JPS594409Y2 - SWITSUCHISOCHI - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an improvement of a switching device such as a changeover switch used in a distribution box, for example.

Fig. 1 shows a conventional device, in which 1 is a cylindrical base, 2 is a pedestal fixed to the bottom of this base, 3 is a knob, 4 is a tightening ring for fixing this knob to the base 1; 5 is a cam that is screwed 6 to the knob 3 and has a groove 51 in its lower part; 7 is a guide groove that is inserted into the groove 51 and carved on the inner wall of the base 1;
8 is a push rod that comes into contact with this pin; 9 is a spring that biases this push rod upward; 10 is a spring provided at the lower end of the push rod 8; 11 is a lever that abuts this spring and is pivotally supported by the switch mount 12; 13 is a microswitch that is attached to the switch mount 12 and has a pressing portion 131 that abuts the lever 11; 14 is a rubber gasket; and 15 is an insulator. It's a barrier.

The conventional device is constructed as described above, and when the knob 3 is turned in the state shown in FIG. 1, the pin 7 can only move up and down. Press down on 8.

Therefore, the lever 11 rotates downward and the pressing portion 131 of the microswitch 13 is pressed.

In conventional devices with such a mechanism, it is possible to control the opening and closing of multiple microswitches by widening the width of the lever, but in this case, each switch can only perform the same operation, and each switch must be controlled to open and close separately. I couldn't do it.

This invention was made in order to eliminate such drawbacks, and the purpose is to provide a switch device that can independently open and close multiple switches by rotating a single knob. .

An embodiment will be described below with reference to figures.

In Figures 2 and 3, the same reference numerals as in Figure 1 indicate corresponding parts, 16 is a rotary operating shaft screwed 6 to knob 3, and 17 is a flange provided at the lower end of this operating shaft. Two types of cams 171 and 172 for separately controlling the opening and closing of the microswitches 13 and 13' are protruded from the bottom surface thereof, and a convex portion 1 having a recess 173 formed at the top thereof is provided on the top surface.
74 are provided.

18 has a protrusion 181 that slides into contact with this protrusion 174,
A cam piece that is loosely fitted to the operating shaft 16, and has a protrusion 1 on its side.
82 is formed, and this protrusion is inserted into the guide groove 19 of the inner circumferential wall of the base 1 so that it can move only in the vertical direction.

A spring 20 urges the cam piece 18 to slide into contact with the protrusion 174.

In the above configuration, when the knob 3 is rotated, the operating shaft 1
6 also rotates, and first the cam 171 is activated by the micro switch 13'.
Push in the pressing part 131'.

When the knob 3 is further turned, another cam 172 pushes the pressing portion 131 of the microswitch 13.

That is, as the knob 3 is rotated, the cam piece 18 is pushed up by the slope of the protrusion 174, and the protrusion 181 is pushed into the recess 173, and the rotation of the knob 3 is temporarily stopped and fixed at that position.

Here, opening and closing of the microswitch 13' is controlled.

Thereafter, when the knob 3 is further rotated, the cam piece 18 pushes the other inclined part downward by the force of the spring 20, so that the operating shaft 16 momentarily rotates and stops at a fixed position between the protrusions 174.

Here, opening and closing of the microswitch 13 is controlled.

As described above, this device is equipped with a cam corresponding to each switch on the bottom surface of the flange of the operating shaft, and is further operated by a protrusion placed in parallel on the top surface of the flange and a cam piece that moves only in the vertical direction with respect to the base. Since the rotation stop position of the shaft is determined, each switch can be controlled to open and close separately.

[Brief explanation of drawings]

FIG. 1 is a vertical sectional view showing a conventional example, FIG. 2 is a vertical sectional view showing an embodiment of the invention, and FIG. 3 is an exploded perspective view thereof. In the figure, the same reference numerals indicate the same or corresponding parts, 3 is a knob, 13 is a switch, 16 is an operating shaft, and 171 and 172 are cams.

Claims (1)

[Scope of utility model registration request] In a switch device in which the opening and closing of a switch is controlled by rotating a knob, the knob is attached to the upper part, a flange is provided at the lower part to form an inverted T shape, and a convex part having a depression at the top is provided on the upper surface of the flange. The operating shaft has a plurality of cams arranged in parallel and at positions with different radii on the lower surface, and a protrusion at the bottom that slides into contact with the protrusion to determine the rotation stop position of the operating shaft. A switch device comprising a cam piece that is fitted and pressed down by a spring and moves only in the vertical direction with respect to the base, and a plurality of switches whose opening and closing are controlled by cams provided on the lower surface of the flange of the operating shaft.