JP2830861B2 - Printed board - Google Patents

Abstract

PROBLEM TO BE SOLVED: To attain the connection of a plurality of signal conductors with a plurality of units simply and at low cost by a method wherein a printed board is constituted into a structure, wherein the plurality of the one-layer signal conductors are bent. SOLUTION: Segments AA', BB', CC' and DD' are parallel to each other. A terminal part area (1) exists in the region of a parallelogram ABB'A'. The length t1 of a perpendicular from the segment AA' to the segment BB', the length t2 of a perpendicular from the segment BB' to the segment CC' and the length t3 of a perpendicular from the segment CC' to the segment DD' are equal. A terminal part area (2) exists in the region of a parallelogram CDD'C'. When a plurality of one-layer signal conductors are bent from the position of the segment BB' to the opposite surface to the surface of the terminal part area (1) at 180 deg., the signal conductors are provided in such a way that a point C is superposed on the position of a point A'. When the signal conductors are bent from the position of the segment CC' to the direction of the same surface as that of the area (1) at 180 deg., the signal conductors are provided in such a way that a point D is superposed on the position of a point D. As a result, when the signal conductors are bent, the surface of the terminal part area (2) becomes the same surface as that of the terminal part area (1). Moreover, the length t1 of the perpendicular from the segment AA' to the segment BB' is made equal with a board width subsequent to the bending of the signal conductors.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] 1. Field of the Invention [0002] The present invention relates to a printed circuit board for connecting a plurality of signal lines to a plurality of units.

[0002]

2. Description of the Related Art Conventionally, when each unit is connected to a plurality of signal lines, for example, a bus by wiring, as shown in FIG. 8, a wiring is drawn from a linear bus and connected to each unit. The bus and the wiring to be drawn cross each other, and the pattern of the wiring is another layer to form two layers.

[0003]

As described above, conventionally, when each unit is connected to a bus, since each unit crosses a linear bus, the unit is drawn out from a wiring pattern on another layer and connected. However, there is a problem that the cost is increased due to a multi-layer structure.

[0004] The present invention solves these problems,
It is an object of the present invention to bend a plurality of wiring patterns in one layer to realize connection of a plurality of signal lines to a unit easily and at low cost.

[0005]

Means for solving the problem will be described with reference to FIGS. 1 to 3 and the like. 1 to 3 and the like, a sheet 1 is provided with a terminal portion 2 for connecting a plurality of bendable signal lines to a unit.

The terminal 2 is a terminal for connecting a plurality of signal lines on the sheet 1 to a unit (not shown). next,
The manufacturing method will be described.

A foldable sheet 1 provided with a plurality of signal lines and a plurality of terminal portions 2 for connecting each signal line to a unit is formed by folding each of the terminal portions 2 twice. Are repeatedly arranged at predetermined positions on the same surface.

Further, a foldable sheet 1 provided with a plurality of signal lines of one layer and a plurality of terminal portions 2 for connecting each signal line to each unit is provided. Is repeatedly arranged at a predetermined position on the front and a predetermined position on the back.

A foldable sheet 1 provided with a plurality of signal lines of one layer and a plurality of terminal portions 2 for connecting each signal line to each unit is provided. Alternatively, they are repeatedly arranged at predetermined positions by a combination of two bends.

A foldable sheet 1 provided with a plurality of signal lines and a plurality of terminal sections 2 for connecting each signal line to each unit is provided. Each of the terminal sections 2 supports the sheet 1. And repeatedly arranged at a predetermined position.

The terminal portion 2 is arranged in a straight line by repeatedly arranging the terminal portion 2 at a predetermined position by bending the sheet 1 twice.
Alternatively, the same arrangement is made for each of the plurality of terminal portions 2.

Therefore, it is possible to bend one layer of a plurality of wiring patterns and to connect a plurality of signal lines to each unit simply and at low cost.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment and operation of the present invention will be described in detail sequentially with reference to FIGS.

FIG. 1 is a flow chart for designing an FPC (flexible printed circuit board) according to the present invention. In FIG. 1, S1 determines an area necessary for forming an electrode of the terminal portion 2 after bending. This is because the electrode 5 of the terminal portion 2 after bending is shown in FIG.
The terminal area 4 necessary for the formation is determined.

In step S2, a terminal area width W 'and a terminal area length L' are set. This is because the electrode 5 of the terminal portion 2 after bending is shown in FIG.
The width W 'of the terminal area and the length L' of the terminal area necessary for forming the terminal area are set.

In step S3, a distance P 'between the terminal area is set. This sets the distance P 'between the terminal area necessary for forming the electrode 5 of the terminal 2 after bending, as shown in the completed drawing of FIG. 2 described later.

In step S4, the substrate width W after bending is set. This sets the substrate width W after bending as shown in the completed drawing after bending in FIG. 2 described later. In step S5, a developed view is created and bent. Then, it is determined whether the design requirements are satisfied. If YES, the process ends. N
In the case of O, S2 and subsequent steps are repeated until the condition is satisfied.

As described above, the width W ′ and length L ′ of the terminal area 4, the distance P ′ between the terminal areas, and the width W of the substrate are set on the completed completed drawing, and then the developed area is further expanded. A sheet 1 of a plurality of signal lines is prepared, bent and fixed according to a developed view, and a board (printed board) having a completed bent view as shown in FIG. 2 can be prepared. The details will be sequentially described below.

FIG. 2 shows a completed bent view of the present invention.
This explains how to design a completed drawing to be created after bending. Each symbol has the content described in the upper right.

In FIG. 2, the terminal portion 2 is for connection (for example, by soldering) to an external unit (not shown). Here, a plurality of electrodes 5 are provided.

The terminal area 4 is an area where a plurality of electrodes 5 are provided. The electrode 5 is an electrode for connection (solder connection) to a unit (not shown). Hereinafter, the design procedure will be described in detail.

In the case where the terminal portion repeatedly appears on the same surface due to the two bends: (1) A terminal portion area 4 necessary for forming an electrode of the terminal portion is determined (S2 in FIG. 1).

The terminal area width W ′ and the terminal area length L ′ are determined in advance to arbitrary numerical values. The length P 'between the terminal area is determined in advance to an arbitrary value.

The terminal area (1) is rectangular abcd
Decide. Terminal area (2) is rectangular a'b'c '
Decide d '. The terminal area (1) and the terminal area (2) are on the same plane, and a point a ′ of the terminal area (2) exists on the extension of the line segment ad of the terminal area (1).

The line segment ad and the line segment bc are parallel to the line segment AA ′. The pitch P is obtained from Equation 1. P = L ′ + P ′ (Equation 1) (2) Graphic definition points A, B, C, and D in the developed view of FPC (FIG. 3) are located on the same FPC edge.

The points A ′, B ′, C ′, and D ′ are the same F
It is located on the other side of the PC. The extension of the line segment AD and the extension of the line segment A'D 'are parallel.

Line segments AA ′, BB ′, CC ′, DD ′
Are parallel to each other. The terminal area (1) exists in the area of the parallelogram ABB'A '. Length t1 of the perpendicular from line AA 'to line BB', length t2 of the perpendicular from line BB 'to line CC', line D
The length t3 of the perpendicular from D 'to the line segment DD' is the same,
This length is W.

T1 = t2 = t3 = W (Equation 2) The terminal area (2) is a parallelogram CDD'C '.
In the region of.

(3) Relationship between Angle θ and Substrate Width W after Bending Let the angle consisting of ∠BAA 'in FIG. 3 be θ. FIG.
In the above, when the FPC is bent 180 ° from the position of the line segment BB ′ to the surface opposite to the surface of the terminal area (1), the point C overlaps the position of the point A ′.

This is because t1 = t2 (= W) The line segments AA ', BB' and CC 'are parallel to each other. Thereafter, when the line segment CC' is bent 180 ° from the position of the line segment CC 'in the same plane direction as the terminal area. D overlaps the position of the point B ', and as a result, the terminal area (2) appears on the same plane as the terminal area (1).

Further, the length t1 (= W) of the perpendicular from the line segment AA 'to the line segment BB' becomes the substrate width (= W) of the completed drawing after the FPC bending in FIG. Here, the line segment AA '
And the length of the line segment BB 'are equal because the line segment AA' and the line segment BB 'are parallel and the line segment AB and the line segment A'B' are parallel.

AA ′ = BB ′ (Equation 3) Similarly, in FIG. 2, the length of the line segment AA ′ is represented by a point a,
The line segment aa 'connecting the point a' and the line segment AA 'are parallel,
In addition, since the line segment AB and the line segment A'B 'are parallel, the length of the line segment aa' is equal to the length of the line segment aa '. Therefore, Equation 4 holds.

AA ′ = aa ′ = L ′ + P ′ (Equation 4) In FIG. 3, focusing on the triangle CAA ′, this triangle is bent from the position of the line segment BB ′ parallel to the line segment AA ′. Since the point C sometimes overlaps with the position of the point A ′, a right triangle CAA ′ is formed, and the length of a perpendicular to the line segment BB ′ is set as the substrate width W after bending.

A′C = 2W (Equation 5) Accordingly, the relationship between the angle θ and the substrate width W after bending is represented by Equation 6, where W is the angle θ and an arbitrary numerical value determined in advance, and the above L ′ And P '.

Tan θ = 2W / (L ′ + P ′) W = {(L ′ + P ′) × tan θ} / 2 (Equation 6) FIG. 3 is a development view (FIG. 2) of the present invention. This is shown in FIG.
2 shows a sheet 1 to which a left-side connection portion 3 has been added after the folded completed drawing is developed. Here, the terminal portion 2 corresponds to the terminal portion 2 in FIG. 2, and the electrode 5 corresponds to the electrode 5 in FIG. Also,
ABCD and A'B'C'D 'are ABCD and A' in FIG.
B'C'D 'respectively.

As described above, after a design is made so that a desired substrate can be obtained with the folded completed drawing of FIG.
, A plurality of signal lines of one layer, a plurality of terminal portions 2,
And the connecting part 3 is provided to complete the design. And FIG.
After creating a plurality of signal lines, a plurality of terminal portions 2 and a connection portion 3 in one layer as shown in (a), AA ′, BB ′, CC ′,
If the substrate is sequentially bent at the position of DD ′, the substrate (printed circuit board) shown in the completed bent diagram of FIG. 2 described above can be created.

FIG. 4 shows an example of repeating the terminal area according to the present invention. This is the case where the terminal area 4 is arranged in a straight line in the examples of FIGS. 2 and 3 described above. here,
Another example will be described.

FIG. 4A shows an example in which a staggered terminal area is repeatedly formed. This shows an example in which the terminal area 4 of FIG. 2 described above is repeatedly formed for each of the two staggered terminal area 4 as shown.

FIG. 4B shows an example in which a staggered terminal area is repeatedly formed. This shows an example in which the terminal area 4 of FIG. 2 described above is repeatedly formed for each of the three staggered terminal area 4 as shown.

As described above, by repeating every two or three (and more) staggered terminal area 4, the arrangement of the terminal area 4 is shifted little by little and connected to a unit (not shown). (Connection by soldering).

Next, the case of one diffraction will be described with reference to FIGS. FIG. 5 shows a completed bent diagram (No. 2) of the present invention. This is the completed drawing after bending, where P is the pitch, P 'is the distance between the terminal area,
W represents the substrate width after bending. Here, one diffraction,
That is, each time the terminal portion 2 is bent by 180 °, the terminal portion 2 is arranged in a reverse manner.

FIG. 6 is a development view (FIG. 5) of the present invention.
This is a sheet 1 having a plurality of signal lines, a plurality of terminal portions 4 and a plurality of connection portions 3 in one layer after the folded completed drawing of FIG. 5 is developed. P, P ', and W in the figure correspond to those in FIG.

As shown in FIGS. 5 and 6 above, by arranging the terminal portion 2 back and forth by one turn, the substrate can be formed with a simple structure. FIG. 7 shows a completed winding diagram of the present invention. this is,
A sheet 1 having a single layer of a plurality of signal lines, a plurality of terminal portions 2 and a connection portion 3 was wound around a bobbin on a cylinder instead of bending as described above, and the terminal portions 2 were arranged at predetermined positions to form a substrate. Things.

As described above, the sheet 1 having the plurality of signal lines, the plurality of terminals 2 and the connecting portions 3 of one layer is wound on a cylinder to form a substrate, thereby forming the same side on the circumference of the cylinder. Terminal part 2 on the side with geometrical uniformity
Can be created.

[0045]

As described above, according to the present invention,
Since a structure in which a substrate is formed by bending a plurality of signal lines in one layer is adopted, a printed circuit board that connects a plurality of signal lines easily and at low cost can be realized.

[Brief description of the drawings]

FIG. 1 is a flowchart of an FPC design according to the present invention.

FIG. 2 is a completed drawing of the present invention.

FIG. 3 is a development view (FIG. 2) of the present invention.

FIG. 4 is a repeated example of a terminal area according to the present invention.

FIG. 5 is a completed bent view (part 2) of the present invention.

FIG. 6 is a development view (part 2) of the present invention.

FIG. 7 is a completed winding diagram of the present invention.

FIG. 8 is an explanatory diagram of a conventional technique.

[Explanation of symbols]

 1: sheet 2: terminal section 3: connection section 4: terminal section area 5: electrode

Claims (6)

(57) [Claims] 1. A printed circuit board for connecting a plurality of signal lines to a plurality of units, comprising: a foldable sheet provided with a plurality of signal lines and a plurality of terminal portions for connecting the signal lines to the unit. , the respective terminal portions, twice to the same direction of the sheet
Repeat folding oblique, printed circuit board, characterized in that it has to be repeatedly arranged in a predetermined position. 2. A printed board for connecting a plurality of signal lines to a plurality of units, comprising: a foldable sheet provided with a plurality of signal lines and a plurality of terminal portions for connecting the signal lines to the unit. , the respective terminal portions, once in the same direction of the sheet
A printed circuit board characterized by repeating diagonal bending so as to be repeatedly arranged at a predetermined position on the front and a predetermined position on the back. 3. A printed circuit board for connecting a plurality of signal lines to a plurality of units, wherein a foldable sheet provided with a plurality of signal lines and a plurality of terminal portions for connecting the signal lines to the unit is provided. , the printed circuit board to which the respective terminal portions, repeating a combination of one or two oblique bending in the same direction of the sheet, characterized in that so as to be repeatedly arranged in a predetermined position. 4. A terminal according to claim 1, wherein said terminal portions are repeatedly arranged at predetermined positions by one or two bendings of said sheet, and said terminal portions are arranged linearly or the same arrangement is provided for each of a plurality of terminal portions. The printed circuit board according to any one of claims 1 to 3. 5. A printed circuit board for connecting a plurality of signal lines to a plurality of units, comprising: a foldable sheet provided with a plurality of signal lines and a plurality of terminal portions for connecting the respective signal lines to the unit. , the printed circuit board to which the respective terminal portions, and the sheet <br/> with wound obliquely to the support, characterized in that it has to be repeatedly arranged in a predetermined position. 6. The terminal according to claim 5, wherein said terminal portions are arranged in a straight line or are arranged in the same manner for each of a plurality of terminal portions so as to be repeatedly arranged at predetermined positions by winding said sheet around a support. Printed board.