JPH089877Y2 - Extinguishing room structure such as circuit breaker - Google Patents

Description

[Detailed Description of the Invention] [Technical field to which the invention belongs] The invention of the present application has a contact and a contact opening / closing mechanism inside a body composed of a base and a cover, and extinguishes an arc generated by opening the contact. The present invention relates to an extinguishing chamber structure such as a circuit breaker having an arcing device.

[Prior Art] Conventionally, in this type of circuit breaker or the like, dust always enters the inside of the body through a partition plate that partitions the inside of the body into an extinction chamber and a mechanism chamber, and an exhaust hole that discharges arc gas to the outside of the body. An elastic valve that prevents the occurrence of arc gas, and when the arc gas is generated inside the body, elastically deforms due to the pressure and quickly discharges the gas, fixed insulation that prevents the arc generated between the contacts from transferring to the fixed conductor. Some were equipped with boards.

[Problems of Prior Art] However, since they are configured as separate parts, assembly work and parts management are complicated.

[Object Means and Actions] The present invention aims to simplify the assembly work and parts management by integrally forming the above parts.

Description of Embodiments Embodiments will be described below with reference to the drawings.

 1 and 2 are views of an embodiment of the present invention.

In the figure, reference numeral 1 is a base, and 2 is a cover, which is fastened and fixed with screws or the like (not shown) to form a body. Reference numeral 3 is a fixed conductor, 4 is a terminal for connecting an outer conductor mounted on the outside of the body of the fixed conductor, 5 is a fixed contact fixed to the cut-and-raised portion 3 ′ of the fixed conductor 3, and 6 is fixed to the movable conductor 7. It is a movable contact.

The movable conductor 7 opens and closes the contacts 5 and 6 connected to a mechanism arranged inside the body (not shown).

Reference numeral 100 denotes an extinguishing device that holds the magnetic extinguishing plate 120 between the extinguishing walls 110, 110, but it is not particularly limited to this structure.

200 is a partition plate part 210, a fixed insulating part 230, an exhaust valve part 220
It is a substantially U-shaped insulator integrally formed with, and is made by punching and bending a plate-shaped insulator or molding it with an insulating resin.

The partition plate portion 210 partitions the inside of the body into an extinguishing chamber in which an arc is generated and extinguished, and a mechanism portion chamber in which the mechanism portion is installed, and prevents an arc generated in the extinction chamber from leaking to the mechanism portion side as much as possible. It has a function, and includes a shield portion 212, a groove 211 for introducing the movable conductor 7 from the mechanism portion chamber into the extinction chamber, an overhang portion 213, and a shoulder portion 214.

The fixed insulating part 230 has a function of preventing the arc generated between the contacts 5 and 6 from being unnecessarily transferred to the fixed conductor and deteriorating the extinction performance, and includes a covering part 231 and a groove 232 for exposing the contact. . In the example shown in the drawing, the fixed contact 5 and the cut-and-raised portion 3 ′ of the fixed conductor are exposed from the groove 232 to the movable contact side, but the cut-and-raised portion is not formed and the groove portion 232 serves as a hole for the contact 5. Only the contact 5 may be exposed, or the cut-and-raised part may be left as it is, and the cut-and-raised part 200 may be formed by resin molding so as to cover the cut-and-raised part 3 '. Further, the arc running portions of the contact and the conductor may be exposed.

The exhaust valve part 220 is composed of a fixed part 221 and an elastic valve part 222. The elastic valve part 222 normally blocks the extinction chamber and the passage outside the body as shown in FIG. When an arc is generated on the inside and the internal pressure rises, it elastically deforms like 222 'and opens the mouth,
It has a function of discharging the arc gas to the outside of the body. Reference numeral 223 denotes a projecting portion which is continuous with the fixed portion 221, and has a shoulder portion 224.

In the above-described substantially U-shaped insulator 200, after the fixed conductor 3 is first placed in the recess 11 of the base, the substantially U-shaped insulator protrusions 213 and 223 are provided on the fixed conductor to form the base groove portion 12. , 13 and cover, and then put the extinguishing device 100 on it, and hold and fix the extinguishing device by the base and the cover. In the example of this figure, the substantially U-shaped insulator is attached to the shoulder portion 21 by the latching pieces 111 and 112 of the extinguishing device.
Although it is fixed by pressing 4,224, the shoulder 21
You may press 4,224.

In addition, 300 is an exhaust plate provided with an exhaust small hole 302, and if necessary, it is inserted and fixed to the base groove 12 together with the exhaust valve 220 at the position shown in the drawing.

[Effects] The structure of the extinguishing chamber using the substantially U-shaped insulator as described above has a smaller number of parts than the conventional partition plate, the insulating plate of the fixed conductor, and the exhaust valve are configured as separate parts. This has the effect of simplifying parts management and assembly.

[Brief description of drawings]

Fig. 1 ・ ・ ・ Assembled sectional view of the embodiment of the present invention Fig. 2 ・ ・ ・ Same as exploded view 1 …… Base, 2 …… Cover, 3 …… Fixed conductor, 5 …… Fixed contact, 6 …… Movable contact, 7 ... Movable conductor, 100 ... Disappearing device, 200
…… Abbreviated U-shaped insulator, 210 …… Partition plate, 220 …… Exhaust valve, 230 …… Fixed insulation

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Masazumi Hioka Inventor, Masazumi Hioka 3-1-2, Oshu, Minami-ku, Hiroshima-shi, Hiroshima Within Tempar Industrial Co., Ltd. (72) Tetsuo Furumoto Daishu, Minami-ku, Hiroshima-shi, Hiroshima Shinichi Nakagawa, Examiner, 3-14-42, Tempar Industrial Co., Ltd.

Claims (1)

[Scope of utility model registration request] 1. A fixed contact fixed to a fixed conductor, a movable contact fixed to a movable conductor, and a mechanism portion for mechanically connecting with the movable conductor to open and close the contact inside a body composed of a base and a cover. In a circuit breaker having an arc extinguishing device for extinguishing an arc generated when the contact is opened, a partition plate part for partitioning the inside of the body into an arc extinguishing chamber for installing the arc extinguishing device and a mechanism chamber for installing the mechanism part And the elastic valve part that blocks the exhaust hole that discharges the arc gas generated in the arc-extinguishing chamber to the outside of the body, and the insulating part that exposes at least the fixed contact and hides part of the fixed conductor in the back part. An arc-extinguishing chamber structure for a circuit breaker, characterized in that it is integrally formed in a substantially U-shape by connecting partition plates in this order, and is fixedly held between a cover or an arc-extinguishing device and a base.