JPS6228027Y2 - - Google Patents

Description

[Detailed explanation of the idea] This invention relates to the structure of a selector switch.

A selector switch is a twist-type switch that is attached to the panel surface of a power distribution board or control panel to operate electrical controls, disconnectors, disconnectors, magnetic contactors, small electric motors, etc. An example of the structure of a conventional selector switch is shown in FIG. In FIG. 1, when the key 1 is twisted, the rotor 2 rotates, and the rotary piece 3 combined with the rotor 2 rotates. When the foot portion 4 of the rotary piece 3 rotates on the cam surface 6 of the cylindrical cam 5, the cam 5 is pushed down and the contact portion 9 is opened and closed via the push rod 8. That is, the cylindrical cam 5 is driven up and down by the twisting position of the key 1, and the contact portion 9 is
This is a switch that selects the on or off state of the switch. Note that 10 is a return spring for the cylindrical cam 5;
The selector switch is fixed to a panel surface 13 by a flange 11 and screws 12. By the way, this torsion type switch has two types: a spring return type (automatic return type) that returns to the original neutral position when the operator releases the key fixed to the panel surface after operating it, and a non-return type that stops at the twisted position. There is a manual return type. Also,
Turn the key from the first position to the second position,
In some switches, after the operation is completed, the key is further turned to the third or fourth position, and the operation is performed one after another according to a certain program.
Some of these positions require automatic return and others require manual return. As described above, there are many types of selector switches that can perform various opening and closing operations.
However, since one type of cam is required for one type of selector switch, the number of types of cams is equal to the number of types of selector switches. Therefore, the number of cams becomes very large, and in order to accommodate all of these cams, a wide variety of molds are required for molding, which results in a large investment amount for molds and troublesome manufacturing management. Ta.

This invention was made in view of the above-mentioned drawbacks with the aim of reducing the number of molds and saving the labor of manufacturing control.

To achieve this purpose, this invention consists of a piece with legs that is attached to a rotor that rotates by twisting a key, a cylindrical cam that has a cam surface on the upper side that comes into contact with the foot of the piece, and an operating foot on the lower side. The selector switch has a cylindrical cam which opens and closes a contact portion using an operating leg, and is characterized in that upward and downward cam surfaces and operating legs are respectively provided on the upper and lower surfaces of the cylindrical cam.

Embodiments of this invention will be described in detail below based on the drawings.

FIG. 2 is a perspective view showing an example of a cylindrical cam used in the selector switch according to this invention. In FIG. 2, a cylindrical cam 5 is provided with an upward cam surface 14 and a downward cam surface 15 on both its upper and lower surfaces back to back. Of course these two cam surfaces 1
4 and 15 have different shapes. Further, an operating leg 7 for contacting the operating rod 8 of the contact portion 9 is provided so as to pass through the circumference of the cylindrical cam 5 from above and below. That is,
One cylindrical cam 5 is provided with two different types of cam surfaces. Therefore, one cylindrical cam can be manufactured using one mold and used for two types of selector switches. In this embodiment, the upward cam surface 14 is for a two-position manual return type, and the cam surface 14 includes a slope 14a and a recess 14b provided at the apex.
It is made up of. Also, the downward cam surface 15 is 2
The cam surface 15 has a horizontal portion 15b at the apex, but only the slope 15a is used. When this cylindrical cam 5 is attached to a selector switch with the cam surface 14 facing upward as shown in FIG. 3, a manual return type selector switch is obtained. Moreover, when the cam surface 15 is mounted upward, it becomes an automatic return type selector switch. Next, this operation will be explained.

4 and 5 show the cylindrical cam 5 shown in FIG.
This is a developed diagram. When the key 1 shown in FIG. 3 is turned, the foot 4 of the piece 3 rotates in the direction of the arrow as shown in FIG. 14 and falls into the recess 14b of the cam surface 14 as shown in B. Since the rotor 2 is configured to stop after rotating through a certain angle, the legs 4 of the piece 3 attached to the rotor also stop, completing one operation. To return the cam surface 14 to its original position, manually rotate the piece 3 in the opposite direction and pull out the foot 4 from the recess 14b of the cam surface 14.
When lowered from 4a, the cam surface 14 is lifted up by the return spring 10 shown in FIG. The foot of the piece 3 falls into the recess 14b of the cam surface 14, and the cam surface 14 and the foot 4 of the piece 3 do not return automatically, so they are returned manually. FIG. 5 shows a case where the cylindrical cam is turned upside down. When the key 1 shown in FIG. 3 is turned in FIG. Climb the slope 15a. Since the rotor is configured so that it stops after rotating through a certain angle when it reaches the point shown at B, the foot 4 of the piece 3 also stops, completing one operation. However, if the operator lets go of the hand that was twisting the key 1, the foot 4 will move to the rotor 2.
At the same time, it relatively slides down the slope 15b and returns to its original position. The cam surface 15 is then floated by the return spring 10. In other words, it is an automatic return type. Of course, in both the case of FIG. 4 and the case of FIG. 5, the operating foot 7 opens and closes the contact portion 9 via the push rod 8.

In the above embodiment, one cylindrical cam with two types of cam surfaces, a manual return type and an automatic return type with two-position operation, was described. It is also possible to provide a 3-position program and provide other surfaces with cam surfaces for 4 positions, for example, that follow other programs.

In this embodiment, the cam is provided between the rotating piece and the push rod, but it is also possible to use the rotating piece as a cam and provide cam surfaces back to back on its upper and lower sides.

As mentioned above, in the selector switch of this invention, the cam surfaces of the cylindrical cams, which are the important part of the operating mechanism, are made back-to-back, and each has a different operating method and program.
Since it can be made compatible with two types of selector switches with different operating methods and programs, half the types of cylindrical cams are sufficient for the required operating methods and program types, and the number of molds used to mold the cylindrical cams can be reduced by half. This reduces the investment amount for molds and reduces the labor involved in manufacturing management.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal cross-sectional view showing one configuration of a conventional selector switch, Fig. 2 is a perspective view showing an example of a cylindrical cam for a selector switch according to this invention, and Fig. 3 is a longitudinal cross-sectional view showing the configuration of a selector switch according to this invention. The top view, FIGS. 4 and 5 are exploded views showing examples of the operation of the cylindrical cam for a selector switch according to this invention. Before B shows the after operation. 1...key, 3...piece, 4...piece foot, 5...
...Cylindrical cam, 7...Cam operating foot, 14...Cam surface for manual return, 15...Cam surface for automatic return, 14
a, 15a... cam slope, 14b... cam recess.

Claims (1)

[Claims for Utility Model Registration] 1. A piece with legs that is rotated together with a rotor that rotates by twisting a key, an inclined cam surface that abuts the legs of the piece on one side, and an operation on the other side. A selector switch is equipped with a cylindrical cam having feet, and the cylindrical cam is moved in the axial direction by pushing the cam surface with the foot of the piece, and the contact portion is opened and closed by the operation foot. A selector switch characterized by having separate legs. 2. A selector switch according to claim 1, characterized in that the diameter of the cylindrical outer peripheral surface of the cam surface is slightly smaller than the diameter of the inner diameter surface of the operating foot.