JPS5933926B2 - lever switch - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a multi-directional lever switch, and more particularly to its return mechanism.

There are two operating methods for lever switches: an automatic return type in which the lever automatically returns to its original position when the operating force is removed after the lever is moved in the same direction to operate the contact, and the lever remains in its original position even after the operating force is removed. The lever switch is a manual return type in which the lever is returned to its original position by inputting an input when necessary while the switch is in a fallen position.First, the operation mechanism of an automatic return type lever switch suitable for carrying out the present invention will be explained.

In FIG. 1, a substantially hemispherical fixed seat 2 is fixed to a lever 1, and a movable seat 3 is provided below the fixed seat 2, which faces the fixed seat 2 and is movable up and down.

A spring 4 is disposed between the fixed seat 2 and the movable seat 3, the movable seat 3 is pressed against the inclined surface of the cam 5 having a guide groove, and the bent fixed seat 2 is pressed against the inner surface 7 of the case 6. There is.

Further, the cam 5 is supported from below by a holding plate 8 to prevent it from being pushed out by the force of the spring 4.

The tip 1a of the lever 1 is inserted into the hole 10 of the lower cam 9 attached under the holding plate 8, and a recess 12 including a cam surface 11 is provided on the lower surface of the lower cam 9, in which the lower cam is inserted. A push rod 14 is arranged to pass through a bottom plate 13 that supports 9.

A contact portion 15 is attached to the lower surface of the bottom plate 13 and is operated by a push rod 14 .

Note that 30 is a screw for attaching the presser plate 8.

The operation of the lever switch having such a configuration is as follows.

That is, when the lever 1 is tilted in the direction shown, for example, in the direction of the dotted line in the figure, the tip 1a of the lever 1 uses the fixed seat 2 as a fulcrum, is guided by the guide groove of the cam 5, pushes the lower cam 9 having the hole 10 laterally, and the lower cam 9 moves in that direction.

At this time, the cam surface 11 of the lower cam 9 pushes down the push rod 14 to operate the contact.

Furthermore, the movable seat 3 moves together with the lever 1 while sliding on the inclined surface 16 of the cam 5, resulting in the state shown in FIG. 2A.

At this time, the restoring force P1 of the spring 4 is applied to the inclined surface 16 of the cam 5 via the movable seat 3, as shown in the vector diagram in the figure, and its component force P2 becomes a force that tries to return to its original state. When the operating force of the lever 1 is removed, the movable seat 3 slides on the inclined surface 16 and returns to its original position, causing the lever 1 to return.

At this time, the push rod 14 also returns, and therefore the contact of the contact portion 15 also returns.

Next, in order to make the automatic return type lever switch of FIG. 1 a manual return type, a flat cam 5' (see FIG. 2B) may be used in place of the cam 5 with an inclined surface.

Figure 2B shows the manual return mechanism in operation. In this case, since there is no inclined surface, when lever 1 is pushed down, movable seat 3
slides on the upper surface 17 of the flat cam 5' and stops at the position shown in the figure.

At this time, the restoring force P3 of the spring 4 is applied to the upper surface 17 of the cam 5' via the movable seat 3, as shown in the vector diagram in the same figure, and its component force P4 is a force that prevents it from returning to its original state. Therefore, even if the operating force of the lever 1 is removed, the operating state is maintained.

To return lever 1, apply a greater operating force than P4.
and add in the opposite direction.

The operation of the tip 1a of the lever 1 and the lower cam 9 is exactly the same as in the case of automatic return.

In the above explanation, we talked about automatic return and manual return of lever switches, but lever switches are devices that open and close each contact by tilting the lever in each direction when operating many devices in a concentrated manner. , a single lever switch is often used with an automatic return type in one direction and a manual return type with the other direction.

FIG. 3 is an example of a cam body in which a four-way operating lever switch is combined with an automatic return cam and a manual return cam.

Further, the arrows in the figure indicate the operating direction of the lever, the direction A indicates automatic return, and the direction M indicates manual return.

In Figure 3, A is automatic return in all four directions, B is manual return in all four directions, C is automatic return in one direction and manual return in the other three directions, and D is manual return in only one direction and automatic in the other three directions. return,
E and F have automatic return in two directions and manual return in the other two directions.

In other words, there are a total of 6 four-way lever switches as mentioned above.
A combination of return mechanisms can be obtained.

Automatic return to direction, consisting of one four-way lever switch
For manual return in other directions, depending on the purpose, the position of the unoperated lever 1 may be set vertically to the inclined surface 1 shown in Figure 2A.
6 and the flat plate surface 17 shown in FIG. I needed to keep it.

Therefore, there is a drawback that not only is the large number of parts inconvenient, but also it is necessary to prepare a large number of molds for molding the cam.

The present invention aims to eliminate this drawback.

This purpose, according to the present invention, includes a lever pivotably supported by a case, a movable seat loosely fitted to the lever and biased by a spring, and a guide groove formed in multiple directions from the return position of the lever. The cam surface along the guide groove against which the movable seat urged by the spring is pressed has a manual return cam and an automatic return cam consisting of a flat plate surface and an inclined surface, and is attached to the case by a holding plate. In a lever switch equipped with a supported cam body, the cam body has a flat manual return cam having guide grooves formed in multiple directions, at least one guide groove, and an inclined surface along the guide groove. The lever is divided into automatic return cams, and the cam body is configured by selectively overlapping the automatic return cam on the upper surface of the manual return cam, so that manual return or automatic return of the lever can be arbitrarily determined. This is achieved by

The automatic return cam has guide grooves formed in multiple directions and inclined surfaces along the guide grooves, and has a disc-shaped cam connection that is divided into one guide groove and an inclined surface along the guide grooves. It is best to cut an appropriate number of pieces from the body.

Further, it is also possible to integrally mold the cam presser plate for manual return.

Next, one embodiment of the present invention will be described in detail based on the drawings.

4A to 4C show the parts of the cam body constituting the return mechanism of the four-way lever switch according to the present invention, FIG. 4A is a perspective view of the cam connection body of the automatic return cam, and FIG. 4B is a manual Figure 4C is a perspective view of the return cam, Figure 4C is a sectional view of the main parts of a cam body that combines an automatic return cam and a manual return cam, and Figure 4 is a side sectional view of the operating mechanism of the lever inch. be.

In FIG. 4A, the cam coupling body 5b of the automatic return cam is provided with a lever guide groove 18 and an inclined surface 16 along the guide groove in four directions from the center. 5b is further drilled with a deep dividing groove 19 so as to be divided into four parts in each direction, and each section, that is, each cam 5b1 to 5b, is divided into four parts.
4 are connected by a membrane 20 at the bottom.

Further, on the lower surface 21 of each section, there is a boss 22 with a chamfered tip for combination with a manual return cam.

Next, in FIG. 4B, the manual return cam 5a has a substantially flat plate shape with a mounting flange 23 around the bottom, and a cross-shaped guide groove 24 passing through the center of the cam 5a.

Also, bosses 2 of the automatic return cams 5b1 to 5b4 are provided on the upper surface.
A hole 25 into which 2 is fitted is bored.

The automatic return cams 5b1 to 5b4 and the manual return cam 5
In order to obtain the six types of cams shown in Fig. 3 by combining ``a'', insert a knife into the thin film portion 20 of the cam connecting body 5b of the automatic return cam in the direction in which manual return is desired. The cam body may be constructed by stacking the boss 22 on top of the manual return cam 5a so that the boss 22 fits into the hole 25.

This situation is shown in FIGS. 5 and 6.

Fig. 5 is a plan view of a cam cut out in appropriate numbers from the cam connection body of the automatic return cam, and Fig. 6 is a cam constructed by stacking the automatic return cam shown in Fig. 5 on top of the manual return cam. In the plan view of the body, A j B in Figures 5 and 6? C corresponds to each.

In Fig. 6, in A, only one direction where the automatic return cam 5b1 is arranged is automatic return, and the other is manual return, and in B, only one direction in which the automatic return cam 5b1, 5b2, 5b3 is not arranged. Manual return, others automatic return, C
In this case, the two directions in which the automatic return cams 5b1 and 5b2 are arranged are automatic return, and the other two directions are manual return.

These combinations satisfy C, D, and F in FIG. 3, respectively.

Other combinations can be made as well. Note that the remainder of the section cut out from the cam coupling body 5b of the automatic return cam in Fig. 4A to make the automatic return section can be used as the automatic return cam of another lever switch, so there is no waste. .

The fourth figure is a side sectional view of the operating mechanism of the lever switch according to the present invention, and in the figure, the same parts as shown in FIG. 1 are denoted by the same reference numerals.

The difference in the fourth drawing from that in FIG. 1 is that one automatic return cam 5 is cut from the cam connection body 5b of the automatic return cam.
The point is that a cam body is provided in which b1 is superimposed on the manual return cam 5a.

Therefore, in the lever switch according to the present invention shown in the fourth diagram, when the lever 1 is operated in the direction shown by the dotted line, automatic return occurs, and when the lever 1 is operated in the direction opposite to the direction shown by the dotted line, manual return occurs.

In the above example, an appropriate number of automatic return cams are cut out from the cam connection body of the automatic return cam, but the invention is not limited to this. For example, automatic return cams can be made one by one and placed on the manual return cam. An appropriate number of layers may be stacked.

The manual return cam 5a is made of the same material as the holding plate 8 shown in FIG. By assembling as shown, you can reduce the number of lever switch parts.

As is clear from the above description, according to the present invention, one type of automatic return cam (or a cam connection thereof) and a manual return cam are prepared, and the automatic return cam is applied as necessary. By overlapping several manual return cams, it is possible to assemble any lever switch that automatically returns or manually returns in a desired direction.

In addition, although the above-mentioned embodiment takes a four-way lever switch as an example, the idea of the present invention is not limited to this, but it goes without saying that it extends to other multi-directional lever switches.

[Brief explanation of the drawing]

Figure 1 is a side sectional view of the operating mechanism of a conventional lever switch equipped with a cam, Figure 2A explains the operation of the automatic return mechanism of the lever switch, and Figure 2B explains the operation of the manual return mechanism. FIG. 3 is a configuration diagram showing an example of a combination of the return mechanism of the lever switch, FIG. 4 and the following are diagrams related to the lever switch according to the present invention, and FIG. A perspective view of the cam connection body, FIG. 4B is a perspective view of the manual return cam, FIG. 4C is a cross-sectional view of the main parts of the combination of the automatic return cam and the manual return cam, and the fourth figure is the lever switch. Fig. 5 is a plan view of the automatic return cam, and Fig. 6 is a side sectional view of the operating mechanism of the cam.
A plan view showing the state in which the cams shown in the figure are stacked, FIG. 7 is a perspective view of the manual return cam and the presser plate integrated, and FIG. 8 is a view of the cam and presser plate of FIG. 7 integrated. FIG. 3 is a side sectional view of the operating mechanism section of the lever switch using the lever switch. 1...Lever, 2...Fixed seat, 3...
...Movable seat, 5a...Manual return cam, 5
b...Automatic return cam connection body, 5b1 to 5b4
...Hanging return cam, 8...Press plate, 1
0, 25... Hole, 16... Inclined surface, 1
7... Horizontal surface, 18, 24... Guide groove, 19... Division groove, 20... Thin film, 2
2...Boss.

Claims (1)

[Scope of Claims] 1. A lever that is pivotably supported by a case, a movable seat that is loosely fitted to the lever and biased by a spring, and a guide groove that is formed in multiple directions from the return position of the lever. The cam surface along the guide groove against which the movable seat urged by the spring is pressed has a cam for manual return and a cam for automatic return consisting of a flat plate surface and an inclined surface, and is supported on the case by a holding plate. A lever switch equipped with a cam body, in which the cam body is a flat plate-shaped manual return cam having guide grooves formed in multiple directions, an automatic lever switch having at least one guide groove, and an inclined surface along the guide groove. The lever is divided into return cams, the cam body is configured by selectively overlapping the automatic return cam on the upper surface of the manual return cam, and scales are provided to arbitrarily determine manual return or automatic return of the lever. lever switch. 2. In the lever switch according to claim 1, the automatic return cam has a guide groove formed in multiple directions and an inclined surface along the guide groove, and has one guide groove and this guide groove. A lever switch characterized in that it is made by cutting an appropriate number of pieces from a disk-shaped cam connection body that is divided into sections for each inclined surface exposed to the wind. 3. The lever switch according to claim 1, wherein the manual return cam and the presser plate are integrally molded.