JPH02260866A - Picture forming device - Google Patents

Abstract

PURPOSE:To eliminate the need for the consideration as to harness processing and to facilitate countermeasures against the electromagnetic wave disturbance by constituting major functions on one printed circuit board and arranging the printed circuit board to the upper space of the device. CONSTITUTION:A switch 2 to receive an input of an operation panel, a CPU 3 for system control, a coil 4 for a network control unit NCU or the like are arranged on a printed circuit board 1 and function sections are interconnected by the print pattern. Then an outer cover 5 is provided to include the operation panel and to cover the upper part of the device and a cover 8 to separate the lower part of the printed circuit board 1 and the lower part of the device is arranged to the lower part of the printed circuit board 1 and the upper unit is constituted to insert the printed circuit board 1 between the outer cover 5 and the unit. Thus, the consideration relating to the harness processing is eliminated and the countermeasures against electromagnetic wave disturbance are facilitated.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a device configuration arrangement in an image forming apparatus, such as a facsimile machine.

[Prior Art] The conventional technology of this type of image forming apparatus will be explained using a facsimile as an example.

FIG. 4 shows a cross section of a main part of an example of a conventional facsimile. A document 102 placed on a document table 100 is conveyed from the left to the right in the figure by the action of each roller 103, 104, 105, and 106 of the document conveying means.

Light from a light source 108 is received at the position of this transport process 107, and this reflected light passes through mirrors 109 and 110, and further passes through a lens 111, and is imaged on a photoelectric conversion element 112 such as a charge-coupled device CCD, and is separately converted into an electrical signal. will be replaced with On the top of the transportation means 103 to 106, there is a printed circuit board 113 (hereinafter referred to as "OP
A CNT substrate (abbreviated as "CNT substrate") is provided, and means such as switches are configured here, and receives human power from an operator from outside.

The upper halves of the document conveying means 103 to 106 are included in the operation panel unit, and have a structure in which they open in the direction of the arrow with rotation center 114 in the figure. Therefore, when a document jams, the paper path is opened and the document can be easily removed.

In the center of the figure, a roll of thermal paper 1]5 is stored, and a thermal head is placed at the bottom of the document table! 16 and the platen roller 117, the paper is printed and recorded while being discharged toward the arrow B side.

In the figure, 118 is a power supply, 119 is a printed circuit board for system control (hereinafter abbreviated as "5CNT board 0"), and 120 is a network control unit (hereinafter, abbreviated as "5CNT board 0") for connection with a telephone line. “N.C.U.
OP CNT substrate 113
and 5CNT board 119, between NCU board 120 and 5CNT
Power lines and signal lines (not shown) pass between the substrates 119, respectively.

FIG. 5 shows a sectional view of a main part of an example of a facsimile equipped with a telephone as another conventional example.

When the original M103 is inserted up to the feeding roller 132 portion, conveyance is started, and the image sensor unit 133 conveys the original M103 while being pressed by the image sensor 133 by the platen roller 134. During this time, the image is read and the original M103 is conveyed in the direction of arrow C. be done. An operation panel unit 135 is configured above the document conveying means, and an OP CNT substrate 13 is installed in the operation panel unit 135.
6 is stored.

On the other hand, the rolled thermal paper 137 is transferred to the thermal head 138.
Printing is recorded by the cooperative action of the and platen rollers 139, and the paper is discharged to the outside of the machine in the direction of the arrow. Here, 140 is a power supply, 141 is a board that is a combination of the 5CNT board 119 and the NCU board 120, and 142 is a telephone circuit board that controls the speech network. Here, between the OP CNT board 136 and the 5CNT119 board, and between the telephone circuit board and the 5CNT board,
Power supply lines and signal lines travel between the NT boards 119, respectively.

(Problem to be solved by the invention) As mentioned above, in the case of the conventional facsimile, OP CNT13
6 is located at the top due to necessity of operation, but other printed circuit boards, 5CNT119°NCUl 20. Telephone circuits etc. are arranged separately. Therefore, there was a necessity for harness processing to connect the boards.

Therefore, problems related to harness processing include: (1) A space is required to pass the harness through, which requires space.

(2) It is necessary to process between mechanical systems, and care must be taken to avoid touching moving parts of mechanical systems and sharp edges. This has the disadvantage of reducing the degree of freedom in mechanical system design and creating various constraints.

(3) A connector for receiving the harness is required on each board, which is disadvantageous in terms of space and cost.

(4) As in the example shown in FIG. 4 <OP CNT substrate 113
However, if the harness is placed on a rotating unit, it is necessary to pass the harness through the center of rotation or take up slack, and to prevent it from getting caught after opening and closing operations. The limitations at the top were lifted.

(5) The more harnesses there are in a device, and the longer they are, the more likely electromagnetic interference (EMI) will occur.As EMR regulations have increased in recent years, dealing with this has become difficult and costly. ing.

(6) The more harnesses there are in a device, the more troubles there will be in productivity and quality, so it is desirable to reduce the number of harnesses.

The present invention has been made in view of the problems of the prior art as described above, and an object of the present invention is to provide an image forming apparatus of this type that solves these problems.

(Means for Solving the Problems) Therefore, in the present invention, the main functions of an image forming apparatus such as a facsimile are housed in one printed circuit board, which is placed on the upper side of the apparatus, and The purpose of navigation is achieved by providing a document conveyance system, a recording material conveyance system, etc., and by configuring the upper unit to be openable to the lower device.

(Function) With the above-described configuration, it is possible to eliminate the drawbacks associated with the harness processing of the conventional apparatus, and to provide a facsimile apparatus whose performance of the paper feeding system is comparable to that of the conventional apparatus.

〔Example〕

The present invention will be explained below based on examples.

FIG. 1 shows a sectional view of essential parts of an embodiment of a facsimile according to the present invention.

1 is the OP CNT113.5C in the conventional example.
NTI 19. It is a printed circuit board that incorporates functions such as NCUI 20, and is structured in a large size from the live bait to the back of the device (from left to right in the figure). On this board 1, there are, for example, a switch 2 for receiving input from an operation panel, and a CPU 3 for system control. An NCU let coil 4 is provided, and each functional section is connected by a printed pattern. 5 is an exterior cover that includes an operation panel and covers the upper side of the device.

A cover 6 is disposed below the printed circuit board 1 to partition it from the lower part of the device, and forms an upper unit with the printed circuit board 1 sandwiched between the outer cover 5 and the outer cover 5.

When the original i7 placed on the desk is inserted up to 8 portions of the feeding roller, it is fed into the apparatus by cooperation with the platen roller 9, and the image is read by the image sensor 10 along the way. The image sensor 10 is connected to a lever 11, rotates about a fulcrum 12, and comes into contact with the surface of the platen roller 9. Further, the image sensor 10 is constantly biased toward the platen roller 9 by an elastic biasing means 13 such as a compression coil spring. The read N8I is discharged in the direction of arrow E by the cooperative action of the paper discharge roller 14 and the platen roller 9. That is, after being inserted rightward in the figure from the document insertion slot, the document is conveyed in a U-turn, and a power supply device 15 is disposed in the center of the apparatus, which is formed from the upper part of the insertion slot. At the back of the device (on the right side of the diagram) is a roll of thermal paper! 6 is placed,
The print is recorded by the cooperative action of the thermal head 17 and the platen roller 18 configured in the upper unit.J, arrow F
It is ejected out of the aircraft. The thermal head 17 is supported on a lever 19, is rotatable, and is biased toward the platen roller 18 by a compression coil spring 20.

The -F unit rotates in the direction of arrow G about the fulcrum 21 on the hand side as shown in FIG. Therefore, it is easy to replace the recording paper 16 and take out the original.

Further, if the partition plate of the upper unit is made of metal, it acts as an electromagnetic shield for the printed circuit board 1, and becomes a countermeasure against EMI.

(Other Embodiments) FIG. 3 is a perspective view of another embodiment of the present invention incorporating a telephone function.

The handset 22 is arranged on the left side of the upper cover 5, and a curl cord 23 comes out from one end 22a and is attached to the upper cover 5.
It is attached to a part 24 of.

In the front area 25 of the device, an input/output section mainly for facsimile functions is arranged. In other words, the number 26 required when making a call or registering. One-touch key part 27. L.C.
D-like display 28. Facsimile function keys such as density switching and linear density switching 29. 30, etc., such as a start key.

On the other hand, on the back side of the device, a group of keys 31 for different functions are arranged. These constitute functions that are closely related to the telephone circuit, such as a call dial key, a hold key, and a speaker volume for line monitoring.

With this configuration, it is possible to create a layout in which the facsimile function and the telephone function are separated, making it difficult to make mistakes in use. Furthermore, from a manufacturing standpoint, if telephone circuits are constructed at corresponding locations on the printed circuit board 1 disposed under the upper cover, functional separation can be achieved and pattern traffic can be reduced.

That is, according to this embodiment, since the upper part of the upper cover 5 of the device can be used as an area for the operation panel, it is possible to rationally separate and arrange each function on the printed circuit board 1 and to improve the design. Balancing improvements in usability and ease of use allows for more freedom in design than in the conventional example.

Further, there is no need to connect each function by harness processing as in the conventional example, and wiring can be easily performed using a printed pattern.

Further, there is a hook switch (not shown) below the handset 22, which is also integrally formed on the printed circuit board 1, eliminating the need for harness processing.

(Effects of the Invention) As described above, according to the present invention, the main functions of an image forming apparatus such as a facsimile are housed in one printed circuit board and are arranged on the top side of the apparatus, so that the operation function is , system control, network control units, telephone circuits, and other functions that were conventionally connected using harnesses can be connected without harness processing.

Therefore, there is an effect that all of the above-mentioned conventional problems related to harness processing are eliminated. That is: (1) No space is required for the harness to pass through.

(2) Consideration regarding harness processing is no longer required, increasing the degree of freedom in designing the mechanical system.

(3) EMI countermeasures become easier.

(4) Productivity and quality can be improved.

(5) Each function can be placed separately on the printed circuit board, increasing the degree of freedom in designing the operation panel.

(6) Since each function of the image forming apparatus is housed on a single printed circuit board, shielding becomes easy and EMI countermeasures become easier.

(7) Since the entire top surface of the device can be used as an operation panel, the operation panel can be easily constructed even when downsized and the cost can be reduced.

(8) As described above, it is possible to provide an apparatus in which the performance of the paper feeding system for originals and recording paper is not impaired even when the printed circuit board is arranged upward. Such.

[Brief explanation of drawings]

FIG. 1 is a sectional view of essential parts of an embodiment of the facsimile machine of the present invention, FIG. 2 is a diagram of the rotation state of the upper unit in FIG.
Figure 4 is a perspective view of another embodiment of a conventional facsimile equipped with a telephone, Figure 4 is a cross-sectional view of the main parts of an example of a conventional facsimile machine, and Figure 5 is a schematic diagram of another example of a conventional telephone equipped type. FIG. 1 is a printed circuit board, 5 is an upper cover, 6 is a lower partition plate, 7 is an original, 9 is a platen roller, 10 is an image sensor, 15 is a power source, 16 is a roll of recording paper, 17 is a thermal head, 18 is a platen roller It is.

Claims (3)

[Claims] (1) Equipment system control function, operation function,
An image forming apparatus characterized in that main functions such as a network control function are configured on a single printed circuit board, and the printed circuit board is disposed in a space above the apparatus. (2) The image forming apparatus according to claim 1, further comprising a document conveying means and a recording material conveying means disposed below the printed circuit board. (3) The image forming apparatus according to claim 1, wherein the upper unit housing the printed circuit board is configured to be openable to a lower device.