JPH0623013Y2 - Printed board - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION A Field of Industrial Application The present invention relates to a printed circuit board, and is suitable for application to, for example, a multi-wire wiring board.

B Outline of the Invention The present invention is to attach a charactor using a specific line segment that avoids the point of the above-mentioned predetermined interval in a printed circuit board that has been repeatedly drilled with holes at a predetermined interval or an integer multiple thereof. Therefore, it is intended to propose a printed circuit board which allows the component mounting position to be visually checked easily when the component is mounted.

C. Related Art Conventionally, in a printed circuit board using a multi-wire wiring board, matrix-shaped points (hereinafter referred to as spare points) at predetermined intervals, for example, 2.5 mm intervals are set in advance, and the connection terminals of mounting parts are The one in which the arrangement of parts is determined so as to be located on a point is used.

In this type of multi-wire wiring board, based on the circuit to be formed, after arranging a thin wire covered with insulation between the spare points where the terminals of the mounting component are located in the state where the mounting component is arranged, A necessary circuit pattern is formed by processing through holes in the points.

Therefore, in the multi-wire wiring board, it is possible to form circuit patterns of various configurations by arbitrarily selecting the wiring and the snowhole hole processing positions described above, so that a general-purpose circuit board can be formed. Can be widely applied to various uses.

Further, in a multi-wire wiring board, in order to increase versatility, a common printed circuit board commonly uses a screen for position display printing of mounting components created for each circuit board, and even if different circuit boards are used, The same position is displayed.

That is, for example, as shown in FIG. 4, on a printed circuit board 2 of a multi-wire wiring board having a predetermined shape having a connection portion 1 for a card connector at the lower end, a longitudinal direction and a lateral direction representing a grid 6 for mounting component placement. The ruled lines 3 are formed, and at the same time, the English characters 4 representing the horizontal position of the cells 6 and the several characters 5 representing the vertical positions are formed on the peripheral portion of the printed circuit board 2, and the cells 6 and the English characters are formed. 4 and several characters 5 are used to represent the component mounting position.

Incidentally, the ruled line 5 is linearly printed so as to cross the center between the adjacent preliminary points among the matrix-shaped preliminary points at the intervals of 2.5 mm.

Then, when actually mounting the component, after placing the printed circuit board 2 on the fixed base, while observing the English letters 4 and the several letters 5, the position of the predetermined grid 6 is confirmed, and for example, this grid is used. When a 20-pin IC block is mounted in the eye 6, the IC block is mounted by inserting a lead into a predetermined through hole in the eye 6, and for example, a shape larger than the eye 6 is mounted. When mounting a 24-pin IC block, the leads of the IC block are mounted using the through holes of two adjacent cells 6 so as to straddle the ruled line 3 of the cell 6.

D The problem to be solved by the invention is that, when the component mounting position display as shown in FIG. 4 is used, the printed circuit board 2 is mounted on the frame of a fixed base (not shown) when the component is mounted on the printed circuit board 2. When fixed, there is a problem that the English letters 4 and several letters 5 on the peripheral portion are hidden by the frame, and as a result, the component mounting position cannot be visually confirmed.

In order to solve this problem, for example, as shown in FIG. 5, there is a method of providing the position indication 7 of the grid 6 on the inner surface of the straight grid 6.

That is, for example, a ruled line 3 is formed so that a land 8 of a 20-pin dual-in-line IC block and a bypass through-condensed through-hole is provided in one cell 6, and inside the cell 6, several characters 7a for indicating the position are formed. And draw the alphanumeric character 7 consisting of the English character 7b.

In this way, the position of the grid 6 can be read straight by using the alphanumeric characters 7 provided inside the grid 6.

However, when the screen for printing the ruled lines 3 and the alphanumeric characters 7 is used to display the component mounting position on the multi-wire wiring board having a through hole position different from that of the printed circuit board 2, the land of the through hole is displayed. The alphanumeric character 7 may be printed in an overlapping manner. When the alphanumeric characters 7 are overlapped and printed on the land 8 in this manner, the printing ink penetrates into the through hole, and as a result, an insulating layer is formed in the through hole and the terminal of the mounted component is formed. This will result in poor conduction between the through holes.

For this reason, conventionally, a mask has been provided on the printed circuit board in advance so as not to print the portions that may overlap, to prevent the invasion of ink. However, in this case, there is an inconvenience that the alphanumeric character indicating the grid position cannot be displayed for this mask portion.

The present invention has been made in view of the above points, and an object of the present invention is to propose a printed circuit board that allows easy visual confirmation of the component mounting position when mounting components and does not cause conduction failure. Is.

E Means for Solving the Problems In order to solve the problems, in the present invention, in the printed circuit board 10 in which holes are drilled at the predetermined preliminary points a among the preliminary points a arranged at predetermined intervals in a matrix shape. , A spare point different from the above-mentioned spare point that has been drilled so that the character 12 which is a numeral and / or a character is attached using the line segments 15, 16 and 17 connecting the central points P1 to P4 of the adjacent spare points a. Between the printed circuit board with holes
The screen to which the charactor 12 is attached is commonly used.

F action The line segments 15, 16 connecting the central points P1 to P4 of the preliminary point a,
By attaching the charactor 12 by using 17, the charactor 12 can be displayed at a desired position while avoiding the hole processing point of the printed circuit board 10, thus obtaining a display that allows easy confirmation of the component position. You can

G Embodiment An embodiment of the present invention will be described in detail below with reference to the drawings.

In FIG. 1 in which parts corresponding to those in FIG. 4 are designated by the same reference numerals, the component mounting surface of the printed wiring board 10 using a multi-wire wiring board is preliminarily arranged at intervals of 27.5 mm in the horizontal direction and 10 mm in the vertical direction. Ruled lines 11h ₁ to 11h ₁₁ and 1 so as to cross the center of adjacent spare points among the spare points defined at 2.5 mm intervals.
1 _{V1 to} 11 _V6 are printed to form the mesh 6.
Of the ruled lines 11h _{1 to} 11h ₁₁ and 11 _{V1 to} 11 _V6 , the third, sixth, and ninth ruled lines 1 from the lower end in the horizontal direction.
1h ₃ , 11h ₆ and 11h ₉ and 3rd and 6th from the left end
The first vertical ruled lines 11 _V3 and 11 _V6 are formed by a constant chain line, and the other ruled lines 11h ₁ to 11h ₂ and 11h ₄ to.
11h ₅ , 11h _{7 to} 11h ₈ , 11h _{10 to} 11h
₁₁ , 11 _{V1 to} 11 _V2 , 11 _{V5 to} 11 _V6 are formed by solid lines.

Further, alphanumeric characters 12 are printed in the cells 6 as identification codes indicating the horizontal and vertical positions of the cells 6.
As shown in FIG. 2, such an alphanumeric character 12 is a line segment running in the lateral direction connecting the central points P1 and P2 located in the center between the preliminary points a which are spaced 2.5 mm apart on the printed circuit board 10. 15, line segment 1 connecting the central points P3 and P4 and running in the vertical direction
6, central points P1 and P3, P3 and P2, P2 and P
4, P4 and P1 are connected to each other, and the line segment 17 runs in an oblique direction and is displayed as shown in FIG.

That preliminary point _a 1-4 _~a 4-4 from the left end in the horizontal direction in the preliminary point _a 1-1 _{~a 4-11} of squares _{6, a 1-7} ~
Three areas AR1 to AR3, which are partitioned by a _4-7 and a _{1-10 to} a _4-10 , respectively, are provided, and several characters 20 representing the vertical position of the grid 6 are provided in the two areas AR1 and AR2 from the left end. Is printed, and the English character 21 indicating the horizontal position is printed in the third area AR3. For example, several characters "1" to be printed in the first area AR1 among several characters 20 are represented by using a line segment 15 running in the horizontal direction and a line segment 16 running in the vertical direction shown in FIG.

Similarly, for example, several characters "0" in the second area AR2 are represented by using a line segment 15 running in the horizontal direction, a line segment 16 running in the vertical direction, and a line segment 17 running in the diagonal direction.

Similarly, for example, the letter "A" in the third area AR3 is represented using a line segment 15 running in the horizontal direction, a line segment 16 running in the vertical direction, and a line segment 17 running in the diagonal direction.

Note that other alphanumeric characters can be similarly expressed by combining line segments 15 to 17 running in the vertical, horizontal, and diagonal directions.

In the above configuration, a spare point a shown in FIG. 3 is provided so that, for example, a 20-pin dual in-line IC block and a bypass capacitor for the power supply thereof are mounted in each of the cells 6.
Through holes for ICs are formed in _{1-1 to} a _1-10 and a _{4-1 to} a _4-10 , and a preliminary point a
_When through holes for bypass capacitors are formed in _1-11 and a _2-11 , the ruled line 11 and the alphanumeric characters 20 and 21 do not overlap with the land of the through holes of the IC block and the bypass capacitors. .

Further, in the case of a multi-wire wiring board, a through hole that connects the pattern with the component mounting surface and the back surface thereof is also formed on the spare point a, so that the through hole and the ruled line 11 and the alphanumeric characters 20, 21 are weighted. There is no matching part.

Even if a 24-pin IC block is used instead of the 20-pin IC block, the 24-pin I block
Since the hole processing position of the through hole connecting the C block is provided on the preliminary point a, there is no risk of overlapping portions.

According to the above configuration, when the component is mounted, the alphanumeric characters 20 and 21 representing the horizontal and vertical positions of the grid 6 are printed directly inside the grid 6 of the component mounting surface.
The component mounting position can be easily checked visually. Moreover, since the printing is performed so as to avoid the preliminary points, it is possible to prevent the occurrence of the defective conductive surface by providing the position indication of the component mounting in the grid 6.

Further, after mounting the components, even if the position indication in the grid 6 of the component mounting surface is hidden by the mounting components, the ruled lines 11 on the printed circuit board 10 and the English characters 4 and several characters 5 representing the positions of the grids 6 are displayed. Therefore, since the position of the mounted component can be easily visually checked, the maintainability of the mounting board can be improved.

Further, in the above-mentioned embodiment, since the alphanumeric characters are configured by using the line segment in the predetermined direction with respect to the arrangement direction of the spare points, the screen for silk printing is automatically created by using, for example, a photoproctor. In this case, alphanumeric characters can be created extremely easily and in a short time, and ruled lines can be created using these line segments.

Further, in the above-described embodiment, since the ruled line is represented by the alternate long and short dash line for every third line, it is possible to easily visually check the position of the attached component, for example, in the central portion of the printed circuit board 10 after component mounting. You can

In addition, in the above-mentioned embodiment, the case where the ruled lines 11 are represented by the alternate long and short dash lines for every three lines has been described. The broken line and the constant chain line may be combined and represented.

It should be noted that in the above-described embodiment, the case where the position indication is printed on the component mounting surface of the printed circuit board 10 has been described, but the present invention may additionally print on the back surface of the component mounting surface. In this case, for example, when the jumper wire is arranged on the back surface of the component mounting surface after the components are mounted, the position of the mounted component can be easily confirmed from the back surface, so that workability can be further improved.

Further, in the above-mentioned embodiment, the case where the alphanumeric character is used as the identification code for the work display has been described, but the present invention is not limited to this and, for example, a charactor of Arabic numerals or Greek letters can be widely used as the identification code.

Further, in the above-mentioned embodiment, the case where the grid 6 is formed and the identification code indicating the component mounting position is attached to the grid 6 is described, but the present invention is not limited to this, and only the identification code is displayed without the grid. Further, it can be widely applied not only for displaying the component mounting position but also for printing a character representing the component number of the board, for example.

Further, in the above-mentioned embodiment, the case where the present invention is applied to the printed circuit board of the multi-wire wiring board has been described, but the present invention is not limited to this, and the printed circuit board in which the holes for mounting the parts are changed by a predetermined pitch is described. It can be widely applied when silk printing is performed.

H Effect of the Invention As described above, according to the present invention, it is possible to obtain a printed circuit board whose component position can be easily confirmed during component mounting work.

[Brief description of drawings]

FIG. 1 is a plan view showing an embodiment of a printed circuit board according to the present invention, FIG. 2 is a schematic diagram showing display elements for silk printing, and FIG. 3 is a printed circuit board showing the display mode. FIG. 4 is a partially enlarged view, FIG. 4 is a plan view showing a conventional printed circuit board, and FIG. 5 is a partially enlarged view of the printed circuit board used for the explanation. 2, 10 ... Printed circuit board, 3 and 11h _{1 to} 11
h ₁₁ , 11 _{V1 to} 11 _V6 ... Ruled line, 4, 21 ... English characters, 5, 20 ... Several characters, 6 ... Grid, 8 ... Land, 15, 16, 17 ... Line segment, a …… Preliminary point.

Front page continued (72) Inventor Yoshitaka Kurauchi 6-7-35 Kitashinagawa Shinagawa-ku, Tokyo Sony Corporation (56) Reference JP 58-73182 (JP, A) (JP, U) Actually opened 56-51379 (JP, U) Actually opened 57-73961 (JP, U)

Claims (3)

[Scope of utility model registration request] 1. A printed circuit board in which holes are formed in predetermined spare points among spare points arranged at a predetermined interval in a matrix shape, by using a line segment connecting a center point between adjacent spare points. Make sure to attach characters that are numbers and / or letters,
A printed circuit board, wherein a screen to which the charactor is attached can be commonly used between the holed spare point and a printed circuit board which has different spare points drilled. 2. The printed circuit board according to claim 1, wherein the charactor represents an identification code of each of the cells formed by ruled lines. 3. The printed circuit board according to claim 2, wherein the ruled lines have different shapes at predetermined intervals.