JPH0451504Y2 - - Google Patents

Description

[Detailed explanation of the invention] [Summary] This invention relates to printed wiring boards, and more specifically, to the connection routes of wiring conductors that form signal lines.
In order to facilitate work such as wire connection and reduce the number of man-hours, grouped wiring conductors and cutting wiring conductors with lands wired in parallel within a specific area are connected in series and relayed in correspondence with each other. Configure to connect.

[Industrial application field]

This invention relates to printed wiring boards, and more specifically,
This invention relates to connection paths for wiring conductors forming signal lines.

After circuit components are mounted on wiring conductors of a printed wiring board, it is easy to update the electronic circuit to change specifications or add functions, especially in the early stages of development or prototyping.

Therefore, there is a need for a printed wiring board that allows easy modification work such as replacing circuit components, cutting wiring conductors, and adding wires.

[Prior Art] As shown in the plan view of FIG. 2, a conventional printed wiring board 11 has terminals (not shown) connected to an external circuit.
, a component connection land (including through-holes) 12 for connecting circuit components (not shown), and wiring that forms a predetermined electric circuit by connecting these component connection lands 12 to each other, that is, a signal line. A wiring conductor 13 is provided.

After mounting a circuit component (not shown) on the component connection land 12, if it becomes necessary to update the electronic circuit to change specifications or add functionality, place the wiring conductor 13 to which the circuit component is connected at the X mark position. The circuit is changed by cutting it and connecting an additional wire 15 indicated by a broken line as necessary.

[Problem that the invention attempts to solve]

However, according to the above-mentioned printed wiring board, the cutting position of the corresponding conductor wiring on the printed wiring board and the land position to connect the additional wire are determined by looking at the renewal instruction drawing, that is, the drawing showing the cutting position and its wiring table. The problem was that it took a lot of man-hours to search, disconnect, and connect the wires, and required skill. Further, when the additional wire is connected to a land where a lead of a circuit component is connected, there is a risk that a connection failure may occur due to loose solder.

In view of the above problems, an object of the present invention is to provide a printed wiring board that facilitates operations such as searching for conductor wiring, cutting, and connecting wires associated with renewal of electronic circuits, and reduces the number of work steps.

[Means for solving problems]

The above-mentioned problems with conventional printed wiring boards are solved by connecting the grouped wiring conductors and the cutting wiring conductors with lands, which are wired in parallel in a specific area, in series in correspondence with each other. .

[Effect]

Since the changes are limited to the wiring conductors with lands for cutting within a specific area, operations such as searching for the change position, cutting, or connecting additional wires between lands can be easily performed in a short time.

〔Example〕

The gist of the present invention will be explained in detail below based on the embodiments shown in the drawings.

As shown in the plan view of FIG.
is a terminal for connecting an external circuit (not shown), a component connecting land (including through holes) 2 for connecting a circuit component (not shown), and this component connecting land 2.
Wiring conductors 3 that connect to each other to form a predetermined electric circuit, that is, signal lines, are divided into groups.

Furthermore, a wiring conductor for cutting with a land is made up of a land (including a through hole) 4a to which an additional wire 5 can be connected within a specific area 6 shown by a two-dot chain line, and a wiring conductor for cutting 4b connecting between the lands 4a. 4 are wired in parallel and connected to each of the grouped wiring conductors 3.

That is, since each signal line is always relay-connected in series with the wiring conductor 3 with land for cutting within the specific area 6, searching for the wiring conductor 3, cutting it, or connecting the additional wire 5 due to the renewal of the electronic circuit, etc. The work will be narrowed down to the specific area 6.

Therefore, it can be easily performed in a short time without requiring any skill, and the number of work steps can be reduced.

Further, since the additional wire is not connected to the land to which the circuit component is connected, there is no possibility that the solder of the component lead will become loose.

Note that the pattern of the wiring conductor in the specific area is not limited to the pattern shown in the drawings, and it goes without saying that various patterns may be formed depending on the configuration of the electronic circuit.

Further, the specific area and the wiring conductor within the specific area can be labeled with a symbol to further facilitate the search.

Furthermore, the signal wiring conductor is not limited to a signal line, but may also be a power line or a ground line.

[Effect of idea]

As detailed above, according to the present invention, it is possible to easily change the circuit of a printed wiring board, reduce the number of work hours, and provide a highly reliable printed wiring board package. exert a useful effect.

[Brief explanation of the drawing]

Figure 1 is a plan view of one embodiment of the present invention;
The figure is a plan view according to the prior art. In the figure, 1 is a printed wiring board, 2 is a land for connecting components, 3 is a wiring conductor, 4 is a wiring conductor for cutting with a land, 4a is a land, 4b is a wiring conductor for cutting,
5 indicates an additional wire, and 6 indicates a specific area.

Claims (1)

[Scope of utility model registration request] Grouped wiring conductors 3 and specific areas 6
Cutting wiring conductor 4 with land wired in parallel inside
1. A printed wiring board characterized in that the printed wiring board is provided with a corresponding relay connection in series.