JPS5914977Y2 - disconnector - Google Patents

Description

[Detailed description of the invention] The present invention relates to an improvement of a disconnector, in particular, to prevent the blade from swinging in the lateral direction when the circuit is opened, and to ensure stable contact between the blade and the bearing contactor. The purpose is to

Conventionally, as a disconnector, two blades 39 parallel to each other are used as shown in FIG.
There is a known device in which the tip portion is moved toward and away from the fixed contact 37 by rotating it.

In such a disconnector, it is necessary to obtain reliable contact between the blade and the bearing that supports the blade, and in order to easily and reliably close the circuit, a disconnector as shown in Fig. 3 is required. It is necessary to prevent the blade 39 from swinging laterally.

This invention was devised to meet these demands.
This invention relates to a disconnector characterized in that three or more protrusions are formed on the shaft support of the blade and project toward a bearing contactor that supports the blade.

To explain an example of the implementation of the present invention with reference to the drawings, the base 1
Above, a pair of terminal plates 3, 4 of equal height are placed through insulators 2, respectively.
is fixed.

On one terminal plate 3, there is a bearing contactor 6 having a substantially U-shaped cross section with a pair of mutually parallel contact pieces 5 on both sides, and on the other terminal plate 4, an inner end of this terminal plate 4 is disposed. A fixed contact 7 is bent vertically upward, and a stopper 8 having a hook is provided on the outside thereof.

One end of each blade 9 is rotatably supported on the outside of the contact piece 5 of the bearing contactor 6, parallel to each other while being pressed against the contact piece 5 by a shaft 10 and a spring 11. Three contact protrusions 12 are provided on the facing surfaces so as to protrude so as to contact the outer surface of the contact piece 5, respectively.

These three protrusions 12 define one plane for the rotation locus of the blade 9, and in particular serve to prevent the blade 9 from rolling when it opens.

Therefore, these contact protrusions 12 are not formed all together on either the inside or outside of the blade 9 with the axis 10 as a boundary, but are always located on both the inside and outside with the axis 10 as a boundary. and it should be as far away from axis 10 as possible.

The protrusions 12 also provide reliable contact, ie, stable electrical continuity, between the blade 9 and the bearing contact 6, and provide appropriate resistance to rotation of the blade.

The other end of the blade 9 is divided into two by a groove 13 extending in the longitudinal direction at the center thereof, so that the two divided contact portions contact the fixed contact 7 independently. This ensures reliable and stable contact.

The blades 9 are tightened inwardly by the screw 14 passing through the two blades 9 through the groove 13 and the interposed pressing spring 15, and when the blades 9, 9 are inserted, the blades 9 are tightened inwardly.
A constant contact 7 is clamped between the blades 9 and a collar 16 inserted between the blades 9 to ensure a mutual spacing when the blades 9 are opened.

The other end of the blade 9 is also provided with a pair of hook receiving plates 17 whose ends are connected to each other, and two connecting pins 18 .
It is fixed by 18.

A shaft 19 is inserted through the middle part of the hook receiving plate 17,
A hook 20 is rotatably supported on this shaft 19, and the hook 20 is constantly biased counterclockwise in FIG. 2 by an expansion spring 21 provided between the coupling pin 18 and the hook 20. has been done.

As shown in FIG. 2, when the blade 9 is inserted, the stopper 8 engages with the hook 20 to lock the blade 9.

When the hook is inserted into the round hole 22 provided in the hook receiving plate 17 and pulled up, the portion of the hook 20 protruding into the round hole 22 is lifted at the same time, and the hook 20 rotates and separates from the stopper 8. The blade 9 rotates and the circuit is opened.

In order to prevent the blade 9 from swinging in the lateral direction when opening,
A special spacer inserted between two blades (
For example, Japanese Patent Application Laid-Open No. 51-93371) is known.

However, this has the drawback that it requires a large number of parts and is not necessarily easy to manufacture.

On the other hand, in the present invention, by providing three or more protrusions protruding toward the contact piece 5 of the bearing contactor 6 on the shaft support of the blade 9, one surface is defined by these three points, This prevents the blade 9 from shaking horizontally, and
The feature is that stable contact between the blade 9 and the bearing contactor 6 can be obtained.

[Brief explanation of the drawing]

The drawings show an example of the implementation of the present invention; FIG. 1 is a plan view, FIG. 2 is a front view, and FIG. 3 is a schematic plan view showing a conventional example. 6... Bearing contact, 7... Fixed contact, 9... Blade, 12... Contact protrusion, 13... Division groove .

Claims (1)

[Scope of utility model registration request] In a disconnector in which a pair of parallel blades, one end of which is press-contacted to a bearing contact and rotatably supported by a shaft, is rotated so that the tip comes into contact with and separates from a fixed contact, the tip of the blade has a split groove. The part of this blade facing the bearing contactor has three parts that protrude toward the bearing contactor.
1. A disconnector having three or more contact protrusions, the contact protrusions being scattered on the inside and outside of the blade with the center of rotation of the blade as a boundary.