JP2007037042A - Image reading apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain an image reading apparatus assuring excellent flexibility in use by reducing cost required for transportation and management. <P>SOLUTION: In the CCE unit 110 comprising a CCD line sensor 1 for receiving the reflected light, a CCD substrate 2 to which the CCD line sensor 1 is loaded, and a holding member 3 for holding the CCD line sensor 1 together with the CCD substrate 2, the holding member 3 is provided in the side of light receiving surface of the CCD line sensor 1 loaded on the CCD substrate 2 and the CCD line sensor 1 is held with the pressing pressure by the holding member 3. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an image reading apparatus such as a copying machine, an image scanner, and a facsimile machine using a CCD line sensor as a reading element.

  Conventionally, a CCD (charge coupled device) line sensor is used as a reading element for reading an original image, and reflected light of the illumination light irradiated on the original is reflected on the CCD line sensor via an imaging lens. 2. Description of the Related Art Image reading apparatuses such as copying machines, image scanners, and facsimiles that read image information by imaging are known. In such an image reading apparatus, the CCD line sensor is soldered on a printed circuit board (the substrate to which the CCD line sensor is attached is referred to as “CCD substrate”). It is configured to be attached to a holding member (sheet metal) by screws or the like. However, in recent years, with the demand for high-speed and high-precision image reading in an image reading apparatus, the pixel line clock is also increased in the CCD line sensor, and the amount of heat generated by the CCD line sensor is increasing. .

  In the above configuration, the CCD substrate itself is warped due to the heat generated by the CCD line sensor, and the distance between the optical lens disposed opposite to the CCD line sensor and the CCD line sensor changes, for example. This breaks down and there is a problem that a focus shift easily occurs.

With respect to this problem, for example, as shown in FIG. 7, the CCD line sensor 901 is attached to the CCD substrate 903 via a holding member 902 (attachment plate), that is, the CCD line sensor 901 is mounted on the holding member 902 by a leaf spring 904 or the like. A configuration in which the CCD line sensor 901 fixed and fixed to the holding member 902 is soldered to the CCD substrate 903 by soldering the lead 905 of the CCD line sensor 901 at a position indicated by reference numeral 906 (CCD line sensor 901 There is a technique for reducing the influence of the warp of the CCD substrate 903 due to heat generated by the CCD line sensor 901 on the CCD line sensor 901 (see, for example, Patent Document 1).
JP 2002-171387 A

  In the above prior art, since the holding member 902 is disposed between the CCD line sensor 901 and the CCD substrate 903, the holding member 902 is sandwiched when the CCD substrate 903 is attached to the CCD line sensor 901. It is necessary to perform soldering later (the assembly of the CCD unit using these components is necessary at once). Therefore, compared to the case where only the CCD line sensor 901 is attached to the CCD substrate 903, when the CCD line sensor 901 is attached to the CCD substrate 903 in a state of being combined with the holding member 902, for example, the lead portion of the CCD line sensor 901 is connected to the CCD. As the positioning when passing through the hole of the substrate 903 becomes difficult, the assemblability (handleability) of the CCD unit is deteriorated. Further, in manufacturing the CCD substrate 903 on which the CCD line sensor 901 is mounted, the holding member 902 is naturally provided, and these must be handled with the heavy (heavy) holding member 902 attached.

  Usually, metal-related parts such as sheet metal such as the holding member 902 and electrical-related parts such as the CCD line sensor 901 and the CCD substrate 903 are manufactured at different locations (each manufacturer is a separate company), and then The parts are transported to one place and united. However, in the above configuration, for example, in assembling the CCD substrate 903 and the CCD line sensor 901, it is necessary to transport only the holding member 902 to the manufacturing site, and the heavy holding member 902 is also used for handling the assembly. Costs such as transportation cost or management cost (for example, cost required for a storage place) increase because it is necessary to transport in an attached state.

  The present invention has been made in view of the above circumstances, and can easily assemble a CCD unit (without deteriorating the assemblability), and can be transported with a heavy holding member attached to a CCD substrate. It is an object of the present invention to provide an image reading apparatus that can reduce transportation and management costs without being performed, and that is easy to handle (allows flexible work) in manufacturing and transportation (management).

  An image reading apparatus according to a first aspect of the present invention is an image reading apparatus that irradiates a document with illumination light and receives reflected light from the document by the illumination light to read document image information. A CCD unit having a CCD line sensor that receives light, a substrate on which the CCD line sensor is mounted, and a holding member that holds the CCD line sensor together with the substrate, the CCD unit mounted on the substrate The holding member is provided on the light receiving surface side of the CCD line sensor, and the CCD line sensor is pressed and held by the holding member.

  According to the above configuration, in a CCD unit having a CCD line sensor that receives reflected light, a substrate on which the CCD line sensor is mounted, and a holding member that holds the CCD line sensor together with the substrate, the CCD mounted on the substrate. A holding member is provided on the light receiving surface side of the line sensor, and the CCD line sensor is pressed and held by the holding member.

  According to a second aspect of the present invention, in the image reading apparatus according to the first aspect, in the CCD unit, the CCD line sensor has the light receiving surface abutting against one surface of the holding member and the back surface fixed to the substrate. The holding member further includes a pressing member for pressing and holding the CCD line sensor, and the CCD line sensor is fixed in position while being pressed against the one surface side of the holding member by the pressing member. Is preferred.

  According to this, in the CCD unit, the CCD line sensor is configured such that the light receiving surface side abuts on one surface side of the holding member and the back surface side is fixed to the substrate, and the holding member presses and holds the CCD line sensor. It is assumed that a pressing member is provided, and the position of the CCD line sensor is fixed by the pressing member while being pressed against one surface side of the holding member.

  An image reading apparatus according to a third aspect is the image reading apparatus according to the second aspect, wherein the pressing member is a predetermined elastic member, and the elastic members are disposed at both ends in the longitudinal direction of the CCD line sensor, respectively, and at least one end side. The elastic member urges the CCD line sensor in a direction toward the holding member, the longitudinal direction, and a direction perpendicular to the longitudinal direction with respect to the positioning member protruding from the holding member. It is preferable to position the CCD line sensor with respect to the holding member.

  According to this, the pressing member is a predetermined elastic member, and the elastic member is disposed at both ends in the longitudinal direction of the CCD line sensor, and is positioned at the end of the holding member by the elastic member on at least one end side. The CCD line sensor is biased with respect to the holding member by urging the CCD line sensor in the direction toward the holding member, the longitudinal direction of the CCD line sensor, and the direction perpendicular to the longitudinal direction. The

  According to a fourth aspect of the present invention, there is provided the image reading device according to the third aspect, wherein the CCD line sensor has a lead portion of the CCD line sensor that is separated from the substrate by a predetermined distance from the substrate. The elastic member is a predetermined leaf spring body, and the leaf spring body biases the CCD line sensor relative to the holding member by urging from the back and side surfaces of the CCD line sensor body. Preferably it is done.

  According to this, in the CCD line sensor, the lead portion of the CCD line sensor is fixed to the substrate so that the CCD line sensor main body is separated from the substrate by a predetermined distance, and the elastic member is a predetermined plate. The holding member is urged from the back side of the CCD line sensor main body (the plate spring body can be inserted into the back side because it has the above-mentioned separation portion) and the side surface by the plate spring body. The CCD line sensor is positioned with respect to.

  An image reading apparatus according to a fifth aspect of the present invention is the image reading apparatus according to any one of the first to fourth aspects, wherein the CCD unit is fixed to the substrate by soldering the CCD line sensor and integrated with the substrate. It is preferable that the integrated member is fixed to the holding member by the pressing member.

  According to this, in the CCD unit, after the CCD line sensor is fixed to the substrate by soldering and integrated with the substrate, the integrated member is fixed to the holding member by the pressing member.

  According to the first aspect of the present invention, since the holding member is provided on the light receiving surface side of the CCD line sensor mounted on the substrate, the CCD unit can be easily assembled (without degrading the assemblability). ) In addition, a holding member can be attached (retrofit) to an integrated CCD line sensor and substrate without providing a holding member between the substrate and the CCD line sensor. It is not necessary to transport heavy holding members attached to the substrate, reducing transportation and management costs, etc., and thus good handling (flexible work) in manufacturing and transportation (management) A reading device can be realized.

  According to the second aspect of the present invention, the CCD line sensor whose back side is fixed to the substrate is fixed by the pressing member while being pressed against the one side of the holding member. Attachment of the integrated line sensor and substrate is facilitated.

  According to the third aspect of the present invention, the direction of the CCD line sensor toward the holding member, the longitudinal direction of the CCD line sensor, and the longitudinal direction of the CCD line sensor are perpendicular to the longitudinal direction by the elastic member as the pressing member. Since the CCD line sensor is positioned with respect to the holding member by being biased in the direction, adjustment of the positioning of the CCD line sensor with respect to the holding member can be performed with a simple method and with high accuracy.

  According to the fourth aspect of the present invention, the CCD line sensor is fixed to the substrate so that the CCD line sensor main body is separated from the substrate by a predetermined distance. This improves heat escape and prevents thermal deformation of the substrate due to heat generated by the CCD line sensor. In addition, since the CCD line sensor body is urged from the back and side surfaces thereof by the leaf spring body as an elastic member, the CCD line sensor itself is more securely fixed and accurately positioned. Therefore, it is possible to perform image reading with high accuracy while preventing the focus shift. Further, since the CCD line sensor body is biased by the leaf spring body and the CCD line sensor is positioned with respect to the holding member, the bias to the CCD line sensor for performing the positioning is simply a leaf spring body. This can be easily performed using the configuration.

  According to the fifth aspect of the present invention, in the CCD unit, after the CCD line sensor and the substrate are integrated by soldering, the integrated unit is fixed to the holding member. The operation of manufacturing the substrate and soldering and integrating them, and the operation of manufacturing the holding member and assembling the holding member, the integrated CCD line sensor and the substrate into one, are handled separately. As a result, the CCD unit can be easily assembled (without degrading the assemblability), and there is no need to transport a heavy holding member attached to the substrate, reducing transportation and management costs. As a result, the handling of the CCD unit relating to manufacturing, transportation (management), etc. can be improved (workability can be improved).

  The image reading apparatus according to the present invention will be described below with reference to the drawings. FIG. 1 is a cross-sectional view showing the overall configuration of an image reading apparatus 100 according to the present invention. However, the image reading apparatus 100 is provided in a digital copying machine, for example. In this image reading apparatus 100, a document placed on a document placement table 101 (contact glass) is irradiated by an illumination 102 (exposure lamp), and irradiation light reflected by the document is irradiated with a first optical including the illumination 102. Reflected in the direction of about 90 degrees by the first mirror 104 provided in the unit 103 (scanner), and further reflected in the direction of about 90 degrees by the second mirror 106 and the third mirror 107 provided in the second optical unit 105. Then, the reflected light from the third mirror 107 enters the CCD unit 110 through the imaging lens 109 in the lens unit 108 and forms an image on the CCD line sensor 1 in the CCD unit 110. Details of the lens unit 108 and the CCD unit 110 (CCD line sensor 1) will be described later. The first optical unit 103 irradiates the original with the illumination 102 while moving parallel to the original table 101 (original) when reading the original. At this time, the second optical unit 105 moves in parallel in the same direction as the moving direction at a speed that is approximately ½ of the moving speed of the first optical unit 103. In the CCD unit 110, the reading line of the CCD line sensor 1 and the optical axis L of the incident light are adjusted so as to coincide with each other.

  FIG. 2 is an enlarged detailed view of the lens unit 108 and the CCD unit 110. The lens unit 108 is a unit body that supports the CCD unit 110 and fixes the position of the imaging lens 109 with respect to the CCD unit 110. The lens unit 108 includes an imaging lens 109, a lens base plate 1081, a support frame 1082, and the like. The imaging lens 109 forms an image of the reflected light from the third mirror 107 on the CCD line sensor 1 as described above, and a plurality of optical lenses 1091 having a predetermined shape are built in the lens frame 1092. . The lens base plate 1081 supports (fixes) the imaging lens 109, and is a metal plate having a substantially rectangular external view. The lens base plate 1081 is provided with a fixing member 1083, and the imaging lens 109 is fixed to, for example, a substantially central portion on one end side (incident side of reflected light) of the lens base plate 1081 by the fixing member 1083.

  The support frame 1082 supports the CCD unit 110 and is a metal plate having a substantially “L” cross section. The support frame 1082 includes a counter frame 1084 that is erected in a substantially vertical direction with respect to the lens base plate 1081 and is disposed to face the CCD unit 110. The opposed frame 1084 is formed with a substantially rectangular opening 1085 along the direction indicated by the symbol A (the direction of arrow A), that is, the longitudinal direction, and incident light from the imaging lens 109 passes through the opening 1085. Through the CCD unit 110.

  The support frame 1082 is provided with hooked portions 1086 at appropriate positions on both the left and right sides in the direction of the arrow A, and one end of a biasing spring 34 to be described later is hooked. Further, the support frame 1082 is configured to be fixed to the lens base plate 1081 using a fastening body such as a screw at a pair of left and right fixing positions indicated by reference numeral 1087, for example. However, by adopting a configuration in which the left and right positions are fixed with the fastening body in this way, the position of the support frame 1082 is shifted with respect to the lens base plate 1081 together with the CCD unit 110 by loosening the fastening body ( For example, it is possible to adjust the tilt angle of the CCD unit 110 (the CCD line sensor 1 described later) with respect to incident light in the front-rear direction with respect to the incident light. The direction on the lens unit 108 side of the CCD unit 110 is the front.

  Next, the CCD unit 110 will be described in detail with reference to FIGS. 2 and 3 to 6. FIG. 3 is a perspective view of the CCD unit 110 in a state where it is detached from the support frame 1082, and FIG. 4 is a perspective view of the CCD unit 110 shown in FIG. 3 as viewed from the side (in the direction indicated by the arrow C). 5 is an exploded perspective view of the CCD unit 110, and FIG. 6 is a side sectional view including the support frame 1082 at a mounting position (DD section) of mounting plate springs 32 and 33, which will be described later. Show.

  The CCD unit 110 includes a CCD line sensor 1, a CCD substrate 2, and a holding member 3. The CCD line sensor 1 is a so-called one-dimensional sensor in which a light receiving portion that receives light, that is, a plurality of reading elements (pixels) are linearly arranged in the longitudinal direction (axial direction). The CCD line sensor 1 includes a plurality of leads 12 extending on the side opposite to the light receiving surface 11. Here, when the arrow direction indicated by the symbol E (the direction of the arrow E) is the vertical direction, the lead 12 Are connected to the upper and lower side surfaces of the CCD line sensor 1 in the direction of the arrow A, and the lead 12 is soldered to the CCD substrate 2 and fixed. However, by this soldering, the body of the CCD line sensor 1 floats with respect to the CCD substrate 2, that is, the front surface 21 of the CCD substrate 2 (the surface facing the imaging lens 109 side) and the CCD line sensor. 1 is fixed in a state of being separated from the rear surface 13 by a predetermined distance, that is, having a predetermined gap. An image reading signal from the CCD line sensor 1 is transmitted to the CCD substrate 2 through the lead 12. In addition, by fixing the distanced state, the heat escape due to heat generated by the CCD line sensor 1 can be improved, and the thermal deformation of the CCD substrate 2 can be further prevented.

  The CCD substrate 2 is a strip-shaped printed circuit board that extends in the longitudinal direction of the CCD line sensor 1 on which the CCD line sensor 1 is mounted. A plurality of through holes 22 are formed at positions corresponding to the respective leads 12 on the printed circuit board, and a portion of the lead 12 that protrudes toward the rear surface 23 side of the CCD substrate 2 through the through holes 22 is formed. It is fixed by soldering at a location indicated by reference numeral 231 (see FIGS. 4 and 6).

  The holding member 3 holds the CCD line sensor 1 soldered and integrated with the CCD substrate 2, that is, the CCD line sensor 1 is fixed to the holding member 3 together with the CCD substrate 2, and the support frame 1082. Is to connect the two. The holding member 3 is a metal plate having the same size as that of the CCD substrate 2, and more specifically, the upper and lower ends of the holding member 3 are bent substantially at right angles to the CCD substrate 2 side. It consists of a letter-shaped frame (sheet metal). The holding member 3 has a substantially rectangular opening 31 at a position facing the CCD line sensor 1 in the longitudinal direction, and incident light that has passed through the opening 1085 of the counter frame 1084 is further opened. And reaches the CCD line sensor 1.

  By the way, when the CCD line sensor 1 is fixed to the holding member 3, the CCD line sensor 1 is positioned by the positioning members 39a to 39c. Each of the positioning members 39a to 39c is bent (or protruded) toward the CCD line sensor 1, for example, at the peripheral portion of the opening 31 and the opening 36a described later. This projection is brought into contact with an appropriate position of the CCD line sensor 1, and its movement is restricted together with the urging force of each mounting plate spring 32, 33 described later, so that the CCD line sensor for the holding member 3 is controlled. 1 positioning is performed. Here, the mounting plate spring 32 and the positioning members 39a and 39b perform vertical positioning (and the front-rear direction), and the mounting plate spring 33 and the positioning member 39c perform horizontal positioning (and the front-and-rear direction). However, the number, shape, and installation position of the positioning members are not limited to this. The holding member 3 includes a protrusion 39d on the surface opposite to the CCD line sensor 1, and when the CCD unit 110 is mounted on the support frame 1082, for example, the tip of the protrusion 39d is the opposite frame. It abuts on the surface of 1084.

  The holding member 3 includes a mounting plate spring 32, a mounting plate spring 33, a biasing spring 34, an adjustment screw 35, and the like. A pair of attachment springs 32 are provided on both the left and right sides across the opening 31 for attaching the CCD line sensor 1 to the holding member 3 together with the CCD substrate 2. For example, the central portion is on the CCD substrate 2 side. It is a substantially strip-shaped leaf spring body (elastic member) bent in a concave shape (see FIG. 5). The attachment leaf spring 32 presses the CCD leaf sensor 1 from the back surface (rear surface 13) of the gap portion (gap portion 14) indicated by reference numeral 14 at the left and right ends of the CCD line sensor 1 in the longitudinal direction. The surface 321 or the concave part (concave part 320) is pressed and fixed to the holding member 3 so as to be drawn in the direction indicated by the symbol F (arrow F direction), that is, the holding member 3 side. This can also be said to be fixed with the mounting plate spring 32 and the holding member 3 sandwiching the left and right ends of the CCD line sensor 1. At this time, as shown in FIG. 5, the left and right mounting leaf springs 32 are respectively connected to the openings 36 a and 36 b where the concave portions 320 are formed on both ends of the opening 31, and the concave portions 320 are the rear surfaces of the holding member 3. They are fitted from the front surface 37 side so as to protrude to the side 38 and are screwed together at positions indicated by reference numerals 3221 and 3222 with a pair of upper and lower screws 322 to be fastened to the holding member 3 together with the CCD line sensor 1.

  With such a mounting plate spring 32, the CCD line sensor 1 is moved in the direction toward the holding member 3 (in the direction of arrow F) and in the vertical direction (perpendicular to the longitudinal direction of the CCD line sensor 1) with respect to the positioning members 39a and 39b. In other words, the CCD line sensor 1 is positioned with respect to the holding member 3.

  In the bent portion (corner portion) on the front side of the concave portion 320 in the mounting plate spring 32, a notch portion 323 is formed from the left and right end sides to narrow the width of the plate spring, thereby the plate spring. In other words, the urging force in the direction toward the holding member 3 and the vertical direction of the CCD line sensor 1 is easily obtained.

  Next, the mounting plate spring 33 is used to mount the CCD line sensor 1 to the holding member 3 in a pair with the mounting plate spring 32, and in particular, positioning the CCD line sensor 1 in the left-right direction (longitudinal direction). The urging in the left-right direction is performed to perform the above. The attachment leaf spring 33 is formed of a belt-like leaf spring body (elastic member), as with the attachment leaf spring 32, and its shape is substantially parallel to the side surface 15 of the CCD line sensor 1 as shown in FIG. It is bent so that it can bend in the direction. The mounting plate spring 33 is held by pressing the pressing surface 331 against the side surface 15 and pressing it in the direction indicated by the arrow G (arrow G direction; the longitudinal direction) to bias the positioning member 39c. The CCD line sensor 1 is positioned with respect to the member 3. At this time, the attachment leaf spring 33 is screwed at a position indicated by reference numeral 3321 by a screw 332.

  A notch 333 is formed at the end of the mounting plate spring 33, and the mounting plate spring 33 is rotated in the vertical direction, for example, by fitting (hanging) the notch 333 to the protrusion 3331. It is configured so that the positioning is performed more reliably. Here, the mounting plate springs 33 are provided only on one side of the CCD line sensor 1, but the present invention is not limited to this, and the mounting plate springs 33 may be provided on both the left and right sides and urged from both sides.

  In any case, in the present embodiment, only the CCD line sensor 1 is held (contacted) by the holding member 3 (mounting plate springs 32, 33), and no direct holding is performed on the CCD substrate 2. That is, by holding the CCD line sensor 1, the CCD substrate 2 connected to the CCD line sensor 1 via the lead 12 is also indirectly held.

  The urging spring 34 is used together with an adjusting screw 35 to be described later to perform so-called tilt adjustment and vertical / horizontal position adjustment of the CCD unit 110, that is, the light receiving surface 11 of the CCD line sensor 1. The urging springs 34 are, for example, coil springs (springs), and are provided at both ends of the holding member 3 in the longitudinal direction. However, FIGS. 3 to 6 show only the biasing spring 34 on one side. The urging spring 34 has predetermined latching portions 341 and 342 at both ends thereof on the latching portion 3411 (projection) of the holding member 3 and the latching portion 1086 (see FIG. 2) of the support frame 1082, respectively. The holding member 3 is latched in a state having an urging force (tension), whereby the holding member 3 faces the imaging lens 109 side and the lower side of the opposing frame 1084 with respect to the opposing frame 1084 (FIGS. 2 and 6). (In the diagonally downward direction indicated by the symbol H). Note that the hooked portion 1086 of the support frame 1082 does not need to be provided on the opposing frame 1084, and may be provided on the horizontal plane side indicated by reference numeral 1086 '(see FIG. 6). By arranging in this way, a larger urging force can be obtained.

  The adjustment screw 35 is used together with the urging spring 34 to adjust the tilt of the light receiving surface 11 and the vertical and horizontal positions as described above. The adjusting screw 35 is loosely fitted on a screw receiving base 351 that protrudes toward the imaging lens 109 at both left and right ends of the holding member 3. Further, as shown in FIG. 6, the adjusting screw 35 is a hooking member in which the upper end portion of the support frame 1082 is bent toward the imaging lens 109 between the screw head of the adjusting screw 35 and the screw receiving base 351. 1088 is screwed. In this state, each adjustment is performed by rotating the left and right adjustment screws 35 by a required amount.

  As described above, according to the image reading apparatus 100 of the present invention, the CCD line sensor 1 that receives reflected light, the CCD substrate 2 on which the CCD line sensor 1 is mounted, and the CCD line sensor 1 are held together with the CCD substrate 2. In the CCD unit 110 having the holding member 3, the holding member 3 is provided on the light receiving surface 11 side of the CCD line sensor 1 mounted on the CCD substrate 2, and the CCD line sensor 1 is pressed and held by the holding member 3. The Thus, the holding member 3 is provided on the light receiving surface 11 side of the CCD line sensor 1 mounted on the CCD substrate 2 (since the holding member 3 is disposed on the front side of the CCD line sensor 1 and the CCD substrate 2). The CCD unit 110 can be easily assembled (without degrading the assemblability), and the CCD line sensor 1 can be provided without the holding member 3 between the CCD substrate 2 and the CCD line sensor 1. The holding member 3 can be attached (retrofitted) to the CCD substrate 2 and the CCD substrate 2 integrated with each other, and it is not necessary to transport the heavy holding member 3 attached to the CCD substrate 2 for transportation. Therefore, it is possible to reduce the management cost and the like, and in turn, an image reading apparatus that is easy to handle (allows flexible work) in manufacturing, transportation (management), etc. It is possible to realize a 100.

  Further, in the CCD unit 110, the CCD line sensor 1 is such that the light receiving surface 11 side is in contact with one surface side of the holding member 3 and the back side is fixed to the substrate, and the holding member 3 presses and holds the CCD line sensor 1. It is assumed that a pressing member (mounting plate springs 32, 33) is provided, and the position of the CCD line sensor 1 is fixed while being pressed against one surface of the holding member 3 by the pressing member. In this way, the CCD line sensor 1 whose back side is fixed to the CCD substrate 2 is fixed in position while being pressed against the one surface side of the holding member 3 by the pressing member. The line sensor 1 and the CCD substrate 2 can be easily attached.

  Further, the pressing member is a predetermined elastic member (mounting plate springs 32, 33), and the elastic members are respectively disposed at both ends in the longitudinal direction of the CCD line sensor 1, and at least one elastic member on one end side holds the holding member. 3, the CCD line sensor 1 is urged in the direction toward the holding member 3, the longitudinal direction, and the direction perpendicular to the longitudinal direction. Thus, the CCD line sensor 1 is positioned with respect to the holding member 3. Thus, the elastic member as the pressing member urges the CCD line sensor 1 in the direction toward the holding member 3, the longitudinal direction, and the direction perpendicular to the longitudinal direction with respect to the positioning member. Since the CCD line sensor 1 is positioned with respect to the holding member 3, the positioning adjustment of the CCD line sensor 1 with respect to the holding member 3 can be adjusted with a simple method and with high accuracy.

  Since the CCD line sensor 1 is fixed to the CCD substrate 2 so that the main body of the CCD line sensor 1 is separated from the CCD substrate 2 by a predetermined distance, even if the CCD line sensor 1 generates heat, Thermal escape is improved, and thermal deformation of the CCD substrate 2 due to heat generated by the CCD line sensor 1 can be prevented. In addition, the CCD line sensor 1 is positioned with respect to the holding member 3 by being urged from the back and side surfaces thereof by the plate spring bodies (attachment plate springs 32 and 33) as elastic members. Since 1 itself is more reliably fixed and accurately positioned, it is possible to perform image reading with high accuracy while preventing a focus shift. Further, the body of the CCD line sensor 1 is biased by this leaf spring body, and the CCD line sensor 1 is positioned with respect to the holding member. Therefore, the leaf spring body is biased against the CCD line sensor 1 for performing the positioning. This can be easily performed using the simple configuration.

  Further, in the CCD unit 110, after the CCD line sensor 1 is fixed to the CCD substrate 2 by soldering and integrated with the CCD substrate 2, the integrated one is positioned on the holding member 3 by the pressing member. Fixed. Thus, in the CCD unit 110, after the CCD line sensor 1 and the CCD substrate 2 are integrated by soldering, the integrated unit is fixed to the holding member 3, so that the CCD line sensor 1 and An operation of manufacturing the CCD substrate 2 and soldering and integrating them, and an operation of manufacturing the holding member 3 and assembling the holding member 3 and the integrated product of the CCD line sensor 1 and the CCD substrate 2 into one. And the CCD unit 110 can be easily assembled (without degrading the assemblability), and it is necessary to transport the heavy holding member 3 attached to the CCD substrate 2. It is possible to reduce transportation and management costs, etc., and as a result, the CCD unit 110 can be handled in terms of manufacturing and transportation (management). Can Kusuru (improving workability). In addition, this invention can take the following aspects.

  (A) In the above embodiment, the CCD line sensor 1 is attached to the holding member 3 by urging the CCD line sensor 1 using the attachment plate springs 32, 33, etc., but this is not limitative. However, the point is that the mounting method can integrate the holding member 3 with the CCD line sensor 1 and the CCD substrate 2 integrated by soldering or the like (that is, the CCD line sensor 1 and the CCD substrate). Any attachment method may be used as long as the holding member 3 is not sandwiched between the substrate 2 and the substrate 2.

  (B) The mounting position of the mounting leaf spring 32 (or leaf spring 33) to the CCD line sensor 1 may not be the left and right end portions, but may be, for example, the central portion (position where the lead 12 does not exist). .

  (C) From the viewpoint of improving the mounting and heat dissipation of the CCD line sensor 1 with respect to the holding member 3 using the mounting plate spring 32 or the like, the gap portion (separating portion) is provided between the CCD line sensor 1 and the CCD substrate 2. ) Is preferable, but a configuration without the gap portion may be employed. In this case, for example, the upper and lower and / or left and right side portions of the CCD line sensor 1 are pressed and held by the mounting plate spring (the pressing and holding from the back side is not performed), and the CCD line sensor 1 is attached to the holding member 3. You may do it.

1 is a cross-sectional view illustrating an overall configuration of an image reading apparatus according to the present invention. FIG. 2 is an enlarged detail view of a lens unit and a CCD unit shown in FIG. 1. It is a perspective view of the said CCD unit of the state removed from the support frame. FIG. 4 is a perspective view when the CCD unit shown in FIG. 3 is viewed from the side (in the direction indicated by the arrow C). It is a disassembled perspective view of a CCD unit. It is side sectional drawing containing a support frame in the attachment position (DD cross section) of an attachment leaf | plate spring. It is a schematic sectional drawing of the conventional CCD unit.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 CCD line sensor 11 Light-receiving surface 14 Gap part 2 CCD board | substrate (board | substrate)
3 Holding member 32, 33 Mounting leaf spring (pressing member, elastic member)
34 Biasing spring 35 Adjustment screw 39a to 39c Positioning member 39d Projection body 320 Concave portion 12 Lead 100 Image reading device 108 Lens unit 1081 Lens base plate 109 Imaging lens 1082 Support frame 1084 Opposing frame

Claims (5)

An image reading device that irradiates a document with illumination light and receives reflected light from the document by the illumination light to read document image information,
A CCD line sensor for receiving the reflected light;
A substrate on which the CCD line sensor is mounted;
A CCD unit having a holding member for holding the CCD line sensor together with the substrate;
The CCD unit is
An image reading apparatus, wherein the holding member is provided on a light receiving surface side of a CCD line sensor mounted on the substrate, and the CCD line sensor is pressed and held by the holding member. In the CCD unit,
In the CCD line sensor, the light receiving surface is in contact with one surface of the holding member, and the back surface is fixed to the substrate.
The holding member further includes a pressing member for pressing and holding the CCD line sensor, and the CCD line sensor is fixed in position while being pressed against the one surface side of the holding member by the pressing member. The image reading apparatus according to claim 1. The pressing member is a predetermined elastic member,
The elastic members are disposed at both ends in the longitudinal direction of the CCD line sensor, and at least one elastic member on the one end side is used to position the CCD line sensor relative to a positioning member protruding from the holding member. 3. The image reading apparatus according to claim 2, wherein the CCD line sensor is positioned with respect to the holding member by urging in a direction toward the direction, the longitudinal direction, and a direction perpendicular to the longitudinal direction. In the CCD line sensor, the lead portion of the CCD line sensor is fixed to the substrate so that the CCD line sensor main body is separated from the substrate by a predetermined distance,
The elastic member is a predetermined plate spring body, and the CCD line sensor is positioned with respect to the holding member by the biasing from the back and side surfaces of the CCD line sensor main body by the plate spring body. The image reading apparatus according to claim 3. The CCD unit is
The CCD line sensor is fixed to the substrate by soldering and integrated with the substrate, and the integrated member is fixed to the holding member by the pressing member. The image reading apparatus according to claim 1.

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