JPS6215975B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a snap switch equipped with a movable contact plate that is swingably supported by a support base.

Snap switches have a contact switching configuration that is on/off, on/off/on with the neutral point off, and on/off/on where all three positions are on.
There are three basic types: on and on, but these three types differ not only in the shape of the movable contact plate that performs seesaw movement, but also in the shape of the support base that swingably supports the movable contact plate. Since they come in different shapes, it is becoming necessary to assemble and manage each type.

This conventional example is shown in FIGS. 1 and 2. on·
The on-type support stand A is as shown in Figure 2a,
The movable contact plate 6 is supported at the center by a central protrusion 2', and the movable contact plate 6 swings in response to the movement of the slider 7 to switch the contact. On/off/
The on-type support stand A has a pair of side protrusions 5' provided at equal distances on both sides from the center.
5' supports the movable contact plate 6, and when the slider 7 is located at the center, the movable contact plate 6 is
It is supported at one point so that both contacts do not come into contact with each other, and when the slider 7 moves, the contact in that direction turns on. The on-on-on type exists only in the two-pole or four-pole type, but the support base A is located at a position where the movable contact plate 6 is offset from the center to one side, as shown in Figure c. It is supported by side protrusions 5', and even when the slider 7 is located at the center, the movable contact plate 6 is in contact with one of the contacts.

To explain this on-on-on type 2-pole 1-circuit 3-position in more detail, in Fig. 8, a, b, and c represent each operating position, a is the position of the handle 8, and b is the position of the two poles. C indicates one pole, C indicates the other pole, the support base A of one pole is connected to one contact of the other pole, and the support base A in C serves as a common contact. If you now move the handle 8 to move the slider 7, it will move to the out ₁ contact point at a, the out 2 contact point at b, and the out ₂ contact point at c.
The out ₃ contact is energized.

As is clear from the above, in this type of conventional snap switch, a movable contact plate and a support stand must be prepared for each type.

Here, in Utility Model Application Publication No. 49-53271,
On/on type movable contact plate and on/off type
A device is disclosed that includes a support base that can accommodate an on-type movable contact plate. This has almost the same shape as the support base A shown in FIG. The central protrusion 2' is supported on both sides. In this case, although not described in the above publication, an on-on-on type can also be realized by supporting the movable contact plate 6 only on one side of the central projection 2'. However, with such a structure, the support point of the on-off-on type movable contact plate 6 is very close to the center, so the contact will switch with just a slight movement of the slider 7. The center position of the movable contact plate 6 is extremely unstable, and if stability is to be achieved by increasing the distance from the center of the movable contact plate 6 to the support point, then the dimensions of the support stand A itself should be It had to be made larger, and as a result, the switch as a whole also became larger.

The present invention was made in view of these points, and its purpose is that although it is necessary to prepare a movable contact plate according to the type, the support base, which is a member fixed to the body, is The object of the present invention is to provide a snap switch that requires only a single type and can provide stable operation regardless of the type.

The present invention will be explained below based on an illustrated embodiment. FIG. 3 shows a support stand A in an embodiment of the present invention.
It shows. Arch-shaped central protrusions 2, 2 are erected at the center on two opposing sides of the bottom plate 1, which has a through-hole 9 for terminal attachment in the center, and each side of these arch-shaped central protrusions 2, 2 Notch 3,
Guide protrusions 4, 4 are erected via 3.
On the remaining two sides, lateral projections 5, 5 are erected at both ends, respectively. The guide protrusion 4 is taller than the central protrusion 2, and the side protrusions 5 are one step shorter than the central protrusion 2 and taller than the bottom of the notch 3. Further, a space between the pair of side protrusions 5, 5 is cut out as an operating space for a movable contact plate 6 for an on-on-on type.

The support base A shown in FIG. 4 has a side protrusion 5 formed by bending the side edge of a guide protrusion 4, and is completely the same in shape as the embodiment described above. For the support base A configured in this way, each type can be obtained by simply replacing the three types of movable contact plates 6 described below.

Now, when the movable contact plate 6 shown in FIG. 5a is attached to the support base A, it becomes an on-on type. That is, the movable contact plate 6 used here has central receiving surfaces 10, 10 extending on both sides of the central portion, and side receiving surfaces 11, 11, 11, 11 on both sides of each central receiving surface 10, respectively. As shown in FIG. 6a, the central receiving surface 10 is positioned between the guide protrusions 4 of the support base A and supported on the central protrusion 2. Here, the side receiving surfaces 11 are in a positional relationship where they can freely come into contact with the side protrusions 5, but the side protrusions 5 are lower than the central protrusions 2, and the movable contact plate 6 supported by the central protrusions 2 When the slider 7 is located on either side of the center and the movable contact plate 6 is tilted, the side receiving surface 11 is moved to the side because it comes into contact with the contact earlier than with the side protrusion 5. It does not come into contact with the protrusion 5, but only contributes to stabilizing the see-saw movement of the movable contact plate 6 by being guided by the inner surface of the guide protrusion 4.

The movable contact plate 6 shown in FIG.
The projecting pieces 12, 1 are for on-type use and are located within the notches 3, 3 on both sides of the central projection 2 of the support base A.
2 on each side edge, and has a side receiving surface 11 adjacent to the protruding piece 12. Further, a locking recess 13 as a smooth concave surface is formed in the center. This movable contact plate 6 has a side receiving surface 11 placed on the side protrusion 5 and supported at two points equidistantly apart from the center, and a protruding piece 12 is located within the notch 3 and is movable. The movement of the contact plate 6 is restricted. As shown in FIG. 6b, when the slider 7 comes to the center of the movable contact plate 6, the slider 7 enters the locking recess 13, so that a stable neutral state is obtained.

Furthermore, the movable contact plate 6 shown in FIG. , one side receiving surface 1 for support base A
The movable contact plate 6 is made swingable by one side protrusion 5 on which the movable contact plate 6 rests, and can swing in the space between the other side protrusions 5. Since the movable contact plate 6 is supported at a position offset to one side from the center, even when the slider 7 is located at the center, the movable contact plate 6 maintains an inclined state and contacts one of the contacts. . Figure 6c has a circuit diagram with the slider 7 located in the center and connected to the out ₂ contact, but Figures 7a and b show the slider 7 on the right and left sides, respectively. The circuit diagram when moved to is shown.

As mentioned above, the present invention is an on-on type, by simply replacing the movable contact plate on a single support base.
It is possible to obtain each type of on-off-on type and on-on-on type, and there is no need to prepare a support stand for each type, making production, assembly, and inventory management easier. Of course, the on-off-on type movable contact plate and the on-on-on type movable contact plate are supported by two sides provided with central protrusions for supporting the on-on type movable contact plate. Since this is done using lateral protrusions provided on both ends of two different sides, the support points of both movable contact plates supported at lateral positions can be placed away from the center. In addition, it can be supported at the same position as the conventional example shown in FIGS. It is something that can be made certain.

[Brief explanation of the drawing]

Figure 1 a, b is a sectional view of the snap switch and a perspective view of the movable contact plate and support base, Figure 2 a, b, c
3 is a perspective view showing conventional support stands of each type.
The figure is a perspective view of a support base according to the present invention, Figure 4 is a perspective view showing another example of the support base, and Figures 5a, b, and c are perspective views of movable contact plates of each type used in the above. ,
Fig. 6 is an explanatory diagram of the same operation as above, Fig. 7 a and b are reference circuit diagrams of the on-on-on type mentioned above, and Fig. 8 is an explanatory diagram of the operation of the on-on-on type. In the support stand, 1 is a bottom plate, 2 is a central protrusion, 3 is a notch, 4 is a guide protrusion, 5 is a side protrusion, and 6 is a movable contact plate.

Claims (1)

[Claims] 1. A snap switch equipped with a movable contact plate and a support base combined with the movable contact plate, in which the support base that swingably supports the movable contact plate is erected from the center of each of the two opposing sides of the bottom plate. a pair of central protrusions, guide protrusions erected through notches on both sides of each central protrusion, and guide protrusions erected on both sides of the other two sides of the bottom plate, leaving an operating space for the movable contact plate in the center. This support base has three types of movable contact plates, i.e., a center receiving surface that is swingably supported at the upper end of the center protrusion of the support base between the guide protrusions, and a longitudinally central portion. a first movable contact plate provided on both sides of the board and swingably guided by opposing inner surfaces of the guide protrusions; a lateral receiving surface swingably supported at the upper end of each side protrusion on the two sides; a second movable contact plate having a protrusion disposed in the notch and swingingly guided by the opposing inner surface of the guide protrusion;
The inner surface of the opposing guide protrusion includes a side receiving surface that is swingably supported at the upper end of the side protrusion on one side of each side protrusion, and a protrusion disposed in the above-mentioned notch. 1. A snap switch characterized in that different operating modes can be obtained by combining any one of the third movable contact plates that are swing-guided.