JPH0346451Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a matrix switch device, and more specifically, to an improvement of a device using a reed switch as a switch element.

<Prior Art> As shown in FIG. 2, a type of matrix switch device includes first wiring patterns LA arranged in a horizontal direction on one surface of a printed wiring board.
and a second array formed along the vertical direction on the other surface.
There is a structure in which each intersection with the wiring pattern LB is selectively connected by a reed switch 3.

FIG. 1 is a conceptual block diagram showing an example of a switch unit used in such a conventional device, and shows an example of three contacts. In FIG. 1, a wound excitation coil 2 is arranged on a base 1, and a reed switch 3 is installed inside the excitation coil 2.
1 to 33 are inserted and fixed. Also, base 1
Pins 41 to 45 and 46 to 48 for connecting the excitation coil 2 and reed switches 31 to 33 to the outside are arranged near both ends of the base 1 so as to protrude from the base 1 and are substantially parallel to each other. Both ends of the excitation coil 2 are connected to pins 4 at both ends of one pin row.
1, 45, reed switches 31 to 33
One end of the reed switch 31-33 is connected to pins 42-44 of one pin row, and the other end of the reed switch 31-33 is connected to pins 46-48 of the other pin row.

In such a configuration, by controlling the application of the excitation signal to the excitation coil 2, opening and closing of the contacts of the reed switches 31 to 33 can be controlled.

FIG. 3 is a configuration explanatory diagram showing an example of a conventional device using the switch unit shown in FIG. 1. Third
In the figure, LC and LD are signal lines for exciting the excitation coil 2 of each switch unit, TH is a through hole that electrically connects the wiring patterns on both sides, and LE and LF are wired with one end connected through the through hole TH. This is a branch pattern that is connected to patterns LA and LB, and the other end is connected to the pin of the switch unit.

<Problems to be solved by the invention> However, according to such a conventional configuration, through-holes TH and branch patterns must be provided on the printed wiring board, making it difficult to increase the mounting density of the switch units. be.

The present invention focuses on these problems, and its purpose is to provide a matrix switch device that can be mounted at high density.

<Means for Solving the Problems> The present invention to solve such problems consists of forming a plurality of groups of first wiring patterns LA in a unit group of a plurality of wires along the lateral direction on one surface, and A plurality of signal lines LC and LD for exciting the excitation coil are formed, and a plurality of groups of second wiring patterns LB are formed along the vertical direction on the other surface, with a plurality of signal lines equal to the first wiring pattern as a unit group. The formed printed wiring board, a plurality of reed switches equal to the number of wiring patterns of each unit group of this printed wiring board, and an excitation coil into which these reed switches are inserted and fixed are mounted on the base as a reed relay. The base includes pins 46 to 48 that connect one end of each reed switch and each first wiring pattern LA of the printed wiring board, and L-shaped pins 46 to 48 that connect one end of each reed switch to each first wiring pattern LA of the printed wiring board, and L-shaped pins 46 to 48 that connect one end of each reed switch to the other end of each reed switch. A pin 42 connecting the other end of the wiring pattern or lead wire to each second wiring pattern LB of the printed wiring board.
Pins 41 and 45 are arranged in directions orthogonal to each other, and pins 41 and 45 connect each end of the excitation coil to the signal lines LC and LD of the printed wiring board.
Wiring patterns LA, LB are arranged in a direction orthogonal to pins 2 to 44, and are arranged at the intersections of each group of first and second wiring patterns LA and LB of the printed wiring board, to which each pin 41 to 48 corresponds, respectively. and signal line
It is characterized by consisting of multiple switch units connected to LC and LD.

<Function> The switch unit used in the present invention is arranged so that the connection parts that connect the reed switch and the outside are perpendicular to each other, corresponding to the intersections of the matrix wiring, so that the matrix wiring pattern of the switch unit and the printed wiring board is and can be directly connected without intervening through holes or branch patterns.

<Example> Hereinafter, an example of the present invention will be described in detail using the drawings.

FIG. 4 is an explanatory diagram of the pin arrangement of one embodiment of the switch unit used in the present invention, and parts equivalent to those in FIG. 1 are given the same reference numerals. In FIG. 4, near both ends of the base 1 are pins 41 and 45 for connecting both ends of the excitation coil to the outside, and a pin 4 for connecting one end of the reed switch to the outside.
6 to 48 are arranged substantially in parallel as in FIG. 1, but pins 42 to 44 for connecting the other end of the reed switch to the outside are arranged in a direction perpendicular to the arrangement direction of pins 46 to 48. ing.

FIG. 5 is a configuration explanatory diagram showing an example of the printed wiring board 5 used as the base 1 in FIG. is provided, and the other end is provided with a through hole 5 for inserting pins 46 to 48.
6 to 58 are provided, and a pin 42 is provided near one side so as to be perpendicular to the arrangement direction of the through holes 56 to 58.
Through holes 52 to 54 are provided for inserting through holes 52 to 44. Then, substantially L-shaped wiring patterns P1 to P3 are provided on the surface, with one end connected to the lead wire at one end of the reed switch to be arranged and the other end connected to the through holes 52 to 54. There is.

These are assembled as a switch unit as follows. First, the pins 41 to 48 are inserted and fixed into the through holes 51 to 58 of the printed wiring board 5, respectively. Then, install the reed switch 31 inside.
~ 33 is inserted and fixed to the excitation coil 2,
Connect both ends of the excitation coil 2 to pins 41 and 45,
One end of the reed switches 31 to 33 is connected to the end of the wiring patterns P1 to P3, and the reed switch 31
-33 are connected to pins 46-48. 6th
The figure shows a partial sectional view of a reed relay constructed in this manner. Note that the switch unit is housed in a case, but the case is not shown.

FIG. 7 is a configuration explanatory diagram showing an embodiment of the present invention, and the same parts as in FIG. 3 are given the same reference numerals. In FIG. 7, switch units configured as shown in FIGS. 4 to 6 are arranged at each intersection of the matrix wiring so that the wiring patterns corresponding to each pin overlap, and each switch unit is The pins are directly connected to corresponding wiring patterns in the matrix wiring.

This eliminates the need for through holes and branch patterns as shown in FIG. 3, making it possible to greatly simplify the wiring pattern and increase the packaging density of the switch units.

In addition, in the above embodiment, an example was shown in which the reed switch and the pin were connected by a wiring pattern, but the eighth embodiment
Connections may be made with lead wires as shown in the figure.

Further, the base is not limited to a printed wiring board, and may be a bakelite substrate, a ceramic substrate, or the like.

Further, the number of reed switches is not limited to three, and may be increased or decreased depending on the number of wiring patterns constituting a unit group of matrix wiring.

<Effects of the invention> As explained above, according to the invention, a matrix switch device that can be mounted at high density can be realized, and the practical effects are great.

[Brief explanation of the drawing]

Fig. 1 is a conceptual configuration diagram showing an example of a switch unit used in a conventional device, Fig. 2 is an explanatory diagram of a scanner using a switch unit, and Fig. 3 is an illustration of a scanner using a switch unit.
Figure 4 is an explanatory diagram of the configuration of a conventional device using the switch unit shown in the figure, Figure 4 is an explanatory diagram of the pin arrangement of an embodiment of the switch unit used in the present invention, and Figure 5 is a diagram of the printed wiring board used as the base of Figure 4. FIG. 6 is a partial sectional view of a switch unit used in the present invention, FIG. 7 is a configuration explanatory diagram showing an embodiment of the present invention, and FIG. 8 is a diagram showing another switch unit used in the present invention. FIG. 3 is a partial cross-sectional view of the unit. 1...Base, 2...Exciting coil, 3...Reed switch, 4...Connection part (pin), 5...Printed wiring board, LA, LB...Matrix wiring pattern.

Claims (1)

[Claims for Utility Model Registration] A plurality of first wiring patterns LA are formed in a unit group of a plurality of wires along the lateral direction on one surface, and a plurality of signal wires LC for exciting an excitation coil; A printed wiring board on which an LD is formed and a plurality of groups of second wiring patterns LB are formed along the other surface in the vertical direction with a plurality of second wiring patterns LB having the same number as the first wiring pattern as a unit group; A plurality of reed switches equal to the number of wiring patterns of each unit group and an excitation coil into which these reed switches are inserted and fixed are mounted on a base as a reed relay. Pins 46 to 48 connecting each first wiring pattern LA of the printed wiring board and the other end of an L-shaped wiring pattern or lead wire whose one end is connected to the other end of each reed switch and the printed wiring board. Pin 42 connecting each second wiring pattern LB of
Pins 41 and 45 are arranged in directions orthogonal to each other, and pins 41 and 45 connect each end of the excitation coil to the signal lines LC and LD of the printed wiring board.
Wiring patterns LA, LB are arranged in a direction orthogonal to pins 2 to 44, and are arranged at the intersections of each group of first and second wiring patterns LA and LB of the printed wiring board, to which each pin 41 to 48 corresponds, respectively. and signal line
A matrix switch device comprising a plurality of switch units connected to LC and LD.