JP2014044448A - Electronic apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electronic apparatus capable of reducing the length of wiring and improving workability of maintenance of an apparatus body.SOLUTION: An image forming device 10 comprises: an image forming unit 20; an electrical circuit board 120; a rotation support member 130; an outer cover 140; and a harness 150. The image forming unit 20 is disposed in the image forming device 10. The electrical circuit board 120 controls the image forming unit 20. The rotation support member 130 is disposed more outward with respect to the image forming unit 20 and supports the electrical circuit board 120. The rotation support member 130 is formed into a rectangular shape having length 131 in a vertical direction shorter than length 132 in a horizontal direction, and can rotate about a rotation shaft 135 between a closed position and an open position. The outer cover 140 is disposed more outward with respect to the rotation support member 130. The harness 150 connects the image forming unit 20 and the electrical circuit board 120 so as to pass through a rotation shaft 135 side of the rotation support member 130.

Description

  The present invention relates to an electronic device including a rotation support member that supports an electric circuit board.

  Among general electronic devices, for example, in the case of a copying machine, with the increase in color and speed, the number of electrical components such as electrical boards that electrically control the device body continues to increase rapidly. It is required to reduce the installation space by reducing the size. For this reason, by arranging the electrical components on the back side of the device body and overlaying the electrical boards etc., it is possible to respond to the rapid increase of such electrical components and meet the demand for space saving. Yes.

  For example, in a color image forming apparatus using a tandem method, a driving unit that drives a photosensitive drum and other devices of each image forming unit, and a driving unit that makes contact and separation between each photosensitive drum and the intermediate transfer belt; A driving unit that drives a transport mechanism that transports the paper is arranged in parallel on the back surface of the image forming apparatus.

  Then, a low voltage power supply substrate that supplies power to the image forming apparatus, development of toner on each photosensitive drum, transfer of the toner image from each photosensitive drum to the intermediate transfer belt, and transfer of the toner image from the intermediate transfer belt to the paper Electric circuit boards such as a high-voltage power supply board that supplies a voltage of several hundreds to thousands of volts applied to perform transfer, an I / O board that manages input / output of various signals, and a control board that processes image information Are arranged in a stacked manner in order to make the outer dimensions of the image forming apparatus compact.

  When performing maintenance or the like of the image forming apparatus, it is necessary to sequentially remove each substrate from the control substrate disposed on the outermost side on the back side. For this reason, the maintenance work becomes complicated.

  In order to solve such a problem, a functional unit such as a drive unit is provided on the outer surface of the image forming apparatus main body, and a substrate support member that can be opened and closed is attached to the image forming apparatus main body so as to cover the functional unit. There is one in which an electric circuit board is housed in a board support member, the board support member is opened, and a functional unit is exposed to facilitate maintenance (for example, see Patent Document 1).

JP 2005-215199 A

  In Patent Document 1, wiring of wires, harnesses, and the like that connect the electric circuit board and the functional unit of the apparatus main body has been performed randomly.

  For this reason, in the electrical circuit board housed in the board support member, when the connector terminal or the like is disposed at a location away from the rotation axis of the board support member, the wiring drawn from the apparatus main body is routed on the electrical circuit board. In order to connect to an appropriate connector terminal, it is necessary to route an extra length in addition to the distance from the predetermined functional unit to the connector terminal. That is the length required to rotate the substrate support member to the open position. Therefore, the total length of wiring must be longer than necessary, which is not rational.

  In addition, the substrate support member of Patent Document 1 is attached to the apparatus main body so as to be openable and closable by a pivot axis or a hinge so as to be pivotable about the vertical direction as a pivot axis. Is formed in a rectangular shape longer than the length in the vertical direction.

  For this reason, when the substrate support member is rotated to the open position, a considerable space is required. There is usually little space on the back of the device body. Therefore, the opening / closing support member is relatively small on the side close to the rotation axis, and when performing the attaching / detaching operation on the functional unit during maintenance, it is necessary to remove the opening / closing support member containing the electric circuit board from the apparatus main body. was there.

  In view of the above problems, an object of the present invention is to provide an electronic device that can reduce the length of the wiring and can improve the maintenance workability of the device body.

  The electronic device of the present invention includes a functional unit, an electric circuit board, a rotation support member, an exterior cover, and wiring.

  The functional unit is disposed inside the electronic device main body and has a drive unit. The electric circuit board controls the functional unit. The rotation support member is disposed outside the functional unit and supports the electric circuit board. The rotation support member is formed in a rectangular shape whose length in the vertical direction is shorter than the length in the horizontal direction, and has a closed position and a function that cover the functional unit around a rotation axis formed on one side in the horizontal direction. It can be rotated between an open position where the unit is exposed. The exterior cover is disposed separately from the rotation support member and exposes the rotation support member to the outside in a state where the rotation support member is in the closed position. The wiring connects the functional unit and the electric circuit board so as to pass the rotation axis side of the rotation support member.

  In this configuration, since the wiring connects the functional unit and the electric circuit board so as to pass the rotation axis side of the rotation support member, the rotation support member rotates from the closed position to the open position. Even wiring is not stretched. Therefore, since it is not necessary to route the wiring extra, the total length of the wiring can be shortened.

  In this configuration, the rotation support member is formed in a rectangular shape whose vertical length is shorter than the horizontal length, and rotates around a rotation axis formed on one side in the horizontal direction. Less space is required when rotating from the closed position to the open position. Therefore, since the rotation support member can be sufficiently rotated to the open position during maintenance of the electronic device main body, the workability of maintenance of the electronic device main body can be improved.

  The electronic device according to the present invention can reduce the length of the wiring and can improve the maintenance workability of the device body.

1 is a front view illustrating a configuration of an image forming apparatus according to a first embodiment of the present invention. 1 is a right side view illustrating a main configuration of an image forming apparatus according to a first embodiment of the present invention. 1 is a rear view showing a main configuration of an image forming apparatus according to a first embodiment of the present invention. FIG. 3 is a right side view of the image forming apparatus for showing a rotation direction of a rotation support member. It is a perspective view of an image forming device for showing the state where a rotation support member is located in an open position. FIG. 4 is a right side view of the image forming apparatus for showing a stay that holds a rotation support member positioned at an open position. FIG. 6 is a right side view illustrating a main configuration of an image forming apparatus according to a second embodiment of the present invention. FIG. 3 is a right side view of the image forming apparatus for showing a rotation direction of a rotation support member. FIG. 4 is a right side view of the image forming apparatus for illustrating a state in which a rotation support member is located at an open position. FIG. 4 is a right side view of the image forming apparatus for showing a stay that holds a rotation support member positioned at an open position. It is a figure which shows the modification of FIG.

  Hereinafter, electronic devices according to embodiments of the present invention will be described in detail with reference to the drawings.

  First, a first embodiment of the present invention will be described.

  FIG. 1 is a front view showing a configuration of an image forming apparatus 10 according to the first embodiment of the present invention.

  Here, the image forming apparatus 10 will be described as an example of the electronic apparatus. As shown in FIG. 1, the image forming apparatus 10 operates in an image forming mode of either a monochrome image forming mode or a full color image forming mode, and forms a single color or a multicolor image on a sheet based on image data. Examples of the paper include sheet-like recording media such as plain paper, thick paper, photographic paper, and OHP film.

  The image forming apparatus 10 includes a plurality of image forming units 20A, 20B, 20C, and 20D, a primary transfer unit 30, a secondary transfer unit 40, a fixing device 51, a paper transport path 52, a paper feed cassette 53, a manual feed tray 54, and paper discharge. A tray 55 and a control unit 60 are provided. The control unit 60 comprehensively controls each unit of the image forming apparatus 10. Note that the image forming units 20 </ b> A to 20 </ b> D are appropriately referred to as an image forming unit 20.

  The image forming apparatus 10 uses an image data corresponding to four hues of black and cyan, magenta, and yellow, which are three subtractive primary colors obtained by color separation of a color image. The image forming process is performed. In the image forming units 20A to 20D, toner images (developer images) of respective hues are formed. The image forming units 20 </ b> A to 20 </ b> D are arranged in a row in the horizontal direction along the primary transfer unit 30.

  Hereinafter, the image forming unit 20A will be mainly described. The image forming units 20B to 20D are configured substantially in the same manner as the image forming unit 20A. The black image forming unit 20A includes a photosensitive drum 21A, a charging device 22A, an exposure device 23A, a developing device 24A, and a cleaning unit 25A, and forms a black toner image through an electrophotographic image forming process.

  The photosensitive drums 21B, 21C, and 21D respectively provided in the photosensitive drum 21A and the image forming units 20B to 20D rotate in one direction when a driving force is transmitted from a driving motor (not shown). The photosensitive drum 21A is a monochrome image carrier, and the photosensitive drums 21B to 21D are color image carriers.

  The charging device 22A is disposed so as to face the peripheral surface of the photosensitive drum 21A, and charges the peripheral surface of the photosensitive drum 21A to a predetermined potential.

  The exposure device 23A irradiates the peripheral surface of the photosensitive drum 21A with a laser beam modulated by the image data for black. As a result, an electrostatic latent image based on the image data for black is formed on the peripheral surface of the photosensitive drum 21A.

  The developing device 24A contains black toner (developer). The developing device 24A develops the electrostatic latent image into a toner image by supplying toner to the peripheral surface of the photosensitive drum 21A.

  The developing devices 24B to 24D of the image forming units 20B to 20D contain toners of cyan, magenta, and yellow, respectively, and the photosensitive drums 21B to 21D of the image forming units 20B to 20D. A toner image of each hue of cyan, magenta, and yellow is formed.

  The primary transfer unit 30 includes a primary transfer belt 31, a primary transfer driving roller 32, a primary transfer driven roller 33, primary transfer rollers 34 </ b> A to 34 </ b> D, and a primary transfer belt cleaning unit 35.

  The primary transfer belt 31 has an endless belt shape, is stretched around a primary transfer driving roller 32 and a primary transfer driven roller 33, and moves around in a predetermined direction. The outer peripheral surface of the primary transfer belt 31 faces the photosensitive drums 21A to 21D of the image forming units 20A to 20D.

  The primary transfer rollers 34A to 34D are arranged so as to face the photosensitive drums 21A to 21D with the primary transfer belt 31 interposed therebetween. A region where the outer peripheral surface of the primary transfer belt 31 and the photosensitive drums 21A to 21D face each other is a primary transfer region.

  A primary transfer bias is applied to the primary transfer rollers 34 </ b> A to 34 </ b> D by constant voltage control with a toner charging polarity (for example, minus) and a reverse polarity (for example, plus). As a result, the toner images of the respective hues formed on the peripheral surfaces of the photoconductive drums 21 </ b> A to 21 </ b> D are primarily transferred onto the outer peripheral surface of the primary transfer belt 31 in order, and a full-color toner image is formed on the outer peripheral surface of the primary transfer belt 31. It is formed.

  However, when image data of only a part of the hues of yellow, magenta, cyan, and black is input, a part of the four photosensitive drums 21A to 21D corresponding to the hue of the input image data. Only by this, an electrostatic latent image and a toner image are formed. For example, in the monochrome image forming mode, the electrostatic latent image and the toner image are formed only on the photosensitive drum 21A corresponding to the black hue, and only the black toner image is transferred to the outer peripheral surface of the primary transfer belt 31.

  The cleaning unit 25A collects the toner remaining on the peripheral surface of the photosensitive drum 21A after development and primary transfer.

  The secondary transfer unit 40 is configured to be able to contact and separate from the primary transfer driving roller 32 with the primary transfer belt 31 interposed therebetween. The area where the primary transfer belt 31 and the secondary transfer unit 40 are in pressure contact is the secondary transfer area.

  The photosensitive drums 21A to 21D are arranged in the order of the photosensitive drum 21A for black, the photosensitive drum 21B for cyan, the photosensitive drum 21C for magenta, and the photosensitive drum 21D for yellow from the side closer to the secondary transfer region. Has been placed. The toner image carried on the outer peripheral surface of the primary transfer belt 31 is conveyed to the secondary transfer region by the movement of the primary transfer belt 31.

  The paper feed cassette 53 contains paper. On the manual feed tray 54, an irregularly shaped paper or cardboard is placed. The paper transport path 52 is configured to guide the paper fed from the paper feed cassette 53 or the manual feed tray 54 to the paper discharge tray 55 via the secondary transfer area and the fixing device 51.

  A registration roller 56 is disposed in the vicinity of the upstream side of the secondary transfer area in the sheet conveyance direction. The paper fed from the paper feed cassette 53 or the manual feed tray 54 to the paper conveyance path 52 is corrected in its direction by being abutted against the resist roller 56 in a stopped state, and starts to rotate at a predetermined timing. Is supplied to the secondary transfer region. By supplying the sheet to the secondary transfer region, the sheet and the primary transfer belt 31 are in close contact with each other.

  By forming a predetermined secondary transfer electric field in the secondary transfer area, the toner image carried on the primary transfer belt 31 is secondarily transferred to the paper.

  Of the toner carried on the primary transfer belt 31, the toner remaining on the primary transfer belt 31 without being transferred to the paper is collected by the primary transfer belt cleaning unit 35. This prevents color mixing in the next step.

  The fixing device 51 includes a heating roller 511 and a pressure roller 512. The heating roller 511 and the pressure roller 512 are in pressure contact with each other. The fixing device 51 heats and presses the sheet by conveying the sheet while sandwiching the sheet at the nip portion between the heating roller 511 and the pressure roller 512, thereby firmly fixing the toner image on the sheet. The sheet on which the toner image is fixed is discharged onto the discharge tray 55 by the discharge roller pair 57.

  FIG. 2 is a right side view showing the main configuration of the image forming apparatus 10 according to the first embodiment of the present invention. FIG. 3 is a rear view showing the main configuration of the image forming apparatus 10 according to the first embodiment of the present invention.

  The image forming apparatus 10 includes an image forming unit 20, an electric circuit board 120, a rotation support member 130, an exterior cover 140, and a harness 150. The image forming unit 20 corresponds to a functional unit of the present invention. The harness 150 corresponds to the wiring of the present invention. In addition to the image forming unit 20, the functional unit of the present invention corresponds to a power supply unit, a driver unit, a paper feeding / conveying unit, a toner conveying unit, a driving unit, and the like.

  The image forming unit 20 is disposed inside the image forming apparatus 10 and has a drive unit (not shown). The electric circuit board 120 controls the image forming unit 20. The rotation support member 130 is disposed outside the image forming unit 20 and supports the electric circuit board 120. Further, the rotation support member 130 is formed in a rectangular shape having a vertical length 131 shorter than the horizontal length 132, and is centered on a rotation shaft 135 formed on one side in the horizontal direction. It is possible to rotate between a closed position that covers 20 and an open position that exposes the image forming unit 20.

  In the present embodiment, the rotation shaft 135 is formed on one side of the upper end portion of the rotation support member 130 by providing hinges 133 and 134 on one side of the upper end portion of the rotation support member 130. Here, although the length 131 is referred to as the vertical length, the length 131 is the vertical length in a state where the rotation support member 130 is located at the closed position.

  The exterior cover 140 is disposed outside the rotation support member 130. The harness 150 connects the image forming unit 20 and the electric circuit board 120 so as to pass through the rotation shaft 135 side of the rotation support member 130.

  The harness 150 is connected to each of the connector 26 (see FIG. 5) of the image forming unit 20 and the connectors 121, 122, 123 of the electric circuit board 120. In addition, the harness 150 is routed along the rotation shaft 135 and branches from the harness 150 toward the connectors 121 to 123.

  At the time of maintenance, the rotation support member 130 can be rotated to the position (open position) shown in FIG. 5 by rotating in the direction of the arrow 136 about the rotation shaft 135 as shown in FIG.

  In this configuration, since the harness 150 connects the image forming unit 20 and the electric circuit board 120 so as to pass the rotation shaft 135 side of the rotation support member 130, the rotation support member 130 is moved from the closed position. Even if it is rotated to the open position, the harness 150 is not stretched. Therefore, since it is not necessary to route the harness 150 by extra routing, the total extension of the harness 150 can be shortened.

  Further, in this configuration, the rotation support member 130 is formed in a rectangular shape in which the vertical length 131 is shorter than the horizontal length 132 and is centered on the rotation shaft 135 formed on one side in the horizontal direction. Since it rotates, it does not require much space when rotating from the closed position to the open position. Therefore, since the rotation support member 130 can be sufficiently rotated to the open position during maintenance of the image forming apparatus 10, the maintenance workability of the image forming apparatus 10 can be improved.

  The image forming apparatus 10 preferably further includes a stay 160 as shown in FIG. The stay 160 corresponds to the first holding member of the present invention. The stay 160 holds the rotation support member 130 in a state where the rotation support member 130 is located at the open position.

  In this configuration, when the rotation support member 130 is rotated to the open position, the rotation support member 130 is reliably held at the open position by the stay 160, so that the rotation support member 130 is disposed inside the rotation support member 130. The accessibility to the image forming unit 20 is improved, and maintenance can be performed safely.

  Next, a second embodiment of the present invention will be described. In addition, in this embodiment, the description which overlaps with 1st Embodiment is abbreviate | omitted.

  FIG. 7 is a right side view showing the main configuration of the image forming apparatus 10 according to the second embodiment of the present invention.

  In this embodiment, the rotation shaft 137 is formed on one side (one side in the horizontal direction) of the lower end portion of the rotation support member 130 by providing a hinge (not shown) on one side of the lower end portion of the rotation support member 130. ing.

  Then, during the maintenance, the rotation support member 130 can be rotated from the closed position shown in FIG. 7 in the direction of the arrow 138 shown in FIG. 8, and can be rotated to the open position shown in FIG.

  In this configuration, since the harness 150 connects the image forming unit 20 and the electric circuit board 120 so as to pass the rotation shaft 137 side of the rotation support member 130, the rotation support member 130 is moved from the closed position. Even if it is rotated to the open position, the harness 150 is not stretched. Therefore, since it is not necessary to route the harness 150 by extra routing, the total extension of the harness 150 can be shortened.

  Further, in this configuration, the rotation support member 130 is formed in a rectangular shape in which the vertical length 131 is shorter than the horizontal length 132 and is centered on a rotation shaft 137 formed on one side in the horizontal direction. Since it rotates, it does not require much space when rotating from the closed position to the open position. Therefore, since the rotation support member 130 can be sufficiently rotated to the open position during maintenance of the image forming apparatus 10, the maintenance workability of the image forming apparatus 10 can be improved.

  The image forming apparatus 10 preferably further includes a stay 170 as shown in FIG. The stay 170 corresponds to the second holding member of the present invention. The stay 170 holds the rotation support member 130 in a state where the rotation support member 130 is located at the open position.

  In this configuration, when the rotation support member 130 is rotated to the open position, the rotation support member 130 is reliably held at the open position by the stay 170, so that the rotation support member 130 is disposed inside the rotation support member 130. The accessibility to the image forming unit 20 is improved, and maintenance can be performed safely.

  Further, it is possible to prevent the electric circuit board 120 supported by the rotation support member 130 from coming into contact with the ground or the like.

  As shown in FIG. 11, a protrusion 171 may be provided instead of the stay 170. With this configuration, the same effects as when the stay 170 is provided can be obtained.

  Finally, the description of the above-described embodiment is to be considered in all respects as illustrative and not restrictive. The scope of the present invention is shown not by the above embodiments but by the claims. Furthermore, the scope of the present invention is intended to include all modifications within the meaning and scope equivalent to the scope of the claims.

DESCRIPTION OF SYMBOLS 10- Image forming apparatus 20- Image forming unit 120- Electric circuit board 130- Turning support member 135- Turning shaft 137- Turning shaft 140- Exterior cover 150- Harness 160- Stay 170- Stay 171- Projection

Claims (4)

A functional unit disposed inside the electronic device body and having a drive unit;
An electric circuit board for controlling the functional unit;
A rotation support member that is disposed outside the functional unit and supports the electric circuit board, and is formed in a rectangular shape whose vertical length is shorter than the horizontal length, and is formed on one side in the horizontal direction. A rotation support member that can rotate between a closed position that covers the functional unit and an open position that exposes the functional unit, with the rotation axis as a center,
An exterior cover disposed separately from the rotation support member, the exterior cover for exposing the rotation support member to the outside in a state where the rotation support member is in the closed position; ,
An electronic device comprising: a wiring connecting the functional unit and the electric circuit board so as to pass through a rotation shaft side of the rotation support member. The one side in the horizontal direction is one side of the upper end portion of the rotation support member,
The electronic device according to claim 1, further comprising a first holding member that holds the rotation support member in a state where the rotation support member is located at the open position. The one side in the horizontal direction is one side of the lower end of the rotation support member,
The electronic device according to claim 1, further comprising a second holding member that holds the rotation support member in a state where the rotation support member is located at the open position. The functional unit includes an image forming unit,
The electronic device according to claim 1, wherein the electronic device main body performs an image forming operation.

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