JPH0326321Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention is applied to electrical/pneumatic measurement equipment such as I/P converters or P/I converters that use both electrical signals and pneumatic signals as input or output. Concerning circuit boards.

[Conventional technology]

Conventionally, air is used to transmit signals, and pneumatic-to-electrical converters that convert the air pressure (or flow rate) into electrical signals, and electrical-to-pneumatic converters that convert electrical signals to pneumatic signals, use air to transmit signals. A circuit board and an air circuit board are used. A general printed circuit board is used as the electric circuit board, and electric components, conversion units, etc. are mounted on it. On the other hand, air circuit boards are made of two boards glued together with a groove in one board, or a gasket sandwiched between two boards with a groove in it, to which manifold nipples etc. are attached. There is.

[Problem that the invention attempts to solve]

However, in the conventional converter of this type, the electric circuit board and the air circuit board are formed separately and independently from each other, so the number of parts increases accordingly, and it is not possible to provide the converter at a low cost.

[Means for solving problems]

The electric/pneumatic circuit board of the measuring instrument has the smooth surface of the printed circuit board that avoids the raised part caused by the formation of the electric circuit pattern as the air circuit section, and the air circuit section on the surface of the printed circuit board corresponding to the air circuit section. A plate equipped with a circuit is tightly fixed to a printed circuit board.

[Effect]

In the present invention, since the printed circuit board serves both as an electric circuit forming member and an air circuit forming member, the number of parts can be reduced and the structure can be simplified.

〔Example〕

Hereinafter, the present invention will be described in detail based on embodiments shown in the drawings.

FIG. 1 is a perspective view showing an embodiment of the electrical/air circuit board according to the present invention, and FIG. 2 is a sectional view of the main parts. In these figures, 1 is a printed circuit board, 2 is a plate, and these constitute an electrical/air circuit board 3. Mounted on the surface of the printed circuit board 1 are a plurality of conversion units 4, a manifold 6 to which air piping 5 is connected, a connector 8 to which electrical wiring 7 is connected, and various electrical components 9 such as resistors. on the other hand,
The smooth part that avoids the raised part due to the formation of the electric circuit pattern on the back side of the printed circuit board 1 constitutes an air circuit part 10.
0 has an air hole 12 formed therethrough corresponding to the connection port 11 of the manifold 6.

The plate 2 has the air circuit section 1 on its surface.
A groove-shaped air circuit 14 is formed in a portion facing 0, and is fixed to the back surface of the printed circuit board 1 by adhesive or screwed with a gasket (not shown) in between, thereby connecting the air circuit 14 and the air hole 12.
We are trying to communicate with

That is, the present invention is characterized in that the printed circuit board 1 is commonly used as both the electric circuit board and the air circuit board of the conversion unit 4, and the two circuit boards are integrated. As a result, conventionally an electric circuit board and an air circuit board consisting of two air circuit forming plates were required, but in this invention, a printed circuit board is commonly used for both the electric circuit and the air circuit. , it is possible to manufacture an electric/pneumatic circuit board 3 by integrating both circuit boards with the printed circuit board 1 and the plate 2, and the plate for forming the pneumatic circuit can be made into one.
It is possible to reduce the number of sheets.

Furthermore, if the electrical/pneumatic circuit board 3 according to the present invention is used as a converter rack, a plurality of conversion units 4 can be installed, and if used as a motherboard, several to several dozen modules can be installed. It is possible. Furthermore, each conversion unit 4
Since there is no need for direct wiring or piping to the unit or module, the air piping 5 and the electrical wiring 7 can be centrally arranged at a location where work is easy to do, making maintenance and replacement of the unit easy.

FIG. 3 is a sectional view showing another embodiment of the present invention. In this embodiment, the plate 2 is formed of a metal plate, the air circuit 14 is formed on the plate 2 by pressing, etc., and then the plate 2 is adhesively fixed to the air circuit section on the back side of the printed circuit board 1. A plurality of setscrews 20 and nuts 21 are integrally connected.

FIG. 4 is a sectional view showing still another embodiment of the present invention. In this embodiment, a gasket 25 made of rubber or the like is interposed between the printed circuit board 1 and the plate 2, and instead of forming an air circuit in the plate 2, an air circuit 26 consisting of a through hole is formed in the gasket 25. Thus, it constitutes an electrical/air circuit board 3.

FIG. 5 shows yet another embodiment of the present invention, in which the plate 2 is made of die-casting or other casting material, and a threaded hole 30 for nipple connection communicating with the air circuit 14 is formed.

Note that the present invention is not limited to the above-mentioned embodiments, and can be modified in various ways. For example, if an electric circuit pattern is formed on the entire printed circuit board and it is difficult to secure an air circuit section, an extension section may be added to the printed circuit board in advance. It is sufficient to provide an extension part and use this extension part as an air circuit part.

[Effect of idea]

As explained above, the electric/pneumatic circuit board of the measuring instrument according to the present invention uses the same printed circuit board as the pneumatic circuit board, so it has a simple structure, can be miniaturized, and can be provided at low cost. Furthermore, since piping and wiring can be centrally arranged in a location where work can be easily performed, maintenance and replacement of the conversion unit are easy. The present invention can be widely applied not only to converters but also to motherboards of controllers, indicators, alarms, etc. that have input/output of electricity and air.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing one embodiment of the electrical/pneumatic circuit board according to the present invention, Fig. 2 is a sectional view of main parts, Fig. 3 is a sectional view showing another embodiment of the invention, and Fig. 4. 5 is a cross-sectional view showing still another embodiment of the present invention, and FIG. 5 is a cross-sectional view showing still another embodiment of the present invention. 1...Printed circuit board, 2...Plate, 3...
Electrical/air circuit board, 4... Conversion unit, 10... Air circuit section, 14... Air circuit.

Claims (1)

[Scope of utility model registration request] Avoid raised areas caused by forming electrical circuit patterns on electrical/pneumatic circuit boards of measuring instruments that use both electrical signals and air signals from I/P converters or P/I converters as input or output. An electrical/pneumatic measuring instrument characterized in that a smooth surface of a printed circuit board serves as an air circuit section, and a plate having an air circuit provided on a surface on the printed circuit board side corresponding to the air circuit section is closely fixed to the printed circuit board. circuit board.