JPS5882420A - Switch - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a switch configured to select one fixed contact from a group of fixed contacts arranged in a vertical and horizontal grid.

A well-known switch of this type has a structure in which pins attached to the ends of lead wires are inserted into pin jacks arranged in a grid pattern.

However, since switches with this type of structure are large in size, it is difficult to mount them on a printed circuit board together with small electronic components such as semiconductors, resistors, and capacitors. It has the disadvantage that the work of replacing it with a pin jack is complicated.

The present invention has been made to solve the above-mentioned drawbacks.
The purpose is to provide a switch that is small and easy to operate, and is particularly useful for use in ultra-high frequency applications, such as variable delay line delays that adjust the pulse delay time in ultra-high-speed pulse circuits, which have large dimensional constraints. This type of variable delay line, which is the most suitable switch for the time selection mechanism, is placed on a printed circuit board with other semiconductor components and is limited by both its area and height. Switches used in variable delay lines have multiple contacts and are required to have an extremely simple and compact structure.

The details of the present invention will be explained below with reference to the drawings.

Figure 0 shows an embodiment of the switch of the present invention, and shows an example applied to an ultra-high-speed variable delay line. Relevant parts are shown in cross-section.

In the figure, a conductive line oFi formed in a zigzag shape is bent into a U-shape and adhered to the opposing main surfaces and one side surface (upper surface in the figure) of a plate-shaped magnetic bobbin ◎ to constitute an inductance element.

On the other side of the plate-shaped magnetic bobbin 0 (lower surface in the figure), a capacitive element is arranged in which dielectric plates @, o, which form the capacitive electrode 0, are integrated back to back with the ground electrode O sandwiched between them. ,
Connection piece 0 protruding from the conductor line 0 of the inductance element
and the capacitive electrode [phase] are connected to form a delay line element (2).

The conductive path near one side of the plate-shaped magnetic bobbin 0 in this delay line element is wide, and the conductive path on the side serves as a fixed contact (2). Note that the symbol ■ is an open fixed contact.

Also, the dielectric plate 0. o The grounding electrode 0 on the inner surface is connected to the grounding plate O placed on the inner bottom surface of the casing.
It is connected to the ground terminal [phase] planted on the bottom of the

The number of fixed contacts ■ on the delay line element ■ is 20, but the number ■
Only four are shown in the partial front view of FIG.

Two delay line elements ■ and ■ are sandwiched between three external magnetic plates [phase], ■, and @ (shown only in the partial side view of Figure ■■) that are wider than the plate-like magnetic bobbin ■. In addition, a sliding groove O is formed with the surface of the fixed contact (2) and the open fixed contact (0) as the bottom and the inner wall of the external magnetic plate Φ as the side wall.

Two delay line elements are arranged in parallel in the figure, but four are arranged in parallel, and the external magnetic plate @ is the delay line element ■, and between 0 and 0, one plate is used for both delay line elements. There is. The external magnetic plate ■ electrically increases the inductance of the inductance element and also increases the delay line element arranged in parallel.
It also functions as a magnetic shielding plate to prevent harmful coupling between the magnets and harmful interference with external circuits.

As is clear from the above description, the number of sliding grooves (2) is equal to the number of delay lines arranged in parallel, and one conductive sliding member (2) is movably inserted into each sliding groove (2). The blind hole (2) of the sliding body (2) accommodates a slider (2) consisting of a coiled spring whose circumferential surface protrudes from the blind hole (2). This slider (■) can press the sliding body (■) and the fixed contact (■), and is made of a spring wire material with good conductivity, such as beryllium copper wire.
The surface is plated with metal such as gold.

In addition, another coil spring ■ is housed in the other blind hole ■ of the sliding body ■ in the vertical direction in the figure, and the tip of the fill spring ■ has an insulating taste ■ larger in diameter than the four parts ■ between the fixed contacts. The sliding surface formed by the fixed contact (2) and the recess (3) can be biased through the contact (2).

The upper surface of the sliding hole O is in contact with a conductive sliding piece (2) formed on the lower surface of the upper plate of the housing (2) and serving as a common electrode for each sliding member (2).

Furthermore, a plurality of through grooves (phases) along the sliding grooves O are provided on the upper plate of the housing (2). The upper part of the sliding body ■ has a thin groove ■ covered with a cover made of resin material, etc., and the transparent groove [phase]
The width of is narrower than the width of the sliding body ■ and wider than the width of the knob ■, and the sliding body ■ inserted into each sliding groove ■ with the knob ■ protruding from the transparent groove 0 can be gripped without falling off to the outside. 0
It is configured to be movable. The insulating member (2) is biased by a coil spring (2), and when it is recessed in the four parts (2), it does not produce a click feeling, making it possible to position the sliding member (2).

The diameter of the spring of the slider ■ is larger than the distance between the bottom of the blind hole ■ of the slider and the fixed contact 0, and the slider ■ is deformed and biased by the pressure in the diametrical direction of the coil spring. Contact both the fixed contact (■) and the sliding body (■) with appropriate contact pressure to establish conduction. Note that the slider ■ is arranged so that the slider ■ is in contact with the fixed contact ■ adjacent to the fixed contact that the insulation taste ■ contacts at the position where the insulation taste (≦) is recessed in the four parts ■.

In addition, the spring ■ that energizes the insulating element ■ also works to counteract the contact pressure between the -L surface of the sliding body ■ and the sliding piece ■, so that the fixed contact ■ selected by the positioning mechanism described in 1. One is a slider ■ and a sliding body ■ as a fixed connection contact.

It is electrically led out to the external circuit via the sliding piece (2) and the lead wire (O) through the output terminal hole planted on the bottom of the housing (2).

If slider C) is positioned such that slider ■ is above open fixed contact 0, fixed contact ■ will not be selected.

FIG. 0 is a top view showing a switch of the present invention using four sliding bodies (1).

Next, the operation of the switch of the present invention constructed as described above will be described using an example of how to select a delay time using a variable delay line.

When each delay line element (2) is set to be a delay line of Ins, a total of 20 fixed contacts (2) are provided every 50 pS. If four delay line elements υ arranged in parallel are successively connected in cascade, a total delay line of 4 ns is obtained.

That is, the variable delay line is configured as a variable delay line having a total of 80 fixed contact groups, 4 columns with 20 contacts in each row. Therefore, as a variable delay line, by sliding the sliding body
This means that 80 stages of delay time can be selected every 0 ps.

For example, the sliding body ■ above the first delay line element ■ is 50 ps~
A delay time of 1 ns is selected exclusively, and the slider ■ on the second delay line element ■ is selected exclusively for a delay time of 1.05 ns to 4 ns, and the following third and fourth delay line elements ■, @
The upper sliding bodies ■ and ■ are each 2.051 S ~ 3 ns,
Since it is possible to select a dedicated delay time of 3.05 ns to 4 ns, select the fixed contact ■ for which only one of the four sliding bodies ■ has the desired delay time, and the remaining three
If the sliding bodies ■ are placed on the open fixed contacts ■ at both ends of each delay line element ■, then the
A switch that can set any delay time for each Qps is obtained.

In the example shown in Figure 0, among the knobs at the top of the four transparent grooves [phases], knob 0 selects the delay time, and knobs 0' and 0'' indicate an example in which no delay time is selected. ing.

According to the inventor's experiments, the variable delay line of the embodiment shown in FIG. 0 and FIG. 5.5m
m, the height is 6 cm including the tip of the knob, and the height is 6 cm, including the tip of the knob.
The size is similar to that of a fathom pin DIP package. As a result, the switch of the present invention can be placed on a printed circuit board together with semiconductor components, etc., and has extremely high practical value.The switch of the present invention can also be used to switch variable delay lines in an extremely small size. The selection operation has become easier.0 The present invention is also effective for applications other than variable delay lines, and the number of columns is 2.
It is effective in all cases where there are more than one column and two or more stages.

Note that the sliding member (2) in the switch of the present invention can also be implemented with another structure having a known movable contact that slides on a fixed contact.

As explained above, the switch of the present invention includes a fixed contact group in which a plurality of fixed contact rows each consisting of an open fixed contact and a plurality of connected fixed contacts are arranged, and a fixed contact group arranged in each fixed contact row and in the fixed contact row. It is equipped with a conductive sliding body that slides on the top and a common electrode that is in electrical contact with each of the sliding bodies, and it is possible to select one fixed contact from a group of fixed contacts, so it has a large number of switching contacts. However, it has the advantage of being small, simple in structure, and easy to switch.

[Brief explanation of the drawing]

Figures ■ and ■ are a partial front view and a partial side view showing one embodiment of the switch of the present invention, and Figure 2 is a top view of the switch of the present invention. ■・・・Fixed contact, ■・・・Sliding body,
■...Curved portion, ■...Common electrode, 6E)...Casing, 0...Sliding groove, ■...Through groove, @...
...External magnetic plate, ■...Open fixed contact, ■...
...Delay line element patent applicant Elmec Co., Ltd.

Claims (1)

[Claims] A fixed contact group k in which a plurality of fixed contact rows each consisting of an open fixed contact and a plurality of connected fixed contacts are arranged, and a conductive sliding body that is arranged in each fixed contact row and slides on the fixed contacts of the fixed contact row. and a common electrode that is in electrical contact with each of the sliding bodies, making it possible to select one fixed contact of the fixed contact group.