JPH0614377Y2 - Switcher type switch - Google Patents

Description

[Detailed Description of the Invention] [Industrial application] The present invention relates to a buffer switch, and in particular, when a movable contact that comes in contact with and separates from a fixed contact is reciprocally moved as the swing arm swings. The present invention relates to improvement of a cylinder support structure.

[Conventional technology]

Conventionally, this type of switch type switch is constructed as shown in FIG. 3, and a bushing (2) hermetically provided on the side wall of the switch container (1) is connected to a cylinder (4) via an insulating tube (3). ) Is fixed, and a fixed contact (5) connected to the inner conductor of the bushing (2) is introduced at one end of the cylinder (4), and a pipe-like shape penetrated from the other end of the cylinder (4). Piston shaft (6)
A movable contactor (7) that comes in contact with and separates from the fixed contactor (5) is provided at the tip of the movable contactor (7), and several gas flow holes (8) are provided outside the movable contactor (7).
The nozzle (9) provided with is fixed integrally.

A connecting body (11) having a long hole (10) is fixed to the base end of the piston shaft (6), and a swing lever (1) integrated with the main shaft (12) is provided.
The tip of 3) is connected to the connecting body (11) via the connecting pin (14) loosely inserted in the elongated hole (10).

An insulating gas such as SF ₆ gas is filled in the container (1), and several gas vent holes (15) are formed in the peripheral wall at one end of the cylinder (4).

Then, from the state of FIG. 3, when the swing lever (13) is swung in the direction of the arrow a together with the main shaft (12), the piston shaft (6) moves to the right, and the movable contact (7) and nozzle ( 9) moves to the right and the movable contactor (7) contacts the fixed contactor (5) to enter the closing state.

When the swing lever (13) is swung in the direction opposite to the arrow a from this closed state, the piston shaft (6) moves to the left and the movable contact (7) opens from the fixed contact (5). Let go.

At this time, an arc is generated between the contacts (5) and (7), but the nozzle (9) moving together with the movable contact (7) removes the insulating gas on the other end side in the cylinder (4). The compressed gas passes through the gas flow hole (8) as shown by the dashed arrow and the nozzle
Since it is blown from the opening of (9) toward the fixed contact (5),
The arc is extinguished by the arc extinguishing force of the insulating gas, and the interruption is completed.

[Problems to be solved by the device]

In the case of the switcher type switch, since the connecting pin (14) at the tip of the switch moves vertically when the swing lever (13) swings, the connecting pin (14) is connected to the elongated hole (11) in the connector (11). ) Is absorbed, but the connected body is
A vertical swinging force acts on the piston shaft (6) via (11).

Therefore, in the conventional buffer switch, the one end of the cylinder (4) is fixed to the bushing (2).
Due to the vertical swing of the piston shaft (6) accompanying the swing of, the bending load as shown by the dashed line in FIG. 2 is applied to the other end of the cylinder (4). There is a problem that the strength that can withstand this bending load is particularly required.

The present invention has been made in consideration of such problems of the conventional technology, and its purpose is to prevent the rocking of the cylinder shaft accompanying the rocking of the rocking lever (13). In contrast,
It is an object of the present invention to provide a buffer type switch which a cylinder can follow.

[Means for Solving the Problems]

A configuration of the present invention for achieving the above object will be described with reference to FIGS. 1 and 2 corresponding to an embodiment.

The buffer switch in the present invention introduces a fixed contactor (5) from one end of the cylinder (4), and inserts a piston shaft (6) driven by a swing lever (13) into the other end of the cylinder (4). It penetrates more and the piston shaft in the cylinder (4)
At the end of (6), a movable contact that comes in contact with and separates from the fixed contact (5).
(7) and the movable contacts (7) are covered with the both contacts
A nozzle (9) for spraying the compressed insulating gas in the cylinder (4) toward the fixed contact (5) when the electrodes (5) and (7) are opened.
And a fixed surface (17) with which one end surface of the cylinder (4) abuts, and the fixed contact supported by the base of the fixed contact (5). A fixing plate (21) made of an elastic material sandwiching one end wall of the cylinder (4) between the surface (17) and a fixed tubular portion (18) covering the outside of one end of the cylinder (4). And an O-ring (20) provided inside the cylindrical portion (18) and elastically contacting the outer peripheral surface of the one end portion.

[Action]

In the buffer type switch constructed as described above, when the piston shaft (6) swings in the direction orthogonal to this by the swing of the swing lever (13), this swing force causes the other end of the cylinder (4). Act on.

This cylinder (4) has a fixed plate (21) whose one end surface is made of an elastic material.
Elastically contacts the fixed surface (17) with the O-ring (2
Since it is held by the fixed tubular part (18) via the (0), the fixing plate (2
Due to the elasticity of 1) and the O-ring (20), the cylinder (4) can swing with one end surface in contact with the fixed surface (17), and the swing acting on the cylinder (4) can be achieved. The cylinder (4) follows and swings according to the power.

〔Example〕

 An embodiment will be described with reference to FIGS. 1 and 2.

In these drawings, the same symbols as those used above indicate the same or corresponding ones, and (16) is a substantially bowl-shaped support metal fitting for supporting the cylinder (4), and the fixing surface (17) is attached to the inner bottom surface. Is formed and the inner wall has a cylinder (4)
A cylindrical part (18) having a diameter slightly larger than the outer diameter of one end of the cylindrical part (18) is formed, and an O-ring (20) is formed in an annular groove (19) provided in the inner periphery of the cylindrical part (18).
Is fitted, one end of the cylinder (4) is fitted to the support metal fitting (16), one end surface of the cylinder (4) abuts the fixed surface (17), and one end of the cylinder (4) is The outer peripheral surface is in elastic contact with the O-ring (20).

(21) is a disk-shaped fixed plate made of elastic material, and the connecting screw part (5) 'of the fixed contactor (5) is passed through the fixed plate (21) and the support metal fitting (16) is inserted. By screwing into the inner conductor (2) 'of the bushing (2), the support metal fitting (16) is fixed to the bushing (2) via the fixed contact (5), and at the base of the fixed contact (5). One end wall of the cylinder (4) is sandwiched between the supported fixed plate (21) and the fixed surface (17).

Therefore, in the cylinder (4), at one end thereof, the outer peripheral surface is held by the O-ring (20), and the end surface is pressed against the fixing surface (17) by the fixing plate (21). ,
It is swingably supported around the one end in a direction orthogonal to the axial direction.

As a result, when the movable contactor (7) at the end of the piston shaft (6) is brought into contact with or separated from the fixed contactor (5), the piston lever (13) swings to move the piston shaft (6) up and down. Even if the cylinder (4) is swung up and down, the cylinder (4) can be swung up and down by following this.
In addition, the bending load as in the past does not work.

In addition, in the embodiment, the fixing surface (17) and the tubular portion are attached to the support fitting (16).
Although the case where (18) is formed integrally is shown, it may be configured separately.

[Effect of device]

Since the present invention is configured as described above, it has the following effects.

Due to the elasticity of each of the fixing plate that holds the one end wall of the cylinder between the fixed surface and the fixed surface, and the O-ring provided inside the fixed cylindrical portion that holds the outer peripheral surface of the one end of the cylinder,
Since the cylinder can be swingably supported around its one end, the cylinder follows the swing of the piston shaft accompanying the swing of the swing lever, and the bending load does not act on the cylinder. The strength required for the cylinder can be set small.

[Brief description of drawings]

1 and 2 show a switcher type switch 1 according to the present invention.
FIG. 1 is a sectional view of an essential part, FIG. 2 is an overall sectional view, and FIG. 3 is a sectional view of a conventional buffer type switch. (4) …… Cylinder, (5) …… Fixed contact, (6) …… Piston shaft, (7) …… Movable contact, (9) …… Nozzle, (13) …… Swing lever, ( 17) …… Fixed surface, (18) …… Cylinder, (20) …… O
Ring, (21) …… Fixing plate.

Claims (1)

[Scope of utility model registration request] 1. A fixed contact is introduced from one end of a cylinder,
A movable contactor, which penetrates the piston shaft driven by the swing lever from the other end of the cylinder and contacts and separates from the fixed contactor at the end of the piston shaft in the cylinder, and the movable contactor of the movable contactor. In a switcher switch integrally provided with a nozzle that covers the outside and sprays the compressed insulating gas in the cylinder toward the fixed contact when the contacts are opened, one end surface of the cylinder is A fixing plate made of an elastic material that holds one end wall of the cylinder between the fixed surface that abuts and the fixed surface that is supported by the base of the fixed contact, and covers the outside of the one end of the cylinder. A buffer type switch having a fixed cylindrical portion and an O-ring provided inside the cylindrical portion and elastically contacting the outer peripheral surface of the one end.