JP2013218303A - Wiring device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To achieve a wiring device whose maintainability is favorable.SOLUTION: An opening is formed on a side surface of a main body. An opening/closing panel covers the opening. In the opening, a circuit board is disposed on which a circuit for controlling a functional part in the main body is configured. A slit is formed in the circuit board and in the peripheral part of the slit, circuit patterns for transmitting control signals from the circuit board to the functional part are collected as a connecting part. Connectors are connected to the connecting part. Connectors and the functional part are connected via a harness. Connectors are adapted to be connected with the slits of the circuit board, allowing the position of the connector to be checked without detaching the circuit board.

Description

  Embodiments described herein relate generally to a wiring device used in an image forming apparatus or the like.

  Conventionally, a circuit board wiring device used in an image forming apparatus is attached to an internal frame or the like in a state of facing a side panel or a back panel of a main body, and is electrically connected to other functions using a harness. A connection is being made. The circuit board is attached with the electronic component mounted side facing inward and the soldered surface facing the side panel or the back panel. The harness is connected to a connector mounted on the side of the circuit board on which electronic components are mounted.

  However, the location of the connector attached to the inner circuit board surface could not be confirmed with the side panel and the rear panel removed. For this reason, the connector cannot be confirmed unless the fixing means such as screws for attaching the circuit board is removed.

JP 2008-3354 A

  The problem to be solved by the present invention is to provide a wiring device with good maintainability.

  The wiring device according to the embodiment includes a main body, an opening formed in a side surface or a back panel of the main body, an open / close panel that covers the opening, and a position in the opening that is attached to the main body. A circuit board on which a circuit for controlling a part is configured, a relief means formed inside the circuit board, and a circuit for sending a control signal from the circuit board to the functional part around the escape means A connection unit that collects patterns, a harness that has one end connected to the functional unit, and a connector that connects the other end of the harness and connects to the connection unit are provided.

It is a typical block diagram for demonstrating 1st Embodiment concerning a wiring apparatus. It is a rear view of FIG. It is a perspective view which shows the state which looked at FIG. 1 from the back side. 3 is a perspective view of the main part. 4 is an enlarged perspective view of the main part. It is a perspective view equivalent to FIG. 4 for demonstrating 2nd Embodiment concerning a wiring apparatus. It is a typical block diagram for demonstrating 3rd Embodiment concerning a wiring apparatus. It is a conceptual block diagram for demonstrating the structural example of the principal part mounted in a circuit board. It is a figure for demonstrating the modification of the one part structure concerning a wiring apparatus. It is a figure for demonstrating the modification of the one part structure concerning a wiring apparatus.

  Hereinafter, embodiments will be described in detail with reference to the drawings.

(First embodiment)
FIG. 1 is a front view showing a first embodiment relating to a wiring device. FIG. 2 is a rear view of FIG. FIG. 3 is a perspective view seen from the back side.

  FIG. 1 shows an example of an image forming apparatus provided with a wiring device. The image forming apparatus 100 is, for example, an MFP (Multi-Function Peripheral) that is a digital multifunction peripheral, a printer, a copier, or the like.

  There is a document table on the upper part of the main body 11 of the image forming apparatus 100, and an automatic document feeder 12 is provided on the document table so as to be freely opened and closed. A control panel 13 is provided on the upper portion of the main body 11. The control panel 13 includes an operation unit 131 having various keys and a touch panel type display unit 132.

  The main body 11 has functional units of a scanner unit 16 and a printer unit 17, and a plurality of cassettes 18 in which various sizes of paper are accommodated are provided at the lower part of the main body 11. The scanner unit 16 reads a document sent by the automatic document feeder 12 or a document placed on a document table.

  The printer unit 17 includes a photosensitive drum and a laser, and scans and exposes the surface of the photosensitive drum with a laser beam from the laser to create an electrostatic latent image on the photosensitive drum. A charging device, a developing device, a transfer device, and the like are disposed around the photosensitive drum, and the electrostatic latent image on the photosensitive drum is developed by the developing device to form a toner image on the photosensitive drum. The toner image is transferred onto a sheet by a transfer device. The configuration of the printer unit 17 is not limited to the example described above, and there are various methods.

  As shown in FIGS. 2 and 3, a circuit board 19 for controlling functional units such as the scanner unit 16 and the printer unit 17 is disposed on the back surface of the main body 11. The circuit board 19 is attached to the frame or the like with a plurality of screws 191 in a state where the maintenance opening 20 opened on the back surface of the main body 11 is positioned. The opening 20 has the same area as the circuit board 19. The circuit board 19 can be taken in and out through the opening 20.

  The opening 20 can be closed by the open / close panel 21. The open / close panel 21 opens the open / close panel 21 for maintenance, for example, so that the circuit board 19 can be inspected. On the lower side of the open / close panel 21, a locking claw 201 integrally formed on the lower side is locked in a locking hole formed in the back panel 111 of the main body 11. The upper side of the openable / closable panel 21 passes through the upper side and is screwed into a screw hole 112 formed in a frame or the like in the main body 11 through a notch 192 formed in the circuit board 19. . The open / close panel 21 can be removed from the main body 11 by removing the screw 202 from the screw hole and removing the claw 201 from the locking hole. The open / close panel 21 can be opened and closed with the claw 201 being locked in the locking hole, that is, by the same action as the hinge.

  The circuit board 19 is a so-called single-sided board including a mounting surface 193 on which electronic components are attached and a connection surface 195 on which a wiring pattern 194 (FIG. 5) is formed. The mounting surface 193 is attached to the inside of the main body 11, and the connection surface 195 is attached so as to face the opening / closing panel 21.

  A notch 196 is provided on one side of the circuit board 19. As shown in FIG. 5, wiring patterns 194 for connecting the circuit board 19 and other functions are concentrated in the cut portions 196 to form connection portions 1941 and 1942.

  A detachable connector 221 is connected to the connection portion 1941. One end of the harness 231 is electrically connected to the connector 221. The other end of the harness 231 is connected to, for example, the scanner unit 16 that needs to be connected to the connection unit 1941 of the circuit board 19. Thereby, the scanner unit 16 and the connection unit 1941 are electrically connected via the connector 221 and the harness 231.

  A detachable connector 222 is connected to the connection portion 1942. One end of a harness 232 is electrically connected to the connector 222. The other end of the harness 231 is connected to, for example, the printer unit 17 that needs to be connected to the connection unit 1942 of the circuit board 19. Accordingly, the printer unit 17 and the connection unit 1942 are electrically connected via the connector 222 and the harness 232.

  The connectors 221 and 222 are connected at the position of a notch 196 formed in the circuit board 19 as escape means. For this reason, the circuit board 19 can confirm the positions of the connectors 221 and 222 even when the circuit board 19 is attached to the main body 11 with the screws 191.

  When removing the circuit board 19, the harnesses 222 and 223 do not interfere with the work by removing the connectors 221 and 222 in advance and then removing the screw 191. For this reason, the workability of removing the circuit board 19 is improved, and as a result, the maintainability is improved.

  In this embodiment, it becomes easy to remove the circuit board attached to the main body, which contributes to improvement in workability when removing the circuit board for maintenance or the like.

(Second Embodiment)
FIG. 6 is a perspective view corresponding to FIG. 4 for explaining the second embodiment of the wiring device. The same components as those in the first embodiment are denoted by the same reference numerals, and description of overlapping portions is omitted. The same applies to the following embodiments.

  In this embodiment, the connectors 221 and 222 are connected at a position on the center side of the circuit board 19. A rectangular connection port 61 as a escape means is formed on the center side of the circuit board 19. Connection portions 1941 and 1942 are formed on one side of the connection port 61. The connector 221 is connected to the connection portion 1941. The connector 222 is connected to the connection portion 1942.

  In this embodiment, the degree of freedom of the connection positions of the connectors 221 and 222 is improved, and thus the degree of freedom of design is improved. Further, as compared with the case where the circuit board 19 is connected to the end face, the connection positions of the connectors 221 and 222 become easier to understand because the back panel does not get in the way.

(Third embodiment)
A third embodiment of the wiring device will be described with reference to FIGS. FIG. 7 is a schematic perspective view. FIG. 8 is a conceptual configuration diagram for explaining a configuration example of a main part mounted on a circuit board.

  In this embodiment, the connection between the connectors 221 and 222 and the detachable inspection connector 71 in the first embodiment is replaced while the circuit board 19 is attached to the frame in the main body 11 with the screws 191. The connection location of the connector 71 shares the connection portions 1941 and 1942 of the circuit board 19 to which the connectors 221 and 222 of the first embodiment are connected.

  The other end of the harness 72 whose one end is electrically connected to the connector 71 is connected to, for example, a PC (Personal Computer) 73 in which application software is installed, which can inspect the circuit of the circuit board 19.

  FIG. 8 shows only the integrated circuit 80 in which a function for testing whether the circuit board 19 operates effectively based on the operation of the PC 73 is included in the circuit configuration mounted on the circuit board 19.

  As shown in FIG. 8, the integrated circuit 80 includes a CPU (Central Processing Unit) 81, a nonvolatile memory 82, a timer circuit 83, an analog-digital conversion circuit 84, an internal data bus 85, and a test interface 86. Have. The test interface 86 is connected to the connector 71.

  The CPU 81, the nonvolatile memory 82, the timer circuit 83, and the analog / digital conversion circuit 84 share the internal data bus 105, and transmit and receive information such as data.

  The timer circuit 83 has a timer function and performs a timer operation according to the input clock signal.

  The analog-digital conversion circuit 84 is formed with a circuit having an analog-digital conversion function, and outputs a digital signal corresponding to an input analog signal.

  The integrated circuit 80 is connected to the PC 73 for inspecting the external integrated circuit 80 via the test interface 106, the connector 71, and the harness 72. The PC 73 was in a program with respect to the timer circuit 83 through the harness 72, the connector 71, and the test interface 106 with respect to the operation test that was in the program under a plurality of conditions and the analog-digital conversion circuit 83 under the plurality of conditions. Perform an operation test. Then, the result of each operation test is written in the nonvolatile memory 82 and displayed on the display of the PC 73.

  The result of the operation test written in the nonvolatile memory 82 can be used for subsequent maintenance by storing it as a history, for example. The operation test result displayed on the display may represent the operation confirmation items as a table in advance, and display pass / fail for each item.

  As described above, the connectors 221 and 222 connected to the scanner unit 16 and the printer unit 17 are connected to the connection units 1941 and 1942 of the circuit board 19 when used as the normal image forming apparatus 100. When connecting the PC 73 as a tester from the outside for maintenance or the like, a connector 71 other than the connectors 221 and 222 can be connected. For this reason, the connector 71 can be connected without removing the screw 191 attached to the circuit board 19.

  The connector 71 may be divided like the connectors 221 and 222. However, the use of the connector 71 that can be connected to the connecting portions 1941 and 1942 at a time leads to improvement in maintainability.

  In this embodiment, it is possible to connect a PC serving as a circuit board tester without removing the circuit board, and to improve maintenance.

  In each of the embodiments described above, in the connector 71, the connection location of the connector 221 and the connection portion 1941, and the connection location of the connector 222 and the connection portion 1942 do not necessarily match. FIG. 9 shows a modification thereof. That is, the conductor 72a of the harness 72 is connected to the wiring pattern 194, but the conductor 72b is not connected. Eliminating the cause of connection failure by eliminating unnecessary connection parts for the operation test helps.

  In addition, the notch 198 for the connector 71 may be formed separately from the notch 196 for the connectors 221 and 222. FIG. 10 shows a modification thereof. That is, the wiring pattern 197 necessary for the operation inspection for connecting the connector 71 is formed around the notch 198. As a result, the operation inspection can be performed without removing the circuit board 19 with the connectors 221 and 222 connected to the functional units of the image forming apparatus 100 intact.

  Further, the connectors 221 and 222 may be integrated. When an integrated connector is used, separate harnesses may be wired from a common connector to each functional unit, or one end of the harness connected to the connector may be integrated and the other end may be appropriately separated and used. .

  Although several embodiments have been described, these embodiments have been presented by way of example and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, combinations, and changes can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

DESCRIPTION OF SYMBOLS 100 Image forming apparatus 11 Main body 111 Rear panel 12 Automatic document feeder 13 Control panel 16 Scanner part 17 Printer part 18 Cassette 19 Circuit board 193 Mounting surface 194, 197 Wiring pattern 1941, 1942 Connection part 195 Connection surface 196, 198 Cut part 191 , 202 Screw 20 Opening 21 Open / close panels 221, 222, 71 Connectors 231, 232, 72 Harness 61 Connection port 73 PC

Claims (5)

The body,
An opening formed in the side or back panel of the body;
An open / close panel covering the opening;
A circuit board on which a circuit for controlling a functional unit in the main body is configured by being positioned in the opening and attached in the main body,
Escape means formed inside the circuit board;
Around the escape means, a connection part that collects circuit patterns for sending control signals from the circuit board to the function part, and
A harness having one end connected to the functional unit;
A wiring device including the other end of the harness and a connector connected to the connection portion.   The wiring device according to claim 1, wherein the escape means is formed in the circuit board by a cut portion or a connection port.   The wiring device according to claim 1, wherein the connector is replaceable with an inspection connector to which a tester for inspection of the circuit board is connected in a state where the circuit board is attached.   The wiring device according to any one of claims 1 to 3, wherein the number of the connectors for inspection is made different when the plurality of connectors are connected to the connection portion.   5. The wiring device according to claim 1, wherein the escape means of the inspection connector is formed separately from the escape means to which the connector is connected.

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