JP3158949B2 - Facsimile machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a facsimile apparatus, and more particularly, to a layout structure of a circuit board.

[0002]

2. Description of the Related Art In general, a facsimile apparatus is a multifunctional apparatus having an image reading function, an image communication function, and an image printing function, and is a mechanical / electric combined apparatus in which a mechanical configuration and an electrical configuration are combined. is there. For example, the image reading function unit is configured by combining an image reading element such as a document feeding mechanism or a CCD, or a document sensor or the like. The image communication function unit is mainly configured by an electronic circuit. The image printing function unit is configured to print image information on recording paper by a thermal method using a thermal head or an electrophotographic method using a laser scanner, and in this case also, a mechanical configuration such as a recording paper transport mechanism is combined. . The electrical configuration includes a power supply unit for converting an AC commercial power supply to a DC power supply having a predetermined voltage, a network control unit (NCU) for establishing a line with a partner facsimile machine, and control of the entire facsimile machine. Which are usually configured as a power supply board, an NCU board, and a control board.

The control board is connected to operation input signal lines from a keyboard of an operation panel, sensor input signal lines from various sensors, image data input signal lines from an image reading element, and the like. From the control board, a control output line to a motor for driving a document feeding mechanism and a recording paper transport mechanism, a display output signal line to a display of an operation panel, and an image data output signal line to a thermal head and a laser scanner. And control signal lines are connected.

[0004] The control board and the NCU board are connected by various signal lines for exchanging transmission image signals and reception image signals. From the power supply board, a cable is extended to supply DC power of a required voltage to a required location.

In a conventional facsimile apparatus, the effective arrangement of the power supply board, the NCU board, and the control board, which governs the electrical configuration, inside the facsimile apparatus has not been taken into consideration comprehensively. It was only set up separately in a separate place.

[0006]

However, in the conventional facsimile apparatus, even the electrical connection between the power supply board, the NCU board, and the control board must be made using a cable, and this cable picks up noise. There has been a problem that image data failure or communication failure may occur. Also, the large number of cables hindered cost reduction. Furthermore, the cable connection between the boards or the cable connection from the board to various parts of the apparatus is very complicated, and the assembling workability is very poor.

The present invention has been conceived in order to solve the above-mentioned conventional problems. In view of the mechanical arrangement of various substrates for controlling the electrical configuration of a facsimile apparatus, noise reduction and parts reduction are required. It is an object of the present invention to provide a new facsimile apparatus which can reduce the number of points, improve assembling workability, and further promote downsizing of the apparatus.

[0008]

According to a first aspect of the present invention, there is provided a facsimile apparatus in which a document reading mechanism and a printing mechanism are arranged in a main body cover, and an AC commercial power supply is supplied with a predetermined voltage. A facsimile apparatus comprising: a power supply section for converting to a DC power supply; a network control section for performing network control such as establishment of a line with a partner facsimile apparatus; and a control section for controlling the entire apparatus. On the other hand, the power supply unit, the network control unit and the control unit are mounted on a plurality of boards, and each board is connected to each other by a connector. It is fixed on the bottom plate attached to the bottom.

A facsimile apparatus according to a second aspect of the present invention is the facsimile apparatus according to the first aspect of the present invention, wherein the plurality of substrates include a power supply board on which the power supply unit is mounted, and the network control unit. It comprises a network control board to be mounted and a control board to mount the control unit.

Further, a facsimile apparatus according to a third aspect of the present invention is the facsimile apparatus according to the first or second aspect, wherein at least one of the plurality of substrates is horizontally arranged. It is fixed, and the remaining substrate is fixed vertically.

A facsimile apparatus according to a fourth aspect of the present invention is the facsimile apparatus according to the third aspect of the present invention, wherein a sheet feed cassette is provided at a bottom of the main body cover, and Is fixed to a region of the bottom plate that is not occupied by the sheet cassette.

A facsimile apparatus according to a fifth aspect of the present invention is the facsimile apparatus according to the first aspect of the present invention, wherein the plurality of substrates include a power supply substrate on which the power supply unit is mounted, and a network control unit. It consists of three boards: a network control board to be mounted, and a control board to mount the control unit.
Two of the boards are arranged horizontally adjacent to each other, while the other board is arranged vertically, and this vertical board is connected to the horizontal board via a connector inserted vertically. Is connected to both of the two substrates.

[0013]

In the facsimile apparatus according to the first aspect of the present invention, a plurality of substrates are mounted on the bottom plate in an interconnected state by connectors, and the bottom plate on which each substrate is mounted is mounted on the bottom surface of the main body cover. By being attached, the electrical components are assembled.

Further, in the facsimile apparatus according to the second aspect of the present invention, the three boards of the power supply board, the network control board, and the control board are installed on the bottom plate in an interconnected state by the connector, and thus each board is installed. The electrical component is assembled by attaching the bottom plate to the bottom surface of the main body cover.

Further, in the facsimile apparatus of the invention according to claim 3, at least one of the plurality of substrates is provided.
The substrates are fixed horizontally, and the remaining substrates are fixed vertically. Also in this case, each board is installed on the bottom plate in an interconnected state by a connector. Therefore, the area occupied by the plurality of substrates on the bottom plate is reduced, and the electrical components can be assembled efficiently in a planar space.

In the facsimile apparatus according to the fourth aspect of the present invention, the plurality of substrates are fixed in a region of the bottom plate which is not occupied by the sheet cassette.
Each board is connected directly by a connector, so the plane occupied space can be reduced, and the electrical components can be effectively arranged using the space that can be called dead space on the board. it can.

Further, in the facsimile apparatus according to the fifth aspect of the present invention, the three boards of the power supply board, the network control board, and the control board are interconnected via the vertical board. Since it is not necessary to connect the two horizontal boards by a connector, these two boards may be simply fixed on the bottom plate, and a complicated operation involving the horizontal movement of the boards is not required. Thus, the connection of the vertical boards only needs to be inserted vertically into the connectors of the two horizontal boards already installed.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the facsimile apparatus of the present invention will be specifically described below with reference to the drawings.

FIG. 1 is a central longitudinal sectional view of an example of the facsimile apparatus 10. First, an outline of the overall structure of the facsimile machine 10 will be described. An original reading mechanism 12 is disposed at an inner front portion (left portion in FIG. 1) of the main body upper cover 11a, and a printing mechanism 13 is disposed at a rear portion (right portion in FIG. 1). I have. A paper feed cassette 14 inserted from the front is disposed at a front portion of the main body lower cover 11b. A plurality of substrates 15, 16, and 17 are provided below the main body lower cover 11 b in a region further behind the paper feed cassette 14.
The electrical component 18 is disposed. And
An operation panel 19 is provided at the front of the upper surface of the main body upper cover 11a.
Is arranged.

The document reading mechanism 12 includes a cover 1 on the main body.
Documents set on a document table 20 formed on the upper portion of the document 1a are pulled in one by one by a separation roller 21, and while they are fed by feed rollers 22, 22, the image on the lower surface is read line by line and discharged. The paper is discharged by the paper rollers 23,23. The feed roller 22 and the discharge roller 2
3, a transparent document support plate 24 is provided, and reflected light from a document surface of light emitted from a light source 25 such as an LED array is reflected by a plurality of mirrors 26, 27, 28 and a lens 29. Is condensed on a reading element 30 such as a CCD. The separation roller 21, the feed roller 22, and the paper discharge roller 23 are controlled and driven by a step motor 31 as a drive source via a gear train or a belt transmission mechanism (not shown).

On the other hand, in the printing mechanism 13, the recording paper 34a drawn inward from the paper feed cassette 14 is fed in a U-turn shape by the recording paper transport mechanism 32, and
The printing is performed by the thermal transfer method while returning to the upper surface of the cover 14a. The recording paper transport mechanism 32 is rotated in contact with the upper surface of the recording paper laminate 34 pressed upward by the spring 33 to rotate and draw the uppermost recording paper 34a to the back. The feed rollers 36, 36 which rotate so as to sandwich the recording paper 34a and feed the recording paper 34a further to the back, a guide wall 37 for guiding the recording paper 34a thus fed to make a U-turn, and the thermal head 3
Platen 3 for backing up recording paper 34a for 8
9, a guide wall 40 for further guiding the front portion of the printed recording paper 34a, and a discharge roller 4 for discharging the printed recording paper 34a onto the lid 14a of the paper feed cassette 14.
1 is provided.

The thermal head 38 includes an ink ribbon 42
Is urged toward the platen 39 by a spring 43. Further, the ink ribbon 42 includes a supply roll 44.
a and a ribbon cassette 44 having a take-up roll 44b
Is loaded inside. The rollers 35 and 41 and the platen 39 in the recording paper transport mechanism 32 and the take-up roll 44b in the ribbon cassette 44 are controlled in a predetermined manner by using the step motor 31 as a drive source and a power transmission mechanism (not shown).・ It is driven.

The main body upper cover 11a is
The main body lower cover 11b has a bottom open shape having an opening 45 on the bottom surface.
Both b are formed by a resin molding. This opening 45
Is closed by a bottom plate 46 made of, for example, a sheet metal. In the embodiment shown in FIG.
In a region deeper than 4, a vertical partition 47, a step-like intermediate ceiling wall 48, a vertical depth wall 49, and a lower open box-shaped space 51 surrounded by left and right side walls 50 are formed. In this box-shaped space 51, a plurality of substrates 15, 16, 17 fixed on the bottom plate 46 are arranged.

As shown in FIG. 2, in this embodiment, commercial A
A power supply board 15 having a function of converting a C power supply into a DC power supply having a predetermined voltage, a network control board (NCU board) 16 having a network control function such as establishment of a line with a partner facsimile machine, A control board 17 having a control function for the entire facsimile apparatus is provided. And the control board 1
The power supply board 7 and the power supply board 15 are horizontally mounted on the bottom plate 46 by using mounting screws 52 or the like so as to be adjacent to each other in the apparatus width direction. An upward connector 53,
54 are provided, and the connectors 53 and 5 are provided.
4, a vertical NCU substrate 16 is directly inserted and connected. The upper portion of the NCU substrate 16 is fixed to the upright portion 46a which is bent upright along the back wall 49 of the box-shaped space 51 by using a mounting screw 55 or the like.

As can be seen from the above, the three substrates 15, 16 and 17 are themselves fixed to the bottom plate 46. Therefore, the substrates 15, 1 are attached to the bottom plate 46.
The bottom plate 46 is attached to the main body lower cover
b can be carried out with good workability before being attached to the bottom surface of the bottom plate 46b.
Is attached to the bottom surface of the main body lower cover 11b,
Assembly of the electrical components of the facsimile machine is completed.

Further, since a part of the plurality of substrates 15, 16, 17 is arranged horizontally and the other is arranged vertically, the space occupied by the combined substrate is reduced, and the facsimile apparatus is used. Can be reduced in size.

Further, in this embodiment, the two horizontal boards are not connected to each other by the connector, and the horizontal boards 1 are not connected.
By vertically inserting and connecting the vertical board 16 to the connectors 53 and 54 provided upwardly on the connectors 5 and 17, electrical connection of the three boards is performed using the vertical board 16 as a medium. Like that. Therefore, the work of installing the horizontal substrates 15, 16, 17 on the bottom plate 46 can be easily performed.
Is further simplified.

Of course, the scope of the present invention is not limited to the embodiments described above. In the embodiment, three boards are connected by a connector.
The number of substrates may be any number. In the embodiment, a part of the plurality of substrates is arranged vertically, but all the substrates may be arranged horizontally.

[0029]

As described above in detail, according to the facsimile apparatus of the first aspect of the present invention, a plurality of substrates are placed on the bottom plate in an interconnected state by connectors, and the bottom plate on which each substrate is placed is thus provided. Is attached to the bottom surface of the main body cover, the assembling of the electrical components of the facsimile apparatus is completed, and the assembling workability is significantly improved. Also, cables are not required for connection between boards,
The number of parts decreases accordingly. Furthermore, since no cable is interposed between the boards, noise interference is reduced, and the performance as a facsimile apparatus can be improved.

Further, according to the facsimile apparatus of the second aspect of the present invention, since the network control board and the control board are directly interconnected by the connector, the transmission image data signal or the earthquake image data signal has noise. Is suppressed as much as possible, and the performance of the facsimile apparatus is further enhanced.

Further, according to the facsimile apparatus of the third aspect of the present invention, since a part of the plurality of substrates is vertical, the area occupied by the combined body of the plurality of substrates on the bottom plate is reduced. As a result, the size of the device can be further reduced.

According to the facsimile apparatus of the fourth aspect of the present invention, the area not occupied by the sheet feeding cassette in the bottom plate, in combination with the fact that the planar space of the connecting body of each substrate is reduced as described above, That is, the electrical components of the apparatus can be effectively arranged by utilizing a narrow space which can be called a dead space, which also greatly contributes to downsizing of the facsimile apparatus.

According to the facsimile apparatus of the fifth aspect of the present invention, there is no need to connect the two horizontal substrates by a connector, so that the two horizontal substrates are simply placed on the bottom plate. Stopping, and then inserting the horizontal board from above into the connector of the two horizontal boards, the three boards can be fixed on the bottom plate in an interconnected state, The work of mounting the substrate is further simplified. This also leads to a reduction in the cost of the facsimile machine.

[Brief description of the drawings]

FIG. 1 is a central longitudinal sectional view of an embodiment of a facsimile apparatus according to the present invention.

FIG. 2 is a view taken in the direction of arrows II-II in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Facsimile apparatus 11a Upper cover of main body 11b Lower cover of main body 12 Document reading mechanism 13 Printing mechanism 14 Paper feed cassette 15 Board (power supply board) 16 Board (NCU board) 17 Board (control board) 18 Electrical component 45 Opening 46 Bottom board 53 connector 54 connector

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-2-87763 (JP, A) JP-A-4-259160 (JP, A) JP-A-7-23153 (JP, A) JP-A-4- 35151 (JP, A) Japanese Utility Model Showa 60-183485 (JP, U) Japanese Utility Model Application No. 3-104970 (JP, U) Japanese Utility Model Application No. 4-10051 (JP, U) (58) Fields surveyed (Int. ⁷ , DB name) H04N 1/00-1/00 108

Claims (5)

(57) [Claims] 1. A document reading mechanism and a printing mechanism are arranged in a main body cover, a power supply section for converting AC commercial power to DC power of a predetermined voltage, and network control such as establishment of a line with a partner facsimile apparatus. A facsimile apparatus including a network control unit for performing the control, and a control unit for controlling the entire apparatus, wherein the main body cover is provided with an opening on the bottom surface, while the power supply unit, the network control unit and a plurality of control units A facsimile apparatus, wherein each of the substrates is fixed on a bottom plate attached to a bottom surface of the main body cover in a state of interconnection by a connector. 2. The method according to claim 1, wherein the plurality of substrates are a power supply substrate on which the power supply unit is mounted, a network control substrate on which the network control unit is mounted, and a control substrate on which the control unit is mounted. Facsimile machine. 3. At least one of said plurality of substrates
3. The facsimile apparatus according to claim 1, wherein one of the substrates is fixed horizontally and the remaining substrates are fixed vertically. 4. A paper feed cassette is provided at a bottom portion of the main body cover, and the plurality of substrates are fixed to an area of the bottom plate not occupied by the paper feed cassette. A facsimile apparatus according to claim 1. 5. The plurality of substrates include a power supply substrate on which the power supply unit is mounted, a network control substrate on which the network control unit is mounted, and a control substrate on which the control unit is mounted. , Two of which are arranged horizontally adjacent to each other, while the other one is arranged vertically, and this vertical board is connected via a vertically inserted connector. Connected to both of the two horizontal substrates,
The facsimile apparatus according to claim 1 .