JPH04103763U - Image sensor unit - Google Patents

Abstract

(57) [Summary] [Purpose] To prevent the image sensor unit from being affected by electromagnetic waves and magnetism, and to improve performance by removing generated static electricity. Furthermore, the frame can be mass-produced with high precision, and the illuminance of the surface of the read document illuminated by the light source is improved. [Structure] The frame 34 is made of a conductive polymer resin, and a conductive mesh or the like is embedded or a conductive layer is provided on the surface of the frame 34. Furthermore, the inner surface 42 of the light source mounting portion 32 of the frame 34 is made into a reflective surface.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention relates to image sensor units, especially for copying machines, facsimile machines, etc. Used in document reading devices to read image information on documents. The present invention relates to an image sensor unit.

0002

[Conventional technology]

In recent years, the number of documents read by copying machines, facsimiles, and other document reading devices has increased. Close-contact image sensor units are often used for reading. Conventional close contact type FIG. 5 shows a typical example of an image sensor unit. As shown in the figure, The type image sensor unit has a transparent cover 1 that is brought into close contact with the document to be read, and a A belt-shaped light source 2 that illuminates the original to be scanned, and a belt-shaped reader illuminated by the light source 2 A focusing rod lens array 3 that focuses and guides the light reflected by the original, and a focusing rod The band-shaped reflected light guided by the head lens array 3 is reflected by a plurality of photoelectrons arranged in a straight line. An image sensor 4 that performs photoelectric conversion using a conversion element, and A drive circuit board 5 for driving a plurality of photoelectric conversion elements, a transparent cover 1, and a light source. 2. Position the focusing rod lens array 3, image sensor 4 and drive circuit board 5. It is composed of a frame 6 for determining, supporting and fixing. This close-contact image The sensor unit is attached to the document reading device, and the document to be read is placed on the platen. The transparent cover 1 is sequentially transported while being pressed against the reading position by a roller or the like. I am forced to send it. The light reflected from the read document illuminated by light source 2 is reflected by the focusing rod lens. It is photoelectrically converted by the image sensor 4 through the lens array 3 and read. Image information on the document is read.

0003 Next, among the conventional image sensor units, the fully contact type image sensor unit A typical example is shown in Figure 6. As shown in the figure, a fully contact image sensor The unit has multiple photoelectric conversion elements arranged in a straight line so that it can be brought into close contact with the document being read. The installed image sensor 7 and the image sensor 7 are supported and reinforced. drive the transparent support substrate 8 and the plurality of photoelectric conversion elements in the image sensor 7. The image sensor 7 is read through the driving circuit board 9 and the lighting window provided on the image sensor 7. A band-shaped light source 10 that illuminates the original, these image sensors 7, a transparent support substrate 8, The drive circuit board 9 and the light source 10 are positioned, supported and fixed, and the image sensor A slit 11 for illuminating a read document through an illumination window provided in the sensor 7 The frame 12 includes a frame 12. This fully contact image sensor The unit is attached to the document reading device, and the document to be scanned is placed on the platen roller. The reading on the thin transparent cover that protects the photoelectric conversion element of the image sensor 7 by It is sequentially conveyed while being pressed to the picking position. Frame by light source 10 The strip passes through the slits 11 of 12, the transparent support substrate 8 and the illumination window of the image sensor 7. The reflected light from the illuminated original to be read is reflected by a plurality of photoelectric conversion elements of the image sensor 7. The image information on the original is read by photoelectric conversion. has been done.

0004 These close-contact image sensor units and completely close-contact image sensor units The frames 6 and 12 used are made by cutting metal materials such as aluminum and zinc. The material may be machined, drawn, or die-cast. It was However, the frames 6 and 12 formed of metal materials are The weight of the sensor unit is too heavy, and the molding method requires cutting or die casting. Since it is a straight machining process, there is a problem of poor machining accuracy. Also, transparent cover -1 or transparent support substrate 8, assembly of the image sensor unit At the time of processing, the transparent cover 1 and the transparent support substrate 8 are placed in the predetermined positions of the metal frames 6 and 12. When installing the transparent cover 1 and the transparent support substrate 8 in the position shown in FIG. There is a problem with frames 6 and 12 colliding with each other or being pried and chipping. Ta. Furthermore, the metal frames 6 and 12 are susceptible to oxidation and rust on the surface. The oxidized film absorbs the light from the light sources 2 and 10, making it difficult to read the original. There was a problem that the performance of the device gradually deteriorated.

[0005] For this reason, it was proposed to use polymer resin for the frame, and in particular, No. 26067 and Utility Model Application No. 1-70465 are produced by using polymer resin. Discloses thermal countermeasures against thermal deformation, thermal expansion, etc. of the frame. In this way, The above problem was solved by forming the frame from a polymer resin.

[0006]

[Problem that the idea aims to solve]

However, image sensors using frames made of polymer resin Especially in the case of a close-contact type image sensor unit, the subunit is moved in close contact. Static electricity is generated by the original, which charges the frame, and the charged static electricity There was a problem that electricity generated noise. Also, the image sensor The environment in which the subunit or the device in which the image sensor unit is assembled is used. The border was located close to the source of electromagnetic waves, and there was a risk that they would be affected by electromagnetic waves. , the frame made of polymer resin cannot shield electromagnetic waves. There was a problem.

[0007] Therefore, the inventors of the present invention conducted intensive research to solve these problems. I came up with an idea.

[0008]

[Means to solve the problem]

The gist of the image sensor unit according to the present invention is to A light source that illuminates and a light source that receives reflected light from the original that is illuminated by the light source. an image sensor that converts electricity, and at least support and fixation for the light source and the image sensor. In the image sensor unit, the frame is electrically conductive. The reason is that it is made of polymer resin.

[0009] The other main points are the light source that illuminates the original to be read and the light source used by the light source. An image sensor that receives reflected light from an illuminated document and converts it into electricity. , an image sensor comprising at least the light source and a frame for supporting and fixing the image sensor; In the sensor unit, the frame is made of insulating polymer resin or conductive polymer. It is formed by embedding metal mesh, metal foil, metal plate, metal wire, etc. in resin. It's there.

0010 In such an image sensor unit, the conductive polymer resin is an insulating polymer resin. Metal powder, metal flake, metal fiber, carbon black, graphite in child resin , carbon fiber, metallized fiber, metallized glass, etc., or a mixture thereof Kneaded conductive filler consisting of solids, and conductive polymer resin. There is something about it.

[0011] Further, in such an image sensor unit, the conductive polymer resin is The reason is that a conductive layer is provided on a part or the entire surface of the frame.

0012 Furthermore, the other main points are the light source that illuminates the original to be read and the light source used by the light source. An image sensor that receives reflected light from an illuminated document and converts it into electricity. , an image sensor comprising at least the light source and a frame for supporting and fixing the image sensor; In the sensor unit, the frame is made of an insulating polymer resin, and The reason is that a conductive layer is provided on a part or the entire surface of the frame.

[0013] In the image sensor unit described above, the frame is conductive or insulating. The frame is made of polymer resin, and at least the inner surface of the light source mounting portion of the frame is The reason is that it was made possible to reflect the

[0014] In addition, in such an image sensor unit, components may be positioned on the frame. This is because an engaging portion is provided for positioning and fixing.

[0015]

[Effect]

The image sensor unit of the present invention has a light source and a plurality of constituent elements. The frame on which the image sensor consisting of a photoelectric conversion element is attached is made of conductive polymer resin. It is attached to a document reading device such as a facsimile machine. If the document is used in a When static electricity is generated, the static electricity is conducted to the conductive resin frame. It is removed via a grounded document reader. Therefore, the image center The subunit will not be charged with static electricity, and noise due to static electricity will enter. There isn't. In addition, since the frame is made of conductive polymer resin, the image Electromagnetic waves from the external environment in which the image sensor unit is used can cause damage to the conductive resin. It is shielded by the frame to prevent noise from being generated by electromagnetic waves.

[0016] Frames for shielding electromagnetic waves include metal mesh, metal foil, metal plates, and gold. This can be achieved by embedding wires etc. in insulating polymer resin, and these can also be Static electricity can also be removed by embedding it in conductive polymer resin. Also, The conductive polymer resin that forms the frame is made of insulating polymer resin, metal powder, and metal foil. Things made by kneading lakes, metal fibers, etc. or their mixtures to create conductivity, Alternatively, the polymer resin itself may be electrically conductive.

[0017] In addition, one or more conductive layers may be applied to part or all of the surface of the frame mentioned above. A similar effect can be obtained by providing it by plating or applying metal paste. It will be done. Furthermore, when providing a conductive layer on the surface of the frame, the frame is made of an insulating polymer. Even if it is made of resin, its conductive layer removes static electricity, or Electromagnetic waves will be shielded.

[0018] Furthermore, the frame is integrally formed from polymer resin, making it possible to Frames with specific shapes can be mass-produced with high precision. Moreover, the frame For example, the inner surface of the light source mounting part is designed so that it can reflect the light emitted from the light source. Because it is painted white or coated with a metal layer or metal foil, the light source To efficiently illuminate a read document without being absorbed by the frame. Therefore, the light source It can be used as a small output, reducing product cost and running cost. can be reduced.

[0019] Furthermore, the frame of the image sensor unit is made of polymer resin. The engaging part can be easily molded into any shape integrally with the frame. By providing a can be placed accurately.

[0020]

【Example】

Next, an example of the image sensor unit according to the present invention will be explained in detail based on the drawings. explain.

[0021] FIG. 1 shows an embodiment of a complete contact type image sensor unit according to the present invention. same In the figure, the fully contact type image sensor unit 20 is used for reading and reading as described above. An image in which a plurality of photoelectric conversion elements 22 are arranged in a straight line so as to be brought into close contact with a document. image sensor 24 and a transparent plate for supporting and reinforcing the image sensor 24. Drives the support substrate 26 and the plurality of photoelectric conversion elements 22 in the image sensor 24. A drive circuit board 28 that is connected to the image sensor 24 and a lighting window (not shown) provided on the image sensor A band-shaped light source 30 that illuminates the read document through the image sensor 24, The transparent support substrate 26, drive circuit board 28, and light source 30 are positioned and supported and fixed. At the same time, the document to be read is illuminated through the illumination window provided in the image sensor 24. A frame 34 having a light source attachment part 32 for attaching a light source 30 for It is configured with.

[0022] Here, the image sensor 24 that reads the image on the read document in a linear manner has a plurality of The photoelectric conversion elements 22 are arranged in a straight line, and the photoelectric conversion elements 22 are amorphous silicon photoconductive elements and amorphous silicon photodiodes. The main products are amorphous silicon photoelectric conversion devices such as CdS-Se and CdS-Se photoelectric conversion devices. used as. In particular, amorphous silicon photoelectric conversion elements Fas silicon a-Si, hydrogenated amorphous silicon a-Si:H, hydrogenated amorphous In addition to silicon carbide a-SIC:H, amorphous silicon nitride, etc. Amorphous consisting of an alloy of silicon and other elements such as carbon, germanium, and tin pin-type, nip-type, ni-type, PN type, MIS type, heterozygous type, homozygous type, Schottky barrier type or A structure in which these are deposited in a mold or the like is used. Photoelectric conversion element The child 22 has electrodes on both sides of these semiconductor layers, and also comes into sliding contact with the original to be read. A transparent cover made of thin glass is provided on the top surface where the electrodes and semicircular The conductor layer is protected. In addition, a substrate 36 for fixing a plurality of photoelectric conversion elements 22 is An illumination window (not shown) through which light passes is provided corresponding to each photoelectric conversion element 22. The scanner is configured so that the document to be read is illuminated by the light that enters through the illumination window. It is.

[0023] The image sensor 24 made up of the plurality of photoelectric conversion elements 22 is driven to The drive circuit element for reading image information from the image sensor 24 is a drive circuit. It is mounted as a board 28. The drive method incorporated in the drive circuit board 28 Type direct drive system, non-storage type direct drive system, storage type matrix drive system, non-storage type There are a type matrix driving method, and the present invention is not limited to any method. Furthermore, LSI chips are used as drive circuit elements, or a-Si is used as part of the circuit. A TFT or poly-SiTFT may also be used. It also illuminates the scanned document in a strip. As the light source 30, an LED array or the like is mainly used. Sera as an LED array GaAs, GaAlAs, etc. are placed on a semiconductor substrate, glass epoxy substrate, or other printed circuit board. LED chips formed by PN junction arranged in a linear or staggered manner. is used.

[0024] A substrate on which the plurality of photoelectric conversion elements 22 are fixed to form the image sensor 24 36, as shown in FIG. It is positioned and attached to the engagement protrusion 38 provided at a predetermined position of the arm 34. Ru. Further, the drive circuit board 28 also has an engaging protrusion protruding from a predetermined position of the frame 34. 40 and is configured to be engaged and attached. On the other hand, the light source 30 It is attached to a light source attachment part 32 formed integrally with the frame 34. this light The source mounting portion 32 forms a chamber, and the angle of the inner surface 42 of the chamber is such that the angle of the inner surface 42 of the chamber corresponds to the angle of the light emitted from the light source 30. Image of light reflected by the inner surface 42 and placed on the top of the light source mounting part 32 The light is set to be focused on the illumination window of the sensor 24.

[0025] This frame 34 is made of a copolymer resin such as polyethylene terephthalate. modified resin, ABS resin, PS resin, PPE resin, polycarbonate resin Mix appropriate amounts of metal fibers such as stainless steel fibers and copper fibers, metal powder, etc. with fat, etc. conductive polymer resin, and glass fiber or ceramic fiber in this conductive polymer resin. It is made by kneading and strengthening fibers, etc., and is made into one piece by injection molding etc. is formed. The frame 34 made of polymer resin has a light absorption effect. Since it is larger than metal, at least the inner surface 42 of the light source mounting part 32 is coated with white or other color. be coated with paint, or have metals such as chrome applied by plating, etc. A metal foil such as aluminum may be applied to reflect the light from the light source 30. It is like that. The metal or The metal foil is preferably made of a material that is difficult to oxidize, and in particular, a material that reflects light with metallic luster is preferred. Delicious.

[0026] This complete contact type image sensor unit 20 is used for documents such as facsimiles and copying machines. The original is attached to the reading device, and the original is read by a platen roller, etc. Reading position on the thin transparent cover that protects the photoelectric conversion element 22 of the image sensor 24 The objects are conveyed sequentially while being pressed against each other. The light emitted from the light source 30 is directly or by being reflected by the inner surface 42 of the light source attachment part 32 of the frame 34. The original is read into a strip through the bright support substrate 26 and the illumination window of the image sensor 24. illuminate. Reflected light reflected by the surface of the scanned document that is illuminated in a band-like manner is photoelectrically converted by the plurality of photoelectric conversion elements 22 of the image sensor 24, and The image information on the read document is read by the dynamic circuit board 28. There is. When reading a read original, the read original is detected by the image sensor 24. Since it is sent in close sliding contact with the reading section, it is sent to the image sensor unit 20. Static electricity may be generated, but the static electricity is not conducted to the conductive resin frame 34. and is appropriately removed via a grounded document reading device. Also, the image During operation of the sensor unit 20, electromagnetic waves from the external environment are absorbed by the conductive frame 34. This may cause the document reading device to malfunction or cause noise to enter. Prevented.

[0027] Further, in this image sensor unit 20, the frame 34 is made of polymeric material. The engaging convex portion 38, the engaging protrusion 40, the inner surface 42, etc. are integrally formed with grease. Therefore, it can be integrally molded with high precision without requiring any special post-processing. Also, in frame 34 At least the inner surface 42 of the light source mounting part 32 is painted white or has a metal layer. or metal foil to effectively reflect the light emitted by the light source 30 and illuminate the original to be read. Therefore, a light source 30 with a small output can be used, and the image It is possible to reduce the price of the sensor unit 20 and reduce power consumption. It is possible to reduce running costs.

[0028] The image sensor unit according to the present invention is the fully contact type image sensor unit described above. Not only the kit 20 but also the contact type image sensor unit 44 shown in FIG. Can be applied. The basic configuration of the contact image sensor unit 44 is as described above. As described above, the transparent cover 46 that is brought into close contact with the original to be read and the original to be read are A belt-shaped light source 48 that illuminates the image, and a belt-shaped original that is illuminated by the light source 48. Optical system 5 consisting of a focusing rod lens array, etc. that focuses and guides the reflected light. 0 and a plurality of strip-shaped reflected lights guided by the optical system 50 arranged in a straight line. An image sensor 54 that performs photoelectric conversion using an electric conversion element 52, and an image sensor 5 A drive circuit board 56 for driving a plurality of photoelectric conversion elements 52 in 4 and Bright cover 46, light source 48, optical system 50, image sensor 54, and drive circuit board 5 It is composed of a frame 58 for positioning, supporting and fixing the device 6. This secret The wearable image sensor unit 44 is similarly attached to the document reading device, The original to be read is pushed to the reading position of the transparent cover 46 by a platen roller or the like. They are transported one by one while being disciplined. Reading document illuminated by light source 48 The reflected light is photoelectrically converted by the image sensor 54 via the optical system 50. , the image information on the read document is read.

[0029] Regarding the frame 58 used in this contact type image sensor unit 44, The light source mounting portion 60 of the frame 58 is integrally formed of polymer resin. The inner surface 62 of is coated with white paint or plated as described above. Therefore, a metal layer or a metal foil may be applied to prevent light from emitting from the light source 48. The light is reflected and effectively illuminates the original to be read. Kaka The same effects as in the above-mentioned embodiments can also be obtained in the close-contact image sensor unit 44. It is something that can be done.

[0030] Although the present invention is limited to the image sensor unit having the above-mentioned typical form, It also applies to other image sensor units. Also, the frame light The shape of the source mounting part is not only formed by flat surfaces such as slopes, but also by 4, the inner surface 68 of the light source mounting portion 66 of the frame 64 is shaped like a parabola. The light source can be formed in such a way that the light source light can be focused on the reading position of the original to be read. I can do that. Furthermore, in addition to curved surfaces such as parabolic shapes, the light source mounting part has a stepped shape. This step-like inner surface efficiently focuses the light from the light source, making it easy to read. It is also possible to configure the device to illuminate the document to be taken.

[0031] Next, if the frame is made of insulating polymer resin, It is not possible to shield electromagnetic waves, etc., and the image sensor is affected by noise. Sometimes. Therefore, in this invention, as mentioned above, the frame is made of conductive polymer. It is formed by child resin. Insulating polymer resin is used as conductive polymer resin. Metal powder, metal flakes, metal fibers, carbon black, graphite, car Amorphous composites such as carbon fiber, metallized fiber, metallized glass, Co-based Conductive filler made of gold flakes or a mixture of these is kneaded to create conductivity. Resin that has been given properties is used, and the metal material is copper, stainless steel, or glass. Preferably, elites are used. In addition, as a conductive polymer resin, for example, poly Acetylene, polypyrrole, polyanilene vinylene, polythiophene and polyacetic acid The polymer resin itself may be conductive.

[0032] Furthermore, conductive metal meshes and metal plates made of aluminum, copper, etc. Or a frame formed by using metal foil as a base material and embedding it in polymer resin. It may be. In this example, metal mesh or metal foil may be laminated, and laminated By doing so, the electromagnetic wave shielding effect can be enhanced. In addition, alumina such as Co-based By using amorphous alloy, it is possible to shield magnetism, and electromagnetic waves alone can It is also possible to configure it so that it can also shield magnetism. Others, ferrite By selecting the type of electromagnetic wave appropriately, the frequency of the electromagnetic wave can be selected and the image sensor It is also possible to shield only the electromagnetic waves of frequencies that affect. this By imparting conductivity to the frame, noise from the surroundings is blocked. It also effectively removes static electricity generated in the image sensor unit. This makes it possible to provide an image sensor unit with excellent performance.

[0033] Also, if the frame is made of particularly insulating polymer resin, A conductive layer is provided on a part or the entire surface of the frame, and the conductive layer allows the image sensor to be It may also be configured to remove noise from the surroundings of the unit. This conductive layer A metal layer provided as a reflective surface on the inner surface of the light source mounting part in the aforementioned frame. They may also be formed at the same time. The method of providing a conductive layer on the surface of the frame is For example, thermal spraying of metals such as copper, aluminum and zinc, copper paste, silver paste, Application of conductive pastes such as carbon paste and conductive paints, electroplating of metals, Electroless plating, vacuum evaporation, sputtering, ion plating, etc. are used. However, it is not limited in any way. In addition, the conductive layer is not only one layer but also two or more layers. By doing so, it is possible to further enhance the shielding effect against electromagnetic waves. Furthermore , copper foil, aluminum foil, etc. may be applied. Note that the frame is made of conductive polymer. A conductive layer is applied to the surface of the frame, even if it is formed by a secondary resin. Of course, it may be provided.

[0034] Although various embodiments of the present invention have been described above, the present invention is limited to the illustrated embodiments. For example, the overall shape of the frame and the engagement provided on the frame The purpose of this invention is that the shape and number of parts can be changed as appropriate. Various improvements, modifications, and variations have been made based on the knowledge of those skilled in the art without departing from the scope. This can be implemented in any form.

[0035]

[Effect of the idea]

The image sensor unit according to the present invention has a frame made of conductive polymer resin. It can be formed by embedding conductive mesh in polymer resin, etc. A conductive layer is provided on part or the entire surface of the frame, so the image sensor unit It can shield electromagnetic waves and magnetism from around the knit, and it also protects the image sensor unit. It can remove static electricity and improve characteristics such as the S/N ratio of image sensors. A high-quality image sensor unit that is free from noise and malfunctions. We can provide knitwear.

[0036] Additionally, the frame of the image sensor unit according to the present invention is made of polymer resin. Because of this, it can be mass-produced using molding methods such as injection molding. A lightweight, high-precision image sensor unit can be provided at low cost. Ma In addition, the inner surface of the light source mounting part of the frame is designed to reflect the light emitted from the light source. For example, it may be painted white or coated with a metal layer or foil as a reflective surface. This improves the illumination of the scanned document surface by the light source, making it possible to use a light source with low output. This makes it possible to improve performance and reduce product costs. Furthermore, metal layers and By using a material that does not easily oxidize for the metal foil, the reflective effect of the reflective surface will improve over time. Deterioration can be suppressed and performance can be maintained.

[0037] Furthermore, the frame of the image sensor unit according to the present invention is made of polymer resin. Because of this, there are no engaging parts that secure the image sensor board, drive circuit board, etc. The image sensor unit can be molded integrally with the engaging part as a reference. By assembling the parts, assembly man-hours can be reduced and manufacturing costs can be reduced. becomes possible.

[0038]

[Brief explanation of drawings]

FIG. 1 is a side cross-sectional explanatory view showing one embodiment of an image sensor unit according to the present invention.

FIG. 2 is a perspective view showing a frame of the image sensor unit shown in FIG. 1;

FIG. 3 is a side cross-sectional explanatory view showing another embodiment of the image sensor unit according to the present invention.

FIG. 4 is a side cross-sectional explanatory view of a main part of another embodiment of the image sensor unit according to the present invention.

FIG. 5 is a side cross-sectional explanatory view showing an example of a conventional image sensor unit.

FIG. 6 is a side cross-sectional explanatory view showing another example of a conventional image sensor unit.

[Explanation of symbols]

20; Complete contact type image sensor unit (image sensor unit) 22, 52; Photoelectric conversion element 24, 54; Image sensor 26; Transparent support substrate 28, 56; Drive circuit board 30, 48; Light source 32, 60, 66; Light source Attachment parts 34, 58, 64; Frame 38; Engagement protrusion (engagement part) 40; Engagement protrusion (engagement part) 42, 62, 68; Inner surface (reflection surface) 44; Contact type image sensor unit (image sensor unit) 46; transparent cover 50; optical system

Claims (7)

[Scope of utility model registration request] Claim 1: A light source that illuminates a read document, an image sensor that receives reflected light from the read document illuminated by the light source and converts it into electricity, and a frame that supports and fixes at least the light source and the image sensor. An image sensor unit, wherein the frame is formed of a conductive polymer resin. 2. A light source that illuminates a read document, an image sensor that receives reflected light from the read document illuminated by the light source and converts it into electricity, and a frame that supports and fixes at least the light source and the image sensor. An image sensor unit characterized in that the frame is formed by embedding a metal mesh, metal foil, metal plate, metal wire, etc. in an insulating polymer resin or a conductive polymer resin. 3. The conductive polymer resin is a conductive resin made of an insulating polymer resin, metal powder, metal flakes, metal fibers, carbon black, graphite, carbon fibers, metallized fibers, metallized glass, etc., or a mixture thereof. 3. The image sensor unit according to claim 1, wherein the image sensor unit is made of a material kneaded with a filler or a conductive polymer resin. 4. The image sensor unit according to claim 1, wherein a conductive layer is provided on a part or the entire surface of the frame made of conductive polymer resin. 5. A light source that illuminates a read document, an image sensor that receives reflected light from the read document illuminated by the light source and converts it into electricity, and a frame that supports and fixes at least the light source and the image sensor. An image sensor unit, wherein the frame is made of an insulating polymer resin, and a conductive layer is provided on a part or the entire surface of the frame. 6. The frame is made of a conductive or insulating polymer resin, and at least the inner surface of the light source mounting portion of the frame is configured to reflect the light from the light source. An image sensor unit according to any one of items 1 to 5. 7. Claim 1, characterized in that the frame is provided with an engaging portion for positioning and fixing the component.
An image sensor unit according to any one of items 6 to 6.