion 34C extends along the Y-axis direction with its thickness direction facing the Z-axis direction. After that, the direction of the folded portion 34D is changed by approximately 90 °, and the folded portion 34D extends along the X-axis direction with its thickness direction facing the Z-axis direction and reaches the above-described relaxing portion 33. become.

  As a result, the bent portion 34 described above is formed in the FFC 30 in the portion between the one end 31 connected to the connector 15 and the relaxing portion 33, so that the thickness direction in the portion corresponding to the relaxing portion 33 of the FFC 30 is the first. Even when the carriage 10 travels along the first direction (that is, the X-axis direction), the carriage 10 always faces in a direction substantially orthogonal to the second direction (that is, the Y-axis direction), and the behavior of the relaxation portion 33 of the FFC 30 is changed. As a result, the FFC 30 can be prevented from obstructing the travel of the first carriage 10 and the second carriage 20, and the FFC 30 can be prevented from blocking illumination light and reflected light.

  Further, by configuring the above configuration, the electrical connection between the LED 4 and the power supply unit 9 can be realized without increasing the number of parts and without complicating the assembling work. Furthermore, by adopting the above configuration, the LED 4 and the power source can be connected without enlarging the space required for the connection between the connector 15 and the FFC 30 while ensuring the reliability of the electrical connection between the LED 4 and the power source unit 9. An electrical connection with the unit 9 can also be realized.

  Therefore, by using the document reading apparatus 1 according to the present embodiment, it is possible to provide a document reading apparatus that can be configured at low cost and in a small size without obstructing carriage travel and document reading.

  In the document reading apparatus 1 according to the present embodiment described above, the bent portion 34 is located only between the one end 31 connected to the connector 15 of the FFC 30 and the portion inserted through the guide portion 16. With this configuration, the behavior of the relaxing portion 33 of the FFC 30 becomes more stable, the FFC 30 hinders the travel of the first carriage 10 and the second carriage 20, and the FFC 30 blocks illumination light and reflected light. The effect that can be prevented is further increased.

  Further, in the document reading apparatus 1 according to the present embodiment described above, in order to prevent the illumination light and the reflected light from being blocked more reliably, the one end 31 than the distance L shown in FIG. 7 (that is, the bent portion 34A). It is preferable to sufficiently reduce the length of the FFC 30 on the side portion. However, when the distance L is extremely small, it is difficult to insert the one end 31 of the FFC 30 into the connector 15, so that the distance L ensures workability when connecting the FFC 30 to the connector 15. However, it should be as short as possible.

  On the other hand, it is preferable to bend the portion of the FFC 30 from the bent portion 34A to the relaxing portion 33 so that the thickness direction is not orthogonal to the X-axis direction. This is because, when the thickness direction of the portion is bent so as to be orthogonal to the X-axis direction, when the first carriage 10 travels, the portion becomes a resistance and the stable travel of the first carriage 10 is hindered. This is because there is a risk that the portion is likely to be loosened and the wire is disconnected, and in order to prevent this, it is preferable to bend the portion as shown in FIGS. 6 and 7.

  Further, in the document reading apparatus 1 according to the present embodiment described above, the bending portion 34 is bent four times in total, but this is from the second sliding end portion 10 b of the first carriage 10 to the relaxation portion 33. This is because the distance in the Y-axis direction is longer than the shortest distance in the Y-axis direction from the second sliding end portion 10 b of the first carriage 10 to the bent portion 34. As described above, the FFC 30 blocks the illumination light and the reflected light by arranging the relaxing portion 33 as far as possible from the second sliding end portion 10b of the first carriage 10 along the Y-axis direction. The effect that can be prevented is further increased.

  Here, as described above, the opening 15a of the connector 15 into which the one end 31 of the FFC 30 is inserted is orthogonal to both the first direction (that is, the X-axis direction) and the second direction (that is, the Y-axis direction). When extending along the third direction (i.e., the Z-axis direction), at least a portion near the one end 31 of the FFC 30 is bent twice so that the direction of 90 ° is changed, whereby the relaxation portion of the FFC 30 The thickness direction in the portion corresponding to 33 can always be directed in a direction substantially orthogonal to the second direction (that is, the Y-axis direction). Hereinafter, a configuration example in that case will be described as an example of a first modification based on the present embodiment.

  FIG. 8 is a schematic view of the vicinity of the wiring board of the document reading apparatus according to the first modification. As shown in FIG. 8, in the first modified example, a bent portion 35 formed by bending the FFC 30 twice in total is located at a portion near the one end 31 connected to the connector 15 of the FFC 30. Yes.

  Specifically, the folding portion 35 includes a folding portion 35A in which the extending direction of the FFC 30 changes its orientation by approximately 90 ° by overlapping the FFCs 30 in a substantially right triangle shape in plan view with the fold provided in the FFC 30 as a boundary. The FFC 30 has two parts in total, that is, a bent portion 35B in which the extending direction of the FFC 30 changes its direction by approximately 90 ° by bending the FFC 30 without overlapping each other at the fold provided in the FFC 30.

  Here, the folded portion 35A and the bent portion 35B are provided in the order of the folded portion 35A and the bent portion 35B from the one end 31 side of the FFC 30 connected to the connector 15 toward the relaxing portion 33 side.

  Accordingly, the FFC 30 extends from the opening 15a of the connector 15 along the Y-axis direction in a state where the thickness direction faces the X-axis direction, and then changes the direction by approximately 90 ° at the turn-up portion 35A. Thus, after extending along the Z-axis direction with the thickness direction facing the X-axis direction, the direction of the bent portion 35B is changed by approximately 90 °, and from the bent portion 35B, the thickness direction faces the Z-axis direction. In this state, it extends along the X-axis direction and reaches the above-described relaxation portion 33.

  Therefore, even when the portion near the one end 31 of the FFC 30 is bent only twice as described above, it is possible to obtain an effect in accordance with the effect described in the above-described embodiment, and it is possible to obtain carriage travel and original documents. Therefore, it is possible to provide a document reading apparatus that can be configured at a low cost and without being obstructed.

  On the other hand, the opening 15a of the connector 15 into which the one end 31 of the FFC 30 is inserted may be provided so as to extend along the first direction (that is, the X-axis direction). Hereinafter, a preferred configuration example in that case will be described as a second modification based on the present embodiment.

  FIG. 9 is a schematic perspective view of the vicinity of the first sliding end of the first carriage of the document reading apparatus according to the second modification, and FIG. 10 is a schematic view of the vicinity of the wiring board. As shown in FIGS. 9 and 10, in the second modification, the opening 15a of the connector 15 into which the one end 31 of the FFC 30 is inserted extends along the first direction (that is, the X-axis direction). ing.

  In this case, a bent portion 36 formed by bending the FFC 30 three times in total is located at a portion near the one end 31 connected to the connector 15 of the FFC 30. Specifically, the folding portion 36 has folding portions 36 </ b> A to 36 </ b> C that change the extending direction of the FFC 30 by approximately 90 ° when the FFCs 30 overlap with each other in a substantially right triangle shape in plan view at the crease provided in the FFC 30. Has a total of three parts.

  In the folded portions 36A to 36C, the folds are formed obliquely at an angle of approximately 45 ° with the extending direction of the FFC 30, and the thickness directions of the pair of portions of the FFC 30 bordering on the folds are parallel to each other. Will be maintained.

  More specifically, the FFC 30 extends from the opening 15a of the connector 15 along the Y-axis direction with its thickness direction facing the Z-axis direction, and then changes the direction by approximately 90 ° at the turn-up portion 36A. After extending along the X-axis direction with the thickness direction facing the Z-axis direction from the folded portion 36A, the direction of the folded portion 36B is changed by approximately 90 °, and the thickness direction from the folded portion 36B is changed to the Z-axis direction. After extending along the Y-axis direction in a state of facing the direction, the direction of the folded portion 36C is changed by approximately 90 °, and from the folded-up portion 36C, along the X-axis direction with its thickness direction facing the Z-axis direction. Extending to the above-described relaxation portion 33.

  As a result, the bent portion 36 described above is formed in the FFC 30 in the portion between the one end 31 connected to the connector 15 and the relaxing portion 33, so that the thickness direction in the portion corresponding to the relaxing portion 33 of the FFC 30 is the first. Even when the carriage 10 travels along the first direction (that is, the X-axis direction), the carriage 10 always faces in a direction substantially orthogonal to the second direction (that is, the Y-axis direction), and the behavior of the relaxation portion 33 of the FFC 30 is changed. As a result, the FFC 30 can be prevented from obstructing the travel of the first carriage 10 and the second carriage 20, and the FFC 30 can be prevented from blocking illumination light and reflected light.

  Therefore, even when configured in this manner, the same effects as those described in the above-described embodiment can be obtained, and the configuration can be made inexpensively and compactly without obstructing the carriage traveling or the reading of the document. It is possible to provide an original reading apparatus capable of

  Here, as described above, when the opening 15a of the connector 15 into which the one end 31 of the FFC 30 is inserted extends along the first direction (that is, the X-axis direction), at least the above-described FFC 30. By bending the portion near the one end 31 once so that the direction changes by 90 °, the thickness direction in the portion corresponding to the relaxing portion 33 of the FFC 30 always has a direction substantially orthogonal to the second direction (that is, the Y-axis direction). It can be made to face. Hereinafter, a configuration example in that case will be described as an example of a third modification based on the present embodiment.

  FIG. 11 is a schematic view of the vicinity of the wiring board of the document reading apparatus according to the third modification. As shown in FIG. 11, in the third modified example, a bent portion 37 formed by bending the FFC 30 only once is located near the one end 31 connected to the connector 15 of the FFC 30. .

  Specifically, the folding portion 37 includes only the folding portion 37A that changes the extending direction of the FFC 30 by approximately 90 ° by overlapping the FFCs 30 in a substantially right-angled triangular shape in plan view with the fold provided in the FFC 30 as a boundary. Have.

  Therefore, the FFC 30 extends from the opening 15a of the connector 15 along the X-axis direction in a state where the thickness direction faces the Z-axis direction, and then changes the direction by approximately 90 ° at the turn-back portion 37A. Then, the thickness direction extends in the X-axis direction with the thickness direction facing the Z-axis direction, and reaches the above-described relaxation portion 33.

  Therefore, even when the portion near the one end 31 of the FFC 30 is bent only once as described above, it is possible to obtain an effect according to the effect described in the above-described embodiment. Therefore, it is possible to provide a document reading apparatus that can be configured at a low cost and without being obstructed.

  In the above-described embodiment of the present invention and its modifications, the case where the wiring board on which the LED as the light source is mounted is provided at a position near one end in the longitudinal direction of the first carriage has been described as an example. However, such a configuration is not necessarily required, and as long as the mounting surface of the wiring board is arranged so as to face the longitudinal direction of the first carriage, the wiring board is located at the center in the longitudinal direction of the first carriage, etc. Of course, the present invention can be applied even in the case of the arrangement.

  Further, in the above-described embodiment of the present invention and the modification thereof, the first carriage is provided with a guide portion that guides scooping along the first direction (that is, the X-axis direction) of the flexible wiring member. Although the case has been described as an example, the guide portion is not necessarily essential. Here, even when the guide portions are provided, the installation position and the number thereof are not particularly limited. For example, the guide portions may be provided on the second carriage in addition to the first carriage. It is good also as providing a guide part only in 2 carriages. If at least the second carriage is provided with the guide portion, the movement of the loosened portion of the flexible wiring member along the second direction (that is, the Y-axis direction) is also caused by the guide portion provided on the second carriage. Since the light is regulated, it is possible to more reliably prevent the reflected light from being blocked by the flexible member.

  Further, in the above-described embodiment of the present invention and its modifications, the case where an LED is used as a light source has been described as an example. However, the light source is not necessarily an LED, and other light emitting elements are used as the light source. Of course, the present invention can be applied even when the above is used.

  Further, in the above-described embodiment of the present invention and the modifications thereof, the case where FFC is used as the flexible wiring member has been described as an example. However, the flexible wiring member is not necessarily FFC. Of course, the present invention can be applied even when another member (for example, FPC) is used as the flexible wiring member.

  In the above-described embodiments of the present invention and modifications thereof, the case where the present invention is applied to a so-called mirror scanner type image reading apparatus has been described as an example. However, the scope of the present invention is not limited thereto. The present invention can be applied to any document reading apparatus provided with a carriage on which a light source is mounted, such as a so-called unit scan type image reading apparatus.

  As described above, the above-described embodiment and its modifications disclosed herein are illustrative in all respects and are not restrictive. The technical scope of the present invention is defined by the terms of the claims, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

  DESCRIPTION OF SYMBOLS 1 Original reading apparatus, 2 housing | casing, 2a 1st sliding rail, 2b 2nd sliding rail, 3 top glass, 3a mounting surface, 4 LED, 5 reflecting plate, 6A 1st reflecting mirror, 6B 2nd reflecting mirror, 6C 3rd reflecting mirror, 7 imaging lens system, 8 image sensor, 9 power supply, 9a connector, 10 1st carriage, 10a 1st sliding end, 10b 2nd sliding end, 10c bridge, 10d standing wall Part, 10e support plate part, 10f locking hole, 11 irradiation unit, 11a reading window part, 12 light guide member, 12a reflecting member, 13 heat sink, 14 wiring board, 14a mounting surface, 14b, 14c wiring pattern, 15 connector , 15a opening, 16 guide, 20 second carriage, 20a first sliding end, 20b second sliding end, 20c bridge, 30 FFC, 3 1 one end, 32 other end, 33 relaxing part, 34-37 bent part, 34A, 34C, 35B bent part, 34B, 34D, 35A, 36A-36C, 37A folded part, 40 wire pulley, 100 original.

Claims (8)

A document reading apparatus that reads a document by receiving reflected light of light irradiated on the document and performing photoelectric conversion,
A carriage that is provided so as to be able to travel along a first direction parallel to a placement surface on which an original is placed, and that extends along a second direction that is parallel to the placement surface and orthogonal to the first direction. When,
A wiring board mounted on the carriage and having a mounting surface parallel to the first direction and perpendicular to the second direction;
A light source mounted on the mounting surface and emitting light for irradiating the document;
A connector mounted on the mounting surface and electrically connected to the light source;
A power supply for supplying power to the light source via the connector;
One end is connected to the connector, and electrically connects the connector and the power supply unit, and includes a long strip-like flexible wiring member formed with a thin dimension in the thickness direction,
The flexible wiring member has a relaxation portion formed by being bent back along the first direction,
The one end of the flexible wiring member is connected to the connector by being inserted into the connector along the second direction,
The bent portion is formed in the flexible wiring member at a portion between the one end connected to the connector and the relaxing portion, so that the portion in the portion corresponding to the relaxing portion of the flexible wiring member is formed. A document reading apparatus configured such that a thickness direction always faces a direction substantially orthogonal to the second direction even when the carriage travels along the first direction.   The document reading apparatus according to claim 1, wherein the carriage includes a guide portion that guides the flexible wiring member by inserting the flexible wiring member.   The document reading apparatus according to claim 2, wherein the bent portion is located only between the one end connected to the connector and a portion inserted through the guide portion. An opening of the connector into which the flexible wiring member is inserted extends along the first direction;
The flexible wiring members extend in an approximately 90 ° direction by overlapping the flexible wiring members in a substantially right triangle shape in plan view at a crease provided in the flexible wiring member. The document reading apparatus according to claim 1, wherein at least one portion is included in the bent portion. An opening of the connector into which the flexible wiring member is inserted extends along a third direction orthogonal to both the first direction and the second direction;
The flexible wiring members extend in an approximately 90 ° direction by overlapping the flexible wiring members in a substantially right triangle shape in plan view at a crease provided in the flexible wiring member. The extending direction of the flexible wiring member is changed by about 90 ° by bending the flexible wiring member without overlapping each other between the portion and the crease provided in the flexible wiring member. The document reading apparatus according to claim 1, wherein at least one portion is included in each of the bent portions. The wiring board is assembled to one end of the carriage in the second direction;
The mounting surface faces the other end of the carriage in the second direction;
The distance in the second direction from the other end portion of the carriage to the relaxation portion is longer than the shortest distance in the second direction from the other end portion of the carriage to the bent portion. The document reading apparatus according to any of the above. A first reflection mirror provided on the carriage and reflecting reflected light from the document;
A second reflecting mirror for reflecting the reflected light from the first reflecting mirror and a third reflecting mirror for reflecting the reflected light from the second reflecting mirror are provided, and provided so as to be able to travel along the first direction. And a mirror unit extending along the second direction,
An image sensor that receives and photoelectrically converts reflected light from the third reflecting mirror;
The document reading apparatus according to claim 1, further comprising an imaging lens system that forms an image of the reflected light from the third reflection mirror on the imaging element.   The document reading apparatus according to claim 1, wherein the flexible wiring member is a flexible flat cable.