CN202221746U - Small-size circuit breaker - Google Patents
Small-size circuit breaker Download PDFInfo
- Publication number
- CN202221746U CN202221746U CN2011203334311U CN201120333431U CN202221746U CN 202221746 U CN202221746 U CN 202221746U CN 2011203334311 U CN2011203334311 U CN 2011203334311U CN 201120333431 U CN201120333431 U CN 201120333431U CN 202221746 U CN202221746 U CN 202221746U
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- CN
- China
- Prior art keywords
- tripping
- snap close
- circuit breaker
- connecting rod
- housing
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- Withdrawn - After Issue
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Abstract
A small-size circuit breaker solves the problems of the existing small-size circuit breaker that: the internal structure is complicated, the internal assembly not sensitively acts and the action reliability is relatively low. The small-size circuit breaker comprises a shell, a movable contact, an operating mechanism, a freely tripping mechanism, a bimetallic strip and an electromagnetic system, wherein the operating mechanism comprises a handle and a U type connecting rod; the freely tripping mechanism comprises a jump button and a fastener; the handle is inserted into and connected with the U type connecting rod of the jump button to make the U type connecting rod drive the jump button to slide in the shell, the jump button rotates along a support leg of the U type connecting rod of the jump button, one end of the jump button is fastened with the fastener, another end of the jump button is connected with the movable contact, one end of the fastener is hinged with the shell and the electromagnetic system and the bimetallic strip are respectively connected with the fastener. The small-size circuit breaker has the following beneficial effects: the internal structure is simple, the operation is flexible, the installation and maintenance are convenient and the switching performance is strong.
Description
Technical field
The utility model relates to a kind of low-voltage electrical apparatus, is specifically related to a kind of miniature circuit breaker.
Background technology
In each unit of miniature circuit breaker, contact system, arc quenching system, operating mechanism, free tripping mechanism, over-current protection system and short circuit protection system have been comprised.Make operating mechanism drive the moving contact motion in the contact system through operating grip, miniature circuit breaker is connected and disjunction, realize control electric wiring; Through sensing, electric wiring is transshipped, implements during fault such as short circuit protection to heating effect of current and magnetic effect.
When dynamic/static contact contacted and enough contact pressures are arranged, miniature circuit breaker was connected electric loop, through the local temperature variation of bimetallic element sensing miniature circuit breaker, judged the size of current of circuit system, realized excess current protective function.When loop current remains on load current value that miniature circuit breaker sets and when following, the distortion that the thermal effect that this electric current produces produces hardware is very little, and tripper is triped; When loop current surpassed the rated current of setting, the hardware temperature of miniature circuit breaker raise, and can produce enough thermal deformations; The promotion free tripping mechanism is triped, and at this moment, the dynamic/static contact in the contact system separately; Cut off current circuit, realize current protecting function.
Short circuit protection system is by solenoid electromagnet sensing loop change in current; When loop current is in normal value or when the short-circuit protection value of setting is following; The electromagnetic attraction that solenoid electromagnet produces can not overcome the active force of reaction spring, and moving iron core remains on initial position; When the current circuit failed because, electric current sharply increases, and the electromagnetic force that solenoid electromagnet produces overcomes the active force of reaction spring; Moving iron core promotes push rod; And act on free tripping mechanism, and free tripping mechanism is triped, moving contact is opened under the effect of spring fast; Cut off current circuit, realize short-circuit protection function.
The effect of operating mechanism is the active force through handle, drives the moving contact motion in the contact system, realizes connecting and disjunction; In dynamic/static contact disconnection process,, require moving contact that enough opening speeds will be arranged in order to realize metering function; Enough dielectric strengths are arranged when making the miniature circuit breaker off-state, must make to have enough electric clearances between dynamic/static contact.
The effect of arc quenching system be when miniature circuit breaker when breaking off excessive short circuit current, through effect, realize that the restriction electric current continues the trend that increases, i.e. metering function, and electric arc is eliminated the most at last to electric arc.When electric arc is introduced arc control device, be separated into many sections by the metal gate sheet in the arc control device, every section electric arc all produces a proximal pole voltage near the metal gate sheet, the pressure drop of whole electric arc is improved rapidly, makes arc extinction.
In traditional miniature circuit breaker, owing to will realize many functions, the common internal structure of the circuit breaker that people use is complicated, and the intraware action is insensitive, and reliable in action property is lower, can not in time realize the break-make of circuit.
Summary of the invention
Problems such as to mention the miniature circuit breaker internal structure in the background technology complicated in order to solve, and the intraware action is insensitive, and reliable in action property is lower, the utility model provide that a kind of internal structure is simple, the miniature circuit breaker of flexible operation, reliable in action.
The technical scheme of the utility model is: a kind of miniature circuit breaker; Comprise housing, moving contact, operating mechanism, free tripping mechanism, bimetal leaf and electromagnetic system; Described operating mechanism comprises handle and U type connecting rod; Described free tripping mechanism comprises tripping and snap close, and described handle is attached thereto and can makes U type connecting rod to drive tripping through the U type connecting rod that inserts tripping and in housing, slides, and described tripping can be around the leg rotation of the U type connecting rod that inserts tripping; Described tripping one end blocks with snap close mutually; The described tripping other end with link to each other with moving contact, described snap close one end and housing are hinged, described electromagnetic system links to each other with snap close respectively with bimetal leaf.
As a kind of improvement of the utility model, described bimetal leaf links to each other with snap close through the bimetallic connecting rod, and the aluminium nail in the described electromagnetic system links to each other with snap close through lever.
Another kind as the utility model improves, and described lever one end and housing are hinged, and the not hinged end of described snap close and lever is located on the housing side by side.
Another kind as the utility model improves, and described housing locates to be provided with support at snap close with lever mutually side by side.
Improve as the another kind of the utility model, comprise locking projection, through hole and contact-making surface on the described snap close, described tripping blocks with locking projection on the snap close mutually.
Another kind as the utility model improves, and described snap close is the flat structure.
Another kind as the utility model improves, and has support shaft on the described housing, and described support shaft is provided with contact supporting, is provided with moving contact in the said contact supporting, and described tripping links to each other with moving contact through contact supporting.
The beneficial effect of the utility model is, internal structure is simple, flexible operation, and installation, maintenance is convenient, and make-break capacity is strong.
Description of drawings
Accompanying drawing 1 is the structural representation of the utility model embodiment.
Accompanying drawing 2 is a buckle structure enlarged diagram among the utility model embodiment.
Among the figure, housing 1, support 11, handle 2, U type connecting rod 21, electromagnetic system 3, aluminium nail 31, bimetal leaf 4, bimetallic connecting rod 41, contact supporting 5, moving contact 6, snap close 7, locking projection 701, through hole 702, lever 71, tripping 8, indication piece 9.
Embodiment
Below in conjunction with accompanying drawing the utility model embodiment is described further:
By shown in Figure 1; A kind of miniature circuit breaker; Comprise housing 1, indication piece 9, moving contact 6, operating mechanism, free tripping mechanism, bimetal leaf 4 and electromagnetic system 3, described operating mechanism comprises handle 2 and U type connecting rod 21, and described free tripping mechanism comprises tripping 8 and snap close 7; Described handle 2 is attached thereto and can makes U type connecting rod 21 to drive tripping 8 through the U type connecting rod 21 that inserts tripping 8 and in housing 1, slides; Described tripping 8 can be around the leg rotation of the U type connecting rod 21 that inserts tripping 8, and described tripping 8 one ends block with snap close 7 mutually, and described tripping 8 other ends link to each other with moving contact 6 with indication piece 9 respectively; Described snap close 7 one ends and housing 1 are hinged, and described electromagnetic system 3 links to each other with snap close 7 respectively with bimetal leaf 4.It is simple to the utlity model has internal structure, flexible operation, and installation, maintenance is convenient, and make-break capacity is strong.
Combined shown in Figure 2ly by Fig. 1, described snap close 7 is the flat structure, comprises locking projection 701, through hole 702 and contact-making surface 703 on the described snap close 7, and described tripping 8 blocks with locking projection 701 on the snap close 7 mutually.Described bimetal leaf 4 links to each other with through hole 702 on the snap close 7 through bimetallic connecting rod 41, and the aluminium nail 31 in the described electromagnetic system 3 passes through lever 71 and links to each other with snap close 7, has little gap between described aluminium nail 31 and the lever 71.Described lever 71 1 ends and housing 1 are hinged; Described snap close 7 is located on the housing 1 with the not hinged end of lever 71 side by side; Hinged end is not corresponding with lever 71 for contact-making surface 703 on the said snap close 7, and described housing 1 locates to be provided with support 11 at snap close 7 with lever 71 mutually side by side.Certainly in the utility model, for process, easy for installation, can make snap close and lever that identical structure is arranged.Contact-making surface on the snap close makes the rotation of the more convenient promotion snap close of lever, has little gap between aluminium nail and the lever, even when shake, also can prevent reverse rotation that aluminium nail promotes lever rotation and the lever support that comes off.The snap close of flat is the interior space of reasonable use housing more, and the setting of locking projection has guaranteed effective locking, and an end of snap close and lever is arranged side by side, and is provided with support at the housing correspondence position, makes lock dog when stressed rotation, and is more steady.
Have support shaft on the described housing 1, described support shaft is provided with contact supporting 5, is provided with moving contact 6 in the said contact supporting 5, and described tripping 8 links to each other with moving contact 6 through contact supporting 5.When needs broke off, contact supporting can react more rapidly, and moving contact is broken off.
In the utility model, in normal condition, tripping 8 is slided through pulling handle 2, at this moment, and tripping 8 heads extruding contact supporting 5, simultaneously, indication piece 9 rotates under the torsion spring effect thereupon.Described contact supporting 5 drives moving contacts 6 motions, and when moving contact 6 contacted with fixed contact, at this moment, the afterbody of tripping 8 was just in time corresponding with the locking projection 701 of snap close 7, and tripping 8 is fastened by snap close 7, and tripping 8 can not be rotated.Described bimetal leaf 4 links to each other through through hole 702 on bimetallic connecting rod 41 and the snap close 7, and the aluminium nail 31 in the described electromagnetic system 3 passes through lever 71 and links to each other with snap close 7.When dynamic and static contact contacted and enough contact pressures are arranged, miniature circuit breaker was connected electric loop.When open circuit protection, through the local temperature variation of bimetal leaf 4 sensing miniature circuit breakers, judge the size of current of circuit system, realize excess current protective function.When loop current remains on load current value that miniature circuit breaker sets and when following, the distortion that the thermal effect that this electric current produces produces bimetal leaf 4 is very little, and tripper is triped; When loop current surpasses the rated current of setting; Bimetal leaf 4 temperature of miniature circuit breaker raise; Can produce enough thermal deformations, described bimetal leaf 4 links to each other through through hole 702 on bimetallic connecting rod 41 and the snap close 7, and bimetal leaf 4 makes snap close 7 rotate around jointed shaft; The locking projection 701 of snap close 7 can not fasten tripping 8, and described tripping 8 is around the leg rotation of the U type connecting rod 21 that inserts tripping 8.At this moment, tripping 8 heads extruding indication piece 9, indication piece 9 rotates, the display circuit situation; Moving contact 6 and contact supporting 5 under the torsion spring effect, make dynamic and static contact separately cut off current circuit rapidly respectively simultaneously, realize current protecting function.In short circuit protection system; By solenoid electromagnet sensing loop change in current; When loop current is in normal value or when the short-circuit protection value of setting was following, the electromagnetic attraction that solenoid electromagnet produces can not overcome the active force of reaction spring, iron core remains on initial position; When the current circuit failed because, electric current sharply increases, and the electromagnetic force that solenoid electromagnet produces overcomes the active force of reaction spring; Iron core promotes aluminium nail 31, and aluminium nail 31 promotes levers 71 rotations and since lever 71 and snap close 7 not hinged end be located at side by side on the support 11; So lever 71 makes snap close 7 rotate around jointed shaft, free tripping mechanism is threaded off, moving contact 6 is opened under the effect of torsion spring fast; Cut off current circuit, realize short-circuit protection function.
Every technical staff's notice: though the utility model is described according to above-mentioned embodiment; But the invention thought of the utility model is not limited in this utility model; The repacking of any utilization inventive concept all will be included in this patent scope of patent protection.
Claims (7)
1. miniature circuit breaker; Comprise housing (1), moving contact (6), operating mechanism, free tripping mechanism, bimetal leaf (4) and electromagnetic system (3); Described operating mechanism comprises handle (2) and U type connecting rod (21); Described free tripping mechanism comprises tripping (8) and snap close (7), and described handle (2) is attached thereto and can makes U type connecting rod (21) to drive tripping (8) through the U type connecting rod (21) that inserts tripping (8) and in housing (1), slides, it is characterized in that: described tripping (8) can be around the leg rotation of the U type connecting rod (21) that inserts tripping (8); Described tripping (8) one ends block with snap close (7) mutually; Described tripping (8) other end links to each other with moving contact (6), and described snap close (7) one ends and housing (1) are hinged, and described electromagnetic system (3) links to each other with snap close (7) respectively with bimetal leaf (4).
2. miniature circuit breaker according to claim 1; It is characterized in that described bimetal leaf (4) links to each other with snap close (7) through bimetallic connecting rod (41), the aluminium nail (31) in the described electromagnetic system (3) links to each other with snap close (7) through lever (71).
3. miniature circuit breaker according to claim 2 is characterized in that described lever (71) one ends and housing (1) are hinged, and described snap close (7) and the not hinged end of lever (71) are located on the housing (1) side by side.
4. miniature circuit breaker according to claim 3 is characterized in that described housing (1) locates to be provided with support (11) mutually side by side at snap close (7) and lever (71).
5. miniature circuit breaker according to claim 1 is characterized in that comprising on the described snap close (7) locking projection (701), through hole (702) and contact-making surface (703), and described tripping (8) blocks with locking projection (701) on the snap close (7) mutually.
6. miniature circuit breaker according to claim 1 is characterized in that described snap close (7) is the flat structure.
7. miniature circuit breaker according to claim 1; It is characterized in that having support shaft on the described housing (1); Described support shaft is provided with contact supporting (5); Be provided with moving contact (6) in the said contact supporting (5), described tripping (8) links to each other with moving contact (6) through contact supporting (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203334311U CN202221746U (en) | 2011-09-06 | 2011-09-06 | Small-size circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203334311U CN202221746U (en) | 2011-09-06 | 2011-09-06 | Small-size circuit breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202221746U true CN202221746U (en) | 2012-05-16 |
Family
ID=46043768
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203334311U Withdrawn - After Issue CN202221746U (en) | 2011-09-06 | 2011-09-06 | Small-size circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202221746U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102332371A (en) * | 2011-09-06 | 2012-01-25 | 浙江加西亚电子电器有限公司 | Small-sized circuit breaker |
| CN102915890A (en) * | 2012-10-25 | 2013-02-06 | 温州市新蓝天电器有限公司 | Crow plate trip circuit breaker |
-
2011
- 2011-09-06 CN CN2011203334311U patent/CN202221746U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102332371A (en) * | 2011-09-06 | 2012-01-25 | 浙江加西亚电子电器有限公司 | Small-sized circuit breaker |
| CN102332371B (en) * | 2011-09-06 | 2013-11-06 | 加西亚电子电器有限公司 | Small-sized circuit breaker |
| CN102915890A (en) * | 2012-10-25 | 2013-02-06 | 温州市新蓝天电器有限公司 | Crow plate trip circuit breaker |
| CN102915890B (en) * | 2012-10-25 | 2015-04-22 | 温州市新蓝天电器有限公司 | Crow plate trip circuit breaker |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Shanghai Chaoan Electrical Co., Ltd. Assignor: Zhejiang Gacia Electrical Appliances Co., Ltd. Contract record no.: 2012330000250 Denomination of utility model: Small circuit breaker with protection of electric leakage, overload and short circuit Granted publication date: 20120516 License type: Exclusive License Record date: 20120509 |
|
| LICC | Enforcement, change and cancellation of record of contracts on the licence for exploitation of a patent or utility model | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20120516 Effective date of abandoning: 20131106 |
|
| RGAV | Abandon patent right to avoid regrant |