JPS6331885B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a contact structure of a slide type switch, and more particularly to a slide type switch in which energization to two or more circuits is switched by sliding one slider. This invention relates to an improvement in the contact structure.

Conventionally, the contact structure of this type of slide type switch has been known, but the basic principle is that as shown in FIG. One of the conductive terminals 6 and 7 is selectively brought into conductive contact to switch the current supply to the two electric circuits connected to the conductive terminals 6 and 7.

Therefore, the slider 8 is always in contact with the common terminal 5, but it repeats contact and non-contact with the conductive terminal 6 or 7 every time the circuit is switched on and off, so that it is difficult to turn on the current to the circuit. At the moment when a sudden current change occurs due to interruption, an arc occurs exclusively at the interface between the insulation patterns between the conductive terminals 6 and 7. For this reason, the insulation pattern between the conductive terminals 6 and 7 deteriorates, that is, the insulation properties of the insulation pattern deteriorate, and since the insulation pattern is very thin, the conductive terminals 6 and 7 may be shot. Ta.

The present invention has been made in view of the above circumstances, and it is possible to prevent the deterioration of the insulation pattern between the conductive terminals and eliminate shorts between the conductive terminals, and to provide a highly reliable and long-life slide. The purpose is to provide a type switch.

In order to achieve the above object, the present invention provides a plurality of conductive terminals that are mutually insulated and separated by a plurality of insulating patterns and are connected to one end of each of a plurality of corresponding circuits, and a plurality of conductive terminals that are connected to one end of each of a plurality of corresponding circuits. one common terminal commonly connected to the other end;
a slider that is slidably operated to selectively bring the common terminal into conductive contact with one of the conductive terminals;
In a slide type switch that selectively switches energization to two or more circuits, when switching energization to the switch, before the slider comes into non-contact with the conductive terminal to be cut off, , the circuit that is in the energized state is opened by coming into a non-contact state with the common terminal, and before the slider comes into contact with the common terminal, it comes into contact with the conductive terminal to be energized next. An insulating portion is provided on the common terminal side facing the insulating pattern on the conductive terminal side so as to close the circuit to be energized.

Hereinafter, one embodiment of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 2 shows a first embodiment of the present invention, in which 1 is a common terminal, 21 and 22 are conductive terminals connected to different circuits, and the slider 8 is Connect the insulation pattern 4 and the insulation part 31
By sliding from the OFF position (indicated by the two-dot chain line) in the C or D direction, the common terminal 1 and the conductive terminals 21 and 22 are selectively electrically connected, and the respective terminals 21 and 22 are electrically connected to each other. It alternately opens and closes two circuits connected to the

The insulating pattern 4 that insulates and separates the conductive terminals 21 and 22 from each other is formed by exposing the insulating substrate as it is or by fitting an insulating plate into the conductive plate.

Reference numeral 31 denotes an insulating part provided on the common terminal side, and in the illustrated example, it is constructed by cutting out a part of the common terminal 1.

The insulating part 31 is provided facing the insulating pattern 4 that insulates and separates the conductive terminals 21 and 22 from each other, and is located above the insulating pattern 4 in the direction of movement of the slider 8 during switching operation. It has a wide width at the bottom, that is, it is slightly closer to the C direction than the extension of the boundary line of the insulating pattern 4 to the conductive terminal 21, and slightly closer to the D direction than the extension of the boundary line of the insulating pattern 4 to the conductive terminal 22. It has a structure with upper and lower boundaries.

15, due to the presence of the insulating part 31, the common terminal 1
This is a bypass circuit section to prevent the conductive parts of the circuit from being separated from each other. This bypass circuit 15
is not limited to the example shown. As shown in Figure 6,
Conductive portion 1 of the common terminal separated by an insulating portion 35
3 and 14 may be connected by a conductive wire 15', in short, the conductive portions 13 and 14 of the common terminal 1 are electrically connected to each other and form one common terminal from an electrical point of view. It's good to have it.

FIG. 3 is a diagram showing a second embodiment of the present invention, in which a cutout portion 34 having stepped portions 36 and 37 is provided in the common terminal 11 to form an insulating portion. Such an embodiment is suitably applied to a slide type switch in which two contacts are provided on each portion of the slider 8 that contacts each terminal to improve the reliability of the switch. If such cutout steps 36 and 37 are provided, the generated arc can be dispersed by connecting and disconnecting with the common terminal side in stages, as is clear from the operating principle of the present invention described later. It is effective.

FIG. 4 is a diagram showing a third embodiment of the present invention, in which three circuits are opened and closed. 4, 4 are three conductive terminals 21, 22, 2
an insulating pattern for insulating and separating 3 from each other, 32, 3;
Reference numeral 3 denotes a notch portion that constitutes an insulating portion provided in the common terminal 1.

Next, in order to further facilitate understanding of the present invention, the operating principle of the slide type switch of the present invention will be explained using a second embodiment.

When the switch is OFF, the slider 8 is in the position shown in FIG. 3, but when the slider 8 is moved in the E direction from this state, the third and fourth contacts 8
3 and 84 immediately come into contact with the conductive terminal 21, but
The first and second contacts 81 and 82 are in a non-contact state, and when the slider 8 is further moved in the E direction, the first contact 81 comes into contact with the common terminal 11. Since the circuit is closed at the time, an arc is generated in this part, but when the second contact 82 comes into contact, the circuit is not opened or closed and no arc is generated.

Furthermore, when returning from this state in the opposite direction, the moment the second contact 82 is released, there is no opening or closing in the circuit, so no arc is generated in this part, and the first contact 81 is no longer in contact. The moment the release occurs, the circuit is opened and an arc is generated in this area. In other words,
No arc occurs in the second contact 82 portion.

In short, arcs do not occur on the conductive terminal 21 side, and arcs occur only at the common terminal 1.
Since it is only the part that contacts the first contact 81 of 1,
Deterioration of the insulation pattern 4 between the conductive terminals 21 and 22 is prevented, and the problem of shorts between the conductive terminals 21 and 22 is solved. Incidentally, an arc occurs on the common terminal 11 side and the insulating part 31 deteriorates, but since the common terminal 11 is originally kept conductive, even if the insulating part 31 deteriorates, it does not cause much problem.

In addition, in the case of the second embodiment (FIG. 3), the arc occurs only in the first contact 81 (portion with a small insulation width), and in the second contact 82 (the part where the insulation width is small). Since arcs do not occur in the wide insulation width portions, the problem of poor contact between the common terminal 11 and the slider 8 does not occur.

It will be easily understood that even when the slider 8 is slid in the F direction, an arc is generated on the common terminal side and not on the conductive terminal 22 side based on the same principle. FIG. 5 is a diagram explaining the above operating principle, and the vertical axis shows the connection/disconnection relationship between each contact and the slider (the height of the diagram indicates the connection/disconnection state with the slider 8, respectively. ), and the horizontal axis shows the position of the slider.

As is clear from the above explanation, according to the present invention, since the structure is such that the arc that occurs when opening and closing the circuit is not generated on the conductive terminal side but on the common terminal side, the insulation pattern between the conductive terminals is This can effectively solve the problem of conductive terminals being shot together due to deterioration due to arcing. Therefore,
A slide type switch with high reliability and long life can be realized.

It goes without saying that the present invention can be realized in various modifications other than those shown in FIGS. 2 to 4 and 6.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing the contact structure of a conventional slide type switch, FIG. 2 is a diagram showing an embodiment of the present invention, FIG. 3 is a diagram showing a second embodiment of the present invention, and FIG. 4 is a diagram showing a second embodiment of the present invention.
FIG. 5 is a diagram showing a third embodiment of the present invention.
FIG. 6, which is a diagram showing the principle of operation of the embodiment shown in the figure, is a diagram showing another modification of the common terminal. (Explanation of symbols), 1, 11, 12, 13, 14,
5... Common terminal, 21, 22, 23, 6, 7...
Conductive terminal, 4... Insulation zone, 31, 32, 3
3, 34, 35...Insulating section, 8...Slider.

Claims (1)

[Claims] 1. A plurality of conductive terminals that are mutually insulated and separated by a plurality of insulating patterns and are connected to one end of each of the plurality of corresponding circuits, and a plurality of conductive terminals that are common to the other ends of the plurality of circuits. A slider is provided with one common terminal connected to the conductive terminal, and a slider that is slid to selectively bring the common terminal into conductive contact with one of the conductive terminals, and selectively switches energization to two or more circuits. In a slide type switch that is configured to perform the energization all at once, when switching the energization of the switch, the slider comes into a non-contact state with the common terminal before the slider comes into a non-contact state with the conductive terminal to be de-energized. and, before the slider comes into contact with the common terminal, contact the conductive terminal to be energized next and close the circuit to be energized. A contact structure for a slide type switch, characterized in that an insulating part is provided on the common terminal side opposite to the insulating pattern on the conductive terminal side.