JP4685503B2 - Image reading device - Google Patents

Description

  The present invention relates to an image reading apparatus (including a copying machine having an image reading function) that reads an image of a document and generates image data.

  2. Description of the Related Art Conventionally, in an image reading apparatus, a CPU (Central Processing Unit) that operates at a high clock is mounted on a control board in order to control the entire apparatus or process image data generated from a document image. The shield of the apparatus main body is strengthened so that radiation noise (electromagnetic waves) generated by the high clock leaks from the apparatus to the outside and other electronic devices do not malfunction.

  In the conventional image reading apparatus, in order to shield radiation noise between the document conveying section and the apparatus main body that automatically conveys the document to the document reading section and from the document conveying section, the document conveying section covers a predetermined area. The disposed conductive frame is grounded via a hinge portion for enabling opening and closing of the document conveying portion and a conductive frame of the apparatus main body.

  Further, when it is necessary to reinforce the shield, the conductive member attached to the conductive frame on the open / close side of the document transport unit is exposed to the conductive surface exposed on the upper surface of the apparatus main body when the document transport unit is closed. The ground is made in contact with the sex frame. In this case, if a plate spring is used as the conductive member, the user may touch the plate spring and be injured when the user opens and closes the document conveyance unit. Therefore, the plate spring can be used. There wasn't. Therefore, as a substitute, a sponge-like conductive member is attached as follows.

  FIG. 13 is an enlarged vertical cross-sectional view showing a conductive member affixed to a conductive frame on the open / close side of a document conveying section in a conventional image reading apparatus. As shown in FIG. 13, the document conveying section 50 has a conductive frame 51 exposed on the apparatus main body side and a non-conductive cover 54 provided on the frame 51 in the direction opposite to the apparatus main body side. A rectangular sponge-like conductive member 52 is attached to the frame 51 with a double-sided tape 53. When the document conveying section 50 is closed, the conductive member 52 is pressed against the frame 51 by contacting a frame (not shown) of the apparatus main body exposed at a position facing the conductive member 52, thereby conveying the document. The frame 51 of the unit 50 and the frame (not shown) of the apparatus main body are electrically connected and grounded. The solid arrow direction is the upper surface side of the apparatus main body.

For reference, a technique for preventing leakage of radiation noise to the outside of the apparatus is also disclosed and proposed (see, for example, Patent Document 1 and Patent Document 2).
JP 2003-115961 A JP-A-6-118569

  Certainly, in the image reading apparatus configured as described above, since the conductive member 52 has a sponge shape, even when the user touches the conductive member 52 when the document conveying unit 50 is opened and closed by the user, the user is injured. In addition, since the electrical connection between the frame 51 of the document transport unit 50 and the frame of the apparatus main body is taken and the shield is strengthened, the document transport unit 50 and the apparatus main body and the document transport are It is possible to prevent leakage of radiation noise from the unit 50.

  However, in the conventional image reading apparatus, since the conductive member 52 is attached with the double-sided tape 53, the user touches the conductive member 52 and the conductive member 52 is peeled off when the document conveying unit 50 is opened and closed. There was a problem that. Therefore, there is a problem that the effect of preventing leakage of radiation noise to the outside of the apparatus is lost when the document conveying unit 50 is opened and closed.

  SUMMARY OF THE INVENTION In view of the above problems, an object of the present invention is to provide an image reading apparatus capable of shielding radiation noise to the outside of the apparatus without peeling off the conductive member even when the user touches the conductive member. And

In order to achieve the above object, an image reading apparatus according to the present invention is capable of opening and closing a main body having a document reading section for reading an image of a document on an upper surface thereof so as to cover the document reading section. The main body has a conductive first frame that is exposed on the upper surface and is grounded, and the original pressing portion is In the closed state, the conductive second frame is exposed at a position opposite to the first frame, and either the first frame or the second frame has a side surface and a bottom surface. A concave shape is formed, and a conductive member is affixed to the concave shape portion so as to maintain conductivity between the first frame and the second frame in a closed state of the document pressing portion. in which, the Conductive member, and wherein the abutting the side surface of at least the concave portion. With this configuration, when the document pressing portion is opened and closed, the conductive member can be prevented from being peeled off even when the conductive member is contacted by the user, and radiation noise to the outside of the apparatus is shielded. be able to. In addition, since the second frame has a concave shape, the attachment position of the conductive member becomes clear, and the conductive member can be easily attached.

An image reading apparatus according to the present invention includes a main body having a document reading section that reads an image of a document on an upper surface thereof, and a document pressing section that is openable and closable so as to cover the document reading section with respect to the main body. The main body has a conductive first frame grounded on an upper surface of the main body, and the document pressing portion is relative to the first frame in the closed state. The upper surface of a conductive member having a conductive second frame at a position where the projection protrudes toward the side surface on the upper surface side of one opposed side surface is formed on the second frame. In the closed state of the part, it is pasted so as to keep the conductivity between the first frame and the second frame, and the protrusion is fixed by being sandwiched between the pasting member and the non-conductive member It is the first frame, Characterized in that it has issued. With this configuration, the conductive member is sandwiched and fixed by the non-conductive member when the document pressing portion is opened and closed. Can be prevented. Thereby, radiation noise to the outside of the apparatus can be reliably shielded.

An image reading apparatus according to the present invention includes a main body having a document reading section that reads an image of a document on an upper surface thereof, and a document pressing section that is openable and closable so as to cover the document reading section with respect to the main body. The main body has a conductive first frame grounded on an upper surface of the main body, and the document pressing portion is relative to the first frame in the closed state. A lower surface of the projecting portion of the conductive member having a projecting portion projecting to the side surface on the upper surface side of one opposing side surface is a non-conductive member. The protrusion is attached between the second frame and the non-conductive member, and the first frame and the second frame are electrically connected to each other when the document pressing portion is closed. Pinned to be conductive to The first frame is exposed. With this configuration, the conductive member is sandwiched and fixed by the non-conductive member when the document pressing portion is opened and closed. Can be prevented. Thereby, radiation noise to the outside of the apparatus can be reliably shielded.

  The conductive member in the image reading apparatus configured as described above is configured to include a reinforcing material inside the bottom surface including the protrusion. With this configuration, since the reinforcing member is provided in the conductive member when the document pressing portion is opened and closed, even if the conductive member is contacted by the user, the conductive member is further peeled off. Can be prevented.

  As described above, with the image reading apparatus according to the present invention, it is possible to prevent peeling of the conductive member even when the conductive member is contacted by the user when the document pressing portion is opened and closed. In the closed state of the document pressing portion, it is possible to shield radiation noise to the outside of the apparatus.

  Hereinafter, a case where the present invention is applied to a copying machine having an image reading function will be described as an example with reference to the drawings.

  FIG. 1 is a longitudinal sectional view as viewed from the side, schematically showing a case where the document conveying section of the copying machine according to the present invention is in an open state. FIG. 2 is a longitudinal sectional view as seen from the side, schematically showing a case where the document conveying section of the copying machine according to the present invention is in a closed state. FIG. 3 is a longitudinal sectional view, as seen from the front, schematically showing a case where the document conveying portion of the copying machine according to the present invention is in a closed state. Note that the side surface side is a vertical direction side with respect to a case where the operation position when the user operates the operation display unit described later is the front side.

  As shown in FIGS. 1 to 3, the copying machine 1 according to the present invention covers a document reading unit 11 that reads an image of a document on the upper surface of the apparatus body 10 and covers the document reading unit 11 with respect to the apparatus body 10. The document conveying unit 12 is used to automatically convey the document to the document reading unit 11 or to press the document placed on the document reading unit 11, and the document conveying unit 12 and the apparatus main body 10 are combined. The document transport unit 12 includes a hinge unit 13 that can be opened and closed, and an operation display unit 14 including an operation unit (such as a numeric keypad or a touch panel) and a display unit (such as a liquid crystal display). Although not shown in the figure, the copying machine 1 according to the present embodiment includes a CPU that controls the entire apparatus, a memory unit that is used as a storage and work area for various control programs, and the like. Naturally, it includes an image forming unit, a fixing unit, a paper storage unit, a paper transport unit, and the like necessary for the image forming process.

  The apparatus body 10 includes an exterior cover 101 made of a non-conductive resin that covers the apparatus body 10, and a conductive frame (not shown) or wiring (not illustrated) that is exposed on the upper surface of the apparatus body 10 and is covered by the exterior cover 101. And a first frame 102 that is grounded via the like.

  As shown in FIGS. 1 to 3, the document conveying unit 12 reflects light emitted from the document reading unit 11 toward the document on the document reading unit 11 for reading the document image by the document reading unit 11. And a sheet feeding guide 126 having an entrance for a document conveyed to the document reading unit 11. Further, as shown in FIGS. 2 and 3, the document conveying unit 12 has a conductive second frame at a position opposite to the first frame 102 in the closed state of the document conveying unit 12, as will be described later. Thus, a sponge-like conductive member 122 is attached so that the first frame 102 and the second frame are electrically connected. Note that the conductive member 122 may be an elastic and flexible conductive member. Further, the conductive member 122 may be formed of a thin elastic body having a conductive outer periphery and a non-conductive elastic body in the inside thereof.

  Further, the copying machine 1 is provided inside the document conveying unit 12 in order to shield leakage of radiation noise between the document conveying unit 12 near the hinge unit 13 and the apparatus main body 10 and from the document conveying unit 12. A conductive frame (not shown) is electrically connected by a wiring (not shown) in the vicinity of the hinge portion 13 and the like, and the conductive frame (not shown) is covered with the exterior cover 101 of the apparatus body 10. Grounded.

  Further, the copying machine 1 is covered with an outer cover 101 to shield leakage of radiation noise from the side surface and bottom surface of the apparatus main body 10, and a conductive frame (non-conductive) provided on the side surface and bottom surface of the apparatus main body 10. (Shown) is grounded.

  Note that the copying machine 1 according to the present invention electrically connects between the second frame of the document conveying unit 12 and the first frame of the main body device 10 when the document conveying unit 12 is closed, as will be described later. The structure is characterized in that the attached conductive member 122 is prevented from being peeled off by a user's contact.

  Therefore, in the following description, the second frame of the document conveying unit 12 and the first frame of the main body apparatus 10 in the copying machine 1 according to the present invention are pasted so as to be electrically connected when the document conveying unit 12 is closed. A first embodiment of a configuration that prevents the conductive member 122 to be peeled off by user contact will be described with reference to the drawings. FIG. 4 is an enlarged view of the area A shown in FIG. 1 for explaining details of the document conveying section 12 according to the first embodiment.

  As shown in FIGS. 1 to 4, the document conveying unit 12 exposes a conductive second frame 124 made of metal at a position facing the first frame 102 when the document conveying unit 12 is closed. The concave portion 124 a is processed in the second frame 124. A non-conductive exterior cover 125 is attached to a side surface of the second frame 124 and a surface opposite to the first frame 102 side of the second frame 124. A non-conductive double-sided tape 123 is affixed to the conductive member 122 inside the outer periphery of one surface. The conductive member 122 is attached to the recess of the concave portion 124a with the double-sided tape 123 so as to maintain the conductivity between the first frame 102 and the second frame 124 in the closed state of the document conveying portion 12. ing. In the closed state of the document conveying section 12, the conductive member 122 has a sponge shape (that is, an elastic body). Therefore, the conductive member 122 is elastically deformed as shown in FIG. By contacting the first frame 102, the first frame 102 and the second frame 124 are electrically connected. Further, in the closed state of the document conveying section 12, the electrically conductive first frame 102, second frame 124, and conductive member 122 are electrically conductive frames (not shown) or wiring covered with the exterior cover 101. (Not shown) or the like is grounded.

  Further, instead of the double-sided tape 123, an adhesive member capable of electrically connecting the first frame 102 and the second frame 124 via the conductive member 122 in the closed state of the document conveying unit 12 is used. May be used. The adhesive member (for example, double-sided tape 123) may be conductive. In the case where the adhesive member is conductive, the adhesive member may be attached to the entire area of one surface on the second frame 124 side of the conductive member 122. Further, the second frame 124 does not have to be formed of metal, and may be conductive.

  Therefore, as described above, in the case of the copying machine 1 according to the present embodiment, even when the conductive member 122 is touched by the user when the document conveying unit 12 is opened and closed by the user, the conductive member 122 is not touched. The conductive member 122 can be prevented from being peeled off because the conductive member 122 is attached to the concave portion 124a formed on the second frame 124 and the exposed portion of the conductive member 122 is small. Thereby, radiation noise to the outside of the apparatus can be reliably shielded. In addition, since the second frame 124 has a concave shape, the attachment position of the conductive member 122 becomes clear and the conductive member 122 is easily attached.

  Next, in the copying machine 1 according to the present invention, a conductive material that is pasted to electrically connect between the second frame of the document conveying unit 12 and the first frame of the main body device 10 when the document conveying unit 12 is closed. The second embodiment of the configuration for preventing the sex member 122 from being peeled off by the user's contact will be described with reference to the drawings. FIG. 6 is an enlarged view of the area A shown in FIG. 1 for explaining details of the document conveying section 12 according to the second embodiment. Since the configuration other than the area A of the copying machine 1 is the same as the configuration described above, the description thereof is omitted. Further, the same reference numerals as described above are used unless otherwise required.

  As shown in FIGS. 1 to 3 and 6, the document transport unit 12 includes a conductive second frame 124 made of metal at a position facing the first frame 102 when the document transport unit 12 is closed. In addition, a non-conductive exterior cover 125a is provided on a side surface of the second frame 124 and a surface opposite to the first frame 102 side of the second frame 124. A non-conductive double-sided tape 123 is affixed to the conductive member 122 inside the outer periphery of the one surface on the second frame 124 side. In addition, the conductive member 122 is affixed with a double-sided tape 123 so as to maintain conductivity between the first frame 102 and the second frame 124 in the closed state of the document conveying unit 12. Furthermore, a non-conductive exterior cover 125 b is attached to the outer peripheral portion of the side surface of the conductive member 122.

  In the closed state of the document conveying section 12, since the conductive member 122 is sponge-like (that is, an elastic body), the conductive member 122 is elastically deformed and comes into contact with the second frame 124 and the first frame 102. Thus, the first frame 102 and the second frame 124 are electrically connected. Further, in the closed state of the document conveying section 12, the electrically conductive first frame 102, second frame 124, and conductive member 122 are electrically conductive frames (not shown) or wiring covered with the exterior cover 101. (Not shown) or the like is grounded. Note that the conductive member 122 attached to the second frame 124 has at least a part of the outer periphery of the side surface of the conductive member 122 surrounded by the exterior cover 125b to such an extent that the conductive member is not peeled off by contact by the user. Just do it.

  Further, instead of the double-sided tape 123, an adhesive member capable of electrically connecting the first frame 102 and the second frame 124 via the conductive member 122 in the closed state of the document conveying unit 12. May be used. The adhesive member (for example, the double-sided tape 123) may be conductive. When the adhesive member is conductive, the adhesive member is applied to the entire area of one surface on the second frame 124 side of the conductive member 122. It may be pasted. Further, the second frame 124 does not have to be formed of metal, and may be conductive.

  Therefore, as described above, in the case of the copying machine 1 of the present embodiment, even when the conductive member 122 is contacted by the user when the document conveying unit 12 is opened and closed by the user, at least the conductive member 122 is used. Since the exposed portion of the conductive member 122 is small because a part of the outer periphery of the side surface is surrounded by the exterior cover 125b, peeling of the conductive member 122 can be prevented. Thereby, radiation noise to the outside of the apparatus can be reliably shielded.

  Next, in the copying machine 1 according to the present invention, a conductive material that is pasted to electrically connect between the second frame of the document conveying unit 12 and the first frame of the main body device 10 when the document conveying unit 12 is closed. The third embodiment of the configuration for preventing the sex member 122 from being peeled off by the user's contact will be described with reference to the drawings. FIG. 7 is an enlarged view of the area A shown in FIG. 1 for explaining details of the document conveying section 12 according to the third embodiment. Since the configuration other than the area A of the copying machine 1 is the same as the configuration described above, the description thereof is omitted. Further, the same reference numerals as described above are used unless otherwise required.

  As shown in FIGS. 1 to 3 and 7, the document transport unit 12 includes a conductive second frame 124 made of metal at a position facing the first frame 102 when the document transport unit 12 is closed. In addition, a non-conductive exterior cover 125a is provided on a side surface of the second frame 124 and a surface of the second frame 124 opposite to the first frame 102 side. The conductive member 122 has a convex shape having protrusions 122a and 122b on the second frame 124 side (that is, the bottom surface side) of one opposing side surface. A non-conductive double-sided tape 123 is affixed to the inner side of the outer periphery of one surface on the second frame 124 side of the conductive member 122. The conductive member 122 is elastically deformed in contact with the second frame 124 and the first frame 102 in the closed state of the document conveying unit 12, and the first frame 102 and the second frame 124 are electrically connected. As shown in FIG. Further, the protrusions 122a and 122b of the conductive member 122 are fixed while being sandwiched between the L-shaped portions of the non-conductive exterior covers 125b and 125c.

  Further, in the closed state of the document conveying unit 12, the conductive member 122 has a sponge shape (that is, an elastic body), so that the conductive member 122 is elastically deformed and contacts the first frame 102 and the second frame 124. As a result, the first frame 102 and the second frame 124 are electrically connected. Further, in the closed state of the document conveying section 12, the electrically conductive first frame 102, second frame 124, and conductive member 122 are electrically conductive frames (not shown) or wiring covered with the exterior cover 101. (Not shown) or the like is grounded.

  Further, instead of the double-sided tape 123, an adhesive member that can electrically connect the first frame 102 and the second frame 124 via the conductive member 122 in the closed state of the document conveying unit 12 is used. May be used. The adhesive member (for example, the double-sided tape 123) may be conductive. When the adhesive member is conductive, the adhesive member is applied to the entire area of one surface on the second frame 124 side of the conductive member 122. It may be pasted. Further, the second frame 124 does not have to be formed of metal, and may be conductive.

  Therefore, as described above, in the case of the copying machine 1 according to the present embodiment, even when the user touches the conductive member 122 when the user opens and closes the document conveying unit 12, the conductive member 122 is not touched. It has a convex shape having protrusions 122a and 122b on the second frame 124 side (that is, the bottom surface side) of one opposing side surface, and the protrusions 122a and 122b are sandwiched between the exterior covers 125b and 125c. Since it is fixed, peeling of the conductive member 122 can be prevented. Thereby, radiation noise to the outside of the apparatus can be reliably shielded.

  Further, as shown in FIG. 8, a conductive member 122 provided with a reinforcing material 122c such as a PET film [Polyethylene Terephthalate Film] on the second frame 124 side (that is, the bottom surface side) including the protrusions 122a and 122b. May be used. Thereby, since the fixing of the conductive member 122 is further strengthened, even when the user contacts the conductive member 122 when the document conveying unit 12 is opened and closed by the user, the conductive member 122 is prevented from peeling off. be able to.

  Next, in the copying machine 1 according to the present invention, a conductive material that is pasted to electrically connect between the second frame of the document conveying unit 12 and the first frame of the main body device 10 when the document conveying unit 12 is closed. The fourth embodiment of the configuration for preventing the sex member 122 from being peeled off by the user's contact will be described with reference to the drawings. FIG. 9 is an enlarged view of the area A shown in FIG. 1 for explaining details of the document conveying section 12 according to the fourth embodiment.

  As shown in FIGS. 1 to 3 and 9, the document transport unit 12 includes a conductive second frame 124 made of metal at a position facing the first frame 102 in the closed state of the document transport unit 12. In addition, a non-conductive exterior cover 125a is provided on a side surface of the second frame 124 and a surface of the second frame 124 opposite to the first frame 102 side. The conductive member 122 has a convex shape having protrusions 122a and 122b on the second frame 124 side (that is, the bottom surface side) of one opposing side surface. A non-conductive double-sided tape 123 is attached to the first frame side (that is, the upper surface side) of the projecting portions 122 a and 122 b of the conductive member 122. The protrusions 122a and 122b of the conductive member 122 are attached to the L-shaped portions of the non-conductive exterior covers 125b and 125c by the double-sided tape 123, and the protrusions 122a and 122b of the conductive member 122 are non-conductive. The body outer covers 125b and 125c and the second frame 124 are sandwiched and fixed.

  In the closed state of the document conveying unit 12, the conductive member 122 comes into contact with the first frame 102 and the second frame 124 while being elastically deformed, so that the first frame 102 and the second frame 124 are electrically connected. Conduct. Further, in the closed state of the document conveying section 12, the electrically conductive first frame 102, second frame 124, and conductive member 122 are electrically conductive frames (not shown) or wiring covered with the exterior cover 101. (Not shown) or the like is grounded.

  Further, instead of the double-sided tape 123, an adhesive member capable of attaching the conductive member 122 to the exterior covers 125b and 125c as described above may be used. The adhesive member (for example, double-sided tape 123) may be conductive. Further, the second frame 124 does not have to be formed of metal, and may be conductive.

  Therefore, as described above, in the copying machine 1 of the present embodiment, the conductive member 122 has the protrusions 122a and 122b on the second frame 124 side (that is, the bottom surface side) of one opposing side surface. Since the protrusions 122a and 122b are sandwiched and fixed between the second frame 124 and the exterior covers 125b and 125c, the conductive portions 12 are opened and closed by the user when the document conveying unit 12 is opened and closed. Even if the conductive member 122 is touched by the user, the conductive member 122 can be prevented from peeling off. Thereby, radiation noise to the outside of the apparatus can be reliably shielded.

  Further, as shown in FIG. 10, even if a conductive member 122 provided on the second frame 124 side (that is, the bottom surface side) where the reinforcing material 122c such as a PET film includes the protrusions 122a and 122b is used. Good. Thereby, since the fixing of the conductive member 122 is further strengthened, even when the user contacts the conductive member 122 when the document conveying unit 12 is opened and closed by the user, the conductive member 122 is prevented from peeling off. be able to.

  A conductive member 122 that is attached to electrically connect between the document conveying unit 12 and the main body device 10 described in the first to fourth embodiments when the document conveying unit 12 is closed is contacted by the user. As shown in FIG. 3, the structure for preventing the film from being peeled off is one place, but may be provided at a plurality of places as described below with reference to the drawings. FIG. 11 is a diagram schematically showing a case where the document conveying unit 12 of the copying machine 1 according to the present invention is viewed from the document reading unit 11 side. FIG. 12 is a diagram schematically showing a case where the apparatus main body 10 of the copying machine 1 according to the present invention is viewed from above.

  As shown in FIG. 11, the document conveying unit 12 has a closed state between the second frame 124 of the document conveying unit 12 described in the first to fourth embodiments and the first frame 102 of the main body device 10. Among the configurations for preventing the conductive member 122 attached for electrical conduction from being peeled off by a user's contact, at least one configuration is used, and the second frame 124 includes a plurality of conductive members 122. ing. In FIG. 11, the second frame 124 is indicated by a dotted line, but at least the concave portion of the second frame 124 described in the first embodiment is exposed.

  As shown in FIG. 12, the upper surface of the apparatus main body 10 is opposed to the second frame provided with the conductive member 122 outside the region of the contact glass 111 serving as a document image reading window in the image reading unit 11. A plurality of exposed and grounded first frames 102 are provided at positions.

  Further, in the closed state of the document conveying unit 12, the plurality of conductive members 122 are elastically deformed and come into contact with the first frame 102 and the second frame 124, thereby electrically connecting the first frame 102 and the second frame 124. Conductive. Further, in the closed state of the document conveying unit 12, the first frame 102, the second frame 124, and the conductive member 122 that are electrically connected at a plurality of locations are conductive frames (not shown) covered by the exterior cover 101. ) Or grounded via wiring (not shown) or the like, it is possible to enhance the shielding of radiation noise between the document conveying section 12 and the apparatus main body 10 and from the document conveying section 12.

  In the above description (including the first to fourth embodiments), the conductive member 122 provided on the second frame 124 on the side of the document conveying unit 12 is in contact with the user when the document conveying unit 12 is opened and closed by the user. However, at least one of the configurations described in the first to fourth embodiments is used for the first frame 102 on the upper surface of the apparatus main body 10, and a conductive member is used. May be attached. In this case, the exposed second frame 124 is provided at a position facing the first frame 102 to which the conductive member is attached in the closed state of the document conveying unit 12. In the closed state of the document conveying unit 12, the conductive member is elastically deformed and comes into contact with the first frame 102 and the second frame 124, thereby electrically connecting the first frame 102 and the second frame 124. Further, in the closed state of the document conveying unit 12, the conductive first frame 102, second frame 124, and conductive member are conductive frames (not shown) or wires (not shown) covered by the outer cover 101. It is grounded through the like.

  Therefore, even in the configuration in which the conductive member is attached to the first frame 102, it is possible to prevent the conductive member from being peeled off due to the user's contact when the document conveying unit 12 is opened and closed. For this reason, it is possible to stably shield the radiation noise of the copying machine 1.

  The second frame 124 of the document conveying unit 12 and the first frame 102 of the main body apparatus 10 are provided over a predetermined area so that radiation noise from the copying machine 1 can be stably shielded. May be.

  Further, a conductive resin may be formed on the contact glass 111 serving as a document image reading window of the document reading unit 11 to serve as the first frame 102.

  Further, in the above description, the conductive member 122 attached to conduct between the second frame 124 of the document conveying unit 12 and the first frame 102 of the main body device 10 in the copying machine 1 is used when the document conveying unit 12 is opened and closed. In the above description, the structure that prevents the user from peeling off is described. However, instead of the document conveying unit 12, when the document is placed on the document reading unit 11, a document pressing unit for pressing the document is used. The present invention may also be applied to cases.

  The configuration of the present invention can be variously modified in addition to the above embodiment without departing from the spirit of the invention.

  The present invention can be widely applied not only to the copying machine 1 having an image reading function, but also to all image reading apparatuses such as a scanner and a facsimile having an image reading function, and leakage of radiation noise to the outside of the apparatus. This technology is useful for reducing the amount of energy used.

These are the longitudinal cross-sectional views seen from the side which shows typically the case where the manuscript conveyance part of the copying machine concerning the present invention is an open state. These are the longitudinal cross-sectional views seen from the side which shows typically the case where the manuscript conveyance part of the copying machine concerning the present invention is a closed state. These are the longitudinal cross-sectional views seen from the front which show typically the case where the manuscript conveyance part of the copying machine concerning the present invention is a closed state. These are the enlarged views of the area | region A shown in FIG. 1 for demonstrating the detail of the original conveyance part 12 which concerns on 1st Embodiment. FIG. 6 is a view for explaining that the conductive member 122 contacts the first frame 102 and the second frame 124. These are the enlarged views of the area | region A shown in FIG. 1 for demonstrating the detail of the original conveyance part 12 which concerns on 2nd Embodiment. These are the enlarged drawings of the area | region A shown in FIG. 1 for demonstrating the detail of the original conveyance part 12 which concerns on 3rd Embodiment. These are the figures for demonstrating peeling prevention of the electroconductive member 122 when the reinforcing material 122c is provided in the electroconductive member 122 of FIG. These are the enlarged views of the area | region A shown in FIG. 1 for demonstrating the detail of the original conveyance part 12 which concerns on 4th Embodiment. These are the figures for demonstrating the peeling prevention of the electroconductive member 122 when the reinforcing material 122c is provided in the electroconductive member 122 of FIG. FIG. 3 is a diagram schematically showing a case where the document conveying unit 12 of the copying machine 1 according to the present invention is viewed from the document reading unit 11 side. These are figures which show typically the case where the apparatus main body 10 of the copying machine 1 which concerns on this invention is seen from the upper surface. FIG. 6 is an enlarged longitudinal sectional view of a portion where a conductive member is attached to a conductive frame on the open / close side of a document conveying portion in a conventional image reading apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Copier 10 Apparatus main body 101 Exterior cover 102 1st frame 11 Document reading part 12, 50 Document conveyance part 121 Reflecting plate 122,52 Conductive member 122a, 122b Protrusion part 122c Reinforcement material 123,53 Double-sided tape 124 Second frame 125 , 125a, 125b Exterior cover 124a Recessed portion 126 Paper feed guide 13 Hinge portion 14 Operation display portion 51 Frame 54 Cover

Claims (4)

An image reading apparatus comprising: a main body having a document reading unit for reading an image of a document on an upper surface thereof; and a document pressing unit provided to be openable and closable so as to cover the document reading unit with respect to the main body. ,
The main body has a conductive first frame exposed on an upper surface thereof and grounded;
The document pressing portion includes a conductive second frame exposed at a position facing the first frame in the closed state.
Either one of the first frame or the second frame has a concave shape having a side surface and a bottom surface , and a conductive member is provided in the concave shape portion in the closed state of the document pressing portion. Affixed to maintain conductivity between the first frame and the second frame ,
The image reading apparatus, wherein the conductive member is in contact with at least a side surface of the concave portion . An image reading apparatus comprising: a main body having a document reading unit for reading an image of a document on an upper surface thereof; and a document pressing unit provided to be openable and closable so as to cover the document reading unit with respect to the main body. ,
The main body has a conductive first frame grounded on an upper surface thereof,
Further, the document pressing portion has a conductive second frame at a position facing the first frame in the closed state,
In the second frame, the upper surface of the conductive member having a protruding portion projecting to the side surface on the upper surface side of one opposing side surface is the first frame and the second frame in the closed state of the document pressing portion. It is affixed so as to maintain conductivity between the frames, and the protrusion is fixed by being sandwiched between the affixing member and the nonconductive member,
An image reading apparatus, wherein the first frame is exposed. An image reading apparatus comprising: a main body having a document reading unit for reading an image of a document on an upper surface thereof; and a document pressing unit provided to be openable and closable so as to cover the document reading unit with respect to the main body. ,
The main body has a conductive first frame grounded on an upper surface thereof,
Further, the document pressing portion has a conductive second frame at a position facing the first frame in the closed state,
The lower surface of the projecting portion of the conductive member having a projecting portion projecting to the side surface on the upper surface side of one opposing side surface is affixed to the non-conductive member, and the second frame and the non-conductive member The projecting portion is sandwiched and fixed between the conductive members so that the first frame and the second frame are electrically connected in the closed state of the document pressing portion,
An image reading apparatus, wherein the first frame is exposed. The image reading apparatus according to claim 3, wherein the conductive member includes a reinforcing material inside the bottom surface including the protruding portion .

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