CN101471207A - Circuit breaker - Google Patents
Circuit breaker Download PDFInfo
- Publication number
- CN101471207A CN101471207A CNA2008100945227A CN200810094522A CN101471207A CN 101471207 A CN101471207 A CN 101471207A CN A2008100945227 A CNA2008100945227 A CN A2008100945227A CN 200810094522 A CN200810094522 A CN 200810094522A CN 101471207 A CN101471207 A CN 101471207A
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- movable contact
- contact
- spring
- extension spring
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Abstract
The present invention provides a circuit breaker which can obtain a larger switching-on amount of movable contact element when a short current is generated and the movable contact element rebounds by means of electromagnetic repulsion force. The extension springs (5, 4) which are used for causing the movable contact element to generate contact pressure are composed of one group of extension springs. The group of extension springs is formed through connecting between two end parts of two spring coils composing the spring with the connecting parts (5b, 4b) and respectively forming hooks (5a, 4a) on the other end of each spring coil. The connecting of the group of extension spring is abutted against the surface at the opposite side of movable contact. Each spring coil part of extension spring is configured at two axial surfaces of rotation shaft of movable contact element through the surface of the opposite side. Simultaneously, the hooks are directly fixed on the fixed ribs (6a, 6b) on the driving rod for exerting the contact pressure.
Description
Technical field
The present invention relates to Inturruptor for sub-line or residual current circuit breaker etc. has rotation and movably contacts
The circuit-breaker of part particularly relates to and realizes that improving the movable contact of rotation scolds by electromagnetism
The circuit-breaker of the rebound distance that power produces (open pole span from).
Background technology
As the existing circuit-breaker that uses the movable contact of rotation, for example has disclosed circuit-breaker in the patent documentation 1.Disclosed circuit-breaker constitutes in this patent documentation 1, utilizes 2 extension springs with respect to the rotation axis balanced configuration that contact carriage (movable contact) is floated and is fixed in the rotating drive rod.Each spring one end is fixed on the contact carriage, the other end is fixed on the bar in the breach that is housed in the rotating drive rod, rotation contact carriage (movable contact) is when circuit-breaker is connected, and the active force that utilizes extension spring pushes the moving contact at contact carriage (movably contact) two ends to fixed contact.
Patent documentation 1: No. 3352750 communique of patent (～the 4 page of left hurdle of the 48th row, the 3rd page of right hurdle the 22nd row, Fig. 5)
Summary of the invention
Existing circuit-breaker constitutes, one end of extension spring be fixed on movable contact with the contact opposite surfaces on, the other end then forms hook in the width of the spring coil that forms extension spring, and makes the maintenance pin run through hook, will keep pin to be fixed on the rotating drive rod.Therefore, but owing to keep pin and movable contact to interfere, therefore there is the bigger problem of maximum dose of opening that can't make between the contact in movable contact by electromagnetic repulsion force and the action of knock-oning when big electric current occurring.In addition, if for increase hold maximum dose and adopt not can with the movable contact shape that keeps pin to interfere, then must reduce the sectional area of movable contact, the temperature in the time of can't be with energising rises and suppresses lowlyer.In addition, also there is the problem that causes movable contact distortion easily because of switching.In addition, there is the problem that keeps pin to cause cost to increase because of using.
The present invention proposes in order to address the above problem, and its purpose is to provide a kind of circuit-breaker, its can be when short circuit current occurring movable contact when knock-oning action by electromagnetic repulsion force, obtain the maximum dose of opening of bigger movable contact.
Circuit-breaker involved in the present invention has: the movable contact of rotation, and its both ends have moving contact; Power supply side terminal and load side terminal, the fixed contact that it is provided with the moving contact co-operating of this movable contact flows through electric current to above-mentioned moving contact when short circuit current occurring, make above-mentioned movable contact produce the electromagnetic repulsion force that knock-ons to open position; The rotating drive rod, it is used for transmitting revolving force to above-mentioned movable contact; And extension spring, it is fixed on this rotating drive rod, on the on-position of circuit breaker, above-mentioned moving contact is pushed to above-mentioned fixed contact, apply the contact force of movable contact, in this circuit-breaker, above-mentioned extension spring is made of one group of extension spring, above-mentioned one group of extension spring is by connecting by connecting portion between the end that makes 2 spring coils that constitute spring, simultaneously, on another end of each spring coil, form hook respectively and form, the above-mentioned connecting portion of above-mentioned one group of extension spring is connected on the surface of an opposite side with the moving contact side of above-mentioned movable contact, stride across the surface of this opposition side, each spring coil of extension spring partly is configured on the two axial surfaces of the rotation axis of movable contact, simultaneously, above-mentioned hook is directly fixed on the fixing rib that is arranged on the above-mentioned rotating drive rod, to apply above-mentioned contact force.
The effect of invention
Circuit breaker in a circuit according to the invention, there is not shelter in the movable contact rebound space in the rotating drive rod, when therefore movable contact knock-ons action by electromagnetic repulsion force when short circuit current occurring, can obtain the maximum dose of opening of bigger movable contact, can obtain cheapness and have the circuit-breaker of high current limiting performance.
Above-mentioned and other purpose, feature and effect of the present invention can become more clear by detailed description in the following execution mode and accompanying drawing.
Description of drawings
Fig. 1 is the profile of movable contact rebound state of the circuit-breaker of expression the 1st execution mode of the present invention.
Fig. 2 is the profile of on-state of the circuit-breaker of expression the 1st execution mode of the present invention.
Fig. 3 is the disconnection of circuit-breaker of expression the 1st execution mode of the present invention or the profile of tripped condition.
Fig. 4 is the end view and the vertical view of shape of the extension spring of expression the 1st execution mode of the present invention.
Embodiment
The 1st execution mode.
Below, the circuit-breaker of the 1st execution mode of the present invention is described with reference to Fig. 1～Fig. 4.Fig. 1 is the profile of movable contact rebound state of the circuit-breaker of expression the 1st execution mode of the present invention, Fig. 2 is the profile of the on-state of indication circuit circuit breaker, Fig. 3 is the profile of the state of disconnection of indication circuit circuit breaker or tripping operation, and Fig. 4 is the end view (Fig. 4 (a)) and the vertical view (Fig. 4 (b)) of the shape of the extension spring in expression the 1st execution mode.
In addition, same label is represented identical or suitable part among each figure.
In Fig. 1～Fig. 4, be provided with movable contact 1 and power supply side terminal 2, load side terminal 3 in the explosion chamber 7, the revolving force by transmitting from mechanism (not shown) via rotating drive rod 6 makes movable contact 1 carry out rotational action.When circuit-breaker is connected, be arranged on the fixed contact 2a butt on moving contact 1a and the end that is arranged on power supply side terminal 2 on the end of movable contact 1, be arranged on the fixed contact 3a butt on moving contact 1b and the end that is arranged on load side terminal 3 on the end of movable contact 1.
The opposite end in the end with fixed contact 2a is set of power supply side terminal 2 is provided with and is used for the bolt hole 2b that is connected with electric wire, on the opposite end in the end with fixed contact 3a is set of load side terminal 3, be provided with the bolt hole 3b that is connected with the overcurrent tripping element.
For when circuit-breaker is connected, produce the contact contact pressure to fixed contact 2a, 3a pushing, configuration extension spring 4,5 in rotating drive rod 6 with moving contact 1a, the 1b of movable contact 1.Extension spring 4 and extension spring 5 makes that connecting portion 4b, the 5b by the U font connects between the end of 2 spring coils that constitute spring respectively as shown in Figure 4, constitutes one group of extension spring 4,5 respectively.In addition, the U font connecting portion 5b of extension spring 5 is fastened on the surperficial 1c of an opposite side with moving contact 1a of movable contact 1, strides across surperficial 1c and each spring coil of extension spring 5 partly is configured on the two axial surfaces of the rotation axis of movable contact 1.Similarly, the U font connecting portion 4b of extension spring 4 is fastened on the surperficial 1d of an opposite side with moving contact 1b of movable contact 1, strides across surperficial 1d and each spring coil of extension spring 4 partly is configured on the two axial surfaces of the rotation axis of movable contact 1.
In addition, on another end of the spring coil of extension spring 4,5, at a pair of hook of arranged outside 4a, the 5a of the spring coil that constitutes extension spring, each hook 4a, 5a directly are fastened on fixing rib 6a, the 6b that is arranged on the rotating drive rod 6 respectively.
In this manner in the circuit-breaker of the 1st execution mode of Gou Chenging, the movable contact 1 that is in "on" position (on-state) produces when accident under the situation that big electric current occurs, by the electromagnetic force that is subjected to from power supply side terminal 2 and load side terminal 3, to direction rotation away from fixed contact 2a, 3a.At this moment, the movable contact in as shown in Figure 2 rotating drive rod 6 knock-ons does not have shelter among space 6c, the 6d, thus the sectional area that does not need to reduce movable contact 1 just can make movable contact shown in Figure 1 to open maximum dose (rebound amount) A bigger.Its result makes circuit-breaker increase the current limitation effect of fault current.
In addition, extension spring 4,
-Connect 2 spring coils by U font connecting portion 4b, 5b in 5, hook 4a, 5a directly engage with fixing rib 6a, the 6b of rotating drive rod 6, therefore do not need extra parts, form structure cheap and that be easy to assemble.
Claims (3)
1. circuit-breaker, it has:
The movable contact of rotation, its both ends have moving contact;
Power supply side terminal and load side terminal, the fixed contact that it is provided with the moving contact co-operating of this movable contact flows through electric current to above-mentioned moving contact when short circuit current occurring, make above-mentioned movable contact produce the electromagnetic repulsion force that knock-ons to open position;
The rotating drive rod, it is used for transmitting revolving force to above-mentioned movable contact; And
Extension spring, it is fixed on this rotating drive rod, on the on-position of circuit breaker above-mentioned moving contact is pushed to above-mentioned fixed contact, applies the contact force of movable contact,
It is characterized in that,
Above-mentioned extension spring is made of one group of extension spring, above-mentioned one group of extension spring is by connecting by connecting portion between the end that makes 2 spring coils that constitute spring, simultaneously, on another end of each spring coil, form hook respectively and form, the above-mentioned connecting portion of above-mentioned one group of extension spring is connected on the surface of an opposite side with the moving contact side of above-mentioned movable contact, stride across the surface of this opposition side, each spring coil of extension spring partly is configured on the two axial surfaces of the rotation axis of movable contact, simultaneously, above-mentioned hook is directly fixed on the fixing rib that is arranged on the above-mentioned rotating drive rod, to apply above-mentioned contact force.
2. circuit-breaker according to claim 1 is characterized in that,
Above-mentioned connecting portion is the connecting portion of U word shape roughly.
3. circuit-breaker according to claim 1 and 2 is characterized in that,
With above-mentioned one group of extension spring, dispose at least one pair of symmetrically with respect to the center of rotation of above-mentioned movable contact.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2007337181A JP2009158370A (en) | 2007-12-27 | 2007-12-27 | Circuit breaker |
| JP2007337181 | 2007-12-27 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101471207A true CN101471207A (en) | 2009-07-01 |
Family
ID=40828561
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008100945227A Pending CN101471207A (en) | 2007-12-27 | 2008-04-18 | Circuit breaker |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2009158370A (en) |
| CN (1) | CN101471207A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103094012A (en) * | 2011-10-28 | 2013-05-08 | 三菱电机株式会社 | Circuit breaker |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4321296B2 (en) * | 2004-02-19 | 2009-08-26 | 富士電機機器制御株式会社 | Repulsive circuit breaker contactor device |
| US7005594B2 (en) * | 2004-04-16 | 2006-02-28 | Ls Industrial Systems Co., Ltd. | Movable contactor assembly of circuit breaker |
-
2007
- 2007-12-27 JP JP2007337181A patent/JP2009158370A/en active Pending
-
2008
- 2008-04-18 CN CNA2008100945227A patent/CN101471207A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103094012A (en) * | 2011-10-28 | 2013-05-08 | 三菱电机株式会社 | Circuit breaker |
| CN103094012B (en) * | 2011-10-28 | 2016-01-20 | 三菱电机株式会社 | Circuit-breaker |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2009158370A (en) | 2009-07-16 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Open date: 20090701 |