JP2002258715A - Wiring method for transmission harness and electronic device using this method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wiring method for transmission harness and an electronic device using this method which reduce the cost of harness and realizes easy wiring in a device structure body. SOLUTION: A primary harness 18 and a secondary harness 19 are separately arranged on the front side and the rear side of the device. The distance between a primary electric wire and a secondary electric wire is secured, thereby obviating a double insulating wire or a tube. Since the primary harness 18 is laid only in a specific place (fixing part), the wiring in the harness is performed more easily by arranging the secondary harness 19, which is wired to individual transmission parts, on the rear side, and each interchangeable unit can be easily attached to and detached from the front side.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image forming apparatus such as a copying machine, a printer, and a facsimile, which receives AC power from a commercial power supply and receives two types of power, a primary power and a secondary power. The present invention relates to an electronic device using the same and a wiring method of a transmission harness thereof.

[0002]

2. Description of the Related Art Conventionally, as a wiring method of a harness for supplying electric power to an electronic device, a primary side electric wire and a secondary side electric wire constituting a harness are wired close to each other or bundled, and a specified distance is set. A method of using double insulated wire or covering with a tube in order to secure it, and laying out the primary and secondary wires that make up the harness inside and outside the device structure and exposing them to the outside A method of attaching a protective cover to protect the harness to be used (Japanese Patent Application Laid-Open No. 60-206197) and the like.

[0003]

However, in the case of the above-described prior art, a double insulated wire is used for the electric wire,
Since the harness is configured by adding a special part such as a tube, there is a problem that the cost of the harness is correspondingly increased.

On the other hand, in the case of the prior art described above, since the harness is divided inside and outside the device structure, a space for arranging the harness outside the structure is required, and special parts such as a protective cover are also required. Become. Therefore, there has been a problem that the structure is complicated and wiring of the harness is not easy.

SUMMARY OF THE INVENTION The present invention has been made to solve such a problem of the prior art, and aims at reducing the cost of a harness and a wiring method of an electric transmission harness which can be easily wired to an apparatus structure, and a method thereof. It is an object to provide an electronic device using a wiring method.

[0006]

SUMMARY OF THE INVENTION According to the wiring harness wiring method of the present invention, a primary harness wired in an electronic device and transmitted to a primary-side power-supplied portion, and a wiring harness wired in the electronic device. A wiring method for wiring a secondary side harness to be transmitted to a secondary side power-supplied portion in the electronic device, wherein the primary side harness and the secondary side harness are provided on opposite sides of the electronic device. The above-described object is achieved.

[0007] An electronic device according to the present invention includes a primary-side power-supplied section that uses primary-side power, a secondary-side power-supplied section that uses secondary-side power, and a primary-side power-supplied section. An electronic device comprising at least a primary side harness for transmitting a secondary side power supply to the secondary side power supply section and a secondary side harness for transmitting secondary side power to the secondary side power supply section. The secondary side harness is wired on opposite side surfaces of the electronic device, thereby achieving the above object.

An image forming paper transport path is provided in the electronic device in a substantially vertical direction along one side surface of the electronic device, and the one side surface of the electronic device moves in a substantially horizontal direction with respect to the device main body. An image forming apparatus configured to open the image forming paper conveyance path, wherein one of two side surfaces adjacent to the one side surface of the electronic device includes the primary side harness and the secondary side harness. One of the side harnesses may be wired, and the other of the primary side harness and the secondary side harness may be wired on the other side of the two sides of the electronic device.

The electronic device is an image forming apparatus in which a replacement unit in the electronic device can be detached from a side surface of the image forming paper transport surface on the electronic device that is orthogonal to a paper transport direction. The harness may be wired on a side surface of the electronic device where the replacement unit is attached / detached, and the secondary harness may be wired on a side surface of the electronic device facing the side where the exchange unit is attached / detached.

[0010] The primary side harness and the secondary side harness are wired on opposite side surfaces of the electronic device, and a power distribution section to which the primary side harness and the secondary side harness are connected, The primary harness and the second harness
Opposite connection portions of the electronic device to which the secondary harness is wired and power distribution portions for secondary power may be arranged on the wired side surface of the secondary harness.

The operation of the present invention will be described below.

In the wiring of the electric harness, it is necessary to secure a specified distance between the electric wires on the primary side and the secondary side according to safety standards. If the specified distance cannot be secured, in the present invention, the distance is secured by separating the primary and secondary wires and, for example, arranging them on the front and rear surfaces of the device. In addition, a double insulated wire or a tube is not required, and cost can be reduced.

Further, since the primary side is wired only to a specific place (fixing portion), the wiring of the harness is further arranged by arranging a secondary side electric wire (electrical harness) to be wired to each electric transmission part on the rear surface. It can be easily performed, and the attachment and detachment of each exchange unit from the front surface is also facilitated.

In the case where the image forming apparatus has a paper transport path extending in a substantially vertical direction along the side face of the apparatus, one of the two side faces adjacent to one side face of the apparatus in which the image transport path extends. Wiring the primary harness on one side and 2 on the other side
When the primary power and the secondary power are transmitted to the primary power supply unit and the secondary power supply unit concentrated on the image forming semi-traveling path by wiring the secondary harness, Even if the transport path is opened, it is difficult for the primary harness and the secondary harness to be exposed on the open transport path side. Furthermore, since the primary side harness and the secondary side harness can be wired separately, the wiring of the harness becomes easy.

Further, the primary side harness having a smaller number of harnesses in the apparatus than the secondary side harness is wired to the side of the apparatus on which the exchange unit in the apparatus is to be attached / detached, and the secondary side having a relatively large number of harnesses. By arranging the harness on the side opposite to the harness, even if the area where the wiring is possible to attach and detach the replacement unit in the apparatus is a narrow side of the apparatus, compared with the case where the secondary side harness with a large number is wired, Wiring work is easily performed due to the wiring margin. In addition, since a relatively large number of secondary side harnesses are wired on the opposite side surface where the replacement unit is not attached and detached and an area for wiring is easy to take, even if the secondary side harness has a large number of wirings, Wiring work is easy due to the clearance.

The primary-side power distribution unit and the secondary-side power distribution unit are arranged such that the primary-side harness and the secondary-side power distribution unit are close to the side surfaces of the device for wiring the primary-side harness and the secondary-side harness, respectively. By arranging the harness between the opposing side surfaces of the device for wiring, the harness does not become unnecessarily long and the wiring work is easily performed.

[0017]

FIG. 1 is a longitudinal sectional view showing the structure of an image forming apparatus as an embodiment of an electronic apparatus according to the present invention. The image forming apparatus is a printer 2, which not only records and outputs an image read by a scanner, but also records and outputs image data from an externally connected device when an image processing apparatus such as a personal computer is connected. Things.

In the printer 2, an electrophotographic processing section centered on a drum-shaped photosensitive member 200 is disposed substantially at the center left of the apparatus main body.

On the lower side of the main body of the printer 2, there is disposed a paper storage and supply section 21 provided inside the main body of the printer 2. The paper supply unit 21 stores the paper stored in the paper storage tray 210 and the paper stored in the paper storage tray 210.
And a separating and supplying unit 211 for separating and supplying sheets one by one. The paper separated and supplied one by one from the paper supply unit 21 is sequentially supplied between the photoconductor 200 of the electrophotographic process unit 20 and the transfer unit, and an image recorded and reproduced on the photoconductor 200 is transferred. . The paper supply to the paper supply unit 21 is performed by pulling out the paper storage tray 210 to the front side of the printer 2.

On the lower surface of the main body of the printer 2, paper sent from a multi-stage paper feed unit or the like prepared as a peripheral device is received, and is directed between the photosensitive member 200 of the electrophotographic process unit 20 and the transfer unit. The paper receiving port 27 for sequentially supplying the paper is provided.

A fixing device 23 is disposed above the electrophotographic process unit 20. The fixing device 23 receives the paper on which the image has been transferred sequentially, heats and fixes the developer transferred to the paper, and moves the fixing device 23 out of the fixing device 23. And send out the paper. The sheet on which the image is recorded is sent from the discharge roller 28 of the printer 2 to the discharge tray 2.
It is discharged to 9.

A control board (process control unit (PCU)) 25 (FIG. 2) for controlling an electrophotographic process and a printer control for accommodating an interface board for accepting image data from the board and the apparatus are provided on the rear surface of the printer 2 body. And an image control unit 24 having an image control unit (ICU) substrate for performing predetermined image processing on image data received from the interface substrate and causing the optical scanning unit 22 to scan and record the image as an image. A power supply unit 26 for supplying power to various substrates and units is disposed.

Next, a wiring method of the harness according to the present embodiment will be described. 2A and 2B are top views of the image forming apparatus (printer 2) of the present embodiment, FIG. 3 is a front perspective view, and FIG. 4 is a rear perspective view.

A heater lamp 23a is provided in the fixing device 23 disposed above the electrophotographic process section 20, and a primary voltage is supplied to the heater lamp 23a. This power supply is performed by a primary-side transmission harness 18 arranged on the front side of the device structure. The primary transmission harness 18 is composed of three electric wires (for supplying power to two heater lamps) connecting the power supply unit 26 and the fixing device 23 disposed inside the device structure.

The printer of this embodiment performs a desired printing operation by operating the above-described various substrates and units (electric devices) in a timely manner. An electric signal for operating each electric device is sent from a process control unit 25 disposed on a rear surface of the printer main body. Therefore, an electronic signal is transmitted and received from the process control unit 25 to each electric device by the secondary-side transmission harness 19 disposed on the rear surface side of the apparatus main body. The secondary side transmission harness 19 is a harness 1 connecting the process control unit 25 and the fixing device 23.
91, a harness 192 connecting the process control unit 25 with the drive unit 30 and the motor 31, a process control unit 25 and the optical scanning unit 22
And a harness 194 connecting the process control unit 25 and the electrophotographic processing unit 20.

Further, charging of the electrophotographic process section 20;
The transfer and peeling processes are performed by the high-pressure discharge harness 17.
Thereby, it is connected to the high voltage substrate 32 from the rear surface via the inside of the drive unit 30.

Here, the primary power supply and the secondary power supply in the present embodiment will be described with reference to FIG. In the image forming apparatus of the present embodiment, a primary-side power source is obtained using an AC plug or the like. The obtained power source is determined via a fuse whether the power source is suitable for the device.
When it is determined that the power can be used, when the switch in the apparatus is turned on, first, the power obtained by removing noise from the obtained power is led to the power supply board. The guided primary power supply includes wiring for a part (fixing heater lamp, light source, etc.) used in the state of the primary power supply, and a part used after AC / DC conversion (motor drive, sensor ON / OFF). , Display unit power supply, etc.) wiring (secondary power supply wiring). At this time, the voltage of the secondary power supply is converted to, for example, 5 V, 12 V, 24 V, or the like by the power of the use site in the power supply board, and the power is supplied to the main body control board and the use site.

As shown in FIG. 1, the image forming apparatus of this embodiment includes an electrophotographic process unit 20 and a fixing device 23.
Are arranged in the vertical direction, and the paper transport path is provided on the left side surface. Electrophotographic process unit 20 and fixing device 23
When a paper jam occurs at the position (1), the jam is released by opening the left side surface (paper transport path) as shown in FIG.
Therefore, to prevent the harness exposed when the paper transport path is opened from being accidentally touched, the opposite side (right side)
The harness from the front or the rear. At this time,
Front side of primary transmission harness 18, secondary transmission harness 1
The power supply unit 26 is arranged inside the apparatus structure so that the fixing switching circuit unit is located on the front side and the AC / DC conversion circuit unit is located on the rear side so that the power supply unit 9 can be easily arranged on the rear side.

Furthermore, the fixing device 23 can be mounted on the apparatus structure by disposing the primary side transmission harness 18 on the front side of the apparatus structure while avoiding the attachment / detachment portion of the exchange unit, and arranging the secondary side transmission harness 19 on the rear side. From the left side, the electrophotographic process unit 20 can be easily attached and detached from the front of the apparatus structure.

[0030]

As described in detail above, according to the present invention,
By separating the primary and secondary wires from each other and arranging them on the front and rear surfaces of the device, the distance is secured, the need for double insulated wires and tubes is eliminated, and the cost can be reduced.

Further, since the primary side is wired only at a specific place (fixing portion), the wiring of the harness can be more easily carried out by arranging the secondary side wire to be connected to each transmission component on the rear surface. This makes it easy to attach and detach each exchange unit from the front.

In the present invention, when the image forming apparatus has a paper conveying path extending substantially vertically along the side of the apparatus, the image forming conveying path is adjacent to one side of the extending apparatus. A primary-side harness is wired to one of the two side surfaces, and a secondary-side harness is wired to the other side. When transmitting the primary-side power and the secondary-side power to the power-supplied portions, respectively, even if the sheet transport path is opened, it is difficult to expose the sheet to the transport path side where the primary-side harness and the secondary-side harness are opened. , Improve safety. Furthermore, since the primary side harness and the secondary side harness can be wired separately, the wiring of the harness becomes easy.

Further, the primary side harness, which has a smaller number of harnesses in the apparatus than the secondary side harness, is wired to the side of the apparatus where the replacement unit in the apparatus is to be attached and detached, and the secondary side which has a relatively large number of harnesses. By arranging the harness on the side opposite to the harness, even if the area where the wiring is possible to attach and detach the replacement unit in the apparatus is a narrow side of the apparatus, compared with the case where the secondary side harness with a large number is wired, Wiring becomes easy, and wiring work becomes easy. In addition, since a relatively large number of secondary side harnesses are wired on the opposite side surface where the replacement unit is not attached and detached and an area for wiring is easy to take, even if the secondary side harness has a large number of wirings, The wiring work is easy to perform because of the clearance.

The primary side power distribution unit and the secondary side power distribution unit are connected to the primary side harness and the secondary side harness so as to be close to the side surface of the device for wiring the primary side harness and the secondary side harness, respectively. By arranging the harness between the opposing side surfaces of the device for wiring, the harness does not become unnecessarily long and the wiring work becomes easier.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view illustrating a configuration of an image forming apparatus according to an embodiment of the invention.

FIGS. 2A and 2B are top views each showing a configuration of the image forming apparatus of FIG. 1;

FIG. 3 is a front perspective view illustrating a configuration of the image forming apparatus of FIG. 1;

FIG. 4 is a rear perspective view illustrating a configuration of the image forming apparatus of FIG. 1;

FIG. 5 is a longitudinal sectional view showing a state where the image forming apparatus of FIG. 1 is opened.

FIG. 6 is a diagram for describing a primary-side power supply and a secondary-side power supply according to the present invention.

[Explanation of symbols]

 2 Printer 17 High-voltage discharge harness 18 Primary transmission harness 19 Secondary transmission harness 20 Electrophotographic process unit 21 Paper supply unit 22 Optical scanning unit 23 Fixing device 23a Heater lamp 24 Image control unit 25 Process control unit 26 Power supply unit 27 Paper Receiving port 28 Discharge roller 29 Discharge tray 30 Drive unit 31 Motor 32 High voltage substrate 191 Harness 192 Harness 193 Harness 194 Harness 200 Photoconductor 210 Paper storage tray 211 Separation and supply unit

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Yama ▲ Saki ▼ Shinichi 22-22 Nagaikecho, Abeno-ku, Osaka-shi, Osaka Inside Sharp Corporation (72) Inventor Masao Miyaza 22nd Nagaike-cho, Abeno-ku, Osaka-shi, Osaka No. 22 Inside Sharp Corporation (72) Inventor Hidenori Atsumi 22-22 Nagaikecho, Abeno-ku, Osaka City, Osaka Prefecture Inside Sharp Corporation (72) Masanori Nakazawa 22-22 Nagaikecho, Abeno-ku, Osaka City, Osaka Prefecture 2C061 AP03 AP04 AQ06 CG03 CG12 2H071 DA34 EA04 EA08 5G363 AA08 AA16 BA02 DC08

Claims (5)

[Claims] 1. A primary harness wired in an electronic device and transmitted to a primary power supplied portion, and a secondary harness wired in the electronic device and transmitted to a secondary power supplied portion. A wiring method for wiring the electronic harness, wherein the primary side harness and the secondary side harness are wired on side surfaces of the electronic device facing each other. 2. A primary power supplied section using primary power, a secondary power supplied section using secondary power, and a primary power supplied section using primary power. An electronic device comprising at least a primary side harness for transmitting power to the secondary side and a secondary side harness for transmitting secondary side power to the secondary power supplied portion, wherein the primary side harness and the secondary side harness An electronic device, which is wired on side surfaces of the electronic device facing each other. 3. An image forming paper conveyance path is provided in the electronic device in a substantially vertical direction along one side surface of the electronic device.
An image forming apparatus configured to move the one side surface of the electronic device in a substantially horizontal direction with respect to the device main body to open the image forming paper conveyance path, and to be adjacent to the one side surface of the electronic device. One of the primary side harness and the secondary side harness is wired to one side of the two sides, and the primary side harness and the second side are connected to the other side of the two sides of the electronic device. 3. The electronic device according to claim 2, wherein the other of the secondary side harness is wired. 4. The image forming apparatus according to claim 1, wherein the electronic device is configured such that a replacement unit in the electronic device can be attached to and detached from a side surface of the image forming paper transport surface on the electronic device that is orthogonal to a paper transport direction. The secondary harness is wired on a side surface of the electronic device where the replacement unit is attached and detached, and the secondary harness is wired on a side surface opposite to the side surface of the electronic device where the exchange unit is attached and detached. The electronic device according to claim 2 or 3, wherein 5. The power distribution unit, wherein the primary side harness and the secondary side harness are wired on side surfaces of the electronic device facing each other, and the primary side harness and the secondary side harness are connected. Is disposed between opposing side surfaces of the electronic device on which the primary side harness and the secondary side harness are wired, and a connection between the power distribution unit and the primary side harness and a primary side power supply. A power distribution unit is disposed on the side of the primary harness where the wiring is wired, and a connection portion of the power distribution unit with the secondary harness and a power distribution unit for secondary power are wired with the secondary harness. The electronic device according to claim 2, wherein the electronic device is disposed on a side surface of the electronic device.