JPH024969B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical field to which the invention pertains] The present invention relates to a selector switch that is attached to the panel surface of a switchboard or control board and operates a circuit breaker, a disconnector, an electromagnetic contactor, a small electric motor, etc.

[Prior art and its problems]

As a conventional selector switch of this type, the one shown in FIG. 1 is known. In FIG. 1, a handle 1 and a handle receiver 6 are fixed to a case 2 by screws 61. Attach the receiving plate 3 to the operating shaft 4 by caulking, and fix the spring receiver 151 and the notch piece 14 to integrate the receiving plate 3, the spring receiver 151, and the notch piece 14 to the operating shaft 4, and attach the spring 15 to this. At the same time, one end of the internal gasket 10 is fitted between the receiving plate 3 and the spring receiver 151 and inserted into the case 2, and the engaging protrusion 3 of the receiving plate 3 is inserted.
11 is inserted into a groove provided in the handle receiver 6 to connect the handle 1 and the operating shaft 4. A base 5 is fixed to the case 2, and has a hole 51 into which the lower end of the operating shaft 4 is loosely fitted, and a cam surface 52 on which a pin 141 protruding from the outer periphery of the notch piece 14 slides. It is sandwiched between case 5 and case 2. The control cam 1 is attached to the operating shaft 4 by a screw 62.
1 is fixed, and the plungers 12, 12 of the switches 13, 13 are operated by the cam 111 of the control cam 11. Attach the ring packing 9 to the case 2 of the selector switch integrated in this way, insert the selector switch into the hole in the panel 8 from the back side of the panel 8 (lower side in the figure), and insert the selector switch into the hole in the panel 8 from the surface of the panel 8. The selector switch is attached to the panel 8 by tightening the nut 7.

To operate the selector switch attached to the panel 8, when the handle 1 is twisted, the operating shaft 4 connected to the handle receiver 6 via the engagement protrusion 311 of the receiving plate 3 rotates, and the control cam 11 is rotated accordingly. rotates. The rotation of the control cam 11 causes the cam 111 to close the switch 13,
13, the pin 141 of the notch piece 14 fixed to the operating shaft 4 comes into sliding contact with the cam surface 52 of the base 5, thereby creating a notching sensation, that is, the pin 141 of the notch piece 14 slides against the cam surface 52. Since the spring 15 is contracted when it comes into sliding contact with the handle 1, the force of the spring 15 acts in a direction that prevents the handle 1 from twisting, making the twisting of the handle 1 heavier and causing the control cam 11
This creates a sensation that the switches 13, 13 are about to be operated. When the handle 1 is further twisted after the notch sensation is felt, the switches 13, 13 are operated by the cam 111 of the control cam 11.

Incidentally, this type of selector switch is equipped with a plurality of switches 13, 13, and the contact operation configuration of these switches 13, 13 is determined by the cam 111 of the control cam 11. This will be explained using the exploded view of the control cam 11 shown in FIG. In FIG. 2 the control cam is again indicated at 11;
At point X of this control cam, the normally open contact (hereinafter referred to as a contact) of one switch 13 is "open", the normally closed contact (hereinafter referred to as b contact) is "closed", and at point Y and Z, the a contact is "open". "Closed", B contact is "Open", X ₁ point is the other switch 13's A contact is "Open", B contact is "closed",
A contact operation configuration is obtained in which the a contact is "closed" and the b contact is "open" at _point Y, and both the a contact and b contact are "open" at point Z. However, since such a contact operation configuration is required by the customer, it is necessary to change the contact operation configuration each time a request is made. Therefore, the control cam must be replaced every time the customer requests it, but in conventional equipment, the entire control cam itself must be replaced even if the contact operating configuration of one switch 13 does not need to be changed. In addition, it has the disadvantage that it is extremely troublesome to manufacture and manage control cams with contact operation configurations that meet customer requirements.

[Purpose of the invention]

SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a selector switch which eliminates the drawbacks of conventional devices, allows for free combinations of contact operation configurations, and allows the desired contact operation configuration to be obtained immediately upon request.

[Key points of the invention]

According to the present invention, the object is a selector switch that opens and closes a switch via a rotary cylinder, a notch cam, and a control cam connected to a handle by twisting the handle, the notch cam being formed in a cylindrical shape. , the control cam is removably fitted in the axial direction to the rotary cylinder and has a cam surface at the lower end, and the control cam has a cam surface provided at the lower end to operate the opening/closing part depending on the type of contact operation. A plurality of divided cam pieces of different shapes are selectively combined to form a cylindrical shape, which is fitted into the cylinder of the notch cam so as to concentrically overlap with each other, and is arranged concentrically with the notch cam and the control cam. This is achieved by providing a notch ring which has a sliding portion that comes into sliding contact with the cam surface of the notch cam and is supported by a spring so that the sliding portion is constantly pressed against the cam surface of the notch cam so as to be movable only in the axial direction.

[Embodiments of the invention]

Next, one embodiment of the present invention will be described in detail based on the drawings. 3 to 5A to 5D each show an embodiment of the present invention, FIG. 3 is a sectional view of the selector switch, FIG. 4 is an exploded view of the main part, and FIGS. 5A to 5D, respectively. It is a parts diagram. In the drawings, parts having the same functions as those of the conventional device shown in FIG. 1 are given the same reference numerals.

A rotary cylinder 30 is attached to the case 2, and as shown in FIG. 4, the rotary cylinder 30 has a cylindrical shape and has two protrusions 30a, 30b.
b engages with the stepped portion 2a of the case 2, so that the rotary cylinder 30 is rotatably attached to the case 2.
A handle 1 is attached to the upper cylinder 30c of the rotary cylinder 30, and the handle 1 is inserted into the upper cylinder 30c with the cylindrical rod 31 removed.Then, by pushing the rod 31 into the handle 1, the handle 1 is inserted into the rotary cylinder 30. Fixed. A notch cam 20 is attached to the rotary cylinder 30, and as shown in FIG. By doing so, it can be attached integrally with the rotary cylinder 30. A control cam 21 is attached to the inner wall side of the notch cam 20, which is integrated with the rotary cylinder 30, so as to overlap the rotary cylinder 30.As shown in FIG. The flexible leg 21a is inserted into the notch cam 20 and attached as follows. That is, as is clear from FIG. 5A showing a cross-sectional view of the notch cam 20, the notch cam 20 has a protrusion 20b on the inner wall,
5B showing a top view and a side view of the control cam 21;
As is clear from the figures and Fig. 5C, the control cam 2
1 is divided into cam pieces 21b and 21c, and each of the cam pieces 21b and 21c has a window 21d.
After assembling the control cam 21 by fitting the protrusions 21e and recesses 21f provided at the ends of the cam pieces 21b and 21c to face each other, the flexible leg 21a is assembled. Notsuchikamu 2
0 and insert the window 21d of the flexible leg 21a into the protrusion 20.
By engaging with the notch cam 20, the control cam 21 is integrally attached to the notch cam 20, as shown in FIG. 5D.

Returning to Fig. 3, the base 5 fitted into the case 2
A columnar projection 5a is formed on the columnar projection 5a.
A notch ring 23 is inserted into a hole 23a provided in a box 23b as shown in FIG. 4, and this notch ring 23 is pressed upward in the figure by a spring 15. This allows the notch ring 23 to move only in the axial direction. A pin 23c is provided on the inner wall of the notch ring 23, and a cam surface 2 provided at the lower end of the notch cam 20 is attached to the upper surface of this pin 23c.
It is possible to make sliding contact with 0b. Push pieces 24, 24 are slidably provided on the base 5, and the upper ends of these push pieces 24, 24 touch the cam surface 21g of the control cam 21.
The lower ends of the push pieces 24, 24 are in sliding contact with the switch 13,
It faces the 13 plungers 12, 12. The selector switch thus assembled is attached to the panel 8 by attaching the ring gasket 9 and passing it through the hole in the panel 8 from the back side of the panel 8, and then tightening the nut 7 screwed into the case 2.

The operation of the selector switch shown in FIG. 3 is such that when the handle 1 is twisted, the notch cam 20 rotates via the rotary cylinder 30, and the control cam 21 rotates accordingly.
rotates. When the notch cam 20 rotates, the cam surface 20b comes into contact with the pin 23c of the notch ring 23, and the notch ring 23 is pushed down against the spring 15, producing a notch sensation. After this notch feeling is obtained, when the handle 1 is further twisted, the push piece 24 is pushed down by the cam surface 21g of the control cam 21, and the plungers 12, 1 of the switches 13, 13 are pressed down.
2 is pushed down and the switches 13, 13 are operated. At this time, if the notch cam 20 is of the manual return type shown in FIG. 6A, the notch cam 20 is returned to its original state by twisting the handle 1 in the opposite direction to the operating direction. When the notch cam 20 is of the automatic return type shown in FIG. 6B, when the handle 1 is released after operation, the notch cam 20 returns to its original state by the action of the spring 15. When the notch cam 20 is a combination of an automatic return type and a manual return type as shown in FIG. 6C, the notch cam 20 performs each operation depending on the operating direction of the handle 1. According to the present invention, the automatic return type, manual return type, and a combination of these types of opening/closing operations are possible according to the present invention.
You can obtain the respective opening/closing operations by simply replacing the .

Next, since the control cam 21 is assembled in two parts, the combination of the cam pieces 21b and 21c can be changed according to the required contact operation configuration of the switches 13 and 13. This will be explained using developed views of the cam piece 21b shown in FIGS. 7A to 7D. 7th
In the cam piece 21b shown in Figure A, the switch 1 is closed at the X point and the Y point.
The normally open contact (hereinafter referred to as A contact) of No. 3 is "open", the normally closed contact (hereinafter referred to as B contact) is "closed", and Z
A cam is obtained in which the a contact is "closed" and the b contact is "open" at the point X. In the cam piece 21b shown in FIG. 7B, the a
A cam is obtained in which the contact is "closed" and the b contact is "open", and the a contact is "open" and the b contact is "closed" at the Y point and Z point, and the cam piece 21b shown in FIG. At the Z point, the a contact is "closed" and the b contact is "open", and at the Y point, the a
A cam with the contact "open" and the b contact "closed" is obtained,
In the cam piece 21b shown in FIG. 7D, the a contact is "open" and the b contact is "closed" at point X, and the a contact and b contact are "closed" at point Y.
Both contacts are "open", and the a contact is "closed" at point Z.
A cam with the b contact "open" is obtained. By combining the cam pieces 21b divided in this way as required, various control cams 21 can be obtained depending on the contact operation configuration of the switch.Furthermore, since the control cam 21 is removable, various Control cams can be installed according to each request, and manufacturing management does not require much effort.

〔Effect of the invention〕

As explained above, according to the present invention, a cylindrical control cam is cut in the axial direction and divided into a plurality of cam pieces, and a different switch contact operation configuration is obtained on the lower surface of the divided cam pieces. By forming a cam surface for this purpose, it is possible to easily obtain a contact operation configuration that meets the customer's requirements by combining the cam pieces, and since the combination is free, the contact operation configuration that meets the customer's requirements can be easily obtained. Since there is no need to manufacture and manage the control cam having the configuration, there is an advantage that management is not time-consuming.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing a conventional device, FIG. 2 is an exploded view of a control cam of the conventional device, FIGS. 3 to 5A to 5D each show an embodiment of the present invention, and FIG. The figure is a sectional view, Figure 4 is an exploded view of the main parts,
Figures 5A to 5D are parts diagrams, Figures 6A to 6C are developed views of the notch cam of the present invention, and Figures 7A to 7D are developed views of the cam piece of the control cam of the present invention. This is a developed view. 1: Handle, 20: Notch cam, 20b: Cam surface, 21: Control cam, 21b, 21c: Cam piece,
21g: cam surface, 23: notch ring, 30: rotating cylinder.

Claims (1)

[Claims] 1. A rotating cylinder connected to a handle by twisting the handle;
A selector switch that opens and closes a switch via a notch cam and a control cam, wherein the notch cam is formed in a cylindrical shape, is detachably fitted in the rotary cylinder in the axial direction, and has a cam surface at a lower end. , the control cam is formed into a cylindrical shape by selectively combining a plurality of divided cam pieces of a plurality of types with different shapes of cam surfaces provided at the lower end to operate the switch according to the type of contact operation. It is fitted into the cylinder of the notch cam so as to concentrically overlap with each other, is arranged concentrically with the notch cam and the control cam, and has a sliding contact portion that comes into sliding contact with the cam surface of the notch cam. A selector switch characterized by having a notch ring pressed against the cam surface of a notch cam and supported movably only in the axial direction.